基于业务模型和聚类算法的构件设计方法

针对业务构件设计一直是基于构件的企业信息系统软件开发中的研究难点这一问题，该文给出了一种基于UML语言，由业务功能视图、业务实体视图、业务组织视图、业务控制视图组成的业务模型描述方法。并在业务模型语义分析的基础上建立起聚类算法的样品间及类间关联值的计算公式，有效地将聚类算法引入业务构件划分过程，并通过谱系聚类图来确定构件划分的最优设计结果。给出了业务构件接口设计的关键步骤和方法，为构件划分和设计提供了一套可遵循的参考标准，以有效提高构件设计的质量。     

面向功能构件的软件构件识别方法研究

为了从功能构件中识别出低耦合、高聚合的软件构件,分析了软件构件识别问题,提出了基于业务行为关系的软件构件识别方法,详细介绍了该方法的原理与过程。最后给出一个应用示例,说明方法的合理性和有效性。     

基于业务模型稳定性的构件粒度优化设计

构件粒度在很大程度上影响着构件的复用性能，但目前尚缺乏严格有效的方法以支持对构件粒度的优化设计．以特征空间作为表达业务模型与构件语义的统一方式，给出了构件粒度的定量度量方式，并探讨了业务模型空间与构件空间之间的四种映射机制．通过分析构件粒度与业务模型稳定性之间的关系。提出基于模型稳定件的动态粒度构件设计思想，从异构体数目、稳定熵、相似度三个方面的稳定性进行度量，进而给出了基于最大稳定集的构件识别算法STCIM，实例验证与理论对比分析证明了STCIM相对于其它构件识别方法在目标构件复用性能优化方面的优越性．     

一种利用功能驱动的构件组装方法研究

从构件组装研究背景出发,提出一种利用功能驱动的构件组装方法,该方法是建立在一种有向图表示的软件体系结构模型上,以构件为基本元素,以用户的功能需求为驱动目标,以构件连通度和功能冗余度为评价指标,达到构件的自动组装并能提供满足用户需求期望的软件实体.最后根据构件的邻接矩阵和可达矩阵设计了一种组装算法,并给出了实验仿真结果.     

基于深度学习的医疗命名实体识别

在较为深入地研究医疗文本实体识别的现有方法的基础上,设计一种基于深度学习的医疗文本实体识别方法。本文在医疗文本数据集上进行实体识别对比实验,所识别目标实体包含疾病,症状,药品,治疗方法和检查五大类。实验结果表明,设计的深度神经网络模型能够很好的应用到医疗文本实体识别,本文所设计的方法比传统算法（如CRF）具有较少人工特征干预及更高的准确率和召回率等优点。     

机构概念设计符号方案的自动识别

为了从基于设计规则的机构创新设计自动化方法创成的、以符号表达的概念设计方案中快速遴选出具有创新性的设计方案,根据符号方案中功能构件和构件状态数之间的关系,给出了动力机构和基本机构识别的邻接矩阵遍历算法.用计算机化规则描述5种常见的基本机构之间的连接关系,给出了识别符号方案基本机构连接关系的遍历算法. 由此,实现了符号方案的基本机构及其连接关系的自动化识别.     

可信业务构件的框架模型及其实现机制

目前,对于业务构件模型的研究主要是关注于业务构件的识别和描述方法两方面,而业务构件的质量则较少得到关注。质量必然是满足构件使用者的基本前提,而业务构件的可信则全面体现了业务构件的质量。本文提出了可信业务构件的框架模型和四大可信要素,同时给出了可信要素的实现机制,重点阐述了逻辑可信的实现机制。     

基于特征的构件模型及其规范化设计过程

基于构件的软件复用是解决软件危机的重要手段,但目前还缺乏规范化的模式和方法以支持具有高复用性能的构件的识别与设计,借助特征空间作为工具以解决上述问题.首先介绍特征与特征空间的概念,从特征变化的相互依存关系入手,提出特征依赖的概念和4种具体的特征依赖.在此基础上,给出了基于特征空间的构件模型,使用特征的"型-值"机制与特征依赖表达构件的复用性.然后讨论了构件复用度的度量手段和规范化设计的目标,提出4种构件规范化模式(原子模式、基本模式、框架模式和内聚模式),研究了以特征空间分解为基础的规范化方法,并通过实例加以验证.该方法实现了多粒度、多模式构件的共存和构件间基于组合的松散耦合,从而提高了构件的复用效率并降低复用成本.结果在企业资源计划(enterprice resource planning,简称ERP)系统的构件化设计与开发中得到广泛应用,对指导构件设计具有较高的理论与实践价值.     

全国山洪灾害防治规划信息系统的设计与实现*

分析了山洪灾害防治规划各类数据及各级用户的业务需求,采用基于构件的柔性软件工程的思想,以C/S为主体开发模式,给出了构件化开发的流程,构建了系统的体系结构,开发了全国山洪灾害防治规划信息系统.该系统提出了一种基于树型数据结构的"超"实体多级递归算法,探索了一种智能信息呈现技术,对全国及各省(市、区)山洪灾害防治规划密切相关的各类基本数据、图件及全部规划成果进行了有机管理.     

复杂实时系统软构件对象设计

该文给出了用于实时多任务应用系统图形化设计软件各层次软构件对象的设计方法。第一部分介绍图形化设计语言,第二部分定义了图形设计的构件对象。首先定义高层应用对象,使应用的架构为C/S结构;其次定义了在设计分解过程中用到的样式、复合对象及接口对象;最后描述底层原子对象,为实时执行器操纵的实体及其行为建模。     

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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