Dr. Andrew Yuk Sun Cheng Profile

Dr. Andrew Yuk Sun Cheng

Associate Professor at City Univ of Hong Kong

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Author

Publications (24)

Proceedings Article | 1 September 2006 Paper

Light scattering by hexagonal ice cystals of cirrus clouds with preferred orientations

A. Burnashov, A. Borovoi, Andrew Cheng

Proceedings Volume 6303, 63030W (2006) https://doi.org/10.1117/12.695089

KEYWORDS: Scattering, Light scattering, Crystals, Clouds, Particles, Atmospheric particles, Atmospheric optics, Matrices, Solar energy, Mueller matrices

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Proceedings Article | 1 November 2005 Paper

Airborne solar spectroscopic measurements of nitrogen dioxide column density beneath the boundary layer

A. Y. S. Cheng, M. H. Chan

Proceedings Volume 5979, 59790T (2005) https://doi.org/10.1117/12.627299

KEYWORDS: Single crystal X-ray diffraction, Spectroscopy, Absorbance, Sun, NOx, Absorption, Scattering, Error analysis, Charge-coupled devices, Absorption spectroscopy

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Proceedings Article | 1 November 2005 Paper

Horizontal eye-safe Mie lidar for monitoring of urban aerosols in Macao

A. Cheng, A. Viseu, F. Leong, C. S. Chan, K. S. Tam, R. Chan

Proceedings Volume 5984, 59840L (2005) https://doi.org/10.1117/12.627300

KEYWORDS: LIDAR, Aerosols, Atmospheric particles, Data acquisition, Pollution, Meteorology, Photon counting, MODIS, Backscatter, Atmospheric optics

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Proceedings Article | 12 May 2005 Paper

Measurement of atomospheric nitrogen dioxide column density by solar spectroscopic method

M. Chan, A. Cheng

Proceedings Volume 5832, (2005) https://doi.org/10.1117/12.619835

KEYWORDS: NOx, Spectroscopy, Absorption, Charge-coupled devices, Absorbance, Light sources, Atmospheric particles, Scattering, Atmospheric optics, Spectral resolution

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Proceedings Article | 12 May 2005 Paper

Aerosol characteristics at the Hong Kong International Airport in 2003

A. Cheng, A. Walton, R. Chan, Olivia Lee

Proceedings Volume 5832, (2005) https://doi.org/10.1117/12.619557

KEYWORDS: Aerosols, Visibility, Humidity, LIDAR, Mass attenuation coefficient, Atmospheric particles, Optical testing, Mineralogy, Refractive index, Meteorology

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Proceedings Article | 12 May 2005 Paper

Mobile micro-pulse lidar measurement in Hong Kong

A. Cheng, A. Walton, R. Chan, C. Chan

Proceedings Volume 5832, (2005) https://doi.org/10.1117/12.619649

KEYWORDS: LIDAR, Mass attenuation coefficient, Clouds, Environmental sensing, Atmospheric modeling, Humidity, Receivers, Observatories, Diodes, Telescopes

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Proceedings Article | 17 March 2005 Paper

Urban atmospheric aerosol properties measured from sky radiometer in Hong Kong

Andrew Cheng, Peter Voelger

Proceedings Volume 5829, (2005) https://doi.org/10.1117/12.617177

KEYWORDS: Aerosols, Radiometry, Atmospheric particles, Optical properties, Refractive index, Scattering, Atmospheric physics, Light scattering, Radio optics, Atmospheric monitoring

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Proceedings Article | 17 March 2005 Paper

Retrieval of particle size of C1 clouds using a bistatic lidar

Andrew Cheng, Guenter Czerwinski

Proceedings Volume 5829, (2005) https://doi.org/10.1117/12.617506

KEYWORDS: Clouds, LIDAR, Scattering, Photons, Chlorine, Polarization, Laser scattering, Particles, Multiple scattering, Monte Carlo methods

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Proceedings Article | 30 November 2004 Paper

