一种图像纹理分割的小波-像素曲线演化方法

提出了图像纹理分割的小波—曲线演化方法，该方法运用二维小波对纹理图像进行分解，由四个小波系数描述纹理特征，并组成四维小波系数特征矢量图，然后采用最大后验概率模型的曲线演化方法，对特征矢量图进行分割和分类，从而获得原图像纹理分割结果．实验结果表明，与小波—FCM聚类纹理分割方法相比，该方法对双纹理图像能取得较好的分割效果，分割出的边界连续，并且具有较强的抗噪能力．     

一种基于三进制小波变换的纹理分割方法

提出了一种基于三进制小波变换的纹理特征提取方法，多纹理图像经过三进制小波滤波器组后得到九个子带图像，采用小波系数的标准差作为纹理测度以生成特征向量，利用常规的C-均值聚类算法进行纹理分割，实验结果表明了该特征提取方法的有效性。     

基于小波变换的纹理图像分割

基于小波的纹理图像分割方法是把小波变换应用于纹理的特征提取。通过对原始纹理图像进行高阶小波分解，构成每个象素对应一个特征矢量，对所提取的特征利用均值举类算法进行分类，最终获得图像的分割结果。为了提高纹理分割图像的边缘准确性和区域性以及降低分割错误率，提出了利用特征加权来进行后分割的方法。     

用于分割双纹理图像的最佳单Gabor小波参数的反馈系统

设计了一个对分割双纹理图像的最佳单Gabor小波参数进行自适应调整的反馈系统。该系统利用Gabor小波的带通特性使某一频率的纹理通过，而另一频率的纹理受到抑制，由RBF神经网络对预处理后的图像参数进行估计，求出最优分割阈值。以分割阈值误差率为反馈量对Gabor小波参数进行自适应调整，从而得到最佳Gabor小波参数。实验证明，该系统对双纹理图像的分割达到了预期的结果。     

树型小波变换在纹理分析中的应用

分析了小波变换的特点,将传统的塔型小波变换和树型小波变换进行了比较,给出了一种用树型小波来提取纹理特征进行纹理图象分割的方法。经过实验结果表明,用树型小波变换可以在纹理分析中获得较好的效果。     

基于不同复小波变换方法的纹理检索和相似计算

复小波克服了单小波的缺点，具有时移不变性、方向性信息多和相位信息等特点．从能量角度出发．主要研究了不同复小波变换方法的一阶和二阶统计矩（共生矩阵）特性，并应用于纹理特征的提取，与传统的单小波做了比较．通过理论分析和在纹理图像检索的对比实验数据说明了复小波在纹理特征提取方面的性能优于单小波，采用一阶和二阶统计矩相结合方法的性能最好，检索精度提高了8％．     

基于二进小波统计特征的纹理图像检索

二进小波变换利用模局部极大值来提取图像的多尺度边缘信息。该文研究了二进小波系数的统计特性，提出并验证了二进小波系数直方图服从于指数分布。分析了二进小波系数的一阶、二阶统计矩(共生矩阵)特性并将其应用于纹理特征提取。理论分析和实验说明，采用Manjunath方法和二阶统计矩方法的二进小波在纹理图像检索方面优于单小波。     

一种基于纹理特征的超声心动图像分割算法

以马尔可夫随机过程和梯度小波变换为基础提出了梯度小波纹理模型.由梯度小波纹理模型的参数组成描述图像纹理的特征向量,梯度小波纹理模型利用了马尔可夫随机场图像模型的优点和基于该模型的成熟方法,并且引入了多尺度、多分辨率等特性.然后采用Kohonen自组织SOM(Self-Organizing Feature Map)神经网络对纹理特征向量进行无监督学习,最后对超声心动图像进行纹理分割,取得较满意的分割效果.     

基于小波包变换和蚁群算法的纹理分类

提出了一种小波包变换和蚁群算法相结合的纹理分类新方法。首先采用小波包变换提取纹理图像的纹理特征向量,然后用蚁群算法进行训练和分类。实验表明小波包变换和蚁群算法应用到纹理分类领域,是一次有效的尝试。     

基于二维自适应异小波基小波变换的规则纹理缺陷检测

许多纹理具有规则的重复出现的纹理单元,如纺织纤维结构。为了处理有缺陷的纹理图象,提出了一种利用不同自适应小波基与纹理模型匹配的二维小波变换的新方法。与Ｄａｕｂｅｃｈｉｅｓ的小波基不同,其行和列采用不同的自适应正交小波基,且用遗传算法得到。实验结果表明该方法能确定纹理缺陷的位置。     

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.     

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.     

