信息检索决策中的学习规则量化分析——强化模型拟合实验观测     

白晨  甘利人 《情报学报》2011,30(1)

使用学习模型定量分析信息用户检索行为特征,对于扩展传统用户研究的方法、促进学科间融合具有重要意义。本文首先分析了信息用户检索决策中的强化学习特征,并选择了强化学习模型中的Bush-Mosteller模型和Borgers-Sarin模型对用户的检索决策行为形成过程进行模拟。模拟结果表明Borgers-Sarin模型成功捕捉了用户检索行为的形成过程,说明用户学习规则特征表现为将预期与反馈结果进行比较;模型的参数表明用户行为的黏滞性、惯性特征明显。  相似文献   

美国两大法律数据库检索技术与功能比较分析     

范静怡 《图书馆学研究》2011,(14):59-65

Lexis.com和Westlaw International是美国两个著名的法律数据库,其文献收录覆盖范围广、文献类型多样、检索技术复杂,从内容到功能上十分类似。对两者收录内容、检索方式、检索技术、检索功能等进行比较和分析,可使用户对其结构和检索技巧有更深刻的了解,方便学习者和研究者有效利用这两大法律数据库。  相似文献   

开放式创新过程中技术搜索策略和方法研究     

李文元  梅强  顾桂芳 《情报理论与实践》2011,34(5)

本文将开放式创新过程划分为技术获取和技术利用两个阶段,提出了贯穿于两个阶段的4种技术搜索策略,分析了解决创造性问题理论在两个阶段的应用原理与步骤,探讨了吸收能力和环境包容性对技术搜索的作用。在此基础上,本文提出开放式创新过程中技术搜索策略和方法的分析框架。  相似文献   

搜索引擎及其特色功能的比较与应用分析     

何素清  刘树春 《现代情报》2011,31(6):127-129

全文搜索引擎是目前比较有效的网络信息搜索工具。本文比较了谷歌、百度、必应、雅虎、搜狗、有道和搜搜等常用的7种搜索引擎的学术信息搜索情况、特色功能和搜索语法。在介绍功能特色的基础上,分析了这些功能在学术信息检索中的应用特点。  相似文献   

电力电缆故障测寻定位方法的探     

《中国科技纵横》2011,(15):114-116

根据高低压电缆检修、运行中处理故障的经验,介绍了目前国内外电缆故障测寻定位的原理、方法、应用及改进意见。  相似文献   

工作搜寻偏好、心理资本与工作搜寻绩效的关系研究——基于地方应用型本科高校2013届毕业生的调查     

王勇 《扬州大学学报(高教研究版)》2014,(2):34-40

工作搜寻偏好是指工作搜寻者在面对几个或者多个工作搜寻方式或工作搜寻结果时,选择其中某一个方式或结果的倾向性。以江苏地方应用型本科高校2013届毕业生为对象,探讨工作搜寻偏好对工作搜寻绩效的影响,并分析心理资本在工作搜寻偏好和工作搜寻绩效间的调节作用。结果表明工作搜寻偏好对工作搜寻绩效存在不同程度的影响,心理资本在工作搜寻偏好和工作搜寻绩效间起着部分调节作用。  相似文献   

Overlaps of multiple database retrieval and citation tracking in dementia care research: a methodological study     

Julian Hirt  Johannes Bergmann  Melanie Karrer 《Journal of the Medical Library Association》2021,109(2):275

Objective:We aimed to determine overlaps and optimal combination of multiple database retrieval and citation tracking for evidence synthesis, based on a previously conducted scoping review on facilitators and barriers to implementing nurse-led interventions in dementia care.Methods:In our 2019 scoping review, we performed a comprehensive literature search in eight databases (CENTRAL, CINAHL, Embase, Emcare, MEDLINE, Ovid Nursing Database, PsycINFO, and Web of Science Core Collection) and used citation tracking. We retrospectively analyzed the coverage and overlap of 10,527 retrieved studies published between 2015 and 2019. To analyze database overlap, we used cross tables and multiple correspondence analysis (MCA).Results:Of the retrieved studies, 6,944 were duplicates and 3,583 were unique references. Using our search strategies, considerable overlaps can be found in some databases, such as between MEDLINE and Web of Science Core Collection or between CINAHL, Emcare, and PsycINFO. Searching MEDLINE, CINAHL, and Web of Science Core Collection and using citation tracking were necessary to retrieve all included studies of our scoping review.Conclusions:Our results can contribute to enhancing future search practice related to database selection in dementia care research. However, due to limited generalizability, researchers and librarians should carefully choose databases based on the research question. More research on optimal database retrieval in dementia care research is required for the development of methodological standards.  相似文献   

Who is blocking access to PubMed? Educational ‘Escape Room’ for medical residents     

Noelia lvarez‐Díaz  Eullia Grifol‐Clar 《Health information and libraries journal》2021,38(1):72-76

Teaching students how to conduct bibliographic searches in health sciences’ databases is essential training. One of the challenges librarians face is how to motivate students during classroom learning. In this article, two hospital libraries, in Spain, used Escape rooms as a method of bringing creativity, teamwork, communication and critical thinking into bibliographic search instruction. Escape rooms are a series of puzzles that must be solved to exit the game. This article explores the methods used for integrating escape rooms into training programmes and evaluates the results. Escape Rooms are a useful tool that can be integrated into residents’ training to support their instruction on bibliographic searches. This kind of learning stablishes competences like logical thinking and deductive approaching. These aspects aid participants to make their own decision and to develop social and intellectual skills.  相似文献   

帮助读者用分类号检索网上书目   总被引：1，自引：0，他引：1  

秦淑贞 《现代图书情报技术》2003,(Z1)

根据网上图书馆书目检索中 ,分类号检索途径不易被读者利用的状况 ,提出了帮助读者利用分类号检索的措施 ,并对《中图法》第四版电子版提出了改进意见  相似文献   

基于语义匹配的采购联盟伙伴搜索方法     

何小琴 《现代情报》2012,32(8):45-48

采购联盟合作伙伴的选择是采购联盟成功的一个关键,而伙伴搜索是伙伴选择重要的第一步。本文将电子商务中采购联盟伙伴搜索问题转换为采购需求文本的语义匹配问题,介绍了一种基于领域本体和语义相似度的采购联盟伙伴搜索模型。该模型通过对采购需求文本概念向量的上位填充和语义相似度计算来量化采购需求的语义匹配程度。  相似文献