隐蔽网络及其资源检索策略研究

介绍了隐蔽网络的基本定义,分析了隐蔽网络出现的原因。重点讨论了如何查找隐蔽网络资源。将各种方式总体上划分为间接查找和直接查找两种类型。并介绍了自动利用专业搜索引擎发现隐形网页上资源和构建面向特定任务、人工辅助的网络爬虫两种方法。     

Exploring features for the automatic identification of user goals in web search

Queries submitted to search engines can be classified according to the user goals into three distinct categories: navigational, informational, and transactional. Such classification may be useful, for instance, as additional information for advertisement selection algorithms and for search engine ranking functions, among other possible applications. This paper presents a study about the impact of using several features extracted from the document collection and query logs on the task of automatically identifying the users’ goals behind their queries. We propose the use of new features not previously reported in literature and study their impact on the quality of the query classification task. Further, we study the impact of each feature on different web collections, showing that the choice of the best set of features may change according to the target collection.     

论网络信息安全与保密

随着网络技术的不断发展 ,网络的开放性、共享性、互连程度不断扩大 ,网络的重要性和对社会的影响越来越大 ,网络信息安全与保密问题显得越来越重要 ,本文主要介绍了网络信息安全与保密的基本知识。     

数据检索中索引技术的探讨

设计索引的目的是为了加快数据检索．文章就与索引相关的一些特征元素．提出了创建索引中数据目录项的3种不同方法．同时对B^ 索引进行了描述．分析了其在进行数据搜索的实现原理．简要个绍了在实现数据删除和插入时的优化思路．     

责任感:教师职业道德建设的基础

教师职业道德规范是师德建设的重要内容。但“应然”不是“实然”。“应然”转化为“实然”的过程,就是规范转化为师德的过程,就是“德化”的过程、“德性”形成的过程。道德规范能否内化取决于人们对规范的认同,而对规范的认同又取决于人们对自己所在群体和所从事的事业的认同。有了这种认同,他才会形成对学校和事业的责任感,而有了这种责任感他才有可能把师德规范“内化”为自己的“德性”和“德行”,从而成为一个有高尚师德的人。     

网络教育资源搜索策略研究

将网络教育手段运用于课堂教学中，是教育科研的一个新课题。用好网上教育资源的关键是根据教学科研目的，学会灵活设计检索策略获取资源，将其有机地应用于教学和科研。     

用VB实现文件查找的几种方法

现今电脑硬盘的容量越来越大,其中储存的文件也越来越多.开发能够实现文件快速查找功能的应用程序,必将具有广泛的应用前景.利用VB6.0提供的强大文件操作对象(File System Object),编制了几种切实可行的文件快速查找程序.     

Quality and relevance of domain-specific search: A case study in mental health

When searching for health information, results quality can be judged against available scientific evidence: Do search engines return advice consistent with evidence based medicine? We compared the performance of domain-specific health and depression search engines against a general-purpose engine (Google) on both relevance of results and quality of advice. Over 101 queries, to which the term ‘depression’ was added if not already present, Google returned more relevant results than those of the domain-specific engines. However, over the 50 treatment-related queries, Google returned 70 pages recommending for or against a well studied treatment, of which 19 strongly disagreed with the scientific evidence. A domain-specific index of 4 sites selected by domain experts was only wrong in 5 of 50 recommendations. Analysis suggests a tension between relevance and quality. Indexing more pages can give a greater number of relevant results, but selective inclusion can give better quality.     

Internet上的军事体育信息资源与检索

如何从Internet上获取军事体育信息资源,目前尚未见诸报导。探讨了Internet上军事体育信息资源的分布与检索问题,从军事体育官方网站、军事体育相关网站、网络数据库和搜索引擎等4个方面,阐述了Internet上军事体育信息资源的获取方法。     

基于用户信息需求的元搜索引擎的构建

针对当前网络搜索引擎未能较多地关注用户需求、查全率与查准率不高、彼此间不兼容的缺陷,提出建立基于用户需求的元搜索引擎,并分析其基本原理,给出其基本结构,讨论其运行机制和关键技术。指出基于用户需求的元搜索引擎可使网络信息资源在一定程度上结构化,实现网络信息资源的自组织,提高网络信息检索的查全率和查准率.