全文获取类型
收费全文 | 14961篇 |
免费 | 388篇 |
国内免费 | 1篇 |
专业分类
管理学 | 2099篇 |
民族学 | 65篇 |
人才学 | 1篇 |
人口学 | 1446篇 |
丛书文集 | 63篇 |
理论方法论 | 1346篇 |
综合类 | 370篇 |
社会学 | 6816篇 |
统计学 | 3144篇 |
出版年
2023年 | 79篇 |
2021年 | 86篇 |
2020年 | 191篇 |
2019年 | 273篇 |
2018年 | 338篇 |
2017年 | 491篇 |
2016年 | 378篇 |
2015年 | 279篇 |
2014年 | 334篇 |
2013年 | 2600篇 |
2012年 | 499篇 |
2011年 | 418篇 |
2010年 | 312篇 |
2009年 | 290篇 |
2008年 | 340篇 |
2007年 | 321篇 |
2006年 | 310篇 |
2005年 | 341篇 |
2004年 | 319篇 |
2003年 | 347篇 |
2002年 | 378篇 |
2001年 | 369篇 |
2000年 | 350篇 |
1999年 | 343篇 |
1998年 | 279篇 |
1997年 | 245篇 |
1996年 | 243篇 |
1995年 | 210篇 |
1994年 | 200篇 |
1993年 | 214篇 |
1992年 | 236篇 |
1991年 | 240篇 |
1990年 | 230篇 |
1989年 | 236篇 |
1988年 | 189篇 |
1987年 | 215篇 |
1986年 | 191篇 |
1985年 | 230篇 |
1984年 | 188篇 |
1983年 | 203篇 |
1982年 | 154篇 |
1981年 | 153篇 |
1980年 | 145篇 |
1979年 | 154篇 |
1978年 | 162篇 |
1977年 | 113篇 |
1976年 | 109篇 |
1975年 | 117篇 |
1974年 | 107篇 |
1973年 | 88篇 |
排序方式: 共有10000条查询结果,搜索用时 203 毫秒
111.
112.
Jason P. Fine David V. Glidden Kristine E. Lee 《Journal of the Royal Statistical Society. Series B, Statistical methodology》2003,65(1):317-329
Summary. We propose a simple estimation procedure for a proportional hazards frailty regression model for clustered survival data in which the dependence is generated by a positive stable distribution. Inferences for the frailty parameter can be obtained by using output from Cox regression analyses. The computational burden is substantially less than that of the other approaches to estimation. The large sample behaviour of the estimator is studied and simulations show that the approximations are appropriate for use with realistic sample sizes. The methods are motivated by studies of familial associations in the natural history of diseases. Their practical utility is illustrated with sib pair data from Beaver Dam, Wisconsin. 相似文献
113.
114.
The ability to infer parameters of gene regulatory networks is emerging as a key problem in systems biology. The biochemical
data are intrinsically stochastic and tend to be observed by means of discrete-time sampling systems, which are often limited
in their completeness. In this paper we explore how to make Bayesian inference for the kinetic rate constants of regulatory
networks, using the stochastic kinetic Lotka-Volterra system as a model. This simple model describes behaviour typical of
many biochemical networks which exhibit auto-regulatory behaviour. Various MCMC algorithms are described and their performance
evaluated in several data-poor scenarios. An algorithm based on an approximating process is shown to be particularly efficient. 相似文献
115.
The authors provide an overview of optimal scaling results for the Metropolis algorithm with Gaussian proposal distribution. They address in more depth the case of high‐dimensional target distributions formed of independent, but not identically distributed components. They attempt to give an intuitive explanation as to why the well‐known optimal acceptance rate of 0.234 is not always suitable. They show how to find the asymptotically optimal acceptance rate when needed, and they explain why it is sometimes necessary to turn to inhomogeneous proposal distributions. Their results are illustrated with a simple example. 相似文献
116.
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
117.
This study examines the relationships among personal coping resources, social support, external coping resources, job stressors and job strains in a sample of 110 American Telephone and Telegraph employees undergoing a major organizational restructuring. The study expanded on a model suggested by Ashford (1988) by defining another category of coping resources that employees may draw upon to deal with the stressors and strains which occur during major organizational changes. External coping resources were defined as those which provided employees with a sense of 'vicarious control' in stressful situations. Results indicated that personal coping resources, social support and external coping resources had a direct effect upon job stressor and strain levels. No 'buffering' effect of these coplng resources was found. Hierarchical regression analyses indicated that external coping resources added to the prediction of job stressors and strains even when pertonal coping resources and social support were entered first into the prediction questions. 相似文献
118.
Mark J. Miller Nancy P. Newell Thomas P. Springer Don Wells 《The Career development quarterly》1992,40(4):334-339
The Self-Directed Search was administered to 68 university seniors who were majoring in Chemistry/Chemical Engineering, Elementary Education, and Office Administration. Their resulting three-letter summary codes were compared with three-letter college major codes obtained from the College Majors Finder. A high degree of agreement between the two sets of codes was found for each of the three majors. Effective methods for matching people to jobs have held the interest and occupied much time for career counselors and vocational theorists since the inception of the trait-factor approach to career counseling. More recently, Holland (1985a) broadened and clarified matching procedures through the development of his typological theory of vocational choice. Just as personality types and occupational environments have been organized using Holland's framework to foster an understanding of occupational choice, Holland's theory can also be used to explain other types of choices, such as choice of a college major. 相似文献
119.
THE SOLUTION-ORIENTED GENOGRAM: A COLLABORATIVE APPROACH 总被引:1,自引:0,他引:1
Bruce P. Kuehl 《Journal of marital and family therapy》1995,21(3):239-250
Developed primarily by Bowenian intergenerational therapists, genograms have evolved into largely atheoretical tools used by many therapists. Given that constructivist-based therapies have become the most popular genre of contemporary family therapies (Sprenkle & Piercy, 1992), the author examines how genograms can be used to augment a solution-oriented approach. Specific interventions, case examples, and potential problems associated with such an approach are discussed, along with potential implications for family-of-origin work. 相似文献
120.
V.P. Kultygin 《International Journal of Social Welfare》1993,2(3):142-149
The article describes the socioeconomic situation of the Russian population and its dynamics in 1992. The analysis is based on series of regional sociological surveys led by the All-Russian Living Standards Research Center and on official Russian statistical data. The basic unit of analysis is the family, and hence family typology approbated both in research and in practical social work is introduced. Besides describing and discussing the growing poverty tendencies in contemporary Russia, the article also contains methodological recommendations for social policy bodies and social workers on the strategy of work in social maintenance and social support of the least secure population strata. 相似文献