This PDF file contains the front matter associated with SPIE Proceedings Volume 12339, including the Title Page, Copyright information, Table of Contents and Conference Committee list.

The models of kelp-cultured rafts from the Yellow Sea and Bohai Sea were taken in this study to provide references for the design and selection of kelp-cultured raft as well as the selection of the cultured location. The model test was conducted in the test tank with a main scale of 90 m × 6 m × 3 m to investigate the hydrodynamic performance of a group of rafts in the longitudinal arrangement and a single raft in the long-line arrangement with and without kelp hanging. Results show that regardless of the longitudinal or long-line arrangement of kelp-cultured rafts, the overall force of the raft increases with the increase of current velocity. The force value of conning kelp-cultured rafts is 9.0%–33.2% higher than that of unconning kelp-cultured rafts under the same external conditions. In addition, it is recommended that the length of each main cable should not exceed 50 meters.

Using a self-built water mist fire extinguishing experimental platform, the suppression process of water mist nozzles on oil pool fires in different spatial positions was studied, and it is hoped that it can provide theoretical support for the installation of water mist fire extinguishing nozzles for floating roof oil tanks. The spray pressure is set to 4Mpa, the fire source is crude oil, 150ml of fuel is taken each time, and the oil basin is 30cm in diameter. The experiment is designed for multiple sets of comparative tests. The results show that when the nozzle is facing the oil pan, the height of the nozzle has a significant influence on the fire extinguishing effect. The higher the nozzle height, the longer the fire extinguishing time. When the nozzle is shifted in the lateral position, the height of the nozzle and the distance of the lateral offset affect each other, and there is a critical lateral position. The crucial position in this experiment is 7.5cm-10cm. Beyond this distance, regardless of the height of the nozzle, Inability to effectively extinguish the fire.

Gas is an important energy medium for steel companies, including coke oven gas, blast furnace gas, converter gas and other categories. The amount of gas is large，and the equipment devices involving gas are huge in steel companies. Gas pipelines are also spread all over. Therefore, there are potential accidents such as poisoning, suffocation, fire and explosion. The consequences of the accident are often very serious. In this paper, the main problems of gas safety management of steel enterprises are analyzed, and the potential reasons for the problems are studied. The framework and core index of the standard of steel enterprise gas safety management prepared by the project team are fully introduced. The release and implementation of the standard is conducive to promoting safety management in steel companies.

New energy vehicles, mainly electric vehicles, are an inevitable choice for the development of the modern green economy. As its main power source, lithium-ion battery has a direct impact on the performance and cost of new energy vehicles. Through a brief description of the current environmental situation, new energy vehicles were raised, and the advantages of power lithium battery are introduced by comparing with other batteries. The development status of ternary lithium battery and lithium iron phosphate battery in China is summarized, and the battery matching of mainstream auto companies is compared. The development trend of lithium-ion battery is prospected from the point of view of cathode and anode materials, electrolyte and separator. The result shows that, under the premise of meeting the safety and life index, greatly increasing the energy density of battery will be the development trend of power lithium battery. High-voltage and high capacitance cathode, silicon anode, high voltage-resistant electrolytes, solid electrolytes, and high temperature-resistant separators will have broad prospects.

To investigate the friction performance of transmission oil, an evaluation method based on actual wet clutch engagement mode of loader was established, which considered the influence of sliding speed and pressure of wet friction plates. The results show that transmission oil has a significant effect on the mid-point dynamic friction coefficient, the end-static friction coefficient and the static-to-dynamic ratio. At the same speed, the mid-point dynamic friction coefficient increases as the pressure increases, and the end static friction coefficient and the static-to-dynamic ratio both show a downward trend; At the same pressure, the coefficient of mid-point dynamic friction decreases with the increase of sliding speed. The coefficient of friction decreases and the static-to-dynamic ratio increases with the increase of energy density; the effect of speed on torque transmission is less than that of load. The designed test program can evaluate and effectively distinguish the transmission oils in terms of shift comfort and power transmission capacity and provide a basis for the selection of transmission oil.

Gas-liquid suction flow is common in daily life and industrial process, which normally brings problems including noises and vibrations. In this paper, we designed an experimental apparatus to investigate the whole process for liquid film suction through a tube, from liquid inundating the tube nozzle to complete detachment. Bubbly flow, slug flow, and tubular co-flowing jet flow were observed and the mechanism of flow transition was discussed. The generation of bubble/slug, the change of its length, the interaction between each other, and the whole life of small liquid column were studied in detail. We hope this study could provide a clear understanding of vibrations in the process of non-contact liquid suction and guide the design and optimization of related industrial applications.

A V-typed multi-slotted trawl-doors was designed for the bottom trawl fishery, and its hydrodynamic performances was investigated in a wind tunnel. Two different kinds of model with right trapezoid and isosceles trapezoid wings were tested on six-component force balance with the wind speed of 28m/s. Data for measuring the performance of trawl-door included: lift coefficient Cy, drag coefficient Cx, centre of pressure coefficient Cp, pitch moment coefficient Cm. Analysing results showed that the maximum lift to drag ratio of the trawl-doors with the isosceles wings was higher (3.482 at α =22.5°), and the maximum lift coefficient of the trawl-doors model with the right trapezoid wings was higher (2.099 at α =55°). The comparative analysis of pitch moment coefficient showed that the pitch stability of model with the right trapezoid wings is better, the comparative analysis of centre of pressure coefficient showed that the rolling stability of model with the isosceles trapezoid wings is better.

A variable cross-section cantilever hollow cylinder is a special structure widely used in engineering. Based on the quasi-static limit analysis and impact dynamics, the dynamic characteristics of a cantilever hollow cylinder with a variable cross-section of constant thickness and variable thickness, under impact load, are studied respectively. The load position parameter and the plastic hinge position parameter are defined, and the conditions for determining the position of the plastic hinge are given based on the load position parameter. The expression of acceleration of the cantilever end and the control equation of the plastic hinge position parameter is derived from the momentum theorem and the moment of momentum theorem. According to the differential relationship between distributed inertial force and shear force and the differential relationship between shear force and bending moment, the expressions of shear force and bending moment are derived. The influence of the load position parameter on the plastic hinge position parameter and on the acceleration of the cantilever end, and the influence of the plastic hinge position parameter on the acceleration of the cantilever end are analyzed. The results of calculation examples show that when impact load obviously exceeds the static limit load of fixed end and the load position parameter μ is smaller than the critical load position parameter μic, the plastic hinge is located in the cylinder; the theoretical results of the acceleration of cantilever end ac and the plastic hinge position parameter λ are in good agreement with their numerical results; λ increases approximately linearly with μ; μ-ac relation curve and λ-ac relation curve are similar.

