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   32743篇
  免费   628篇
  国内免费   1篇
管理学   4808篇
民族学   177篇
人才学   2篇
人口学   4492篇
丛书文集   113篇
教育普及   3篇
理论方法论   2640篇
现状及发展   1篇
综合类   581篇
社会学   15374篇
统计学   5181篇
  2021年   132篇
  2020年   324篇
  2019年   442篇
  2018年   2065篇
  2017年   2260篇
  2016年   1549篇
  2015年   442篇
  2014年   556篇
  2013年   3678篇
  2012年   1053篇
  2011年   1812篇
  2010年   1528篇
  2009年   1241篇
  2008年   1348篇
  2007年   1529篇
  2006年   594篇
  2005年   777篇
  2004年   754篇
  2003年   676篇
  2002年   606篇
  2001年   595篇
  2000年   619篇
  1999年   529篇
  1998年   388篇
  1997年   371篇
  1996年   420篇
  1995年   361篇
  1994年   340篇
  1993年   339篇
  1992年   393篇
  1991年   364篇
  1990年   326篇
  1989年   342篇
  1988年   338篇
  1987年   286篇
  1986年   293篇
  1985年   332篇
  1984年   321篇
  1983年   288篇
  1982年   246篇
  1981年   218篇
  1980年   197篇
  1979年   236篇
  1978年   214篇
  1977年   191篇
  1976年   166篇
  1975年   192篇
  1974年   141篇
  1973年   130篇
  1971年   114篇
排序方式: 共有10000条查询结果,搜索用时 547 毫秒
901.
902.
The aim of this study is to analyze the effect of fiscal policy by race, disaggregating to consider Uruguayans with primarily European, African and indigenous ancestry. We perform an incidence analysis, an estimation of the effect of fiscal policy on the poverty exit rate and an assessment of the impact on the average ethno-racial gaps. The findings support the idea that fiscal policy reduces (but does not eliminate) ethnic gaps. This result is led by health care and educational transfers, and to a lesser degree by direct transfers. We do not consider quality issues with public services, which may affect the estimated narrowing of gaps. Finally, we find that Afro-descendants and indigenous individuals do not capture the full potential of education transfers because of their high drop-out rate.  相似文献   
903.
In the article results of resilience research are presented and a systemic concept of resilience is derived, which differentiates the term from other models regarding psychic health. The resilience square shows essential factors for resilience. Based on this the idea of resilience is transferred to systems and organizations. The article deepens the resilience approach of Mohr (2016).  相似文献   
904.
This project applies and expands Gallagher’s (2005) theories concerning body image and body schema to the concept of gender in general and in particular how understanding gender through this lens can be used to aid transgender people in understanding their own gender. In addition, the paper discusses the effects of gender-incongruent mirroring for transgender and gender nonconforming persons’ ability to know their own feelings and its role in the development of shame. In furthering the understanding of gender and self-knowledge, the concepts of tacit knowledge and phantom limbs reveal how one comes to know gender as a fundamental aspect of the self.  相似文献   
905.
This study examined the effect of Testofen, a specialised Trigonella foenum-graecum seed extract on the symptoms of possible androgen deficiency, sexual function and serum androgen concentrations in healthy aging males. This was a double-blind, randomised, placebo-controlled trial involving 120 healthy men aged between 43 and 70 years of age. The active treatment was standardised Trigonella foenum-graecum seed extract at a dose of 600?mg/day for 12 weeks. The primary outcome measure was the change in the Aging Male Symptom questionnaire (AMS), a measure of possible androgen deficiency symptoms; secondary outcome measures were sexual function and serum testosterone. There was a significant decrease in AMS score over time and between the active and placebo groups. Sexual function improved, including number of morning erections and frequency of sexual activity. Both total serum testosterone and free testosterone increased compared to placebo after 12 weeks of active treatment. Trigonella foenum-graecum seed extract is a safe and effective treatment for reducing symptoms of possible androgen deficiency, improves sexual function and increases serum testosterone in healthy middle-aged and older men.  相似文献   
906.
