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1.
Previous studies have repeatedly demonstrated that the relevance of a citing document is related to the number of times with which the source document is cited. Despite the ease with which electronic documents would permit the incorporation of this information into citation-based document search and retrieval systems, the possibilities of repeated citations remain untapped. Part of this under-utilization may be due to the fact that very little is known regarding the pattern of repeated citations in scholarly literature or how this pattern may vary as a function of journal, academic discipline or self-citation. The current research addresses these unanswered questions in order to facilitate the future incorporation of repeated citation information into document search and retrieval systems. Using data mining of electronic texts, the citation characteristics of nine different journals, covering the three different academic fields (economics, computing, and medicine & biology), were characterized. It was found that the frequency (f) with which a reference is cited N or more times within a document is consistent across the sampled journals and academic fields. Self-citation causes an increase in frequency, and this effect becomes more pronounced for large N. The objectivity, automatability, and insensitivity of repeated citations to journal and discipline, present powerful opportunities for improving citation-based document search. 相似文献
2.
《Information processing & management》2022,59(4):102996
Although the citation relationships among papers can help in tracking and understanding the development of knowledge, few studies have noted that the content and sentiments of citations of a paper differ. Here, we use sentiment-labeled citation data to construct a directed signed citation network, in which an author may agree with or criticize the cited paper and these represent different ways of inheriting knowledge. The dataset we use consists of 9,038 papers in the field of Computational Linguistics, including 25,275 citations, with 20.8% positive citations, 8.6% negative citations and 70.6% neutral citations. We systematically quantify the structural patterns of negative citations, impact assortativity of involved papers, occurrence time distribution and consequences of receiving negative attention. Remarkably, we find that papers with different impacts have a similar probability of receiving negative citations, and highly cited papers tend to give negative citations to low-impact papers around but avoid giving negative citations to high-impact papers. Our research also reveals the random occurrence rules and colocation patterns of negative citation distribution. In addition, we show that, in the short term, around 60% of multiple negative citations is positively related to the impact of the cited paper while more than 80% are negatively related to the impact in the long run. Our findings explain the pattern by which negative citations occur and deepen the understanding of negative citations. 相似文献
3.
《Research Policy》2022,51(4):104484
Although citations are widely used to measure the influence of scientific works, research shows that many citations serve rhetorical functions and reflect little-to-no influence on the citing authors. If highly cited papers disproportionately attract rhetorical citations then their citation counts may reflect rhetorical usefulness more than influence. Alternatively, researchers may perceive highly cited papers to be of higher quality and invest more effort into reading them, leading to disproportionately substantive citations. We test these arguments using data on 17,154 randomly sampled citations collected via surveys from 9,380 corresponding authors in 15 fields. We find that most citations (54%) had little-to-no influence on the citing authors. However, citations to the most highly cited papers were 2–3 times more likely to denote substantial influence. Experimental and correlational data show a key mechanism: displaying low citation counts lowers perceptions of a paper's quality, and papers with poor perceived quality are read more superficially. The results suggest that higher citation counts lead to more meaningful engagement from readers and, consequently, the most highly cited papers influence the research frontier much more than their raw citation counts imply. 相似文献
4.
Darshak PatelMichael R. Ward 《Research Policy》2011,40(6):886-894
We propose an empirical strategy to estimate competition in innovation markets. Our method relates firms’ market return on equity to information about patent citation patterns. Two innovations are implemented in the methodology. First is the application of daily abnormal stock returns rather than annual measures of Tobin's q. Second is the creation of citation patterns related to the area of science a firm patents in as represented by the detailed patent classification system. We find that markets positively reward firms when patents are granted. We further find that firm's market value increases when its patent portfolio is cited. We find evidence of competition in innovation markets. The market reacts at the time that the citation occurs and does not anticipate future citations at the time of patenting. Holding this effect constant, we find that citations from patents in the same area of science tend to reduce market value. We interpret these findings as consistent with more citations indicating more valuable intellectual property but citations from competing technologies decreasing it. 相似文献
5.
The rate of citation duplication was examined in three databases: MEDLINE, BIOSIS, and LIFE SCIENCES COLLECTION. Duplicate citations were found to be more pertinent than unique citations. The duplicate citations came from a highly compact literature, while those from a single database were very widely scattered. The pertinent duplicated citations were more likely to be retrieved in searches that had more terms overall, had a higher percentage of thesaurus terms, and had terms which appeared in both title and abstract. These results suggest that the rate of duplication of citations in multidatabase searches may be used to rank output according to probable pertinence. 相似文献
6.
