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1.
本文对2013年全球发表的天文学天体物理学SCI论文进行了计量分析。结果表明,美国和法国国家科研中心分别是发文最多的国家和机构,而加拿大和史密森尼学会的论文相对引文影响指标最高,中国和俄罗斯以及中国科学院和俄罗斯科学院的论文引文影响力低于世界平均水平。此外,天文学天体物理学领域的基金资助机构以各类科学基金会、国家政府部门和国立科研机构为主。美国是提供基金资助最多的国家,其中又以美国国家科学基金会和国家航空航天局为主。  相似文献   
2.
目的了解植物源性食品中农药残留现状、国内外检测农残的常用方法及其发展动态。方法基于中国知网、维普、万方和Pub Med数据,检索2010.01.01—2020.04.25期间发表的采用气相色谱三重四极杆串联质谱法(gas chromatography-triple quadrupole mass spectrometry,GC-MS/MS)检测植物源性食品中多农药残留的相关文献。应用Note Express3.2.0和Ucinet6.645、NetDraw2.162等对文献进行计量学分析。结果共纳入455篇文献。近10年文献的年发表量呈上升趋势;文献以期刊论文为主,且研究单位合作不太紧密。高频关键词为农药残留、气相色谱-串联质谱和QuEChERS等。结论近10年来对于多农药残留的检测是目前研究的一大方向,且大多采用气相色谱-三重四极杆串联质谱法,该检测方法的研究也在不断地深入,逐渐趋于成熟。  相似文献   
3.
微纳制造技术文献计量分析   总被引:1,自引:0,他引:1  
对微纳制造技术领域2000-2010年时间段的SCI和EI文献计量分析,结果显示,近年来该领域的研究呈现出增长趋势,美国在微纳制造领域的研究处于绝对领先的地位.SCI文献分析表明,纳米尺度的制造技术、微米尺度的制造技术、微机电系统、微流体、微加工等是近年来研究的热点领域;EI分析则显示,光刻技术、微加工、微机电器件、纳米结构材料、扫描电子显微镜等是研究的热点.  相似文献   
4.
通过对学术期刊的历时性研究可以透视某学科或领域的研究热点与发展趋势.基于CSSCI(2006-2012年)的数据,利用CiteSpace软件对《现代大学教育》载文的关键词、作者和参考文献进行了文献计量分析,并做出其知识图谱.结果表明:刊物的载文量呈平稳状态,拥有一批基数庞大、集中度较高的作者群体,少数学术精英对该刊办刊质量起着重要作用;“高等教育质量”、“大学治理与管理”、“研究生教育”、“教育政策与大学发展”及“大学文化与学术文化”是该刊载文所研究的热点,华中科技大学教育科学研究院、厦门大学教育研究院等机构对该刊发展起到了重要支撑作用.  相似文献   
5.
Due to the tremendous increase and variations in serial publications, the impact of every peer-reviewed paper on different subjects is varying continually. Domain experts or researchers want to keep track of those latest and highly cited peer-reviewed papers; however they are finding it difficult to update or collect their subject core paper lists regularly and accurately. The evaluation of serial papers for generating and ranking core paper lists on different subjects becomes a very challenging task for scholars or librarians. Therefore, a computer-aided bibliometric system (CABS) was developed to generate a core article ranked list automatically. Four indicators - subject reference cited counts, subject total cited counts, subject reference period impact and subject reference cited history - were proposed to generate a subject core article ranking list. Seven different subjects including E-commerce, Data Mining, Supply Chain, Image Processing, Enterprise Resource Planning, Microarray and Expert Systems were used as samples. The turning point (TP) was proposed to determine the core article area in the paper citation analysis. The TP patterns observed were that all TPs had the same rate for four different subjects. The usage of TP patterns can also be used to verify the experimental results. This study provides experimental evidence to disprove three myths. Myth 1: the top papers on a subject (for instance, the top 10 papers) were all submitted to (S)SCI journals. Myth 2: the highly cited papers (cited counts >4) on interdisciplinary subjects were almost submitted to (S)SCI journals. Myth 3: the articles published in the top journals on a subject would be highly cited.  相似文献   
6.
