全文获取类型
收费全文 | 4550篇 |
免费 | 129篇 |
专业分类
管理学 | 679篇 |
民族学 | 26篇 |
人才学 | 1篇 |
人口学 | 463篇 |
丛书文集 | 39篇 |
教育普及 | 1篇 |
理论方法论 | 539篇 |
综合类 | 51篇 |
社会学 | 2329篇 |
统计学 | 551篇 |
出版年
2021年 | 28篇 |
2020年 | 62篇 |
2019年 | 78篇 |
2018年 | 80篇 |
2017年 | 130篇 |
2016年 | 100篇 |
2015年 | 74篇 |
2014年 | 82篇 |
2013年 | 778篇 |
2012年 | 141篇 |
2011年 | 169篇 |
2010年 | 110篇 |
2009年 | 134篇 |
2008年 | 146篇 |
2007年 | 144篇 |
2006年 | 159篇 |
2005年 | 143篇 |
2004年 | 131篇 |
2003年 | 123篇 |
2002年 | 130篇 |
2001年 | 90篇 |
2000年 | 96篇 |
1999年 | 86篇 |
1998年 | 67篇 |
1997年 | 72篇 |
1996年 | 90篇 |
1995年 | 68篇 |
1994年 | 64篇 |
1993年 | 59篇 |
1992年 | 61篇 |
1991年 | 58篇 |
1990年 | 54篇 |
1989年 | 63篇 |
1988年 | 46篇 |
1987年 | 42篇 |
1986年 | 59篇 |
1985年 | 58篇 |
1984年 | 57篇 |
1983年 | 45篇 |
1982年 | 36篇 |
1981年 | 43篇 |
1980年 | 39篇 |
1979年 | 48篇 |
1978年 | 43篇 |
1977年 | 34篇 |
1976年 | 40篇 |
1975年 | 40篇 |
1974年 | 28篇 |
1972年 | 17篇 |
1971年 | 26篇 |
排序方式: 共有4679条查询结果,搜索用时 281 毫秒
201.
202.
This department includes the two sections New Developments in Statistical Computing and Statistical Computing Software Reviews; suitable contents for each of these sections are described under the respective section heading. Articles submitted for the department, outside the two sections, should not be highly technical and should be relevant to the teaching or practice of statistical computing. An unbiased estimator of e is used to motivate a simple simulation exercise that requires only observations from the distribution uniform on (0, 1). Antithetic variables are introduced and applied to the simulation problem to give a second unbiased estimator of e with reduced variance. 相似文献
203.
Self-exclusion is a programme utilized by the gaming industry to limit access to gaming opportunities for problem gamblers. It is based on the following principles: (1) The gaming industry recognizes that a proportion of community members gamble excessively and have difficulty controlling gambling behaviours; (2) The gaming industry has a responsibility to provide a safe gaming environment and to assist in minimizing the negative impact on individuals displaying problem gambling behaviours; (3) Individuals must accept personal responsibility for limiting gambling behaviours to affordable levels; and (4) Self-exclusion is not a treatment designed to address psychological processes. The objective of the present paper is to propose a unifying structure for self-exclusion programmes as a gateway to treatment based on a system operated by independent ‘educators’ whose roles and responsibilities include informing individuals of the purpose of self-exclusion, establishing links and a gateway for access to supplementary services and monitoring and reporting the effectiveness of the overall programme. 相似文献
204.
205.
206.
207.
This article examined general trends in teacher-reported conflict and closeness among 878 children from kindergarten through sixth grade, and examined early childhood characteristics that predict differences in initial levels and growth of conflict and closeness over time. Results indicated modest stability of teacher-perceived conflict and closeness through sixth grade, with relatively greater stability in perceptions of conflict. Levels of conflict at kindergarten were higher for children who were male, Black, had greater mean hours of childcare, had lower academic achievement scores, and had greater externalizing behavior. Children identified as Black and those with less sensitive mothers were at greater risk for increased conflict with teachers over time. Levels of teacher-reported closeness were lower when children were male, had lower quality home environments, and had lower academic achievement scores. The gap in closeness ratings between males and females increased in the middle elementary school years. Additional analyses were conduced to explore differences in teacher ratings of conflict between Black and White students. 相似文献
208.
209.
210.