全文获取类型
收费全文 | 20673篇 |
免费 | 361篇 |
国内免费 | 1篇 |
专业分类
管理学 | 2943篇 |
民族学 | 85篇 |
人才学 | 1篇 |
人口学 | 2041篇 |
丛书文集 | 81篇 |
教育普及 | 2篇 |
理论方法论 | 1824篇 |
现状及发展 | 1篇 |
综合类 | 277篇 |
社会学 | 9934篇 |
统计学 | 3846篇 |
出版年
2021年 | 121篇 |
2020年 | 302篇 |
2019年 | 418篇 |
2018年 | 499篇 |
2017年 | 673篇 |
2016年 | 543篇 |
2015年 | 384篇 |
2014年 | 501篇 |
2013年 | 3266篇 |
2012年 | 667篇 |
2011年 | 647篇 |
2010年 | 475篇 |
2009年 | 390篇 |
2008年 | 472篇 |
2007年 | 497篇 |
2006年 | 471篇 |
2005年 | 461篇 |
2004年 | 428篇 |
2003年 | 389篇 |
2002年 | 441篇 |
2001年 | 550篇 |
2000年 | 552篇 |
1999年 | 483篇 |
1998年 | 358篇 |
1997年 | 324篇 |
1996年 | 330篇 |
1995年 | 316篇 |
1994年 | 298篇 |
1993年 | 302篇 |
1992年 | 363篇 |
1991年 | 339篇 |
1990年 | 294篇 |
1989年 | 302篇 |
1988年 | 310篇 |
1987年 | 266篇 |
1986年 | 257篇 |
1985年 | 290篇 |
1984年 | 273篇 |
1983年 | 263篇 |
1982年 | 225篇 |
1981年 | 194篇 |
1980年 | 173篇 |
1979年 | 205篇 |
1978年 | 195篇 |
1977年 | 171篇 |
1976年 | 145篇 |
1975年 | 171篇 |
1974年 | 125篇 |
1973年 | 121篇 |
1971年 | 99篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
101.
102.
Few researchers have examined organizational variation in the adoption of workplace drug testing, but innovation theory suggests that adoption is more likely when it is compatible with an organization's values, previously introduced ideas, and needs. Using data from the 1997 National Employee Survey, this research models the effects of organizational compatibility, industry, and establishment size on the adoption of drug testing. The data reveal that compatibility, as measured by an organization's rules orientation, presence of an employee assistance program, and mechanization, is associated with the adoption of drug testing. As predicted, the adoption of drug testing varies across industries and by establishment size. 相似文献
103.
104.
105.
Ricardo Maronna Matthias Fischer Jürgen Groß Andreas Karlsson 《Statistical Papers》2007,48(1):163-170
106.
FINNEY DJ 《Journal of the American Statistical Association》1948,43(244):566-571
107.
108.
Over the first years of life, infants gradually develop the ability to retrieve their memories across cue and contextual changes. Whereas maturational factors drive some of these developments in memory ability, experiences occurring within the learning event may also impact infants' ability to retrieve memories in new situations. In 2 experiments we examined whether it was possible to facilitate 12‐month‐old infants' generalization of learning in the deferred imitation paradigm by varying experiences before or during the demonstration session, or during the retention interval. In Experiment 1, altering the length, timing, or variability of training had no impact on generalization; infants showed a low, but consistent level of memory retrieval. In Experiment 2, infants who experienced a unique context for encoding and retrieval exhibited generalization; infants who experienced the context prior to the demonstration session, or during the retention interval, did not. Specificity is a robust feature of infant memory and is not substantially altered by encoding experiences in an observational learning paradigm. Previous history with a learning environment can, however, impact the flexibility of memory retrieval. 相似文献
109.
In this paper, we deal with a discrete-time multiserver retrial queue with finite population. Firstly, we study the Markov chain at the epochs immediately after slot boundaries making emphasis on the computation of its steady-state distribution. Then, the main performance measures are investigated. Besides, we simulate the waiting time of a customer in the retrial group under three different queueing policies. Some numerical examples are given to illustrate the analysis. 相似文献
110.
Paul J. E. Miller John P. Caughlin Ted L. Huston 《Journal of marriage and the family》2003,65(4):978-995
This study examined the processes that underlie the association between trait expressiveness and marital satisfaction. A total of 168 newlywed couples participated in a four‐wave, 13‐year longitudinal study of marriage. Cross‐sectional and longitudinal path analyses suggested that expressiveness promotes satisfaction by leading spouses to engage in affectionate behavior and by leading them to idealize their partner. Expressive people formed idealized images of their partner because they brought out the best in their partner's behavior and because they interpreted their partner's behavior in a favorable light. The study extends previous research by showing that the benefits of trait expressiveness extend into the second decade of marriage and by providing a plausible explanation of the connections between trait expressiveness and marital satisfaction. 相似文献