Skeleton chain coding for Chinese characters

The compression of Chinese characters is very important for Chinese office automation and desktop publishing. In this paper, various methods are used to compress 13,051 Chinese characters losslessly by coding their skeleton points. The skeleton points are composed of isolated points and curves. To trace every point in a curve once and consecutively is a NP problem. Therefore, we use contour path following and revisiting algorithms to trace skeleton curves with chain codes. The remaining isolated skeleton points are encoded by an Elias code. Our coding method has a better compression rate than that of conventional skeleton coding.     

Trade-offs in scan path and BIST implementations for RAMs

In this article we propose efficient scan path and BIST schemes for RAMs. Tools for automatic generation of these schemes have been implemented. They reduce the design effort and thus allow the designer to select the more appropriate scheme with respect to various constraints.     

影响磁式TIMS测量准确度的主要因素

测量准确度是热电离质谱 ( TIMS)的重要指标 ,对于使用年限较长的 TIMS,造成准确度下降的因素很多 ,分析判断更复杂。为了准确、系统地了解其中的主要原因 ,本文从 TIMS的基本工作原理出发 ,对影响测量准确度的主要因素 ,如离子束的角分散、能量分散、电磁场稳定性、多接收器的形变和位移、电子倍增器的衰老和放大器增益的差异等及相应的解决办法作了较深入的探讨     

计算机在路桥工程设计中的应用

通过介绍各种计算机新技术对路桥工程设计软件的影响。阐明了新技术给传统工程设计带来的变革。鼓励人们通过不断学习，应用新技术来提高设计效率与质量。     

“仪表系统接地设计规定”介绍

概述“仪表系统接地设计规定”（2000版）的内容，重点介绍等电位联结的接地方式及其特点。     

如何正确地提高轧机工作机座的刚度

本文着重分析和讨论了提高轧机工作机座刚度的三种途径：　合理提高零部件刚度、短应力线机座、预应力机座。指出某些错误概念与问题，阐述了如何正确地提高轧机工作座的刚度。     

浅谈EPC总承包工程项目质量管理

结合EPC工程项目管理特点，将质量管理的基本要素充分体现在每一个工作环节，确保工程质量符合规程规范和业主质量目标要求，为机组今后正常稳定运行奠定坚实的基础。     

视频压缩系统设计研究

在视频数据通信与传输过程中，视频图象庞大的数据量对系统提出了相当高的要求。一般的通信系统很容易丢失有用的信息，引起视频质量的降低。通过对基于PCI局部总线MPEG图像实时压缩系统的设计与开发，能够较好的解决这一问题。该系统在保证图像质量的基础上能得到较高的压缩比，完全满足视频数据通信与传输的要求。另外本文从软件和硬件两方面就如何解决这一问题给予了相关的压缩算法和设计思想，通过实验很好的论证了这一结论.     

A Unified View on Clustering Binary Data

Clustering is the problem of identifying the distribution of patterns and intrinsic correlations in large data sets by partitioning the data points into similarity classes. This paper studies the problem of clustering binary data. Binary data have been occupying a special place in the domain of data analysis. A unified view of binary data clustering is presented by examining the connections among various clustering criteria. Experimental studies are conducted to empirically verify the relationships.     

Simulation of cup-cone fracture using the cohesive model

The cohesive model is used for the prediction of the crack path during stable crack extension in ductile materials. The problem of crack-path deviation is investigated by means of simulation of crack propagation in a round tensile bar. The respective phenomenon is known as cup-cone fracture. It is shown that the model is able to predict the failure mechanism, which consists of normal fracture in the center and combined normal/shear fracture in the so-called “shear lips” at the specimen’s rim. The damage evolution and crack path predicted by the model are presented. The effect of the normal and shear failure parameters on the crack-deflection point and several aspects of the finite element mesh are discussed.