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   12763篇
  免费   346篇
  国内免费   2篇
管理学   1771篇
民族学   71篇
人才学   3篇
人口学   1160篇
丛书文集   79篇
理论方法论   1312篇
综合类   276篇
社会学   6340篇
统计学   2099篇
  2021年   72篇
  2020年   181篇
  2019年   303篇
  2018年   319篇
  2017年   446篇
  2016年   300篇
  2015年   239篇
  2014年   303篇
  2013年   2122篇
  2012年   429篇
  2011年   410篇
  2010年   321篇
  2009年   316篇
  2008年   298篇
  2007年   340篇
  2006年   308篇
  2005年   291篇
  2004年   276篇
  2003年   211篇
  2002年   246篇
  2001年   316篇
  2000年   279篇
  1999年   277篇
  1998年   213篇
  1997年   192篇
  1996年   181篇
  1995年   180篇
  1994年   182篇
  1993年   182篇
  1992年   176篇
  1991年   178篇
  1990年   178篇
  1989年   170篇
  1988年   163篇
  1987年   184篇
  1986年   141篇
  1985年   178篇
  1984年   189篇
  1983年   163篇
  1982年   150篇
  1981年   106篇
  1980年   132篇
  1979年   134篇
  1978年   120篇
  1977年   99篇
  1976年   104篇
  1975年   113篇
  1974年   108篇
  1973年   84篇
  1972年   69篇
排序方式: 共有10000条查询结果,搜索用时 328 毫秒
851.
After-school settings are interpersonal in nature, and the quality of the relationships that are forged can directly influence youths' attendance decisions and the developmental benefits they derive. Programs should more effectively capitalize on this potential for caring adult-staff relationships.  相似文献   
852.
Marginal Means/Rates Models for Multiple Type Recurrent Event Data   总被引:3,自引:0,他引:3  
Recurrent events are frequently observed in biomedical studies, and often more than one type of event is of interest. Follow-up time may be censored due to loss to follow-up or administrative censoring. We propose a class of semi-parametric marginal means/rates models, with a general relative risk form, for assessing the effect of covariates on the censored event processes of interest. We formulate estimating equations for the model parameters, and examine asymptotic properties of the parameter estimators. Finite sample properties of the regression coefficients are examined through simulations. The proposed methods are applied to a retrospective cohort study of risk factors for preschool asthma.  相似文献   
853.
854.
855.
Adolescent suicide is increasing in the United States and the incidence of suicide gestures and attempts in juvenile correctional facilities is high. The attitudes of correctional staff toward adolescents and toward suicidal behavior may contribute to the increase. Suicide is often the outcome of a progression of problems that have isolated the adolescent from meaningful social relationships. Correctional staff must be aware of the phenomenon of adolescent suicide and be given training to deal with it effectively within the institution. Institutional staff have commonly seen suicide gestures or attempts as acting out behavior rather than a symptom of low self-esteem or inability to cope with institutional placement. This discussion examines the phenomenon of adolescent suicide and the impact the juvenile justice system has on its occurrence. It will also include an examination of interdisciplinary interventive strategies which can be used in an institutional setting.  相似文献   
856.
857.
The regulatory environment is assumed to be characterized by changing labor costs and productivity, and by the existence of set-up costs for rate reviews. If the commission behaves myopically, price changes are shown to occur only when a threshold deviation of actual from target return is reached. During periods where productivity (wage) increases predominate, the actual return is thus consistently higher (lower) than the target level. If, however, the commission incorporates dynamic trends into its decision-making process, there are intervals where actual return both exceeds and falls short of target levels; on average, the firm earns over time a return that is approximately equal to the target level.  相似文献   
858.
The implications of retirement for marital and family relationships were explored in golden wedding couples, against a background of those few studies that have so far examined relationships in long-married couples. Older couples can be described in two domains: behavioral and affective. Five activity types are derived from the amount or diversity of shared activities between spouses during a typical day. These types interact with the degree of intimacy measured on two instruments. It was concluded that retirement does not affect intimacy directly, but that it does indirectly through extra time and proximity which provide opportunity for enhancing prevailing intimacy between partners or for magnifying irritations.  相似文献   
859.
Undergraduate subjects were seen to accurately discriminate between simulating actors and genuinely disabled males confined to wheelchairs. Judgments were based on skill in manipulating the wheelchair, poorer muscular development of the disabled, and on appearance of clothing. Implications for research on the disabled employing actors was discussed.This study was supported by a grant from the York University Faculty of Arts awarded to the first two authors. The project was performed as the third author's Honours thesis. The authors wish to thank all participants for their cooperation and assistance in making this research possible. The authors also wish to thank Gail Kenyon, Coordinator of the Centre for Handicapped Students who helped recruit participants for the videotaping and to Lucie Cantrell, Executive Officer of the York University Counselling and Development Centre who arranged for the use of the Centre's facilities and equipment.  相似文献   
860.
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