电网参量的无纸记录仪

介绍了一种新型的三相电参量无纸记录仪，该记录仪采用复序列FFT变换算法对电网谐波的电流、电压、有功功率、无功功率和功率因数进行计算、分析、显示．记录仪在硬件上以TI公司的DSP芯片TMS320LF2407为核心处理器；在软件上以实时多任务操作系统μC／OS-Ⅱ为系统运行的软件平台，使系统具有很好的实时性、稳定性、可靠性。     

An Optimization Design of a Weft Insertion Mechanism for Rapier Looms

By analyzing a combined and spatial 6-bar linkage weft insertion mechanism, its practical model for optimization design is set up and the modification of penalty strategy is put forward so that the genetic algorithm can be better used in optimization design for mechanisms with non-linear constraints. The design result is discussed.     

Fashion CAD Based on Draping Knowledge

A computer-aided design system, which is base on the knowledge of draping and frame-producer methods, is put forward. All kinds of knowledge applied here are abstracted from fashion design, where a complicate object is divided into several simple parts according to the body parts. And then a mathematical model of the display for real fashion illustration is elucidated.     

Investigation of the Reaction Mechanism of Itaconic Acid/Maleic Acid Copolymer System and Cotton Cellulose

The reaction mechanism of IA/MA copolymer system andcotton cellulose is conjectured and verified, the two keysteps, such as the formation of cyclic anhydride interme-diates and the building of ester crosslinklng, and the ef-fect of sodium hypophosphite are especially emphasized,by FT - IR spectroscopy and acid- base titration anal-yses. The experiments reveal that carboxylic acids main.ly change to cyclic anhydride in the pre - drying step andSodium Hypophosphite (SHP) has effect on it, but mostester - crosslinkages are built in the curing step and SHPhas effects on both anhydride formation and ester -crosslinking formation.     

Digital Jacquard Fabric Design in Colorful Mode

IntroductionNowadaystheJacquardmachinehasbeendevelopedintoanelectronicformwithcomputercontrol,andNetcommunicationiswidelyusedinJacquardweavingsheds.Ontheotherhand ,theJacquardtextileCADsystemdevel opedquicklyasaresultoftheadvanceincomputertech nology .TheadvanceofJacquardtextileCADischangingthemethodofJacquardtextiledesign ,andguidingthenewconceptofJacquardfabricdesign ,whichfollowsthedirec tionofresearchondigitaltextile[1] .Inaddition ,thescienceofdigitaltechnologybasedonthebinarysystem…     

神经网的自适应学习准则及其算法

无教师学习网络具有较强的自适应学习能力。本文讨论神经网的自适应学习准则，包括误差平方和准则，相关准则和模糊熵准则，同时给出相应的学习算法。     

Information Technology and Paradigm Shifting in Organizational Structure and Strategy

This paper examines the impacts of information technology (IT) on LDCs' competitive condi     

基于WEB的零件库发展现状分析

基于Web的零件库对于实现大批量定制具有重要意义。本文介绍了国内外基于Web的零件库的发展现状，比较了一些基于Web的零件库，对如何发展适合我国现状的Web零件库提出了建议。     

基于多智能体的自主驾驶车辆仿真调试系统

自主驾驶车辆系统是一个集环境感知、规划决策、自动驾驶等多种功能于一体的综合系统 .为方便对系统进行调试和分析 ,设计和开发了该系统的可视化仿真调试系统 .实验结果表明了该系统的有效性 .     

工程结构分析的虚拟结构法

提出的虚拟结构法旨在解决形状不规则结构件的力学分析问题．虚拟一个形状规则的结构体,包容着不规则结构件;将虚拟结构边界上的虚拟力作为待定的未知量,通过控制方程和调整虚拟力的值,利用第一类数学规划加权残值法,使不规则结构的控制方程和边界条件得到满足．工程结构分析的虚拟结构法,实际上是加权残值配点法和线性规划法相结合的方法,是一种半解析方法．该方法应用于两个工程实际问题,计算结果表明,能很好地解决形状不规则结构的力学问题,是工程结构分析的一种有效方法．