On knowledge-poor methods for person name matching and lemmatization for highly inflectional languages   总被引：1，自引：1，他引：0  

Jakub Piskorski  Karol Wieloch  Marcin Sydow 《Information Retrieval》2009,12(3):275-299

Web person search is one of the most common activities of Internet users. Recently, a vast amount of work on applying various NLP techniques for person name disambiguation in large web document collections has been reported, where the main focus was on English and few other major languages. This article reports on knowledge-poor methods for tackling person name matching and lemmatization in Polish, a highly inflectional language with complex person name declension paradigm. These methods apply mainly well-established string distance metrics, some new variants thereof, automatically acquired simple suffix-based lemmatization patterns and some combinations of the aforementioned techniques. Furthermore, we also carried out some initial experiments on deploying techniques that utilize the context, in which person names appear. Results of numerous experiments are presented. The evaluation carried out on a data set extracted from a corpus of on-line news articles revealed that achieving lemmatization accuracy figures greater than 90% seems to be difficult, whereas combining string distance metrics with suffix-based patterns results in 97.6–99% accuracy for the name matching task. Interestingly, no significant additional gain could be achieved through integrating some basic techniques, which try to exploit the local context the names appear in. Although our explorations were focused on Polish, we believe that the work presented in this article constitutes practical guidelines for tackling the same problem for other highly inflectional languages with similar phenomena.

Marcin SydowEmail:

  相似文献   

郑樵目录学思想体系及其广义性论 ——解读《通志·校雠略》   总被引：1，自引：0，他引：1  

张新民 《图书情报工作》2009,53(21):142-145

郑樵目录学思想由求书、校书及分编三个前后相衔接的阶段组成,形成一个完整的开放性体系;这三个阶段又分别与辑佚学、校勘学和目录学紧密相关,其求书理论成为辑佚学的理论依据,校书思想进一步规范传统校雠学的范畴,分类编目则是目录学的理论基础,充分体现郑氏目录学思想的广义性特征。  相似文献   

“五计学”在我国的发展演进分析     

赵蓉英  魏明坤 《现代情报》2017,37(6):155

[目的/意义]随着科学技术的高速发展、知识交叉越来越多、科学与社会的关系越来越复杂,如何利用计量学的原理、方法与工具处理这些错综复杂的关系显得尤为重要,可见进一步厘清我国计量学发展轨迹具有重要意义。[方法/过程]本文基于CNKI、CSSCI数据库,利用可视化软件,对国内已有的文献进行分析,探析国内计量学发展的研究演进过程,通过文献的梳理分析,使用文献的共引分析、共词分析方法对我国计量学发展轨迹及研究趋势进行可视化分析。[结果/结论]本文通过文献共被引分析,发现我国计量学研究的两个核心领域;通过作者共被引分析,发现研究主题演进过程中代表人物及其更替;通过关键词共现分析,掌握目前国内"五计学"研究热点的演进。  相似文献   

论巴渝格律诗人邹绛     

刘静 《涪陵师范学院学报》2009,25(2)

邹绛是活跃于巴渝诗坛上的格律诗人,长期潜心于现代格律诗创作和理论研究,在体式建设、节奏建设和继承、借鉴与创新等方面丰富和发展了现代格律诗.其诗富于自然舒畅的节奏感,在自由的口语中体现严谨的格律,严谨的格律中透出自如活泼的气息.  相似文献   

融合数据增广技术与机器学习算法的个人信用评分研究     

陆健健  江开忠 《教育技术导刊》2009,19(8):40-43

为了提高个人信用评分模型算法预测精准率,受视觉领域数据增广思路启发,提出融合数据增广技术与机器学习算法的个人信用评分模型。该模型首先对原始个人信用数据进行数据增广处理,然后基于机器学习分类算法训练一个二分类个人信用评分模型,最后基于公开个人信用数据集,分别建立未经过数据增广和经过数据增广处理后的个人信用评分模型。对比准确率、精确率、召回率、F1 得分、AUC 值和 ROC 曲线等 6 个性能评价指标,结果显示,相较于仅基于机器学习算法的个人信用评分模型,融合了数据增广技术与机器学习算法的个人信用评分模型使得分类性能得到了一定提升,分类准确率平均高出 5%。  相似文献   

