首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   7085篇
  免费   33篇
  国内免费   6篇
教育   4853篇
科学研究   984篇
各国文化   17篇
体育   359篇
综合类   8篇
文化理论   148篇
信息传播   755篇
  2023年   20篇
  2022年   21篇
  2021年   23篇
  2020年   45篇
  2019年   68篇
  2018年   791篇
  2017年   823篇
  2016年   588篇
  2015年   117篇
  2014年   130篇
  2013年   553篇
  2012年   192篇
  2011年   410篇
  2010年   393篇
  2009年   232篇
  2008年   286篇
  2007年   421篇
  2006年   71篇
  2005年   166篇
  2004年   211篇
  2003年   147篇
  2002年   77篇
  2001年   88篇
  2000年   84篇
  1999年   63篇
  1998年   54篇
  1997年   53篇
  1996年   51篇
  1995年   26篇
  1994年   33篇
  1993年   21篇
  1992年   45篇
  1991年   45篇
  1990年   29篇
  1989年   39篇
  1988年   34篇
  1987年   31篇
  1986年   35篇
  1985年   39篇
  1984年   38篇
  1983年   24篇
  1982年   34篇
  1981年   25篇
  1979年   35篇
  1978年   30篇
  1977年   21篇
  1976年   17篇
  1974年   21篇
  1972年   25篇
  1971年   19篇
排序方式: 共有7124条查询结果,搜索用时 0 毫秒
41.
42.
Dawn of science     
T. Padmanabhan 《Resonance》2011,16(10):950-955
Descartes discovered the link between algebra and geometry, which forms the cornerstone of applied geometry today.  相似文献   
43.
Polarography     
J Heyrovsky’s invention of polarography in which a dropping mercury electrode is used in the electrochemical cell revolutionised electroanalysis, study of electrode kinetics and adsorption studies on mercury electrodes. Polarography has also directly contributed to the development of new and innovative ideas in electrochemical techniques, instrumentation and applications  相似文献   
44.
This paper considers the history of the emergence and development of cooperative cataloging in Russia and abroad and presents the first projects and programs in the field of cooperative cataloging: CONSER, NACO, BIBCO, and PCC. It elucidates the activity of the OCLC Center and Consortium of European Scientific Libraries, which are the first-rate international cooperative associations, as well as the ARBIKON Association and LIBNET centers which are Russian centers of cooperative cataloging.  相似文献   
45.
This paper analyzes modern information technologies as applied in the political environment and considers the content and peculiarities of using IT programs in strategic political modeling.  相似文献   
46.
The main aspects of the creation of a monitoring system for the research activities of the members of a higher-education institution are considered. The scientific activities of the lecturers and members of Turgenev Orel State University is used as the basis. It is expected that this system will be an efficient tool for optimal managerial decisions at all levels.  相似文献   
47.
The analysis results for the basic indicators of innovative activities in the All-Russian Institute for Scientific and Technical Information (VINITI), Russian Academy of Science, are given. Suggestions for optimization are provided and the plan of innovative activities of VINITI is drawn on the basis on the analysis results, which is aimed at the further development of the institute.  相似文献   
48.
Though there is a long tradition of band members quitting the group or taking a hiatus, the rock group as an organization to produce music continues to be both popular and economically viable. The research question addressed in this paper is whether or not it is a good idea to quit or take a hiatus from the group. We begin with a discussion of the framework for understanding why groups are formed and why they may be difficult to keep together. We then discuss differences between groups in the decade of the 1960s versus today. We argue that there is something unique about the output of the group even with the changes in the structure of contracts, compensation, and consumer focus on the artist that explain the resilience of the rock band as an organizational form within which to create music. We compare the charting success of bands that have members leave the group with the charting success of the members who left the group. We identified the groups in five representative years: 1965, 1975, 1985, 1995, and 2005. We then analyzed the entire Billboard Hot 100 charting careers of those groups and the artists who quit those groups. Our main finding is that when charting success is divided equally among members, going solo pays off—there is a clear economic rationale because solo acts have greater average charting success than the original bands they started in. The other ensuing side projects: duos, collaborations, and other groups are not as lucrative as the original bands. These findings are valid for members of charting groups from each of the 5 years examined. Despite the difficulties in keeping a rock band together, there are fewer band breakups today and remaining with the group generally results in a longer and more productive charting career. Thus, the rock group remains an important organization for producing contemporary music. However, there remains a compelling incentive to go solo. Superstars may benefit from solo projects, but for the average, non-superstar group member, in many circumstances it is better for the band to stay together if the income is divided equally.  相似文献   
49.
50.
K. R. Shivanna 《Resonance》2016,21(11):1007-1018
After the pollen grain reaches the stigma through outsourced agents (pollinators), the next step before fertilization is to select the right type of pollen. Similar to a marriage in human beings, fiowering plants also have evolved elaborate screening process to select the right pollen grains and to reject the wrong ones. Even after initial screening for the right pollen, the pistil imposes a tough competition amongst them, comparable to a swayamvara of Indian mythology, to select the best available pollen. Flowering plants have evolved into a matriarchal society. The selection of the male partner is totally the prerogative of the mother (pistil); the boy (pollen grain) and the girl (ovule) has no say in this selection.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号