View-based model-driven architecture for enhancing maintainability of data access services

In modern service-oriented architectures, database access is done by a special type of services, the so-called data access services (DAS). Though, particularly in data-intensive applications, using and developing DAS are very common today, the link between the DAS and their implementation, e.g. a layer of data access objects (DAOs) encapsulating the database queries, still is not sufficiently elaborated, yet. As a result, as the number of DAS grows, finding the desired DAS for reuse and/or associated documentation can become an impossible task. In this paper we focus on bridging this gap between the DAS and their implementation by presenting a view-based, model-driven data access architecture (VMDA) managing models of the DAS, DAOs and database queries in a queryable manner. Our models support tailored views of different stakeholders and are scalable with all types of DAS implementations. In this paper we show that our view-based and model driven architecture approach can enhance software development productivity and maintainability by improving DAS documentation. Moreover, our VMDA opens a wide range of applications such as evaluating DAS usage for DAS performance optimization. Furthermore, we provide tool support and illustrate the applicability of our VMDA in a large-scale case study. Finally, we quantitatively prove that our approach performs with acceptable response times.     

A pragmatic multi-method investigation of discrepant technological events: Coping,attributions, and ‘accidental’ learning

Discrepant technological events or situations that entail a problem, a misunderstanding or a difficulty with the Information Technology (IT) being employed, are common in the workplace, and can lead to frustration and avoidance behaviors. Little is known, however, about how individuals cope with these events. This paper examines these events by using a multi-method pragmatic approach informed by coping theory. The results of two studies – a critical incident study and an experiment – serve to build and test, respectively, a theoretical model that posits that individuals use a variety of strategies when dealing with these events: they experience negative emotions, make external attributions, and adopt engagement coping strategies directed at solving the event, eventually switching to a disengagement coping strategy when they feel they have no control over the situation. Furthermore, users’ efforts may result in ‘accidental’ learning as they try to overcome the discrepant IT events through engagement coping. The paper ends with a discussion of the results in light of existing literature, future opportunities for research, and implications for practice.     

The Distributed Time-Triggered Simulation Scheme: Core Principles and Supporting Execution Engine

Distributed real-time simulation is a young technology field but its practice is under increasing demands. In recent years the author and his collaborators have been establishing a new approach called the distributed time-triggered simulation (DTS) scheme which is conceptually simple and easy to use but widely applicable. The concept was initiated in the course of developing a new-generation object-oriented real-time programming scheme called the time-triggered message-triggered object (TMO) programming scheme. Some fundamental issues inherent in distributed real-time simulation that were learned during recent experimental studies are discussed along with some approaches for resolving the issues. An execution engine developed to support both the TMOs engaged in control computation and the TMOs engaged in DTS is also discussed along with its possible extensions that will enable significantly larger-scale DTSs.     

Software-Konfigurationsmanagement in großen Softwareprojekten

Zusammenfassung Mit zunehmender Größe der Softwaresysteme verschärfen sich die für die Software-Herstellung typischen Probleme: Beherrschen großer Objektmengen, Erhalten der Systemkonsistenz, Kontrolle der ständigen Änderungseinflüsse und Gewährleisten einer langen Lebensdauer. Die Disziplin Konfigurationsmanagement bildet den methodischen Ansatz, diese Probleme besser zu beherrschen. Software-Konfigurationsmanagement faßt die Herstellung von Softwaresystemen als eine Abfolge von kontrollierten Änderungen an gesicherten Zwischen- und Endergebnissen auf. Dargestellt werden die Objekte und Funktionen des Software-Konfigurationsmanagements sowie die hierfür in großen Software-Projekten benötigten Methoden, Instanzen und Hilfsmittel.     

Call for Papers The 6^th International Conference on Grid and Cooperative Computing

Recent years have seen rapid advances in various grid-related technologies, middleware, and applications. The GCC conference has become one of the largest scientific events worldwide in grid and cooperative computing. The 6th international conference on grid and cooperative computing (GCC2007) Sponsored by China Computer Federation (CCF),Institute of Computing Technology, Chinese Academy of Sciences (ICT) and Xinjiang University ,and in Cooperation with IEEE Computer Soceity ,is to be held from August 16 to 18, 2007 in Urumchi, Xinjiang, China.     

Information for Authors

正http://www.zju.edu.cn/jzus http://www.springerlink.com Aim The Journals of Zhejiang University-SCIENCE(A/B/C)are edited by the international board of distinguished Chinese and foreign scientists,and are aimed to present the latest developments and achievements in scientific research in China and     

Editorial:Brain-machine interface(BMI) and cyborg intelligence

正Brain-machine interfaces(BMIs)aim at building a direct communication pathway between the brain and an external device,and represent an area of research where significant progress has been made during the past decade.Based on BMIs,mind information can be read out by neural signals to control     

Information for Authors

正http://www.zju.edu.cn/jzus http://www.springerlink.com Aim The Journals of Zhejiang University-SCIENCE(A/B/C)are edited by the international board of distinguished Chinese and foreign scientists,and are aimed to present the latest developments and achievements in scientific research in China and overseas to the world’s scientific circles,especially to stimulate