New approach for studies of time series of satellite observations of rainstorms: I. Mutual information calculations

Lisheng Xu, Yongzhong Wang, Jilie Ding, Andrew Cheng, Xiuwan Chen, Lian Duan

Proceedings Volume 5571, (2004) https://doi.org/10.1117/12.567830

KEYWORDS: Satellites, Remote sensing, Reconstruction algorithms, Earth observing sensors, Algorithm development, Nonlinear dynamics, Chaos, Atmospheric optics, Atmospheric sensing, Computer simulations

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Proceedings Article | 30 November 2004 Paper

New approach for studies of time series of satellite observations of rainstorms: III. Extraction of periodic components

Yongzhong Wang, Lisheng Xu, Jilie Ding, Andrew Cheng, Xiuwan Chen, Lian Duan

Proceedings Volume 5571, (2004) https://doi.org/10.1117/12.567849

KEYWORDS: Satellites, Interference (communication), Earth observing sensors, Remote sensing, Algorithm development, Nonlinear optics, Atmospheric sensing, Chaos, Analytical research, Stochastic processes

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Proceedings Article | 30 November 2004 Paper

Monitoring of environmental nitrogen dioxide concentration using visible acousto-optic differential optical absorption spectroscopy

Andrew Cheng, Mau Hing Chan

Proceedings Volume 5571, (2004) https://doi.org/10.1117/12.565313

KEYWORDS: Absorption, Charge-coupled devices, Spectroscopy, Absorbance, Light sources, Calibration, Environmental monitoring, Atmospheric optics, Molecules, Visible radiation

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Proceedings Article | 30 November 2004 Paper

New approach for studies of time series of satellite observations of rainstorms: II. The mutual information dimensions

Lisheng Xu, Yongzhong Wang, Jilie Ding, Andrew Cheng, Xiuwan Chen, Lian Duan

Proceedings Volume 5571, (2004) https://doi.org/10.1117/12.567842

KEYWORDS: Fractal analysis, Information theory, Satellites, Complex systems, Dynamical systems, Earth observing sensors, Remote sensing, Time series analysis, Atmospheric sensing, Chaos theory

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Proceedings Article | 4 November 2004 Paper

Data inversion of eye-safe micropulse Mie lidar for internal boundary layer studies

Andrew Cheng, Andrew Walton, Chiu Chan, Raymond Chan, Mau Chan

Proceedings Volume 5575, (2004) https://doi.org/10.1117/12.565314

KEYWORDS: Clouds, LIDAR, Signal attenuation, Aerosols, Signal to noise ratio, Transmittance, Mass attenuation coefficient, Meteorology, Data integration, Roads

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Proceedings Article | 21 March 2003 Paper

Urban aerosol spatial variations using a slant-angle scanning Mie lidar system

Andrew Cheng, Andrew Walton, Johnny Chan

Proceedings Volume 4893, (2003) https://doi.org/10.1117/12.466260

KEYWORDS: LIDAR, Telescopes, Aerosols, Mass attenuation coefficient, Mirrors, Analytical research, Receivers, Air contamination, Remote sensing, Optical instrument design

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Proceedings Article | 31 January 2002 Paper

Representation of a multiple scattering lidar return from layers of clouds by a multidimensional distribution characterizing the contributions of the diffusion of the emitted beam

Ulrich Oppel, Andrew Cheng, Jilie Ding, Sergei Prigarin, Martin Wengenmayer, Lisheng Xu

Proceedings Volume 4539, (2002) https://doi.org/10.1117/12.454436

KEYWORDS: LIDAR, Scattering, Clouds, Diffusion, Multiple scattering, Atmospheric modeling, Receivers, Laser scattering, Atmospheric particles, Aerosols

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Proceedings Article | 13 February 2001 Paper

Studies of the spatial correlation between urban aerosols and local traffic congestion using a slant angle scanning Mie lidar system

