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Your search keyword '"MA, Chun-sheng"' showing total 166 results
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166 results on '"MA, Chun-sheng"'

31. Influence of solid lubricant WS2 on the tribological properties of plasma electrolytic oxidation coating of ZL109

Author

Fu Jing-guo, Ma Sheng-lin, Xu Chang-qi, Cheng Dong, Zhu Xinhe, Ma Chun-sheng, and Yan Zhijun

Subjects
Biomaterials, Materials science, Polymers and Plastics, Coating, Chemical engineering, Metals and Alloys, engineering, Tribology, Plasma electrolytic oxidation, engineering.material, Lubricant, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials
Published
2020

33. Non-collinear double QPM optical parametric amplification using periodically poled RbTiOAsO4

Author

Zhang Wei quan, Shi Yong feng, Li xiao yun, and Ma Chun sheng

Subjects
Materials science, business.industry, Poling, Pulse duration, Grating, Signal, Optical parametric amplifier, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials, Wavelength, Double phase, Optics, Electrical and Electronic Engineering, Physical and Theoretical Chemistry, business, Phase matching
Abstract

The tuning characteristics of non-collinear double QPM (NDQPM)optical parametric amplification with single periodically poled RbTiOAsO 4 (PPRTA) for the pump 526 nm and 800 nm have been investigated theoretically. The double phase matching can be realized over wider regions of the mid-infrared when grating period Λ is selected properly. The combination of temperature tuning and poling period tuning enables a very wide quasi-continuous wavelength tuning range. The tolerance parameters of non-collinear angles, poling period, signal wavelength and phase matching temperature are investigated theoretically. The study shows that the poling period tolerance and the temperature tolerance of PPRTA are lager than that of PPKTP for the pump 526 nm. Angle tuning range, broadband tuning range and temperature tuning range of PPRTA are also larger than that of PPKTP for the pump 526 nm. The output pulse duration of PPRTA is shorter than that of PPKTP for pump 526 nm. Hence, PPRTA is an excellent periodically poled material. But both angle tolerances are all very small, and it is very important to keep the accurate non-collinear angles in experiment.

Published
2013

37. The design of automatic control system of auxiliary heating device in thermostatic tank

Author

Zhang Zhimin and Ma Chun-sheng

Subjects
Engineering, Temperature control, Automatic control, business.industry, Control theory, Control system, Process control, Hardware_PERFORMANCEANDRELIABILITY, Auxiliary heating, Fuzzy control system, business, Constant (mathematics)
Abstract

For the requirements of constant temperature on device, that completes high-precision automatic system control through the fuzzy-PID hybrid control technology, by AT89C52 as the control center. The results show that the tank temperature stable operation, the system under constant temperature control accuracy ± 0.1, to meet the design accuracy.

Published
2011

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