Academic Digital Libraries of the Future: An Environment Scan     

Derek Law 《New Review of Academic Librarianship》2013,19(1):53-67

Libraries are attempting to face a future in which almost every fixed point has disappeared. Users are changing; content is changing; research is taking new forms. Indeed the very need for libraries is being questioned in some quarters. This paper explores the nature of the changes and challenges facing higher education libraries and suggests key areas of strength and core activities which should be exploited to secure their future.  相似文献   

Impact maturity times and citation time windows: The 2-year maximum journal impact factor     

P. Dorta-González  M.I. Dorta-González 《Journal of Informetrics》2013,7(3):593-602

Journal metrics are employed for the assessment of scientific scholar journals from a general bibliometric perspective. In this context, the Thomson Reuters journal impact factors (JIFs) are the citation-based indicators most used. The 2-year journal impact factor (2-JIF) counts citations to one and two year old articles, while the 5-year journal impact factor (5-JIF) counts citations from one to five year old articles. Nevertheless, these indicators are not comparable among fields of science for two reasons: (i) each field has a different impact maturity time, and (ii) because of systematic differences in publication and citation behavior across disciplines. In fact, the 5-JIF firstly appeared in the Journal Citation Reports (JCR) in 2007 with the purpose of making more comparable impacts in fields in which impact matures slowly. However, there is not an optimal fixed impact maturity time valid for all the fields. In some of them two years provides a good performance whereas in others three or more years are necessary. Therefore, there is a problem when comparing a journal from a field in which impact matures slowly with a journal from a field in which impact matures rapidly. In this work, we propose the 2-year maximum journal impact factor (2M-JIF), a new impact indicator that considers the 2-year rolling citation time window of maximum impact instead of the previous 2-year time window. Finally, an empirical application comparing 2-JIF, 5-JIF, and 2M-JIF shows that the maximum rolling target window reduces the between-group variance with respect to the within-group variance in a random sample of about six hundred journals from eight different fields.  相似文献   

Taxonomy of e-readiness assessment measures   总被引：1，自引：0，他引：1  

Payam Hanafizadeh  Mohammad Reza Hanafizadeh  Mohsen Khodabakhshi 《International Journal of Information Management》2009

To benefit from the advantages of information society, on the one hand, and to be afraid of being left further behind by Global Society and the increase in the digital divide, on the other hand, stimulate countries to be part of Global Information Society. These issues have led policymakers to move towards such a society by identifying the objectives, goals and targets. Planning to achieve these objectives needs a real understanding of the current situation, which is obtained by e-readiness assessment measures. There has been a proliferation of e-readiness assessment measures in recent years that each one has a certain objective. This paper elaborates on and categorizes these measures that help scholars and policymakers to (1) select the measures that fit in with their objectives, (2) prevent the repetitive research, (3) identify the defects and flaws of previous measures and correct them in their own measures, and (4) use the experiences of previous measures to construct their own ones. Based on definitions, objectives, dimensions, methods and approaches, in this paper, the measures are categorized and finally, a measure for e-readiness assessment is presented. Since this measure is a convergence of e-readiness assessment measures, the experienced modelers have consensus on it and it is more suitable to measure e-readiness of countries. Also, it can be exploited as the basis and standard for internationally comparable information society statistics.  相似文献   

本体评估指标体系的构建研究   总被引：1，自引：0，他引：1  

贾君枝  刘艳玲 《图书情报工作》2009,53(12):100-103

为有效地实现本体构建的动态评估,论文基于本体建设的生命周期阶段,提出涵盖本体的原模型阶段、模型阶段、应用阶段三个阶段的评估指标体系。评估内容涉及对本体概念层、结构层、语境层、应用层的全方位评估,其目的在于保证本体的构建质量,实现对本体的有效管理与维护,从而为本体构建者提供参考依据,为本体使用者提供选择依据。
  相似文献   

80年代以来我国书目情报理论研究之进展   总被引：25，自引：0，他引：25  

王友富 《图书情报工作》2000,44(12):16-22

从书目情报基本理论、书目情报系统理论、书目情报服务、书目控制4个方面综述80年代以来书目情报理论研究之进展,并就研究中出现的问题与不足提出了看法。  相似文献