Using lexical chains for keyword extraction   总被引：9，自引：0，他引：9  

Gonenc Ercan  Ilyas Cicekli   《Information processing & management》2007,43(6):1705

Keywords can be considered as condensed versions of documents and short forms of their summaries. In this paper, the problem of automatic extraction of keywords from documents is treated as a supervised learning task. A lexical chain holds a set of semantically related words of a text and it can be said that a lexical chain represents the semantic content of a portion of the text. Although lexical chains have been extensively used in text summarization, their usage for keyword extraction problem has not been fully investigated. In this paper, a keyword extraction technique that uses lexical chains is described, and encouraging results are obtained.  相似文献   

情报学领域人工智能相关研究的文献计量分析及探析     

王林旭  严承希 《图书情报知识》2020,(1):53-62,83

[目的/意义]作为一门与信息技术密切关联的学科,近年来快速发展的人工智能为情报学带来了诸多影响。有效梳理和整合这些影响的发展脉络与应用场景,强化人工智能在当前情报工作中的角色与作用,能为情报学相关研究的发展提供一定的参考与启示。[研究设计/方法]聚焦情报学领域人工智能相关研究,从高被引论文、文献共引、主题词共现三个维度对人工智能在情报学中的知识基础及其演化和研究热点予以分析与解读。[结论/发现]归纳了人工智能研究对情报学的影响,主要包括促进情报学研究主题的衍生和情报学研究方法的革新两方面,并从理论创新、研究对象拓展、信息服务提升与学科建设四个方面探讨人工智能在情报学领域可能的应用。[创新/价值]通过对情报学领域人工智能相关研究进行深入量化分析和定性研究,探讨和揭示了该主题下研究热点、研究趋势和相关发展规律,为相关领域学者提供一定借鉴与启发。  相似文献   

基于机器学习的图书馆用户流失影响因素研讨     

刘桂琴  许新华 《新世纪图书馆》2020,(1):9-13

论文针对图书馆用户流失问题,基于图书馆用户数据,构建用户特征矩阵,利用深度神经网络预测用户流失风险;将存在流失风险的用户作为重点研究对象,根据用户特征,结合S-O-R理论设计图书馆用户流失影响因素模型。采用扎根理论方法设计问卷,提取影响图书馆用户流失的指标因素,并构建结构方程模型进行分析,将技术研究与质性研究相结合,挖掘影响用户流失的核心因素,并在此基础上,构建了图书馆智慧型服务空间设计模型,为图书馆创新服务提供决策支持。  相似文献   

Application of machine learning techniques to assess the trends and alignment of the funded research output     

《Journal of Informetrics》2020,14(2):101018

Research and development activities are regarded as one of the most influencing factors of the future of a country. Large investments in research can yield a tremendous outcome in terms of a country’s overall wealth and strength. However, public financial resources of countries are often limited which calls for a wise and targeted investment. Scientific publications are considered as one of the main outputs of research investment. Although the general trend of scientific publications is increasing, a detailed analysis is required to monitor the research trends and assess whether they are in line with the top research priorities of the country. Such focused monitoring can shed light on scientific activities evolution as well as the formation of new research areas, thus helping governments to adjust priorities, if required. But monitoring the output of the funded research manually is not only very expensive and difficult, it is also subjective. Using structural topic models, in this paper we evaluated the trends in academic research performed by federally funded Canadian researchers during the time-frame of 2000–2018, covering more than 140,000 research publications. The proposed approach makes it possible to objectively and systematically monitor research projects, or any other set of documents related to research activities such as funding proposals, at large-scale. Our results confirm the accordance between the performed federally funded research projects and the top research priorities of Canada.  相似文献   

