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Your search keyword '"Feng, Xianghua"' showing total 38 results
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38 results on '"Feng, Xianghua"'

9. Diffraction field simulation of polymer waveguide grating coupler

Author

冯向华 Feng Xianghua, 吴天昊 Wu Tianhao, 卫正统 Wei Zhengtong, and 吴少强 Wu Shaoqiang

Subjects
Diffraction, Materials science, Optics, Space and Planetary Science, business.industry, Aerospace Engineering, Electrical and Electronic Engineering, Grating, Field simulation, Polymer waveguide, business, Atomic and Molecular Physics, and Optics
Published
2019

18. The measurement and analysis of radiated power for program control mini-switchboard

Author

Feng Xianghua, Miao Jinsong, Xu Daopeng, and Zhou Changlin

Subjects
Engineering, Equipment under test, Telephone equipment, Frequency band, business.industry, Electrical engineering, Free space, Effective radiated power, business, Tem cell, Radiated emission, Program control
Abstract

This paper briefly presents the electromagnetic radiated emission mechanism of a program control mini-switchboard and the principle method of measurement of radiated emission using a TEM cell. It gives the calculating formulas of the equivalent radiated power of the equipment under test (EUT) in free space. It also gives the emission measurement result of a CLT-8 program control mini-switchboard in the frequency band 0.15 MHz/spl sim/30 MHz and gives further analysis.

Published
1997

26. Fabrication of Modified Polydimethylsiloxane and Multimode Optical Waveguides

Author

冯向华 Feng Xianghua, 窦文华 Dou Wenhua, and 季家镕 Ji Jiarong

Subjects
chemistry.chemical_compound, Materials science, Multi-mode optical fiber, Fabrication, Polydimethylsiloxane, chemistry, business.industry, Optoelectronics, business, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials
Published
2012

27. Bending Loss of Polysiloxane Optical Waveguides for Optical Interconnection

Author

冯向华 Feng Xianghua, 季家镕 Ji Jiarong, and 窦文华 Dou Wenhua

Subjects
Materials science, Optical interconnection, business.industry, Optoelectronics, Bending, business, Waveguide (optics), Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials
Published
2012

32. Theoretical Analysis of Propagation Loss of Rib Waveguide

Author

温昌礼 Wen Changli, 季家镕 Ji Jiarong, 窦文华 Dou Wenhua, 冯向华 Feng Xianghua, and 宋艳生 Song Yansheng

Subjects
Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials
Published
2011

37. Photodegradation of 17β-estradiol in water by UV–vis/Fe(III)/H2O2 system

Author

Feng, Xianghua, Tu, Jianfeng, Ding, Shimin, Wu, Feng, and Deng, Nansheng

Subjects
*ESTRADIOL, *HYDROGEN-ion concentration, *IRRADIATION, *CHEMICAL kinetics
Abstract

Abstract: Photodegradation of 17β-estradiol (E2) in aqueous solutions by UV–vis/Fe(III)/H2O2 system, namely Photo–Fenton system, was preliminarily investigated under a 250W metal halide lamp (λ ≥313nm). The influences of initial pH value, initial concentration of H2O2 and E2 on photodegradation efficiency of E2 were discussed and the amount of CO2 produced by the photodegradation reaction was measured. The results indicates that E2 could be decomposed efficiently in UV–vis/Fe(III)/H2O2 system. Under the condition of 10.0μmolL−1 Fe(III), 1000μmolL−1 H2O2 and pH 3.0, the degradation efficiency of 18.4μmolL−1 E2 reach 75.2% after the irradiation of 160min. Over the range of pH 3.0–6.0, the higher acidity, the higher the degradation efficiency of E2 and initial reaction rate are. The degradation efficiency of E2 increases with increasing of initial concentration of H2O2 and with decreasing of initial concentration of E2. The E2 mineralization efficiency increases with reaction time but the mineralization efficiency was lower. When the initial concentration of Fe(III) and H2O2 were 10.0 and 1000μmolL−1, respectively, the mineralization efficiency of 18.4μmolL−1 E2 solution with pH 3.0 was only 21.6% after 160min irradiation. It is suggested that the mineralization occurred probably only at aromatic ring. [Copyright &y& Elsevier]

Published
2005
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