刘会婷 《中国科技期刊研究》2015,26(12):1250-1253
[目的]对比分析中外文医学核心期刊英文题名特征,为提高中国作者撰写论文英文题名能力与提高医学核心期刊学术水平提供借鉴。[方法]分别从五种国际高影响力外文医学期刊与五种中文医学核心期刊中选取同期发表的150篇论文的英文题名进行对比分析。[结果]在题名词数、冠词与中心词的使用、题名构成形式、副标题的使用及其他书写习惯等方面,中外文期刊存在较大差异。[结论]中国作者应在语言学方面提高正确率,使题名准确、简洁又具体。同时,在规范题名写作与提高写作质量方面,国内期刊应适度学习国际知名期刊的做法,以增加被检索引用的几率。 相似文献
7.
Robert M. Losee 《Information processing & management》1996,32(6):747-767
Knowledge of window style, content, location, and grammatical structure may be used to classify documents as originating within a particular discipline or may be used to place a document on a theory vs practice spectrum. This distinction is also studied here using the type-token ratio to differentiate between sublanguages. The statistical significance of windows is computed, based on the presence of terms in titles, abstracts, citations, and section headers, as well as binary-independent and inverse-document-frequency weightings. The characteristics of windows are studied by examining their within-window density and the S concentration, the concentration of terms from various document fields (e.g. title, abstract) in the fulltext. The rate of window occurrences from the beginning to the end of document fulltext differs between academic fields. Different syntactic structures in sublanguages are examined, and their use is considered for discriminating between specific academic disciplines and, more generally, between theory vs practice or knowledge vs applications-oriented documents. 相似文献
8.
[目的/意义]探讨论文被引量与下载量之间的关系,对论文影响力评价有重要的意义。[方法/过程]通过CNKI数据库,以《中文核心期刊要目总览》中理工农医类及经济、历史、法律、哲学类期刊2006年刊载的55 000多篇论文为基础,分析不同类论文的被引量分布特征,比较同被引量论文的下载量以及相近下载量论文的平均被引量,采用Spearman相关性方法计算不同类论文下载量、被引量的等级相关系数。[结果/结论]不同类论文的被引量分布具有一致趋势:随被引量的增多论文数比例较快地减小直至为0,相应的被引量分布可以由指数衰减函数近似函数表征。在绝对数量上,论文的下载量、被引量存在较大差别,二者之间的相关性不明显,与下载、被引的自身特征以及各类论文的文献使用特征有关。Spearman等级相关分析表明,论文层级上,下载量、被引量的等级相关性较强,某一篇论文在一定时期内的下载量可以依靠其排序位数预测其统计意义上的被引排序数,可以为论文评价提供参考。 相似文献
9.
为系统了解国内机构知识库研究现状与趋势,采用文献计量法、比较分析法等,以CSSCI收录的机构知识库来源文献和被引文献数据为基础,从来源文献、引文情况及被引情况3个角度,对载文情况、引文概况、引文语种、引文类型、作者情况、期刊情况、被引情况、被引成果等多个方面进行统计、分析,并通过对这些文献的阅读、关键词分析和国内外有关研究情况的比较,针对国内机构知识库研究的问题,提出了4项建议。 相似文献
10.
This paper looks at how citations are perceived among scientists. Based on a questionnaire survey it traces the repertoire of views and experiences about citations that could be found among Norwegian scientists that had published highly cited papers. Their views circle around three issues: the relation between the quality (or importance or significance) of a paper and its citation history; the importance of visibility and how different sorts of factors play a role in determining citation in general and high citation in particular; and the fairness (or lack of fairness) of the system. Taken together, the respondents’ answers and comments offer an informal (and fragmented) sociology of citations and their role in the world of science. In the final section we discuss the relevance of our findings in respect to the increasing use of citation indicators in science policy and research evaluations. 相似文献
11.
[目的/意义]有效融合引文网络中的引用关系和文本属性等多元数据,增强文献节点间的语义关联,从而为数据挖掘和知识发现等任务提供有力的支撑。[方法/过程]提出了一种引文网络的知识表示方法,先利用神经网络模型学习引文网络中的k阶邻近结构;然后使用doc2vec模型学习标题、摘要等文本属性;最后给出了基于向量共享的交叉学习机制用于多元数据融合。[结果/结论]通过面向干细胞领域的CNKI引文数据集的测试,在链路预测上取得了较好的性能,证明了方法的有效性和科学性。 相似文献
12.
