中国人口、能源、经济发展的环境影响通径分析

提出采用多元通径分析的数学模型,定量分析我国人口数量、经济发展水平、能源资源消费对环境污染造成的直接和间接影响,并设计了这一方法的应用步骤.计算结果表明,现阶段我国庞大的人口数量和以煤炭为主的能源资源消费结构是造成我国环境污染的主要根源.     

基于EERD的建模CASE工具的体系结构

基于EERD建模的CASE工具主要是针对数据库应用的开发，它可以提高数据库应用的开发效率和正确性。主要对CASE工具应具有的基本体系结构及其功能进行了介绍，并对其实现技术等问题进行了详细阐述，最后综合多种流行的CASE工具，给出了CASE工具本身的数据字典的概念数据模型的整体结构，并对组成概念数据模型的模型元素间的关系进行了分析说明。     

线性再励的自适应变步长机器人神经网络路径规划算法

研究已知障碍物形状和位置环境下的机器人全局路径规划问题。利用神经网络路径规划算法进行路径规划，为提高神经网络路径规划算法的收敛速度，表明所给出的线性再励自适应变步长算法能够有效地加快路径规划的收敛速度。     

浅谈CAI课件技术设计

对利用多媒体开发工具及图像处理工具制作多媒体教学课件进行了介绍，重点介绍了在开发《微机原理及应用》CAI课件过程中的一些技术特点，并对利用Authorware等开发工具制作CAI课件的方法和技巧谈了自己的经验和体会。     

无约束最优化的共轭梯度路非单调信赖域算法

提供了无约束最优化问题的共轭梯度路径非单调信赖域算法。进而获得了共轭梯度路的一些重要性质。基于这些性质和一些合理的假设，证明了算法具有整体收敛性和保持局部超线性收敛速率。     

具有转动弹性支承杆的热弹性过屈曲分析

基于轴线可伸长杆的几何非线性理论,建立了两端为转动方向弹性约束杆的热屈曲控制方程.该问题是包含杆轴线弧长在内的多未知函数的强非线性两点边值问题,无法求其解析解.本文采用打靶法得到了该问题的数值解,给出了具有不同长细比?不同弹性支承系数杆的热过屈曲平衡路径和平衡构形.     

用最短路径法求关键路线及其SAS的实施

利用网络工程的关键路线为耗期最长的特点，将其按照一定的规则转化成最短路径问题，然后利用求最短路径的SAS程序，顺利地求出网络工程的关键路线。     

Improvement of Electrochemical Machining Accuracy by Using Dual Pole Tool

Electrochemical machining (ECM) is one of the best al ternatives for producing complex shapes in advanced materials used in aircraft a nd aerospace industries. However, the reduction of the stray material removal co ntinues to be major challenges for industries in addressing accuracy improvement . This study presents a method of improving machining accuracy in ECM by using a dual pole tool with a metallic bush outside the insulated coating of a cathode tool. The bush is connected with anode and so the el...     

Method of Monitoring Wearing and Breakage States of Cutting Tools Based on Mahalanobis Distance Features

The Mahalanobis distance features proposed by P.C.Mahalanobis, an Indian statistician, can be used in an automatic on-line cutting tool condition monitoring process based on digital image processing. In this paper, a new method of obtaining Mahalanobis distance features from a tool image is proposed. The key of calculating Mahalanobis distance is appropriately dividing the object into several component sets. Firstly, a technique is proposed that can automatically divide the component groups for calculati...     

Study on Production of Rubber Sealing Strips with Steel Bones

Rubber sealing strips with steel bones are used in car manufacturing that produced in large quantities. Cutting processes, such as milling and punching, are needed when the strips are produced. Accuracy, smoothness and flatness of the machined surface have to be guaranteed in the cutting process; moreover, deformation of the steel bone and peeling-off of the rubber must be avoided. Therefore cutting action of rubber/steel strips differs from that of rubber or metal workpiece separately. In this paper, milli...