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   7047篇
  免费   243篇
管理学   826篇
民族学   29篇
人才学   3篇
人口学   699篇
丛书文集   26篇
教育普及   1篇
理论方法论   708篇
综合类   66篇
社会学   3748篇
统计学   1184篇
  2023年   63篇
  2021年   59篇
  2020年   111篇
  2019年   143篇
  2018年   175篇
  2017年   256篇
  2016年   177篇
  2015年   121篇
  2014年   212篇
  2013年   1678篇
  2012年   219篇
  2011年   212篇
  2010年   170篇
  2009年   136篇
  2008年   178篇
  2007年   173篇
  2006年   186篇
  2005年   142篇
  2004年   142篇
  2003年   95篇
  2002年   127篇
  2001年   150篇
  2000年   145篇
  1999年   155篇
  1998年   127篇
  1997年   96篇
  1996年   114篇
  1995年   84篇
  1994年   78篇
  1993年   111篇
  1992年   113篇
  1991年   119篇
  1990年   91篇
  1989年   90篇
  1988年   70篇
  1987年   76篇
  1986年   69篇
  1985年   80篇
  1984年   73篇
  1983年   77篇
  1982年   51篇
  1981年   58篇
  1980年   45篇
  1979年   51篇
  1978年   43篇
  1977年   38篇
  1976年   37篇
  1975年   35篇
  1974年   42篇
  1973年   31篇
排序方式: 共有7290条查询结果,搜索用时 718 毫秒
1.
Urban Ecosystems - The development of urban areas imposes challenges that wildlife must adapt to in order to persist in these new habitats. One of the greatest changes brought by urbanization has...  相似文献   
2.
Theory and Society - The massive expansion of US higher education after World War II is a sociological puzzle: a spectacular feat of state capacity-building in a highly federated polity. Prior...  相似文献   
3.
This paper discusses an emerging role for Philippine NGOs—building and maintaining intersectoral cooperation among various sectors of society to tackle key issues like agricultural development, HIV/AIDS, and agrarian reform. The three case studies elaborated in the paper show that Philippine NGOs play important intermediary and bridging functions crucial for the success of multistakeholder partnerships. NGOs are well equipped for this because of their middle-class and professional nature and because of various characteristics like autonomy, flexibility, and the ability to mobilize resources.  相似文献   
4.
A class of symmetric bivariate uniform distributions is proposed for use in statistical modeling. The distributions may be constructed to be absolutely continuous with correlations as close to±1 as desired. Expressions for the correlations, regressions and copulas are found. An extension to three dimensions is proposed.  相似文献   
5.
6.
7.
The authors examined the relative contributions of both proximal and distal supports to the career interests and vocational self‐efficacy in a multiethnic sample (N = 139) of middle school adolescents. Consistent with Social Cognitive Career Theory, it was found that (a) vocational self‐efficacy and career planning/exploration efficacy consistently predicted young adolescents' career interests across Holland (J. L. Holland, D. R. Whitney, N. S. Cole, & J. M. Richards, 1969) themes; (b) gender and career gender‐typing predicted interests in Realistic, Investigative, and Social careers; and (c) perceived parent support accounted for 29% to 43% of the total unique variance in vocational self‐efficacy for all Holland theme careers.  相似文献   
8.
Parameter design or robust parameter design (RPD) is an engineering methodology intended as a cost-effective approach for improving the quality of products and processes. The goal of parameter design is to choose the levels of the control variables that optimize a defined quality characteristic. An essential component of RPD involves the assumption of well estimated models for the process mean and variance. Traditionally, the modeling of the mean and variance has been done parametrically. It is often the case, particularly when modeling the variance, that nonparametric techniques are more appropriate due to the nature of the curvature in the underlying function. Most response surface experiments involve sparse data. In sparse data situations with unusual curvature in the underlying function, nonparametric techniques often result in estimates with problematic variation whereas their parametric counterparts may result in estimates with problematic bias. We propose the use of semi-parametric modeling within the robust design setting, combining parametric and nonparametric functions to improve the quality of both mean and variance model estimation. The proposed method will be illustrated with an example and simulations.  相似文献   
9.
The research reported in this article is based on a study of the strategic planning practices of the 500 fastest growing privately held smaller companies in the United States ranked according to percentage of sales increases from 1978 to 1982.p1 Based on the information provided, a clear picture emerges regarding the actual role of strategic planning in rapid growth companies.  相似文献   
10.
Expectations, Capital Gains, and Income   总被引:2,自引:0,他引:2  
A theoretical framework for the measurement of income under uncertainty is developed that addresses some long-standing controversies about the treatment of capital gains. The consequences for economic analysis and policy making are potentially serious, because the treatment of capital gains can significantly affect some major macroeconomic aggregates, including national income and savings, balance of payments deficits, government deficits, and depreciation. (JEL O47 , P44 , Q32 )  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