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   20880篇
  免费   678篇
  国内免费   1篇
管理学   2668篇
民族学   125篇
人口学   1900篇
丛书文集   82篇
教育普及   1篇
理论方法论   1937篇
综合类   193篇
社会学   10854篇
统计学   3799篇
  2023年   145篇
  2022年   92篇
  2021年   142篇
  2020年   389篇
  2019年   574篇
  2018年   681篇
  2017年   885篇
  2016年   677篇
  2015年   459篇
  2014年   630篇
  2013年   3763篇
  2012年   799篇
  2011年   755篇
  2010年   549篇
  2009年   452篇
  2008年   588篇
  2007年   555篇
  2006年   579篇
  2005年   446篇
  2004年   471篇
  2003年   385篇
  2002年   403篇
  2001年   485篇
  2000年   426篇
  1999年   412篇
  1998年   321篇
  1997年   268篇
  1996年   286篇
  1995年   293篇
  1994年   248篇
  1993年   257篇
  1992年   303篇
  1991年   299篇
  1990年   292篇
  1989年   259篇
  1988年   243篇
  1987年   208篇
  1986年   235篇
  1985年   254篇
  1984年   223篇
  1983年   196篇
  1982年   159篇
  1981年   133篇
  1980年   157篇
  1979年   170篇
  1978年   134篇
  1977年   115篇
  1976年   87篇
  1975年   92篇
  1974年   93篇
排序方式: 共有10000条查询结果,搜索用时 671 毫秒
171.
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   
172.
Despite the importance of research on repression to the study of social movements, few researchers have focused on developing a refined and powerful conceptualization of repression. To address the difficulties such theoretical inattention produces, three key dimensions of repression are outlined and crossed to produce a repression typology. The merit of this typology for researchers is shown by using the typology to: (1) reorganize major research findings on repression; (2) diagnose theoretical and empirical oversights and missteps in the study of repression; and (3) develop new hypotheses about explanatory factors related to repression and relationships between different forms of repression. Such a typology represents an important step toward creating richer theoretical explanations of repression.  相似文献   
173.
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   
174.
The moderating role of maternal characteristics and maternal sensitivity on the concordance between maternal reports and laboratory observations of negative emotionality was examined. Participants were 90 primiparous mothers and their infants. Mothers completed questionnaires about remembered care from their own parents and their depressive symptoms prenatally, infant temperament (distress to novelty and distress to limitations), and depressive symptoms postnatally. Mothers and infants participated in a laboratory assessment of infant temperament (distress to novelty and limitations) and maternal sensitivity at 6 months postpartum. Several factors that moderate the degree of concordance between maternal reports and behavioral observations were identified, as predicted. Novelty concordance was higher when mothers reported having their emotional needs met in childhood and low prenatal depressive symptoms. Limitations concordance was higher when mothers were less sensitive during the observational tasks. Methodological and theoretical implications are discussed.  相似文献   
175.
176.
This paper is concerned with joint tests of non-nested models and simultaneous departures from homoskedasticity, serial independence and normality of the disturbance terms. Locally equivalent alternative models are used to construct joint tests since they provide a convenient way to incorporate more than one type of departure from the classical conditions. The joint tests represent a simple asymptotic solution to the “pre-testing” problem in the context of non-nested linear regression models. Our simulation results indicate that the proposed tests have good finite sample properties.  相似文献   
177.
Fertility and Employment   总被引:3,自引:0,他引:3  
  相似文献   
178.
1. Research shows that many emergency workers are affected physically and emotionally by critical incident stress. 2. Debriefings conducted by trained team members are an effective method to mitigate the impact of critical incident stress. A debriefing is a structured, time-limited group intervention. 3. Cooperation among community agencies is essential for the development and effective functioning of a critical incident stress debriefing team. 4. Several teams in Illinois have organized to form a Critical Incident Stress Debriefing Network. The Illinois network is part of an international organization composed of critical incident stress debriefing providers.  相似文献   
179.
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   
180.
We tested a mathematical model of psychological well-being (PWB) with data from a paradigm that included a negative mood induction followed by a positive induction. The propositions from the model encompass the hypothesis that the relative mood prior to either induction has implications for the magnitude of subsequent induction effects, such that relative mood is defined by current mood as a ratio of the prevailing mood that is predicted by the model. The findings confirm the hypothesis that the relative mood at baseline predicts mood change in a nonoverlapping time period, even after control for potentially mediating variables.  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