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	Parameter optimization of passive dynamic walking biped with knees (EI CONFERENCE) 会议论文 OAI收割 2012 2nd International Conference on Materials Science and Information Technology, MSIT 2012, August 24, 2012 - August 26, 2012, Xi'an, Shaan, China 作者: Zhang P. 收藏 \| 浏览/下载：26/0 \| 提交时间：2013/03/25 A method to find the optimized parameter values of passive dynamic walking biped is presented. The effects of biped physical parameters on the stability property of passive gaits are studied by simulation experiments. The chosen parameters include the mass distribution length of leg and slope angle. The stability property of passive walking limit cycles is used as criterion of optimization calculation including the orbital stability described by eigen-values of linearized Poincare map and the global property described by size of attraction region. The simulation results show how the stability of limit cycle varies when physical parameters of the passive biped change. The work is useful to explore the inherent property of passive dynamic walking and can be used as an important instruction in the mechanical design of biped robots based on principle of passive dynamic walking. (2012) Trans Tech Publications Switzerland.
	An embedded infrared image enhancement system based on DSP and FPGA (EI CONFERENCE) 会议论文 OAI收割 2012 International Conference on Manufacturing Engineering and Process, ICMEP 2012, April 21, 2012 - April 22, 2012, Kunming, China 作者: Zhang T. 收藏 \| 浏览/下载：50/0 \| 提交时间：2013/03/25 According to the disadvantage of the large noises of histogram equalization algorithm a new adaptive image enhancement algorithm is presented. First the statistical histogram of the infrared image is done. Then the threshold of plateaus Equalization is calculated and the statistical histogram is modified. Finally the bright values of the pixels of the image are changed. An embedded high speed image enhancement processing system on high performance DSP TMS320DM642 and FPGA was designed. Experimental results with real images shown that the system can improve the contrast of the infrared image limit the noises of the enhancement image and effectively enhance the infrared image the running time of the program is shorter so it can meet the requirements of real-time in the project. (2012) Trans Tech Publications.
	Estimation of maximum inclusion size and fatigue strength in high-strength ADF1 steel 期刊论文 OAI收割 Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing, 2005, 卷号: 394, 期号: 1-2, 页码: 126-131 J. M. Zhang; J. F. Zhang; Z. G. Yang; G. Y. Li; G. Yao; S. X. Li; W. J. Hui; Y. Q. Weng 收藏 \| 浏览/下载：22/0 \| 提交时间：2012/04/14 high-strength steel size of maximum inclusion statistics of extreme values generalized Pareto distribution fatigue strength generalized pareto distribution clean steels quantitative-evaluation quality-control extreme values statistics defects prediction limit
	Limit values of derivatives of the cauchy integrals and computation of the logarithmic potentials 期刊论文 OAI收割 COMPUTING, 2004, 卷号: 73, 期号: 4, 页码: 295-327 作者: Xu, Y; Chen, HL; Zou, Q \| 收藏 \| 浏览/下载：23/0 \| 提交时间：2018/07/30 Cauchy integrals limit values logarithmic potentials singular integrals numerical evaluation of logarithmic potentials