A Heuristic Programming Algorithm for Warehouse Location

A new heuristic programming method of solving a particular type of warehouse location problem is presented. The problem is to allocate K or less facilities to N possible locations so as to service M demand centers at minimum cost. The algorithm presented is suitable for hand calculation of medium-size problems (50 × 50) or when computerized will readily solve large-scale problems of the order of (600 × 600); i.e., 600 demand centers and 600 possible locations.     

A Heuristic Solution Procedure for Linear Programming Problems with Special Structure

A heuristic method is developed for linear programming problems with homogeneous costs in the objective function and upper bounds on the variables. The iterative procedure developed starts with an initial nontrivial feasible solution vector and improves the objective function value at each iteration by improvement on the value of a variable in the solution vector. No artificial or slack variables are used in the solution of the problem. Computational experience with the method and comparison with standard LP codes are presented. Advantages and disadvantages of the method are also discussed.     

在微机上实现制冷工程程序化设计

本文采用A．C．Cleand的制冷剂热力参数曲线拟合方程，选择Quick BASIC编程语言在微机上实现制冷工程程序化设计，程序运行平稳、快捷，方便，实用。与手工计算对比，可提高效率数百倍。     

A Microcomputer Programming System

A programming system is described which provides the software flexibility normally found in minicomputers to microcomputers. With this system, PROM's can be programmed automatically from user written source code.     

面向自动测试系统的图形化编程平台的仪器接口模块的设计

面向自动测试系统的图形化编程平台的出现,为虚拟仪器系统集成工程师们提供了一个图形化的设计环境,可以极大地提高自动测试系统的集成率。     

机器人仿真与离线编程系统

介绍了我们自行研制开发的机器人仿真与离线编程系统软件。该软件为机器人的研究与设计提供了良好的环境，可用于机器人的本体设计、作业单元布局、路径规划与碰撞检验、任务规划与作业任务的离线编程，可实现多个运动机构间的相互通讯，并在屏幕上动态模拟显示整个作业的工作过程。该系统采用全局监控菜单，为用户提供了良好的界面。     

The Role of Spatial Reasoning in Engineering and the Design of Spatial Instruction

Many believe that spatial reasoning and visualization contribute to success in engineering. To investigate this view, we a) studied how students in engineering and engineers in professional practice solved spatial reasoning problems, b) designed and implemented spatial strategy instruction, and c) characterized the impact of spatial instruction on engineering course performance. In the span of 4 years, over 500 students have used our spatial strategy instruction that includes hands-on activities, innovative computer courseware, and problem-solving assessments. We studied 153 students in an introductory engineering course. Overall, students made significant progress in spatial reasoning. In addition, gender differences in the ability to generate orthographic projections on the pre-test disappeared on the post-test. Spatial reasoning ability was a significant predictor of overall course grade, and strong spatial skills were necessary for success on the course exams. Spatial strategy instruction helps students build a repertoire of approaches for engineering problem solving and contributes to confidence in engineering, especially for women. We recommend starting instruction on spatial strategies used by practicing engineers in introductory engineering courses and building on these skills throughout the curriculum.     

基于启发式搜索策略的测试选择问题研究

测试选择是测试性设计的最基本步骤之一，本文通过对其数学模型的研究，构造了衡量测试集优劣程度的启发式函数，并由此实现了一种用于测试选择的遗传搜索算法。实例验证表明了该启发式函数的有效性，为测试性设计提供了一个简单有效的方法。     

民用爆炸物品信息管理系统程序的开发

利用计算机强大的储存、检索、记忆和输出等功能来代替传统的爆炸物品管理模式,可以大大提高爆炸物品的管理效率,降低管理过程中的失误.为了提高爆炸物品的管理水平,利用Visual FoxPro6.0开发了爆炸物品信息管理系统,并对此系统的总体结构和主要的功能模块进行了介绍.     

基于TMS320VC5402的数字图像空间滤波系统设计

针对红外成像观测系统中获取的低信噪比、背景及噪声干扰严重的小目标图像的特点,设 计一种具有保护带(5×5 G)的5×5 Robinson空间滤波器,采用TMS320VC5402进行硬件实现。实验表明,该空间滤波器能够大大提高目标的信噪比,抑制背景和噪声,保证系统实时性要求,很适用于小目标检测。     

Linear Programming Analysis of a Water Supply System

This article discusses the optimization of a water supply system by linear programming. The various formulas used are discussed and a mathematical model is developed. A problem is solved to illustrate the use of the mathematical formulation developed earlier. Various limitations of the mathematical model are also discussed.     

可视化并行程序开发平台的设计与实现

从方便用户进行并行程序设计的角度出发,开发了一个基于图形的可视化并行程序开发平台.该平台由3层构成:在应用层,用户通过图形的方式确定各进程间的通信关系;在进程层,使用平台提供的图标完成相应的程序设计;在代码层,通过代码产生器生成并行程序.图形方式隐藏了并行机制,降低了并行程序设计的难度.     

