ECRH系统总控的研究

本文介绍了ECRH系统总控的设计方案。着重分析了方案特点和具体措施，针对ECRH系统的特殊性，主要介绍了参与控制的信号的处理方法，并简要介绍了总控系统的通讯及PPI通讯协议。调试结果显示，总控系统设计实现了稳定安全与可靠性。     

ECRH高压电源反馈控制系统的设计与实现

根据ECRH系统的要求，设计了以工控机为核心的ECRH高压电源反馈控制系统，其硬件采用研华的DI／DO，A／D，D／A，中断记数卡PCL-836等，软件运行环境选用MICROsoft DOS，利用C＋＋V3．0编写软件，给出了控制流程和控制算法，采用两级前馈与PD反馈控制相结合的控制方法，使ECRH高压电源输出电压稳定度达到土0．5％；实验证明，该反馈控制系统不仅具有良好控制性能，并且具有可靠的保护功能。     

ECRH负高压电源系统信号隔离传输设计

负高压电源系统是ECRH系统的重要组成部分，其信号的传输是整个系统运行的关键。文章介绍了一种利用V／F(Voltage／Frequency)和F／V(Frequency／Vohage)转换器实现ECRH(Electron Cyclotron ReSonance Heating)负高压电源系统信号隔离传输的方法，设计了基于DMC5501和DMC5502转换器的硬件电路。实验结果表明，该方法有较好的稳定性和可靠性，能满足高压隔离和抗干扰要求，达到了预期目标。     

ECRH系统中央控制器异常诊断设计与仿真

异常诊断是ECRH控制系统中存在的一大问题。由于控制回旋管的信号繁多,且控制实时性要求高,一般延迟要求在微秒量级。一旦发生故障,控制系统会立即关闭各高压电源以保护回旋管。想要查找异常发生的原因,只能将各信号均接入示波器,并且等待该故障再次发生时被示波器捕获,这样不仅难以定位异常,而且耗时耗力。针对以上问题,设计了ECRH系统中央控制器的异常诊断逻辑,该诊断逻辑主要基于正常的回旋管控制流程,通过判断回旋管控制流程的走向以及各种检测输入信号来诊断异常发生的原因。将诊断逻辑与正常的回旋管控制逻辑嵌入到同一片FPGA芯片中,并发运行。时序仿真结果表明,在故障发生时能够立即输出异常信号给计算机,实现了实时在线故障检测和诊断,使整个电子回旋共振加热控制系统更加智能化。     

基于单片机的脉冲发生器的设计与应用

本文介绍了我所电子回旋共振加热(ECRH)系统中所用到的基于单片机的脉冲发生器，给出脉冲发生器硬软件的具体设计。     

燃料电池控制系统开发

首先介绍了燃料电池的原理和分类，质子交换膜燃料电池的主要特点和技术问题；并针对PEMFC电堆系统的复杂性，提出了PEMFC电堆系统结构．系统结构主要包括：燃料贮存与供给系统、空气供给系统、冷却水循环系统、功率测量系统、控制系统、报警系统和通讯系统。然后以定点DSP芯片TMS320F2812作为控制系统的核心，详细分析了质子交换膜燃料电池控制系统的硬件设计和软件设计；采用了合适的控制策略和控制算法，形成了实用化的燃料电池控制系统的雏形。     

网络化控制系统的科学问题与应用展望

作为在串行网络上实现反馈控制回路的控制系统，网络化控制系统减少了系统布线，增加了系统的柔性，提高了系统的可诊断性和可维护性．在综述网络化控制系统研究现状与进展的基础上，对网络化控制系统所涉及的科学问题和应用领域进行了深入分析，并对网络化控制系统的未来发展作了展望．     

