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   4033篇
  免费   100篇
管理学   539篇
民族学   26篇
人才学   1篇
人口学   380篇
丛书文集   23篇
理论方法论   490篇
综合类   76篇
社会学   1824篇
统计学   774篇
  2023年   35篇
  2022年   22篇
  2021年   49篇
  2020年   97篇
  2019年   139篇
  2018年   135篇
  2017年   176篇
  2016年   150篇
  2015年   110篇
  2014年   121篇
  2013年   661篇
  2012年   181篇
  2011年   156篇
  2010年   124篇
  2009年   116篇
  2008年   104篇
  2007年   111篇
  2006年   105篇
  2005年   77篇
  2004年   92篇
  2003年   77篇
  2002年   70篇
  2001年   66篇
  2000年   73篇
  1999年   86篇
  1998年   68篇
  1997年   55篇
  1996年   45篇
  1995年   55篇
  1994年   63篇
  1993年   51篇
  1992年   54篇
  1991年   40篇
  1990年   38篇
  1989年   31篇
  1988年   37篇
  1987年   37篇
  1986年   31篇
  1985年   41篇
  1984年   40篇
  1983年   31篇
  1982年   29篇
  1981年   24篇
  1980年   27篇
  1979年   25篇
  1978年   22篇
  1977年   18篇
  1976年   22篇
  1974年   16篇
  1973年   16篇
排序方式: 共有4133条查询结果,搜索用时 0 毫秒
351.
Marital relationships, like individuals, follow a developmental trajectory over time with ups and downs and gains and losses. We work from a life course perspective and use growth curve analysis to look at trajectories of change in marital quality over time. Although the tendency is for marital quality to decline over time, some groups begin with much higher levels of marital quality than others. Moreover, a number of life course and contextual factors can accelerate or slow this path of change. Our findings point to the importance of considering the multi-dimensionality of time (e.g., age, marital duration, the passage of years) as well as family transitions (e.g., having children, emptying or refilling the nest) in creating the meanings and experiences of marriage over time.  相似文献   
352.
Summary.  Suppose that we have m repeated measures on each subject, and we model the observation vectors with a finite mixture model.  We further assume that the repeated measures are conditionally independent. We present methods to estimate the shape of the component distributions along with various features of the component distributions such as the medians, means and variances. We make no distributional assumptions on the components; indeed, we allow different shapes for different components.  相似文献   
353.
Despite recent immigration from Africa and the Caribbean, Blacks in America are still viewed as a monolith in many previous studies. In this paper, we use newly released 2000 census data to estimate log‐linear models that highlight patterns of interracial and intraracial marriage and cohabitation among African Americans, West Indians, Africans, and Puerto Rican non‐Whites, and their interracial marriage and cohabitation with Whites. Based on data from several metropolitan areas, our results show that, despite lower socioeconomic status, native‐born African Americans are more likely than other Blacks to marry Whites; they also are more likely to marry other Black ethnics. West Indians, Africans, and Puerto Rican non‐Whites are more likely to marry African Americans than to marry Whites. Interracial relationships represent a greater share of cohabiting unions than marital unions. The majority of interracial unions, including native and immigrant Blacks, consist of a Black man and White woman. The implications for marital assimilation are discussed.  相似文献   
354.
Critically important to Neil Smelser's theory of collective behavior is the idea that people join radical social movements because they experience strain. A social movement arises to reassure participants that something is being done to redress the underlying source of strain. Militia presence and activity on the Internet (especially Usenet) is a phenomenon that can be studied within Smelser's framework. Militia watchers contend that those who join the militias have experienced the kinds of strain to which Smelser refers. The purpose of this article is to analyze the content of Internet traffic of U.S. militias in order to test the thesis outlined above. It uses militia Web sites and militia messages posted to Usenet (N = 1,196) as primary data to test Smelser's theory. Information was gathered on 171 men and women from 28 U.S. militias who posted messages to Usenet from 1998–2001. Based on the militiamen/women studied, Smelser's thesis is generally confirmed. Most experienced some form of social stress or strain prior to or during the time that they were in the militia, and most conditions for social movement development as specified by Smelser were met and confirmed by the data.  相似文献   
355.
The impact of gender on gambling attitudes and behavior   总被引:3,自引:0,他引:3  
Researchers have often attributed the consistent relation of gender and gambling behavior to gender role socialization. If they are correct, gender should affect different sets of gambling attitudes in a manner consistent with at least three aspects of gender role socialization: a double standard of morality, a guardian of the hearth role for women, and a dualism of orientations. A survey measuring gambling attitudes and behavior was sent to a sample of residents in North Dakota after legalization of several games of chance (e.g., blackjack). Gender affects behavior but only some of the specified attitudes. These mixed results may reflect changes in gender role socialization and the increasing legalization of gambling.  相似文献   
356.
Dans un article précédent nous avons présenté les résultats d'une expérience concue pour mettre à l'épreuve certaines prédictions d'une théorie formelle de la relation interpersonnelle en ce qui à trait a l'émergence des anticipations de conduite lorsque plusieurs sources d'évaluation de cette conduite anticipee sont disponibles a un individu, Dans cet article nous formulons deux alternatives additionnelles qui sont théoriquement plausibles, les multiples prédictions em-piriques qu'elles engendrent, et une évaluation de ces trois formulations particu-lières à la lumière des données existantes. De ces trois formulations, seule la première est appuyee par nos donnees empiriques. Voici de quelle manière elle s'exprime: mis en présence de plusieurs sources d'évaluation l'individu intègre l'ensemble des éléments de l'évaluation plutot que de (a) choisir seu-lement la meilleure source disponible, ou (b) d'utiliser la source la moins bonne comme une ?source négative?, ou encore de se servir de l'évaluation de celui dont l'exactitude ne peut etre mise en doute. In an earlier paper we reported the results of an experiment designed to test certain predictions of a formal theory of interpersonal behaviour concerning the formation of performance expectations when multiple sources of performance evaluation were available to an individual. In this paper we present two additional theoretically reasonable alternative formulations, the different empirical predictions derivable from them, and an evaluation of the three formulations in the light of the existing data. Of the three, only the original formulation received clear empirical support. This formulation holds that when faced with multiple sources of evaluation, the individual combines the evaluations received, rather than (a) selecting only the best source available, or (b) using the lower source as a “negative source,” or someone whose evaluation is so likely to be incorrect as to provide an accurate measure of the correct evaluation.  相似文献   
357.
Category Distinguishability and Observer Agreement   总被引:1,自引:0,他引:1  
It is common in the medical, biological, and social sciences for the categories into which an object is classified not to have a fully objective definition. Theoretically speaking the categories are therefore not completely distinguishable. The practical extent of their distinguishability can be measured when two expert observers classify the same sample of objects. It is shown, under reasonable assumptions, that the matrix of joint classification probabilities is quasi-symmetric, and that the symmetric matrix component is non-negative definite. The degree of distinguishability between two categories is defined and is used to give a measure of overall category distinguishability. It is argued that the kappa measure of observer agreement is unsatisfactory as a measure of overall category distinguishability.  相似文献   
358.
359.
Foster children represent a high-risk group for physical, emotional, and social health problems, yet few federal or state policies explicitly address foster child health. This article reviews foster child health and the legal background for policy, then discusses components of a comprehensive health care supervision program.  相似文献   
360.
Use of a suitable stopping rule yields exact uniformly most powerful tests and minimum variance unbiased estimators of various parameters of a Markov branching model with or without immigration. The population model discussed includes the pure birth, simple epidemic, immigration-death, M/M/ 1 queue, linear birth-death and a branching diffusion process, among others, as special cases.  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