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372 results on '"Liu, Cai‐Xia"'

145. Propagation Characteristics of Nonparaxial Scalar Gaussian Beams

Author

张静 Zhang Jing, 邓小玖 Deng Xiao-jiu, 刘彩霞 Liu Cai-xia, and 牛国鉴 Niu Guo-jian

Subjects
Physics, symbols.namesake, Quantum electrodynamics, Gaussian, Scalar (physics), symbols, Electrical and Electronic Engineering, Atomic and Molecular Physics, and Optics
Published
2010

146. Divergent characteristic of the second order moment of nonparaxial vector beams

Author

Deng Xiao-Jiu, Lai Chuan-wei, Wang Guo-an, and Liu Cai-Xia

Subjects
Moment (mathematics), Angular spectrum method, Diffraction, Transverse plane, Light intensity, Mathematical analysis, Physics::Accelerator Physics, Physics::Optics, General Physics and Astronomy, Order (ring theory), Light beam, Beam (structure), Mathematics
Abstract

Based on the accurate expression of light intensity of nonparaxial vector beams at the transverse plane and the vectorial second order moment theory of light beam propagation，by applying rigorous vectorial diffraction theory of the angular spectrum representation，the nonparaxial propagation of any vectorial diffraction beam has been systemically investigated，the integral expressions of beam width，transversal divergence angle have been presented，and the divergent characteristic of the second order moment of nonparaxial vector beams has been demonstrated. The definitions of beam width，transversal divergence angle of non-paraxial vector beams and some related problems have been discussed.

Published
2009

147. FSM-based method for detecting state mechanism of protocol.

Author

PAN Zhun-yang, LIU Cai-xia, and LIU Shu-xin

Abstract

Detecting the state mechanism of protocol can effectively improve the test comprehensiveness when testing the stability of network. This paper proposed a detection method of the state mechanism of protocol based on finite state machine. First, this method established an FSM model of certain message sending entity of testing protocol and determined the input set. Second, during the test, it monitored state transitions of sending entity and generated a state transition diagram. Finally, it determined the state mechanism of protocol message and defined trigger conditions of stateful message according to the state transition diagram. It determined the state mechanism of protocol after summarizing and classifying the tested messages. This paper built a lab environment to test and verify the effectiveness of this method. [ABSTRACT FROM AUTHOR]

Published
2015
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