全文获取类型
收费全文 | 564篇 |
免费 | 20篇 |
国内免费 | 1篇 |
专业分类
管理学 | 43篇 |
民族学 | 1篇 |
人才学 | 1篇 |
人口学 | 124篇 |
丛书文集 | 1篇 |
理论方法论 | 69篇 |
综合类 | 3篇 |
社会学 | 292篇 |
统计学 | 51篇 |
出版年
2023年 | 4篇 |
2021年 | 9篇 |
2020年 | 9篇 |
2019年 | 20篇 |
2018年 | 28篇 |
2017年 | 21篇 |
2016年 | 32篇 |
2015年 | 22篇 |
2014年 | 23篇 |
2013年 | 90篇 |
2012年 | 28篇 |
2011年 | 19篇 |
2010年 | 21篇 |
2009年 | 10篇 |
2008年 | 8篇 |
2007年 | 23篇 |
2006年 | 17篇 |
2005年 | 27篇 |
2004年 | 19篇 |
2003年 | 10篇 |
2002年 | 9篇 |
2001年 | 8篇 |
2000年 | 9篇 |
1999年 | 6篇 |
1998年 | 5篇 |
1997年 | 6篇 |
1996年 | 5篇 |
1995年 | 7篇 |
1994年 | 4篇 |
1993年 | 6篇 |
1992年 | 6篇 |
1991年 | 3篇 |
1990年 | 2篇 |
1989年 | 7篇 |
1988年 | 5篇 |
1987年 | 2篇 |
1986年 | 6篇 |
1985年 | 7篇 |
1983年 | 5篇 |
1982年 | 5篇 |
1980年 | 4篇 |
1979年 | 5篇 |
1977年 | 2篇 |
1976年 | 3篇 |
1974年 | 4篇 |
1973年 | 1篇 |
1972年 | 3篇 |
1971年 | 3篇 |
1970年 | 1篇 |
1969年 | 1篇 |
排序方式: 共有585条查询结果,搜索用时 484 毫秒
81.
82.
83.
84.
Risk assessments for carcinogens are being developed through an accelerated process in California as a part of the state's implementation of Proposition 65, the Safe Drinking Water and Toxic Enforcement Act. Estimates of carcinogenic potency made by the California Department of Health Services (CDHS) are generally similar to estimates made by the U.S. Environmental Protection Agency (EPA). The largest differences are due to EPA's use of the maximum likelihood estimate instead of CDHS' use of the upper 95% confidence bounds on potencies derived from human data and to procedures used to correct for studies of short duration or with early mortality. Numerical limits derived from these potency estimates constitute "no significant risk" levels, which govern exemption from Proposition 65's discharge prohibition and warning requirements. Under Proposition 65 regulations, lifetime cancer risks less than 10(-5) are not significant and cumulative intake is not considered. Following these regulations, numerical limits for a number of Proposition 65 carcinogens that are applicable to the control of toxic discharges are less stringent than limits under existing federal water pollution control laws. Thus, existing federal limits will become the Proposition 65 levels for discharge. Chemicals currently not covered by federal and state controls will eventually be subject to discharge limitations under Proposition 65. "No significant risk" levels (expressed in terms of daily intake of carcinogens) also trigger warning requirements under Proposition 65 that are more extensive than existing state or federal requirements. A variety of chemical exposures from multiple sources are identified that exceed Proposition 65's "no significant risk" levels. 相似文献
85.
Previous research generally has supported multiple discrepancies theory (MDT) of the processes by which individuals arrive at judgments of satisfaction with various aspects of their lives as well as with life overall. However, the nature of possible causal relationships between overall and life facet satisfaction has been ignored. The purpose of this study was to extend MDT by testing alternative theoretical models which specified Bottom-up, Top-Down, and Bidirectional relationships between overall life satisfaction and satisfaction with 11 life facets in a sample of 1354 U.S. college students. Results most strongly favored the Bidirectional model in which the overall — life facet satisfaction relationship varied across life domains. The need to identify boundary conditions which determine the direction of the overall — life facet satisfaction relationship is discussed. 相似文献
86.
In longshoring, technological change, expanding competition among ports, and the development of lower cost work forces induced
a major restructuring of dock operations. This paper focuses on collective bargaining responses to environmental change and
the interplay between those responses, government intervention, the law, and market forces. Four coastal regions in the United
States and Canada are studied to gain a broad perspective in two jurisdictions with somewhat differing approaches to government
intervention and labor law. Market pressures have become a dominant force, altering the need for and nature of government
intervention, and accommodation to change seems most appropriate in today’s highly competitive marketplace.
We are indebted to those we interviewed: Brian Ciccozzi, D. P. (Don) Garcia, Terry Lane, Arnold E. Masters, Gene Vrana, Greg
Storey, Joe Weiler, and R. V. Wilds. We greatly appreciate the comments of Vitor Marciano, Yoni Reshef, and an anonymous referee,
as well as the support of the Social Sciences and Humanities Research Council and the Rice Fellowship.
I thank the Oakland University Research Committee for grant support. 相似文献
87.
An inverse Gaussian mixture of Poisson distributions(the P-IG distribution) is considered as a model for species abundance data,, Minimum chi-square and maximum likelihood methods of estimation for the zero-truncated P-IG distribution are developed, Ihe performance of the P-IG distribution is illustrated and discussed for several well-known sets of insect abundance data. 相似文献
88.
89.
90.
Osei-Kojo Alex Bawole Justice Nyigmah Sakyi Emmanuel Kojo 《Public Organization Review》2020,20(3):495-510
Public Organization Review - This article synthesizes current insights about the opportunities and constraints to collaborative public management. Despite the swath of research on... 相似文献