用改进激活集合法优化VLSI互连线

本文介绍离散线宽的单根互连线时延优化的一种算法：改进激活集合法(MASM)。基于Elmore时延模型，单根互连线的优化问题能被表述为凸二次规划，能在多项式时间里求解，得到最优结果。它是一种非常高效的算法．计算结果证明了此算法的有效性。     

LC19离子注入机控制方法及主控制器原理分析

为了使离子注入机满足生产线工艺的要求，控制系统的设计必须使控制功能完善、控制命令响应迅速、命令执行准确可靠、异常处理迅速有效和整机工作稳定可靠。LC19离子注入机控制系统采用主从集中式控制方法，较好地解决了控制功能复杂与控制系统反应迅速、高效、稳定、可靠之间的矛盾。其主控制器的设计采用双端口存储器传递主控制计算机的命令，实现对各子控制系统的控制，其原理简单，但很好地解决了主从式集中控制方法中信息高速传递的难题。计算机与主控制器间采用8位总线送数，主控制器与子控制器之间采用高速串口送数。主控制计算机可向双端口存储器的A，B两区交替发送命令。而且，主从控制器之间采用了巧妙的通讯监控方法，一旦发生通讯故障，子控制器就会清“0”复位，避免机器失控。介绍了主从式集中控制的硬件及其特点，分析了主控制器的设计原理，说明了其软件流程，简述了其调试结果。     

Ab-initio Hartree-Fock self-consistent-field calculations—An indigenous development of computer programs

A set of indigenously developed computer programs for ab-initio Hartree-Fock calculations on both closed- and open-shell molecules have been described. These programs have been written for calculations using GTO basis sets. Integral formulae have been taken from Taketaet al [8]. Structures and functions of the programs have been discussed. These programs have been extensively tested. Molecular integrals over GTO basis sets have been chosen for tests and as numerical examples in this paper. Results of calculations using very accurate minimal bases have been given for methane. Time taken for these computations in a CDC Cyber 180/840 machine has been indicated. Trends in the calculations have also been illustrated by employing 4-gaussian expansions for the STO’s and by varying the basis size for LiH and BH⁺. An erratum to this article is available at .     

A computer program for the optimal ion chromatographic determination of anions in waters

Summary A general form of computer program which can assist in method development for any natural water has been developed. Necessary input data, sequence of main operations, necessary mathematical relationships and the output data are specified. The development of the structure of the computer program was based on experiences with real samples.     

行波管电子光学系统CAD技术进展

介绍了行波管电子光学系统CAD技术的基本原理和主要方法，并对国内外的发展进行了综述，同时分析了当前该领域的发展方向，为我国自主开发行波管电子光学系统软件提供一些建议供同行们参考。     

NT驱动程序开发

主要讨论了WindowsNT操作系统的特点和体系结构,描述了NT下驱动程序的类型,着重论述了内核模式驱动程序的特点及开发流程,讨论了NT驱动程序的关键模块的结构,并给出了0550-PIO板的驱动程序实例。     

Necessary and sufficient optimality conditions for mathematical programs with equilibrium constraints

In this paper we consider a mathematical program with equilibrium constraints (MPEC) formulated as a mathematical program with complementarity constraints. Various stationary conditions for MPECs exist in literature due to different reformulations. We give a simple proof to the M-stationary condition and show that it is sufficient for global or local optimality under some MPEC generalized convexity assumptions. Moreover, we propose new constraint qualifications for M-stationary conditions to hold. These new constraint qualifications include piecewise MFCQ, piecewise Slater condition, MPEC weak reverse convex constraint qualification, MPEC Arrow-Hurwicz-Uzawa constraint qualification, MPEC Zangwill constraint qualification, MPEC Kuhn-Tucker constraint qualification, and MPEC Abadie constraint qualification.     

有线电视可寻址收费系统终端控制器原理及程序设计

系统地介绍有线电视可寻址收费系统终端控制器的原理及程序设计方法，主要内容为可寻址收费系统的系统集成、终端控制器的电路原理及程序设计等，使读者系统地了解可寻址收费系统的工作原理及计算机通信方面的相关技术。     

GPIB测试母线在数据传输电路的应用

介绍了GPIB通用接口母线的特点及其优势,将其应用于单片机USB-GPIB框架的数据传输系统,其中USB部分Cypress公司基于2.0协议的CY68013控制芯片,GPIB协议部分采用NI公司的NAT9914控制芯片。     

基于PLC的物料包装输送监控系统

物料输送广泛应用于产品包装、流水作业、检测等相关行业中,对监控系统的准确性、可靠性以及自动化水平都有很高的要求.根据物料输送系统的实际需要提出了基于PLC和WinCC人机界面软件的硬件结构、控制思想和软件设计.系统已在内蒙古天野化工化肥传输自动控制中使用,整个系统组网方便、运行可靠,达到并满足设计的目的和要求.