ClinicalAccess: A Clinical Decision Support Tool

ClinicalAccess is a new clinical decision support tool that uses a question-and-answer format to mirror clinical decision-making strategies. The unique format of ClinicalAccess delivers concise, authoritative answers to more than 120,000 clinical questions. This column presents a review of the product, a sample search, and a comparison with other point-of-care search engines.     

搜索引擎的智能化与网络信息资源的检索研究

在网络信息资源检索的研究中，搜索引擎的研究具有非常重要的意义。本文在基于对现有搜索引擎的分析的基础上，阐述了搜索引擎的智能化发展，以及将会从根本上改变现有信息资源检索方式和信息服务模式。     

如何利用搜索引擎检索网络信息

从搜索引擎的工作机理, 评价标准, 分类, 使用方法, 使用技巧等五个方面介绍如何利用搜索引擎检索网络信息。     

油冷柴油机及其余热回收系统

本文介绍一种可以节约燃油的方法。该方法利用油冷却船用柴油机的气缸盖、气缸套及其它部件,并使气缸盖出口处冷却温度在大气压力下为100℃或更高。由于提高了冷却介质的出口温度,减少了热损失,增加余热回收,从而取得节油效果。     

Comparing rankings of search results on the Web

The Web has become an information source for professional data gathering. Because of the vast amounts of information on almost all topics, one cannot systematically go over the whole set of results, and therefore must rely on the ordering of the results by the search engine. It is well known that search engines on the Web have low overlap in terms of coverage. In this study we measure how similar are the rankings of search engines on the overlapping results.We compare rankings of results for identical queries retrieved from several search engines. The method is based only on the set of URLs that appear in the answer sets of the engines being compared. For comparing the similarity of rankings of two search engines, the Spearman correlation coefficient is computed. When comparing more than two sets Kendall’s W is used. These are well-known measures and the statistical significance of the results can be computed. The methods are demonstrated on a set of 15 queries that were submitted to four large Web search engines. The findings indicate that the large public search engines on the Web employ considerably different ranking algorithms.     

典型的图像搜索引擎特征和评价

本文首先介绍图像搜索引擎技术基础，并对图像搜索引擎进行分类；然后挑选网上较为典型的搜索引擎，分析它们的特点且给予扼要的评述。     

搜索引擎的选择与检索策略

本文根据目前国内外搜索引擎研究状况，针对搜索引擎中出现的问题，提出了搜索引擎的选择方法，及利用技巧和策略。     

利用网络日志分析提高搜索引擎的检准率

本文详细介绍了搜索引擎的发展现状和网络日志分析技术。在此基础上。探讨了如何利用网络日志分析提高搜索引擎的检准率。     

新一代中文智能搜索引擎尤里卡研究

本文介绍了Internet新一代中文智能搜索引擎尤里卡的基本情况，它能对自然语言查询进行语义理解，克服了传播搜索方法与语义无关的缺点。研究了该搜索引擎的使用方法与技巧，同时客观地评价了它的优劣得失，指出需进一步完善之处。     

搜索引擎搜索结果的评价技术

搜索引擎根据用户查询在自己的索引数据库中进行查找，并根据相关性分析将查询结果返回给用户。本文就传统信息检索系统的性能效率评价技术,针对Internet的特点，对搜索引擎搜索结果的评价进行了讨论。