共查询到20条相似文献，搜索用时 15 毫秒
1.
我校学报论文的引文统计分析 总被引：11，自引：1，他引：10
本文用文献计量学的方法,对《南京农业大学学报》1992-1997年发表的论文及其引文进行了统计分析。结果表明：6年共发表论文602篇,平均每期25.1篇;共有作者1767人（次）,平均每篇约2.9人;论文发表的平均时差为11个月;有594篇论文附有引文;平均引文量为7.6篇,无引率为1.3%;引文语种：中文占51.6%,英文占47.7%;引文类型：期刊占71.6%,图书和特种文献分别占23%和5.4%;中外文农业文献的半衰期分别为7.70年和14.20的;引用次数最多的中文期刊为要本校学报;中外文最大引有年限分别为3年和9年。 相似文献
2.
通过案例比较百度学术平台与来源数据库的检索结果,研究百度学术的数据整合,结果显示百度学术对中国知网、万方数据、维普期刊的2010-2016年中文期刊覆盖率大于96%,学位论文覆盖率大于90%;对比2000-2016的英文期刊数据百度学术对SCI&SSCI、EI数据库覆盖率大于94%,对Elsevier、Springer、Wiley、ACM、Emerald全文系统数据库覆盖率大于95%。但百度学术收集的专利、外文学位论文等数据不全面,对文献的分类准确性还需进一步提高。 相似文献
3.
综合指数评价法与科技文献计量指标——中国高校科技文献统计比较 总被引：2，自引：0，他引：2
科技文献计量指标从评价期刊入手,评价期刊的指标来自该刊全部论文的统计数据,因此评价期刊的质量指标值——“综合指数”,也是该刊论文的平均指标值,采用“综合指数”作为科技文献的计量指标,可以反映科技文献的质量水平。 相似文献
4.
针对图书、期刊论文等数字文献文本特征较少而导致特征向量语义表达不够准确、分类效果差的问题,本文提出一种基于特征语义扩展的数字文献分类方法。该方法首先利用TF-IDF方法获取对数字文献文本表示能力较强、具有较高TF-IDF值的核心特征词;其次分别借助知网(Hownet)语义词典以及开放知识库维基百科(Wikipedia)对核心特征词集进行语义概念的扩展,以构建维度较低、语义丰富的概念向量空间;最后采用MaxEnt、SVM等多种算法构造分类器实现对数字文献的自动分类。实验结果表明:相比传统基于特征选择的短文本分类方法,该方法能有效地实现对短文本特征的语义扩展,提高数字文献分类的分类性能。 相似文献
5.
《Information processing & management》1999,35(1):31-44
In earlier papers the authors focused on differences in the ageing of journal literature in science and the social sciences. It was shown that for several fields and topics bibliometric standard indicators based on journal articles need to be modified in order to provide valid results. In fields where monographs, books or reports are important means of scientific information, standard models of scientific communication are not reflected by journal literature alone. To identify fields where the role of non-serial literature is considerable or critical in terms of bibliometric standard methods, the totality of the bibliographic citations indexed in the 1993 annual cumulation of the SCI and SSCI databases, have been processed. The analysis is based on three indicators, the percentage of references to serials, the mean references age, and the mean reference rate. Applications of these measures at different levels of aggregation (i.e., to journals in selected science and social science fields) lead to the following conclusions. 1. The percentage of references to serials proved to be a sensitive measure to characterise typical differences in the communication behaviour between the sciences and the social sciences. 2. However, there is an overlap zone which includes fields like mathematics, technology oriented science, and some social science areas. 3. In certain social sciences part of the information seems even to be originated in non-scientific sources: references to non-serials do not always represent monographs, pre-prints or reports. Consequently, the model of information transfer from scientific literature to scientific (journal) literature assumed by standard bibliometrics requires substantial revision before valid results can be expected through its application to social science areas. 相似文献
6.
引文索引以十分接近自然语言的引用文献为检索语言,摆脱了传统检索工具必须用特定的检索语言"词典"的种种制约;引文索引自有一套特殊的结构和运作程序,它以文章的主题思想将各种相关文献组合起来,从而取得跨越学科、时间和空间以及高引得深度的检索功效.引文索引与核心期刊相结合,可以不足10%的期刊,取得相当于全部期刊的90%的信息量.这些特殊功效对于急需建立适合本国国情的信息系统的发展中国家来说,具有十分重要的现实意义. 相似文献
7.
国家自然科学基金项目产出管理学论文的计量分析 总被引：7，自引：0，他引：7
管理学论文是中文社会科学引文索引来源文献的主要构成部分，与非自然科学基金和国家社会科学基金产出管理学论文相比，国家自然科学基金产出论文在省区间的差异程度更大。本文对国家自然科学基金项目产出论文情况作了统计分析，提出实现学科交叉，缩小省区科学生产能力的若干对策建议。 相似文献
8.
