全文获取类型
收费全文 | 93409篇 |
免费 | 1958篇 |
国内免费 | 4篇 |
专业分类
管理学 | 12669篇 |
民族学 | 541篇 |
人才学 | 25篇 |
人口学 | 7328篇 |
丛书文集 | 526篇 |
教育普及 | 2篇 |
理论方法论 | 9514篇 |
现状及发展 | 1篇 |
综合类 | 2185篇 |
社会学 | 43596篇 |
统计学 | 18984篇 |
出版年
2023年 | 511篇 |
2021年 | 571篇 |
2020年 | 1516篇 |
2019年 | 2213篇 |
2018年 | 2127篇 |
2017年 | 3200篇 |
2016年 | 2412篇 |
2015年 | 2064篇 |
2014年 | 2640篇 |
2013年 | 18900篇 |
2012年 | 2456篇 |
2011年 | 2301篇 |
2010年 | 2012篇 |
2009年 | 2206篇 |
2008年 | 2082篇 |
2007年 | 1904篇 |
2006年 | 2137篇 |
2005年 | 2327篇 |
2004年 | 2190篇 |
2003年 | 1934篇 |
2002年 | 2034篇 |
2001年 | 2102篇 |
2000年 | 1891篇 |
1999年 | 1757篇 |
1998年 | 1525篇 |
1997年 | 1400篇 |
1996年 | 1354篇 |
1995年 | 1364篇 |
1994年 | 1336篇 |
1993年 | 1335篇 |
1992年 | 1334篇 |
1991年 | 1268篇 |
1990年 | 1239篇 |
1989年 | 1094篇 |
1988年 | 1182篇 |
1987年 | 1044篇 |
1986年 | 952篇 |
1985年 | 1115篇 |
1984年 | 1181篇 |
1983年 | 1061篇 |
1982年 | 977篇 |
1981年 | 879篇 |
1980年 | 827篇 |
1979年 | 906篇 |
1978年 | 794篇 |
1977年 | 713篇 |
1976年 | 666篇 |
1975年 | 647篇 |
1974年 | 537篇 |
1973年 | 456篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
21.
Susan D. Calkins Susan E. Dedmon Kathryn L. Gill Laura E. Lomax Laura M. Johnson 《Infancy》2002,3(2):175-197
A study sample of 162 six‐month‐old children was selected from a larger sample of 346 infants on the basis of parents' report of their infants' temperament and a laboratory assessment of temperament. Infants were classified as easily frustrated and less easily frustrated and compared on a number of emotion regulation, physiology, and temperament measures. Results indicated that male and female infants were equally likely to be classified as frustrated and less easily frustrated; however, male infants were less able to regulate physiologically. Easily frustrated infants used different emotion regulation strategies and were observed to be less attentive and more active than less easily frustrated infants when observed in the laboratory. These infants were also characterized by their parents as more active, less attentive, and more distressed to novelty. Infants classified as easily frustrated were more reactive physiologically and less able to regulate physiological reactivity than their less easily frustrated counterparts. It is hypothesized that this cluster of characteristics may constitute a unique temperamental type that may have implications for other types of behavioral functioning. Limitations of the study are that observations are based on a single brief assessment of the infant, modest effect sizes were found, and the study is cross‐sectional. 相似文献
22.
A.M. Mathai 《Revue canadienne de statistique》1993,21(3):277-283
The product of two independent or dependent scalar normal variables, sums of products, sample covariances, and general bilinear forms are considered. Their distributions are shown to belong to a class called generalized Laplacian. A growth-decay mechanism is also shown to produce such a generalized Laplacian. Sets of necessary and sufficient conditions are derived for bilinear forms to belong to this class. As a generalization, the distributions of rectangular matrices associated with multivariate normal random vectors are also discussed. 相似文献
23.
24.
Tracy AJ Erkut S 《Sociological perspectives : SP : official publication of the Pacific Sociological Association》2002,45(4):445-466
Athletics is the most prominent extracurricular activity in U.S. secondary schools in terms of student participation and school budgets. The latter is often justified on the grounds that healthy bodies produce healthy minds, that school sports boost school spirit, and that participation in school-based sports increases students' self-esteem. In this article we examine the interrelationships among participation in a school-based sport and the benefits assumed to be associated with it. Specifically, we test a model that postulates that school spirit, operationalized as attachment to school, and healthy bodies, operationalized as a sense of physical well-being, mediate the relationship between school sports and self-esteem. Data from the National Longitudinal Study of Adolescent Health on Caucasian and African American girls and boys were employed to test the model. School attachment and physical well-being absorbed the statistical effect of participating in a sport for all four gender-by-race groups. Among Caucasian girls a negative residual effect of sports participation was observed, which suggests that sports participation encapsulates multiple effects with contradictory influences. For African American girls school attachment by itself was not a significant mediator of the effect of sports participation on self-esteem. For all groups a sense of physical well-being was the more powerful mediator. 相似文献
25.
26.
27.
28.
29.
The authors examined the impact of sense of coherence on the career thought processes of a sample of college students. A. Antonovsky (1987) defined sense of coherence as the global orientation that the world is comprehensible, manageable, and meaningful. Study participants completed the Sense of Coherence Scale (A. Antonovsky, 1987) and the Career Thoughts Inventory (CTI; J. P. Sampson, G. W. Peterson, J. G. Lenz, R. C. Reardon, & D. E. Saunders, 1996). Multivariate tests indicated a medium relationship between sense of coherence and CTI Total and subscale scores; sense of coherence accounted for 14% of the variance. Univariate tests also indicated a medium relationship between sense of coherence and each subscale. 相似文献
30.
Ruffin M. Holt 《Voluntas: International Journal of Voluntary and Nonprofit Organizations》2002,13(2):200-202
VOLUNTAS: International Journal of Voluntary and Nonprofit Organizations - 相似文献