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Your search keyword '"He Yi-Gang"' showing total 105 results
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105 results on '"He Yi-Gang"'

1. Research on Sliding Mode Control for Steer-by-Wire System in Forklift

Author

Huang Jun-Jie, Xiao Ben-Xian, Liu Yang, and He Yi-Gang

Subjects
Information technology, T58.5-58.64
Abstract

Aiming at steering stability and wheel angle tracking of steer-by-wire (SBW) three wheeled forklift, steering dynamic model and SBW system mathematical model of three wheeled forklift are established. A control strategy for the ideal transmission ratio is introduced based on this model, which ensures forklift steering gain invariant. A sliding mode controller can then be designed based on the bound information of uncertain system parameters, uncertain self-aligning torque, and external disturbances. The results of simulation show the control strategies above can effectively reduce the sideslip angle when the forklift is steering and improve the sensitivity and stability of the steering forklift; at the same time can effectively restrain the parameter perturbation of internal system and external disturbance, which improves the tracking performance of the wheel angle.

Published
2017
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15. Research on the Authentication of Radio Frequency Identification based on the Hash function

Author

Bai Zhi and He Yi-Gang

Subjects
Scheme (programming language), Authentication, General Computer Science, business.industry, Computer science, Hash function, Authentication scheme, Object (computer science), Computer security, computer.software_genre, Identification (information), Radio-frequency identification, business, computer, Protocol (object-oriented programming), computer.programming_language
Abstract

As a kind of accurate, rapid and real – time data acquisitions and processing technology, RFID can give unique identification to entity object, has been widely used in various industries, such as manufacturing, sales, transportation and so on. But with its widely application, many relevant problems, especially the safety issues of RFID system and the low cost issue of label have been raised more and more attention by people; therefore, a new and more appropriate security authentication protocol becomes necessary. In this paper, firstly introducing several now available security authentication protocols, and analyzing their strengths and drawbacks, then proposed a new authentication scheme based on Hash function, doing security properties and feasibility analysis of it in theory, and proving that the security properties of this scheme is more efficient, and it is more applicable to meet the needs of people through test at last.

Published
2015

20. Log-domain wavelet filters

Author

Guan-Qi Guo, Guo-Yun Zhang, He-Yi Gang, and Hong-Min Li

Subjects
Discrete wavelet transform, Computer Science::Hardware Architecture, Wavelet, Lifting scheme, Computer science, Second-generation wavelet transform, Stationary wavelet transform, Electronic engineering, Wavelet transform, Harmonic wavelet transform, Algorithm, Wavelet packet decomposition
Abstract

For applications requiring low-power low-voltage and real-time, a novel analog VLSI implementation of continuous Marr wavelet transform based on CMOS log-domain integrator is proposed. Marr mother wavelet is approximated by a parameterized class of function and with Levenbery-Marquardt nonlinear least square method, the optimum parameters of this function are obtained.The circuits of implementating Marr wavelet transform are composed of analog filter whose impulse response is the required wavelet. The filter design is based on IFLF structure with CMOS log-domain integrators as the main building blocks. SPICE simulations indicate an excellent approximation of ideal wavelet.

Published
2010

41. Weight coefficients applied to eliminate permutation of frequency domain.

Author

CHEN Chao, HE Yi-gang, YIN Bai-qiang, FANG Ge-feng, FAN Xiao-teng, and SHE Kai

Subjects
*FREQUENCY-domain analysis, *PERMUTATIONS, *SIGNAL frequency estimation, *SIGNAL-to-noise ratio, *BLIND source separation, *COEFFICIENTS (Statistics)
Abstract

In order to solve the permutation problem of frequency-domain blind source separation, this paper studied the influence of discontinuity of demixing matrix and distance between frequency bins on permutation problem, and proposed an improved method. It used weight coefficients to represent the influence of each frequency bin to the undetermined frequency bin, and used the demixing matrix of the previous frequency bin to initial the demixing matrix of the latter one. This paper presented the processes of the improved method. The improved method was applied in occasions of instantaneous mixtures, convolutive mixtures and real-room conditions. The results show the proposed method has better signal to noise ratio, speed and stronger robustness, comparing with Murata method. [ABSTRACT FROM AUTHOR]

Published
2014
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