全文获取类型
收费全文 | 9514篇 |
免费 | 232篇 |
专业分类
管理学 | 1315篇 |
民族学 | 49篇 |
人才学 | 1篇 |
人口学 | 907篇 |
丛书文集 | 38篇 |
理论方法论 | 812篇 |
综合类 | 307篇 |
社会学 | 4061篇 |
统计学 | 2256篇 |
出版年
2023年 | 50篇 |
2021年 | 62篇 |
2020年 | 119篇 |
2019年 | 174篇 |
2018年 | 235篇 |
2017年 | 327篇 |
2016年 | 280篇 |
2015年 | 190篇 |
2014年 | 231篇 |
2013年 | 1710篇 |
2012年 | 338篇 |
2011年 | 259篇 |
2010年 | 213篇 |
2009年 | 185篇 |
2008年 | 225篇 |
2007年 | 226篇 |
2006年 | 159篇 |
2005年 | 223篇 |
2004年 | 204篇 |
2003年 | 231篇 |
2002年 | 260篇 |
2001年 | 250篇 |
2000年 | 218篇 |
1999年 | 209篇 |
1998年 | 165篇 |
1997年 | 130篇 |
1996年 | 142篇 |
1995年 | 126篇 |
1994年 | 118篇 |
1993年 | 124篇 |
1992年 | 147篇 |
1991年 | 137篇 |
1990年 | 124篇 |
1989年 | 116篇 |
1988年 | 136篇 |
1987年 | 125篇 |
1986年 | 118篇 |
1985年 | 141篇 |
1984年 | 113篇 |
1983年 | 118篇 |
1982年 | 87篇 |
1981年 | 92篇 |
1980年 | 81篇 |
1979年 | 88篇 |
1978年 | 97篇 |
1977年 | 67篇 |
1976年 | 55篇 |
1975年 | 73篇 |
1974年 | 57篇 |
1973年 | 46篇 |
排序方式: 共有9746条查询结果,搜索用时 96 毫秒
931.
932.
This paper proposes several concepts of efficient solutions for multicriteria decision problems under uncertainty. We show how alternative notions of efficiency may be grounded on different decision contexts, depending on what is known about the Decision Maker's (DM) preference structure and probabilistic anticipations. We define efficient sets arising naturally from polar decision contexts. We investigate these sets from the points of view of their relative inclusions and point out some particular subsets which may be especially relevant to some decision situations. 相似文献
933.
For the purpose of describing change in an economy's structure, and addressing issues of transformation, the notion of a time-dependent macroeconomic potential function is introduced. It penalizes deviations from equilibrium (entrepreneurial error) and induces moves toward equilibrium. Thus, from the concept of a potential function is derived the concept of short-term and long-term change forces. We focus here on the long-term structural changes of an economy as distinct from short-term cyclical variations, and we represent economic transformations as phase-transitions between monostable and ambiguous bistable states of the economy. One important feature of the potential function approach is that the parameter of the potential can be determined from empirical data. In particular, the parameters can be regressed for input variables. Hence, a relationship has been established between the structural change force and a set of input variables, some of which are controlled in part by either public or private sector agents. The method has been applied to West German and United States industry data for 1950–1980. 相似文献
934.
935.
936.
A theory of coarse utility 总被引:1,自引:0,他引:1
937.
938.
Social workers are being called upon to utilize a wide range of skills in practice including not only skills of working directly with clients, but also skills related to practice in organizations such as program management, inter-organizational cooperation, research and evaluation. This article describes an innovative geriatric field education program that prepares social workers with leadership skills in both direct service and management, and engages community agencies as both sites for student learning and as beneficiaries of their professional development projects. Case examples are provided and benefits and challenges to the model are discussed. 相似文献
939.
Objective. Although research suggests that national forces can play a role in local and state elections, most of this work has only recently begun to examine the potential role of national forces in state or local ballot initiative or referenda elections. Methods. Our research addresses this gap in the literature by exploring the influence of national forces, such as the timing of elections, Supreme Court rulings, the activities of interest groups, and public opinion, on state direct legislation elections. We incorporate national forces into the morality politics framework and derive specific hypotheses. We then test these hypotheses by conducting a multivariate analysis of county–level voting patterns across 16 abortion–related direct legislation elections. Results. Our results confirm most of the hypotheses derived from the morality politics framework, including those concerning the role of national forces. Conclusions. Voting patterns on abortion tend to be influenced by the presence of presidential elections, Supreme Court rulings, interest–group activity, public opinion, partisanship, college education, and conservative religious forces. We discuss the implications of our findings for research on elections, abortion policy, and morality politics. 相似文献
940.
经济科学都是以经济活动及其关系作为自己的研究对象的 ;虽然在近 2 0年来经济活动发生了向其他领域的“延伸” ,但它本身的“经济”意义并没有丧失。因此还需要坚定地把握经济活动及其关系对各门具体经济学科所具有的这种统一性。 相似文献