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   19173篇
  免费   527篇
  国内免费   1篇
管理学   2782篇
民族学   70篇
人才学   1篇
人口学   1876篇
丛书文集   79篇
教育普及   2篇
理论方法论   1729篇
现状及发展   1篇
综合类   258篇
社会学   9365篇
统计学   3538篇
  2021年   112篇
  2020年   278篇
  2019年   377篇
  2018年   445篇
  2017年   607篇
  2016年   480篇
  2015年   349篇
  2014年   460篇
  2013年   3003篇
  2012年   635篇
  2011年   614篇
  2010年   448篇
  2009年   374篇
  2008年   445篇
  2007年   463篇
  2006年   454篇
  2005年   441篇
  2004年   406篇
  2003年   378篇
  2002年   419篇
  2001年   520篇
  2000年   529篇
  1999年   460篇
  1998年   341篇
  1997年   313篇
  1996年   327篇
  1995年   301篇
  1994年   288篇
  1993年   289篇
  1992年   342篇
  1991年   317篇
  1990年   287篇
  1989年   290篇
  1988年   290篇
  1987年   251篇
  1986年   243篇
  1985年   278篇
  1984年   267篇
  1983年   251篇
  1982年   215篇
  1981年   180篇
  1980年   164篇
  1979年   195篇
  1978年   176篇
  1977年   159篇
  1976年   135篇
  1975年   157篇
  1974年   118篇
  1973年   115篇
  1972年   94篇
排序方式: 共有10000条查询结果,搜索用时 237 毫秒
871.
872.
This study investigated the association between sexual practices and duration of a sexual encounter. Using data from a population-based computer-assisted telephone survey of 8,656 Australians aged 16 to 64 years, four distinct patterns of sexual practices among respondents were found: "basic sexual encounter" (involving mainly kissing, cuddling, stroking one's partner and being stroked, and vaginal intercourse), "basic sexual encounter plus oral sex," "all assessed sexual practices" (all sexual behaviors included in the survey), and "mainly vaginal intercourse" (characterized by lower levels of kissing, cuddling, and stroking). For both men and women, respondents classified in the basic sexual encounter plus oral sex, and all assessed sexual practices clusters reported significantly longer durations than those in the basic sexual encounter group, whereas respondents in the mainly vaginal intercourse cluster reported shorter durations. These differences were found even after allowing for demographic differences in sexual duration-specifically, age and partner type of the most recent opposite-sex partner. These findings add to the understanding of what typically happens in a sexual encounter. Overall, longer sexual encounters appear to be associated with the inclusion of the least common sexual practices-namely, oral sex and self-stimulation.  相似文献   
873.
Data from one urban school district is analyzed to examine equity‐based arguments about school choice as they pertain to intradistrict transfer policies. We specifically examine which factors influence the propensity for parents to participate in choice, and how choice schools differ from the schools that students are zoned to attend. We find that advantaged and disadvantaged parents make similar choices in that they are both likely to choose more affluent schools with better academic records than the schools they are zoned to attend. However, these choices operate in different spheres, as advantaged parents choose the most affluent schools with the best academic records, and disadvantaged parents choose away from the least affluent schools with the worst academic records to schools that are slightly better.  相似文献   
874.
Small Steps are Easier Together (SS) was a pilot environmental intervention in small rural worksites in Upstate New York in collaboration with Extension educators. Worksite leaders teamed with co-workers to select and implement environmental changes to increase walking steps over individual baseline and to choose healthy eating options over 10 weeks. Participants were 226 primarily white, women employees in 5 sites. A mixed methods process evaluation, conducted to identify determinants of intervention effectiveness and to explain differences in outcomes across worksites, included surveys, self-reports of walking and eating, interviews, focus groups, and an intervention log. The evaluation assessed reach, characteristics of recruited participants, dose delivered, dose received, and context and compared sites on walking and eating outcomes. Emergent elements of participant-reported dose received included: active leadership, visible environmental changes, critical mass of participants, public display of accomplishments, accountability to co-workers, and group decision making. Participants at sites with high reach and dose were significantly more likely than sites with low reach and dose to achieve intervention goals. Although this small pilot needs replication, these findings describe how these evaluation methods can be applied and analyzed in an environmental intervention and provide information on trends in the data.  相似文献   
875.
We propose a procedure for dividing a set of indivisible items between two players. We assume that each player’s preference over subsets of items is consistent with a strict ranking of the items, and that neither player has information about the other’s preferences. Our procedure ensures an envy-free division—each player receives a subset of items that it values more than the other player’s complementary subset—given that an envy-free division of “contested items,” which the players would choose at the same time, is possible. We show that the possibility of one player’s undercutting the other’s proposal, and implementing the reduced subset for himself or herself, makes the proposer “reasonable,” and generally leads to an envy-free division, even when the players rank items exactly the same. Although the undercut procedure is manipulable and its envy-free allocation may be Pareto-inferior, each player’s maximin strategy is to be truthful. Applications of the procedure are discussed briefly.  相似文献   
876.
