“阿尔茨海默病”在《中图法》中的类目设置探讨     

刘丽娟 《中华医学图书馆杂志》2008,17(2):47-49

近年来,有关阿尔茨海默病的文献大量涌现,但《中图法》第4版中并无相关类目。通过对《中图法》R749．16老年及早老性精神障碍和中国精神疾病分类的分析,参照国际疾病分类（ICD-10）和《美国精神疾病诊断与统计手册》第4版修订本（DSM-IV-R）和《中国精神障碍分类与诊断标准》第3版（CCMD-3）相关类目的现行标准和原则,提出3种分类方案。  相似文献   

Power Struggles,Regulation and Responsibility     

Sian Barber 《Media History》2018,24(1):99-114

This article explores the relationship between the British Board of Film Classification (BBFC) and government during the implementation of the Video Recordings Act (VRA). It considers the public Parliamentary debates about the VRA, and places them alongside private correspondence between the Home Office and the BBFC, and internal BBFC material from the recently catalogued James Ferman papers held at the BFI. As well as exploring the introduction of the VRA, this article also aims to briefly consider its implications for the BBFC, how they set about interpreting and implementing its stringent recommendations and how this impacted upon the organisational working practices of the Board. While the VRA was without doubt one of the most significant pieces of legislation within the history of film regulation in Britain, the time is ripe for its reappraisal and with it a re-evaluation of the role played by the BBFC in securing statutory regulatory powers.  相似文献   

Granularity of algorithmically constructed publication-level classifications of research publications: Identification of topics     

Peter Sjögårde  Per Ahlgren 《Journal of Informetrics》2018,12(1):133-152

The purpose of this study is to find a theoretically grounded, practically applicable and useful granularity level of an algorithmically constructed publication-level classification of research publications (ACPLC). The level addressed is the level of research topics. The methodology we propose uses synthesis papers and their reference articles to construct a baseline classification. A dataset of about 31 million publications, and their mutual citations relations, is used to obtain several ACPLCs of different granularity. Each ACPLC is compared to the baseline classification and the best performing ACPLC is identified. The results of two case studies show that the topics of the cases are closely associated with different classes of the identified ACPLC, and that these classes tend to treat only one topic. Further, the class size variation is moderate, and only a small proportion of the publications belong to very small classes. For these reasons, we conclude that the proposed methodology is suitable to determine the topic granularity level of an ACPLC and that the ACPLC identified by this methodology is useful for bibliometric analyses.  相似文献   

英语里的同形异义和同形异义单词     

夏颖 《和田师范专科学校学报》2007,27(4):102-103

同形异义和同形异义单词是英语词汇学的一个重要组成部分。本文从同形异义和同形异义词的概念、同形异义词的分类以及构成同形异义词的三种方式这三个方面,对英语里的同形异义和同形异义单词作了初步的探讨。  相似文献   

<中图法>4版个人著作集归类问题   总被引：1，自引：0，他引：1  

潘杏仙  张洁 《安徽师范大学学报(人文社会科学版)》2001,29(3):464-467

通过一系列的实例分析，指出《中国图书馆分类法》4版个人著作集归类中存在的一些问题，并提出：“党的领导人”类目范围应扩大到对党的建立和发展起过重大作用的领导人；关于历史人物政治理论方面的个人著作集应归属于当时的政治制度史；对于跨学科、综合性的个人著作集，社会科学内容的入C类，自然科学内容的入N类，只有横跨C、N两大类内容的才入Z类等。  相似文献   

集合对等问题中的反射     

岑燕斌  姚惠  罗会亮 《黔南民族师范学院学报》2004,24(3):5-8

集合对等问题不仅是集合论中的基本问题，也是实变函数论教学中的一个难点，其关键是如何在两集合之间建立一个“双射”。本文将从其具体问题出发，提供解决这类问题的一些基本思想、方法。  相似文献   

试论战国时期齐国的文字货币     

李俊宪 《山东教育学院学报》2007,22(1):42-44

齐国作为战国时期的政治经济文化大国之一,凭借优越的地理位置环境,不仅创造了较为发达的商业经济,而且创造了发达的文化,在货币的铸造方法和文字上可窥豹一斑。本文重点介绍齐国的刀币和圆钱,并对其类型和发展沿革进行粗浅的探究,以期在货币文字文化方面对齐国文化做一些挖掘。  相似文献   

Separating the Odds: Thresholds for Entropy in Logistic Regression     

Brandi A. Weiss  William Dardick 《Journal of Experimental Education》2020,88(4):676-697

Abstract

Researchers are often reluctant to rely on classification rates because a model with favorable classification rates but poor separation may not replicate well. In comparison, entropy captures information about borderline cases unlikely to generalize to the population. In logistic regression, the correctness of predicted group membership is known, however, this information has not yet been utilized in entropy calculations. The purpose of this study was to, 1) introduce three new variants of entropy as approximate-model-fit measures, 2) establish rule-of-thumb thresholds to determine whether a theoretical model fits the data, and 3) investigate empirical Type I error and statistical power associated with those thresholds. Results are presented from two Monte Carlo simulations. Simulation results indicated that EFR-rescaled was the most representative of overall model effect size, whereas EFR provided the most intuitive interpretation for all group size ratios. Empirically-derived thresholds are provided.  相似文献   

《中图法》第四版I212/217分类问题探讨   总被引：2，自引：0，他引：2  

刘少武  杨秀丽 《图书馆论坛》2003,23(6):148-150

文章就I2 12 / 2 17类目复分时 ,上位时代号码的使用问题 ;跨中国现、当代两个时期个人文学作品集的时代断限问题 :“I2 12 / 2 17”与“I2 12”的类目区别等《中图法》第四版分类标引中被人们广为关注的热点和难点问题进行了分析探讨 ,并提出了自己的见解 ,旨在抛砖引玉 ,以期引起有关专家、同行的进一步关注 ,并希冀通过更为深入的争论和探讨 ,使I2 12 / 2 17的归类最终取得共识。  相似文献   

专题数据库建设中的分类与主题标引   总被引：3，自引：0，他引：3  

陆音 《图书馆建设》2001,(6):50-51

本文主要对专题数据库建库过程中遇到的分类和主题标引等实际问题进行研究和探讨，并找出解决问题的办法。  相似文献