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   21503篇
  免费   308篇
  国内免费   1篇
管理学   2931篇
民族学   119篇
人口学   1824篇
丛书文集   80篇
教育普及   1篇
理论方法论   1934篇
综合类   201篇
社会学   10684篇
统计学   4038篇
  2023年   158篇
  2022年   97篇
  2021年   159篇
  2020年   417篇
  2019年   606篇
  2018年   649篇
  2017年   842篇
  2016年   644篇
  2015年   445篇
  2014年   615篇
  2013年   3738篇
  2012年   791篇
  2011年   731篇
  2010年   549篇
  2009年   447篇
  2008年   586篇
  2007年   535篇
  2006年   563篇
  2005年   453篇
  2004年   463篇
  2003年   390篇
  2002年   403篇
  2001年   503篇
  2000年   443篇
  1999年   436篇
  1998年   336篇
  1997年   290篇
  1996年   292篇
  1995年   308篇
  1994年   270篇
  1993年   267篇
  1992年   310篇
  1991年   308篇
  1990年   301篇
  1989年   260篇
  1988年   260篇
  1987年   213篇
  1986年   245篇
  1985年   262篇
  1984年   232篇
  1983年   206篇
  1982年   169篇
  1981年   150篇
  1980年   170篇
  1979年   182篇
  1978年   144篇
  1977年   119篇
  1976年   95篇
  1975年   100篇
  1974年   98篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
991.
ABSTRACT

For all youth, adolescence is a time of great change, marked by multiple transitions. For those with disabilities, these transitions can be especially challenging for the youth and their families. Although families of adolescents with disabilities often require support, it is unclear what types of assistance are most helpful. To understand the responsibilities of and, correspondingly, supports needed for parents and siblings, the authors conducted a comprehensive literature review. Specifically, the authors examined the literature to identify the supports that families provide to their adolescent relatives with disabilities, the impacts of caring for an adolescent relative with a disability, and the assistance that families receive. The authors conclude by discussing implications for future research about family support.  相似文献   
992.
Welfare reform was examined for 39 Michigan families whose children have significant health or intellectual and behavioral disabilities. As a group, these families received little specialized assistance or services to address their unique needs. Family-cited barriers to self-sufficiency included poorly trained welfare caseworkers, limited public transportation, and inadequate child care. Having an older child was the only discriminating variable between working and non-working mothers. However, working mothers only had temporary positions with no benefits and low pay. All families, whether employed or not, lived below the poverty line.  相似文献   
993.
994.
Survey statisticians make use of auxiliary information to improve estimates. One important example is calibration estimation, which constructs new weights that match benchmark constraints on auxiliary variables while remaining “close” to the design weights. Multiple-frame surveys are increasingly used by statistical agencies and private organizations to reduce sampling costs and/or avoid frame undercoverage errors. Several ways of combining estimates derived from such frames have been proposed elsewhere; in this paper, we extend the calibration paradigm, previously used for single-frame surveys, to calculate the total value of a variable of interest in a dual-frame survey. Calibration is a general tool that allows to include auxiliary information from two frames. It also incorporates, as a special case, certain dual-frame estimators that have been proposed previously. The theoretical properties of our class of estimators are derived and discussed, and simulation studies conducted to compare the efficiency of the procedure, using different sets of auxiliary variables. Finally, the proposed methodology is applied to real data obtained from the Barometer of Culture of Andalusia survey.  相似文献   
995.
Although increasingly appreciated for their explanatory power in developed societies, marital search models have yet to be widely applied to developing nations. This article evaluates the applicability of marital search models to marriage timing in Mexico. The analysis compares separate models of union formation for men and women that include individual and marriage market predictors. Results show that union formation is closely linked to the uncertainties surrounding the transition to adulthood and the availability of marriageable partners. Improvements in women's economic position do not diminish the attractiveness of marriage, as female independence arguments would suggest. Instead, they are a central force behind the stability of marriage behavior in Mexico. A central transformation identified in the analysis is the reduction in sex differences in age at marriage as women expand their education and labor force participation.  相似文献   
996.
The Ago General Hospital in Legaspi City of the Philippines was opened in 1965, antedating the national family planning movement by 5 years. The 180 bed hospital integrates family planning into the overall hospital service; sterilization is the main method used. Of the 3600 patients per year, 15% are family planning acceptors. The hospital employs 3 family planning strategies: inhospital, out patient and supportive. Inhospital strategies center on sterilization counseling and motivation. The counseling sessions include patient education. Primary targets include high risk pregnancies and young couples with a lot of children. Outpatient strategies include a referral system involving hospitals and agencies with family planning programs, lectures for community organizations and personal visits to other clinics and rural health units. The hospital's mobile clinic, staffed mainly by students, provides information, deworming, and pediatric services to the community. Supportive program strategies consist of mass communication, and an acceptor's club for previous acceptors of sterilization. These clubs meet regularly to share and discuss experiences.  相似文献   
997.
This paper reports the results of three studies designed to test the nomological validity of a consumer well-being (CWB) measure in relation to personal transportation. The CWB measure was developed guided by the theoretical notion that the CWB in relation to personal transportation vehicles is significantly enhanced when the consumption of the vehicle meets the full spectrum of human developmental needs (i.e., safety, economic, family, social, esteem, actualization, knowledge, and aesthetics needs). The nomological validity of the CWB measure was tested by exploring the various antecedents and consequences of the construct. This was done in three separate studies in which the results of one study prompted further conceptual development and additional testing. The overall findings of the three studies provided support for the nomological validity of the CWB measure.  相似文献   
998.
During the apartheid era black South Africans indicated markedly lower levels of happiness and satisfaction in all spheres of life than their white counterparts. The gap between black and white subjective well-being closed temporarily after the first universal franchise elections held on April 27, 1994 only to widen again eighteen months later. The paper presents data on subjective well-being collected during the 1980s and 1990s in four nationwide cross-sectional attitude surveys and a multipurpose household survey. Possible explanations for the shifting levels of happiness are explored. These include levels of living, income inequality, rising expectations and new anxieties experienced in the post-apartheid era.  相似文献   
999.
We identify a new monotonicity condition (called cover monotonicity) for tournament solutions which allows a discrimination among main tournament solutions: The top-cycle, the iterated uncovered set, the minimal covering set, and the bipartisan set are cover monotonic while the uncovered set, Banks set, the Copeland rule, and the Slater rule fail to be so. As cover monotonic tournament solutions induce social choice rules which are Nash implementable in certain non-standard frameworks (such as those set by Bochet and Maniquet (CORE Discussion Paper No. 2006/84, 2006) or Özkal-Sanver and Sanver (Social Choice and Welfare, 26(3), 607–623, 2006), the discrimination generated by cover monotonicity becomes particularly notable when implementability is a concern.  相似文献   
1000.
The process of conceptualizing and implementing significant change in complex organizations can be aided greatly through ‘future state visioning’, a set of processes for determining what and where you want to be by a future date. After developing ideas about the nature of the future environment facing the organization and the stakeholders who will be significant at that time, executives can articulate the values and principles which should guide actions leading to the future state vision. Examples from three organizations are used to illustrate the steps for successful use of the future state visioning procedure.  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