共查询到19条相似文献，搜索用时 428 毫秒
1.
[目的/意义]查询式搜索适用于目标明确的提问应答式信息问题，探索式搜索更注重搜索过程的人机交互性、动态性与多面性，两者表现出不同的行为特征。作为搜索行为研究的基本问题之一，相关研究还比较缺乏。论文旨在探究查询式搜索与探索式搜索行为特征的差异，这对于信息搜索系统的功能优化以及指导用户高效获取信息都具有重要的实践意义。[方法/过程]论文以健康信息搜索为例，采用搜索行为实验的方法，通过对录屏数据的分析，从检索策略、学习行为、深度搜索和搜索绩效4个维度对两种搜索行为进行比较。[结果/结论]查询式搜索与探索式搜索在关键词变换数、访问网页数目等6个指标上存在显著性差异，在检索工具选择、查询串长度、搜索结果集的翻页和相关链接搜索4个指标上不存在显著性差异。 相似文献
2.
【目的/意义】网络的发展使学术信息的获取行为发生了改变,学术信息搜索是典型的探索式搜索,运用信息 觅食理论分析学术信息探索式搜索行为已成为搜索行为特征研究的新角度。【方法/过程】从信息觅食视角构建了 学术数据库搜索行为模型,通过设计特定主题的学术搜索任务开展实验,录屏记录用户的信息斑块选择、菜单选 择、信息线索识别等行为数据,通过统计分析揭示学术信息探索式搜索行为的特征。【结果/结论】中文学术数据库 是学术信息搜索的首选信息斑块,相关文献变少导致数据库斑块切换。主题、篇名和关键词是常见的搜索途径,三 者之间的转移也最常见。用户根据标题、摘要和全文判断搜索结果的相关性。序化信息、视觉信息和文献引用是 能够有效识别的信息线索。搜索结果受多方面因素的影响。 相似文献
3.
[目的/意义]从建构主义视角出发,综述国外“搜索即学习”领域中“将信息搜索视为学习过程”的研究成果,为今后探索用户网络信息搜索中的知识变化主题提供理论基础和方法论支持。[方法/过程]围绕用户网络信息搜索中用户领域知识结构的变化、用户系统知识结构的变化、用户知识变化的搜索实验任务设计、面向用户学习的信息检索系统优化设计4个分主题进行分析和总结。[结果/结论]第一,意义建构理论和建构主义学习理论可以有效地揭示用户信息搜索过程中的学习机制。第二,用户网络信息搜索中的学习同时包括领域知识学习和系统知识学习两部分,但是已有的研究却缺乏对这两个组成部分交互机制的探索。第三,已有的研究设计了面向用户学习的检索算法,并优化或开发了相应的搜索系统。 相似文献
4.
5.
解决用户的模糊查询问题一直以来是信息检索领域研究的热点。为了解决不同用户间的查询差异，一种称为个性化搜索的技术得以提出，其通过获取用户的喜好来识别查询意图，但研究发现很少有用户愿意直接或间接提供个人信息。本文提出一种基于用户点击历史信息自动获取用户兴趣进而对搜索结果进行个性化呈现的Web搜索系统架构。基于主题相关PageRank技术，设计了用户兴趣学习算法和个性化搜索页面排序算法。实验表明该算法能有效学习用户的兴趣信息，提高了个性化Web搜索质量。 相似文献
6.
[目的/意义]随性休闲搜索具有与工作任务情境下以结果为导向的搜索行为不同的规律，探索休闲情境中的搜索行为特征对于信息系统功能的优化，从而为用户日常信息搜索提供更有效的支持具有重要的意义。[方法/过程]论文以采莓模型为基础，采用基于观察实验的日记研究法，招募23位实验参与者进行了为期一周的视频搜索实验，通过文本分析和数据建模，从查询变化、思考、信息/文档、结束4个方面分析了随性休闲搜索行为的特征。[结果/结论]随性休闲搜索中用户需求及其变化带来了查询改变；用户对信息保持着开放选择，从自身情感体验进行搜索评价。随性休闲搜索是一个顺其自然的信息接受和利用过程，也是一项带来快乐体验的休闲活动。 相似文献
7.
针对如何从丰富的网络信息资源中进行准确、快速检索有用信息的问题。介绍了基于词条空间矢量搜索的基本理论,设计了基于词条空间矢量搜索的Web信息检索系统模型,并采用Java语言完成了基于词条空间矢量的Web信息混合搜索引擎的设计,应用实验证明,该方法比单一搜索引擎具有更深入、更细致的站内全文搜索能力,比关键词标引具有更准确的文档内容表达能力,在基于内容的查询和信息过滤等方面有很好的应用前景,为实现网上信息检索的个性化服务、主动信息服务,为进一步提高Web信息查询的查全率和查准率提供了一种新的思路和方法。 相似文献
8.
本文为提高数据仓库前端工具的智能化程度和查询分析能力,提出了一种基于知识的面向主题智能分析系统框架,结合数据仓库、人工智能、数据挖掘、云模型等相关技术,为用户提供一种基于领域知识的业务概念术语级的智能查询和智能应答机制,增强了数据仓库查询的智能化程度,使用户能够基于领域知识进行动态即席查询,并且为用户的查询提供更多的相关信息知识。 相似文献
9.
网上期刊建设初探 总被引：2，自引：2，他引：2
丁蓉 《中国科技期刊研究》2002,13(5):419-421
探索如何建设网上期刊，分析了网站的设计、资料的积累、动态信息的发布、网上搜索查询系统的建立、数据库的创建、ASP程序的调用等方面所作的工作。 相似文献
10.
