首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   92343篇
  免费   2943篇
  国内免费   4篇
管理学   12673篇
民族学   543篇
人才学   25篇
人口学   7324篇
丛书文集   531篇
教育普及   2篇
理论方法论   9505篇
现状及发展   1篇
综合类   2176篇
社会学   43541篇
统计学   18969篇
  2023年   505篇
  2021年   570篇
  2020年   1514篇
  2019年   2207篇
  2018年   2125篇
  2017年   3201篇
  2016年   2415篇
  2015年   2064篇
  2014年   2641篇
  2013年   18887篇
  2012年   2456篇
  2011年   2279篇
  2010年   2006篇
  2009年   2202篇
  2008年   2072篇
  2007年   1894篇
  2006年   2137篇
  2005年   2326篇
  2004年   2196篇
  2003年   1929篇
  2002年   2025篇
  2001年   2101篇
  2000年   1893篇
  1999年   1763篇
  1998年   1528篇
  1997年   1398篇
  1996年   1357篇
  1995年   1363篇
  1994年   1335篇
  1993年   1335篇
  1992年   1336篇
  1991年   1270篇
  1990年   1239篇
  1989年   1092篇
  1988年   1182篇
  1987年   1043篇
  1986年   954篇
  1985年   1118篇
  1984年   1185篇
  1983年   1065篇
  1982年   979篇
  1981年   882篇
  1980年   827篇
  1979年   906篇
  1978年   794篇
  1977年   716篇
  1976年   667篇
  1975年   652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
941.
Childhood parental loss and adult depression   总被引:2,自引:0,他引:2  
Previous research demonstrates convincingly that childhood parental deaths and parental divorces have implications for adult well-being as defined by levels of depression, educational attainment, early age at marriage, and risk of divorce. What this research has failed to examine are the interconnections among these outcomes. Specifically, are the socioeconomic and marital outcomes of parental loss implicated in the observed higher levels of depression? This analysis takes a first step in answering this question. Using data from a sample of 1,755 married men and women, I estimated regression models which examine the extent to which adult socioeconomic status and current marital quality mediate and/or modify the loss-depression relationship. Parental divorce was strongly related to socioeconomic and marital outcomes. Furthermore, current marital quality contributed importantly to understanding the higher levels of depressed mood observed among persons from divorced homes. Parental death was much more weakly related to socioeconomic and marital outcomes, and these outcomes played little role in explaining its relationship to depression. Finally, all of these relationships were stronger among women than men. These findings support the utility of life-course approaches to understanding adult mental health.  相似文献   
942.
943.
Native American drinking: a neglected subject of study and research   总被引:1,自引:0,他引:1  
Although Native Americans are plagued by high rates of alcoholism, violence, suicide and early death, these social and clinical problems are usually given little more than cursory treatment in textbooks. A content analysis of twenty-six textbooks on alcoholism and substance misuse revealed that only four provided a detailed discussion of Native American drinking. Greater attention needs to be given to the cultural, psychological, and biological issues of drinking and drunkenness among this special population.  相似文献   
944.
Abstract Rural women have difficulty finding good jobs. Ownership of small businesses offers an alternative but the sales and income of women-owned firms are significantly lower than those of men-owned firms. Compared with men, women owners are more likely to operate smaller and newer businesses; however, these differences do not completely account for the gap in gross sales between men- and women-owned businesses. The strongest influences on business success are firm size, corporate status, and industrial sector. Though significant, the owner's gender is less important than these organizational characteristics. The factors influencing success of small businesses generally are the same for men- and women-owned businesses. More research on business networks and the start-up phase of small businesses is necessary for a better understanding of the sources of gender differences in success.  相似文献   
945.
This paper describes specific transference and counter-transference issues that commonly emerge in therapeutic work with adolescents and parents who are in the midst of family transitions such as divorce and remarriage. Psychoanalytic understanding and definitions of transference and countertransference are applied to short-term family-centered cases in which the parent-adolescent relationship is at particular risk. Case vignettes are presented in order to illustrate how transference and countertransference may guide or interfere with clinical interventions that are especially indicated with adolescents whose family structure has changed. Such interventions as well as the use of consultation are briefly described.At the time this paper was prepared, Ms. Springer was Associate Director and a senior clinician at the Center for the Family in Transition in Corte Madera, California. Funds for the research and clinical work that provided the basis for this paper were supplied by grants from the San Francisco Foudation. An earlier version of this paper was presented at the 66th Annual Meeting of the American Orthopsychiatry Association, New York City, March 31–April 4, 1989.  相似文献   
946.
947.
This study explored how students choose careers, their attitudes toward vocational education, and whether or not they would consider enrolling in a nontraditional vocational education program.  相似文献   
948.
大众消费心理与网络营销   总被引:3,自引:0,他引:3  
从消费个性化、消费行为及价格因素等方面分析了当代大众消费者的心理变化趋势 ,探讨了网络营销企业在满足消费者个性化需求等方面存在的心理优势及消费者、引导消费自信等方面存在的心理不足。认为网络营销时代即将到来 ,但企业和消费者还应对网络营销进行权衡利弊 ,做出正确的选择。  相似文献   
949.
950.
The EM algorithm is a popular method for maximizing a likelihood in the presence of incomplete data. When the likelihood has multiple local maxima, the parameter space can be partitioned into domains of convergence, one for each local maximum. In this paper we investigate these domains for the location family generated by the t-distribution. We show that, perhaps somewhat surprisingly, these domains need not be connected sets. As an extreme case we give an example of a domain which consists of an infinite union of disjoint open intervals. Thus the convergence behaviour of the EM algorithm can be quite sensitive to the starting point.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号