This article examines how conflict in the country of origin interacts with other factors in shaping migrants’ remittance‐sending practices. Our data come from a survey of 10 immigrant groups in Norway and semi‐structured interviews with Somali and Pakistani remittance‐senders and receivers. First, we conduct an in‐depth comparison to explore the differences in how Somali and Pakistani migrants decide about remittance‐sending. Second, we use survey data on all 10 migrant groups to evaluate whether the differences that are not explained by socioeconomic characteristics, may partly reflect whether or not there is ongoing conflict in the country of origin. In our analyses we differentiate between (1) the effect of migrants’capacity to remit and their prioritizing of local and transnational expenditures, and (2) the impact of state collapse and absence of human security on migrants’ and refugees’desire to remit. We find that ongoing conflict in the country of origin exerts an upward pressure on remittance‐sending.  相似文献   
877.
In this paper, we explore how individual women cope with the tensions between economic forces encouraging temporary labour migration and cultural norms tying “proper” women to their homes and families. Combining in‐depth interviews with returned migrant women in the Georgian capital of Tbilisi with secondary migration data for the region, we illustrate the recent increases in Georgian women’s participation in international labour migration. Deteriorating economic conditions in Georgia leave women with few local opportunities to financially support their families, while institutional changes have altered the accessibility and attractiveness of international destinations, leading to increasing motivations and opportunities for women’s migration. Focusing on the contradictions between growing female migration and persistent adherence to cultural norms stigmatizing migration in Georgia, we explore the cognitive strategies migrant women employ in an attempt to balance internalized perceptions of acceptable gendered behaviour with their migration choices. Two key pathways of adaptation emerge: framing migration as a necessity rather than a choice and stressing the unique and individually exceptional nature of their own migration experience. We posit that these strategies may serve to limit the norm‐challenging nature of women’s migration in Georgia. Although migration is often described as an empowering experience for women, if women migrants work to present their migration in a way that fits within the bounds of traditional gender norms, these norms may be strengthened rather than challenged.  相似文献   
878.
Blending high-quality and rigorous research with pure evaluation practice can often be best accomplished through thoughtful collaboration. The evaluation of a high school drug prevention program (All Stars Senior) is an example of how perceived competing purposes and methodologies can coexist to investigate formative and summative outcome variables that can be used for program improvement. Throughout this project there were many examples of client learning from evaluator and evaluator learning from client. This article presents convincing evidence that collaborative evaluation can improve the design, implementation, and findings of the randomized control trial. Throughout this paper, we discuss many examples of good science, good evaluation, and other practical benefits of practicing collaborative evaluation. Ultimately, the authors created the term pre-formative evaluation to describe the period prior to data collection and before program implementation, when collaborative evaluation can inform program improvement.  相似文献   
879.
This review of controlled studies of marital and family therapy (MFT) in alcoholism treatment updates the earlier review by O'Farrell and Fals-Stewart (2003). We conclude that, when the alcoholic is unwilling to seek help, MFT is effective in helping the family cope better and motivating alcoholics to enter treatment. Specifically, both Al-Anon facilitation and referral and spouse coping skills training (based on new findings) help family members cope better, and CRAFT promotes treatment entry and was successfully transported to a community clinic in a new study. Once the alcoholic enters treatment, MFT, particularly behavioral couples therapy (BCT), is clearly more effective than individual treatment at increasing abstinence and improving relationship functioning. New BCT studies showed efficacy with women alcoholics and with gay and lesbian alcoholics, and BCT was successfully transported to a community clinic, a brief BCT version was tested, and BCT was adapted for family members other than spouses. Future studies should evaluate the following: MFT with couples where both members have a current alcohol problem and with minority patients, mechanisms of change, transportability of evidence-based MFT approaches to clinical practice settings, and replication of MFT outcomes of reduced partner violence and improved child functioning.  相似文献   
880.
The overarching aim of this article is to review the research on relationship education programs and approaches that has been published or accepted for publication since the last review article in 2003. This article provides a critical overview of the relationship education field and sets an agenda for research and practice for the next decade. A theme weaved throughout the article is the ways in which relationship education is similar and different from couples therapy, and we conclude that there can be a synergistic, healthy marriage between the two. We then provide recommendations for future directions for research in the relationship education field. Finally, the coauthors comment on our experiences in both the relationship education field and the couples therapy field as both researchers and interventionists.  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