�����鱨�����еļ������⼰�Ľ�����

??By analyxang the problems existing in the online information retrieval in China, some measures are put for- ward to irrxprove online retrieval strategy, establish appropriate retrieval rttode, enhance the quality of machine search personnel and make necessary training for users.     

SooPAT搜索引擎与中国知识产权网专利检索比较研究

文章从国内外专利检索角度出发,对SooPAT搜索引擎和中国知识产权网的数据覆盖范围、检索界面、检索分析功能以及检索结果等方面进行了详细地对比分析,为图书馆员和读者获取专利信息提供指导和帮助.     

基于本体的国史知识检索平台构建研究

[目的/意义]构建国史知识检索平台,提高用户获取国史知识的效率,促进国史宣传和教育。[方法/过程]提出基于本体的国史知识检索平台构建思路与总体框架,在构建国史本体知识库的基础上,采用Neo4j数据库作为RDF数据仓储,创建基于Solr的实例索引、三元组索引和词条索引,针对多种检索需求设计实现检索引擎的执行流程、检索式构造方法以及查询处理算法,并为国史知识展示设计可视化实现方式。[结果/结论]构建国史知识检索平台,提供实体检索、查询问答、关联检索、时序检索及语义资源浏览等检索与浏览服务。该平台框架及关键技术实现方案可为面向领域知识的深度检索服务提供重要参考。     

综述全文检索系统

本文根据近年国内所发表的有关文章和部分国外文献，对全文检索系统涵义、全文数据库的研制、全文本的前处理技术以及文本检索技术作了综述。以期进一步推进我国计算机情报检索事业的发展。     

泛在知识环境对信息检索课的影响

文章指出目前信息检索课在取得令人瞩目的成就的同时,面临进一步发展的困难,而泛在知识环境的实现,将给该课程带来机遇和挑战。泛在知识环境下信息检索课可以尝试采取以移动教学为主、课堂教学为辅的教学方式,其教学内容在继承目前部分教学内容的基础上,增加移动搜索、知识社区和个人数字图书馆等内容。     

两大中国专利检索系统的比较分析

主要介绍了“国家知识产权局专利检索系统”和“中国专利信息中心专利检索系统”，从收录内容和检索方式上对这两个专利检索系统作详细的分析、比较和评价，以便于用户选择使用。     

我国图书馆书目数据库的数据特征分析与检索方式扩展研究

从分析当前书目数据库的特征入手，依次对题名、主题、分类号等项目的数据质量和标引特征进行分析，得出在现有的书目数据质量情况下，几乎没有一条提高查全率和查准率的综合性检索途径的结论。针对现状，指出提高书目数据库检索效果和检索精度的必要性，并对如何提高检索质量的问题进行研究，研究内容包括检索语言兼容性和检索方法的扩展性，并为提高书目数据检索的综合质量、增加书目检索系统的开放性探索提供方案。     

Search engines’ responses to several search feature selections

The authors of this paper investigated the impact of the advanced search features of three common search engines on retrieval result performance: Yahoo, Google, and Live Search. The authors analyzed 240 search queries with different information need emphases to determine retrieval effectiveness differences among regular search, title search, exact phrase search, and PDF file format restriction search. A one-way ANOVA method and regression analysis method were used for the study. It was found that the PDF file format restriction search achieved the best retrieval performance among Yahoo, Google and Live Search. The regular search achieved the best web page ranking performance among Yahoo, Google, and Live Search. The findings of this study can be used to assist users in formulating an appropriate search strategy to improve search effectiveness, and to shed light on how search engines react to different types of search features in terms of retrieval effectiveness.     

Search engines’ responses to several search feature selections

The authors of this paper investigated the impact of the advanced search features of three common search engines on retrieval result performance: Yahoo, Google, and Live Search. The authors analyzed 240 search queries with different information need emphases to determine retrieval effectiveness differences among regular search, title search, exact phrase search, and PDF file format restriction search. A one-way ANOVA method and regression analysis method were used for the study. It was found that the PDF file format restriction search achieved the best retrieval performance among Yahoo, Google and Live Search. The regular search achieved the best web page ranking performance among Yahoo, Google, and Live Search. The findings of this study can be used to assist users in formulating an appropriate search strategy to improve search effectiveness, and to shed light on how search engines react to different types of search features in terms of retrieval effectiveness.     

博客搜索引擎与传统搜索引擎的比较研究

简要介绍了博客与国内外著名博客搜索引擎,针对博客搜索引擎与传统搜索引擎的不同,从工作原理、检索内容与检索方式三个方面对两种搜索引擎进行了系统的分析与比较,并选取了四个不同方面的具有代表性的主题,对两种搜索引擎的代表进行了检索功能和检索性能方面的测评,最后指出了两种搜索引擎在资源价值、检索方式、个性化服务等方面的各自的优势与不足之处,以期对两种搜索引擎的改进提供借鉴。