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The single publication H-index of papers in the Hirsch-core of a researcher and the indirect H-index
L. Egghe 《Scientometrics》2011,89(3):727-739
The single publication H-index of Schubert is applied to the papers in the Hirsch-core of a researcher, journal or topic. Four practical examples are given and regularities are explained: the regression line of the single publication H-index of the ranked papers in the Hirsch-core is decreasing. We propose two measures of indirect citation impact: the average of the single publication H-indices of the papers in the Hirsch-core and the H-index of these single publication H-indices, defined as the indirect H-index. Formulae for these indirect citation impact measures are given in the Lotkaian context. 相似文献
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Quality data in manufacture process has the features of mixed type, uneven distribution, dimension curse and data coupling. To apply the massive manufacturing quality data effectively to the quality analysis of the manufacture enterprise, the data pre-processing algorithm based on equivalence relation is employed to select the characteristic of hybrid data and preprocess data. KML-SVM (Optimised kernel-based hybrid manifold learning and support vector machines algorithm) is proposed. KML is adopted to solve the problems of manufacturing process quality data dimension curse. SVM is adopted to classify and predict low-dimensional embedded data, as well as to optimise support vector machine kernel function so that the classification accuracy can be maximised. The actual manufacturing process data of AVIC Shenyang Liming Aero-Engine Group Corporation Ltd is demonstrated to simulate and verify the proposed algorithm. 相似文献
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Scientometrics - Text representation is the preliminary work for in-depth analysis and mining of information in scientific papers. It directly affects the effects of downstream tasks such as,... 相似文献
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Citation classics identify those highly cited papers which are an important reference point in a research field. To identify a paper as a citation classic we have to fix a citation threshold value. Usually, this threshold value should not be the same for all research fields because each field presents its respective citation pattern. Studies of citation classics in the literature define particular criteria and methods to set citation thresholds, which are often set arbitrarily and designed ad-hoc, and do not allow the scientific community to validate and compare their results. In this paper we introduce the concept of H-Classics to overcome this problem and provide scientific community a standardization of key constructs. We present a new and systematic method to identify citation classics. This identification method of highly cited papers is based on the H-index and thank to the properties of H-index it is sensitive to the own characteristics of any research discipline and also its evolution. Therefore, the concept of H-Classics allows to systematize search procedure of citation classics for any field of research. 相似文献
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根据Welch—Satterthwaite公式,推证出一种新的自由度评定公式,可供评定测量不确定度时采用, 试公式与目前在认证实验室中所用的经验公式不同. 相似文献
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分析了影响室内空气品质的室内因素及室外因素,指出了传统空调在改善室内空气品质方面存在的问题,最后提出了改善室内空气品质的措施。 相似文献
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Evidence is examined for the repeated claim that published papers with more than one author are, on average, of higher quality than those with a single author. Among published studies it is shown that no clear conclusion can be drawn, though evidence supporting the claim is stronger in astronomy and physics than among the social sciences. An empirical study of 656 papers in four Australian science journals produced negative results. Possible reasons for the differing results, and difficulties in researching the field, are highlighted. 相似文献
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Except the alphabetic ordering authorship papers, the citations of multi-authored papers are allocated to the authors based on their contributions to the paper. For papers without clarification of contribution proportion, a function of author number and rank is presented to rightly determine the credit allocated proportion and allocated citations of each author. Our citation allocation scheme is between the equally fractional counting and the one using the inverse of author rank. It has a parameter to adjust the credit distribution among the different authors. The allocated citations can either be used alone to indicate one’s performance in a paper, or can be applied in the modification of h-index and g-index to represent the achievement of a scientist on the whole. The modified h-index and g-index of an author makes use of more papers in which he or she played important roles. Our method is suitable for the papers with wide range of author numbers. 相似文献
