虫孔路由二维网孔机器上的最优图论算法

连通分量和最小生成树是图论中的两个基本问题 ,在许多领域都有很多应用 .对于顶点数为 n的图和规模为 p× p的虫孔路由二维网孔机器 ,该文针对 p n和 n

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有向图的强连通分量及应用

有向图的强连通分量应用非常广泛，比如有向图的强连通分量数量巨大的时候，为了更加高效必须要用缩点法。深度优先遍历是求有向图的强连通分量的一个有效方法，根据实现方式的不同，总体上，求有向图的强连通分量有三种算法，分别是Kosaraju算法，Gabow算法和Tarjan算法。三种算法的时间复杂度均为O（n＋e）（n为顶点数，e为边数）。     

区域表示：线性四元树转换成边界链码

本文提出一种算法实现单连通区域的线性四元树表示转换成区域边界的4-方向链码描述。首先给出测定水平、垂直和对角方向邻接对的算法。利用这些算法的执行结果,可以定义一个边界四分形的边邻接方向矩阵。采用一组规则驱动该矩降,能够使转换过程用代数方法实现。     

Prufer编解码的最优算法

讨论标号树的Prufer编码的编解码算法.文献中常见的Prufer编解码算法需要O(n log n)时间.文献[1,2,4,9]提出了Prufer编解码的线性时间算法.这些算法都用到了整数排序算法,利用待排序整数的取值特殊性,得到线性时间整数排序算法.由此将Prufer编解码问题的计算归结为整数排序问题.本文从更直接的角度考察Prufer编解码问题,从简单算法出发,挖掘问题的本质特征,逐步简化,得到Prufer编码的一个非常简单实用的线性时间最优编解码算法.本文采用的解决问题的方法也具有一定的技巧,可供解决类似问题时借鉴.     

一个基于线性四元树的连通标记算法

图象的四元树表示提供了有效地节省图象存储空间及快速地实施图象处理的方法,而利用四元树实现图象的连通标记则是图象处理、图象分析及计算机图形学中最基本的操作之一。文献〔1〕和〔2〕分别给出了基于指针四元树和线性四元树的图象连通标记算法。本文提出了一个新的基于线性四元树(Linear Quadtree,简称 LQT)的连通标记算法 CCL(T,N)(Connected Component Labeling),其算法平均时间复杂度与前两个算法相同,均为 O(N.logN),但其实用效率及通用性均优于前两者。     

Neville编解码问题的线性时间算法

讨论标号树的Neville编码的编解码算法.文献中常见的第2种Neville编解码算法需要O(n log n)时间.近期研究文献指出至今尚未找到第2种Neville编解码的线性时间算法.本文对第2种Neville编解码问题的本质特征进行较深入的分析,从简单算法出发,逐步简化,得到一个非常简单实用的O(n)时间Neville编解码算法.本文采用的解决问题的方法也具有一定的技巧,可供解决类似问题时借鉴.     

线性四元树中轴变换

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采用图分解的特征识别算法研究

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快速连通域分析算法及其实现

本文提出一种快速连通域分析算法,它对像素的行程进行操作,并将标号作为行程及连通域的特征之一,特征通过数据结构的指针与行程及连通域相联系.该算法运用了两个关键技术,一是设计了一种链式机制来表示和实现标号的等价关系,二是通过指针的传递来实现标号及其它特征的向下传递和逆向传播,特征在标号过程中动态修改.这样甚至能实现仅对图像一遍扫描便能完成连通域标记和常用特征量的计算.实验表明了本文算法的有效性.     

线性八叉树及其上的集合运算

八叉树编码方法是目前计算机图形学、图象处理和CAD/CAM技术中的一种新的方法。由于采用这种方法表示物体后,对物体进行相干性判别和消除隐藏线(面)操作变得容易而越来越引起人们的兴趣。但由于八叉树编码方法占用的内存太多,而且采用的数据结构是一个非线性结构(树状结构),因此不令人满意。而线性八叉树编码方法很好地解决了上面这两个问题。线性八叉树编码方法由Gar-gantini引入,但她没有给出线性八叉树的深入的性质,也没有详细给出算法。 本文引入了一些与线性八叉树有关的概念,给出并证明了线性八叉树的一些性质。最后,作为这些结果的应用,我们提出了由线性八叉树编码方法所表示的物体之间的集合运算的算法。并对这些算法进行了分析。这些算法都具有线性的时间复杂性。     

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.     

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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。