全文获取类型
收费全文 | 2588篇 |
免费 | 53篇 |
专业分类
管理学 | 417篇 |
民族学 | 21篇 |
人才学 | 1篇 |
人口学 | 213篇 |
丛书文集 | 23篇 |
理论方法论 | 219篇 |
综合类 | 24篇 |
社会学 | 1371篇 |
统计学 | 352篇 |
出版年
2021年 | 13篇 |
2020年 | 26篇 |
2019年 | 30篇 |
2018年 | 52篇 |
2017年 | 66篇 |
2016年 | 55篇 |
2015年 | 34篇 |
2014年 | 53篇 |
2013年 | 487篇 |
2012年 | 60篇 |
2011年 | 88篇 |
2010年 | 68篇 |
2009年 | 61篇 |
2008年 | 64篇 |
2007年 | 87篇 |
2006年 | 56篇 |
2005年 | 68篇 |
2004年 | 61篇 |
2003年 | 63篇 |
2002年 | 56篇 |
2001年 | 44篇 |
2000年 | 43篇 |
1999年 | 39篇 |
1998年 | 50篇 |
1997年 | 55篇 |
1996年 | 49篇 |
1995年 | 51篇 |
1994年 | 39篇 |
1993年 | 48篇 |
1992年 | 46篇 |
1991年 | 45篇 |
1990年 | 41篇 |
1989年 | 31篇 |
1988年 | 30篇 |
1987年 | 35篇 |
1986年 | 26篇 |
1985年 | 32篇 |
1984年 | 32篇 |
1983年 | 39篇 |
1982年 | 33篇 |
1981年 | 30篇 |
1980年 | 29篇 |
1979年 | 26篇 |
1978年 | 34篇 |
1977年 | 17篇 |
1976年 | 25篇 |
1975年 | 20篇 |
1974年 | 25篇 |
1973年 | 10篇 |
1971年 | 11篇 |
排序方式: 共有2641条查询结果,搜索用时 93 毫秒
31.
We consider the problem of estimating the scale parameter of an exponential or a gamma distribution under squared error loss when the scale parameter θ is known to be greater than some fixed value θ0. Natural estimators in this setting include truncated linear functions of the sufficient statistic. Such estimators are typically inadmissible, but explicit improvements seem difficult to find. Some are presented here. A particularly interesting finding is that estimators which are admissible in the untruncated problem which take values only in the interior of the truncated parameter space are found to be inadmissible for the truncated problem. 相似文献
32.
Knowledge is a vital source of competitive advantage and renewal for contemporary organizations. However, to date, few studies have scrutinized how mergers and acquisitions (M&As)—processes dependent on knowledge sharing—offer a valuable inter-organizational context through which to understand the attainment of customer knowledge sharing following M&As. Applying an integrated theoretical perspective from customer relationship management and M&A performance research, we study a Chinese–Finnish acquisition and customer firms of the acquired party across four advanced Western countries. We find that customer knowledge sharing is an active relationship management process that relies on the factors of customer dedication-based motivation vs. customer concerns about M&As to maintain relationships after acquisitions. In addition, and more importantly, we find that the promise management mechanisms—making promises, enabling promises, and keeping promises—of the M&A parties reinforce the motivational factors to maintain customer knowledge sharing in cross-border M&As. We propose a conceptual framework of customer knowledge sharing in cross-border M&As. 相似文献
33.
34.
Robert Aslett Robert J. Buck Steven G. Duvall Jerome Sacks & William J. Welch 《Journal of the Royal Statistical Society. Series C, Applied statistics》1998,47(1):31-48
In electrical engineering, circuit designs are now often optimized via circuit simulation computer models. Typically, many response variables characterize the circuit's performance. Each response is a function of many input variables, including factors that can be set in the engineering design and noise factors representing manufacturing conditions. We describe a modelling approach which is appropriate for the simulator's deterministic input–output relationships. Non-linearities and interactions are identified without explicit assumptions about the functional form. These models lead to predictors to guide the reduction of the ranges of the designable factors in a sequence of experiments. Ultimately, the predictors are used to optimize the engineering design. We also show how a visualization of the fitted relationships facilitates an understanding of the engineering trade-offs between responses. The example used to demonstrate these methods, the design of a buffer circuit, has multiple targets for the responses, representing different trade-offs between the key performance measures. 相似文献
35.
