Knowledge-based decision support system for tool management in flexible manufacturing system

Tool management is not a single, simple activity, it is comprised of a complex set of functions, especially in a flexible manufacturing system (FMS) environment. The issues associated with tool management include tool requirement planning, tool real-time scheduling, tool crib management, tool inventory control, tool fault diagnosis, tool tracking and tool monitoring. In order to make tools flow into/out of FMS efficiently, this work is aimed to design a knowledge-based decision support system (KBDSS) for tool management in FMS. Firstly an overview of tool management functions is described. Then the structure of KBDSS for tool management and the essential agents in the design of KBDSS are presented. Finally the individual agents of KBDSS are discussed for design and development.     

Robust stability test for 2-D continuous-discrete systems with interval parameters

It is revealed that the dynamic stability of 2-D recursive continuous-discrete systems with interval parameters involves the problem of robust Hurwitz-Schur stability of bivariate polynomials family. It is proved that the Hurwitz-Schur stability of the denominator polynomials of the systems is necessary and sufficient for the asymptotic stability of the 2-D hybrid systems. The 2-D hybrid transformation, i. e. 2-D Laplace-Z transformation, has been proposed to solve the stability analysis of the 2-D continuous-discrete systems, to get the 2-D hybrid transfer functions of the systems. The edge test for the Hurwitz-Schur stability of interval bivariate polynomials is introduced. The Hurwitz-Schur stability of the interval family of 2-D polynomials can be guaranteed by the stability of its finite edge polynomials of the family. An algorithm about the stability test of edge polynomials is given.     

基于X．400电子邮件系统在CIMS中的设计及实现

本文对计算机集成制造系统（ＣＩＭＳ）及并行工程（ＣＥ）中的电子邮件通信问题进行了分析，设计并实现了一个面向ＣＩＭＳ应用工厂的电子邮件系统，给出了主要的功能模型，并对电子邮件在企业中的进一步应用作了介绍。     

拟实制造与现代仿真技术

１９９１年，美国里海大学的几位教授首次提出了敏捷制造的“Ａｇｉｌｅ Ｍａｎｕｆａｃｔｕｒｉｎｇ”的概念。他们在美国国会和国防部的支持下会同美国众多工业界的主要决策人在向美国国会提交的“美国２１世纪制造战略报告”对敏捷制造的概念，方法及相关技术作了全面的描述。是美国进行先进制造技术研究的重要里程碑。近年来，美国工业／学术各界又在对Ａｇｉｌｅ Ｍａｎｕｆａｃｔｕｒｉｎｇ的有关理论和实现问题深入探讨的基     

底盘测功编程中功率及驱动力曲线的处理方法

为了实测时能够及时得到并记录汽车底盘的功率-速度曲线、驱动力-速度曲线，在对底盘测功机控制程序编程时需考虑坐标的建立及曲线的绘制问题。本文旨在介绍Form窗口下为曲线建立动态坐标的必要性，阐明了根据测出的点数不同绘制曲线的方法，并举例说明此种方法可达到良好效果。     

ANSYS在柔掩支架变形特性分析中的应用

选择柔性掩护支架工作时常见的凡种工况及支架的破坏形式，采用国外最为先进的三维设计和分析软件PRO／E建立柔性掩护支架的三维模型，利用有限元分析软件ANSYS对支架结构的强度和刚度进行分析，确定其应力和应变的薄弱点。根据有限元分析的具体结果，对柔性掩护支架的结构进行优化，重新建立模型，再次进行有限元分析。如此反复，直至获得柔性掩护支架的最佳结构。     

校园IC卡在无线通信领域中的应用

IC卡具有体积小、保密性强和使用方便的特点，它被普遍用作身份识别和电子钱包。短信是一种新兴的通信方式，与传统方式相比，它具有价格低廉、方便快捷的优越性。本文结合这两项技术，介绍了通过AT指令驱动，向家长手机发送学生刷卡记录和接收家长的短信留言，从而家长可以实时跟踪学生的到校情况，并给学生留言。     

建筑结构TMD振动控制及其新体系减震研究

分析了结构TMD振动控制机理及在结构风振控制中的研究应用；针对建筑结构的TMD减震控制，介绍了研究现状及进展，进一步采用时程分析法和地震波输入，研究了TMD新体系采用摩擦支座和橡胶支座时的减震控制分析理论。通过研究，指出了其在结构强震反应控制中面临的几个问题。     

Preparation and characteristics of flexible all-organic thin-film field-effect transistor

Much attention has been attracted to organic thin-film field-effect transistors (OTFFETs) in the past decades[1—4]. Because of their lower cost and easier preparation, OTFFETs are considered to be useful in driving liquid crystal displays (LCD) and organic light-emitting diodes (OLED). Furthermore, flexible OTFFETs will be one of the most useful electronic devices for flexible active matrix driving circuits. OTFFETs based on pentacene single crystal have been reported to be of g…     

基于Matlab的模态法简化大系统模型仿真

用于简化大系统的模态集结法中模态矩阵的求法很多,主要讨论将矩阵分析求解特征向量的方法用于模态矩阵的求取,并考虑到实际系统中状态矩阵不能为复数,将约当块进行适当的变形,求取对应的模态矩阵,给出了用Matlab计算全过程的程序.