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   69923篇
  免费   2763篇
  国内免费   39篇
  72725篇
  2020年   744篇
  2019年   941篇
  2018年   1354篇
  2017年   1381篇
  2016年   1466篇
  2015年   1001篇
  2014年   1195篇
  2013年   5938篇
  2012年   2154篇
  2011年   2308篇
  2010年   1370篇
  2009年   1366篇
  2008年   2030篇
  2007年   2061篇
  2006年   1793篇
  2005年   1649篇
  2004年   1597篇
  2003年   1491篇
  2002年   1549篇
  2001年   2280篇
  2000年   2179篇
  1999年   1674篇
  1998年   849篇
  1997年   739篇
  1996年   693篇
  1995年   673篇
  1994年   649篇
  1993年   660篇
  1992年   1358篇
  1991年   1296篇
  1990年   1266篇
  1989年   1165篇
  1988年   1135篇
  1987年   1094篇
  1986年   1120篇
  1985年   1175篇
  1984年   914篇
  1983年   812篇
  1979年   943篇
  1978年   705篇
  1975年   829篇
  1974年   917篇
  1973年   905篇
  1972年   776篇
  1971年   703篇
  1970年   670篇
  1969年   648篇
  1968年   834篇
  1967年   804篇
  1966年   720篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
P A Kolers  M Green 《Perception》1984,13(3):249-254
Two shapes of either the same or different color will seem to be in smooth apparent motion with like-colored mates, at proper conditions of flash timing and spacing. An experiment is reported in which the condition was tested for unlike-colored pairs, for example red-green alternated with green-red. The question of interest was how the visual system would resolve the disparity of color. An 'intelligent' solution would rotate the shapes in three dimensions. Like-colored and unlike-colored parts were found to move and transform similarly, however, the resolution being dependent more upon timing than upon color. The motion of intelligence as it might be applied to vision is discussed in light of these results.  相似文献   
3.
The present study explored the availability of flexible work arrangements (FWA) and their relationship with manager outcomes of job satisfaction, turnover intentions, and work‐to‐family conflict (WFC) across country clusters. We used individualism and collectivism to explain differences in FWA availability across Latin American, Anglo, and Asian clusters. Managers from the Anglo cluster were more likely to report working in organisations that offer FWA compared to managers from other clusters. For Anglo managers, flextime was the only FWA that had significant favorable relationships with the outcome variables. For Latin Americans, part‐time work negatively related with turnover intentions and strain‐based WFC. For Asians, flextime was unrelated to time‐based WFC, and telecommuting was positively associated with strain‐based WFC. The clusters did not moderate the compressed work week and outcome relationships. Implications for practitioners adopting FWA practices across cultures are discussed.  相似文献   
4.
5.
6.
7.
8.
9.
The purpose of this study is to compare field investigative interviews of children (FIIC) with three different legal outcomes in child sexual abuse cases: (i) insufficient evidence to proceed (IEP); (ii) convictions; or (iii) acquittals by the court. One hundred FIIC were divided into one of the three outcome possibilities. Amongst the female interviewees older than 10 years, there were no cases of acquittals and the convicted cases were over-represented. The children's response to open questions was found to be the main difference between the three FIIC outcomes. The responses to these open questions were 1.9 and 2.3 times longer in the convicted cases compared to acquittals and IEP. Possible explanations for the result are discussed. Copyright © 2009 John Wiley & Sons, Ltd.  相似文献   
10.
Range of electric vehicles (EVs) has long been considered a major barrier in acceptance of electric mobility. We examined the nature of how range is experienced in an EV and whether variables from other adaptation contexts, notably stress, have explanatory power for inter‐individual differences in what we term comfortable range. Forty EVs were leased to a sample of users for a 6‐month field study. Qualitative and quantitative analyses of range experiences were performed, including regression analyses to examine the role of stress‐buffering personality traits and coping skills in comfortable range. Users appraised range as a resource to which they could successfully adapt and that satisfied most of their daily mobility needs. However, indicators were found that suggested suboptimal range utilisation. Stress‐buffering personality traits (control beliefs, ambiguity tolerance) and coping skills (subjective range competence, daily range practice) were found to play a substantial role in comfortable range. Hence, it may be possible to overcome perceived range barriers with the assistance of psychological interventions such as information, training, and interface design. Providing drivers with a reliable usable range may be more important than enhancing maximal range in an electric mobility system.  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