We draw upon evidence from a qualitative study of headhunters to provide insights into the character and importance of candidate fit and skill for the selection of a broad range of white-collar employees. Headhunters suggest that the fit of a job candidate is assessed at two levels, one corresponding with a general compatibility with organization-level norms, culture, and strategy, the other corresponding more closely with traits and characteristics of the person or persons with whom the job candidate actually interviews. Skill—a factor which is largely neglected by those who tout the importance of fit—also plays an important and independent role in employee selection. Stalls that influence the selection of employees from a pool of candidates tend to be highly specific if not idiosyncratic, and take the form of what headhunters call hot buttons. We conclude by discussing the conceptualization, causes, and implications of fit; we also consider how the importance of fit and hot buttons challenges the explanatory logic of standard accounts of labor-market success. 相似文献
36.
37.
The paradox of multiple elections 总被引:1,自引:0,他引:1
Assume that voters must choose between voting yes (Y) and voting no (N) on three propositions on a referendum. If the winning
combination is NYY on the first, second, and third propositions, respectively, the paradox of multiple elections is that NYY can receive the fewest votes of the 23 = 8 combinations. Several variants of this paradox are illustrated, and necessary and sufficient conditions for its occurrence,
related to the “incoherence” of support, are given.
The paradox is shown, via an isomorphism, to be a generalization of the well-known paradox of voting. One real-life example
of the paradox involving voting on propositions in California, in which not a single voter voted on the winning side of all
the propositions, is given. Several empirical examples of variants of the paradox that manifested themselves in federal elections
– one of which led to divided government – and legislative votes in the US House of Representatives, are also analyzed. Possible
normative implications of the paradox, such as allowing voters to vote directly for combinations using approval voting or
the Borda count, are discussed.
Received: 31 July 1996 / Accepted: 1 October 1996 相似文献
38.
39.
William F. Northey Vicky Primer Lisa Christensen 《Child and Adolescent Social Work Journal》1997,14(1):5-22
Caught between their child and doing the right thing, families of chronic juvenile delinquents often experience a series of injustices in the name of justice. Attempts by the system to correct the delinquency problem often result in the imposition of values and beliefs that negate the family's values, experiences and meanings of their child's behavior. The Ecosystemic Natural Wrap-around (E.N.W.) model attempts to respectfully account for the many influences that maintain problematic interactions, both internal and external, in the nuclear family of chronic juvenile delinquents. The model focuses on a variety of interventions at different levels and contexts, building on the strengths of the family, using the extended family and fictive kin networks, and clarifying the meanings associated with problematic behavior for the multiple players. The model proposed is an integrative theoretical approach, emphasizing systems theory and constructivism. 相似文献
40.
Sarah E. Turner Thomas I. Nygren William G. Bowen 《Voluntas: International Journal of Voluntary and Nonprofit Organizations》1993,4(1):73-94
An analysis of the field of higher education reveals a surprisingly large number of classification errors within the (US) National Taxonomy of Exempt Entities database. Of the nearly 4,000 non-profit entities coded within the universe of institutions of higher education, we estimate that approximately 60 per cent were incorrectly included (Type II errors). Institutions incorrectly excluded from the higher education universe (Type I errors) represent roughly 10 per cent of the institutions coded correctly. These errors result primarily from assigning codes on the basis of the names of organisations (for example, College Park Towers is classified as a college, when it is in fact a housing complex for senior citizens) and from trying too hard to assign codes in ambiguous situations. The consequences can be significant for the users of these data, and we recommend raising bright warning flags while simultaneously enlisting the help of the entire non-profit sector in improving the classification coding process.The authors are with The Andrew W. Mellon Foundation. In addition to our colleagues on the staff of the Foundation, we wish to thank Helmut Anheier, Ted Bozovich, Harvey Dale, Virginia Hodgkinson, Stephen Noga and Christopher Toppe for helpful suggestions. 相似文献