This paper documents the extent to which collectors—specifically, those owning collectible classic US postage stamps—experience an opportunity cost associated with expenditures on their collection. Results show, based on stamp price, S&P 500, bond, and T-bill rate data over the period 1969 through 2013, that collectible stamps tend to underperform stocks and bonds on a risk-adjusted basis. Using estimates based on the Modigliani measure (M2), it was determined that collectors incur an opportunity cost when selecting collectible stamps over more traditional investments. However, it is known that collecting as a hobby provides sociological and psychological benefits. This paper adds to the literature by illustrating how collecting also provides psychic return benefits that can be valued similarly to investment returns. In this study, the foregone return rate of stamp collecting for those who allocate a significant percent of available resources to their collection equates to between 3 and 13 % on an annual basis.  相似文献   
907.
Financial literacy programs are quickly gaining in popularity around the globe. A relatively new target group is survivors of intimate partner violence (IPV), an economically vulnerable group for whom resource acquisition is related to personal safety and well-being. This study is a randomized controlled trial of a financial literacy curriculum designed for and delivered to a sample of 300 IPV survivors from 14 agencies in seven US states and Puerto Rico. Findings, based on difference-in-difference analyses and OLS regression models, indicate a strong effect of the curriculum on self-reported financial knowledge and behaviors and support the expansion of similar programs for survivors.  相似文献   
908.
This paper uses longitudinal data from the Philippines to analyze determinants of children’s time allocation. The estimation method takes into account both the simultaneity of time use decisions, by allowing for correlation of residuals across time uses, and unobservable family heterogeneity, through the inclusion of household fixed effects. Importantly, this improved estimation method leads to different results than when applying the methods previously used in the literature. Girls suffer significantly from the absence of their mother with a reduction in time spent in school that is equivalent to dropping out completely. This effect is substantially larger when controlling for household unobservables than when not. Boys increase time spent working on market related activities in response to an absent father, although this time appears to come out of leisure rather than school or doing household chores. Land ownership substantially increase the time boys spend on school activities, whereas renting land reduces the time girls spend on school. Finally, there does not appear to be a substantial trade-off between time spent on school and work, either in the market or at home.  相似文献   
909.
We discuss qualitative and quantitative research findings from a study exploring the benefits and effectiveness of a 12-week arts-based mindfulness group program for vulnerable children (children who were involved with the child welfare or mental health systems and experienced a variety of challenges). Using post-group individual interviews with children/guardians, and pre and post-intervention self-report data (using the Piers-Harris Children’s Self-Concept Scale and the Resiliency Scales for Children and Adolescents), we hypothesized that children would have improved resilience and self-concept after having completed the program. Interpretive thematic qualitative analysis was conducted using transcribed interview data collected from 47 children (30 girls and 17 boys with a mean age of 10.38 years). The perceived benefits of participating in the group included improved (a) emotion regulation, (b) mood, (c) coping/social skills, (d) confidence and self-esteem, (e) empathy, and (f) ability to pay attention and focus. The quantitative analysis used self-report data from 77 children (43 girls and 34 boys with a mean age of 10.34 years). A repeated measures MANOVA was used to examine changes across the intervention period. Our hypothesis that children would have better scores on self-concept after having completed the program was partially supported and this result reflected the perceived improvements derived from the qualitative analysis. The hypothesis that resilience would improve post-group was not supported. Using these promising results, we discuss how strengths-based and arts-based mindfulness group methods may be effective in engaging vulnerable children in a beneficial helping process.  相似文献   
910.
The amygdala is essential for processing emotions, including the processing of aversive faces. The aim of this multimethodological study was to relate the amygdala reactivity of students (= 88) toward teachers’ fearful and angry faces, to students’ relationship with their teachers. Furthermore, students’ neural responses during the perception of teachers’ faces were tested as predictors of test anxiety (controlling for neuroticism as a potential trait anxiety effect). Multiple regression analysis revealed that students reporting high‐quality teacher–student relationships showed stronger amygdala activity toward fearful faces, which was related to worry. Furthermore, students with high levels of neuroticism tended to perceive their teachers as motivators and showed higher amygdala activity toward angry faces, which was related to the measures of emotionality.  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