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   8798篇
  免费   232篇
  国内免费   1篇
管理学   1181篇
民族学   46篇
人才学   1篇
人口学   772篇
丛书文集   35篇
教育普及   1篇
理论方法论   800篇
综合类   137篇
社会学   4065篇
统计学   1993篇
  2023年   55篇
  2020年   135篇
  2019年   197篇
  2018年   187篇
  2017年   292篇
  2016年   202篇
  2015年   177篇
  2014年   201篇
  2013年   1633篇
  2012年   275篇
  2011年   235篇
  2010年   210篇
  2009年   189篇
  2008年   252篇
  2007年   248篇
  2006年   206篇
  2005年   181篇
  2004年   159篇
  2003年   144篇
  2002年   164篇
  2001年   199篇
  2000年   171篇
  1999年   160篇
  1998年   139篇
  1997年   139篇
  1996年   136篇
  1995年   113篇
  1994年   96篇
  1993年   129篇
  1992年   143篇
  1991年   121篇
  1990年   133篇
  1989年   112篇
  1988年   110篇
  1987年   114篇
  1986年   101篇
  1985年   87篇
  1984年   119篇
  1983年   100篇
  1982年   96篇
  1981年   70篇
  1980年   100篇
  1979年   108篇
  1978年   77篇
  1977年   87篇
  1976年   71篇
  1975年   87篇
  1974年   68篇
  1973年   56篇
  1972年   63篇
排序方式: 共有9031条查询结果,搜索用时 453 毫秒
141.
Public policy decisions in health are increasingly difficult and expensive. Although there will never be enough information available, private foundations can help to bridge the most important gaps in knowledge. Larger foundations may also wish to respond to those who doubt the value of foundation activities. This article reviews the experiences over the past eight years of The Robert Wood Johnson Foundation in employing evaluation and related social research procedures in the planning and implementation of a major philanthropic effort to improve the health and medical care of Americans. Discussed are the still evolving Foundation evaluation framework, the unanticipated problems in undertaking specific evaluations, and the substantive findings of some of the studies.  相似文献   
142.
An "age-time-area diagram" (referred to as a-t diagram) which is used as the basis for discussing different used and applications of variously defined mortality rates, as well two kinds of measurements for life expectancy is proprosed. The proposal is built upon the Lexis diagram. The a-t diagram is used to define a new way of measuring child mortality, projecting population, and proposing a formula for measuring successive and nonsuccessive life expectancy.  相似文献   
143.
144.
The development of the Health Demographic Profile System, which is based on the 1980 census, is described. The system includes social and economic indicators designed to identify high risk target populations, in terms of mental health and general health service needs, as well as to describe the social and economic structure of both mental health service and other small geographic areas. The report describes: (1) the original system, that is, the Mental Health Demographic Profile System (MHDPS), which is based on the 1970 census, including details of the approach and content, (2) the 1980 provisional indicators and planned products, (3) plans for the development of a longitudinal system based on 1960, 1970, and 1980 data, and (4) current and future studies related to the 1980 Health Demographic Profile System.  相似文献   
145.
Abstract Extract I have suggested that at a given birth order the probability of having a further pregnancy is greater when the last pregnancy had been spontaneously aborted than when it resulted in a birth.(2) Léridon,(3)in the course of a valuable paper on foetal wastage, presents data which, according to him, impugn my suggestion. I would like to question his claim.  相似文献   
146.
147.
Adoption of the most effective methods of contraception requires individual decision-making and negotiation with contraceptive providers. In order to take account of both behavioral elements, a two-dimensional framework for understanding contraceptive adoption and continuation by unmarried young is proposed, incorporating a "social-psychological model" of individual decision-making and an "interpersonal model" of factors affecting provider-client interaction. The social-psychological model is based on an earlier value-expectancy theory of behavior motivation as applied to health-related behaviors. The interpersonal model is derived from conflict-bargaining perspectives on professional-client interaction; it is suggested that expectations for this interaction are based on a limited number of internalized "models": the "professional"; the "bureaucratic"; the "commercial"; and the "parental." Insofar as client and professional "models" disagree, communication may break down and client understanding and/or acceptance of provider advice cannot be assured. The components of the social-psychological and interpersonal models are described in detail, and a combined framework is proposed.  相似文献   
148.
149.
150.
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