基于注意力理论视角,将外部知识搜索过程分解为外部知识搜索选择和搜索强度两个部分,探索外部知识搜索选择(本地知识搜索和国际知识搜索)对创新绩效的影响,以及搜索强度(搜索努力程度和搜索持续性)的调节效应。研究显示,本地知识搜索和国际知识搜索对创新绩效具有正向影响,而国际知识搜索对创新绩效具有更强的影响效应;此外,企业外部知识搜索选择必须与搜索强度相匹配。相比本地知识搜索,企业在国际市场上需要实施更努力和持续的搜索方式。 相似文献
11.
12.
Topic Maps及其应用实例分析 总被引：1，自引：0，他引：1
Topic maps是描述知识结构,建立知识结构同相关信息资源关联的ISO国际标准,可以提供最佳的信息导航。分析Topic maps概念和基本构成的基础上,以大学信息门户Topic map的创建为例,从本体构建、Topic map定义、TAO的编码以及可视化等角度探讨了Topic maps的应用和实现技术。 相似文献
13.
The evaluation of exploratory search relies on the ongoing paradigm shift from focusing on the search algorithm to focusing on the interactive process. This paper proposes a model-driven formative evaluation approach, in which the goal is not the evaluation of a specific system, per se, but the exploration of new design possibilities. This paper gives an example of this approach where a model of sensemaking was used to inform the evaluation of a basic exploratory search system(s) in the context of a sensemaking task. The model suggested that, rather than just looking at simple search performance measures, we should examine closely the interwoven, interactive processes of both representation construction and information seeking. Participants were asked to make sense of an unfamiliar topic using an augmented query-based search system. The processes of representation construction and information seeking were captured and analyzed using data from experiment notes, interviews, and a system log. The data analysis revealed users’ sources of ideas for structuring representations and a tightly coupled relationship between search and representation construction in their exploratory searches. For example, users strategically used search to find useful structure ideas instead of just accumulating information facts. Implications for improving current search systems and designing new systems are discussed. 相似文献
14.
This study investigated whether and how different factors in relation to task, user-perceived knowledge, search process, and system affect users’ search tactic selection. Thirty-one participants, representing the general public with their own tasks, were recruited for this study. Multiple methods were employed to collect data, including pre-questionnaire, verbal protocols, log analysis, diaries, and post-questionnaires. Statistical analysis revealed that seven factors were significantly associated with tactic selection. These factors consist of work task types, search task types, familiarity with topic, search skills, search session length, search phases, and system types. Moreover, the study also discovered, qualitatively, in what ways these factors influence the selection of search tactics. Based on the findings, the authors discuss practical implications for system design to support users’ application of multiple search tactics for each factor. 相似文献
15.
首先介绍主题图的概念及数据模型,并与传统知识组织方法进行了比较分析,然后探讨了主题图应用于数字图书馆知识组织中的可行性,提出了一种新的基于主题图的数字图书馆知识组织模型,最后通过实例分析对模型进行了验证,为我国数字图书馆知识组织建设的具体运用提供有力的支持。Abstract： This paper firstly introduces the concept and data model of topic maps,and makes a comparative analysis of the traditional knowledge organization methods. The paper then discusses the feasibility of the application of topic maps in knowledge organization in digital libraries,and proposes a new model of knowledge organization in digital libraries based on topic maps. Finally,the paper validates the model with case analysis,which provides strong support for the specific implementation of knowledge organization in digital libraries in China. 相似文献
16.
17.
Ian Ruthven Mark BaillieLeif Azzopardi Ralf BierigEmma Nicol Simon SweeneyMurat Yaciki 《Information processing & management》2008
In this paper we investigate how information surrogates might be useful in exploratory search and what information it is useful for a surrogate to contain. By comparing assessments based on artificially created information surrogates, we investigate the effect of the source of information, the quality of an information source and the date of information upon the assessment process. We also investigate how varying levels of topical knowledge, assessor confidence and prior expectation affect the assessment of information surrogates. We show that both types of contextual information affect how the information surrogates are judged and what actions are performed as a result of the surrogates. 相似文献
18.
Facet-based opinion retrieval from blogs 总被引：1，自引：0，他引：1
The paper presents methods of retrieving blog posts containing opinions about an entity expressed in the query. The methods use a lexicon of subjective words and phrases compiled from manually and automatically developed resources. One of the methods uses the Kullback–Leibler divergence to weight subjective words occurring near query terms in documents, another uses proximity between the occurrences of query terms and subjective words in documents, and the third combines both factors. Methods of structuring queries into facets, facet expansion using Wikipedia, and a facet-based retrieval are also investigated in this work. The methods were evaluated using the TREC 2007 and 2008 Blog track topics, and proved to be highly effective. 相似文献
19.
《Information processing & management》2002,38(1):37-54
When accessing an information retrieval system, it has long been said that undergraduates who are in an exploratory stage of researching their essay topic should use a high recall search strategy; what prevents them from doing so is the information overload factor associated with showing the undergraduate a long list of citations. One method of overcoming information overload is summarizing and visualizing the citation list. This paper examines five summarization and visualization schemes for presenting information retrieval (IR) citation output, then discusses whether these schemes are appropriate for undergraduates and other domain novice users. We ask and answer four questions: (1) What is the message these schemes try to communicate and (2) is this message appropriate for domain novice users like undergraduates? (3) How do these schemes communicate their message and (4) is how they communicate the message appropriate for a domain novice? We conclude that (i) the most appropriate message for information space visualizations for domain novice users is associative thinking, and (ii) the message should be communicated with a standardized look that remains relatively constant over time so that the shape and form of the visualization can become familiar and thus useful to students as they navigate their way through the information space produced by a high recall search strategy. 相似文献