Burton－Kebler方程分析方法的改进

本文对Ｂｕｒｔｏｎ－Ｋｅｂｌｅｒ方程进行了线性变换，并结合实例对Ｂｕｒｔｏｎ－Ｋｅｂｌｅｒ方程进行了线性回归分析和讨论，改进了Ｂｕｒｔｏｎ和Ｋｅｂｌｅｒ提出的分析方法。     

科技文献经典老化模型的新修正

科技文献老化的经典模型,负指数模型和ＢｕｒｔｏｎＫｅｂｌｅｒ公式存在着密切联系,在分析其密切联系的基础上,提出了它们的一个新修正式,并利用统计检验的方法验证了新模型的合理性和比原模型更高的拟合度。     

评"Burton-Kebler文献老化测度方法及其测度结果的否定"

影响文献老化的因素很多。同步法和历时法分别从不同侧面反映了文献老化情况 ;两种方法在测度文献老化方面各有所长 ,各有所短。     

关于文献老化GM模型的几点注记--答胡玮同志

指出文献老化ＧＭ模型的基础在于文献老化是本征灰色系统,它适用于一般老化测度,适用于光滑离散函数,适用于历时与共时观察数据;认为最大引文年限是文献生产与交流的社会必要劳动时间的反映     

知识库管理系统：数据库观点

本文最初的目的是提出一个关于知识库管理系统（ＫＢＭＳｓ）的代表性的数据库观点。但是，不久我们发现这种观点并不存在，关于ＫＢＭＳｓ的每一种观点，无论它代表什么，都与观察者了背景和举有关，这些背景和兴趣包括数据库、概念模型、知识表示、逻辑计算，推理系统、机器学习等。因此我们决定给出关于ＫＢＭＳｓ的纯理论观点，并从我们的背景－概念模型、数据库、逻辑计算和自动推理／定理证明－出发提出一些问题和概念。     

从博克电子图书到电子图书馆

从博克电子图书到电子图书馆ＡＢＳＴＲＡＣＴＴｈｅ＂ＢＯＯＫＥｌｅｃｔｒｏｎｉｃＢｏｏｋ＂ＣｏｍｐｉｌａｔｉｏｎＥｎｖｉｒｏｎ－ｍｅｎｔ（ＷＤＢＯＯＫ）＂ｄｅｖｅｌｏｐｅｄｂｙｔｈｅｗｕｈａｎＵｎｉｖｅｒｓｉｔｙｈａｓｐｕｔｆｏｒｗａｒｄｔｈｅＥＢＭ...     

网络环境下新闻传播学文献老化规律研究北大核心CSSCI

文献老化现象是大多数学科普遍存在的一种现象,对学科的老化问题进行研究有利于了解与把握该学科的发展进度。文章选取CSSCI中的新闻传播学期刊数据为数据样本,运用引文分析方法,探讨新闻传播学的学科老化规律。在研究中通过测度与对比分析新闻传播学的半衰期、普莱斯指数、最大引文年限等重要老化指标,呈现了该学科的老化与发展状况,提出了该学科老化背后的原因以及学科发展的启示。     

科技期刊长期老化趋势与影响因素实证研究——基于4门学科期刊30年引文数据的统计分析

基于数学、计算机科学、经济学和历史学四类学科期刊样本1980-2009年间发文量与被引量的统计数据,结合SPSS统计工具软件,分析4门学科期刊30年间文献增长的数量特征及其曲线拟合结果,并结合插值被引半衰期与B-K被引半衰期剖析两种文献老化测度指标之间的数量差异,以及两者共同反映出的科学文献老化趋势延缓与学科差异化特征。最后,基于上述分析结果定量化揭示影响文献老化的学科、文献增长、文献介质类型等外部因素及内在机理,以期对当前环境下科技期刊长期老化状况做一个全面客观的认识。     

文献老化——被遗忘的智慧

文献老化理论是图书情报学研究方法的经典理论之一。采用散文的风格论述了文献的起源、文献老化的表现形式、对文献老化文献检索的分析以及对文献老化的哲理思考。     

文献老化刍议

本文联系实际综述了文献老化的概念，老化的原因、类型，以及文献老化的分析方法和量度指标，并对老化规律在实际工作中的应用作了简单论述。     

Measuring supplier performance

This paper examines the advantages and disadvantages of conducting supplier evaluations, particularly manual evaluations. It considers sample size, the impact of variables, and what to do with the results.     

