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   

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   

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   

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   

美国化学文摘(CA)中日本专利文献的表示方法     

丁海德  马方亮  刘波 《情报杂志》2002,21(9):47-47

介绍了CA近年来收录日本专利文献出现的一些新变化及日本专利文献在CA中的表示方法。  相似文献   

海马脑片CA1区锥体神经元的突触可塑性虚拟仿真实验教学     

查盈盈  徐爱萍  郑超  张环环  汪萌芽 《科教文汇》2021,(11):114-115

虚拟仿真技术优点卓越,具有极其广阔的应用前景,现如今其已经越来越多地应用于现代教学。该文主要以海马脑片CA1区锥体神经元的突触可塑性实验为切入点,对虚拟仿真实验教学技术在教学中的应用进行了深入研究,以期为今后虚拟仿真技术在教学领域的发展提供一定的指导和帮助。  相似文献   

企业级CA原型系统研究与实现     

杨娟 《广州广播电视大学学报》2003,3(3):44-47

本文分析CA系统以及重要的理论基础公钥机制 ,提出了在企业内部构建一个以国际标准为指导的简单而有效的企业CA认证机构。  相似文献   

Intercultural communication for health personnel     

Elizabeth Berry  Joan B. Kessler  John T. Fodor 《Int J Intercult Relat》1983,7(4):377-392

In order to develop successful health care delivery systems, both in the United States and abroad, health service workers need to understand various cultural orientations and to communicate effectively within the cultures. The authors discuss the cultural implications of health problems in three countries, the need for training health science professionals in intercultural communication, and describe an intercultural communication course designed especially for health science students at California State University, Northridge.  相似文献