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   184210篇
  免费   8134篇
  国内免费   155篇
  192499篇
  2020年   2787篇
  2019年   3454篇
  2018年   3754篇
  2017年   4121篇
  2016年   4781篇
  2015年   3941篇
  2014年   4802篇
  2013年   23470篇
  2012年   5086篇
  2011年   4344篇
  2010年   4095篇
  2009年   4886篇
  2008年   4435篇
  2007年   3988篇
  2006年   4436篇
  2005年   4308篇
  2004年   3878篇
  2003年   3467篇
  2002年   3259篇
  2001年   4031篇
  2000年   3782篇
  1999年   3555篇
  1998年   2882篇
  1997年   2698篇
  1996年   2621篇
  1995年   2449篇
  1994年   2412篇
  1993年   2370篇
  1992年   2923篇
  1991年   2727篇
  1990年   2564篇
  1989年   2481篇
  1988年   2438篇
  1987年   2405篇
  1986年   2423篇
  1985年   2665篇
  1984年   2650篇
  1983年   2408篇
  1982年   2406篇
  1981年   2364篇
  1980年   2213篇
  1979年   2357篇
  1978年   2265篇
  1977年   2213篇
  1976年   2020篇
  1975年   2097篇
  1974年   2190篇
  1973年   2071篇
  1972年   1663篇
  1971年   1605篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
131.
Ohne ZusammenfassungIn dankbarer Erinnerung an meinen verehrten Münchener Lehrer Kurt Huber, dessen frühzeitigen gewaltsamen Tod (13. 7. 43) wir noch immer beklagen. Die Arbeit entsprang einer seiner letzten wissenschaftlichen Anregungen.  相似文献   
132.
133.
134.
135.
Are different responses differentially associable with their consequences? An overshadowing design was used to try to answer this question for three responses previously studied in golden hamsters. In Experiment I, scrabbling was rapidly suppressed by electric shock punishment, and it overshadowed a tone which occurred between scrabbling and shock. In Experiment II, no evidence of response-shock association was obtained when open rearing was the punished response, and open rearing did not overshadow the tone. Punishment had some effect on face washing, but there was no statistically significant overshadowing with this response. These results are consistent with the idea that differences in punishment suppression among these three responses have an associative basis. They also demonstrate the usefulness of a novel paradigm for studying “preparedness” of response-reinforcer associations.  相似文献   
136.
137.
138.
139.
140.
Shaw  Jamie 《Synthese》2021,198(1):419-449

To anyone vaguely aware of Feyerabend, the title of this paper would appear as an oxymoron. For Feyerabend, it is often thought, science is an anarchic practice with no discernible structure. Against this trend, I elaborate the groundwork that Feyerabend has provided for the beginnings of an approach to organizing scientific research. Specifically, I argue that Feyerabend’s pluralism, once suitably modified, provides a plausible account of how to organize science. These modifications come from C.S. Peirce’s account of the economics of theory pursuit, which has since been corroborated by empirical findings in the social sciences. I go on to contrast this approach with the conception of a ‘well-ordered science’ as outlined by Kitcher (Science, truth, and democracy, Oxford University Press, New York, 2001), Cartwright (Philos Sci 73(5):981–990, 2006), which rests on the assumption that we can predict the content of future research. I show how Feyerabend has already given us reasons to think that this model is much more limited than it is usually understood. I conclude by showing how models of resource allocation, specifically those of Kitcher (J Philos 87:5–22, 1990), Strevens (J Philos 100(2):55–79, 2003) and Weisberg and Muldoon (Philos Sci 76(2):225–252, 2009), unwittingly make use of this problematic assumption. I conclude by outlining a proposed model of resource allocation where funding is determined by lottery and briefly examining the extent to which it is compatible with the position defended in this paper.

  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