The electric lift landing door is the separation barrier between the lift well and the floor space. The fire resistance of the landing door has an important impact on the evacuation of the building in the event of a fire. In order to acknowledge the fire resistance performance of the current landing doors, a set of test equipment suitable for fire resistance test of landing doors was established, including a convenient sample installation device. Different type samples from several manufacturers were tested, including a glass landing door sample. The fire resistance performance was analyzed and useful conclusions and suggestions were put forward.

Titanium dioxide nanoparticles have been widely used in many industrial fields due to their outstanding physicochemical properties. Particularly, the inter-particle affinity can significantly affect the behaviors the fluid interfaces. In this paper, the rheological properties of TiO₂ nanoparticles at two-phase interface were summarized by measuring and calculating its dilatational viscoelasticity and dilatational phase angle changes in the adsorption and aggregation of TiO₂ nanoparticles at the air/water interface using bubble and droplet morphology analysis methods. The experimental results show that the dilatational modulus and dilatational elasticity of the interface first increase with the concentration, and then decrease slightly after reaching the adsorption limit, while the dilatational viscosity continues to increase, the interface is still dominated by elasticity as a whole. With the increase of the dilatational frequency, the dilatational modulus and elasticity increase rapidly and then tardily, while the dilatational viscosity decreases quickly. It can be seen that the final interface tends to be pure elastic. Moreover, the phase Angle increases with the concentration and decreases with frequency. As a quantitative feature of viscoelasticity, the phase Angle also reflects the viscoelastic variation trend of the interface.

In this paper, the capacity of secondary battery with different chemical composition is compared under an identical temperature and depth of discharge. Major materials that are used as electrode are selected and compared with respect to their microstructure. It is concluded that bonding type inside the electrode largely dominates the capacity performance of the material as an electrode.

In view of the present domestic research status of drilling design, based on the characteristics of drilling engineering design under network environment, this paper puts forward the integration under the network environment the driller. Using computer database technology and network technology, the unified hardware and software platform to build design basis and data support, drilling engineering design, the cementing design, the functions and main features of the system are described in detail. The application of this system, enables multiple drilling engineering design or distribution in different parts of the design personnel, in the design and drilling engineering and geological drilling process fully.

In recent years, space-borne InSAR technology has rapidly become one of the commonly used new surveying and mapping technologies due to its advantages, such as all-time, all-weather, spatial continuity, high precision and non-contact. Firstly， this paper introduces the basic principles and application fields of InSAR technology; then analyzes the application advantages of InSAR technology in power engineering; summarizes the current application of InSAR technology in power engineering,and looks forward to the prospect of the popularization and application of InSAR technology in China's power engineering industry.

The construction of a digital China requires accelerating the promotion of independent innovation of network information technology, deep integration of the Internet and the real economy, and accelerating the digitization and intelligentization of traditional industries. The digital grid is an indispensable part of the implementation of the digital China strategy. It is the basis for building a "holographic digital grid" and a "smart grid". It promotes the deep integration of the Internet, big data, and artificial intelligence with the real economy, and promotes the "Internet + electricity".

The surface quality inspection of pressure vessel surface welds was an important part of the normative inspection. First this article analysed the current welding seam surface parameter inspection methods and found out that the parameter measurement index defined by the standard does not mention the coexistence of multiple defect parameters. Then we studied the feature segmentation method of the single quality parameter of the pressure vessel longitudinal weld and girth weld under the coexistence of multiple defect parameters, including the characterization analysis of order quality parameters for the coexistence of multiple defects on the surface of pressure vessel longitudinal welds, and the calculation index of order quality based on the coexistence of multiple defects on the surface of pressure vessel welds based on parameter segmentation, extend the standard definition of pressure vessel longitudinal and girth weld parameter measurement indicators to multi-parameter coexistence. The proposed detection index for the single quality parameter of the weld under the coexistence of multiple defect parameters can better reflect the actual appearance of the weld surface of the pressure vessel, and has the characteristics of good applicability and clear measurement indicators.

ZrO₂ ceramic parts were prepared by DLP technology. The effects of powder characteristics, solid-phase content and sintering temperature on the properties of the parts were studied. The results show that the optimal grinding parameters are rotation speed of 500 r/min and grinding time of 5h, and the average particle size of ZrO2 powder is 8 μm; With the increase of solid-phase content, the viscosity and fluidity of slurry increase; Increasing grinding speed and time can slow down the increase of viscosity and improve the fluidity of slurry; When the solid-phase content is 70% and the temperature is 1600℃, the effect of the sintered part is the best. With the increase of the solid-phase content, the shrinkage of the sintered part decreases and the compressive strength increases. The experimental results are verified by SEM micro morphology test.

Low-frequency passive vibration isolation technology is a key research object in the field of engineering vibration isolation. Numerous papers have studied on low-frequency passive vibration isolation technology, but few on systematic and comprehensive discussions on its characteristics, applications and advances. Focusing on the low-frequency passive vibration isolation technology whose effectiveness has been verified by engineering practice, the research and application status of low-frequency passive vibration isolation technology are introduced from the aspects of vibration isolator device and vibration isolation structure. Finally, the application and development trend of low-frequency passive vibration isolation technology in ship field are prospected. Through systematic summary, the research and development of low-frequency passive vibration isolation technology are presented clearly and completely, which can be used for reference by researchers and engineers in the field of low-frequency vibration isolation.

The hydrofoil is a structure that makes use of the pressure difference between the upper and lower surfaces to make the payload move fast and float on the water surface. For the stability of the hydrofoil in water, a two-dimensional model of the hydrofoil with A18 and NACA-66 as examples was established, and a rotating dynamic grid was drawn. k  model and 2-DOF model were used for simulation with fluent. The simulation results show that the two types of hydrofoil will gradually unstable after a period of time, A18 instability is caused by the uneven distribution of high pressure on the lower surface, NACA-66 instability is caused by the moment generated by the high pressure area of the leading edge.

The natural frequency and vibration mode of a new type asymmetric Stockbridge damper are calculated based on the finite element model of the damper, and the power characteristics of the damper are calculated by fixed speed method. The calculation results show that the damper has four natural frequencies and its frequency range is 11Hz~73Hz, which can effectively cover the frequency range of wire breeze vibration. The low-order vibration mode of the damper is mainly translational, while the high-order vibration mode of the damper is mainly rotational. The energy dissipation power of the new damper at the resonance point is greater than 0.5W, thus the energy dissipation capacity of the damper is high. The power dissipation value of wave-valley ratio in the energy dissipation power curve is less than 5, which meets the requirements for the energy dissipation capacity of Stockbridge dampers. The research results can lay a theoretical foundation for the application of the damper in transmission lines.

