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   14171篇
  免费   240篇
  国内免费   1篇
管理学   1808篇
民族学   67篇
人才学   4篇
人口学   1241篇
丛书文集   69篇
理论方法论   1287篇
综合类   113篇
社会学   6845篇
统计学   2978篇
  2023年   74篇
  2022年   73篇
  2021年   81篇
  2020年   211篇
  2019年   278篇
  2018年   390篇
  2017年   517篇
  2016年   358篇
  2015年   288篇
  2014年   374篇
  2013年   2554篇
  2012年   483篇
  2011年   380篇
  2010年   368篇
  2009年   281篇
  2008年   337篇
  2007年   339篇
  2006年   345篇
  2005年   307篇
  2004年   263篇
  2003年   271篇
  2002年   277篇
  2001年   381篇
  2000年   331篇
  1999年   316篇
  1998年   246篇
  1997年   217篇
  1996年   245篇
  1995年   225篇
  1994年   228篇
  1993年   197篇
  1992年   222篇
  1991年   246篇
  1990年   218篇
  1989年   182篇
  1988年   205篇
  1987年   190篇
  1986年   151篇
  1985年   191篇
  1984年   198篇
  1983年   173篇
  1982年   137篇
  1981年   104篇
  1980年   104篇
  1979年   129篇
  1978年   97篇
  1977年   89篇
  1976年   64篇
  1975年   69篇
  1974年   70篇
排序方式: 共有10000条查询结果,搜索用时 1 毫秒
451.
Mental health practitioners who find themselves working with lesbian youth have a limited knowledge base by which to guide them in the helping process. This article explores, examines, and synthesizes current literature in an attempt to uncover factors that serve to enhance adaptive coping strategies for lesbian youth.  相似文献   
452.
Van Hook J  Zhang W  Bean FD  Passel JS 《Demography》2006,43(2):361-382
The utility of postcensal population estimates depends on the adequate measurement of four major components of demographic change: fertility, mortality, immigration, and emigration. Of the four components, emigration, especially of the foreign-born, has proved the most difficult to gauge. Without "direct" methods (i.e., methods identifying who emigrates and when), demographers have relied on indirect approaches, such as residual methods. Residual estimates, however are sensitive to inaccuracies in their constituent parts and are particularly ill-suited for measuring the emigration of recent arrivals. Here we introduce a new method for estimating foreign-born emigration that takes advantage of the sample design of the Current Population Survey (CPS): repeated interviews of persons in the same housing units over a period of 16 months. Individuals appearing in a first March Supplement to the CPS but not the next include those who died in the intervening year, those who moved within the country, and those who emigrated. We use statistical methods to estimate the proportion of emigrants among those not present in the follow-up interview. Our method produces emigration estimates that are comparable to those from residual methods in the case of longer-term residents (immigrants who arrived more than 10 years ago), but yields higher--and what appear to be more accurate--estimates for recent arrivals. Although somewhat constrained by sample size, we also generate estimates by age, sex, region of birth, and duration of residence in the United States.  相似文献   
453.
A very small proportion of newborns fail to establish a normal respiratory pattern without some assistance at birth and newborns requiring resuscitative measures at birth should have a skilled practitioner able to provide it. In this small hospital midwives felt unskilled in newborn resuscitation and paediatricians were not always immediately available. A stakeholder group gathered to discuss the problem. A training program was implemented that improved the skills, confidence and support of the attending midwife to resuscitate the newborn effectively. The aim was to improve the outcome for the infant whilst maintaining the mother's choice of birthing in a small local hospital close to family and friends.  相似文献   
454.
Social Indicators Research - Monitoring progress towards the Sustainable Development Goals by 2030 requires the global community to disaggregate targets along socio-economic lines, but little has...  相似文献   
455.
Population Research and Policy Review - Often, demographers charged with projecting enrollments for school districts are asked to provide a range of future enrollments, as point estimates are not...  相似文献   
456.
Laß  Inga  Wooden  Mark 《Social indicators research》2020,147(1):111-132
Social Indicators Research - It is widely accepted that temporary jobs tend to be associated with low pay which, in turn, will have negative consequences for household income. Evidence in support...  相似文献   
457.
458.
We sought to evaluate the efficacy of successive matching training for establishing generalized reflexive matching across 4 children with autism. In Experiment 1, differential reinforcement with delay fading was efficacious in establishing “yes” and “no” matching and nonmatching responses in 2 participants when 2 identical or nonidentical picture stimuli were presented. In addition, emergent visual–visual reflexive relational responses were observed using novel picture stimuli in a transfer test phase. In Experiment 2, differential reinforcement alone was efficacious in establishing matching and nonmatching responses in the other 2 participants when 2 identical or nonidentical objects were presented. Transfer to identical objects presented through touch (i.e., tactile discrimination) was additionally observed for both participants. Procedures in the study were adapted from the PEAK Relational Training System to aid in clinical replication, and the translational results have implications for language training with individuals with autism.  相似文献   
459.
The present research examined how school contexts shape the extent to which beliefs about the potential for change (implicit theories) interact with social adversity to predict depressive symptoms. A preregistered multilevel regression analysis using data from 6,237 ninth‐grade adolescents in 25 U.S. high schools showed a three‐way interaction: Implicit theories moderated the associations between victimization and depressive symptoms only in schools with high levels of school‐level victimization, but not in schools with low victimization levels. In high‐victimization schools, adolescents who believed that people cannot change (an entity theory of personality) were more depressed when they were victimized more frequently. Thus, the mental health correlates of adolescents’ implicit theories depend on both personal experiences and the norms in the context.  相似文献   
460.
Urban Ecosystems - Critical resources for birds nesting in cities can support populations in spite of the challenges imposed by urbanization, and the identification of such resources can shed light...  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