V2C＋＋——一个用C＋＋实现的VHDL翻译型模拟器

由于面向对象的Ｃ＋＋语言更贴近描述硬件对象的ＶＨＤＬ语言Ｃ＋＋实现翻译型ＶＨＤＬ模拟器，并利用Ｃ＋＋本身的编译器的优化功能，可以得到运行的时间和空间方面效率较高的ＶＨＤＬ模拟器，Ｖ２Ｃ＋＋的原型设计和初步实践表明，用Ｃ＋＋实现ＶＨＤＬ翻译性模拟器比解释性模拟器具有较高效率，利于较大规模的电路的模拟。     

DPC—C＋＋语言的并发性实现

ＤＰＣ－Ｃ＋＋语言是一个支持分布式应用程序设计的面向对象的并发程序设计语言，本文侧重介绍了ＤＰＣ－Ｃ＋＋语言的并发性实现及其程序模型，并简要给出其运行支持系统的设计。     

C＋＋与Fortran混合语言编程中动态链接库的调用

绍了Ｃ＋＋和ＦＯＲＴＲＡＮ９０混合语言编程中,在Ｃ＋＋中调用Ｆｏｒｔｒａｎ动态链接库（ＤＬＬ,Ｄｙａｎａｍｉｃ Ｌｉｎｋ Ｌｉｂｒａｒｙ）的方法以及参量传递、函数调用等的方法。     

动态C^＋＋对象的复用

机械设计目前已全面应用ＣＡＤ方法即借助电脑软件实现建模及修改等。为了利用Ｃ＋＋的类封装机制，人们常常开发基于Ｃ＾＋＋的高层面向对象语言来编制机械设计软件。带有虚拟函数或虚拟基类的Ｃ＾＋＋对象包含动态内存指针，这些指针超出创建它们程序生存期即告无效，但开发基于Ｃ＾＋＋的高层面向对象语言必须使用稳固对象。本文分析隐含指针问题并讨论实现对象转储的途径。     

面向对象数据库无缝的C^＋＋应用编程界面

关系数据库与程序设计语言之间的松散耦合存在着编程范型及类型系统两方面的失配，是提高数据库应用软件之质量和生产率的极大障碍，面向对象数据库（ＯＯＤＢ）与程序设计语言（ＰＬ）的无缝结合旨在消除这种失配，本文以面向对象数据库管理系统原型ＯＳＣＡＲ为背景，提出ＯＯＤＢ与ＰＬ无缝结合的基本准则，ＯＯＤＢ无缝Ｃ＾＋＋应用编程界面的对象持久性模型，以及实现ＯＯＤＢ无缝Ｃ＾＋＋应用编程界面的关键技术。     

用C＋＋实现OODB中对象多版本

作者利用Ｓｙｂａｓｅ作底层的数据存储，在Ｃ＋＋中扩展了永久类，实现了ＯＯＤＢ的一个重要功能，文中讨论的是在此基础上，利用Ｃ＋＋语言重载能力，和关系数据库便于集合操作的特性，扩展我版本类，实现ＯＯＤＢ对象多版本。     

一种并行程序设计语言C＋＋^1

该文介绍了一种较新的并行程序设计语言ＣＣ＋＋，该语言在顺序Ｃ＋＋语言的基础之上扩充而来的，该文对扩充的８种结构一一进行了分析，并介绍了具体使用方法，从而说明ＣＣ＋＋具有效的语言表示能力。     

基于ODBC的VisualC＋＋应用程序设计研究

本文简要介绍了ＯＤＢＣ的工作原理，基于ＯＤＢＣ开发ＶｉｓｕａｌＣ＋＋应用程序，重点就ＭＦＣ与ＯＤＢＣ驱动程序管理器的运行机制进行分析研究，给出了部分应用实例。     

C^＋＋的设计背景,原则及与OOP的关系

本文介绍了Ｃ＾＋＋语言的设计思想，指导原则。将Ｃ＾＋＋语言与其他面向对象程序设计语言以及Ｃ语言作了一些比较，讨论了它的面向对象机制及与ＯＯＰ的关系。     

面向衫的C＋＋类库的构造

面向对象程序设计（ＯＯＰ）是九十年代程序设计发展的主注以及Ｃ＋＋是面向对象程序设计语言中最流行的一种，但一些因素严重影响着Ｃ＋＋语言的产及使用其中最主要的一点就是Ｃ＋＋缺乏实用，方便的公用类库，本文介绍了两个Ｃ＋＋语文类库的构造。     

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.     

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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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