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VrML三维模型局部简化软件的设计与实现

计算机工程与应用 2004年第26期40卷 117-119,135页

作者：贾世祥刘方敏俞建新南京大学软件新技术国家重点实验室南京大学计算机系南京210093

在VrML中使用Shape节点构建造型,一个复杂VrML模型通常由多个造型组成。论文分析了VrML中Shape节点内部的数据组织形式以及多个Shape节点之间的层次结构,提出了相应的数据结构,并讨论了如何在此数据结构上实现以造型为单位对VrML模型进... 详细信息

在VrML中使用Shape节点构建造型,一个复杂VrML模型通常由多个造型组成。论文分析了VrML中Shape节点内部的数据组织形式以及多个Shape节点之间的层次结构,提出了相应的数据结构,并讨论了如何在此数据结构上实现以造型为单位对VrML模型进行局部简化的软件。

关键词：局部简化边折叠折叠代价

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常用预测方法及评价综述

四川师范大学学报（自然科学版） 2002年第1期25卷 70-73页

作者：程昳四川师范大学数学与软件科学学院四川成都610066

科学的预测是正确决策的前提和依据 .介绍了回归分析方法、神经网络方法、组合预测方法等预测方法 ,还介绍了利用模糊综合评判来评价预测方法以辅助预测者选择预测方法 .

关键词：回归分析神经网络组合预测预测方法模糊综合评判粗糙集

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智能脱扣器的研究

沈阳工业大学学报 2001年第3期23卷 196-199页

作者：夏天伟任继武李海波沈阳工业大学电气工程学院辽宁沈阳110023

断路器是用于电力系统中接通、分断线路及对各种故障进行保护控制的一种开关电器，智能脱扣器是智能型断路器的重要组成部分 .智能型断路器不仅具有过载、短路、漏电、接地等故障的保护功能，同时具有显示、存储、记忆、逻辑分析、判... 详细信息

断路器是用于电力系统中接通、分断线路及对各种故障进行保护控制的一种开关电器，智能脱扣器是智能型断路器的重要组成部分 .智能型断路器不仅具有过载、短路、漏电、接地等故障的保护功能，同时具有显示、存储、记忆、逻辑分析、判断和选择等功能 .采用网络通信技术，可使多台智能型断路器组成智能供配电系统，使之具有“四遥 ”功能 .通过对系统故障的分析，确定了智能脱扣器的设计原理、工作原理及多台断路器联网保护原理；确定了智能化技术的构成 .在此基础上进行了硬件线路和软件系统的设计；给出了保护动作特性，并分析了智能脱扣器的技术特点 .

关键词：断路器智能脱扣器硬件设计软件设计

SYSTEM MODELING AND OpTIMIZATION OF A p.r. SYSTEM WITH DIFFErENT SHIp'S KINDS

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Systems Science and Mathematical Sciences 1993年第4期6卷 296-311页

作者： YUE Wuyi GU Jifa NIE Jiayu HU pingxian Advanced softwar. technology ＆ Mechatronics research Institute of Kyoto,Kyoto Japan Institute of Systems Science,Academia Sinica,Beijing 100080,China Water Transp.r.ation Institute, The Ministry of Communications prC, Beijing 100088, China Dep.r.ment of Applied Math., Faculty of Sciences, Konan university, Kobe 658, Japan Advanced softwar.technology & Mechatronics research Institute of Kyoto 日本中科院系统科学所北京交通部水运所北京

The analysis and evaluation of an actual p.r. system containing r differentship’s kinds and N subsystems each of which consists of M.(i=1, 2,…, N) p.r.s arederived. The external arrivals of ships to the system come from r different poisson sourcesand the interarrivals to the queue of each p.r. of a subsystem are determined according tocondition probabilities. Each p.r. has multiple berths whose service times are distributedaccording to Erlang probability distribution functions. Each p.r. of a subsystem has rinfinite capacity buffers for storing ships interarrived. This method provides a good ap.r.ximation procedure for obtaining system p.r.or-mance measures such as waiting times of ships, average queue lengths, etc. Optimum p.r.capacity can thus be evaluated by using this analysis. A simulation is also presented totest this ap.r.ximate analysis, and a good agreement is observed. This model shall be usedin the planning of several actual p.r. systems. Through the application of this model, itis possible to analyze and evaluate p.r.ormances of the systems.

