非线性系统的PD型迭代学习控制

非线性系统的ＰＤ型迭代学习控制孙明轩黄宝健张学智（西安工业学院电子系西安７１００３２）关键词初始条件问题，迭代学习控制，非线性系统．１）国家自然科学基金资助项目．收稿日期１９９６－０７－２５１引言运用迭代学习控制技术设计控制器时，只需要通过重复操作获...     

模型跟随自适应控制的Systolic实现

模型跟随自适应控制的Ｓｙｓｔｏｌｉｃ实现康正九胡保生（西安交通大学系统工程研究所西安７１００４９）关键词自适应控制，参数估计，并行算法，Ｓｙｓｔｏｌｉｃ阵列．１）国家自然科学基金资助项目收稿日期１９９５－０１－１３１引言自动控制的发展离不开计算机技术...     

恩智浦演示全球首款可编程多模LTE调制解调器

恩智浦半导体近日已在巴塞罗那举办的世界移动大会上演示全球第一个LTE／HSPA／UMTS／EDGE／GPRS／GSM多模基带平台。此平台是下一代软件无线电（SDR）系统解决方案的构造基础。以恩智浦强大的新式数字信号处理核心——嵌入式矢量处理器（EVP）为动力，这一解决方案能够实现150Mbit的下行数据传输速率和50Mbit的上行数据传输速率，并具备多模的能力以应对不断发展变化的移动标准，尤其帮助下一代移动终端制造商应对挑战。     

白水煤矿地面生产系统的PC控制

白水煤矿地面生产系统的ＰＣ控制杨世兴，柴钰，高，童军（西安矿业学院）１概述白水煤矿地面生产系统主要由８合设备组成（见图１），可用ＰＣ实现集中控制。根据需要可实现３种工艺流程：系统增加了二次筛选设备６０、７４、８＃，采用ＰＣ实现集中控制在西北煤炭系统属...     

迭代学习控制理论进展与挑战

迭代学习控制理论进展与挑战林辉，戴冠中（西北工业大学自动控制系·西安，７１００７２）１前言让控制器本身具有某种“智能”，使得它在控制过程中能不断地完善自己，以使控制效果越来越好．这种具有“学习”能力的控制器一直是控制工程师们追求的目标．自从ＦＵ［‘］...     

基于PU2RC的下行多用户MIMO系统多模发送方案

针对有限反馈下行多用户多输入多输出（multiple-input multiple-output, MIMO）系统,提出了一种基于每用户正交码率控制（per user unitary rate control, PU2RC）的多模发送方案。该方案通过最大化系统的遍历和速率来自适应地选取发送模式,即系统同时传输的并行数据流数目。由于直接计算系统的遍历和速率比较困难,论文推导出它的一个上界,并以最大化该上界来简化发送模式的选取。仿真结果表明,所提方案的遍历和速率性能优于传统PU2RC方案,特别当系统中用户数不大或者信噪比较高时,性能有明显的改善。     

等级制人事系统的计算机辅助宏观管理及控制（续一）

等级制人事系统的计算机辅助宏观管理及控制（续一）熊敏（江西省军区南昌３３０００６）（上接１９９６年第２期）２控制方法由模型平衡方程（１．１）、（１．４）、（１．６），我们希望有：预测一般是根据现有的数据，推测将来的状态，对等级制人事系统研究我们也用了...     

多项式H_∞范数的一种解析算法

多项式Ｈ_∞范数的一种解析算法黄永宣（西安交通大学信控系西安７１００４９）关键词：Ｈ_∞范数，多项式，解析算法１引言近年来，民范数及其优化理论已经在控制理论与应用的许多领域中得到广泛地使用．但是，现有的Ｈｔｏ范数的计算都是逐次逼近算法“’“，这种算法计...     

链控制器及其应用

链控制器及其应用陈铁军，邱祖廉（郑州工学院信控所郑州４５０００２）（西安交通大学信控系西安７１００４９）关键词子系统，稳定性，链系统，结构分散化１、链控制器的定义考虑一个多变量受控系统Ｘ，其因果结构为Ｌ＇＂，相应的链系统为（２，Ｌ）．设Ｘ；表示其第ｎ...     

一类非线性的自适应与L2增益混合控制

本文在文献（１，２）的基础上，对一类非线性系统提出了把自适应控制与Ｌ２－增益≤γ的控制相结合的控制思想，所导出的控制策略具有下面优点：１）整个系统仅需要与未知干扰个数相等的ｐ个估计器，克服了文献（１）中需要ｎｐ个估计器；２）扩充了文献（２）的结果，使未知扰动能够出现在控制通道，并能克服有界匹配外扰。计算机仿真结果表明控制方案是可行的。     

Only connect: teaching, technology and telesis

Abstract This paper describes an approach to the design of interactive multimedia materials being developed in a European Community project. The developmental process is seen as a dialogue between technologists and teachers. This dialogue is often problematic because of the differences in training, experience and culture between them. Conditions needed for fruitful dialogue are described and the generic model for learning design used in the project is explained.     

