KEYWORDS: Control systems, Sensors, Air temperature, Temperature control, Fuzzy logic, Web services, Databases, Temperature sensors, Internet, Connectors
The article discusses intelligent ways to regulate room temperature. It is shown how the project architecture is built and the tools for its implementation are selected using intelligent algorithms, mainly fuzzy logic. Recommendations are given for the selection of software and hardware for implementing microclimate control systems. The hardware can be implemented using a NodeMCU board with a built-in ESP8266 module, and DS18B20 integrated temperature sensors connected to it. It is recommended to program the device in the Arduino IDE. The software part can also be implemented as a web service and a database connected to it. The web service is implemented using the Flask framework. The database is implemented in the MySQL environment. Nginx is selected as the web server for deploying the web service. The results of this work can be used in various rooms with installed heating, air conditioning and ventilation devices to maintain optimal microclimate conditions with minimal energy costs.
The integrating role of the transport schedule of regular passenger transportation for the tasks of the tactical and operational levels of transport system management determined the relevance of the presented study. The purpose of the study is related to the development of methods and algorithms for the formation of schedules of regular passenger transport. The formulation and formalization of the task using the schemes of formation of schedules and priority rules are carried out. For numerical experimentation, a mock-up of a program for forming a railway schedule and a test task were developed, including 4573 applications for weekly schedules of a railway network containing 100 stations, 128 runs between stations, 100 passenger routes of different frequency, 471 trains per week. The developed layout of the program, in addition to performing calculations using the presented algorithms, visualizes the results of numerical experimentation in the form of spiral representations of station schedules and runs. The operability of the developed methods and algorithms has been confirmed. The conclusions and discussion of the results of the study are presented.
Introduction. From a geometric point of view, a water tower is a shell of rotation that has axial symmetry. For an axisymmetric system, it is possible to replace the spatial design scheme with a flat design scheme. This scheme can be used, among other things, under the action of arbitrary loads, such as wind loads and additional loads that arise when the structure tilts. Purpose of the study: Development and application of high-precision and cost-effective methods for analyzing the stress-strain state of combined axisymmetric systems using the example of a water tower. Research objectives: Development of mathematical models of asymmetrical loads, solution of practical problems arising during the installation and operation of water towers. Methods: orthogonal sweep method S.K. Godunov, Newton-Kantorovich method, finite element method, harmonic analysis, expansion of a function in Fourier series. Results: A method for analyzing the stress-strain state of combined systems using axisymmetric design schemes in the AXIS-Lq 2.1 program is considered using the example of a water tower. Mathematical models of wind loads and loads arising when a structure tilts are proposed, with the expansion of load functions in Fourier series. A dependence is proposed that approximates the graph of the aerodynamic coefficient. The Fourier coefficients for this dependence are found and the convergence of the trigonometric series is investigated. An example of using the AXIS-Lq 2.1 system for the finite element analysis of a Rozhnovsky water tower with a volume of 50 m3 is presented.
The results of the study of the strength of slag-alkaline concrete depending on the amount of activator are presented. As an activator of slag-alkaline binders, the waste of caprolactam production of the Chirchik plant "Electrochemprom" was investigated. The best results were shown – ground granular phosphoric slags in a composition with an activator - sodium sulfocarbonate, which is recommended to be used to strengthen soils. The required strength class of soils can be obtained by adjusting the amount of slag, sulfocarbonate, as well as using various technological techniques.
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