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   22191篇
  免费   922篇
  国内免费   13篇
  2020年   261篇
  2019年   256篇
  2018年   420篇
  2017年   372篇
  2016年   404篇
  2015年   258篇
  2014年   379篇
  2013年   1625篇
  2012年   647篇
  2011年   703篇
  2010年   376篇
  2009年   459篇
  2008年   611篇
  2007年   608篇
  2006年   567篇
  2005年   500篇
  2004年   481篇
  2003年   472篇
  2002年   430篇
  2001年   802篇
  2000年   801篇
  1999年   588篇
  1998年   249篇
  1997年   223篇
  1995年   198篇
  1992年   490篇
  1991年   423篇
  1990年   489篇
  1989年   410篇
  1988年   391篇
  1987年   369篇
  1986年   389篇
  1985年   442篇
  1984年   343篇
  1983年   289篇
  1982年   225篇
  1979年   325篇
  1978年   260篇
  1977年   207篇
  1976年   203篇
  1975年   302篇
  1974年   353篇
  1973年   350篇
  1972年   277篇
  1971年   244篇
  1970年   211篇
  1969年   228篇
  1968年   290篇
  1967年   251篇
  1966年   272篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
11.
Rowbottom  Darrell P. 《Synthese》2021,198(3):2153-2167
Synthese - First, I identify a methodological thesis associated with scientific realism. This has different variants, but each concerns the reliability of scientific methods in connection with...  相似文献   
12.
The authors tested effects of a 10-week group cognitive-behavioral stress management intervention among 100 women newly treated for Stage 0-II breast cancer. The intervention reduced prevalence of moderate depression (which remained relatively stable in the control condition) but did not affect other measures of emotional distress. The intervention also increased participants' reports that having breast cancer had made positive contributions to their lives, and it increased generalized optimism. Both remained significantly elevated at a 3-month follow-up of the intervention. Further analysis revealed that the intervention had its greatest impact on these 2 variables among women who were lowest in optimism at baseline. Discussion centers on the importance of examining positive responses to traumatic events--growth, appreciation of life, shift in priorities, and positive affect-as well as negative responses.  相似文献   
13.
When some pictures are mirror reversed, aesthetic evaluations of them change dramatically. Stimulus features that may be important in contributing to this effect are: (a) location of areas of principal interest or weight in the picture space, (b) cues that suggest a direction of motion within the picture. Dextrals and inverted sinistrals preferred paintings with cues suggesting motion proceeding from left to right over their mirror-reversed versions and also preferred those with weight concentrated in the left portions of the picture space. The explanation that best fits these data is that preference is promoted when the picture content encourages attention to its rightmost portions, thus placing a majority of the picture in the left visual field where it is directly processed by the right hemisphere.  相似文献   
14.
From the standpoint of a former journal editor and long‐time professional, this commentary challenges the direction of the profession as demonstrated in this special section. The ongoing creation of more and more ethical constraints not only harms the profession but also loses sight of fundamental ethical principles.  相似文献   
15.
Convergent and divergent stereo mechanisms were compared in their ability to recover structure from motion. Contrary to a recent result reported by Richards and Lieberman, no difference in their performance was found; both mechanisms appeared equally capable of supporting the perception of good structure from motion. Possible reasons for the disparate results are discussed.  相似文献   
16.
17.
18.
19.
20.
P Bressan 《Perception》1987,16(5):671-675
If a few parallel horizontal rows of dots are set diagonally, like steps, across the visual field, the inner rows appear not to be horizontal but sloping up to one side; the effect holds as long as the vertical distances between the rows do not exceed a given visual angle. This illusion, described by Vicario in 1978, was never explained. An experiment is reported in which the illusion was still visible at row separations well in excess of the spatial limits originally considered, provided the stimulus elements were enlarged. The maximum illusion was obtained for length ratios (interrow distance to size of dots) identical to those which have been shown to produce the largest effects in a number of illusions of area and length. This suggests that Vicario's illusion is similar to other illusions of extent, and that it can be explained by a neural extent-coding model.  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