基于lnter0P Stack的新一代平台互操作技术

介绍了Intemet上平台互操作的最新技术InterOP Stack的体系结构、协议栈、应用实例以及未来的发展方向.     

基于Web服务的企业应用集成

Web Services是一种面向服务的体系结构，它通过使用标准XML和SOAP等标准协议，可以将各种异构系统方便、快捷地集成到现有系统中，有力地推动了EAI（企业应用集成）实施，尤其是为B2B电子商务应用交互集成提供了优质、廉价的解决方案。介绍了企业应用集成，然后在剖析了Web服务的体系结构和关键技术的基础上，提出了基于Web服务的企业应用集成解决方案。最后通过实例，讨论了一个典型的基于Web服务的应用集成框架。     

基于CPC和VPN的B2B电子商务的研究

提出了利用CPC和VPN技术构建B2B电子商务的理念。该系统以CPC为企业信息和管理无缝集成的平台，以服务为根本，以VPN为物理上的网络支撑，通过Internet技术，将面向上游供应商的采购业务和下游代理商的销售业务有机联系起来，提供整合的服务体系，有效地解决了B2B电子商务中存在的信息集成和网络安全问题。最后以工程应用实例验证了该B2B电子商务理论框架的可行性。     

基于服务多代理的集成供应链系统

供应链管理在快速多变的全球环境下竞争，对集成供应链信息系统提出了新的要求。该文分析了多代理系统在集成供应链中的应用及Web服务技术，提出了基于服务多代理技术实现集成供应链系统的模型，解决了基于多代理的供应链成员信息系统在跨Internet集成技术实现上的困难。     

电力系统中的语音应用技术研究

随着电力市场的发展，电力系统对信息的处理能力进一步提高。从传统的语音报警到实时语音信息访问和语音控制，语音应用技术在电力系统中都得到应用。一种基于现有Internet基础构架的语音服务标准VoiceXML是网络与电话技术完美的结合，制定了通过语音对话访问Web服务和交互语音问答的传递标准。VoiceXML使得开发人员从底层开发脱离出来，而直接面向应用提供解决方案；用户可以通过计算机或者电话，用语音访问Internet服务。该文描述了电力系统中语音技术的应用，并着重于VoiceXML标准给出了语音在电力系统中的应用解决方案。     

CORBA与Web服务的比较与集成

CORBA作为成熟的分布式计算标准，主要用来构造企业内部事务紧急的应用，Web Services是近年来提出的一种新的面向服务的体系结构，主要用来开发基于Internet的服务。针对CORBA在Internet环境下数据共享和应用集成的局限性，提出了CORBA与Web Services集成的方案，设计了集成网关并研究了集成中的关键问题：接口映射转换、消息类型转换和CORBA对象的动态调用。     

基于Web服务的企业应用集成

Web Services是一种面向服务的体系结构,它通过使用标准XML和SOAP等标准协议,可以将各种异构系统方便、快捷地集成到现有系统中,有力地推动了EAI(企业应用集成)实施,尤其是为B2B电子商务应用交互集成提供了优质、廉价的解决方案。介绍了企业应用集成,然后在剖析了Web服务的体系结构和关键技术的基础上,提出了基于Web服务的企业应用集成解决方案。最后通过实例,讨论了一个典型的基于Web服务的应用集成框架。     

基于Web Service技术的民航B2B动态电子商务应用

使用动态电子商务是电子商务发展的目标,而Web服务是其核心技术,也是Web的下一个革新。Web服务作为Internet上新兴的应用通信和集成技术,将改变企业之间的商务运作和企业对企业(B2B)的应用设计与开发。该文通过对动态电子商务应用的研究,着重讨论了基于WebService的系统集成技术,并通过实际的开发实例,介绍了如何实现航空公司B2B动态电子商务应用。     

Google map的数据管理和表现机制的讨论研究

Google作为全球最大的搜索引擎,将GoogleMap加入其服务范围内,它集成了全球不同分辨率的遥感图像。Ajax技术改变了传统的客户端与服务器端进行交互的方式,进一步提高了GoogleMap的友好交互界面,增强了其服务质量。     

Prophetstor携手Red Hat扩展OpenStack存储模块

正软件定义存储(SDS)厂商ProphetS tor希智数据宣布加入Red Hat Open Stack云基础架构合作伙伴网络,为Red Hat Enterprise Linux Open Stack平台提供集成的ProphetS tor Federator SDS解决方案。Red Hat全球技术生态系统高级总监Mike Werner表示:"我们很高兴ProphetStor希智数据加入Red Hat Open Stack云基础架构合作伙伴网络。为了帮助客户充分利用Red Hat Enterprise Linux OpenStack平台和我们的开放式混合云解决方案,我们与ProphetS tor希智数据等技术公司密切合作,提供强大的补充性解决方案。我们期     

可信计算软件构架的检测研究

介绍了TSS体系结构和TSP对象及其对象之间的关系,通过一个基于可信计算的数据密封程序,分析如何调用TPM驱动程序,如何使用驱动程序中各个对象,纵向说明了可信计算软件运行架构和过程;实验以tpm_emulator0.7.1模拟TPM芯片,验证了文件密封的过程和TSS的工作原理,展示了TPM芯片模拟、核心驱动程序、应用程序的三者之间的相互调用关系;对基于可信计算的软件编程起到很好的指导作用。     

Ordered Hypothesis Machines

Stack Filters are a class of non-linear filter typically used for noise suppression. Advantages of Stack Filters are their generality and the existence of efficient optimization algorithms under mean absolute error (Wendt et al. in IEEE Trans. Acoust. Speech Signal Process. 34:898–910, 1986). In this paper we describe our recent efforts to use the class of Stack Filters for classification problems. This leads to a novel class of continuous domain classifiers which we call Ordered Hypothesis Machines (OHM). We develop convex optimization based learning algorithms for Ordered Hypothesis Machines and highlight their relationship to Support Vector Machines and Nearest Neighbor classifiers. We report on the performance on synthetic and real-world datasets including an application to change detection in remote sensing imagery. We conclude that OHM provides a novel way to reduce the number of exemplars used in Nearest Neighbor classifiers and achieves competitive performance to the more computationally expensive K-Nearest Neighbor method.     

