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1.
In the recent debate on the use of averages of ratios (AoR) and ratios of averages (RoA) for the compilation of field-normalized citation rates, little evidence has been provided on the different results obtained by the two methods at various levels of aggregation. This paper provides such an empirical analysis at the level of individual researchers, departments, institutions and countries. Two datasets are used: 147,547 papers published between 2000 and 2008 and assigned to 14,379 Canadian university professors affiliated to 508 departments, and all papers indexed in the Web of Science for the same period (N = 8,221,926) assigned to all countries and institutions. Although there is a strong relationship between the two measures at each of these levels, a pairwise comparison of AoR and RoA shows that the differences between all the distributions are statistically significant and, thus, that the two methods are not equivalent and do not give the same results. Moreover, the difference between both measures is strongly influenced by the number of papers published as well as by their impact scores: the difference between AoR and RoA is greater for departments, institutions and countries with low RoA scores. Finally, our results show that RoA relative impact indicators do not add up to unity (as they should by definition) at the level of the reference dataset, whereas the AoR does have that property.  相似文献   
2.
本文包括三部分内容.第一,通过自相关函数的算法得出F_0曲线.第二,利用曲线拟合确定调形.第三,提出声调曲线的新的规整方法,确定调值.  相似文献   
3.
为了具体了解学术期刊的现况,对全国各系统220名学术期刊主编进行了问卷调查。问卷中共26个提问,涉及稿源、审稿、编辑、经费、人员、管理、产业化、国际化、规范化等。通过统计分析,可以从一个方面了解学术期刊的现状、存在的主要问题,为制定相关对策提供了参考资料。  相似文献   
4.
现代汉语词汇规范问题是词汇研究的重要内容之一,应该对动态的词汇现象进行有效的规范。对此从词汇规范应遵循的基本原则、依据和方法,现阶段规范普通话的依据,普通话词汇规范的主要方法等方面对现代汉语词汇规范提出自己的看法。  相似文献   
5.
以药学研究生的科研原始记录为例,提出从科研原始记录入手,从源头对科研行为规范进行约束的观点。论述科研原始记录的作用,包括对药学试验记录的规范要求,通过实证分析,对科研原始记录的规范与管理提出建议,为培养科研诚信的青年科研后备人才,促进科技进步提供参考。  相似文献   
6.
随着互联网技术兴起,人类信息积累速度越来越快,对网页信息自动抽取的需求随之变大。本文对现今网页信息扫描和抽取特点进行分析,对其存在的问题给予阐述,并结合PHP语言,解析如何运用其相关技术对网页信息实现企业级别的精确提取。  相似文献   
7.
专利信息组织整理中的标准化建设   总被引:2,自引:0,他引:2  
马海群 《情报科学》2000,18(4):293-295
专利文献不仅具有数量大、范围广、可靠性强等突出优点,而且同任何文献相比,专利信息组织整理中的标准化,规范化、统一化都是独树一帜的。具体表现在专利申请文件、专利说明书题录、专利文献种类代码、专利分类体系、专利数据库结构等许多方面。专利信息组织加工中的这种标准化建设,不仅促进了专利信息的传播与国际交流,而且极大地推动了文献工作的标准化发展进程。  相似文献   
8.
We address the question how citation-based bibliometric indicators can best be normalized to ensure fair comparisons between publications from different scientific fields and different years. In a systematic large-scale empirical analysis, we compare a traditional normalization approach based on a field classification system with three source normalization approaches. We pay special attention to the selection of the publications included in the analysis. Publications in national scientific journals, popular scientific magazines, and trade magazines are not included. Unlike earlier studies, we use algorithmically constructed classification systems to evaluate the different normalization approaches. Our analysis shows that a source normalization approach based on the recently introduced idea of fractional citation counting does not perform well. Two other source normalization approaches generally outperform the classification-system-based normalization approach that we study. Our analysis therefore offers considerable support for the use of source-normalized bibliometric indicators.  相似文献   
9.
今年是《中日和平友好条约》缔结30周年,回顾中日邦交正常化的历史进程,廖承志作为中国政府对日工作的最高负责人,在发展中日友好和推动两国关系在官方和民间两个层次上同时发展发挥了独特的历史作用。同时,中日邦交正常化也是日本对华友好人士长期努力的结果,其中,日本创价学会会长池田大作的贡献尤为突出。池田大作创办创价大学,成立公明党,关键时刻发表了“日中邦交正常化倡言”,为日本朝野指明了实现邦交正常化的正确方向和途径。中日邦交正常化后,廖承志、池田大作依然为中日友好事业奋斗不息。  相似文献   
10.
To take into account the impact of the different bibliometric features of scientific fields and different size of both the publication set evaluated and the set used as reference standard, two new impact indicators are introduced. The Percentage Rank Position (PRP) indicator relates the ordinal rank position of the article assessed to the total number of papers in the publishing journal. The publications in the publishing journal are ranked by the decreasing citation frequency. The Relative Elite Rate (RER) indicator relates the number of citations obtained by the article assessed to the mean citation rate of the papers in the elite set of the publishing journal. The indices can be preferably calculated from the data of the publications in the elite set of journal papers of individuals, teams, institutes or countries. The number of papers in the elite set is calculated by the equation: P(πv) = (10 log P) ? 10, where P is the total number of papers. The mean of the PRP and RER indicators of the journal papers assessed may be applied for comparing the eminence of publication sets across fields.  相似文献   
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