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This study, based on the premise that references are a social product that reflects the social environment of a society, is an attempt to explore the co-existence of Korean and non-Korean literature in the references to Korean papers. 321 authors (papers) who published in 43 issues of 24 Korean journals focused on the social sciences were surveyed about their research channels and citation motivations, and the 11,358 references in the papers were analyzed. The findings were as follows : (1) The extent of the co-existence was that non-Korean literature was cited 1.9 times (65.3%) more often than Korean literature; (2) Research channel was the most common non-Korean channel orientation (55.8%); (3) The motivation for citations was significantly dependent on whether the literature cited was Korean or non-Korean. Non-Korean literature was chiefly cited for conceptual (20.7%), perfunctory (16.0%), and persuasive (15.1%) motivations; (4) The citations and citation motivations behind non-Korean literature were significantly influenced by research channel, discipline, focus of research, publishing career, and type of paper. Of these variables, research channel was frequently related to the citation of non-Korean literature. Finally, this study is very suggestive on two counts: (1) Citation motivation might constitute a new approach for exploring the production of knowledge by researchers. (2) This study has demonstrated, in particular, an empirical relationship between knowledge produced by Korean social scientists and non-Korean knowledge through the analysis of citation motivation. 相似文献
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Predicting the future impact of a scientist/researcher is a critical task. The objective of this work is to evaluate different h-index prediction models for the field of Computer Science. Different combinations of parameters have been identified to build the model and applied on a large data set taken from Arnetminer comprised of almost 1.8 million authors and 2.1 million publications’ record of Computer Science. Machine learning prediction technique, regression, is used to find the best set of parameters suitable for h-index prediction for the scientists from all career ages, without enforcing any constraint on their current h-index values with R 2 as a metric to measure the accuracy. Further, these parameters are evaluated for different career ages and different thresholds for h-index values. Prediction results for 1 year are really good, having R 2 0.93 but for 5 years R 2 declines to 0.82 on average. Hence inferred that prediction of h-index is difficult for longer periods. Predictions for the researchers having 1 year experience are not precise, having R 2 0.60 for 1 year and 0.33 for 5 years. Considering scientists of different career ages, average R 2 values for researchers having 20–36 years of experience were 0.99. For the researches having different h-index values, researchers having low h-index were difficult to predict. Parameters set comprising of current h-index, average citations per paper, number of coauthors, years since publishing first article, number of publications, number of impact factor publications, and number of publications in distinct journals performed better than all other combinations. 相似文献
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E. Noma 《Scientometrics》1982,4(3):205-231
Scientific articles may be represented as points in a space whose spatial pattern reflects some of the substantive and social structures of science. The proximity of articles and the documents they reference leads to a centroid scalling method proposed in this paper. This method scales citing articles as close as possible to the articles they reference. The simultaneous scaling of citing and cited articles in a common space aids in the interpretation of the resultant configuration. 相似文献
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G. K?ksal 《国际生产研究杂志》2013,51(23):5009-5029
The quality of products and processes needs to be improved continuously in today's competitive environments. Unless these improvement efforts are focused properly, companies might not achieve desirable results in terms of sales, quality and productivity. Many quality improvement (QI) approaches have a limited evaluation of the factors involved in the selection of QI projects. Theory of constraints (TOC) has been proposed by some researchers as a remedy for the better selection of QI projects. However, these TOC-based approaches do not accurately capture ongoing product quality and its long-term effects on sales. Quality loss, on the other hand, can be used as a measure of customer dissatisfaction, which in turn determines the sales. The paper proposes an improvement of a TOC-based algorithm by incorporating quality loss with it. Using two simple manufacturing examples, it demonstrates that quality losses affect the product mix and QI project selection. It provides suggestions for further research directions for wider applicability of the proposed approach. 相似文献
