全文获取类型
收费全文 | 36981篇 |
免费 | 1653篇 |
国内免费 | 28篇 |
专业分类
38662篇 |
出版年
2020年 | 454篇 |
2019年 | 467篇 |
2018年 | 744篇 |
2017年 | 697篇 |
2016年 | 725篇 |
2015年 | 511篇 |
2014年 | 645篇 |
2013年 | 2766篇 |
2012年 | 1153篇 |
2011年 | 1264篇 |
2010年 | 707篇 |
2009年 | 766篇 |
2008年 | 1032篇 |
2007年 | 1009篇 |
2006年 | 907篇 |
2005年 | 790篇 |
2004年 | 766篇 |
2003年 | 743篇 |
2002年 | 699篇 |
2001年 | 1403篇 |
2000年 | 1378篇 |
1999年 | 971篇 |
1998年 | 403篇 |
1997年 | 369篇 |
1993年 | 316篇 |
1992年 | 804篇 |
1991年 | 702篇 |
1990年 | 789篇 |
1989年 | 706篇 |
1988年 | 668篇 |
1987年 | 625篇 |
1986年 | 669篇 |
1985年 | 708篇 |
1984年 | 541篇 |
1983年 | 464篇 |
1982年 | 336篇 |
1979年 | 502篇 |
1978年 | 406篇 |
1977年 | 320篇 |
1976年 | 316篇 |
1975年 | 469篇 |
1974年 | 564篇 |
1973年 | 528篇 |
1972年 | 465篇 |
1971年 | 390篇 |
1970年 | 345篇 |
1969年 | 413篇 |
1968年 | 467篇 |
1967年 | 402篇 |
1966年 | 439篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
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
2.
Robert M. Klassen Rebecca P. Ang Wan Har Chong Lindsey L. Krawchuk Vivien S. Huan Isabella Y.F. Wong Lay See Yeo 《Psychologie appliquee》2010,59(3):361-379
Two studies are reported examining academic procrastination and motivation in 1,145 university students from Canada and Singapore. In Study 1, relationships between procrastination and motivation variables were found to be similar across contexts, with self‐efficacy for self‐regulated learning most strongly associated with procrastination in both contexts. In Study 2, patterns of procrastinating behavior and the negative impact of procrastination were examined and compared in Canadian and Singaporean undergraduates. Participants in both contexts reported writing to be the academic task most prone to procrastination. More Singaporeans than Canadians were classified as negative procrastinators (i.e. rated procrastination as a negative influence on academic functioning). In both contexts, negative procrastinators spent more time procrastinating than neutral procrastinators and displayed lower self‐efficacy for self‐regulated learning. On décrit deux recherches portant sur la motivation et la procrastination universitaire (tendance à remettre au lendemain) de 1145 étudiants du Canada et de Singapour. Dans la première étude, les relations entre la motivation et la procrastination sont apparues être analogues dans les deux pays, la variable la plus fortement associéà la procrastination étant l'auto‐efficience pour l'apprentissage autorégulé. Dans la deuxième étude, les schémas comportementaux de procrastination et son impact négatif ont été analysés et comparés chez les étudiants de 1° cycle canadiens et singapouriens. Les sujets des deux pays ont mentionné la rédaction comme étant la tâche universitaire la plus soumise à la procrastination. Davantage de Singapouriens que de Canadiens été classés en procrastinateurs négatifs (c'est‐à‐dire que la procrastination est considérée comme étant un handicap pour les études). Dans les deux cas, les procrastinateurs négatifs gaspillaient plus de temps que les procrastinateurs neutres et manifestaient une moindre auto‐efficience pour l'apprentissage autorégulé. 相似文献
3.
4.
La littérature portant sur la culture des organisations souffre d'un manque manifeste d'enquêtes extensives débouchant sur des études comparatives. Afin de rendre plus comparables les cultures organisationnelles, nous proposons une définition et une série de dimensions. La culture organisationnelle renverrait aux perceptions communes des pratiques de travail dans le cadre des unités constitutives des organisations. A l'examen d'études empiriques, les cinq dimensions suivantes nous sont apparues: autonomie, orientation externe, coordination interdépartementale, orientation vers les ressources humaines et orientation vers le développement. L'utilisation de cette définition et de ces dimensions générales devrait faciliter la comparaison des cultures organisationnelles et l'accumulation de résultats.
Within the body of organisation culture literature, there is a conspicuous absence of large-scale studies reporting on comparative studies. In order to increase comparability of organisational cultures we propose a definition and a set of dimensions. Organisational culture is defined as shared perceptions of organisational work practices within organisational units. On the basis of empirical studies we discerned the following five dimensions: autonomy, external orientation, interdepartmental coordination, human resource orientation, and improvement orientation. Use of this definition and a set of such generic dimensions would facilitate the comparison of organisational cultures and the accumulation of research findings. 相似文献
Within the body of organisation culture literature, there is a conspicuous absence of large-scale studies reporting on comparative studies. In order to increase comparability of organisational cultures we propose a definition and a set of dimensions. Organisational culture is defined as shared perceptions of organisational work practices within organisational units. On the basis of empirical studies we discerned the following five dimensions: autonomy, external orientation, interdepartmental coordination, human resource orientation, and improvement orientation. Use of this definition and a set of such generic dimensions would facilitate the comparison of organisational cultures and the accumulation of research findings. 相似文献
5.
6.
7.
8.
9.
M H Antoni J M Lehman K M Kilbourn A E Boyers J L Culver S M Alferi S E Yount B A McGregor P L Arena S D Harris A A Price C S Carver 《Health psychology》2001,20(1):20-32
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
10.
Using a Piagétan perspective, this study investigated the ways in which elementary school children perceive changes in the size of a televised image (in this case, a candy bar). The findings suggest that younger children perceive changes in image size from a medium shot to a close-up as changes in the object itself. Children's responses to changes in the televised image parallel their responses to traditional conservation tasks, but conservation of televised images occurs at a later age. In addition, children appear to use different cognitive skills to interpret how a zoom or a cut transforms the size of a televised image. When a zoom is used, children more readily perceive the object as “growing larger.” 相似文献