Optimum Design of Discrete-Time Differentiators via Semi-Infinite Programming Approach

In this paper, a general optimum full-band, high-order discrete-time differentiator design problem is formulated as a peak-constrained least squares optimization problem. That is, the objective of the optimization problem is to minimize the total weighted square error of the magnitude response subject to the peak constraint of the weighted error function. This problem formulation provides great flexibility for the tradeoff between the ripple energy and the ripple magnitude of the discrete-time differentiator. The optimization problem is actually a semi-infinite programming problem. Our recently developed dual parameterization algorithm is applied to solve the problem. The main advantages of employing the dual parameterization algorithm to solve the problem are as follows: 1) the guarantee of the convergence of the algorithm and 2) the obtained solution being the global optimal solution that satisfies the corresponding continuous constraints. Moreover, the computational cost of the algorithm is lower than that of algorithms that are implementing the semidefinite programming approach.      

Using Linear Programming to Design Oil Pollution Detection Schedules

This paper presents a flight scheduling system for sensor (infra-red and ultra-violet) equipped aircraft whose mission is the detection and prevention of harbor and coastal oil and hazardous material pollution. The aircraft scheduling model is a form of the stochastic traveling salesman problem which can be solved using linear programming. The objective of the model is to maximize the expected number of pollution incidents detected per pollution flight. The model requires as input parameters representing probabilities of pollution incidents occurring for different geographical sectors. These parameters are estimated using coastal and harbor shipping statistics for petroleum and hazardous material. The shipping statistics considered include movement of petroleum products along the Atlantic, Pacific and Gulf coasts as well as the movement of such commodities in the intra-coastal waterway system and the Great Lakes. Particular port characteristics and past pollution incident statistics are also used to estimate required parameters of the scheduling model. The constraints in the model concern the availability of aircraft, flight hours, mission hours, and the significant environmental factors which affect the performance of the sensors.     

Design of self-regulating production control systems by Tradeoffs Programming

Self-regulating Production Control Systems (SPCSs) include production control systems such as kanban, buffered lines, base-stock, and their variations and combinations. In this work we develop and implement, for SPCS design, a new simulation-based optimization method called Tradeoffs Programming (TOP). TOP is a technique closely related to multi-objective dynamic programming that attempts to optimize inseparable problems. TOP is based on the idea that given correctly defined performance measures, many systems are nearly separable, and we can decompose the overall system using efficiency frontiers of simulated performance measures of the subsystems. We apply this technique to SPCS design and perform a number of experiments to validate and analyze our algorithm. We find TOP to be very accurate, extremely robust, and widely applicable.     

Optimal Design of Electronic Components by Mixed-Integer Nonlinear Programming

Computer-aided design optimization of electronic components is a powerful tool to reduce development costs on one hand and to improve the performance of the components on the other. In this paper, a mathematical model of an electronic filter is outlined. It depends on certain parameters, some of them of being continuous, others of integer type. The purpose of the paper is to introduce an extension of the well-known sequential quadratic programming (SQP) method to solve the mixed-integer programming problem (MINLP). It is assumed that the integer variables cannot be relaxed to real ones, that the integer range is sufficiently large, and that they possess some physical meaning so that they basically behave like continuous ones. The general idea is to combine an SQP step with a direct search cycle in the integer space. Hessian information is updated based on difference formulae at neighbored grid points. Numerical results are included to show the feasibility of the mixed-integer nonlinear programming code for academic test examples and in addition for the optimal design of an electronic filter.     

制冷工程设计的微机可视化编程研究

以Visual Basic6．0语言，采用A．C．Cleand的制冷剂热力参数曲线拟合方程设计编写可视化制冷工程设计程序。用户界面友好，程序运行平稳，快捷，直观，覆盖面广，计算结果精度较高，适用于制冷工程设计和相关的科研数值计算和辅助教学。其中的双级压缩实际制冷循环可优化求解最佳中间温度和压力替代图解法。     

畸变不变空间滤波器的理论设计

本文给出畸变不变空间滤波器的一种理论设计。使用这个空间滤波器,可以实现平移、旋转、比例和强度不变模式识别。     

包装机械用空间凸轮的设计与加工

根据包装机械中常用的空间凸轮从动件在升程与降程都有较大负载的特殊运动要求,运用Pro/ENGINEER及MasterCAM软件进行参数化设计与数控加工,解决了一般编程方法难以解决的问题.     

基于AutoCAD的数控车床自动编程系统

以特征识别技术为基础,实现了AutoCAD二维工程图的特征提取,在此基础上,开发了一个基于AutoCAD的数控自动编程系统。介绍了系统的功能,利用UML对系统进行了描述和设计,给出了系统的用例图和类图。介绍了开发语言,选择VC＋＋和ObjectARX联合编程实现了系统的各项功能。研究了系统实现的关键技术,包括特征识别技术、尺寸公差数据库技术、刀具路径生成技术和后置处理技术。