Automated Classification to Improve the Efficiency of Weeding Library Collections     

Kiri L. Wagstaff  Geoffrey Z. Liu 《The Journal of Academic Librarianship》2018,44(2):238-247

Previous studies have shown that weeding a library collection benefits patrons and increases circulation rates. However, the time required to review the collection and make weeding decisions presents a formidable obstacle. This study empirically evaluated methods for automatically classifying weeding candidates. A data set containing 80,346 items from a large-scale weeding project running from 2011 to 2014 at Wesleyan University was used to train six machine learning classifiers to predict a weeding decision of either ‘Keep’ or ‘Weed’ for each candidate. The study found statistically significant agreement (p?=?0.001) between classifier predictions and librarian judgments for all classifier types. The naive Bayes and linear support vector machine classifiers had the highest recall (fraction of items weeded by librarians that were identified by the algorithm), while the k-nearest-neighbor classifier had the highest precision (fraction of recommended candidates that librarians had chosen to weed). The variables found to be most relevant were: librarian and faculty votes for retention, item age, and the presence of copies in other libraries.  相似文献   

英译汉中容易误解的句型和结构     

陈家刚 《安庆师范学院学报(社会科学版)》2003,22(6):60-61

正确的翻译建立在对原文的正确理解的基础上。但英语中的一些特殊的句型和结构常常暗含陷阱,影响了学生的理解,从而造成了翻译上的失误。本文对最常见的一些容易引起误解的句型结构从五方面进行了归纳,有利于学生对它们的把握,促进学生的翻译。  相似文献   

二级学院非英语专业学生课外学习现状的调查     

解慧琴 《和田师范专科学校学报》2007,27(5):114-115

本文以问卷和访谈的形式对600名二级学院的学生的课外学习情况从课外学习的时间、目的、内容、影响因素、策略以及存在的困难等六个方面进行调查并对结果进行分析,在此基础上提出了相应的对策。  相似文献   

一种入侵容忍的资料库   总被引：2，自引：0，他引：2  

刘海蛟  荆继武  林璟锵  杜皎 《中国科学院研究生院学报》2006,23(1):46-51

ARECA的设计保护了CA私钥的保密性，使ARECA能实时在线地为用户签发证书或撤销证书；但作为安全的在线CA，分发证书的资料库的安全也是关键问题。ARECA的资料库是入侵容忍的，通过将复制的服务器组织成分发屏蔽失效法定数目团体系统，能屏蔽良性失效或者被攻击者控制的服务器的行为，为用户提供正确的证书和证书撤销列表查询服务。异步通信条件下，n>3f个服务器组成的资料库能够容忍至多f个服务器同时失效。  相似文献   

论汤显祖“以人为本”的政治理念     

刘康宁 《丽水学院学报》2011,33(4):18-23

汤显祖是明代伟大的戏剧家,同时也是晚明民主思潮的先锋。汤显祖＂以人为本＂的政治理念的形成受主客观因素的双重影响,与当今的＂民本＂思想有着历史性的联系,而他＂以人为本＂政治理念的实践,也可视为当今民生工程的典范。  相似文献   

Finding and explaining differences: A reply to Gudykunst and Hammer     

Richard L. Wiseman  Hiroko Abe 《Int J Intercult Relat》1984,8(1):11-16

A rejoinder to Gudykunst and Hammer's critique of a recent paper is presented. We argue that their position is based on two mutually exclusive propositions and cannot therefore be credible. We continue to maintain that the evidence on intercultural effectiveness shows both culture-general and culture-specific components.  相似文献   

从“招呼语”谈英语语用能力培养     

张号召 《鸡西大学学报》2011,11(7):85-86

英语教学不仅要教给学生知识,还要培养学生运用知识的能力。但在实际运用中,经常出现语用失误。下面从常见的＂招呼语＂入手,分析语用失误原因,并提出如何培养学生语用能力的具体对策。  相似文献   

Population differences in constructive memory     

Daniel W. Kee  Susan Nakayama Siaw  Linda Carter 《Contemporary educational psychology》1985,10(3):268-274

An experiment was conducted to evaluate constructive memory in fourth-grade low-SES black and middle-SES white children. The children were read nine short passages; each passage was composed of two premise statements and a filler sentence. The children were tested by a recognition procedure. Thirty-six test sentences were presented randomly. Four sentences were associated with each passage (true premise, false premise, true inference, and false inference). Subjects were asked to make yes/no recognition decisions based on whether the test sentence was identical to a sentence presented at study. Middle-SES white children made few errors, except to true inference test sentences. This pattern of performance is consistent with the constructive view of memory. Low-SES black children also had a high error rate to true inference items. However, this outcome may not reflect constructive memory because they also had a high error rate to some of the other types of test sentences.  相似文献   

IEEE802.11MAC层CSMA/CA机制的分析与研究   总被引：1，自引：0，他引：1  

聂世群  田伟莉 《内江科技》2007,28(6):102-103

本文分别介绍了CSMA、CSMA/CD、CSMA/CA机制,着重分析了IEEE802.11MAC层CSMA/CA的实现方法和存在的一些弊端.  相似文献   

ChemVillage、 CA on CD、 Chemistry Server和Beilstein/Gmelin CrossFile的比较分析   总被引：3，自引：0，他引：3  

任平  孙维莲  杨毅 《情报科学》2003,21(5):499-505

对几个重要的化学/化工类数据库（ChemVillage,CAon CD、Chemistry Server,Beilstcin/Gmelin Cross-Fire)的内容，检索平台等做了较全面的分析和比较。  相似文献