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BACKGROUND: In conjunction with the German Ministry of Health, the European Regional Office of the World Health Organization (WHO/EURO) held a workshop, "Experiences with Quality Management in an International Context," at Velen Castle, Velen (Nordrhein-Westfalen), Germany, January 15-17, 1998. The approximately 50 participants were selected in part on the basis of recommendations of their respective countries' health ministries. IMPLEMENTATION AND EVALUATION OF QUALITY MANAGEMENT: Possible ways to introduce quality management ranged from introduction of specific process control projects to total quality management (TQM) and reengineering. STRATEGIES FOR IMPLEMENTING QUALITY MANAGEMENT: Working group sessions identified specific strategies for high-level managers, health care providers, and various kinds of consumers to facilitate quality management. For example, managers need to transmit a vision, create a quality management infrastructure, develop reporting structures, establish a system of incentives, and manage the hospital according to the principles of continuous improvement. QUALITY MANAGEMENT MODELS AND TOOLS: Hospitals and other health care providers in Sweden are testing various methods and systems to assess and improve their organizations' ability to meet patients' demands. Benchmarking is being used as a tool for quality management of diabetes care (DiabCare-France). The benchmarking data are processed centrally and made available to the health care providers in a user-friendly format for application to their own quality improvement processes. Clinical databases-registries containing process and outcome data for a well-defined patient population-can be used for quality and technology assessment, to answer questions of treatment effectiveness, and as an information tool. PRINCIPLES AND STRATEGIES FOR QUALITY MANAGEMENT AND DEVELOPMENT: Successful implementation of quality improvement benefits from local, professional, and national policies and objectives. A balance of incentives can reward efficiency or specific activities. Laws, rules, and regulations can be useful, especially if used sparingly. More education is needed at all levels of the health care system about how to understand and use information and information systems. Research is needed on what processes result in favorable outcomes. Despite optimism about the cost-saving potential of quality improvement efforts, many interventions are likely to be cost-effective without actually saving costs. Public release of performance data requires careful consideration, with participation of the professions. 相似文献
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人工湖景观水体在城市中出现的越来越普遍,水体质量也越来越受到重视。该文以校园人工湖为研究对象,对人工湖水体进行了水质检测、水量平衡分析和水质改善方案设计,提出采用地下水补水和雨水收集处理回用的补水换水方式处理以雨水污染为主的人工湖水体,并对实施步骤提出了建议。该套方案目前运行良好,对雨水污染为主的人工湖水体有很好的改善作用。 相似文献
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研究了不同碳酸亚乙烯酯(VC)含量对锰酸锂体系动力电池的高温寿命的影响以及VC在电池循环中的消耗行为,结果表明,VC含量为3%(质量分数)时电池60℃的高温循环性能最佳,电化学交流阻抗(EIS)分析结果表明,随着VC含量的增大,负极SEI阻抗增大,直至含量为3%时达到最大值;还发现5Ah动力电池在60℃循环过程中,随着VC含量的不同,电池在循环一定次数之后,电解液中的VC都会消耗完,说明VC主要参与首次充放电过程中的固体电解质膜(SEI)形成,并在循环的前期参与部分SEI膜的修复,由于VC完全消耗之后电池的寿命曲线并未出现突降,说明VC是否存在对电池后期寿命影响较小。 相似文献
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Mawji Z Stillman P Laskowski R Lawrence S Karoly E Capuano TA Sussman E 《The Joint Commission journal on quality improvement》2002,28(7):373-386
BACKGROUND: Lehigh Valley Hospital's (LVH's; Allentown, Penn) interdisciplinary quality improvement program Primum Non Nocere (PNN), or First Do No Harm, is composed of 12 quality improvement (QI) projects that are a combination of ongoing operations improvement projects and new projects in patient safety. The projects stress delivery of cost-effective medical care while reducing preventable adverse events through improved communication, process redesign, and evidence-based protocol use. EXAMPLE: WRONG-SITE SURGERY: In response to an initial alert warning in 1998, LVH developed a policy of marking "yes" on the surgical site and "no" on the other side. However, several near misses occurred, and a root cause analysis indicated that the policy was not always followed for some very specific reasons. For example, the operative record included no prompt to address laterality, and the procedures in which laterality should be addressed were never specified. Interventions to address these issues were quickly developed that were in keeping with the recommendations outlined in a second alert warning on the issue in December 2001. A year after these stepwise changes, compliance with the policy is almost 100%, and there have been no further near misses. DISCUSSION: Specific project barriers included the initial challenge of changing the mindset in the institution from gradual change on a grand scale to smaller, more rapid changes, analyses, and actions. Another issue identified early in the initiative was the tendency of project groups to outline elaborate process improvements without determining how to measure and monitor success. A project sustainability is inherently linked to its initial strengths and the successful solutions to barriers that are encountered. 相似文献