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   19854篇
  免费   339篇
  国内免费   3篇
管理学   2761篇
民族学   99篇
人才学   3篇
人口学   1707篇
丛书文集   104篇
理论方法论   1902篇
综合类   367篇
社会学   9597篇
统计学   3656篇
  2020年   288篇
  2019年   457篇
  2018年   450篇
  2017年   663篇
  2016年   465篇
  2015年   385篇
  2014年   478篇
  2013年   3389篇
  2012年   637篇
  2011年   579篇
  2010年   495篇
  2009年   449篇
  2008年   515篇
  2007年   543篇
  2006年   474篇
  2005年   456篇
  2004年   411篇
  2003年   337篇
  2002年   387篇
  2001年   481篇
  2000年   410篇
  1999年   381篇
  1998年   317篇
  1997年   309篇
  1996年   285篇
  1995年   270篇
  1994年   252篇
  1993年   276篇
  1992年   292篇
  1991年   277篇
  1990年   289篇
  1989年   252篇
  1988年   250篇
  1987年   264篇
  1986年   226篇
  1985年   237篇
  1984年   275篇
  1983年   245篇
  1982年   222篇
  1981年   169篇
  1980年   204篇
  1979年   222篇
  1978年   177篇
  1977年   164篇
  1976年   159篇
  1975年   183篇
  1974年   161篇
  1973年   121篇
  1972年   116篇
  1971年   102篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
931.
New societal obligations for communicating risk information are emerging in a variety of contexts. This article draws upon the lengthy societal experience with citizen participation programs to identify how risk communication efforts may be effectively structured and implemented. Six major propositions address such themes as means/ends differences in expectations, the timing of the program, the role of credibility and trust, the need for technical and analytical resources, differing thresholds of public involvement, and limitations upon current understandings. Key conclusions for the design of risk communication programs are set forth.  相似文献   
932.
Abstract In recent years, several agricultural cooperatives have undergone significant restructuring. Some have been taken through a conversion process and have been reorganized as “investor-oriented firms” (IOFs). This phenomenon has attracted the interest of agricultural economists, but it has not been analyzed by sociologists. This article examines the discourse with which agricultural economists have approached the conversion issue. Drawing upon Fraser's discussion of “needs talk,” and inspired by Kloppenburg's analysis of the agricultural scientific complex, an argument is made that a reprivatization discourse of neoclassical economics has effectively depoliticized discussion about the future of cooperative enterprise. It is further argued that a repoliticization of cooperation is necessary in order to assure the protection of extra-economic values and oppositional discourse that is embedded in the historical development of cooperative practices and institutions. We focus here on the role of expert discourse as it relates to the reinvention of cooperative institutions in the agricultural economy. It is argued that this discourse would be improved by greater attention to historical and sociological forces, rather than remaining narrowly focused on economism.  相似文献   
933.
High rates of psychiatric symptoms have been reported in pathological gamblers. This study of psychiatric comorbidity in pathological gamblers is the first to use structured psychiatric interviews assessing DSM-III-R Axis I and II disorders. The Structured Clinical Interview for DSM III-R (SCID-P, SCID-II) was administered to 40 (25 male, 15 male) pathological gamblers seeking outpatient treatment in Minnesota for gambling, and 64 (41 male, 23 female) controls. High lifetime rates of Axis I (92%) but not Axis II (25%) psychopathology were found in pathological gamblers as compared to controls. No differences between male and female gamblers were found in rates of affective, substance use or personality disorders. Females had higher rates of anxiety disorders and histories of physical/sexual abuse. Possible associations between psychiatric disorders and pathological gambling are discussed along with gambler typologies and implications for future research.The authors wish to gratefully acknowledge the assistance of: Gary Christenson, M.D., Carol Peterson, Ph.D., William Meller, M.D., Thomas Mackenzie, M.D.  相似文献   
934.
935.
The perceived severity of the problem of “drift” in the foster care system has encouraged agencies nationwide to accept permanency planning, but perhaps with limited attention to the planning process. This article examines the phenomenon of permanency planning from a planning perspective by focusing on: (a) definition of the permanency planning problem, (b) understanding of issues relevant to permanency planning (caseworker, program and systemic), (c) appreciation of the operational context (political, economic and social factors), and (d) evaluation of available options and possible consequences in developing or improving a permanency planning program. Permanency planning is not a simple, ready-made program applicable to any situation; it involves coordinated efforts by workers, service systems, and society in general, and requires time, commitment and resources. Successful planning for permanency planning can permit more children to grow up in homes providing continuity and stability.  相似文献   
936.
We examine nations which deviate significantly from the ?2/3 sizedensity slope previously observed for the aggregated political subdivisions of 98 modern nations and previously derived from the theory of timeminimization. We correct Stephan’s original list of deviant nations, demonstrate that all slopes more negative than ?2/3 were due to the erroneous inclusion of cities in the original data sets, develop a theory to account for the less negative deviant slopes, and test the theory both through statistical manipulation of current data and through analysis of available historical data.  相似文献   
937.
938.
939.
940.
Abstract Published data are reviewed and it is concluded that about one fertilized ovum in three perishes before pregnancy is recognised. Of those surviving until pregnancy is recognized, one in four or five perish before term. So spontaneous loss accounts for about one fertilized ovum in two in a medically advanced society.  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