共查询到20条相似文献，搜索用时 234 毫秒
1.
Wolfram Alpha是一个全新的、基于计算的知识搜索引擎,它将其创始人史蒂芬.沃尔弗拉姆开发的Mathematica和NKS技术应用到了互联网搜索中,为互联网用户提供了一种与传统搜索引擎截然不同的知识搜索和发现方式。凭借着独特的知识检索机制,它被《大众科学杂志》评为计算领域的2009年度最佳创新。本文介绍了Wolfram Alpha的一些基本情况,阐述了其理论背景和技术手段,并探讨了其知识检索机制和存在的一些问题。 相似文献
2.
3.
调研欧洲、北美、澳洲、亚洲、非洲发达国家具有代表性的网络资源采集项目,深入剖析其网络采集信息的服务特征（服务对象、服务方式、问题及策略等）,介绍我国网络资源采集项目采取的服务形式,提出丰富信息发现与展示服务、提供个性化服务和信息增值服务等建议,希望为我国的网络资源采集信息服务提供借鉴。 相似文献
4.
Background: A website developed by the National Heart Foundation (WA Division) and Edith Cowan University, with the help of an Australian Research Council–Linkage grant, provides insight into the sense of isolation experienced by many heart patients which prompts them to engage in a relentless search to answer the fundamental question: why me? Objective: To discover whether an online community for people with heart conditions may help instil a sense of sharing a journey with others, and to assess the impact of this shared experience. Methods: The qualitative data constituted 50 in‐depth interviews with heart patients using the HeartNET website. This website, with its 600+ membership, also provides Discussion Board data to add depth to the analysis. Results: Patients describe how their unsatisfactory search for information in one ‘place’ (the Internet) led them to discover a new ‘place’ (an online community) where they could ‘ask difficult questions’, and ‘gain support and wisdom’ from others. Conclusion: This paper suggests that, when anxious patients seek health‐related information, for example in a library, they may benefit from being given contact points to communicate with others who find themselves in similar situations. Internet‐based social software (Web 2.0) can provide this kind of communication. 相似文献
5.
Shortly after the election of the new Western Australia (WA) Government in March 2017, the new Premier, Mark McGowan, announced the first round of Machinery of Government changes to the WA public sector. The structural changes were promoted as creating collaborative departments focused on whole-of-government objectives and for delivering services in a more efficient and effective way. Part of these changes was to move the State Records Office of Western Australia under the State Library of Western Australia. The Australian Society of Archivists Western Australia Branch Committee discusses this act and the implications for the independence of the State Records Office. 相似文献
6.
Alison C. Bethel Morwenna Rogers Rebecca Abbott 《Journal of the Medical Library Association》2021,109(1):97
Background:Systematic reviews are comprehensive, robust, inclusive, transparent, and reproducible when bringing together the evidence to answer a research question. Various guidelines provide recommendations on the expertise required to conduct a systematic review, where and how to search for literature, and what should be reported in the published review. However, the finer details of the search results are not typically reported to allow the search methods or search efficiency to be evaluated.Case Presentation:This case study presents a search summary table, containing the details of which databases were searched, which supplementary search methods were used, and where the included articles were found. It was developed and published alongside a recent systematic review. This simple format can be used in future systematic reviews to improve search results reporting.Conclusions:Publishing a search summary table in all systematic reviews would add to the growing evidence base about information retrieval, which would help in determining which databases to search for which type of review (in terms of either topic or scope), what supplementary search methods are most effective, what type of literature is being included, and where it is found. It would also provide evidence for future searching and search methods research. 相似文献
7.
8.
A J Burdick 《Bulletin of the Medical Library Association》1985,73(4):383-386
The number of users on the MEDLARS system varied more during nonprime time than on prime time; there were times of higher than average use and times of much lower use. This variation in the number of users influenced search time. The study found a variation of as much as 19% from the mean search time for times of high use versus times of low use. Added-time formulas showed the additional time allowed for a search on nonprime time before costs would equal those for the same search on prime time. (For example, a search with four citations that took five minutes on prime time could take up to eight minutes and thirty seconds on nonprime time before costs would be equal.) In all examples, nonprime time searching was the most cost-effective alternative. 相似文献
9.
国外知识搜索理论研究进展综述 总被引：2，自引：0，他引：2
对知识搜索理论进行全面回顾与梳理.认为知识搜索的前因可概括为知识特性、社会资本、知识吸收能力、沟通能力和组织学习文化五个方面;知识搜索的后果主要表现为对组织创新绩效和组织学习绩效的影响.最后,对知识搜索理论的未来发展趋势进行探讨,以期为知识搜索相关问题的深入研究奠定基础. 相似文献
10.
