LXI仪器零配置发现机制的研究

分析了基于VXI- 11协议实现的LXI总线发现机制的工作原理及其存在的问题,研究了零配置网络协议的原理.按照LXI标准的规定,基于mDNS/DNS-SD协议,在S3C2440的嵌入式Linux系统平台上设计实现了LXI仪器零配置发现机制.试验表明,这种零配置发现机制的实现,解决了基于ONC-RPC协议的VXI-11发现机制中存在的发现速度慢、设备数量受限等问题,实现了仪器的主动发现机制.     

基于FIT AP的智慧网络MLUDN分类识别

针对用户域名分类识别精度较低,且过程较为复杂的问题,提出一种基于FIT AP的智慧网络网多标签用户域名分类识别方法,在无线网络的集中构架管理内,利用LWAPP协议构建数据与管理通道,并在AP与AC二者之间连接控制器,采用隧道管理方法,完成接入点服务配置、监控以及管理,利用接入控制器为无线接入用户的提供网络接入服务;经过条件熵、信息熵以及联合熵获取用户域名特征集合信息增益,进行智慧校园网络用户特征分类识别,完成用户域名与标签二者之间的关系区分,实现对用户域名特征的多标签分类识别.实验表明,提出的方法识别精度较高、过程简单,可应用于校园网络当中,实现校园网络优化.     

基于AODV的自动配置和Internet接入方法研究

提出了一种MANET中基于AODV路由协议的自动配置和Intemet接入方法，并在此基础上提出并实现了E-AODV系统；通过扩展AODV协议，E-AODV系统可以实现路由、IPv4／IPv6地址自动配置、域名系统和服务发现，并为MANET提供接入Intemet的能力；在移动自组织IPv6网络试验床上对E-AODV系统进行测试，测试结果验证了所提方法的有效性和可靠性。     

基于本体的陶瓷产品配置模型的获取

有效地获取陶瓷产品配置模型是陶瓷企业实施现大规模定制生产模式的前提。本文首先建立了用户需求本体和陶瓷产品配置本体,并实现了两本体之间的映射,在此基础上完成了用户需求知识向产品配置知识的转换,实现了陶瓷产品配置模型的自动获取。     

基于区块链的零知识位置证明系统设计

智能终端设备及定位技术的发展催生了许多基于位置的服务，如定点打卡服务（访问特定地点获取相应的奖励），这导致非法用户为了获取利益对位置服务器进行位置欺骗。因此，需要对用户提供的位置证书进行验证。但现有的位置证明系统在验证用户位置证书的同时对用户隐私保护并不周全，且用户对位置证书的控制并不灵活。基于区块链技术，提出一种分布式位置证明系统架构；进而在此架构基础上，引入零知识证明，提出一种零知识位置证明协议。架构与协议组成的零知识位置证明系统允许用户根据需求，自由选择披露的证书内容及位置精度，实现分级的位置隐私保护。     

网络常用术语翻译

SMTP简单邮件传输协议TCP传输协议IP网际协议AppleTalk可路由协议组IrDA红外线数据协议SLIP串行线路网际协议PPP点到点协议PPTP点到点隧道协议L2TP第二层隧道协议IPsecInternet协议安全NetBEUINetBIOS增强型用户接HTTP超文本传输协议UDP用户报文协议ARP地址解析协议ICMPInternet控制报文协议IGMPInternet组管理协议DNS域名系统WINSWindowsInternet名称服务UDP用户数据报协议CRC循环冗余码校验DHCP动态主机配置协议APIPA自动私有IP地址CIDR无类域内路由选择URL统一资源定位符NAT网络地址翻译器IANA…     

嵌入式设备中IPv6地址自动配置的实现方法

在嵌入式技术领域中,支持IPv6的嵌入式设备将是一个崭新的发展方向,地址自动配置是嵌入式设备基于IPv6网络互联的关键方式之一.本文探讨了无状态和有状态两种自动配置方式的运作机理和过程,在嵌入式协议栈中设计并实现了两种地址的自动配置.     

基于遗传算法的网络安全配置自动生成框架

合理配置网络安全设备以对信息系统实施必要的访问控制,是网络安全管理的一项重要任务。随着网络规模的不断扩大,各种用户权限之间会形成复杂的依赖关系,传统基于人工的方式配置网络访问控制策略,主要是依据业务系统的实际需求,按照最小权限的原则进行分配,这种分配方式忽略了权限之间的依赖关系,容易产生过授权的现象,从而为网络带来安全隐患。为解决该问题,提出了一个基于遗传算法的安全配置自动生成框架。首先,以网络规划信息和配置信息为基础,确定用户可能的权限,提取网络基础语义,构建相应的网络安全风险评估模型,实现不同安全配置的安全评估;然后,对网络中所有可能的安全配置进行合理编码,确定遗传算子和算法参数,生成初始种群;最后,通过遗传算法,自动选取较优个体来生成子代个体。该框架能够通过自动比较不同的安全配置下的网络安全风险,以及在可能的配置空间内自动搜索安全配置的最优解,来实现网络安全设备访问控制策略的自动生成。构造一个拥有20个设备、30个服务的模拟网络环境对该框架进行验证,在该模拟环境下,该框架能够在种群样本数目为150的条件下,不超过10次迭代即可找到较优的安全配置。实验结果充分表明,该框架能够根据网络的安全需求,自动生成合理的网络安全配置。     

UPnP家庭网关配置管理的设计

提出了数字家庭网关可运营、可管理的应用模式。这种家庭网关打破了现有家用网关业务单一的局限，不仅具有数字家庭网络设备的互操作性，而且能将电信宽带服务直接延展、推送到家庭网络设备上，实现自动配置服务器对家庭网络设备的远程配置管理，促进电信网络与家庭网络的融合与互动。将家庭内外网络多服务的自动配置和终端管理技术，与UPnP协议框架相结合，家庭网关不仅可以实现设备“零配置”接入网络、网络“透明性”数据传输，而且能够为电信网络提供可运营管理的服务能力，符合数字家庭的发展趋势。     

家庭网关的机顶盒零配置功能实现

IPTV业务目前的机顶盒放装方式对用户并不友好,需要人工上门安装,过程繁琐,操作历时长。为了提升用户的IPTV业务体验,改善IPTV业务流程,机顶盒放装需要得到提升。本文介绍了运营商的整体机顶盒零配置流程,基于家庭网关HG221GI,提供了一种实现家庭网关机顶盒零配置的方案。     

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