European Community policy and the market

Abstract This paper starts with some reflections on the policy considerations and priorities which are shaping European Commission (EC) research programmes. Then it attempts to position the current projects which seek to capitalise on information and communications technologies for learning in relation to these priorities and the apparent realities of the marketplace. It concludes that while there are grounds to be optimistic about the contribution EC programmes can make to the efficiency and standard of education and training, they are still too technology driven.     

一种自适应子融合集成多分类器方法

融合集成方法已经广泛应用在模式识别领域,然而一些基分类器实时性能稳定性较差,导致多分类器融合性能差,针对上述问题本文提出了一种新的基于多分类器的子融合集成分类器系统。该方法考虑在度量层融合层次之上通过对各类基多分类器进行动态选择,票数最多的类别作为融合系统中对特征向量识别的类别,构成一种新的自适应子融合集成分类器方法。实验表明,该方法比传统的分类器以及分类融合方法识别准确率明显更高,具有更好的鲁棒性。     

煤矿井下安全监控分站的设计及其仿真实现

为了设计一种具有低成本、低功耗、易操作、功能强且可靠性高的煤矿井下安全分站,针对煤矿安全生产实际,文章提出了采用MCS-51系列单片机为核心、具有CAN总线通信接口的煤矿井下安全监控分站的设计方案;首先给出煤矿井下安全监控分站的整体构架设计,然后着重阐述模拟量输入信号处理系统的设计过程,最后说明单片机最小系统及其键盘、显示、报警、通信等各个组成部分的设计;为验证设计方案的可行性与有效性,使用Proteus软件对设计内容进行仿真验证,设计的煤矿井下安全监控分站具有瓦斯、温度等模拟量参数超标报警功能和电机开停、风门开闭等开关量指示功能;仿真结果表明:设计的煤矿井下安全监控分站具有一定的实际应用价值.     

Avoiding semantic and temporal gaps in developing software intensive systems

Development of software intensive systems (systems) in practice involves a series of self-contained phases for the lifecycle of a system. Semantic and temporal gaps, which occur among phases and among developer disciplines within and across phases, hinder the ongoing development of a system because of the interdependencies among phases and among disciplines. Such gaps are magnified among systems that are developed at different times by different development teams, which may limit reuse of artifacts of systems development and interoperability among the systems. This article discusses such gaps and a systems development process for avoiding them.     

基于QTE的蒙古文显示机制研究与实现

蒙古语言是中国蒙古族使用的通用语言,由于蒙古文区别于其他文字的书写方式和其自身变形机制等特点,在很多通用的文字处理引擎中都不被支持。在嵌入式产品开发与应用领域中Linux加QTE已经成为流行方式。该文给出了一种在QTE环境上实现基于标准Unicode的蒙古文点阵显示和变形算法, 并自定义了支持蒙古文的QTE组件,扩展了QTE功能,为在Linux加QTE方式的嵌入式体系结构中处理蒙古文提供了一种解决方法。     

Designing economic np control charts: A programmed simulation approach

This paper presents control charts models and the necessary simulation software for the location of economic values of the control parameters. The simulation program is written in FORTRAN, requires only 10K of main storage, and can run on most mini and micro computers. Two models are presented - one describes the process when it is operating at full capacity and the other when the process is operating under capacity. The models allow the product quality to deteriorate to a further level before an existing out-of-control state is detected, and they can also be used in situations where no prior knowledge exists of the out-of-control causes and the resulting proportion defectives.     

基于AD9626的模拟信号采集存储卡设计

自然界的绝大部分信号都是以模拟的形式存在,因此模拟信号的采集转换存储在数字时代十分关键。文章讨论了在雷达信号处理领域基于AD9626的AD采集存储卡的设计原理、硬件结构和程序设计与芯片配置等问题,为今后相关领域的研究提供了可参考的方案。     

The development of robot art

Going through a few examples of robot artists who are recognized worldwide, we try to analyze the deepest meaning of what is called “robot art” and the related art field definition. We also try to highlight its well-marked borders, such as kinetic sculptures, kinetic art, cyber art, and cyberpunk. A brief excursion into the importance of the context, the message, and its semiotics is also provided, case by case, together with a few hints on the history of this discipline in the light of an artistic perspective. Therefore, the aim of this article is to try to summarize the main characteristics that might classify robot art as a unique and innovative discipline, and to track down some of the principles by which a robotic artifact can or cannot be considered an art piece in terms of social, cultural, and strictly artistic interest. This work was presented in part at the 13th International Symposium on Artificial Life and Robotics, Oita, Japan, January 31–February 2, 2008     

A human-computer interface for non-computer specialists

The COM teleconferencing system was designed to be easy to use for both beginners and people with much computer experience. A number of design choices in organizing the human-computer interface were considered very carefully. These design problems are not unique for teleconferencing applications, but will appear in many other developments of human-computer interfaces for non-computer specialists. This report discusses naming conventions, menu format, user commands, help facility and the treatment of ‘type ahead’ from the users.