网络信息服务

At present one-stop network popularizes platform to pay close attention to and be able to apply extensively by more and more enterprises, the network that the advantage that it has depends on popularizing platform to be able to realize much platform through one-stop network spreads the effect, cooperate overall business affairs message with professional search at the same time the service is aggregate discharge of many pure green business affairs, for the enterprise promotion was brought true click the business affairs discharge with efficient green, the gender overturns in the meantime changed the past to click the network that pays fee to extend pattern, effective control ill will clicks what bring the waste on resource cost and information feedback for the enterprise not to coordinate a phenomenon, through the free own help that build a station more does not have a website and need has the company of network promotion, a series of networks such as the website that has oneself on the base that does not raise any cost cost extend a service.

现在一站式的网络推广平台正被越来越多的企业关注并得以广泛应用，它所具有的优势在于通过一站式的网络推广平台便可实现多平台的网络推广效果，同时以专业的搜索配合全面的商务信息服务聚合了大量的纯绿色商务流量，为企业推广带来了真实点击和高效绿色的商务流量，同时颠覆性的改变了过去点击付费的网络推广方式，有效控制恶意点击为企业带来资源成本上的浪费以及信息反馈的不协调现象，通过免费的自主建站帮助更多没有网站而需要进行网络推广的企业，在不增加任何成本费用的基础上拥有自己的网站等一系列网络推广服务。

The thesis studies the difference between GWSs composition and traditional workflow applications, proposes the implement mechanism and technical architecture of GWSs composition and defines the reference model of GWSs composition platform, which provide holistic framework and top-level guidance for studying dynamic GWSs composition technology, designing GWSs composition platform, and implementing representative composite service applications.2、Theories and methods of composite process modeling and process analysis. This thesis proposes a meta-model of Geo-spatial Web services composition process defining from two aspects, i.e. process and resource. According to the process definition meta-model, we propose a new Geo-spatial Web services composition Process/Resource model based on extended WF-net, which effectively resolves the problems on uncertain activity option and dynamic variation of service in composite process model. A notion with regard to soundness of process model is proposed from three aspects, i.e. the structural correctness of process model, validity of data link and validity of resource. The notion of soundness definitely gives a dividing line on correctness of composite GWS process. This thesis analyzes sufficient and essential terms of soundness, and studies compositional property of WSCP/R-net models which provides an effective method to construct a soundness WSCP/R-net model. According to WSCP/R-net, the thesis proposes composition algebra and studies the properties of it. Based on the composition algebra, 6 kinds of composite process reduction rules are induced to optimize the process.3、Geo-spatial Web service QoS model and its application architecture. This thesis proposes an extendable GWS QoS model from three aspects, i.e. Geo-spatial Web Service itself, networking conditions and service consumer which can be used to distinguish GWSs with overlapping or identical functionality. We work over the QoS evaluation methods of composite GWS process which can be used to guide the execution, monitor and service selection of composition process. Aming at some disadvantages in traditional Web service discovery model for its lacking of QoS supporting, this thesis proposes a new service discovery model SDMQ supporting QoS constraints.4、Technologies of composite service executing. SSPL, a new composite service process language, is defined to overcome the disadvantages of existing composite services process languages which can not adapt to the dynamic variation of Geo-spatial Web Services. An algorithm is described to translate WSCP/R-net model into SSPL. The thesis studies the model of dynamic services selection with QoS global optimization, presenting an algorithm GODSS to resolve dynamic services selection with QoS global optimization in GWSs Composition.5、Design and implement experimental system and representative applications. According to the research findings presented above, we design and implement an experimental system and construct two representative applications to show that our achievements are effective and practical.

