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   25182篇
  免费   329篇
  国内免费   1篇
管理学   3459篇
民族学   142篇
人才学   3篇
人口学   2214篇
丛书文集   107篇
教育普及   1篇
理论方法论   2380篇
综合类   232篇
社会学   12518篇
统计学   4456篇
  2023年   165篇
  2022年   101篇
  2021年   169篇
  2020年   472篇
  2019年   667篇
  2018年   694篇
  2017年   909篇
  2016年   742篇
  2015年   497篇
  2014年   693篇
  2013年   4329篇
  2012年   880篇
  2011年   803篇
  2010年   614篇
  2009年   539篇
  2008年   681篇
  2007年   628篇
  2006年   653篇
  2005年   579篇
  2004年   609篇
  2003年   516篇
  2002年   540篇
  2001年   596篇
  2000年   516篇
  1999年   523篇
  1998年   417篇
  1997年   352篇
  1996年   355篇
  1995年   369篇
  1994年   329篇
  1993年   342篇
  1992年   366篇
  1991年   374篇
  1990年   342篇
  1989年   301篇
  1988年   300篇
  1987年   249篇
  1986年   273篇
  1985年   307篇
  1984年   269篇
  1983年   240篇
  1982年   215篇
  1981年   175篇
  1980年   200篇
  1979年   213篇
  1978年   175篇
  1977年   154篇
  1976年   127篇
  1975年   133篇
  1974年   122篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
71.
72.
Lesbian, gay, bisexual, transgender and queer-identified (LGBTQ) youth are a population with a unique set of service needs. Existing research on effective service methods with LGBTQ youth is limited. Youth empowerment holds potential as an approach that can impact well-being among youth who face discrimination. The current study explores the relationship between the social justice youth development framework (Ginwright and James, New Directions Youth Dev 96:27–46, 2002) and youth empowerment in a sample of LGBTQ youth. Multiple regression analysis of data collected through a community-based youth program identified critical consciousness and community engagement as significant predictors of empowerment. Findings suggest that programs that promote these factors among LGBTQ youth using the social justice youth development framework may enhance empowerment thereby increasing other aspects of well-being.  相似文献   
73.
74.
The crucial issues in the administration of higher education embody the very purpose, function, and concept of each institution. The institution's administrative policies are based on the combined philosophy of many conflicting interest groups such as taxpayers, donors, administrators, faculty, students, staff, and users of university services. A function performed by the university which is receiving increasing attention and outside pressure is the formulation of admissions policy for newly entering students. This paper investigates problems involved in the admissions planning and presents a goal programming model as an optimization tool for the problem.  相似文献   
75.
In an experiment, thirty-six professional insurance men employed the utility method, the worry method, and the comparison method in two insurance problems to determine the appropriate insurance coverage. It was found that the best act with the utility method almost always was no insurance, whereas the best act with the other two methods tended to be complete insurance. The utility method best act rarely agreed with the subject's actual preferred act, while the comparison method best act usually was the same or almost the same as the actual preferred act. While the worry method suggests that the subjects typically are risk averse, the utility functions obtained tend to show that the subjects typically are not risk averse.  相似文献   
76.
The purpose of this paper is to present the theory of the multi-product firm in situations where the revenue function depends not only on the rate of output but also on changes in the rate of output, and, similarly, where the cost function depends on changes in the rate of factor utilization as well as the rate of their utilization. Since the analysis will utilize the calculus of variations, a general introduction to this technique is also presented. The model analyzed assumes perfect foresight and knowledge concerning the revenue, cost, and production functions, and the calculus of variations is used to derive the conditions for an extremum. The first section presents the mathematical model and the model of the firm, and the optimality conditions are discussed in the second section.  相似文献   
77.
In most econometrics courses the students are given limited exposure to the empirical applications of econometric theory. The use of canned programs would make it possible to cover more applied econometric work, and help prepare the students for more empirical work. The computer can be a valuable teaching aid for both instructor and student. The students will also gain valuable experience in the area of computer assisted data analysis. This paper discusses many of the programs appropriate for use in econometrics courses. Examples of problems using programs, and several alternative outlines of possible courses in applied econometrics are presented.  相似文献   
78.
The use of computers in teaching statistics can make an impact upon students in two ways. First, it can affect the amount and rate of learning of statistics. Second, it can affect student attitudes toward computers, statistics and quantitative methods. This note reports a study on the effects of the computer in teaching statistics on student attitudes. The data are based on pre- and post-course questionnaires administered in a first-year statistics sequence. The results partly confirm expectations, and partly raise questions for further investigation.  相似文献   
79.
本文通过解读准噶尔汗国灭亡后卫拉特蒙古佚名氏史家撰写的几篇托忒文史籍,探讨当时卫拉特人对汗国灭亡的反思及对清准战争的历史记忆.几位史家的文本反映了"四卫拉特"这一历史框架的稳定性,以及卫拉特人在政治认同方面的一些变化.  相似文献   
80.
A heteroscedastic regression based on the odd log-logistic Marshall–Olkin normal (OLLMON) distribution is defined by extending previous models. Some structural properties of this distribution are presented. The estimation of the parameters is addressed by maximum likelihood. For different parameter settings, sample sizes and some scenarios, various simulations investigate the performance of the heteroscedastic OLLMON regression. We use residual analysis to detect influential observations and to check the model assumptions. The new regression explains the mass loss of different wood species in civil construction in Brazil.  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