搜索引擎的最新进展述要 总被引：1，自引：0，他引：1
搜索引擎已成为人们利用网络的最重要工具.目前,网络上出现了一些具有新颖性、创新性的搜索引擎或挖掘出搜索引擎的新功能,其中有些研究成果直接代表着搜索引擎的发展方向.文章通过跟踪、试用、分析等环节,对新的搜索引擎或具有新功能的搜索引擎进行了归纳,便于人们更好地了解当前世界搜索引擎的现状. 相似文献
11.
Leah Boulos Rachel Ogilvie Jill A. Hayden 《Journal of the Medical Library Association》2021,109(1):23
Objective:This study retroactively investigated the search used in a 2019 review by Hayden et al., one of the first systematic reviews of prognostic factors that was published in the Cochrane Library. The review was designed to address recognized weaknesses in reviews of prognosis by using multiple supplementary search methods in addition to traditional electronic database searching.Methods:The authors used four approaches to comprehensively assess aspects of systematic review literature searching for prognostic factor studies: (1) comparison of search recall of broad versus focused electronic search strategies, (2) linking of search methods of origin for eligible studies, (3) analysis of impact of supplementary search methods on meta-analysis conclusions, and (4) analysis of prognosis filter performance.Results:The review''s focused electronic search strategy resulted in a 91% reduction in recall, compared to a broader version. Had the team relied on the focused search strategy without using supplementary search methods, they would have missed 23 of 58 eligible studies that were indexed in MEDLINE; additionally, the number of included studies in 2 of the review''s primary outcome meta-analyses would have changed. Using a broader strategy without supplementary searches would still have missed 5 studies. The prognosis filter used in the review demonstrated the highest sensitivity of any of the filters tested.Conclusions:Our study results support recommendations for supplementary search methods made by prominent systematic review methodologists. Leaving out any supplemental search methods would have resulted in missed studies, and these omissions would not have been prevented by using a broader search strategy or any of the other prognosis filters tested.Open in a separate windowLeah Boulos 相似文献
12.
文章分析关联数据的应用,对比传统信息服务,归纳总结信息服务发展的新动向,即：从资源组织技术来看,出现了从文献资源整合向数据融合与跨界混搭的新发展;从检索技术来看,出现了从分面浏览、高级字段检索向基于对象和关系的语义检索的新发展;从支持第三方和嵌入式服务来看,出现了从开放接口向支持开放数据、开放服务的技术新发展。 相似文献
13.
ABSTRACT This article discusses the transition that publishers have had to make in the process of converting print journals and reference books to an online format. It was originally thought that making content available online would save publishing costs, but the changes made to production cycles and the needs of making content widely available, updated, and housed on online platforms are sometimes more expensive than the print process alone. Publishers have responded with new pricing models, and they are working more closely with libraries to deliver content to a wider audience while competing with search engines and other online content providers. Additionally, publishers have a new responsibility to manage the quality and accuracy of content given that so much information is now available to readers. 相似文献
14.
15.
徐芳 《现代图书情报技术》2009,25(5):81-85
介绍一种新的站内搜索引擎实现,它是基于Google、Baidu等大型通用搜索引擎实现站内搜索的二次开发。与其他类似应用相比其优点是：搜索结果页面干净、无其他广告、推广信息等附加内容;能同时指定多个域名,达到在主网站、子网站及类网站间同时搜索的目的。 相似文献
16.
Jennifer A. Lyon Rolando Garcia-Milian Hannah F. Norton Michele R. Tennant 《Medical reference services quarterly》2013,32(3):241-252
Expert-mediated literature searching, a keystone service in biomedical librarianship, would benefit significantly from regular methodical review. This article describes the novel use of Research Electronic Data Capture (REDCap) software to create a database of literature searches conducted at a large academic health sciences library. An archive of paper search requests was entered into REDCap, and librarians now prospectively enter records for current searches. Having search data readily available allows librarians to reuse search strategies and track their workload. In aggregate, this data can help guide practice and determine priorities by identifying users’ needs, tracking librarian effort, and focusing librarians’ continuing education. 相似文献
17.
18.
S A Hook-Shelton 《Medical reference services quarterly》1989,8(4):11-28
MEDLINE, which includes the Index to Dental Literature, has been the database of choice for most search requests generated at Indiana University School of Dentistry. However, many requests extend beyond dentistry and the health sciences into the realms of business, education, psychology, law, and computer technology. For these requests, DIALOG's new OneSearch feature can be a simple and cost-effective mechanism for supplementing searches that would otherwise be confined to MEDLINE. 相似文献
19.
搜索引擎之竞价排名研究 总被引：4，自引：0，他引：4
互联网促成了搜索引擎的广泛应用与竞价排名现象的出现。针对日趋白热化的竞价排名现象,介绍了其产生背景、在各大搜索引擎中的应用现状和影响,并提出了一些建议。 相似文献