针对当前空间信息服务聚合研究中存在的若干不足，本文重点在基于工作流的空间信息服务聚合框架、空间信息服务聚合流程建模和分析技术、空间信息服务QoS模型及应用体系以及空间信息服务聚合流程执行等几个方面进行深入研究，主要工作和创新点包括：1、基于工作流的空间信息服务动态聚合框架：研究了空间信息服务动态聚合和传统工作流应用的不同，在此基础上提出了基于工作流技术的空间信息服务动态聚合实现机制、技术体系和参考模型，为研究空间信息服务聚合的关键技术、开发服务聚合支撑平台以及在此基础上构造特定的空间信息服务聚合应用提供了总体框架和顶层指导。2、空间信息服务聚合流程建模和分析技术：首先基于动态服务聚合流程建模的需求和空间信息服务动态变化的应用实际，从服务聚合的过程维和资源维出发定义了服务聚合流程定义元模型；与之相对应，对基本的WF-net进行扩展，提出服务聚合流程/资源网作为空间信息服务聚合流程的形式化描述模型，有效解决了现有的基于基本Petri网和工作流网的服务聚合建模方法所不能解决的不确定路径选择和服务的动态变化性问题；从流程结构正确性、数据依赖有效性和资源实现有效性三个方面提出了WSCP/R-net健壮性的概念，明确界定了聚合流程正确性的标准，并对WSCP/R-net模型的健壮性分析方法和WSCP/R-net模型的组合特性进行了研究；提出了空间信息服务聚合代数算子并对其性质进行了研究，在此基础上提出了6种聚合流程约简规则，从而可达到优化聚合流程、提高聚合流程执行效率的目的。3、空间信息服务QoS模型和应用体系：从服务本身、网络环境和服务消费者三个层次出发，提出了一个可扩展的空间信息服务QoS模型GSQM，实现了对空间信息服务的度量和评价，并对GSQM不同质量要素信息的客观、公正采集方法进行了研究；研究了空间信息服务聚合流程QoS评价方法，有效支持了空间信息服务聚合流程的执行、监控以及服务选择等操作；针对目前的服务发现模型仅支持服务功能性描述、不能有效满足空间信息服务应用需求的现状，提出了一种新的支持QoS约束的服务发现模型SDMQ，并对模型的实现框架进行了研究。4、空间信息服务聚合流程执行技术：针对现有的服务聚合流程描述语言不能有效满足空间信息服务动态聚合流程描述的特点，基于BPEL4WS提出了一种新的空间信息服务聚合流程描述语言SSPL；研究了满足健壮性要求的WSCP/R-net模型向SSPL的转换算法，在此基础上可以满足用户无显式编码来实现空间信息服务聚合应用的目的；研究了服务动态选择QoS全局优化模型，并在此基础上提出了一种解决服务动态选择QoS全局优化问题的实现算法GODSS.5、基于论文研究成果，设计实现了"空间信息服务聚合实验系统"，并构建了"矿产资源评价"和"城市消防应急响应"两个典型应用案例，对论文所述模型、方法的可行性和有效性进行了验证。

Who communicates by letter, business synthesizing service as a telecommunication , data and information network to be in motion and do business, advantage , broad customer resource and fine cooperation concern the have distinctive telecommunication background , tremendous technology and fund, The company is engaged in synthetical telecommunication serving , synthesizing information service , broadband access , computer network information system integration , intelligent building structure-rization synthetical arrangement of wire system , building world automation navar , data telephone programme-controlled telephone switching boards system , video frequency convention system and so on mainly; Be in the data communication field , the new net of halo especially .

北京光环新网数字技术有限公司是北京通信光环电信集团下属的一家股份制公司，作为一个电信、数据和信息网络综合服务运营商，具有独特的电信背景、雄厚的技术和资金优势、广泛的客户资源和良好的合作关系，公司主要从事综合电信服务、综合信息服务、宽带接入、计算机网络信息系统集成、智能大厦结构化综合布线系统、楼宇自动化控制系统、数据电话程控交换机系统、视频会议系统等；尤其在数据通讯领域，光环新网公司拥有其它公司无法比拟的综合技术实力和线路网络资源优势。

The paper introduces the advanced information service system and service modes at present,including OPAC,OCLC,the new development of SDI,full text database and the integrated information system.