The structure and dynamics of knowledge network in domain-specific Q&A sites: a case study of stack overflow

Programming-specific Q&A sites (e.g., Stack Overflow) are being used extensively by software developers for knowledge sharing and acquisition. Due to the cross-reference of questions and answers (note that users also reference URLs external to the Q&A site. In this paper, URL sharing refers to internal URLs within the Q&A site, unless otherwise stated), knowledge is diffused in the Q&A site, forming a large knowledge network. In Stack Overflow, why do developers share URLs? How is the community feedback to the knowledge being shared? What are the unique topological and semantic properties of the resulting knowledge network in Stack Overflow? Has this knowledge network become stable? If so, how does it reach to stability? Answering these questions can help the software engineering community better understand the knowledge diffusion process in programming-specific Q&A sites like Stack Overflow, thereby enabling more effective knowledge sharing, knowledge use, and knowledge representation and search in the community. Previous work has focused on analyzing user activities in Q&A sites or mining the textual content of these sites. In this article, we present a methodology to analyze URL sharing activities in Stack Overflow. We use open coding method to analyze why users share URLs in Stack Overflow, and develop a set of quantitative analysis methods to study the structural and dynamic properties of the emergent knowledge network in Stack Overflow. We also identify system designs, community norms, and social behavior theories that help explain our empirical findings. Through this study, we obtain an in-depth understanding of the knowledge diffusion process in Stack Overflow and expose the implications of URL sharing behavior for Q&A site design, developers who use crowdsourced knowledge in Stack Overflow, and future research on knowledge representation and search.     

What Security Questions Do Developers Ask? A Large-Scale Study of Stack Overflow Posts

Security has always been a popular and critical topic. With the rapid development of information technology, it is always attracting people’s attention. However, since security has a long history, it covers a wide range of topics which change a lot, from classic cryptography to recently popular mobile security. There is a need to investigate security-related topics and trends, which can be a guide for security researchers, security educators and security practitioners. To address the above-mentioned need, in this paper, we conduct a large-scale study on security-related questions on Stack Overflow. Stack Overflow is a popular on-line question and answer site for software developers to communicate, collaborate, and share information with one another. There are many different topics among the numerous questions posted on Stack Overflow and security-related questions occupy a large proportion and have an important and significant position. We first use two heuristics to extract from the dataset the questions that are related to security based on the tags of the posts. And then we use an advanced topic model, Latent Dirichlet Allocation (LDA) tuned using Genetic Algorithm (GA), to cluster different security-related questions based on their texts. After obtaining the different topics of security-related questions, we use their metadata to make various analyses. We summarize all the topics into five main categories, and investigate the popularity and difficulty of different topics as well. Based on the results of our study, we conclude several implications for researchers, educators and practitioners.     

IA-64架构的寄存器机制的几点研究

IA－64架构是Intel公司开发出的新一代64位微处理器体系结构，它的设计思想介于传统的RISC（精简指令集计算机）和并行处理器之间，其特殊的寄存器栈机制为应用程序提供了大量可用的通用寄存器，作者对支持IA－64的编译器进行了设计和实现，过程了IA－64的寄存器结构，寄存器栈轮转做了一些深入研究，本文对比传统处理器架构中的寄存器结构，对该寄存器栈机制在编译器中实现的重要特点进行了阐述。     

CAN总线与Ethernet互联网关的设计

在对CAN协议及TCP/IP协议栈进行深入研究的基础上,设计了以太网与CAN总线互联网关,该设计可以实现基于TCP/IP协议的计算机网络设备与基于CAN总线协议的底层现场网络互联。通过Visual C＋＋6.0编写了网关上的程序使用了MSComm和WinSock控件提供串口通信和TCP/IP通信功能,通过数据包发送和接收实验表明Can-Ethernet网关设计的有效性。     

STATE ESTIMATION WITH STACKS AND INTERPOLATING FUNCTIONS FOR DYNAMIC SYSTEMS WITH MISSING OBSERVATIONS AND NONLINEAR INTERFERENCE*

Stack sequential schemes and interpolating functions are used to estimate the states of general discrete dynamic models with missing observations and containing nonlinear random interference. The proposed scheme is faster than the estimation based upon the Viterbi algorithm.     

基于VxWorks的USB键盘驱动开发研究

通过时基于Atmel公司的AT91RM9200微处理器的USB主驱动协议栈进行分析,根据USB键盘初始化和连接的顺序,通过一些具体的函数介绍,详细介绍了在嵌入式实时操作系统VxWorks下的USB键盘驱动开发的过程,包括了初始化过程及其一个USB键盘的启动过程.     

Linux协议栈在网络处理器上的移植

本文介绍了网络处理器的体系结构和编程模型,以及Linux网络协议栈的结构。提出移植Linux网络协议栈到IntelIXP网络处理器的基本方法,和使用微引擎C语言实现时需要解决的问题。最后分析了本实现的性能。     

基于FPGA的IPv6精简协议栈的设计

研究了IPv6精简协议栈的FPGA硬件实现,分析了各个模块的功能。编写了硬件结构的Verilog HDL模型,进行了仿真和逻辑综合,并成功用ALTERA的FGPA 对协议栈进行了验证。仿真和实验结果证明,所设计的硬件达到了设计要求,使小设备接入网络更加方便快捷。