全文获取类型
收费全文 | 44172篇 |
免费 | 1735篇 |
国内免费 | 21篇 |
专业分类
45928篇 |
出版年
2019年 | 444篇 |
2018年 | 714篇 |
2017年 | 682篇 |
2016年 | 722篇 |
2015年 | 487篇 |
2014年 | 663篇 |
2013年 | 3175篇 |
2012年 | 1159篇 |
2011年 | 1241篇 |
2010年 | 744篇 |
2009年 | 794篇 |
2008年 | 1146篇 |
2007年 | 1086篇 |
2006年 | 1032篇 |
2005年 | 896篇 |
2004年 | 874篇 |
2003年 | 877篇 |
2002年 | 841篇 |
2001年 | 1346篇 |
2000年 | 1350篇 |
1999年 | 1031篇 |
1998年 | 465篇 |
1997年 | 466篇 |
1996年 | 441篇 |
1992年 | 922篇 |
1991年 | 827篇 |
1990年 | 868篇 |
1989年 | 777篇 |
1988年 | 767篇 |
1987年 | 731篇 |
1986年 | 800篇 |
1985年 | 830篇 |
1984年 | 675篇 |
1983年 | 590篇 |
1982年 | 446篇 |
1981年 | 436篇 |
1979年 | 690篇 |
1978年 | 554篇 |
1977年 | 463篇 |
1976年 | 469篇 |
1975年 | 596篇 |
1974年 | 742篇 |
1973年 | 763篇 |
1972年 | 592篇 |
1971年 | 585篇 |
1970年 | 515篇 |
1969年 | 566篇 |
1968年 | 700篇 |
1967年 | 622篇 |
1966年 | 655篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
1.
2.
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.
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
4.
5.
6.
Kim-Phuong L. Vu Robert W. Proctor 《The Quarterly Journal of Experimental Psychology Section A: Human Experimental Psychology》2004,57(3):539-556
In two-choice tasks, the compatible mapping of left stimulus to left response and right stimulus to right response typically yields better performance than does the incompatible mapping. Nonetheless, when compatible and incompatible mappings are mixed within a block of trials, the spatial compatibility effect is eliminated. Two experiments evaluated whether the elimination of compatibility effects by mixing compatible and incompatible mappings is a general or specific phenomenon. Left-right physical locations, arrow directions, and location words were mapped to keypress responses in Experiment 1 and vocal responses in Experiment 2. With keypresses, mixing compatible and incompatible mappings eliminated the compatibility effect for physical locations and arrow directions, but enhanced it for words. With vocal responses, mixing significantly reduced the compatibility effect only for words. Overall, the mixing effects suggest that elimination or reduction of compatibility effects occurs primarily when the stimulus-response sets have both conceptual and perceptual similarity. This elimination may be due to suppression of a direct response-selection route, but to account for the full pattern of mixing effects it is also necessary to consider changes in an indirect response-selection route and the temporal activation properties of different stimulus-response sets. 相似文献
7.
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
8.
9.
10.