信息测度方法模型分析

本文结合我国信息测度的有关案例,分析、评价了波拉特信息经济测度方法和日本信息化指数模型的优点和欠缺之处。     

Measuring risk in science

Risk plays a fundamental role in scientific discoveries, and thus it is critical that the level of risk can be systematically quantified. We propose a novel approach to measuring risk entailed in a particular mode of discovery process – knowledge recombination. The recombination of extant knowledge serves as an important route to generate new knowledge, but attempts of recombination often fail. Drawing on machine learning and natural language processing techniques, our approach converts knowledge elements in the text format into high-dimensional vector expressions and computes the probability of failing to combine a pair of knowledge elements. Testing the calculated risk indicator on survey data, we confirm that our indicator is correlated with self-assessed risk. Further, as risk and novelty have been confounded in the literature, we examine and suggest the divergence of the bibliometric novelty and risk indicators. Finally, we demonstrate that our risk indicator is negatively associated with future citation impact, suggesting that risk-taking itself may not necessarily pay off. Our approach can assist decision making of scientists and relevant parties such as policymakers, funding bodies, and R&D managers.     

Measuring Search Engine Quality

The effectiveness of twenty public search engines is evaluated using TREC-inspired methods and a set of 54 queries taken from real Web search logs. The World Wide Web is taken as the test collection and a combination of crawler and text retrieval system is evaluated. The engines are compared on a range of measures derivable from binary relevance judgments of the first seven live results returned. Statistical testing reveals a significant difference between engines and high intercorrelations between measures. Surprisingly, given the dynamic nature of the Web and the time elapsed, there is also a high correlation between results of this study and a previous study by Gordon and Pathak. For nearly all engines, there is a gradual decline in precision at increasing cutoff after some initial fluctuation. Performance of the engines as a group is found to be inferior to the group of participants in the TREC-8 Large Web task, although the best engines approach the median of those systems. Shortcomings of current Web search evaluation methodology are identified and recommendations are made for future improvements. In particular, the present study and its predecessors deal with queries which are assumed to derive from a need to find a selection of documents relevant to a topic. By contrast, real Web search reflects a range of other information need types which require different judging and different measures.     

Measuring Public Opinions About Surveys

Respondent's opinions about survey research are regarded asan expression at the individual level of the general survey-takingclimate. Based on a review of the research about ‘surveyson surveys’ five relevant dimensions of the respondent'sopinion about surveys are distinguished: survey enjoyment, surveyvalue, survey cost, survey reliability, and survey privacy.Items related to these aspects are used to develop an ‘Opinionsabout Survey Scale’. The results of an analysis of thepredictive validity of the scale support the expectations basedon the theory of planned behavior. Opinions about surveys areassociated with the intention to participate in future surveysand with hesitation to fill out the questionnaire of a mailsurvey. Opinions are not related with participation in a follow-upmail survey. The results of the wave analysis of a mail surveyare a clear indication that nonrespondents have more negativeopinions about different aspects of surveys. This also meansthat the measurement of opinions is biased. However, becauseof this bias it is worthwhile and useful to measure these opinions.     

Measuring Interactivity in Video Games

Video games are a popular form of new media, and their use is impacting multiple fields of study within the communication discipline. For instance, research programs in mass communication, health, instructional, feminist/gender, interpersonal, and intercultural communication have all examined video games. Interactivity is the hallmark of video games and consequently is a common concept in the video game literature. While video game interactivity (VGI) is still an under-specified concept, previous research suggests that interactivity has the potential to moderate both positive and negative effects of video games, and therefore it is crucial for understanding general video game effects. We developed a theoretical model of video game interactivity and tested a multidimensional scale to assess video game interactivity across five studies using six independent samples. Exploratory and confirmatory factor analyses as well as item analyses revealed a reliable and valid metric consisting of six dimensions of video game interactivity.     

Public Libraries: Measuring Their Value

Funding cuts and greater emphasis on expenditure justification in the public sector have sparked studies which attempt to demonstrate the financial return on investment of public libraries, with most of these conducted in larger urban centers. Northern Ontario, a vast region with a population less than one million, primarily Anglophone and francophone settlers and numerous Indigenous communities, served by tiny libraries, required a unique approach. A literature review and community input identified seven key sectors together with indicators for measurement. The Toolkit¹ designed by this research illustrates how to calculate an SROI that may better serve communities and improve funders’ decision-making.