运用计量分析多要素方法通过国家基金项目(国家自然科学基金项目与国家社会科学基金项目)、著作、学术论文(学位论文与期刊论文)3个方面、5种数据源对竞争情报专家进行分析,得到竞争情报研究的专家团队以及他们的影响力。 相似文献
9.
《Information processing & management》2020,57(2):102168
Citation analysis does not tell the whole story about the innovativeness of scientific papers. Works by prominent authors tend to receive disproportionately many citations, while publications by less well-known researchers covering the same topics may not attract as much attention. In this paper we address the shortcomings of traditional scientometric approaches by proposing a novel method that utilizes a classifier for predicting publication years based on latent topic distributions. We then calculate real-number innovation scores used to identify potential breakthrough papers and turnaround years. The proposed approach can complement existing citation-based measures of article importance and author contribution analysis; it opens as well novel research direction for time-based, innovation-centered research scientific output evaluation. In our experiments, we focus on two corpora of research papers published over several decades at two well-established conferences: The World Wide Web Conference (WWW) and the International ACM SIGIR Conference on Research and Development in Information Retrieval (SIGIR), containing around 3500 documents in total. We indicate significant years and demonstrate examples of highly-ranked papers, thus providing a novel insight on the evolution of the two conferences. Finally, we compare our results to citation analysis and discuss how our approach may complement traditional scientometrics. 相似文献
10.
《Information processing & management》2016,52(2):217-257
Transductive classification is a useful way to classify texts when labeled training examples are insufficient. Several algorithms to perform transductive classification considering text collections represented in a vector space model have been proposed. However, the use of these algorithms is unfeasible in practical applications due to the independence assumption among instances or terms and the drawbacks of these algorithms. Network-based algorithms come up to avoid the drawbacks of the algorithms based on vector space model and to improve transductive classification. Networks are mostly used for label propagation, in which some labeled objects propagate their labels to other objects through the network connections. Bipartite networks are useful to represent text collections as networks and perform label propagation. The generation of this type of network avoids requirements such as collections with hyperlinks or citations, computation of similarities among all texts in the collection, as well as the setup of a number of parameters. In a bipartite heterogeneous network, objects correspond to documents and terms, and the connections are given by the occurrences of terms in documents. The label propagation is performed from documents to terms and then from terms to documents iteratively. Nevertheless, instead of using terms just as means of label propagation, in this article we propose the use of the bipartite network structure to define the relevance scores of terms for classes through an optimization process and then propagate these relevance scores to define labels for unlabeled documents. The new document labels are used to redefine the relevance scores of terms which consequently redefine the labels of unlabeled documents in an iterative process. We demonstrated that the proposed approach surpasses the algorithms for transductive classification based on vector space model or networks. Moreover, we demonstrated that the proposed algorithm effectively makes use of unlabeled documents to improve classification and it is faster than other transductive algorithms. 相似文献
11.
社会标签研究现状调研与分析——基于WoS、LISA、ACMI、EEE数据库 总被引：1，自引：1，他引：0
以WoS、LISA、ACMI、EEE数据库为文献来源,运用文献计量学方法并结合文献内容,从文献量、著者、期刊和主题等方面对社会标签的研究论文进行分析,归纳出社会标签研究现状相关结论,并为社会标签的未来研究工作提出了几点建议,以期能对该主题今后的研究提供一定的参考与启示。 相似文献
12.
《Information processing & management》2023,60(1):103152
The emergence of social media has fundamentally changed the way of scholarly communication and allows for scientific research to be shared at an unprecedented speed and scale. While many studies have discussed what papers attract most online attention, how they prevail online is unclear. In this paper, we explore the diffusion patterns of ～170,000 papers with different journal tiers from 2012 to 2019 based on over 3 million Twitter mentions. We first categorize journals by the elite (the top of Q1) and non-elite (Q2～Q4) according to their journal impact factor quartiles, then use network analysis and time series analysis to characterize papers’ dynamic diffusion process, and finally discuss papers’ engaged users and disciplinary contexts. Results show that though elite journal papers spread significantly faster and more broadly than non-elite, some non-elite journal papers reached a sizable audience. For non-elite journal papers, a decent size of social media reach can be achieved through the aid of highly influential users or multiple waves of small spread that span a long period. As a result, popular non-elite journal papers tend to be more viral than the elite, focusing discussions around topics close to daily life. This study provides a new perspective to characterize the diffusion process of scientific papers and helps to further enhance the understanding of such a process. 相似文献
13.
