基于刻面分类模式的构件库检索方法

可复用软件构件的检索是构件库和软件复用领域研究的一个重要课题。基于刻面分类模式的检索方式拥有准确、高效的优势,因而得到了广泛应用。论文介绍了刻面分类模式的相关概念以及刻面树的创建方式,分析了基于刻面分类模式对软件构件库进行检索的规则,该规则将用户选择的刻面和术语通过合理的并和交运算组合生成数据库查询条件来完成检索。最后根据规则提出了相应算法以及刻面分类模式检索在实际构件库系统中的实现方法。     

基于刻面分类模式的构件库检索方法

可复用软件构件的检索是构件库和软件复用领域研究的一个重要课题。基于刻面分类模式的检索方式拥有准确、高效的优势,因而得到了广泛应用。论文介绍了刻面分类模式的相关概念以及刻面树的创建方式,分析了基于刻面分类模式对软件构件库进行检索的规则,该规则将用户选择的刻面和术语通过合理的并和交运算组合生成数据库查询条件来完成检索。最后根据规则提出了相应算法以及刻面分类模式检索在实际构件库系统中的实现方法。     

基于卷积神经网络的构件分类策略的研究

为了提高软件复用过程中构件检索的效率，分析了软件构件分类技术的优缺点以及构件特征，从构件刻面信息的角度，采用卷积神经网络技术，提出一种基于卷积神经网络的构件分类策略；利用卷积神经网络对构件刻面特征进行提取，减少人为因素，提高刻面信息提取精确性，并训练出基于卷积神经网络的构件分类模型，通过具体的实验，来论证该模型的准确性，以达到提高构件检索效率的目的。     

基于内容的交互式感性图象检索

随着信息化社会的到来及信息高速公路计划的实施,人们越来越多地接触到大量的图象信息,因此基于内容的图象检索已经成为当前的一个热门研究课题,并在多媒体数据库、电子图书馆、商标管理、医疗图象管理、公安系统、卫星图象管理等方面得到广泛应用。然而,大多数基于内容的图象检索系统主要是通过图象多维物理特征的相似性匹配来进行查询,而对于用户的爱好、情感等主观或感性化的因素则考虑较少。为了弥补这方面的不足,提出了一种基于内容的交互式感性图象检索方法。该方法采用交互式进化算法,并通过人机交互的方式,来将用户的直觉、情感等感性化的因素融入到进化过程,以便进行图象的交互式在线检索;针对在检索过程中,因进化的时间可能较长和因需要用户确定的适应度值较多而产生的用户疲劳问题,采用神经网络离线学习的方法来减轻用户疲劳,从而实现了根据用户的情感和基于图象内容的图象检索,并取得了较好的实验结果。     

基于WinCE的GPS定位验证系统设计与实现

基于对GPS应用广泛性的思考,设计并实现了一套验证GPS定位功能的原型系统。首先介绍了GPS定位相关原理、GPS通信协议和Windows CE操作系统内核映像定制步骤,然后依据GPS通信协议语句特征,提出一种GPS信息域获取方法,最后阐述了验证系统的GPS定位软件的关键部分的实现。此系统正确地验证了GPS定位功能,也证明所提出的GPS信息域提取方法的可行性。     

本体驱动的半结构化Web生物数据抽取

提出由本体驱动，并根据文档结构和特征匹配来进行信息定位和信息抽取的方法，并实现了一个用户指导的交互式信息抽取原型系统。有效地解决了信息抽取中涉及的同义词，一词多义等语义问题，以及数据项不完整和排序不固定的问题。     

领域本体和刻面描述相结合的构件检索研究

针对刻面描述的检索方法的不足,引入领域本体,提出领域本体和刻面描述相结合的构件检索模型,并对所提出的构件检索模型中的构件检索过程进行研究。分析语义推理过程,提出基于本体和刻面描述相结合的检索算法。最后,构建一个第三方物流信息化构件检索的系统对所提出的构件检索机制的检索效率进行验证分析。验证结果表明,领域本体与刻面描述相结合可以提高构件检索的查全率和查准率。     

脸部特征定位方法

脸部特征定位是人脸分析技术的一个重要组成部分，其目标是在图象或图象序列中的指定区域内搜索人脸特征(如眼、鼻、嘴、耳等)的位置．它可广泛应用于人脸检测和定位、人脸识别、姿态识别、表情识别、头部像压缩及重构、脸部动画等领域．近年来，该领域的研究有了较大的发展，为了让相关领域内的理论研究和开发人员对目前的进展有一个全面的了解，将近年来提出的脸部特征定位方法根据其所依据的基本信息类型，分为基于先验知识、几何形状、色彩、外观和关联信息等5类，分别作了介绍，同时，对各类方法的性能作了一些比较和讨论，对未来的发展作了展望．     

一种基于刻面分类描述的软件构件查询方法

该文分析了软件构件的刻面分类描述的特点,通过借鉴XML查询语言ApproXQL中树匹配的思想及其相关理论,提出了一种新的基于刻面分类的软件构件查询方法。该方法将基于刻面分类的构件XML描述文档映射为一棵构件树,将查询表达式映射为一棵查询树,通过构件树与查询树之间的匹配算法查找需要的软件构件。这种查询方法支持布尔查询和模糊查询,具有一定的张弛能力,能在保证一定查准率的基础上提高查全率。该方法适用于面向网络的跨构件库查询。     

软件构件的ATE表示及其聚类方法

提出一种自动标签提取(ATE)构件表示方法,并设计基于ATE的模糊聚类方法。ATE表示能够包含比刻面分类更多的有效信息,并克服构件刻面分类可能产生的主观因素影响。模糊聚类使构件摆脱传统聚类的硬划分模式,可分别隶属于不同的簇,对构件检索提供更好的支持。在原型构件库中的对比实验证明该方法的可行性与有效性。     

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.     

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.     

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.     

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     

SCIENCE CHINA Information Sciences SUBJECT INDEX TO VOLUME 57(2014)

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