多层印刷线路板测试点自动生成算法

根据国内ＰＣＢ制造行业的现状,为了解决人工确定测试点效率低助理铁出错的问题,文中提出了一种多层印刷线路板测试点自动生成的算法。该算法首先求取ＰＣＢ的连通网络,在连通网络的基础上按照测试要求自动提取测试点集,经厂家使用验证,具有良好的效果。     

GTPP—一种全局测试点插入算法

本文提出了一个全局测试点插入算法。该算法在可测性设计以前首先分析了电路的可测性，得到测试点候选集，该集合中每一个点都是对该电路的可测性可能有很大改进的测试点。文中首先采用选择跟踪的思想得到全局测试点插入的初始界限，然后将测试点插入算法形式化为一个要枝界限的问题，得到了一种全局的测试插入结果，文中的算法是基于ＳＣＴＭ测试提出来的。     

二维不规则图形和印制板电路区域运算的算法研究

区域运算是轮廓求解算法集中的核心算法，本介绍适用于复杂ＰＣＢ电路和二维不规则图案的一种区域运算算法，阐述了它的数字模型，算法描述，正确性证明和复杂性分析，与典型的算法比较，它有明显的优越性。     

启亨麻辣子5．1—纯正的音乐体验

拿到启亨麻辣子５．１声卡的时候，就被它那独特的银色ＰＣＢ板深深吸引，它是如此的与众不同，如此的让人惊讶。这应该是笔者第一次真正看到采用银色的ＰＣＢ板的声卡，尽管笔者早就知道启亨大名鼎鼎的“大银家”显卡也是采用银色的ＰＣＢ板。 银质ＰＣＢ板的采用应该算是ＰＣＢ技术领域前所未有的革新，它跟我们经常看到的红色、蓝色以及其它色彩的ＰＣＢ是完全不一样的。我们都知道，其实是红色或者蓝色的ＰＣＢ板仅仅改变的是ＰＣＢ表面，但启亨麻辣子５．１声卡所采用的银质ＰＣＢ技术却是真正的从材质上改变的。这种银质ＰＣＢ技术具…     

二维不规则复杂图形轮廓求解的算法研究

本文介绍了适用于复杂ＰＣＢ电路和二维不规则图案的一种轮廓求解算法，阐述了它的数学模型、算法描述与实现、正确性证明和复杂性分析，并给出了在一台基于ＰＣ３８６多功能ＣＡＤ／ＣＡＭ系统（ＣＡＣＡＯ）上的加工实例。     

二维不规则图形和即制板电路区域运算的算法研究

区域运算是轮廓求解算法集中的核心算法．本文介绍适用于复杂ＰＣＢ电路和二维不规则图案的一种区域运算算法，阐述了它的数学模型、算法描述、正确性证明和复杂性分析．与典型的算法比较，它有明显的优越性．     

PCB数控钻孔最佳走刀路线的建模与求解

当前的印刷电路板（ＰＣＢ）数控钻自动编程系统生成的钻孔路线并非最佳走刀路线。本文通过分析,将ＰＣＢ数控钻孔最佳走刀路线问题归结为大型ＴＳＰ问题,其目标函数定为钻头的总走刀时间最短。由于ＴＳＰ问题在理论上属于ＮＰ完备问题,很难用一般的算法求解。本文详细介绍了用模拟退火方法求解该问题的具体算法,并以此为基础开发了ＰＣＢ最优化的自动编程系统。     

高速PCB设计技术

高速ＰＣＢ已成为数字系统设计中的主流设计。本文概述了ＰＣＢ设计的发展趋势及设计流程，详细分析了影响高速信号传输的关键因素，具体介绍了规则驱动的ＰＣＢ设计方法和高速ＰＣＢ设计分析技术，介绍了现代ＥＤＡ技术的概况。     

分布式应用中的远程过程调用

远程过程调用（ＲＰＣ）是网络进程之间相互通信与协作的一种有效机制。本文首先对ＲＰＣ的一般原理、工作流程和实现机制等进行了分析，然后以作者设计实现的分布式工程数据库管理系统ｄＥＤＢＭＳ为例，给出了利用ＲＰＣ进行分布式程序设计的步骤和算法     

基于BP网络的PID型预测自校正控制器

采用ＢＰ网络对ＰＩＤ型大范围预测控制器（ＰＩＤＧＰＣ）的参数ｋｐ，ｋｉ，ｋｄ及α进行自学习，并在多个模型构成的系统上进行了仿真，验证了该算法的适应性和鲁棒性，为设计通用的ＧＰＣ控制器提供了一种新的手段。     

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     

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。     

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。