《情报科学》2006-2010年高被引论文分析 总被引：1，自引：0，他引：1
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。 相似文献
13.
Mary J. Culnan 《Information processing & management》1978,14(6):395-404
The citation practices of academics and practioners who have published papers in the proceedings of a national computer conference are analyzed in order to measure how the two groups differ in their use of published information. The comparison is based upon types of documents cited, age of cited literature and core journals cited. The study found that both groups cited the same group of core journals and cited documents of approximately the same age. Both groups cited journals most frequently and when document types are ordered according to citation frequency, the rankings are identical. However, the actual citation frequencies by type of document are not the same and these differences are attributed to unequal levels of awareness and access to specific categories of documents. 相似文献
14.
The citation practices of academics and practioners who have published papers in the proceedings of a national computer conference are analyzed in order to measure how the two groups differ in their use of published information. The comparison is based upon types of documents cited, age of cited literature and core journals cited. The study found that both groups cited the same group of core journals and cited documents of approximately the same age. Both groups cited journals most frequently and when document types are ordered according to citation frequency, the rankings are identical. However, the actual citation frequencies by type of document are not the same and these differences are attributed to unequal levels of awareness and access to specific categories of documents. 相似文献
15.
In both the UK and Australia there has been a recent move to use citation analysis in the evaluation of the research of individuals. In particular, the future UK Research Excellence Framework (REF), proposes using citation data in the research evaluation of articles published as recently as the year prior to the evaluation. In response to this move, this research develops an indicator at the level of individual articles that, when normalized, can supplement peer review. The new hybrid indicator is the weighted sum of two indicators in common usage: the article’s total number of citations in a citation window, and the Impact Factor of the journal in which the article was published. This research compares this new indicator with the article’s total number of citations in a longer citation window (the standard indicator of article impact). For citation windows of 0 or 1 years, the correlation of the simplified weighted sum with long-term citation is substantially higher than the correlation of the standard indicator of article citation with long-term citation. Moreover, for citation windows of as long as 3 years the standard indicator of citation correlates significantly with the month of publication, in that articles published earlier in the year are on average more highly cited than those published later in the year. By contrast, the skewing of the simplified weighted sum towards articles published early in the year is considerably less than that of the standard indicator. 相似文献
16.
We try to assess, in a systematic and objective manner, the research performance of 13 research institutes active in the field of molecular biology. For this purpose we have counted the number of scientific publications and the number of citations received during a five-year period (1980–1984). We use citations per publication as an indicator of quality and costs per citation as an indicator of efficiency of research. Peer review seems to discourage uninteresting, i.e. not cited, research. Grant systems seem to work more efficiently than funding on a permanent institutional basis. 相似文献
17.
基于引证网络的高被引文献实证分析——以知识服务为例 总被引：3，自引：0，他引：3
引证网络是以节点文献为中心,通过文献之间的引用关系将相关文献链接为一个网络。本文利用h-b指数选择了知识服务研究领域的30高被引文献,利用聚类方法其引证网络的6个指标数据进行分析。研究发现,这些文献的6个指标数据呈现出4种不同类型的数据分布情况,这反映出高被引文献在知识的吸收和传播中具有不同的特点。 相似文献
18.
《Research Policy》2019,48(7):1855-1865
Quantitative research evaluation requires measures that are transparent, relatively simple, and free of disciplinary and temporal bias. We document and provide a solution to a hitherto unaddressed temporal bias – citation inflation – which arises from the basic fact that scientific publication is steadily growing at roughly 4% per year. Moreover, because the total production of citations grows by a factor of 2 every 12 years, this means that the real value of a citation depends on when it was produced. Consequently, failing to convert nominal citation values into real citation values produces significant mis-measurement of scientific impact. To address this problem, we develop a citation deflator method, outline the steps to generalize and implement it using the Web of Science portal, and analyze a large set of researchers from biology and physics to demonstrate how two common evaluation metrics – total citations and h-index – can differ by a remarkable amount depending on whether the underlying citation counts are deflated or not. In particular, our results show that the scientific impact of prior generations is likely to be significantly underestimated when citations are not deflated, often by 100% or more of the nominal value. Thus, our study points to the need for a systemic overhaul of the counting methods used evaluating citation impact – especially in the case of researchers, journals, and institutions – which can span several decades and thus several doubling periods. 相似文献
19.