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   2086篇
  免费   120篇
管理学   225篇
民族学   16篇
人口学   173篇
丛书文集   8篇
教育普及   1篇
理论方法论   254篇
综合类   31篇
社会学   1318篇
统计学   180篇
  2023年   24篇
  2022年   12篇
  2021年   22篇
  2020年   47篇
  2019年   86篇
  2018年   91篇
  2017年   121篇
  2016年   94篇
  2015年   64篇
  2014年   83篇
  2013年   348篇
  2012年   90篇
  2011年   92篇
  2010年   62篇
  2009年   63篇
  2008年   68篇
  2007年   68篇
  2006年   69篇
  2005年   58篇
  2004年   53篇
  2003年   39篇
  2002年   54篇
  2001年   45篇
  2000年   35篇
  1999年   37篇
  1998年   23篇
  1997年   20篇
  1996年   27篇
  1995年   19篇
  1994年   20篇
  1993年   19篇
  1992年   19篇
  1991年   25篇
  1990年   17篇
  1989年   18篇
  1988年   12篇
  1987年   17篇
  1986年   22篇
  1985年   14篇
  1984年   10篇
  1983年   8篇
  1982年   9篇
  1981年   12篇
  1980年   5篇
  1979年   12篇
  1978年   8篇
  1977年   5篇
  1976年   9篇
  1975年   8篇
  1973年   6篇
排序方式: 共有2206条查询结果,搜索用时 15 毫秒
141.
The authors' goal was to characterize predictors of attitudes toward lesbian and gay parent families (LGPF), held by students enrolled in psychology, social work, medicine, nursing, elementary, and preschool education programs in Portugal. The authors examined the predictive value of students' (n = 600) sociodemographic characteristics when assessing their attitudes toward LGPF. Participant's gender, interpersonal contact with lesbians and gay men, gender role attitudes had indirect effects on attitudes toward LGPF, through attitudes toward lesbians and gay men. Understanding characteristics associated with attitudes toward LGPF may inform decisions in terms of the education and training of helping professionals.  相似文献   
142.
We propose methods for detecting structural changes in time series with discrete‐valued observations. The detector statistics come in familiar L2‐type formulations incorporating the empirical probability generating function. Special emphasis is given to the popular models of integer autoregression and Poisson autoregression. For both models, we study mainly structural changes due to a change in distribution, but we also comment for the classical problem of parameter change. The asymptotic properties of the proposed test statistics are studied under the null hypothesis as well as under alternatives. A Monte Carlo power study on bootstrap versions of the new methods is also included along with a real data example.  相似文献   
143.
We develop testing procedures which detect if the observed time series is a martingale difference sequence. Furthermore, tests are developed that detect change–points in the conditional expectation of the series given its past. The test statistics are formulated following the approach of Fourier–type conditional expectations first proposed by Bierens (1982 Bierens, H. J. (1982). Consistent model speci?cation tests. J. Econometr. 20:105134.[Crossref], [Web of Science ®] [Google Scholar]) and have the advantage of computational simplicity. The limit behavior of the test statistics is investigated under the null hypothesis as well as under alternatives. Since the asymptotic null distribution contains unknown parameters, a bootstrap procedure is proposed in order to actually perform the test. The performance of the bootstrap version of the test is compared in finite samples with other methods for the same problem. A real–data application is also included.  相似文献   
144.
145.
This study questions the role of migration policy changes in France, Italy, and Spain for return migration to Senegal, by analyzing biographic data from the Migration between Africa and Europe (MAFE‐Senegal) survey and the contextual data of the Determinants of International Migration (DEMIG) VISA and DEMIG POLICY databases that cover major changes in migration policies in these destination countries for the different categories of migrants. Event history logistic regressions reveal that Senegalese migrants are less likely to return when the entry restrictions have become tighter. This result suggests that the decision to return depends on the possibility of migrating again after the return, which is crucial for both theory and policy regarding Western democracies' attempts to regulate migration.  相似文献   
146.
This study assessed the effectiveness of the Safer, Smarter Kids kindergarten sexual abuse prevention curriculum in meeting its educational objectives of increasing children’s knowledge of safety risks and self-protection strategies. The study utilized a two-phase non-probability convenience sample of public school kindergarten students. The sample consisted of 1169 students in four school districts in Florida. Using an alpha level of .05, a paired-samples t test was calculated to compare the mean pretest scores to the mean posttest scores of the youth participants. The mean difference was significantly greater than zero (p-value ≤.001). The measurement instrument used to assess student gains functioned well in terms of reliability (α = .82). The effect size was large with a Cohen’s d effect size of 1.09. The results indicated that completion of the Safer, Smarter Kids curriculum was followed by a significant increase in students’ knowledge of key prevention concepts with a 77 % increase in scores post intervention.  相似文献   
147.
Objective: Due to the short life expectancy of black men, it is important to understand what impacts health behaviors in this group so that interventions and programs can be developed to improve their health behaviors which may help in increasing the life expectancy of black men. The purpose of this study was to understand what perceived barriers exist for black college men that prevent them from engaging in healthy behaviors. Participants and Methods: Thirty-five black male students at a southern Historically Black College and University participated in five focus groups and four interviews. A qualitative analysis was used to analyze data for similar themes and codes. Results: Perceived barriers to engaging in healthy behaviors appear to be influenced by image, food cost, and education. Cues to action for not engaging in healthy behaviors appear to be related to role models. Conclusions: Black college men are not adequately informed or educated about elements that can impact their health and how they can improve it. College administrators and researchers should develop interventions that include elements of increasing health knowledge and age-appropriate role models to improve health behavior change among this group.  相似文献   
148.
Intimate partner violence and insecure attachment are therapeutically relevant concepts when working with couples. The link between attachment and intimate partner violence has been examined in the literature, but an area of aggression that often goes unexamined is relational aggression, or using third parties as a means of being aggressive toward a partner. We asked how participants' attachment behaviors were related to their own and partners' relational and physical aggression. We used structural equation modeling to estimate actor–partner interdependence among these relationships in 644 heterosexual couples. Results indicated significant partner paths from attachment to relational aggression, as well as significant actor paths between relational aggression and physical aggression. Implications were discussed. Data for this study were collected from the RELATE assessment.  相似文献   
149.
Growth and internationalisation of the Chinese economy have reconfigured the global value chains of many commodities with important implications for industry and rural and regional development both in and outside China. This article analyses the chain for cashmere, all stages of which have gravitated to China, and the impacts on rural development, especially for herders in remote pastoral regions. Traditionally a high‐value product, cashmere has become increasingly generic and adulterated over the past decade. More formal and closer integration of Chinese actors into the global industry and re‐orienting policy from supply‐side intervention to the enforcement of standards would enhance the competitiveness of Chinese cashmere in international fibre markets.  相似文献   
150.
Disproportionality in special education includes the underrepresentation and overrepresentation of children by gender, economic status, race, ethnicity, language, and culture. This article reviews literature on disproportionality in the United States, Germany, Kenya, and India. Societal views of disability, classism, racism, and inequitable assessment are among the factors that contribute to disproportionality. Preventative medicine, equitable access to resources, ethical and effective assessment procedures, and educational practices that are gender equitable and culturally responsive may reduce the problem of disproportionality.  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