图书情报学17种核心期刊载文被引分析 总被引：2，自引：0，他引：2
应用CNKI中《中国期刊全文数据库》和《中国引文数据库》网络版作为统计源,采用文献计量学方法,对《中文核心期刊要目总览》2004年版所确定的17种图书情报学核心期刊2006至2008年的载文被引情况进行统计,对载文量及被引篇数、被引基金论文比、被引基金论文的基金分布、期刊被引频次、单篇被引频次区间分布和高频次被引论文等指标进行了调查研究与分析解读,以了解我国图书情报领域学术成果交流、渗透和利用情况,并与前期的评价结果进行比较,客观评价本学科核心期刊的学术影响力。 相似文献
14.
Patrick Glenisson Wolfgang Glnzel Frizo Janssens Bart De Moor 《Information processing & management》2005,41(6):1548-1572
In the present study results of an earlier pilot study by Glenisson, Glänzel and Persson are extended on the basis of larger sets of papers. Full text analysis and traditional bibliometric methods are serially combined to improve the efficiency of the two individual methods. The text mining methodology already introduced in the pilot study is applied to the complete publication year 2003 of the journal Scientometrics. Altogether 85 documents that can be considered research articles or notes have been selected for this exercise. The outcomes confirm the main results of the pilot study, namely, that such hybrid methodology can be applied to both research evaluation and information retrieval. Nevertheless, Scientometrics documents published in 2003 cover a much broader and more heterogeneous spectrum of bibliometrics and related research than those analysed in the pilot study. A modified subject classification based on the scheme used in an earlier study by Schoepflin and Glänzel has been applied for validation purposes. 相似文献
15.
2002～2006年中山大学医科以第一作者单位发表的SCI收录论文共有821篇,论文发表在286种期刊上,载文量最高的期刊为（CHINESE MEDICAL JOURNAL）有115篇,论文的影响因子主要分布在0～2．999。通过对2002—2006年中山大学医科的科技论文被SCI收录情况进行统计分析,分析存在的问题并提出建议。 相似文献
16.
期刊论文的被引量不但会因为学科、地区有所差异,还会因文献的类型不同而造成引用行为的较大差异,而学术论文(Articles)和研究综述(Review)以及其它文献类型的学术价值是不同的。因此对期刊进行以引文为基础的评价时,需要对期刊所刊载的文献类型按照内容做出分类。本文对期刊评价中将所有文献类型视为等同的影响因子进行改进。依据序关系转换权重的原理和算法,结合专家建议得出各文献类型的相对序关系,并进一步转换为相应的权重值,最终形成基于期刊文献类型的序关系转换权重的影响因子。 相似文献
17.
中文期刊全文数据库是中文期刊文献保障的主要资源,但现有的中文期刊全文库存在多库并存、重复收录、查全困难,期刊种数覆盖不全,入库期刊缺年、缺期,来源期刊不稳定等问题。解决现有问题,除需数据库商提高数据库收录质量外,突破版权制约,建立国家级的、有法律保障的、收录期刊文献齐全的"中文期刊文献保障体系",是期刊工作者应关注的重要问题。 相似文献
18.
[目的/意义]研究学术文献被撤销的规律和特征对于客观认识撤稿现象、净化学术环境、加强科研诚信建设具有重要价值。当前对于撤稿的研究集中于期刊论文,很少关注会议文献。[方法/过程]以撤稿观察数据库中7579篇被撤销会议文献为研究对象,分析总结被撤销文献的时间、来源和学科分布特征以及被撤销原因和时滞。[结果/结论]会议文献撤稿与期刊论文撤稿在原因和时滞上存在重要差异,中国是会议文献撤稿的“重灾区”。研究认为,科研人员、审稿人、出版商、科研管理机构亟需共同努力,加强对于学术会议的质量控制,提高相关主体行为的规范性。 相似文献
19.
This paper aims to verify the trends in the scientific research about Radio Frequency Identification (RFID) published in journal papers from 2006 to 2016. RFID is a well-known information technology, which is used in different sectors to track and identify goods and to control and preserve the quality of products and their data. Because many researchers have studied RFID, practitioners are investing their time in developing low-cost and longer-life RFID systems using artificial intelligence, decision-aid tools, and the inclusion of a variety of sensors, questions emerge about its publications. Some different multidisciplinary database (Scopus and Web of Science), mainly based on peer-reviewed journals, were accessed. Therefore, to examine these papers, a sequence of statistical analyses was also studied. We found 17,190 papers, most of which were concentrated in SciVerse Scopus, and the increase paper tax (RGR(i)) decreased between 2006 and 2015, and started increasing between 2015 and 2016. Even though some journals are very famous for publishing information technology subjects, a journal on mechanical and materials concentrated most papers. 相似文献
20.
《Agricultural Sciences in China》近五年载文统计分析 总被引：1，自引：0，他引：1
采用文献计量学方法,对2006-2010年《Agricultural Sciences in China》刊载的论文数量、作者合作、地区分布、基金论文及引文、普赖斯指数进行了统计分析,旨在为评估该期刊提供参考数据。 相似文献