科技期刊上网中的计费机制

讨论了科技期刊上网机制和计费系统的实现原理,并指出改进方案及进一步研究的方向。     

The evolution of a manufacturing Web site

The Boeing Commercial Airplanes Wing Responsibility Center (WRC) needed a way to communicate quickly and effectively between its various plant locations. An important requirement was the ability to provide a common means to update and disseminate information, such as vital organizational statistics, in a timely manner.Several Web applications were built for the site, providing data entry and validation, charting, reporting, paging, e-mail notification, automatic detection of broken links, and the ability to build and update pages without the knowledge of HTML or a Web authoring tool. The site and its applications work daily to support the people who build the wings for Boeing airplanes.     

科技期刊上网中的关键技术研究

文中结合实际开发过程,讨论了科技期刊网上发布过程中的两项关键技术：文档转换和中文全文检索技术,阐述了各项技术的难点所在,并指出了解决方案及进一步研究的方向。     

基于Web of Science的PageRank人才挖掘算法

高水平论文是优秀科技人才的标志性成果之一.聚焦Web Of Science(WOS)热点研究学科,在构建学术论文语义Neo4j网络图和挖掘出活跃科研社区基础上,利用PageRank人才挖掘算法实现对科研社区中优秀科研人才的挖掘.首先,对现有的人才挖掘算法进行详细研究和分析;其次,结合WOS论文数据对PageRank...     

网络无障碍与计算机专业教学整合研究

目前网络无障碍教育在计算机教育界中已成为一个新兴研究课题,本文探讨了网络无障碍的概念、国外的相关研究现状以及网络无障碍与计算机专业教学整合的必要性,并提出了网络无障碍与计算机专业课程教学整合的策略及相应的课程设置模块。     

Characterization of the evolution of a news Web site

The Web has become a ubiquitous tool for distributing knowledge and information and for conducting businesses. To exploit the huge potential of the Web as a global information repository, it is necessary to understand its dynamics. These issues are particularly important for news Web sites as they are expected to provide fresh information on current world events to a potentially large user population. This paper presents an experimental study aimed at characterizing and modeling the evolution of a news Web site. We focused on the MSNBC Web site as it is a good representative of its category in terms of structure, news coverage and popularity. Specifically, we analyzed how often and to what extent the content of this site changed and we identified models describing its dynamics. The study has shown that the rate of page creations and updates was characterized by some well defined patterns that varied as a function of time of day and day of week. On the contrary, the content of individual pages changed to a different extent. Most updates involved a very small fraction of their content, whereas very few were more extensive and spread over the whole page. By taking into accounts all these aspects, we derived analytical models able to accurately capture and reproduce the evolution of the news Web site.     

Research on Web service selection based on cooperative evolution

Web service selection, as an important part of Web service composition, has direct influence on the quality of composite service. Therefore, it has attracted many researchers to focus on the research of quality of service (QoS) driven Web service selection in the past years, and many algorithms based on integer programming (IP), mixed integer linear programming (MILP), multi-dimension multi-choice 0–1 knapsack problem (MMKP), Markov decision programming (MDP), genetic algorithm (GA), and particle swarm optimization (PSO) and so on, have been presented to solve it, respectively. However, these results have not been satisfied at all yet. In this paper, a new cooperative evolution (Co-evolution) algorithm consists of stochastic particle swarm optimization (SPSO) and simulated annealing (SA) is presented to solve the Web service selection problem (WSSP). Furthermore, in view of the practical Web service composition requirements, an algorithm used to resolve the service selection with multi-objective and QoS global optimization is presented based on SPSO and the intelligent optimization theory of multi-objective PSO, which can produce a set of Pareto optimal composite services with constraint principles by means of optimizing various objective functions simultaneously. Experimental results show that Co-evolution algorithm owns better global convergence ability with faster convergence speed. Meanwhile, multi-objective SPSO is both feasible and efficient.     

基于混合协同进化算法的Web服务组合演化策略

为了在服务组合演化过程中高效地选择满足服务请求的Web服务,提出了一种基于混合协同进化算法的Web服务组合演化策略。首先,利用改进模糊C均值聚类算法将Web服务演化单元按应用分类;然后,利用带权值的粒子群算法对划分好的子群进行内部择优;最后,对各个子群进行协同进化,使得针对用户服务请求,能够选出最优Web服务演化组合。实验结果表明,混合协同进化算法无论在算法稳定性或是算法运算时间上都优于传统协同进化算法,且对于Web环境下大量的服务请求能够提供优质、高效的服务。     

浅谈Web of Science数据库文献初级检索方法

笔者采用理论与实例相结合的方式,针对如何利用WOS数据库科学、高效检索信息,介绍了Webof Science数据库检索中常用的布尔逻辑算符、双引号和通配符等三种检索符号的使用方式,分析了Web of Science数据库中基本检索、被引参考文献检索和高级检索等三种检索功能的使用方法与技巧,以期为科研工作者高效利用WOS数据库的检索方法和技巧提供参考。     