This paper designs the structure of automatic steel sheet wrapping machine, according to the demand for steel sheet wrapping. The main structure of this equipment includes uncoiler, pinch roll, shear, glue spraying machine and guide plate table. The field operation results show that the equipment can automatically and efficiently complete the steel sheet wrapping, and has high reliability.

In the process of continuous economic growth and social progress in China, further improve the requirements for product technology, product production standards have been further optimized. With the increasingly fierce competition in the market, the quality, appearance and structure of products are put forward higher requirements. This paper analyzes the application characteristics of the mechanical manufacturing technology, combined with the ultra precision cutting technology, fine processing technology, ultra-precision grinding technology, nano machining technology, materials, welding technology, the application of the numerical control machine tool technology main points, through the development trend of mechanical manufacturing technology and precision machining technology, its aim is to give full play to the mechanical manufacturing technology and precision machining technology application advantages, promote the healthy development of the industry economy.

Ships sailing on the sea, due to the uncontrollable environmental impact of wind and waves, will make a variety of complex periodic rocking motions, such as longitudinal and transverse rocking motions of greater impact. This study based on the simulated sea condition more freedom to swing test bench, simulate the swing of the ship on the sea, the eddy current sensor device on the rotor bearing, put on the laboratory bench, the rotor bearing device using programmable loader to control the rotor speed, using LMS_Test. Lab modal test instrument analysis software for data acquisition, signal analysis. In this paper, the influence of the periodic speed on the dynamic characteristics of the bearing rotor system under pitching condition and the influence on the distance acceleration of the system under different conditions are mainly analyzed.

A rescue stretcher is designed for the evacuation of wounded in the ship or on the land. Through the tripod and guide wheel device, it can flexibly operate in the narrow internal channel of the ship, complete the transportation and rescue of the wounded in the internal channel of the ship, and at the same time, the transportation of the wounded on land can realize the wheeled transportation and reduce the physical consumption of stretchers. Cocoon basket structure can effectively locate the wounded body and reduce the secondary injury. In this paper, the design scheme of the stretcher is given, and the Adams motion analysis is carried out. The prototype is built up the gangway model for climbing test, and the stretcher climbing gangway function is realized, and the expected effect is achieved.

The elevator drive host is installed in the machine room, and the car and counterweight are installed in the hoistway. The lift car and counterweight are suspended on the traction wheel of the driving host through suspension devices such as steel wire rope. Therefore, it is necessary to make an opening on the ground of the machine room in order to pass the suspension device through. In order to prevent small parts or maintenance tools from falling into the well from the ground opening, resulting in casualties, the safety technical specification for special equipment stipulates that the opening on the ground of the machine room shall be as small as possible, and the opening above the well must adopt a ring frame, which shall protrude from the ground for at least 50mm. At present, elevator construction units basically use concrete materials to build concrete ring frames around ground openings. Although not many concrete materials are required, special preparation shall be made. In addition, it will take several days for the frame to dry after masonry, which will affect the construction progress. In order to solve the above technical problems, this paper provides an adjustable device for the ground opening of elevator machine room, which has rapid installation and strong adaptability.

In order to meet the requirement that the busbars can continue operating without shutting down during GIS extension and voltage withstand tests，a new technology called double-fracture disconnecting switch is introduced in this paper. Firstly, this paper introduces the structure and working principle of the double fracture disconnecting switch. And then comparing with the traditional bus isolating switch, characteristics of double fracture isolating switch are summarized. It has many advantages in security, universality, economy and other aspects. Finally, a 220kV substation is taken as an example to introduce the specific implementation scheme of its application and verify the application value of this type of equipment in the substation.

Electric vehicles have become an important adjustable, controllable and flexible resource of the power grid. It is urgently needed to guide and regulate their electricity consumption behavior through market-oriented means to achieve better balanced matching and control with the multi-level grid divisional power generation and electricity consumption curves. This article uses blockchain technology to quantitatively analyze the cost and potential benefits of electric vehicles participating in peak-shaving auxiliary services, establish a strategy for the aggregation of electric vehicles to participate in grid peak-shaving auxiliary services, and guide and regulate electric vehicle power consumption behavior through market-based means. Through time transfer and storage of energy, the power system balance adjustment ability is improved.

Publisher’s Note: This manuscript, originally published on 28 September 2022, was withdrawn on 8 September 2023 per author request.

In recent years, China's construction industry is developing faster and faster, especially the level of urbanization construction continues to improve, the number of super high-rise building projects more and more. Super high-rise building plays a vital role in the development of the city and is an important building type to promote the centralization of urban blocks and the development of modernization. But in the construction process of super high-rise buildings, need to invest a lot of human, financial and material resources, if the super high-rise building problems, will produce huge economic losses, and even lead to casualties. Therefore, it is necessary to strengthen the research and analysis of super high-rise buildings, according to the specific characteristics of super high-rise buildings, discuss the mechanical properties of steel plate shear wall, grasp the actual design characteristics of super high-rise buildings. In addition, the importance of steel sheet shear wall structure design should be analyzed from the theory of mechanical properties of steel sheet shear wall of super high-rise buildings. The key points of mechanical performance simulation of steel sheet shear wall are studied in depth from different angles.

Porous flexible foam material board, represented by polyimide, has the characteristics of lightweight, vibration damping, and heat insulation, which is widely used in the cushioning and heat insulation structure of super-static, super-stable, and super-precision satellites. As the thermal insulation and buffer layer of satellite, the coefficient of thermal expansion is the key performance parameter and the important index of satellite structure design under the space environment with large temperature variation. However, the existing thermal expansion coefficient measurement technology has some problems, such as contact force interference, low measurement accuracy, complex measurement process. To solve the above measurement problems, this paper designs a thermal expansion coefficient measurement method of porous flexible materials based on digital image correlation (DIC) measurement technology. This method uses the temperature loading system with adjustable size to control the temperature of the measured object, and combines multi-target processing method and DIC technology to realize the thermal expansion coefficient measurement of porous flexible materials. Through the uncertainty evaluation and verification experiment of the method, it is shown that the method is accurate and reliable.

For roof and indoor and outdoor waterproof material coating operations, most companies still rely mainly on manual operations, including painting, rolling, manual spraying, and coil covering. There are phenomena such as low construction efficiency and uneven thickness control. In order to improve the construction process and better promote the application of spraying quick-setting products, this design has developed a robot spraying equipment with high accuracy, fast construction speed and convenient construction. Firstly, according to the area covered and the size of the obstacle, the robot's program will partition the whole area and determine the reciprocating working path. Secondly, design the mechanical structure scheme and clarify the technical route. A rotatable four-wheel mobile chassis is used to build workbenches and spray systems. Finally, this paper proposes a method of combining differential GPS and unit decomposition, combining the small area decomposed with high-precision differential GPS navigation and positioning, and designing a path planning algorithm.

