《成都体育学院学报》作者引用参考文献的需求特征分析

应用文献资料统计方法,对<成都体育学院学报>2004年度作者引用参考文献的需求特征进行分析,发现作者引用文献中的一些特殊规律,找出文献收藏中图书馆应注意的一些问题,从而更好地提高馆藏质量,搞好馆藏建设.     

90年代《中国科学》生命科学学科引文分析

采用引文分析等方法 ,对《中国科学》生命科学学科 90年代论文引文进行了探讨。结果显示 ,载文量较小但文后平均引文相当高 ;引文类型中期刊占绝对优势 ( 88 51% )、书籍次之( 9 91% )、特种文献则十分稀少 ( 0 98% ) ,引文老化速度较稳定但出版时滞有增强之势 ;合作程度较高 ;引文源分析发现 ,中文引文较集中而外文引文符合布拉德福分布曲线 ,且引文偏向于微观研究。由上述分析指标可知 ,《中国科学》生命科学学科 90年代论文引文指标领先于国内科技期刊 ,接近国际同类先进期刊水平     

Rank-Stability and Rank-Similarity of Link-Based Web Ranking Algorithms in Authority-Connected Graphs

Web search algorithms that rank Web pages by examining the link structure of the Web are attractive from both theoretical and practical aspects. Todays prevailing link-based ranking algorithms rank Web pages by using the dominant eigenvector of certain matrices—like the co-citation matrix or variations thereof. Recent analyses of ranking algorithms have focused attention on the case where the corresponding matrices are irreducible, thus avoiding singularities of reducible matrices. Consequently, rank analysis has been concentrated on authority connected graphs, which are graphs whose co-citation matrix is irreducible (after deleting zero rows and columns). Such graphs conceptually correspond to thematically related collections, in which most pages pertain to a single, dominant topic of interest.A link-based search algorithm A is rank-stable if minor changes in the link structure of the input graph, which is usually a subgraph of the Web, do not affect the ranking it produces; algorithms A,B are rank-similar if they produce similar rankings. These concepts were introduced and studied recently for various existing search algorithms.This paper studies the rank-stability and rank-similarity of three link-based ranking algorithms—PageRank, HITS and SALSA—in authority connected graphs. For this class of graphs, we show that neither HITS nor PageRank is rank stable. We then show that HITS and PageRank are not rank similar on this class, nor is any of them rank similar to SALSA.This research was supported by the Fund for the Promotion of Research at the Technion, and by the Barnard Elkin Chair in Computer Science.     

一种考查高被引论文的h型指数

从h指数和整数分割思路出发,构建"线性增长"赋分模型,在此基础上提出了一种具有高被引指向性的h型指数--hl-g,并通过与hT、hm的比较,得出hl-g更加切合实际、更加完善的结论。以8种综合性农业核心期刊的hl-g比较和分析为例,阐述了hl-g在期刊评价中具有着重考查高被引区域表现和完整反映被引频次分布情况两大优势。据此推测,hl-g可作为期刊评价赋分指标,弥补现行期刊评价方法在这两方面的不足。     

《情报科学》2006-2010年高被引论文分析

以中国知网《中国学术文献网络出版总库》为统计源,从文献引证的角度分析《情报科学》高被引论文的分布规律。研究结果表明:该数据库共收录《情报科学》2006-2010年原文2039篇,被引文献1377篇,被引率为67.53%,总被引频次为7581,单篇最高被引频次81,较少的论文拥有较高的被引频次,基本符合"二八定律"。并且以被引频次≥21的前50篇论文作为研究对象,对其年代分布、被引频次、下载频次等方面进行了统计分析。     

基于h指数、h_m指数及复合影响因子的图书情报专业期刊评价分析

从国内对期刊评价的现状入手,探讨了h指数、hm指数及复合影响因子的定义。以中国知网(CNKI)引文数据库为数据源,选择北京大学《中国核心期刊要目总览》(2008版)中部分图书情报专业期刊为分析对象,分别计算各个期刊的h指数、hm指数及复合影响因子并进行排序,对结果进行比较分析,从而得出图书情报专业期刊的现状。     

我国反竞争情报研究论文的可视化分析——基于1998-2010年的引文分析

采用引文分析法从引文量、高影响力期刊、被引论文、权威机构等方面对12年来CCD收录的反竞争情报论文进行统计分析,运用多元分析法和社会网络分析法对核心作者进行共被引分析,并绘制可视化图谱,展现该领域作者间合作关系与强度,最后指出该领域取得成绩与不足,以期为国内反竞争情报研究提供参考依据。     

从高被引论文和期刊探析艺术学科学术影响力(2002-2011)

本文基于CSSCI数据库,统计分析近十年我国艺术学科高被引作者、高被引期刊频次,并用h指数评价高被引作者学术观点的影响力。统计数据客观显现我国艺术学科近十年期刊和作者高被引现状,引证分析的结果表明,高被引论文与学术影响力的正比关系。在艺术学这门学科中高被引论文表明学术期刊及论文作者的学术影响力。     

1990～2010年我国篮球运动科学研究的定量分析——基于高频引用论文的研究

以中国期刊全文数据库（CNKI）网上发布与篮球有关的科研论文为研究对象,探讨了1990年至2010年间,中国篮球科研论文的引用状况、研究领域、期刊分布和论文更新规律等方面特征。得出以下结论：自1990年以来,中国篮球科研论文数量和引文数量都经历了3个发展阶段;研究范围和研究领域逐渐扩大,但是科研内容分布具有不平衡性。     

An emerging paradigm or just another trajectory? Understanding the nature of technological changes using engineering heuristics in the telecommunications switching industry

The theoretical literature on technological changes distinguishes between paradigmatic changes and changes in trajectories. Recently several scholars have performed empirical studies on the way technological trajectories evolve in specific industries, often by predominantly looking at the artifacts. Much less - if any - empirical work has been done on paradigmatic changes, even though these have a much more profound impact on today's industry. It follows from the theory that such studies would need to focus more on the knowledge level than on the artifact level, raising questions on how to operationalize such phenomena. This study aims to fill this gap by applying network-based methodologies to knowledge networks, represented here by patents and patent citations. The rich technological history of telecommunications switches shows how engineers in the post-war period were confronted with huge challenges to meet drastically changing demands. This historical background is a starting point for an in-depth analysis of patents, in search of information about technological direction, technical bottlenecks, and engineering heuristics. We aim to identify when such changes took place over the seven different generations of technological advances this industry has seen. In this way we can easily recognize genuine paradigmatic changes compared to more regular changes in trajectory.