全文获取类型
收费全文 | 12183篇 |
免费 | 219篇 |
国内免费 | 2篇 |
专业分类
管理学 | 1568篇 |
民族学 | 72篇 |
人才学 | 3篇 |
人口学 | 1099篇 |
丛书文集 | 74篇 |
理论方法论 | 1248篇 |
综合类 | 234篇 |
社会学 | 6450篇 |
统计学 | 1656篇 |
出版年
2021年 | 61篇 |
2020年 | 191篇 |
2019年 | 291篇 |
2018年 | 313篇 |
2017年 | 435篇 |
2016年 | 293篇 |
2015年 | 229篇 |
2014年 | 285篇 |
2013年 | 2037篇 |
2012年 | 397篇 |
2011年 | 389篇 |
2010年 | 303篇 |
2009年 | 292篇 |
2008年 | 296篇 |
2007年 | 334篇 |
2006年 | 311篇 |
2005年 | 313篇 |
2004年 | 309篇 |
2003年 | 209篇 |
2002年 | 253篇 |
2001年 | 307篇 |
2000年 | 243篇 |
1999年 | 232篇 |
1998年 | 186篇 |
1997年 | 177篇 |
1996年 | 165篇 |
1995年 | 154篇 |
1994年 | 163篇 |
1993年 | 163篇 |
1992年 | 160篇 |
1991年 | 169篇 |
1990年 | 168篇 |
1989年 | 164篇 |
1988年 | 145篇 |
1987年 | 163篇 |
1986年 | 123篇 |
1985年 | 158篇 |
1984年 | 165篇 |
1983年 | 157篇 |
1982年 | 130篇 |
1981年 | 99篇 |
1980年 | 119篇 |
1979年 | 116篇 |
1978年 | 111篇 |
1977年 | 89篇 |
1976年 | 95篇 |
1975年 | 102篇 |
1974年 | 96篇 |
1973年 | 74篇 |
1972年 | 64篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
951.
952.
SUMMARY An optimization problem which provides a new characterization for ridge regression is discussed. A variant of this optimization problem leads to a new family of biased estimators that includes the Stein estimation method and principal components regression as particular cases. The whole approach is illustrated on the basis of real data sets. 相似文献
953.
In France, the new Common Agricultural Policy will have different regional impacts. There are three types of regions based on agricultural development. The first type is where farms are able to carry on a modernization process; the second type where farms are threatened in spite of their modernization, and the third type where farms are unable to be modernized. These three types of regions are represented in France by Picardy, Languedoc and Savoy. Each region is developing a particular form of pluriactivity in accordance with its own agricultural development. Picardy is setting up a business pluriactivity which uses agricultural resources to increase non-agricultural activities. Languedoc undergoes a rural development pluriactivity by using non-agricultural resources for its modernization. Savoy represents a rural pluriactivity of survival, in which the close combination between agricultural and non-agricultural activities permits the maintenance of rural many-faceted businesses.The three kinds of pluriactivity are very unlike. They show that, in France, agricultural development will in future be linked to rural development to a far greater extent. 相似文献
954.
This article traces the progression of American Indian Studies programs and the discipline's evolution in academia. Our research is divided into three sections. The first describes the era of the turbulent 1960s, when programs began and struggled to assert themselves as worthy of independent intellectual status. The second part focuses on American Indian studies programs' efforts to continue maturing as an interdisciplinary field of inquiry. This section includes a discussion of the evolving methods, theories, and concepts used for analysis and research concerning the diversity of American Indian cultures. There were certain structural, personnel, and curriculum problems which presented themselves along the road to academic maturity, some of which remain. The final section suggests characteristics necessary for an ideal American Indian studies program into the 21st century. 相似文献
955.
Audrey Block G. Nicholas Braucht Richard Crispino Robert E. Drake Susan M. Essock Richard Hough Michael W. Kirby Claudia Krueger Jon Nachison Marjorie Robertson Stanley Sacks Graham Staines 《Journal of Social Distress and the Homeless》1997,6(4):261-274
The Collaborative Demonstration Program for Homeless Individuals is providing an opportunity for several community agencies in the United States to explore innovative intervention and treatment strategies to address the needs of homeless people with co-occurring (mental illness and substance abuse) disorders. This cooperative agreement, funded jointly by the Center for Mental Health Services (CMHS) and the Center for Substance Abuse Treatment (CSAT), is a $3 million project supporting programs in various community agencies to develop, document, and evaluate programs for persons who are homeless with co-occurring disorders to be used as models in other communities. The program models include: Assertive Community Treatment, Psychosocial Rehabilitation, Therapeutic Community, and an integrated treatment model. The first phase of the two-phase project funded 16 programs in the U.S. to develop manuals within their primary treatment modalities for homeless people with co-occurring disorders. For Phase II of the project, six of the 16 model programs were competitively selected to demonstrate program impact through formal program evaluation efforts. The data derived from the various projects will be compiled into a compendium of information for state agencies and community service providers throughout the U.S. 相似文献
956.
The article provides evidence that there is a relationship between government debt and interest rates via the demand for money. This relationship is examined through the wealth effect of government debt on money demand, and the robustness of the results is tested by the use of extreme bound analysis in addition to standard econometric techniques. We find that OLS regression shows government debt fnfecting the demand for money positively, implying that Federal government debt is net wealth. In addition, the extreme bound analysis shows that the estimates of the government debt coefficient are robust under alternative specifications of the Goldfeld model. 相似文献
957.
Intergenerational relations among in-laws are involuntary ties emerging as a consequence of marriage. As such, these relations provide a window through which the dynamics involved in restructuring social networks following life transitions may be observed. A questionnaire, based on the social convoy model, was given to an ethnically diverse sample of adults with living in-laws (N = 170), married 2–15 years. About half of the respondents included in-laws in a concentric circle network diagram of persons close and important to them. The strongest unique predictors of convoy placement for the mother-in-law were support, frequency of contact, relationship quality, and length of marriage, and for the father-in-law were support, relationship quality, and value similarity. This study sheds light on the dynamics of an intergenerational relationship that has been largely ignored in the literature, laying the groundwork for conceptualizing ways to foster positive in-law relationships as a necessary tool in managing the care of the growing numbers of elderly in the new millennium. 相似文献
958.
SUMMARY. Three one day workshops for 40 senior clinical staff were held to introduce a new Operational Policy on Child Sexual Abuse (CSA) and to provide them with a teaching package to enable them to run ‘cascade’ teaching sessions for other staff and colleagues. Part I of this paper describes an evaluation of the workshop; Part II describes an evaluation of the cascade The workshop evaluation showed that knowledge about CSA and policy issues was already good, but although that knowledge did improve after the workshop, attitudes about sexual behaviour were not changed by the workshop. Evaluation of the cascade also showed an increase in knowledge after the dissemination exercise 相似文献
959.
960.