Andrew Cheng, Wesley Tsang, Jianhua Zhu

Proceedings Volume 4153, (2001) https://doi.org/10.1117/12.417052

KEYWORDS: LIDAR, Aerosols, Mass attenuation coefficient, Optical testing, Mineralogy, Atmospheric modeling, Humidity, Pollution, Signal attenuation, Directed energy weapons

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Proceedings Article | 30 September 1996 Paper

High-resolution image digitizing through 12x3-bit RGB-filtered CCD camera

Andrew Cheng, Michael Pau

Proceedings Volume 2898, (1996) https://doi.org/10.1117/12.253388

KEYWORDS: Image processing, RGB color model, Cameras, CCD cameras, Image quality, Optical filters, 3D image processing, Imaging systems, Computing systems, Medical imaging

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Proceedings Article | 24 September 1996 Paper

Fiber optic temperature sensor gives rise to thermal analysis in complex product design

Andrew Cheng, Michael Pau

Proceedings Volume 2895, (1996) https://doi.org/10.1117/12.252143

KEYWORDS: Sensors, Fiber optics sensors, Sensing systems, Temperature metrology, Temperature sensors, Optical fibers, Thermal analysis, Aluminum, Fiber optics, Computing systems

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Proceedings Article | 10 April 1996 Paper

Expert system for neurosurgical treatment planning

Andrew Cheng, Sally Chung, John Kwok

Proceedings Volume 2653, (1996) https://doi.org/10.1117/12.237436

KEYWORDS: Brain, 3D modeling, Tumors, Computed tomography, Image filtering, Neuroimaging, 3D image processing, Magnetic resonance imaging, Systems modeling, Surgery

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Proceedings Article | 6 October 1994 Paper

System Toward Automation in Radiotherapy Treatment: START

Andrew Cheng, Kenneth Tsoi

Proceedings Volume 2355, (1994) https://doi.org/10.1117/12.189053

KEYWORDS: Computing systems, Sensor fusion, Robotic systems, Cancer, Image analysis, 3D image processing, Radiotherapy, X-rays, Computer aided design, 3D modeling

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Proceedings Article | 16 September 1992 Paper

Neural net classifier for satellite imageries

S. Hung, Andrew Cheng, Victor Lee

Proceedings Volume 1709, (1992) https://doi.org/10.1117/12.140005

KEYWORDS: Clouds, Artificial neural networks, Satellites, Neural networks, Satellite imaging, Earth observing sensors, Meteorological satellites, Network architectures, Infrared imaging, Spatial resolution

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Proceedings Article | 26 March 1992 Paper

Comparing composite materials with structural steels in the design of the optical support structure of very large telescopes

Andrew Cheng, Robert Li

Proceedings Volume 1618, (1992) https://doi.org/10.1117/12.58048

KEYWORDS: Composites, Carbon, Structured optical fibers, Large telescopes, Optical instrument design, Optical design, Glasses, Finite element methods, Epoxies, Telescopes

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Proceedings Article | 1 June 1991 Paper

Microcomputer-based image processing system for CT/MRI scans: II. Expert system

John Kwok, Peter Yu, Andrew Cheng, Wai-Chin Ho

Proceedings Volume 1445, (1991) https://doi.org/10.1117/12.45241

KEYWORDS: Image processing, 3D image processing, 3D image reconstruction, Brain, Neuroimaging, Computed tomography, Image enhancement, Databases, 3D modeling, Tumors

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Proceedings Article | 1 May 1991 Paper

Microcomputer-based image processing system for CT/MRI scans: hardware configuration and software capacity

Andrew Cheng, Wai-Chin Ho, John Kwok, Peter Yu

Proceedings Volume 1444, (1991) https://doi.org/10.1117/12.45192

KEYWORDS: Image processing, 3D image processing, Image enhancement, Image analysis, Photography, Image compression, 3D image reconstruction, 3D modeling, Image storage, Data archive systems

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Showing 5 of 24 publications

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