一种直流力矩电机跑合防堵转控制电路

本文介绍了一种力矩电机跑合防堵转控制电路。作者对该电路的原理、使用和调试以及实验结果进行了描述。     

Hopping on Even Ground and Up Stairs with a Single Articulated Leg

This paper presents a method for generating gaits for a one-legged articulated hopping robot. A static optimization procedure produces the initial joint velocities for the flight phase, using the principle of conservation of angular momentum and assuming (nearly) passive flight. Two novel objective functions for this static optimization enable one to choose different gaits by simply changing a few parameters. A dynamic optimization procedure yields a solution for the flight trajectory that minimizes control effort. The stance phase (when the foot is touching the ground) becomes a standard two point boundary value problem, also solved with a dynamic optimization procedure. During the stance phase, the physical joint limitations, ground reaction forces, and the trajectory of the zero-moment point all constrain the solution. After these single-phase optimizations, a complete-cycle optimization procedure, incorporating both flight and stance phases, further reduces the control effort and balances the motion phases. In simulation, the leg hops on even ground and up stairs, exhibiting energy-efficient and intuitively satisfying gaits.     

8B10B编解码器在PCI Express总线中的实现

本文在深入研究8B10B编、解码原理的基础上,利用其DWS特性,用Verilog HDL语言实现编、解码算法的描述,并通了modelsim仿真.在ISE9.1i平台上综合后下载到FPGA上实现具体的硬件电路,同时分析了系统各项性能.在PCI Express总线上,实现了一个性能良好的8810B编解码系统,它具有很好的可移植性以及一定的实用价值.     

一种调和序列生成及其在故障定位中的应用

为了提高软件的可靠性,在软件运行发生故障时,快速、准确地定位故障点成为非常有意义的研究课题。与以往方法不同,在将故障运行序列和最部近运行序列进行差异对比前,为了避免选取第一条最近成功路径时引起的“盲区”使得后期搜索空间加大,引入了生物学基因序列比对原理,对最部近运行序列不是通过编辑距离比较进行选取,而是通过一条调和序列进行处理。实验表明,方法的故障定位效果较好。     

Meta-heuristic algorithms for parameter estimation of semi-parametric linear regression models

Consider the semi-parametric linear regression model Y=β^′X+ε, where ε has an unknown distribution F₀. The semi-parametric MLE of β under this set-up is called the generalized semi-parametric MLE(GSMLE). Although the GSML estimation of the linear regression model is statistically appealing, it has never been attempted due to difficulties with obtaining the GSML estimates of β and F until recent work on linear regression for complete data and for right-censored data by Yu and Wong [2003a. Asymptotic properties of the generalized semi-parametric MLE in linear regression. Statistica Sinica 13, 311-326; 2003b. Semi-parametric MLE in simple linear regression analysis with interval-censored data. Commun. Statist.—Simulation Comput. 32, 147-164; 2003c. The semi-parametric MLE in linear regression with right censored data. J. Statist. Comput. Simul. 73, 833-848]. However, after obtaining all candidates, their algorithm simply does an exhaustive search to find the GSML estimators. In this paper, it is shown that Yu and Wong's algorithm leads to the so-called dimension disaster. Based on their idea, a simulated annealing algorithm for finding semi-parametric MLE is proposed along with techniques to reduce computations. Experimental results show that the new algorithm runs much faster for multiple linear regression models while keeping the nice features of Yu and Wong's original one.     

MATLAB程序在VC环境中的编译和运行

介绍MATLAB程序在VC环境中编译运行的方法。     

封闭式高压开关柜运行环境模糊监控系统的探讨

本文介绍济钢的中置式封闭开关柜运行环境监控系统，解决了因为没有先进有效的监控手段，避免了封闭开关柜因为通风散热差而引起设备事故的发生。     

电力负荷参数记录与监控系统的开发与应用

介绍了电力负荷参数记录与监控系统的组成、原理、功能以及软、硬件的开发过程。该系统通过对用电单位的用电状况进行实时监测，为用电部门提供电网运行数据。对如何抑峰填谷、科学用电、提高用电管理水平等方面具有重要意义。系统投入运行后表明：系统运行安全可靠，功能强大，电力数据采集全面、准确，社会效益和经济效益显著。     

单向可控硅在杂物电梯运行控制中的应用

单向可控硅用作静态直流开关时,其开关特性具有信息记忆功能。据此,以单向可控硅及其触发信号控制电路,关断信号控制电路,负载(功率继电器)和其它元件,组成了一种适用于杂物电梯运行控制要求的电控系统,已成功地应用于该类电梯中.就线路的基本工作原理,系统的设置与功能等方面进行了详细的阐述,并对线路设计中的一些重要技术问题进行了必要的说明。