According to the development requirements of space station manipulator platform force interaction system, a hardware-in-the-loop simulation verification system for force interaction system is designed, for better development of force interaction system control algorithm design and rapid verification. The system can complete the rapid prototype of motor servo control and the semi-physical simulation test of motor. The algorithm design, simulation and functional performance test of the force interaction system of the manipulator operating table of the space station have been completed by using the designed semi-physical simulation verification system. At present, this product has been applied in orbit and a series of on-orbit tests have been completed. The designed hardware-in-the-loop simulation system has good universality and expansibility, and can be applied to the algorithm design and simulation verification of other force interaction systems.

In order to accurately obtain the dynamic characteristics of the cutting mechanism of the longitudinal roadheader, a detailed theoretical analysis and derivation is carried out by combining with the working principle of the longitudinal roadheader. In addition, the resistance curve and torque curve of the cutting mechanism in different directions are obtained by using ADAMS to simulate. The results show that ADAMS can effectively predict the excavation resistance and torque of the cutting mechanism of mining longitudinal roadheader, which has certain reference value for future optimization design.

Because the surface myoelectric signal has the characteristics of small amplitude, low frequency, and will be interfered by various noises in the acquisition process, it is difficult to accurately obtain the necessary useful information, so it is acquired by some acquisition equipment. However, for similar products in the current market, it has the disadvantages of high price, bulky volume, poor adaptability and so on, which is not conducive to the extraction of sEMG signals. Therefore, a portable multi-channel EMG evoked potential instrument is designed for this situation. Stm32f103rct6 is the main control unit, including amplification and filtering circuit, AD conversion, data transmission, data storage and other components to realize the display of EMG. The results show that the device has the characteristics of low power consumption, simple use, strong adaptability, and can accurately obtain the useful information of sEMG signals.

This paper presents a turntable system, which can be used for torque, angle calibration. Based on the design of the turntable,the calibration experiment of the turntable system is carried out by using photoelectric autocollimator, and an error harmonic compensation model was established to compensate the angle measurement error of the turntable. The angle measurement accuracy of the designed turntable system is improved.

In the field of the mobile robot indoor location, aiming at the problems of poor stability of the WiFi signal fingerprint location and low accuracy of the single sensor location, this paper proposes a multi-sensor fusion assisted WiFi signal fingerprint location method for a mobile robot. This method is based on the extended Kalman filter (EKF) algorithm, combined with the trajectory information obtained from the inertial measurement unit (IMU) and the odometer, to fuse and correct the WiFi signal fingerprint positioning results, so as to realize a fusion positioning method with WiFi positioning as the main and multi-sensor positioning as the auxiliary. The experimental results show that the average positioning error of the fusion positioning algorithm proposed in this paper is controlled at 0.98 m, which can effectively solve the problem that fingerprint positioning using WiFi signal is greatly disturbed by the environment, and avoid the cumulative error caused by dead reckoning (DR), and improve the robustness and positioning accuracy of the positioning system.

SDN provides network managers with a global network view and programmability, making it more convenient for network managers to carry out security management. In recent years, machine learning has innovated many fields of computer science. The reinforcement learning method has emerged as an effective solution to sequential decision-making and control problems. Its method is widely used in the field of automation control. The computer network is becoming more and more complex and changeable. In the face of the emerging technology of IoT and the threat of attack and intrusion, the demand for adaptive security control is increasingly urgent. The reinforcement learning method is a feasible solution to achieve adaptive control. Based on the SDN framework, this paper develops and uses reinforcement learning applications for SDN network security management. For the existing problems, we improve the structure of D3QN and use the improved D3QN deep reinforcement learning agent to learn and mitigate apt attacks. Finally, the experimental results are evaluated, and the convergence results of the improved algorithm model are given, which shows the availability of reinforcement learning methods for adaptive threat mitigation in the SDN environment.

In the field of fire protection and security equipment technology, the front-end hardware equipment of traditional smoke detection systems is of single type and low intelligence. In the case of sudden, variable, smoke toxicity and transient fire conditions, it is impossible to provide timely and effective on-site status support for the fire control center's action decision making and on-site command, which seriously endangers the safety of life and property of rescuers and the people. As a front-line monitoring equipment, the fire alarm system puts forward higher requirements for the highly intelligent integration and linkage coordination of smoke detectors. The front end of the detector integrates various information acquisition modules such as microwave radar, smoke, and temperature. The core is designed based on the multi-source heterogeneous system architecture system. It can timely judge the defects of personnel and flames, reduce the occurrence of misjudgments, and use low-power narrowband communication technology to solve the problem which the traditional 4G/WiFi communication method has the defects of low transmission efficiency and short working life.

The inevitable axis misalignment between human wrist joint and the rehabilitation robot joint may bring undesired reaction force, which may block the acquire of wrist natural range of motion (ROM). To compensate axis misalignment, the introduction of self-alignment mechanism (SAM) to robots is one of the extensively applied method. However, this method may have effects on the biomechanical properties of wrist joint, and the definite effects of SAM on the wrist ROM have been rarely investigated up to date. The assessment of wrist active ROM can provide insight into improvements and effective monitoring during a rehabilitation program. To verify the effects of SAM on the wrist active ROM of flexion/extension, experiments involving 8 healthy subjects were conducted in the cases of SAM locked and SAM unlocked respectively, thus active ROM measured by robot-assisted assessment method. Results show that the mean values of the active ROM has a maximum increase of 21.64º with SAM unlocked compared to that with SAM locked. Test-retest reliability of the proposed assessment method was also analyzed with intraclass correlation coefficient more than 0.79, and standard error of measurement less than 4.17º. These suggest that the application of SAM on the WReD II was feasible and reliable to help acquire larger wrist active ROM.

With the development of big data and the rise of new infrastructure, the demand for telecom control boxes has increased significantly[1], while the current is still using manual means of installation, the degree of automation is low, and the detection of installation quality is not standardized.If mechanical automation technology is used to complete the partial mechanical automatic control of the telecommunications control box installation process, it will not only save labor costs, but also greatly improve the economic efficiency, free your hands and increase productivity[2] . Automatic installation equipment of telecom control box on wall is applied in the field of communication technology, and the following problems need to be solved. The automatic installation equipment has the functions of vehicle position movement, automatic alignment of wall installation position, group punching of wall, installation of expansion bolts, installation of telecom control box, installation of fixed sheet metal parts, etc. By analysis and calculation, after adopting the automation technology the speed of the original manual installation equipment can be increased from 2 pieces/hour to 5 pieces/hour.

