全文获取类型
收费全文 | 544篇 |
免费 | 13篇 |
专业分类
各国政治 | 37篇 |
工人农民 | 27篇 |
世界政治 | 94篇 |
外交国际关系 | 35篇 |
法律 | 232篇 |
中国政治 | 4篇 |
政治理论 | 120篇 |
综合类 | 8篇 |
出版年
2023年 | 3篇 |
2021年 | 3篇 |
2020年 | 4篇 |
2019年 | 12篇 |
2018年 | 16篇 |
2017年 | 16篇 |
2016年 | 19篇 |
2015年 | 13篇 |
2014年 | 20篇 |
2013年 | 108篇 |
2012年 | 11篇 |
2011年 | 17篇 |
2010年 | 19篇 |
2009年 | 14篇 |
2008年 | 13篇 |
2007年 | 19篇 |
2006年 | 10篇 |
2005年 | 13篇 |
2004年 | 12篇 |
2003年 | 12篇 |
2002年 | 12篇 |
2001年 | 10篇 |
2000年 | 14篇 |
1999年 | 10篇 |
1998年 | 4篇 |
1997年 | 10篇 |
1996年 | 8篇 |
1995年 | 9篇 |
1994年 | 10篇 |
1993年 | 6篇 |
1992年 | 4篇 |
1991年 | 9篇 |
1990年 | 8篇 |
1989年 | 7篇 |
1988年 | 5篇 |
1986年 | 4篇 |
1985年 | 5篇 |
1984年 | 3篇 |
1983年 | 3篇 |
1982年 | 6篇 |
1981年 | 4篇 |
1980年 | 7篇 |
1979年 | 7篇 |
1978年 | 6篇 |
1976年 | 4篇 |
1975年 | 4篇 |
1974年 | 5篇 |
1973年 | 4篇 |
1972年 | 3篇 |
1967年 | 3篇 |
排序方式: 共有557条查询结果,搜索用时 15 毫秒
71.
72.
William D. White 《Law and human behavior》1983,7(2-3):157-170
Economic models of regulation suggest that the introduction of regulation is closely linked to the magnitude and distribution of costs and benefits anticipated by various groups and their costs of action. This paper draws on economic models to examine the development of systems of professional regulation in nursing since the end of the 19th century. It concludes that changes in supply and demand conditions and labor market organization have played a major role in the introduction of voluntary and mandatory licensure laws for registered and practical nurses. 相似文献
73.
Debates about biotechnology continue to be polarized despite its potential to improve the living standards of the poor in Sub‐Saharan Africa. In the backdrop of this polarized scenario, this paper asked, is there a place for brokers in bringing about a productive debate that is pro‐development? The paper argued that if potential intermediaries are analyzed from the perspective of understanding their role and stakeholding in the regulatory change process, this may help breakout the current polarized anti‐ and pro‐biotechnology debates and thereby focus on how to enable productive biotechnology development. Informed by insights from innovation brokering, the functions of brokers in biotechnology regulation are analyzed through the lens of organizations involved in agricultural biotechnology debates in Kenya. The analysis found that policy brokering function attracts varying opportunities and challenges appropriate for informing relevant policy. The paper drew lessons from Kenya's experience to inform a productive policy brokering model for biotechnology regulation. 相似文献
74.
75.
Dust was investigated for its ability to retain source attribution profiles (SAPs) after chemical exposure. Three distinct sources of the organophosphate pesticide acephate were investigated as a proof-of-concept model. In addition, attribution profiles were created and tested using compounds related to chemical warfare agents (CWAs), specifically VX and G-series agents: O-ethyl methylphosphonothioate (EMPTA), N,N-diisopropylmethylamine (DIPMA), N,N-diisopropylethylamine (DIEA), diisopropylamine (DIPA), diethyl aniline (DEA), diethyl ethyl phosphonate (DEEP), trimethyl phosphite (TMP), dimethyl hydrogen phosphite (DMHP), diethyl hydrogen phosphite (DEHP), triethyl phosphate (TEP), ethyl methylphosphonate (EMPA), and diisopropyl methylphosphonate (DIMP). Dust was collected from a storage shed, aliquots deposited on carpet and loaded with distinct chemical profiles using an exposure chamber and aerosolizer. After a given period of time (1h, 24h, or 72 h), the dust was extracted and its SAP analyzed by gas chromatography-mass spectrometry (GC-MS) and/or liquid chromatography-tandem mass spectrometry (LC-MS/MS). Principal components analysis (PCA) was used to determine the association of dust exposed to the same and different chemical sources. PCA results demonstrate that dust samples exposed to distinct chemical sources are clearly differentiated from one another across all collection times. Furthermore, dust aliquots exposed to the same source can be clearly associated with one another across all collection times. When the CWA-related compounds were subjected to elevated temperature (90°C) conditions, it was found that the signature was stable at the 1h and 24h collections. At 72 h and elevated temperature, larger deviations from the control were observed for some compounds. Elevated pH (10) affected the profile to a lesser degree than elevated temperature. Overall, dust is found to be an effective media for the in situ collection of source attribution profiles. 相似文献
76.
Amy K. White Gregory Shrader Jared Chamberlain 《Journal of Police and Criminal Psychology》2016,31(2):141-154
The high stress environment of law enforcement places officers at risk for a variety of mental and physical health problems; however, officers are reluctant to seek out treatment. The purpose of this study was to identify which factors associated with law enforcement officers had predictive value in the level of stigma perceived in seeking mental health treatment by currently employed, certified peace officers in Arizona. The factors included sex, age, race/ethnicity, years employed as an officer, size of the department, current rank/position within the department, the type of government operating the agency, and payment of union dues. The study included 454 participants. Participation included the completion of demographic data, the Self-Stigma of Seeking Psychological Help (SSOSH), and the Perceptions of Stigmatization by Others for Seeking Help (PSOSH). Using standard multiple regression, the most significant finding was the relationship between the size of the department and levels of stigma (p = .014); such that, the size was inversely related to the levels of perceived stigma. As the agency size increased, the perceptions of stigma decreased. Such a finding has several implications for law enforcement agencies related to preparedness and training. 相似文献
77.
78.
Joseph White 《Public Budgeting & Finance》2000,20(3):1-23
Policy and budgetary debate about Social Security is greatly affected by understandings of how the program is financed and, therefore, what steps would make it more affordable in the future. Unfortunately, both the standard justifications for and criticisms of buildups in the Social Security trust funds do not reflect the extent to which such buildups in fact would help finance future program costs. This article argues for a different standard, based explicitly on the fiscal capacity of the federal government and the effect of the government's obligations to pay interest on that capacity. I explain how both this definition of the role of the trust funds, and a broader understanding of fiscal capacity, would affect analysis of Social Security's condition and of possible reforms. 相似文献
79.
80.