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1.
传统基于C/S模式的Web搜索方法对网络带宽和网络通畅性的要求都比较高,因此在当今互联网的海量数据中的检索效率比较低。在分析移动Agent技术特点的基础上,提出一种基于移动Agent的分布式Web搜索模型。该模型根据中文信息搜索的特殊性,将移动Agent技术与分类算法相结合,在搜索过程中引入了用户输入信息的预处理过程来进行信息分类,然后根据分类结果形成基于用户兴趣度的移动Agent搜索路径选择策略以及并发方法,由此来提高Web搜索的效率。详细介绍框架的组成和所采用的关键技术,并通过一个移动Agent的开发平台——Aglet平台对模型进行实现和实验。实验结果表明,采用该模型进行Web检索,比传统的C/S检索方式减少50%以上的搜索时间,而在各资源服务器存储的文件资源类别和资源数量差异较大情况下的搜索效率比非并发的其他移动Agent搜索模型搜索时间要减少70%以上。  相似文献   

2.
基于移动Agent和Web服务的分布式地理信息查找研究   总被引:3,自引:0,他引:3  
提出并实现了一种基于移动Agent和Web服务进行分布式地理信息查找的系统框架。根据系统的查找策略移动Agent可以对分布于网络中的地理信息进行自主搜索,利用移动Agent和Web服务之间的交互可以允许多种类型的应用程序透明访问查找服务。  相似文献   

3.
对Deep Web中的海量信息进行集成是Web信息检索领域的一个新兴研究热点.本文提出了一个基于移动Agent的Deep Web数据集成框架,设计了数据集成中间件DWDIM(Deep Web Data Integration Middleware),采用Java语言和Aglet平台对集成系统进行实现.并将控制学中的负反馈技术引入到系统设计当中,提高了集成系统的性能.  相似文献   

4.
随着互联网技术的快速发展,智能移动的应用越来越广泛.信息资源获取的方式方法遇到了相应的新问题,为了解决遇到的问题,提出了基于HTML5的Web前端框架设计.采用基于HTML5技术的移动Web前端设计与开发策略,对Web前端框架设计进行设计和建设.基于HTML5的Web前端框架设计,使信息的获取得到了有效地提升.  相似文献   

5.
杨丹  申德荣  陈默 《计算机科学》2015,42(7):240-244
基于Web查询的地理位置、时间查询意图和用户偏好的个性化Web搜索可以改善Web搜索结果,更好地满足不同用户的信息需求。提出了GT-WSearch个性化Web搜索框架,它通过挖掘搜索结果、用户点击数据和对查询进行分析得到的用户概貌和查询概貌,来捕捉用户的地理-时间的意图和偏好,提高搜索质量。用户概貌表明了查询自身的地理-时间的特性。 GT-WSearch框架在排序函数中利用文档的地理位置、时间的相关度来进行个性化搜索。 最后将使用线性的相关度排序函数进行重新排序的搜索结果返回给用户。大量实验结果表明,所提出的个性化方法在提高Web搜索结果的质量中取得了明显的效果。  相似文献   

6.
为满足用户精确化和个性化获取信息的需要,通过分析Deep Web信息的特点,提出了一个可搜索不同主题Deep Web 信息的爬虫框架.针对爬虫框架中Deep Web数据库发现和Deep Web爬虫爬行策略两个难题,分别提出了使用通用搜索引擎以加快发现不同主题的Deep Web数据库和采用常用字最大限度下载Deep Web信息的技术.实验结果表明了该框架采用的技术是可行的.  相似文献   

7.
在分析当前一些主流的wrapper技术的基础上,提出了一个基于移动Agent的Web信息抽取系统框架。在该框架中,利用移动Agent所具有的自治性、移动性、交互性和智能性,将数据抽取和转换任务交给移动Agent,让其移动到Web数据源上去完成信息抽取任务,并将抽取结果传回。这样不但可以减少数据传输量,节约网络带宽,降低响应时间;还可以减少对网络的依赖性,允许网络的间断连接。  相似文献   

8.
Web数据管理是研究如何根据动态的用户需求从动态的数据源中获取和管理Web数据.本文综述了近10年来该领域的相关文献,针对Web数据管理所必需的数据获取、数据管理和数据服务三大功能,对元搜索技术、数据空间以及跨媒体技术的研究现状和研究成果进行了总结和分析.最后,讨论Web数据管理系统中存在的问题,从数据质量、系统一致性维护以及个性化服务三个方面对未来研究进行了展望.  相似文献   