Flexible and stretchable conductive materials play an important role in wearable devices. Stretchable conductive material has great impact on the performance of wearable electronic products. Nowadays, a stretchable and flexible current collector that combines mechanical stability and stable electrical conductivity attracts great attention in the field of flexible electronic devices. In this work, polyimide (PI) is used as the substrate, PI film is prepared by alkaline hydrolysis activation pretreatment, sequentially modified by grafting dopamine to obtain a PI film coated with polydopamine (PDA) coating on the surface. Then, the PDA@PI film is embedded with Ag particles via plasma treatment. And the obtained sample is put into the copper plating solution for electroless copper plating, and the time and temperature of the copper plating are accurately controlled to obtain a PI/Cu composite film. At the temperature of 70 ^oC after 10 min plating, the PI/Cu composite film exhibits uniform surface morphology excellent electrical properties with extraordinary flexibility

The composite electrode composed of transition metal elements has been paid much attention in electrochemical energy storage due to its complementary characteristics and high theoretical capacity. In this paper, the applications of various composite electrodes with transition metal elements as important components in improving performance are introduced, and the development prospects and problems to be solved have been prospected.

This conference presentation, originally published on 28 September 2022 and was withdrawn on 15 November 2022 per author request.

In the cloud computing environment, how to ensure that tasks are efficient and reasonable in scheduling and execution, is a problem that researchers and developers need attention. This paper combines particle swarm algorithm (PSO) and beetle antennae search algorithm (BAS) to comprehensively consider overall consumption and longest completion time, including scheduling time and processing time. The simulation experiments are carried out by Cloudsim, corresponding comparisons with FCFS, Round Robin, SJF, and PSO algorithms are shown: by comparing single PSO, the convergence effect is better; by comparing with other algorithms, it can not only reduce the average completion time, but also save costs.

The traceability system studied by predecessors had the problems of single traceability product, incomplete information collection, low automation level and so on. This study used the Internet of things and automatic information collection technology, combined with the growth and development characteristics of agricultural products in the planting industry, analyzed and traced the key nodes, and developed a general-type traceability system for agricultural products in the planting industry. The system consists of a Web terminal and an Android terminal. The Android terminal is mainly responsible for collecting field farming data, The Web terminal is connected to the Internet of things platform, the regulatory platform and the Android terminal, and is mainly responsible for the collection of Internet of things data and field farming data, as well as receiving the recall information of problematic products from the regulatory platform. The system has been effectively applied in 5 categories and 18 subcategories of planting agricultural products in Henan Province, and its universality has been preliminarily proved.

In recent years, with the increase of people's demand for electricity, users have higher and higher requirements for the reliability of electricity consumption. As an important way to distribute electric energy, the efficient and stable operation of distribution network has an increasing impact on people's economic life. On-site operation of distribution network is a key factor affecting the operation of distribution network, and its management level directly affects the safe production of distribution network and the safe and stable operation of distribution network. Under the background of this era, this paper proposes the design of the distribution network field operation safety management system based on DM(data mining) algorithm. In addition, the distribution network field operation regulations have brought significant changes to management activities, and management information systems have been built in all walks of life. Production activity management. Based on the traditional DM algorithm, this paper proposes a power grid field operation safety management system suitable for the current era. To a certain extent, the system can make the safety management and control work easier for practical operation, and a safety management system for on-site operation of the power grid has been formulated to effectively prevent the occurrence of power grid accidents caused by people. The research in this paper shows that the traditional distribution network field operation safety project type requires an engineering investment of 59%, while the new distribution network field operation safety project type requires only 43%. The number of planned adjustments to the traditional distribution network field work safety project type is 56, and the planned adjustment number of the new distribution network field work safety project type is 50. Compared with the traditional distribution network field operation safety project type, the new distribution network field operation safety project type has made obvious progress, and all aspects have been improved

As the underlying technology, blockchain is conducive to the construction of a credible environment for short video push. Through the deep integration of blockchain technology and short video, we can set up a data sharing mode, distributed push mode, traceability and accountability mode and contents management mode for short video platform, and effectively solve relevant problems, such as the homogenization of short video contents, the shackle of information cocoons and copyright authentication, increase the originality value for short video users and advance the optimization of short video push mode. In this paper, we will discuss challenges we may encounter in the development of short video push mode under blockchain technology from the aspects of short video contents creation, platform supervision, push algorithm and copyright protection.

In this design, the upper computer and the lower computer are realized through Arduino, ZigBee, DHT11, MQ135 and PM2.5. The lower computer collects the current environment data in real time and transmits it to the upper computer through ZigBee, and the upper computer displays it in real time through PC. After testing, the system runs stably and has high precision

The development of digital technology has brought changes to architectural design, and the application of modern computer technology has an impact on architectural design. In recent years, with the rapid development of artificial intelligence and other science and technology, the application of virtual reality technology in architectural design has begun to emerge. Virtual reality technology brings strong participation, interaction and dynamics to architectural landscape design. Virtual reality technology enables architectural landscape design to obtain a realistic three-dimensional virtualized interactive experience, and improves the effectiveness and forward-looking of architectural landscape design through effective data collection and analysis such as simulation feedback information. Based on virtual reality technology, this paper studies the application of virtual reality technology platforms such as Iris VR and Mars for virtual reality visualization processing to restore real visual effects; it studies the waterfront landscape design method based on the interactive experience data and analysis of virtual reality technology.

In recent years, with the rapid development of smart grid, the situation of user privacy disclosure and communication channel congestion has also intensified. The integration of edge computing and smart grid makes full use of the storage and computing power of cloud computing, while absorbing the real-time and distributed characteristics of edge computing, which solves the problem of communication channel congestion to a certain extent. The edge computing architecture itself still has many security risks, and privacy disclosure is unavoidable. The main research content of this paper is how to realize privacy-preserving and efficient data transmission in smart grid in the edge computing environment with limited computing resources and insecurity. The proposed smart grid data aggregation scheme can effectively protect the privacy of users from being violated, and has low computational and communication overhead. At the same time, it is convenient for service providers to analyze the data and further improve the security and reliability of the smart grid.

The state of charge of Li-ion battery in new energy vehicles is an important parameter reflecting the battery and power system. In order to achieve the purpose of real-time SOC estimation, this paper takes the lithium iron phosphate battery as the research object, establishes the RC second-order circuit model in MATLAB/Simulink environment, then discovers the parameters of different SOC and temperature effects on the battery model by establishing the mixed power pulse characteristics experiment, and brings the discerned parameters into the traditional single extended Kalman filter algorithm (EKF) and the parameters identified are brought into the conventional single extended Kalman filter (EKF) and traceless Kalman filter (UKF) algorithms for simulation experiments, and then the different experimental results of the two algorithms are compared and studied. The final experiments show that the traceless Kalman filter algorithm can significantly improve the estimation accuracy and convergence speed of the Li-ion battery charge state.

