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   67535篇
  免费   2837篇
  国内免费   31篇
  2020年   856篇
  2019年   1023篇
  2018年   1432篇
  2017年   1430篇
  2016年   1523篇
  2015年   1089篇
  2014年   1335篇
  2013年   6153篇
  2012年   2420篇
  2011年   2436篇
  2010年   1492篇
  2009年   1532篇
  2008年   2131篇
  2007年   2086篇
  2006年   1962篇
  2005年   1682篇
  2004年   1689篇
  2003年   1653篇
  2002年   1563篇
  2001年   2143篇
  2000年   2011篇
  1999年   1543篇
  1998年   801篇
  1997年   719篇
  1996年   763篇
  1995年   701篇
  1994年   683篇
  1993年   658篇
  1992年   1230篇
  1991年   1147篇
  1990年   1111篇
  1989年   1057篇
  1988年   1012篇
  1987年   960篇
  1986年   972篇
  1985年   1042篇
  1984年   869篇
  1983年   749篇
  1982年   586篇
  1981年   584篇
  1979年   843篇
  1978年   661篇
  1977年   569篇
  1976年   566篇
  1975年   689篇
  1974年   777篇
  1973年   785篇
  1972年   656篇
  1971年   601篇
  1968年   636篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
131.
132.
Previous research has revealed that individuals have expectations for the development of romance based on personal experience and cultural images. A series of research questions and hypotheses was generated and a sequence of hierarchical log-linear analysis models axis developed to test (a) the effect of gender and knowledge of relational stage and relationship type on prediction of next-occurring actions in the development of a romance, (b) the use of compliance-gaining strategies intended to advance a relationship to the next stage, and (c) justification of secondary goals in which participants reported why they chose the strategies they did as opposed to other alternatives. The data revealed effects for relational stage progression on prediction of ensuing actions. Ingratiation, explanation, and direct requests were popular strategies for developing intimacy. Gender differences in terms of secondary goals were reported. Results are discussed in terms of relational memory structures for the development of intimacy.  相似文献   
133.
134.
The purpose of this meta-analysis of randomized controlled trials was to evaluate the efficacy of psychological interventions for adults with noncancerous chronic low back pain (CLBP). The authors updated and expanded upon prior meta-analyses by using broad definitions of CLBP and psychological intervention, a broad data search strategy, and state-of-the-art data analysis techniques. All relevant controlled clinical trials meeting the inclusion criteria were identified primarily through a computer-aided literature search. Two independent reviewers screened abstracts and articles for inclusion criteria and extracted relevant data. Cohen's d effect sizes were calculated by using a random effects model. Outcomes included pain intensity, emotional functioning, physical functioning (pain interference or pain-specific disability, health-related quality of life), participant ratings of global improvement, health care utilization, health care provider visits, pain medications, and employment/disability compensation status. A total of 205 effect sizes from 22 studies were pooled in 34 analyses. Positive effects of psychological interventions, contrasted with various control groups, were noted for pain intensity, pain-related interference, health-related quality of life, and depression. Cognitive-behavioral and self-regulatory treatments were specifically found to be efficacious. Multidisciplinary approaches that included a psychological component, when compared with active control conditions, were also noted to have positive short-term effects on pain interference and positive long-term effects on return to work. The results demonstrated positive effects of psychological interventions for CLBP. The rigor of the methods used, as well as the results that reflect mild to moderate heterogeneity and minimal publication bias, suggest confidence in the conclusions of this review.  相似文献   
135.
Suicide and homicide rates by age were analyzed for Canada and the United States, indicating that suicide is higher in Canada and that homicide is higher in the United States. Results indicated a positive association between homicide and suicide rates in the United States but these two rates of death were not significantly associated in Canada. Holinger (1987) had associated the relative size of the cohort to the rates of suicide and homicide in young people in the United States. The more current data in both countries did not support Holinger's results. Using the measure devised by Easterlin (1980) and Ahlburg and Schapiro (1984) –that is, the proportion of youths aged 15–24 relative to adults aged 25–64–the correlation between the size of the youth cohort and the suicide rate of youths aged 15–24 was negative. It is concluded that the two patterns in these two countries may be explained from a historical perspective.  相似文献   
136.
137.
138.
139.
Ohne Zusammenfassung
Physiological foundations of behaviour
  相似文献   
140.
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