全文获取类型
收费全文 | 37230篇 |
免费 | 891篇 |
国内免费 | 1篇 |
专业分类
管理学 | 4767篇 |
民族学 | 208篇 |
人才学 | 7篇 |
人口学 | 3990篇 |
丛书文集 | 178篇 |
教育普及 | 3篇 |
理论方法论 | 3309篇 |
现状及发展 | 2篇 |
综合类 | 523篇 |
社会学 | 18288篇 |
统计学 | 6847篇 |
出版年
2023年 | 157篇 |
2021年 | 191篇 |
2020年 | 510篇 |
2019年 | 766篇 |
2018年 | 1190篇 |
2017年 | 1489篇 |
2016年 | 1113篇 |
2015年 | 664篇 |
2014年 | 830篇 |
2013年 | 5654篇 |
2012年 | 1240篇 |
2011年 | 1426篇 |
2010年 | 1096篇 |
2009年 | 978篇 |
2008年 | 1086篇 |
2007年 | 1183篇 |
2006年 | 836篇 |
2005年 | 849篇 |
2004年 | 833篇 |
2003年 | 765篇 |
2002年 | 759篇 |
2001年 | 896篇 |
2000年 | 836篇 |
1999年 | 767篇 |
1998年 | 589篇 |
1997年 | 544篇 |
1996年 | 560篇 |
1995年 | 528篇 |
1994年 | 502篇 |
1993年 | 497篇 |
1992年 | 578篇 |
1991年 | 560篇 |
1990年 | 495篇 |
1989年 | 506篇 |
1988年 | 496篇 |
1987年 | 440篇 |
1986年 | 426篇 |
1985年 | 477篇 |
1984年 | 474篇 |
1983年 | 447篇 |
1982年 | 367篇 |
1981年 | 314篇 |
1980年 | 312篇 |
1979年 | 337篇 |
1978年 | 296篇 |
1977年 | 276篇 |
1976年 | 243篇 |
1975年 | 258篇 |
1974年 | 200篇 |
1973年 | 178篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
31.
From the inception of the proportional representation movement it has been an issue whether larger parties are favored at
the expense of smaller parties in one apportionment of seats as compared to another apportionment. A number of methods have
been proposed and are used in countries with a proportional representation system. These apportionment methods exhibit a regularity
of order, as discussed in the present paper, that captures the preferential treatment of larger versus smaller parties. This
order, namely majorization, permits the comparison of seat allocations in two apportionments. For divisor methods, we show
that one method is majorized by another method if and only if their signpost ratios are increasing. This criterion is satisfied
for the divisor methods with power-mean rounding, and for the divisor methods with stationary rounding. Majorization places
the five traditional apportionment methods in the order as they are known to favor larger parties over smaller parties: Adams,
Dean, Hill, Webster, and Jefferson.
Received: 5 August 2000/Accepted: 24 October 2001 相似文献
32.
The authors maintain that the social learning theory of career development and counseling has not been applied to diverse populations. To address this gap in the literature, the authors conducted a qualitative analysis of interviews with 21 middle school students in a low‐income, culturally diverse, inner‐city public school. Four themes emerged, reflecting the influence of discrimination on participants' career learning: contextual barriers and resources for learning, and psychological barriers and resources for learning. The authors provide a conceptual framework for assessing resources and barriers and a rationale for why these aspects often remain hidden or unexamined in career assessment with clients who are vulnerable to discrimination. 相似文献
33.
Ackerly Brooke A. 《Voluntas: International Journal of Voluntary and Nonprofit Organizations》2002,13(3):322-324
VOLUNTAS: International Journal of Voluntary and Nonprofit Organizations - 相似文献
34.
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
35.
36.
What do voters really know about party platforms and how do they perceive the contents? Are there any relationships between party election platforms and electoral behavior? Despite of much research on parties, there are hardly any answers to these questions. If political parties devise programmes in order to influence political attitudes or electoral behavior, it will be necessary that these programmes are read by people. But it seems to be unclear if and how people do so. This article shows clearly that voters don’t know much about party manifestoes. Still, programmes are more important for voters than many people believe. Programmes are also an important factor for electoral behavior. But there is still a lack of data to get evident results. 相似文献
37.
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
38.
39.
Concurrent and longitudinal associations between peer crowd affiliation and internalized distress were examined in a sample of 246 youth (148 girls, 98 boys). Children completed measures of depression, social anxiety, loneliness, and self‐esteem when they were in grades 4 to 6 (Time 1), and again 6 years later during adolescence (grades 10 – 12; Time 2). At Time 2, adolescents also reported their self‐concept and their identification with reputation‐based peer crowds, including Populars, Jocks, Brains, Burnouts, Non‐Conformists, and None/Average crowds. Results indicated that adolescents' report of peer crowd affiliation was concurrently associated with self‐concept and levels of internalizing distress. Follow‐back analyses of internalizing trajectories revealed that Populars/Jocks had experienced significant declines in internalizing distress across development, whereas Brains exhibited some increases in internalizing distress between childhood and adolescence. 相似文献
40.
The hypothesis that irritability and contingency detection are negatively correlated was examined in thirty‐one 6‐month‐old infants. Observation and maternal report‐based assessments of irritability were correlated with both a criterion score and a continuous score of contingency detection. Results indicated that greater irritability in infants was associated with lower contingency detection scores. Discussion focuses on identifying processes by which the 2 constructs may be associated. 相似文献