With the progress and popularization of information technology(IT), the evaluation of FLTM is becoming a new challenge facing China's English education. The progress of FLT system based on IOT technology is important to cultivate students' comprehensive quality, improve teachers' professional level and stimulate their interest in learning in an information environment. Firstly, this paper introduces the current situation and characteristics of FLTM, then expounds the existing problems of FLTM, studies the relevant applications of IOT, expounds the characteristics of IOT, and designs the evaluation system of FLTM based on IOT. After that, simulation experiments are used to test the effect of the system. Finally, the test results show that the FLTM evaluation system has good performance in three aspects: evaluation function, statistical function and feedback function (the full score is 5). This shows that the FLTM evaluation system based on IOT can meet the evaluation needs.

In hodiernal international world, immersive college(CE) teaching based on big data is an essential teaching activity. This teaching mode caters to the trend of globalization, and also greatly improves students' learning acceptance ability. This article studies the immersion based on big data design features of CE teaching mode, combing the concept of big data, immersion teaching means, teaching mode analysis of the characteristics of a typical, and so on, by in large data model, to discuss the design pattern of English teaching effect, and the questionnaire survey results. Based on big data technology, combined with hodiernal current CE teaching mode, based on the existing models on the armed big data tools, make truly rich immersive CE teaching mode characteristic of modern society, like a spark set the prairie ablaze the society as a whole class, let the modern college students immersed in modern CE teaching mode, maximum draw utility

The finite element method is used to establish a three-dimensional calculation model based on the layout and boundary calculation parameters of the square tapered steel lining section of the high-head discharge tunnel. According to its pressure-bearing capacity, vertical and horizontal stiffening beams and system anchors are added to the outside of the steel lining. The anti-external pressure structure is analyzed for stability review, and finally the conclusion that the recommended parameters are stable against external pressure is obtained.

Drum brake is one of the most critical safety components of the elevator system as a protective mechanical part for elevator operation and stop. This paper deeply investigates the relationship between the operation state of drum brake and the basic faults of its parts, through the mechanism analysis of each failure mode of drum brake. Then, the fault tree is established corresponding to each failure mode, by summarizing the failure factors of drum brake. Finally, the fault diagnosis for the failure cases of elevator drum brake are carried out according to the analysis results. It makes it possible to put forward diagnostic opinions to guide maintenance and ensure the safe operation of elevator.

Compared with the overhaul of equipment in other industries, the overhaul of chemical equipment has the characteristics of frequent, complex, and highly technical. The overhaul of chemical equipment is complex, highly technical, and risky. To ensure the smooth progress of overhaul operations, it is necessary to make full preparations before overhaul. Carrying out a series of safety treatments on chemical equipment before overhaul is the key to ensure the smooth progress of overhaul operations. The main safety treatment before the overhaul of chemical equipment can be divided into: safety treatment after parking and safety treatment after parking. Only by carrying out a series of safety treatments on chemical equipment before overhauling, eliminating various possible dangers and hidden dangers, the overhaul operation can be carried out smoothly. In this way, the safe and stable operation of chemical equipment can be ensured, thereby creating good conditions for safe production.

The rapid development of marine fish farming provides high quality protein for human society. The design, construction and performance calculation of large-scale aquaculture equipment provide convenience and safety. Based on CFD and diffraction theory, the motion and load response of the mooring system of the aquaculture vessel under full load in four different sea areas were studied in this paper. The calculation results in frequency domain and time domain show that: The mooring system can meet the environmental load and specification requirements of level 4 sea state; In the frequency range of 0.2rad/s ~ 0.8rad/s, the hydrodynamic response of the mooring system is large.

Reliable operation of the distribution network is an important foundation for the development of the power industry, and the management of distribution network defects is an important basic guarantee for the healthy operation of the distribution network. In view of the current problems in the processing of defects in power distribution equipment, this paper proposes a research plan that uses role authority design and automatic monitoring algorithms to find defects, track and deal with defects. The design plan includes defect statistics and defect whitelist functions. Practice and research show that this kind of design has considerable practical value for the management of distribution network operation defects.

In this paper, a full-scale two-dimensional simulation of boundary layer development is carried out on a flat plate base on real experiments. The influence of the trailing edge angle on the flow near the leading edge is investigated. According to the fact that a gap and a backward-facing step may appear in real experiment, a simulation of related flows near the trailing edge is also included in this paper. The results show that adjusting the trailing edge can effectively eliminate the pressure peak at the leading edge, and there is a crosstalk between the flow fields on the upper and lower surfaces of the plate through the gap, which may affect the boundary layer development on the working face. It is expected that the numerical simulation in this paper will provide guidance to the experiments of boundary-layer transition in the future.

In today’s Internet age, the explosive growth of video resources makes users face a large number of video resources every day. However simple data search can no longer accurately obtain the data users really want. In some respects, the large amount of video data reduces the effective use of video resources by people. It is an urgent problem to provide users with better video recommendation services through data mining. This paper studies the film and television recommendation system and algorithm design oriented to big data, consults related literatures to have a simple understanding of the structure of the film and television recommendation system, then optimizes the recommendation algorithm, and designs the film and television recommendation system according to the optimized algorithm. Then the designed system is tested. The test results show the accuracy of the recommended system is increased by 2% after the improved algorithm. The stability of the recommended algorithm is not very high from the fluctuation degree of the error bar.

With the development of sour natural gas, the corrosive medium CO2, H2S, chloride and water content in the produced gas have been increasing year by year, and the problem of pipeline corrosion failure has become increasingly serious. It is of great significance to analyze the causes of pipeline failure and propose corresponding countermeasures. In this paper, a burst natural gas pipeline in an oil and gas processing station is taken as the research object. The macroscopic morphology, residual wall thickness, chemical composition, tensile properties and metallographic structure of the burst pipeline are analyzed and tested. Combined with the actual working conditions, the fluid accumulation position and serious scouring position of the pipeline are simulated and analyzed by using CFD simulation analysis method. The high partial pressure of CO2 leads to the pipeline running in a strong corrosive environment, which aggravates the corrosion. The direct cause of pipeline burst is that the pipeline is corroded and thinned seriously under the synergistic action of acid medium and flow corrosion, and the remaining wall thickness is not enough to bear the working pressure, and pipeline burst occurs instantly. It is suggested that the residual wall thickness at the low point of liquid accumulation in service pipeline system should be measured regularly or a real-time monitoring system should be installed.

Grind-hardening has broad application prospects as a green compound machining method. By summarizing the research progress of grind-hardening, the constituent elements of grind-hardening surface integrity were further analyzed. The three factors affecting grind-hardening surface integrity are surface quality, surface quality and edge quality. It was concluded that exploring the active control method of grind-hardening quality would be a research hotspot in the future. Furthermore, it was very necessary to establish evaluation and quality control system for grind-hardening surface integrity.