基于Web的石油科技管理自动化办公系统

为提高科技管理的水平和效率,采用计算机软件的工作流模式是目前最佳的解决之道.以.NET框架为基础所设计开发的面向石油科技管理的网络办公软件系统,其内容包括有项目的申报、审批、跟踪管理、验收等各个工作流程.可以大大提高科技管理的水平和效率.该系统采用了完全的Web开发模式,在面向对象、COM组件、网络报表打印技术和网络统计图生成技术等方面均有一定程度的创新,也可为同类软件的设计提供借鉴作用.     

用于科技基础条件平台的服务合成研究与应用

Web服务之间的交互是面向服务的体系结构(Service-Oriented Architecture,SOA,也称为面向服务架构)中的关键问题.单个Web服务提供的功能往往不能完全满足用户的实际需求,将多个Web服务进行合成实现功能更为强大的服务是SOA必须要解决的问题之一.分析了Web服务合成的研究现状,介绍了Web服务合成方式的分类和商业流程执行语言BPEIAWS,给出了"科技基础条件平台应用服务支撑系统"项目中SOA的设计方案,描述了Web服务合成的关键步骤.该研究成果成功地应用于科技基础条件平台应用服务集成之中,并已通过科技部的前期验收.     

用于科技基础条件平台的服务合成研究与应用

Web服务之间的交互是面向服务的体系结构（Service-Oriented Archimcmre,SOA,也称为面向服务架构）中的关键问题。单个Web服务提供的功能往往不能完全满足用户的实际需求．将多个Web服务进行合成实现功能更为强大的服务是SOA必须要解决的问题之一。分析了Web服务合成的研究现状,介绍了Web服务合成方式的分类和商业流程执行语言BPEL4WS,给出了“科技基础条件平台应用服务支撑系统”项目中SOA的设计方案．描述了Web服务合成的关键步骤。该研究成果成功地应用于科技基础条件平台应用服务集成之中,并已通过科技部的前期验收     

Web Services as Building Blocks for Science Gateways in Astrophysics

An efficient exploitation of Distributed Computing Infrastructures (DCIs) is needed to deal with the data deluge that the scientific community is facing, in particular the Astrophysics one due to the emerging Square Kilometre Array (SKA) telescope that will reach data rates in the exascale domain. Hence, Science Gateways are being enriched with advanced tools that not only enable the scientists to build their experiments but also to optimize their adaptation to different infrastructures. In this work we present a method, called “two-level workflow system”, to build this kind of tools and we apply it to a set of analysis tasks of interest for some use applications to the SKA. This method uses the Software-as-a-Service model to keep the scientists insulated from technical complexity of DCIs, and the COMPSs programming model to achieve an efficient use of the computing resources.     

网络科技信息自动监测服务系统的建设

监测科技领域的变化情况,洞察科技领域的发展态势是文献情报机构的一项重要任务.在国家科技支撑计划项目和中国科学院项目的支持下,国家科学图书馆开发了适用于领域监测的“网络科技自动监测系统”,这一系统的建设目标是帮助战略情报研究团队全面及时地跟踪监测特定领域内一些重要科研机构发布的网络信息资源, 通过信息的采集、知识抽取、信息分析等技术,有效揭示目标科研机构在战略规划、研究布局、重要研究进展等方面的重要动态信息,深入反映领域内的科技创新态势.这一系统已在相关的战略情报研究团队中实际应用,取得了很好的服务效果.论文研究了网络科技信息自动监测系统的建设思路、技术框架和具体的系统实现情况,并对应用效果进行了总结分析.     

Understanding links: Web Science and hyperlink studies at macro,meso and micro-levels

Web Science has favoured macroscopic approaches which have revealed much about the Web's structural patterns. We argue that contextualised knowledge about hyperlinks on the Web has not advanced at the same rate and that complementary intermediate and micro-scale investigations are essential for a better understanding of the motivations, functions and meanings of these links.

We present an investigation that attempted to overcome the shortcomings of current theoretical frameworks and methodological techniques. The focus of this article lies in the demonstration of the viability of studying the web at different scales of analysis without loss of coherence guided by the assumption of the Web as media.

Results of our quali-quantitative, multi-scale and study of the international connectivity of websites registered in Brazil are presented. At the macro-scale, previous indications of high international connectivity are confirmed. Intermediate (meso) and micro-scale analyses focused on the connectivity between Brazilian and German websites and contradicted the conclusions about the meanings and functions of hyperlinks commonly associated with structural analysis. Links between Brazilian and German websites were shown to derive from a large number of formal and generic links, challenging the prevalent association that large quantities of incoming links are an indication of high relevance.