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   7910篇
  免费   64篇
  国内免费   2篇
管理学   1252篇
民族学   23篇
人口学   683篇
丛书文集   21篇
理论方法论   677篇
综合类   91篇
社会学   3927篇
统计学   1302篇
  2020年   108篇
  2019年   134篇
  2018年   141篇
  2017年   166篇
  2016年   153篇
  2015年   106篇
  2014年   156篇
  2013年   1307篇
  2012年   177篇
  2011年   197篇
  2010年   152篇
  2009年   145篇
  2008年   184篇
  2007年   177篇
  2006年   193篇
  2005年   181篇
  2004年   153篇
  2003年   126篇
  2002年   147篇
  2001年   155篇
  2000年   174篇
  1999年   142篇
  1998年   137篇
  1997年   121篇
  1996年   127篇
  1995年   130篇
  1994年   139篇
  1993年   130篇
  1992年   141篇
  1991年   155篇
  1990年   172篇
  1989年   143篇
  1988年   157篇
  1987年   136篇
  1986年   132篇
  1985年   133篇
  1984年   143篇
  1983年   132篇
  1982年   97篇
  1981年   80篇
  1980年   87篇
  1979年   113篇
  1978年   89篇
  1977年   69篇
  1976年   81篇
  1975年   52篇
  1974年   75篇
  1973年   52篇
  1971年   43篇
  1970年   44篇
排序方式: 共有7976条查询结果,搜索用时 15 毫秒
981.
Asthma patients' health status may be especially sensitive to some types of air pollution, but the evidence on this is mixed. We explore the effects of ground-level ozone on asthma patient's activities, breaking apart the usual aggregated category of leisure into indoor and outdoor activities, and differentiating those by whether the activities were active or inactive. Applying the semiparametric censored estimation method we demonstrate that even though the period over which activities were observed was relatively low in ozone levels, there is a significant impact of ozone on a few activities. The (non-ozone) economic and demographic variables in the model play significant roles in explaining the allocation of time among seven activities, suggesting the suitability of the approach for other household decision-making contexts.  相似文献   
982.
Book reviews     
Dobbin  Frank  Pollard  Tom  Luke  Timothy W. 《Theory and Society》2004,33(1):117-129
Theory and Society -  相似文献   
983.
Drawing on interviews with more than 80 scientists on two university campuses, we create a typology that offers insights into how transformations in the nature and locus of life science innovation influence academic careers and work practices. Our analyses suggest that a strong outcome of increased academic concern with research commercialization is the appearance of new fault lines among faculty, between faculty and students, and even between scientists' interests and those of their institutions. We argue that life science commercialization is driven by a mix of new funding opportunities, changing institutional mandates for universities, and novel research technologies that bring basic research and product development into much closer contact. The rise of patenting and commercially motivated technology transfer on U.S. campuses is altering faculty work practices and relationships, while transforming the criteria by which success is determined and rewards are allocated. Through close analysis of interviews with four researchers who typify a range of academic responses to commercialism, we demonstrate emerging patterns of conflict and agreement in faculty responses to commercial opportunities in the life sciences.  相似文献   
984.
Participation in organized out-of-school activities leads to long-term psychosocial and educational benefits for young people. Now we're learning which features of these activities best support individual children.  相似文献   
985.
To understand how oxidative stress contributes to aging and age-related diseases and to better evaluate the therapeutic effect of antioxidant drugs, it would be highly desirable to have a comprehensive and detailed readout of the types of oxidative damage that occur to proteins at a global or proteome level. In this Perspective, I examine how proteomics, defined here as the science of examining all proteins in an organelle, cell, or tissue in the context of biological phenomena, can be used to provide molecular details of mitochondrial protein oxidative damage. Specifically, I discuss approaches that combine knowledge of the mitochondrial proteome with newer mass spectrometry-based techniques that are capable of identifying proteins and sites of oxidative modification in a high-throughput manner.  相似文献   
986.
987.
Conclusions In the twenty years since the publication of What Do Unions Do?, employee benefits and contingent forms of non-wage compensation have increased in importance and scope in human resources and industrial relations practice and policy. Nevertheless, Freeman and Medoff’s (1984) seminal work, and the associated research in Freeman (1981, 1985), has stood the test of time. The theoretical and empirical agenda for research on unions and non-wage forms of compensation established in those works continues to be the leading framework for conceptualizing and analyzing this important issue.  相似文献   
988.
989.
All family members interviewed suffered from chronic posttraumatic stress disorder 5 or more years after an infant kidnapping. Psychiatric nurses should routinely assess for secondary victimization related to any type of traumatic stressor. Nurses should refer parents and families to materials available from the National Center for Missing and Exploited Children (NCMEC) (http://www.missingkids.com/).  相似文献   
990.
In evaluating family preservation services, it is important not only to study the service outcomes and the family characteristics, but also what actually happens during the treatment. This requires a program model. This article describes how a program model works, prescribes how workers should carry it out, and describes how researchers should measure the program's characteristics. The authors use data from Families First in The Netherlands to test the model. Results show that the method of the program meets the specified characteristics. The results are important for treatment, policy, education, and evaluation research.  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