The collision of liquid droplets is widely seen in nature and needs to be carefully controlled in biological and industrial processes, such as self-cleaning and anti-icing. In this work, we designed an experiment to investigate the effects of bullet droplets enfolded particles on the head-on collision of droplets on the substrate. We compared the results of collisions for the particle-free droplets and particle-involved droplets. The process of droplets collision with particles is subdivided into two stages: the collision stage, and the stretching stage. For the collision stage, the experimental process is consistent with the droplet collisions without particles, where the commonality is reflected as the elongated tail of the stationary droplet due to collision. For the stretching stage, since the particles in the bullet droplets are deposited on the substrate surface, the deposited droplets continue to pull the tail of the stationary droplet after the coalescence of droplets, causing the tail to break.

Under different turning radius for pipe elbow containing particulate medium flow problems, the solid-liquid two-way coupling simulation is carried out by using the discrete phase model in fluent fluid simulation software. The influence of different turning radius on the velocity and pressure of the flow field, particle motion trajectory and erosion rate of the pipe wall is studied. The results show that with the increase of turning radius, the flow field in the elbow tends to be flat, the maximum velocity decreases, and the maximum velocity is always located in the inner wall of the bend; the velocity gradient and pressure gradient in the elbow are all reduced; the particle collision with the inner wall of the pipeline is weakened and gradually converges to the outer side of the pipeline; the erosion area of the particles decreases, but the erosion area increases.

Soil resistivity is one of the direct factors affecting the grounding resistance of building lightning protection system. In order to understand the influence of meteorological factors on soil resistivity, this paper analyzes its variation law and relationship with ground temperature, soil humidity and precipitation through continuous monitoring of soil resistivity at different depths in Langfang, combined with meteorological data. The results show that: The soil resistivity has obvious seasonal variation, with the maximum in February and the minimum in July and August. The resistivity of shallow soil is larger than that of deep soil, and changes more obvious with season. The resistivity of the whole soil layer is negatively correlated with soil temperature and soil moisture. When the soil moisture is high, the precipitation cannot reduce the soil resistivity continuously.

System running on the Internet may face malicious visits or attacks from different regions and users every day. In addition to the necessary security protection components, the security of the system also requires effective configuration of servers and middleware to improve the security and robustness of the system. This article takes the security reinforcement of an in-use system as an example, uses a vulnerability scanning tool to find out the vulnerabilities of the system, analyzes the vulnerabilities, and proposes a vulnerability fix plan. After the system is reinforced, the security of the system and data can be better guaranteed.

In order to effectively reduce the construction accidents caused by water gushing in karst tunnel, the bad geological position, nature, occurrence and size in front of the excavation face of karst tunnel can be predicted by means of drilling method, geophysical exploration method and other technical means. Through innovation and practice in concrete projects, this paper puts forward a set of advanced and systematic construction technology in karst tunnels, which has achieved good economic and social benefits. This construction method combines geophysical exploration and drilling, and organically combines the detection characteristics of different equipment, so that the advanced prediction work in complex situations is more systematic, refined and accurate.

As one of the few pumps that can meet the ultra-pure and corrosion-resistant requirements in semiconductors, the bellows pump is in demand with high pumping efficiency for the high space cost of the semiconductor machine. Pumping efficiency means the flowrate per unit volume of pump, which is determined by bellows, the main cavity of bellows pump. Therefore, the key to improving pump performance lies in the optimization of the bellows. This paper derives the equations describing the relationship between the geometric parameters and properties of bellows. Combined with the movement analysis of bellows, the relationship among the stiffness, the displacement, and the flowrate is clarified. According to the relationship between the bellows parameters and the flowrate, a bellows with higher pumping efficiency is designed. The high agreement between experiments and calculations shows that the design is valid. We believe that this research can help design bellows with higher pumping efficiency in bellows pump.

To reveal the failure mechanism under random vibration and shock loading, the typical spacecraft electronic equipment of 3A21 aluminum alloy was tested in 16.1g of RMS acceleration by using electric shaker and 1600g of pyroshock magnitude by using pendulum shock equipment. And the fracture specimens were analyzed by scanning electron microscopy (SEM). The results show that 3A21 aluminum alloy exhibits brittle fracture followed by fatigue fracture under random vibration and brittle fracture directly under shock loading. To study the failure protection under random vibration and shock loading of 3A21 aluminum alloy, the good agreement has been achieved in the dynamic response between the numerical simulation and tests, which verifies the method of response spectrum analysis (RSA) under random vibration and time history waveform synthesis (WAVSYN) under shock loading. The maximum relative error was 14.3%. Then the equipment was optimally designed based on the numerical simulation, and the feasibility of the optimization method was verified by dynamic loading tests.

As a kind of vertical transportation, elevator has been widely used in people's life and production, and people have higher and higher requirements for elevators. In addition to safety and comfort, they also need to be beautiful, especially in shopping malls, hotels, office buildings and other places. In order to make the elevator beautiful, many elevator users will decorate the elevator car. However, the decoration company is only from the perspective of decoration, only responsible for the beauty of decoration, does not consider the safety performance of the elevator, and does not have professional knowledge of elevator. After the car is decorated, the decoration materials increase the weight of the elevator and the traction force of the elevator will change, which may seriously threaten the safe operation of the elevator, leading to the accident of car sliding and even squatting. Therefore, the elevator users should pay attention to the decoration, it is best to use light materials to reduce the weight added due to decoration as much as possible. After finishing the decoration of the car, the maintenance unit shall carry out relevant tests to ensure the safety of the elevator. This paper studies the change of traction force after elevator decoration, and puts forward some suggestions for reference.

In Ali’s original gravitational wave detection project, The gravitational wave detection telescope requires a large-size azimuth shaft coupling, while meeting the needs of a large number of cables and high torsional rigidity. Torsional stiffness needs to reach 1×10^5 N⋅ m/rad. Due to its simple structure and convenient processing, the slit coupling can be widely used in the transmission of the azimuth shafting of the astronomical telescope. This paper uses finite element software to analyze and compare the key structural parameters of the slit coupling and optimize the torsional stiffness. A large-size slit coupling suitable for gravitational wave detection telescopes was designed in combination with project requirements, which meets the design requirements and has certain guiding significance for the design of other slit couplings.

The mission of high-orbit space patrol is mainly to identify and track high-orbit non-cooperative targets, and to record the characteristics of targets by using loads (such as imaging cameras). Since the non-cooperative target is relatively far away, the visible light capture trace sensor is generally used to capture and track the target. This paper proposes a target acquisition and tracking control strategy for high orbit patrol satellite based on target orbit prediction and acquisition tracking measurement, which solves the problem of rough acquisition and precise tracking of the target.