基于Matlab的液压运动平台控制系统设计

以Matlab为开发工具，设计飞行模拟器液压运动平台控制系统。在建立了控制对象的数学模型后，根据国家军用标准对飞行模拟器运动平台系统的性能要求，使用PID控制方案设计了液压运动平台系统的控制器，利用Matlab语言编写程序求解出了控制系统的最佳控制参数。实际应用表明，该方法具有综合性强、灵活高效等特点，能广泛地应用于飞行模拟器的液压运动平台系统、操纵负荷仿真系统、仿真仪表控制系统的设计和开发。该项研究对控制系统的性能分析及利用PID控制方案设计控制系统具有一定的参考价值。     

选煤厂集散控制DCS系统的设计与实现

由于选煤厂设备类型众多，对于分散的设备难以实现集中管理，因此，在自动控制技术的基础上，设计了一种集散控制DCS系统。建立选煤厂集散控制系统框架，从硬件和软件两方面分别给出了设计方案，由微机生产管理系统、DCS-6 CPU控制系统、产品装车控制系统组成硬件系统，利用PID控制算法辅助系统硬件，将分散的设备数据集中在一起，实现对选煤厂各类设备的集散控制。将应用DCS系统前后的集散控制系统在控制范围、控制效率以及系统续航时间等方面展开实验对比，实验结果表明，应用DCS系统后，集散控制系统的控制范围有了明显增加，控制效率较应用前相比也有了显著提升，而且系统续航时间更长，对于提高洗选煤效率起到了非常重要的推动作用。     

基于PC/104的自调匀整装置控制系统的研制

在介绍了PC/104特点的基础上，利用PC/104研制开发出了一种自调匀整装置控制系统，包括PC/104模块的选择、控制系统硬件的结构设计，并给出了控制系统的软件思想和流程图以及系统具备的主要功能。通过现场调试验证，该控制系统运行平稳可靠、控制精度高，特别是稳定性和可靠性大大提高，并且该系统价格低廉、结构紧凑、占用空间小，具有较好的市场应用前景。     

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。     

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.     

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.     

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     

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.     

Explanation and prediction: an architecture for default and abductive reasoning

Although there are many arguments that logic is an appropriate tool for artificial intelligence, there has been a perceived problem with the monotonicity of classical logic. This paper elaborates on the idea that reasoning should be viewed as theory formation where logic tells us the consequences of our assumptions. The two activities of predicting what is expected to be true and explaining observations are considered in a simple theory formation framework. Properties of each activity are discussed, along with a number of proposals as to what should be predicted or accepted as reasonable explanations. An architecture is proposed to combine explanation and prediction into one coherent framework. Algorithms used to implement the system as well as examples from a running implementation are given.     

Three Process Perspectives: Organizations, Teams, and People

This paper provides the author's personal views and perspectives on software process improvement. Starting with his first work on technology assessment in IBM over 20 years ago, Watts Humphrey describes the process improvement work he has been directly involved in. This includes the development of the early process assessment methods, the original design of the CMM, and the introduction of the Personal Software Process (PSP)^SM and Team Software Process (TSP){^SM}. In addition to describing the original motivation for this work, the author also reviews many of the problems he and his associates encountered and why they solved them the way they did. He also comments on the outstanding issues and likely directions for future work. Finally, this work has built on the experiences and contributions of many people. Mr. Humphrey only describes work that he was personally involved in and he names many of the key contributors. However, so many people have been involved in this work that a full list of the important participants would be impractical.     

基于复小波噪声方差显著修正的SAR图像去噪

提出了一种基于复小波域统计建模与噪声方差估计显著性修正相结合的合成孔径雷达(Synthetic Aperture Radar,SAR)图像斑点噪声滤波方法。该方法首先通过对数变换将乘性噪声模型转化为加性噪声模型,然后对变换后的图像进行双树复小波变换(Dualtree Complex Wavelet Transform,DCWT),并对复数小波系数的统计分布进行建模。在此先验分布的基础上,通过运用贝叶斯估计方法从含噪系数中恢复原始系数,达到滤除噪声的目的。实验结果表明该方法在去除噪声的同时保留了图像的细节信息,取得了很好的降噪效果。