9.
针对传统的基于关键词的搜索与数据检索存在的弊端,本文提出基于本体的Web信息抽取框架。该框架首先获取Web页面,将其转换为格式良好的HTML文档,然后利用HTML解析器将该文档转化为DOM树,再根据XPath表达式获取用户感兴趣的数据块,由此生成抽取规则,最后通过OntPMatch算法实现数据的抽取,并以RDF数据格式储存信息。本文以棉花信息为研究对象加以实证研究,实现Web生物信息数据抽取原型系统,为方便用户发现有价值的Web生物信息资源提供一个有效的工具。  相似文献   

10.
针对传统数据网格信息服务的不足之处,在分析Web搜索引擎技术和基于关键词的数据库索引技术基础之上,结合这两种信息获取技术,设计了数据网格中结构化数据资源发现技术的体系结构.在科学数据网格信息服务系统中,利用开源Lucene全文检索软件包,实现了结构化数据资源发现的关键技术.  相似文献   

11.
基于P2P的Web搜索技术   总被引:4,自引:0,他引:4  
方启明  杨广文  武永卫  郑纬民 《软件学报》2008,19(10):2706-2719
Web搜索引擎已经成为人们从海量Web信息中快速找到所需信息的重要工具,随着Web数据量的爆炸性增长,传统的集中式搜索引擎已经越来越不能满足人们不断增长的信息获取需求.随着对等网络(peer-to-peer,简称P2P)技术的快速发展,人们提出了基于P2P的Web搜索技术并迅速成为研究热点.研究的目的是对现有的基于P2P的Web搜索技术进行总结,以期为进一步研究指明方向.首先分析了基于P2P的Web搜索面临的诸多挑战;然后重点总结分析了基于P2P的Web搜索的各项关键技术的研究现状,包括系统拓扑结构、数据存放策略、查询路由机制、索引切分策略、数据集选择、相关性排序、网页收集方法等;最后对已有的3个较有特色的基于P2P的Web搜索原型系统进行了介绍.  相似文献   

12.
13.
Using keywords as inputs to search engines and receiving documents as responses remains the prevalent way to access information on the Web. Although a shift toward entity awareness is a fairly recent trend in information access, such methods remain devoid of semantics, which are increasingly recognized as the lynchpin of search, integration, and analysis. We argue that relationships are at the heart of semantics, and, as such, we envision a Web of relationships to relate content across Web resources. Under this powerful new paradigm, information access over the Web would switch from a mere document-retrieval operation to an information framework that supports insight elicitation and semantic analytics over Web resources. In this column, we outline our vision and discuss how recent Improvements in content extraction and semantic annotation will ultimately help us realize this relationship Web.  相似文献   

14.
Providing an effective mobile search service is a difficult task given the unique characteristics of the mobile space. Small-screen devices with limited input and interaction capabilities do not make ideal search devices. In addition, mobile content, by its concise nature, offers limited indexing opportunities, which makes it difficult to build high-quality mobile search engines and indexes. In this paper we consider the issue of limited page content by evaluating a heuristic content enrichment framework that uses standard Web resources as a source of additional indexing knowledge. We present an evaluation using a mobile news service that demonstrates significant improvements in search performance compared to a benchmark mobile search engine.  相似文献   

15.
The rapid growth of the Internet has created a tremendous number of multilingual resources. However, language boundaries prevent information sharing and discovery across countries. Proper names play an important role in search queries and knowledge discovery. When foreign names are involved, proper names are often translated phonetically which is referred to as transliteration. In this research we propose a generic transliteration framework, which incorporates an enhanced Hidden Markov Model (HMM) and a Web mining model. We improved the traditional statistical-based transliteration in three areas: (1) incorporated a simple phonetic transliteration knowledge base; (2) incorporated a bigram and a trigram HMM; (3) incorporated a Web mining model that uses word frequency of occurrence information from the Web. We evaluated the framework on an English–Arabic back transliteration. Experiments showed that when using HMM alone, a combination of the bigram and trigram HMM approach performed the best for English–Arabic transliteration. While the bigram model alone achieved fairly good performance, the trigram model alone did not. The Web mining approach boosted the performance by 79.05%. Overall, our framework achieved a precision of 0.72 when the eight best transliterations were considered. Our results show promise for using transliteration techniques to improve multilingual Web retrieval.  相似文献   