关键词： p.r. system queueing network simulation and optimization

3. Design and Analysis of Crushing roller of High-pressure Grinding roller

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厦门大学学报（自然科学版） 2002年第S1期41卷 158-页

作者： GAO Hang 1, QU Li-gang 2 (1. school of Mechanical Engineering and Automation, Northeastern university, Shenyang 110004, China 2. Dep.r.ment of Mechanical Engineering, Shenyang Institute of Aeronautical Engineering, Shenyang 11003., China)

Crushing roller is one of the main p.r.s of High-p.r. ssure Grinding roller, which is a kind of high efficient ore crushing equipment. A kind of assembled roller, which is more convenient to renovate worn surface b y simply replacing segmented surface of the roller, was developed. The structura l models of assembled roller’s components were designed with SolidWorks softwar.e based on feature modeling, these solid models of the roller were virtually ass embled. Through this work, not only was the assemble interference checked out so as to examine validity of the structure design, but also these solid models cou ld be recognized by COSMOS/Works softwar., through which the finite element an alysis can be done. Then the stress and displacement of the main shaft and sur face segment in two different working states were analyzed and detected quickly according to the analysis results with COSMOS/Works. In conclusion, the optimum clearance of 1.0～2.0 mm between concave-convex studded segments is determined to make the using life of assembled roller longer.

关键词： high-pressure grinding roller 3. design assemb led roller finite element analysis

An Universal Modeling Method for Enhancing the Volumetric Accuracy of CNC Machine Tools

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厦门大学学报（自然科学版） 2002年第S1期41卷 148-149页

作者： FAN Jin-wei, GUAN Jia-liang, WANG Wen-chao, LUO Qi, ZHANG Xiao-long, WANG Ling-yu (Dep.r.ment of Mechanical and Applied Electronic Engineering, Beijing polytechnic university, Beijing 100022, China)

Volumetric error modeling method is an imp.r.ant te ch nique for enhancement the accuracy of CNC machine tools by error compensation. I n the research field, the main question is how to find an universal kinematics m odeling method for different kinds of NC machine tools. Multi-body system theor y is always used to solve the dynamics problem of complex physical system. But t ill now, the error factors that always exist in practice system is still not con sidered. In this pap.r. the accuracy kinematics of MBS (multi-body system) are developed by adding the movement error items and the positioning error items for every couple of adjacent bodies. After make an analysis for different kinds of NC machine tools we can find that NC machine tools can be looked as a kind of sp ecial MBS. It’s main construction only contains two movement branch. the one is from base p.r. to workpiece and the other is from base p.r. to cutter. So an u niversal volumetric error modeling method and the error analysis method for NC m achine tools can be built in this pap.r.based on MBS theory. The essential condi tion for precision machining is derived through mathematics equations and the co ncept of ICCp (inverse changed cutter path ) and ICNI (inverse changed NC instru ction ) are presented in this pap.r. The numerical solution methods for ICCp and ICNI are also given in this pap.r.which can be directly used to enhance the mac hining accuracy of NC machine tools. In order to verifying the above works, the double frequency laser interface detecting instrument of rENISHAW is used to mea sure the error p.r.meters of the MAKINO 3.axis NC machine tools and the softwar.es are developed using C++ developing language to simulate the cutte r trail under different kind conditions in the computer. Latterly the standard w ork p.r.s are selected to be machined on the MAKINO 3.axis NC machine tools bef ore and after use the above mentioned error compensation method respectively. Th e simulation and exp.r.me

关键词： error compensation NC machine multi-body syste m

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MATLAB在环境评价和规划中的应用

四川环境 2003年第3期22卷 61-65页

作者：陆志波陆雍森同济大学环境科学与工程学院上海200092

本文简述了MATLAB软件的由来和发展 ,介绍了其主要功能及优点。主要通过在环境评价与规划中的应用实例 ,展示其在环境科学研究中的应用潜力。文中的第一个实例是MATLAB在多项水质参数的综合评价中的应用 ,文中对不同的多项水质参数评价... 详细信息

本文简述了MATLAB软件的由来和发展 ,介绍了其主要功能及优点。主要通过在环境评价与规划中的应用实例 ,展示其在环境科学研究中的应用潜力。文中的第一个实例是MATLAB在多项水质参数的综合评价中的应用 ,文中对不同的多项水质参数评价方法进行了比较 ;另一个实例是MATLAB应用于城市固体废物管理规划 ,极大地提高了规划的水平和准确性 ,提高了工作效率。

关键词： MATLAB 环境评价环境规划环境综合指数