虚拟技术在计算机实验教学中的应用   总被引：1，自引：0，他引：1  

田玉静  邵景玲  王玮 《温州职业技术学院学报》2011,11(4):61-65

针对当前计算机实验资源缺乏和计算机更新快的问题,提出以虚拟技术构建虚拟机试验平台的解决办法。实践证明,虚拟技术可为实验教学和科研构建一个集约高效的计算机实验平台,以VMware公司的VMware Workstation软件创建的虚拟机是对现有计算机实验资源的有力补充,且可随时更新,符合低碳环保的要求。利用虚拟机可方便开展许多传统实验环境下难以开展的计算机实验教学。  相似文献   

基于虚拟机的Windows Server 2003 OSPF路由实现教学设计     

唐灯平 《四川职业技术学院学报》2011,21(3):123-125

OSPF路由协议是计算机网络技术专业重要的知识点之一,对Windows Server 2003下OSPF路由协议的实现进行了研究,提出了运用虚拟机提供的虚拟平台进行Windows Server 2003下OSPF路由实现教学设计,设计了网络拓扑结构,构建了虚拟网络平台,配置了Windows Server 2003下OSPF路由协议,最终对实训的结果进行了验证.  相似文献   

论浙江省普通话水平测试“机助人测”的利与弊     

张蒲荣 《宁波教育学院学报》2011,13(4):31-34

浙江省普通话水平测试"机助人测"系统,经过几年的运行,发现其有利于节约测试时间,有利于测试员灵活掌握测试节奏,有利于学生测试状态的正常发挥和应试心理的调适;但也存在着测试过程中学生的应试节奏把握不太好,测试员的测试状态和测试水准难以均衡,测试题目和测试系统不够完善等弊端。  相似文献   

CAS中PCMCIA技术及在物联网中的应用研究     

杜恒  王超 《襄樊职业技术学院学报》2011,10(2):29-32

有线电视网络采用机卡分离方式实现了基于PCMCIA（Personal Computer Memory Card International Association）技术的条件接收系统。目前基于PCMCIA技术来实现机卡分离的方案可行性最强。本文进行了基于PCMCIA技术公共接口CI（Common Interface）的软件、硬件设计,实现了基于PCMCIA技术的条件接收系统,同时考虑PCMCIA技术在物联网中的运用。  相似文献   

基于情境感知的高校移动图书馆知识资源推荐研究          下载免费PDF全文

张潇璐  赵学敏  刘璇 《情报科学》2020,38(1):48-52

【目的/意义】基于情境感知的个性化推荐技术引起了广泛关注,成为新的研究热点,本文针对高校移动图 书馆提出一种基于情境感知的知识资源推荐模型。【方法/过程】融入情境因素,通过基于改进受限玻尔兹曼机的协 同过滤算法来实现读者所处移动情境下的知识资源推荐。并通过真实数据集进行实验验证。【结果/结论】提出的 基于情境感知的知识资源推荐模型和算法,具有较高的准确度和效率,能够有效解决移动环境下高校读者个性化 知识资源推荐问题。  相似文献   

A rule induction framework for the determination of representative learning design in skilled performance     

Sam Robertson  Bart Spencer  Nicole Back  Damian Farrow 《Journal of sports sciences》2019,37(11):1280-1285

Representative learning design provides a framework for the extent to which practice simulates key elements of a performance setting. Improving both the measurement and analysis of representative learning design would allow for the refinement of sports training environments that seek to replicate competition conditions and provide additional context to the evaluation of athlete performance. Using rule induction, this study aimed to develop working models for the determination of high frequency, representative events in Australian Rules football kicking. A sample of 9005 kicks from the 2015 Australian Football League season were categorised and analysed according to the following constraints: type of pressure, kick distance, possession source, time in possession, velocity and kick target. The Apriori algorithm was used to develop two models. The first consisted of 10 rules containing the most commonly occurring constraint sets occurring during the kick in AF, with support values ranging from 0.15 to 0.22. None of the rules contained more than three constraints and confidence values ranged from 0.63 to 0.84. The second model considered ineffective and effective kick outcomes and displayed 70% classification accuracy. This research provides a measurement approach to determine the degree of representativeness of sports practice and is directly applicable to various team sports.  相似文献