介绍了目前比较先进的文献信息服务系统和服务方式，包括OPAC ，OCLC ，定题服务的新发展，全文数据库及最新的资源整合系统等，以信息服务的评价原则为依据，归纳了网络环境下文献信息服务的特点及发展趋势

Abstract〕in network environments,information services and core works of university libraries have alternated,while the cataloging of university libraries has changed,which characterizes the socialization of cataloging service,diversification of cataloging objects,and normalization and standardization of cataloging data.catalogers have to perform their new roles such as quality control for cataloging data,cataloging of non-book resources, and building special databases.in order to adapt to the new demand in the library's cataloging,catalogers should transform their roles,improve their special quality,and be active in innovation.

摘 要〕网络环境下，高校图书馆信息服务功能和核心业务的发生转变，编目工作也向编目服务的社会化、编目对象的多元化和编目数据的规范化和标准化等方向发展。编目人员的职能转向书目数据的质量控制、非书资源的编目、特色数据库的建设与信息服务等新的领域。编目人员必须调整专业知识结构，提高业务水平，才能适应网络环境下编目工作的要求。

Maggie Xu joined the eBay EachNet since 2001. She is a Leading Counsel and Vice President of eBay EachNet , Deputy Director of the Policy and Law Committee of the China Electronic Commerce Association CECA

2001年加盟易趣公司，现为亿贝易趣网络信息服务有限公司首席法律顾问兼副总裁，同时任中国电子商务协会政策法律委员会副主任委员。

The information retrieval is one of the important components of library information services. The network information retrieval not merely has a greatr impact on library information service, and has impetuses to the development of library information service.

信息检索是图书馆信息服务的重要组成部分之一，网络信息检索的出现不仅对图书馆信息服务产生较大的影响，而且对图书馆信息服务的发展具有推动作用。

This article describes the information service of agricultural university library under the network environment, and gives so me suggestions on the full utlization of network information resource and the main works, such as bettering the librarian knowledge, developing and integrating library and network resources, analysizing users' demands, inforcing training of users, sharing the inform...

提高工作人员的综合素质、开发和整合馆藏资源和网络农业资源、分析研究用户的信息需求、加强用户培训、开展馆际文献传递以实现农业信息资源共享是网络环境下农业高校图书馆信息服务的对策；为农业、农村、农民提供一站式、全方位、主动的信息服务是农业高校图书馆信息服务的发展方向。

Research on reference consultation service system based on knowledge management;2. The scries change of the domains in information service instruments,service contents and modes of acquire information and so on under the network environment made great impact on traditional work modes of library reference consultation service.

网络环境下的信息服务手段，服务内容及信息获取方式等领域的一系列变化，给图书馆参考咨询服务工作的传统工作方式带来了巨大的冲击，本文就网络环境下高校图书馆参考咨询工作面临的问题，对网络环境下高校图书馆参考咨询服务进行了一些探索。

It runs over 10 wellknown chemical websites in China.It also has a wealth of experience in the organization of largescale exhibitions and conferences at home and abroad.CNCIC will make full use of its advantages in terms of information,technologies and talents to provide the Chinese government and China's society with decisionmaking support and commonwealth services,and provide the industry and enterprises with professional valueadded information services.

CNCIC将发挥强大信息，技术和人才等资源优势，加强内部与外部资源整合，抓住信息采集，信息加工，信息服务三个环节，做大文献，咨询研究，期刊，计算机网络和政府课题五类产品，组建产业集团，面向政府，社会提供决策支持和公益服务，面向行业，企业提供专业信息的增值服务。

Chrysanthemum of 10 thousand birthday is lax to edaphic requirement, with the arenaceous qualitative loam with fecund, good drainage had better.

万寿菊对土壤要求不严，以肥沃。排水良好的砂质壤土为好。

He unstepped the mast and furled the sail and tied it.

他拔下桅杆，把帆卷起，系住。