全文获取类型
收费全文 | 315篇 |
免费 | 10篇 |
专业分类
各国政治 | 23篇 |
工人农民 | 17篇 |
世界政治 | 47篇 |
外交国际关系 | 14篇 |
法律 | 149篇 |
中国政治 | 3篇 |
政治理论 | 71篇 |
综合类 | 1篇 |
出版年
2023年 | 4篇 |
2022年 | 1篇 |
2021年 | 2篇 |
2020年 | 4篇 |
2019年 | 10篇 |
2018年 | 7篇 |
2017年 | 11篇 |
2016年 | 11篇 |
2015年 | 5篇 |
2014年 | 5篇 |
2013年 | 45篇 |
2012年 | 9篇 |
2011年 | 13篇 |
2010年 | 7篇 |
2009年 | 4篇 |
2008年 | 7篇 |
2007年 | 12篇 |
2006年 | 11篇 |
2005年 | 6篇 |
2004年 | 9篇 |
2003年 | 10篇 |
2002年 | 7篇 |
2001年 | 11篇 |
2000年 | 11篇 |
1999年 | 12篇 |
1998年 | 11篇 |
1997年 | 5篇 |
1996年 | 4篇 |
1995年 | 6篇 |
1994年 | 5篇 |
1993年 | 2篇 |
1992年 | 8篇 |
1991年 | 4篇 |
1989年 | 7篇 |
1988年 | 2篇 |
1987年 | 2篇 |
1986年 | 6篇 |
1985年 | 7篇 |
1984年 | 1篇 |
1982年 | 5篇 |
1981年 | 2篇 |
1980年 | 2篇 |
1979年 | 3篇 |
1978年 | 3篇 |
1977年 | 2篇 |
1976年 | 1篇 |
1974年 | 2篇 |
1973年 | 1篇 |
排序方式: 共有325条查询结果,搜索用时 15 毫秒
111.
This paper analyses income distribution and socioeconomic mobility within a framework that: (1) incorporates a dynamic as well as a static view of equity, (2) includes the distribution of income by households or individuals and also by socioeconomic classes, and (3) explicitly includes the translation from the distribution by socioeconomic groups into the overall size distribution. The dynamic analysis makes use of a mobility matrix which is similar to the transition matrix in dynamic Markov analysis. A representative mobility matrix is presented which includes ten socioeconomic groups. Four categories of mobility are identified: (1) rural‐urban migration, (2) movements within the urban labour market, (3) movement through the educational system, and (4) capital formation and asset redistribution. Some numerical examples are given analysing development strategies combining high or low socioeconomic mobility with equalising or unequalising growth. 相似文献
112.
113.
Odile M. Loreille Ph.D. Ryan L. Parr Ph.D. Kevin A. McGregor B.S. Colleen M. Fitzpatrick Ph.D. Chriss Lyon B.S. Dongya Y. Yang Ph.D. Camilla F. Speller M.A. Michael R. Grimm C.P.L.E. Michael J. Grimm Jodi A. Irwin Ph.D. Edward M. Robinson M.F.S. 《Journal of forensic sciences》2010,55(3):813-818
Abstract: This report describes the identification of a merchant mariner who perished in 1948 when Northwest Airlines Flight 4422, a DC‐4 carrying 24 seamen and six crew members crashed into Mount Sanford, Alaska. Fifty‐one years later, a human forearm and hand were found close by the wreckage of the plane, prompting identification efforts using DNA and fingerprints. There were significant challenges to both the fingerprint and DNA analyses. The hand was badly desiccated, making fingerprint friction‐ridge detail almost invisible and the remains had been embalmed upon discovery, making DNA amplification difficult. We present the results of an interdisciplinary approach that successfully addressed these challenges and ultimately led to the identification of the remains. These efforts relied on efficient fingerprint rejuvenation and imaging techniques that improved print resolution, as well as new DNA extraction techniques optimized for aggressively embalmed remains. 相似文献
114.
115.
In recent months, there has been increased reporting of seized drug and toxicology cases containing rodenticides, the active ingredient in rat poisons. Seeing as rodenticides are not scheduled substances, they are not commonly screened for in seized drug analysis. This work investigates the use of TD‐DART‐MS for the simultaneous detection of rodenticides and drugs. Six rodenticides were evaluated, an optimal method was established, and limits of detection in the tens of nanograms were calculated. Additional studies highlight that detection at less than 1% by weight in mixtures with AB‐FUBINACA, cocaine, heroin, or methamphetamine was possible. This work presents an optimized method for detection of these compounds, allowing for the simultaneous detection of drugs and rodenticides, providing drug chemists with a tool for rapid identification of these compounds for forensic or public health purposes. 相似文献
116.
Death in the dental chair 总被引:1,自引:0,他引:1
E M Robinson 《Journal of forensic sciences》1989,34(2):377-380
Death during dental anesthesia is relatively rare. Review of eight such cases which occurred in our county, including the different anesthetics used, revealed one apparent basic pattern that prevailed...a need for awareness that something might go wrong and recognition of the fact that it was going wrong. 相似文献
117.
David G. Becker Lawrence C. Mayer Jack Donnelly Jock Anderson Peter Hazell Jay Weinstein Fred M. Hayward Leon Zamosc Jan Knippers Black Jacquline A. Braveboy-Wagner Jeff Brannon George W. Grayson M. Francis Abraham Warren C. Robinson Claude E. Welch Leslie Anderson Juan M. del Aguila Cornelia Flora 《Studies in Comparative International Development (SCID)》1991,26(3):88-127
118.
John B. Robinson 《Policy Sciences》1992,25(3):237-254
This article examines two examples of what has been called mandated science - risk analysis and long-term energy demand forecasting - with a view to disentangling the implicit assumptions underlying their use in public policy debates and in the policy process. In both fields, there has emerged a growing and very similar challenge to traditional views of the role and status of mandated science in informing decision-making. This challenge has led to the reformulation of some of the attributes of the standard view, without however causing changes in the underlying view of the nature of the problem or the role of science in principle. A deeper critique suggests that mandated science is inherently value-laden, producing conclusions that are strongly affected by theoretical presuppositions that in turn reflect underlying values (e.g., about rationality, knowledge or the role of technology). Thus a sharp separation of science and policy is untenable and amounts to a hidden policy bias in favor of the business-as-usual policies supported by conventional science. There is a need for a new concept of science, one that is more integrated into the policy context, more contextual and openly value-laden, less oriented to mastery over natural and social processes, and more accessible to the public at large. 相似文献
119.
120.