During the last years, the impacts caused by digital transformation on companies have been disruptive. Contrarily to prior technological revolutions, the current scenario is characterized by the rapid growth of innovation that has impacted organizations differently. In particular, an increasing number of organizations revised their management control systems to adequate their business models to the external pressures made by competitors and regulators. The research aims consist of a bibliometric analysis about the impacts caused by digital transformation on managerial auditing. The research reveals the existence of four independent research area: continuous auditing (Green Cluster), fraud detection (Blue Cluster), data analytics (Yellow Cluster) and technological innovation (Red Cluster). Finally, we developed a research agenda in order to address future research.  相似文献   
7.
遥感数据是影响遥感科学研究方法、实验思路、解决方案的重要因素之一。以探索面向遥感科学数据的学科情报分析框架为目标,以《Remote Sensing of Environment》期刊1999~2018年发表的学术论文为例,利用文献计量和知识图谱分析方法,展现遥感科学数据的利用情况。结果表明:满足特定专业领域需求的遥感科学数据日益丰富,光学遥感、微波遥感和激光雷达数据的应用结构已发生明显变化,从20世纪90年代的8∶1∶1发展为5∶3∶2,多角度观测、机载观测平台等新型观测方式展现出独特的优势。遥感科学数据和相关研究分析方法的发展和完善,不断推动对复杂地理生态过程以及人类活动对环境影响的系统化、综合性理解。  相似文献   
8.
Despite intensive public and private research efforts into developing fuel cell vehicles (FCV), the global number of FCV remains small and they are unavailable for commercial purchase. We use an in-depth literature review, and bibliometric and patent analysis to analyse FCV technology within the conceptual framework of Rogers' innovation diffusion curve and suggest how the particular innovation systems and policies adopted in three key Asian car-manufacturing countries (Japan, Korea, and China) have influenced the development of FCV. Such analysis may capture trends not indicated by technical measures such as increases in efficiency or decreases in unit cost. Although Japan continues to lead in terms of number of patents and quality of academic research, Korea and China have been successful in developing fuel cell programs. Korean academics patent more frequently than their Japanese and Chinese peers, producing 18% of FC patents, with 16% of those filed also naming a private company. The 2008 financial crisis and ongoing economic uncertainty appears to have had some effect on patent activity whilst academic research appears unaffected. Diffusion curve analysis suggests that FCVs have not reached technological maturity.  相似文献   
9.
Sodium borohydride as a fuel for the future   总被引:2,自引:0,他引:2  
In a time of unprecedented change in environmental, geopolitical and socio-economic world affairs, the search for new energy materials has become a topic of great relevance. Sodium borohydride, NaBH4, seems to be a promising fuel in the context of the future hydrogen economy. NaBH4 belongs to a class of materials with the highest gravimetric hydrogen densities, which has been discovered in the 1940s by Schlesinger and Brown. In the present paper, the most relevant issues concerning the use of NaBH4 are examined. Its basic properties are summarised and its synthesis methods are described. The general processes of NaBH4 oxidation, hydrolysis, and monitoring are reviewed. A comprehensive bibliometric analysis of the NaBH4 publications in the energy field opens the discussion for current perspectives and future outlook of NaBH4 as an efficient energy/hydrogen carrier. Despite the observed exponential increase in the research on NaBH4 it is clear that further efforts are still necessary for achieving significant overchanges.  相似文献   
10.
Moringa is a tropical plant well known in Asia and Africa. Many local medicines used the various Moringa extracts to cure various diseases or to provide nutrients. Some parts of the plant are also use as coagulants to clean water and for their biomedical properties. The regional development of developing countries is often linked to their natural resources and applied research and technology information are two main points to explore before decision making. For these reasons we present a comparison between data coming from an academic research using different sources and patent information using the worldpatent database from EPO.  相似文献   
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