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   11369篇
  免费   294篇
管理学   1414篇
民族学   48篇
人口学   929篇
丛书文集   62篇
教育普及   3篇
理论方法论   1004篇
综合类   114篇
社会学   6101篇
统计学   1988篇
  2023年   56篇
  2021年   61篇
  2020年   138篇
  2019年   208篇
  2018年   234篇
  2017年   335篇
  2016年   238篇
  2015年   184篇
  2014年   252篇
  2013年   2324篇
  2012年   301篇
  2011年   302篇
  2010年   222篇
  2009年   203篇
  2008年   223篇
  2007年   223篇
  2006年   246篇
  2005年   221篇
  2004年   185篇
  2003年   165篇
  2002年   186篇
  2001年   273篇
  2000年   255篇
  1999年   269篇
  1998年   170篇
  1997年   152篇
  1996年   210篇
  1995年   208篇
  1994年   216篇
  1993年   221篇
  1992年   232篇
  1991年   217篇
  1990年   240篇
  1989年   211篇
  1988年   199篇
  1987年   176篇
  1986年   164篇
  1985年   172篇
  1984年   176篇
  1983年   124篇
  1982年   123篇
  1981年   103篇
  1980年   115篇
  1979年   113篇
  1978年   96篇
  1977年   84篇
  1976年   82篇
  1975年   85篇
  1974年   57篇
  1973年   54篇
排序方式: 共有10000条查询结果,搜索用时 218 毫秒
991.
The number of people accessing the Internet for sexual purposes (cybersex) has increased dramatically over the last 10 years. However, little research has been conducted to determine how frequently clients present for treatment with cybersex‐related issues. One hundred sixty‐four clinical members of the American Association for Marriage and Family Therapy participated in the current study, which was conducted to identify the impacts of cybersex on MFTs’ practices. Most respondents report seeing clients with cybersex‐related issues, with client numbers increasing over the past 2 years. Although most respondents felt prepared to diagnose and treat adults with cybersex problems, half felt unprepared to diagnose and treat children. Lastly, most respondents reported that their required college courses were not helpful in preparing them to diagnose and treat cybersex‐related problems. The implications of study findings are discussed.  相似文献   
992.
The author of this article argues that inflation is a neglected area in corporate planning despite the events of 1974/1975. The planning problem which companies face because of inflation is defined, while acknowledging that it is difficult to solve. Recent experience has shown that inflation has a direct impact on every major area of business. Thus it is essential that there is a meaningful attempt to handle these problems in planning. The author discusses his approach to grasping this nettle.  相似文献   
993.
994.
995.
In the last 10 years much has been written about the increasing environmental uncertainty firms and other organizations have to cope with. This uncertainty made it much more difficult to plan, since unexpected events often made them obsolete.Flexibility is frequently considered as a way to ‘solve’ the problem of environmental turbulence.In this article, based upon theoretical and empirical research, the author explores the concept of flexibility, puts forward some of his research findings, and advances some implications on how to increase strategic flexibility.  相似文献   
996.
997.
998.
Summary.  We consider the Bayesian analysis of human movement data, where the subjects perform various reaching tasks. A set of markers is placed on each subject and a system of cameras records the three-dimensional Cartesian co-ordinates of the markers during the reaching movement. It is of interest to describe the mean and variability of the curves that are traced by the markers during one reaching movement, and to identify any differences due to covariates. We propose a methodology based on a hierarchical Bayesian model for the curves. An important part of the method is to obtain identifiable features of the movement so that different curves can be compared after temporal warping. We consider four landmarks and a set of equally spaced pseudolandmarks are located in between. We demonstrate that the algorithm works well in locating the landmarks, and shape analysis techniques are used to describe the posterior distribution of the mean curve. A feature of this type of data is that some parts of the movement data may be missing—the Bayesian methodology is easily adapted to cope with this situation.  相似文献   
999.
This paper discusses significant counter-transference issues and presents a conceptual framework for ordering the strategies in treating the mother in the incest family. The development of empathy is suggested as the primary engagement tool, and obstacles to its development are analyzed.The major theoretical construct that is employed in formulating the treatment approach is that of the traumagenic dynamics model presented by Finkelhor and Browne (1985). The manner in which this framework can be employed in assessment and prioritizing treatment goals is outlined. Specific approaches for the beginning phase of work with the mother are then described.  相似文献   
1000.
In this paper we consider the Capital Asset Pricing Model under Elliptical (symmetric) Distributions. This class of distributions, which contains the normal distribution, t, contaminated normal and power exponential, among others, offers a more flexible framework for modelling asset prices or returns. In order to analyze the sensibility to possible outliers and/or atypical returns of the maximum likelihood estimators, the local influence method was implemented. The results are illustrated by using a set of shares from companies who trade in the Chilean Stock Market. Our main conclusion is that symmetric distributions having heavier tails than those of the normal distribution, especially the t distribution with small degrees of freedom, show a better fit and allow the reduction of the influence of atypical returns in the maximum likelihood estimators.  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