16.
张祥  葛唯益  瞿裕忠 《软件学报》2009,20(10):2834-3843
随着语义网中RDF数据的大量涌现,语义搜索引擎为用户搜索RDF数据带来了便利.但是,如何自动地发现包含语义网信息资源的站点,并高效地在语义网站点中收集语义网信息资源,一直是语义搜索引擎所面临的问题.首先介绍了语义网站点的链接模型.该模型刻画了语义网站点、语义网信息资源、RDF模型和语义网实体之间的关系.基于该模型讨论了语义网实体的归属问题,并进一步定义了语义网站点的发现规则;另外,从站点链接模型出发,定义了语义网站点依赖图,并给出了对语义网站点进行排序的算法.将相关算法在一个真实的语义搜索引擎中进行了初步测试.实验结果表明,所提出的方法可以有效地发现语义网站点并对站点进行排序.  相似文献   

17.
赵媛  蒲兴彦 《微机发展》2007,17(9):185-187
为了实现数据信息在Internet上的广域共享和快捷获取,产生了一种信息网格的软件框架,而企业信息网格技术正是目前企业信息共享进程中一项比较热门的技术。介绍了网格、信息网格技术的概念,并进一步阐述了企业信息网格的基本框架及其实现流程,然后以具体的项目《企业信息网格关键技术研究》为例,提出了服务点播技术以及它的开发实现,并且在与Web Service客户端技术的比较中,明确了服务点播技术的优点。  相似文献   

18.
Nowadays the classic web paradigms are being subjected to changes; every day millions of users around the world use their Smartphones to access web applications from anywhere. The World Wide Web it is one of the biggest repositories of information in the world, and that information is stored in internet servers and repositories, but today in the real world there are many other information sources such as electronic devices with communication capabilities: smart appliances and sensor networks. The Smartphones are equipped with communication hardware elements like the Bluetooth module, which allows the Smartphone to exchange information with nearby electronic devices. Every day more and more mobile applications are being developed for native platforms that use Bluetooth’s communication module to send and receive information from different sources. Native mobile applications use the specific platform’s APIs to manage the Bluetooth communication actions (send and receive information, search for devices, etc.), however, web applications do not have technical capabilities to manage the Smartphone’s Bluetooth communication module and thereof cannot use that kind of information. The main objective of this research work is to design a novel framework that allows classic web applications to use information from nearby electronic devices. The proposed framework must be easy to use and able to be integrated with common web technologies. Developers can use this framework to include new information sources and data exchange procedures in an easy way. The new type of information can be merged with the web to develop or improve algorithms and web applications.  相似文献   

19.
随着互联网上多媒体资源的急剧增加以及移动设备功能的不断完善,如何在海量多媒体资源中快速检索出所需要的资料显得至关重要。传统的基于关键词描述的多媒体检索技术因其描述能力有限等原因已不能满足用户对于多媒体语义内容的检索要求,而且这些技术直接应用到性能相当有限的移动设备上也是不可行的。移动设备用户对精确而快速地检索多媒体资源的需求越来越强烈。本文详细介绍了在移动设备上进行基于内容的多媒体检索技术的研究成果。相比现有技术,这些研究成果无论准确度还是速度都有很大提升。  相似文献   

20.
Mobile Cloud Computing (MCC) is arising as a prominent research area that is seeking to bring the massive advantages of the cloud to the constrained smartphones. Mobile devices are looking towards cloud-aware techniques, driven by their growing interest to provide ubiquitous PC-like functionality to mobile users. These functionalities mainly target at increasing storage and computational capabilities. Smartphones may integrate those functionalities from different cloud levels, in a service oriented manner within the mobile applications, so that a mobile task can be delegated by direct invocation of a service. However, developing these kind of mobile cloud applications requires to integrate and consider multiple aspects of the clouds, such as resource-intensive processing, programmatically provisioning of resources (Web APIs) and cloud intercommunication. To overcome these issues, we have developed a Mobile Cloud Middleware (MCM) framework, which addresses the issues of interoperability across multiple clouds, asynchronous delegation of mobile tasks and dynamic allocation of cloud infrastructure. MCM also fosters the integration and orchestration of mobile tasks delegated with minimal data transfer. A prototype of MCM is developed and several applications are demonstrated in different domains. To verify the scalability of MCM, load tests are also performed on the hybrid cloud resources. The detailed performance analysis of the middleware framework shows that MCM improves the quality of service for mobiles and helps in maintaining soft-real time responses for mobile cloud applications.  相似文献   

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