Laser 3D imaging detection has the unique advantage of directly obtaining high-precision and high-resolution stereo data information[1-3]. It has broad development prospects in the field of information acquisition. At the same time, its independent and real-time processing algorithm is one of the hot aspects and difficulties in the field of information processing. The simulation of laser 3D imaging detection system is an effective means for the design of laser 3D imaging detection system and the development of information processing algorithm[7]. This paper focuses on the simulation of lidar 3D point cloud, which provides theoretical and technical support for the theoretical research, engineering design and target recognition of laser imaging system.

The construction of a large-diameter emergency rescue well dynamic risk knowledge map is a strong support for the rapid drilling of large-diameter emergency rescue wells in a big data environment. Aiming at the problem of static mapping of existing drilling knowledge graphs, this paper introduces the time dimension to characterize the dynamic, sudden and time-effective evolution characteristics of the risk events in the drilling process of large-diameter emergency rescue wells. After large-diameter rescue well drilling risk knowledge extraction, knowledge fusion, ontology construction and dynamic knowledge reasoning, etc., the dynamic risk knowledge map of large-diameter emergency rescue wells is systematically constructed from top to bottom. In the process of constructing the knowledge graph, aiming at the imbalanced classification problem of the entity samples of the domain data set, this paper proposes a dynamic knowledge reasoning method and applies the knowledge graph to the intelligent question answering system of large-diameter rescue wells.

The coastal marine ecological environment problems have led to the development and application of the aquatic ecological on-line monitoring system of the marine station. To improve the whole-process quality assurance and control system of marine automatic monitoring and ensure the accuracy and continuity of monitoring data, in this paper, the quality control and maintenance of the nutrients probe analyzer (NPA) in the aquatic ecological on-line monitoring system of Xiaomai Island Marine Environment monitoring station were studied by means of instrument performance audit, standard curve inspection and calibration, standard sample inspection and artificial synchronous comparison. The research results show that the overall performance and operating status of NPA are stable, and the monitoring data can basically truly reflect the current status of nutrients in seawater. The research in this paper has proved the reliability of the relevant quality control methods and provided a basis for the operational monitoring of the aquatic ecological on-line monitoring system of marine station.

As an important part of the elevator structure, wire rope carries all loads so that it may be broken due to broken wire, wear and tear, corrosion and so on. The traditional elevator wire rope detection method is inefficient and may cause danger to the inspector. The inspectors observe the defect of the wire rope with eyes and measure the diameter of the wire rope with vernier caliper. In this article, an elevator wire rope defect image analysis software is designed. It can measure without any modification to the elevator brake. so as to avoid the impact of the modification on the performance of the elevator brake. This method is suitable for long-term on-site monitoring and can be used as one of the detection technologies of elevator monitoring system. The software has three main functions: picture browsing and reading function, image processing function and historical data query function. Through processing the image and outputting the treatment results of the wire rope, the software provides professional reference of the elevator safety for the inspector. By comparing the change of wire rope defeat, the inspector can judge whether the wire rope of the elevator still meets the requirements.

With the development of computer and Internet technology, cryptocurrency has begun to be widely understood and accepted by people, and it has become a hot spot in the field of technology and finance. Bitcoin is a typical cryptocurrency. Its official wallet does not have a password retrieval function. When the password is forgotten, the wallet private key cannot be decrypted, and the property in the wallet cannot be used. It is possible to crack the wallet file. The demand is getting bigger and bigger. Therefore, this article aims to study the distributed cracking system of encrypted currency based on blockchain. Based on the analysis of cryptographic technology, block chain structure classification brute force cracking and distributed system, a system cracking scheme based on distributed computing network is proposed. Then the distributed cracking system for encrypted currency is designed and implemented. Finally, the system design was tested for performance. The test results show that the system realizes the work of distributed cracking using the idle hardware resources of ordinary personal computers, and the cracking efficiency will increase with the increase of the number of terminals, achieving the goal of system design.

This is a simple smart home system which is designed by using Arduino as the main controller. Some other elements, like photoresistor and PIR sensor, are required in implementing this smart home system. It involves functions of weather station, intruder alert, night light, and air conditioner. All applications in the circuit are represented by LEDs, if it is bright, corresponding application turns on, and if it is dark, the application it stands for turns off. By incorporating these functions together, detectors connected to micro controller will collect the data and check environment and send notifications back. Then the microsystem can give different command to control applications to achieve the goal of making the home more intelligent.

Credit cards are now being targeted by fraudsters in a variety of ways. Despite the fact that it is never pleasant, this is something that happens to someone in our everyday life. When cardholders disclose their credit card information to others, this happens. In this work, we have constructed a few machines learning (ML) models using anonymous credit card transaction data. The issue in detecting fraud is that it occurs far less frequently than legal transactions. The purpose of this research is to accurately predict fraud transactions. To detect fraud from a vast unbalanced dataset, we used nine different classifiers (Ridge Classifiers, Stochastic Gradient Descent (SGD), Linear discriminant analysis (LDA), Random Forest, Naive Bayes, Support Vector Machine (SVM), Decision Tree, Logistic Regression, and k-Nearest Neighbors (k-NN)). In addition, various classifiers were compared to ROC binary classifications. We have shown which classifiers has the best accuracy.

Given the different product quality of crops under different humiture, this study designed a humiture monitoring system for a greenhouse in the modern agricultural area. The system uses DHT11 sensors to collect environmental data. The test results show that this system can send out alarm when the humiture of greenhouse in the agricultural area is abnormal. So this system can be applied to a greenhouse in a modern agricultural area.

Using the leakage current of transmission line insulator can effectively characterize the external insulation state of insulator, which plays an important guiding role in flashover prevention and control. However, the actual situation is complex. How to correspond the monitoring data and various maintenance information with the leakage current has become a problem to be solved. Knowledge graph can present the knowledge structure relationship between different entities in a visual way, and can achieve the purpose of efficient data storage and accurate retrieval. Based on the knowledge graph, this paper will obtain the influencing factors of leakage current by analyzing the existing data and using knowledge extraction, and Neo4j is used to build the relationship between nodes, edges and attributes, and then complete the construction of knowledge graph. This is of great significance to improve the accuracy of leakage current prediction and use the predicted value to guide flashover prevention and control.

This paper explains the necessity and urgency of lifting operation management. The problems and hidden dangers of the current small and medium manufacturing enterprises in the lifting operations are analyzed. A lifting operation management system solution based on the mobile Internet cloud platform was proposed, and the system development was initially completed from the perspective of management integration. The system makes full use of the new generation of information technology to empower small and medium-sized manufacturing enterprises and applies management integration innovation to lifting operations. It breaks production data barriers and accelerates the application of production changes. It is conducive to improving the production efficiency of small and medium-sized enterprises and further guarantees the production safety of enterprises, becoming an important means to promote the sound development of enterprises.