首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   404篇
  免费   19篇
各国政治   36篇
工人农民   42篇
世界政治   33篇
外交国际关系   21篇
法律   194篇
中国政治   7篇
政治理论   87篇
综合类   3篇
  2023年   2篇
  2021年   3篇
  2020年   4篇
  2019年   10篇
  2018年   12篇
  2017年   15篇
  2016年   15篇
  2015年   10篇
  2014年   8篇
  2013年   57篇
  2012年   17篇
  2011年   11篇
  2010年   7篇
  2009年   11篇
  2008年   11篇
  2007年   18篇
  2006年   12篇
  2005年   13篇
  2004年   12篇
  2003年   12篇
  2002年   12篇
  2001年   11篇
  2000年   8篇
  1999年   9篇
  1998年   4篇
  1997年   9篇
  1996年   4篇
  1995年   2篇
  1994年   10篇
  1993年   3篇
  1992年   4篇
  1991年   3篇
  1990年   12篇
  1989年   3篇
  1988年   7篇
  1987年   4篇
  1986年   4篇
  1985年   4篇
  1984年   6篇
  1983年   7篇
  1982年   4篇
  1981年   6篇
  1979年   6篇
  1978年   2篇
  1977年   3篇
  1976年   2篇
  1975年   4篇
  1974年   2篇
  1968年   2篇
  1964年   1篇
排序方式: 共有423条查询结果,搜索用时 15 毫秒
171.
Previous studies on Diptera have shown the potential for the use of cuticular hydrocarbons' analysis in the determination of larval age and hence the postmortem interval (PMI) for an associated cadaver. In this work, hydrocarbon compounds, extracted daily until pupation from the cuticle of the blowfly Lucilia sericata (Diptera: Calliphoridae), have been analyzed using gas chromatography–mass spectrometry (GC–MS). The results show distinguishing features within the hydrocarbon profile over the period of the larvae life cycle, with significant chemical changes occurring from the younger larvae to the postfeeding larvae. Further interpretation of the chromatograms using principal component analysis revealed a strong correlation between the magnitudes of particular principal components and time. This outcome suggests that, under the conditions of this study, the cuticular hydrocarbons evolve in a systematic fashion with time, thus supporting the potential for GC–MS analysis as a tool for establishing PMI where such a species is present.  相似文献   
172.
173.
A four‐year‐old previously well boy collapsed unexpectedly and was taken immediately to hospital, where he developed seizures and cardiogenic shock with lethal, rapidly progressing multi‐organ failure. At autopsy, the height was >90th percentile and there were indications of early virilization. Internally, a friable tumor of the left adrenal gland was identified that had invaded the left renal vein and inferior vena cava. Histology revealed typical features of an adrenocortical carcinoma with aggregated trabeculae of cells containing abundant eosinophilic cytoplasm and large pleomorphic nuclei. There was strong positive cytoplasmic staining for inhibin; mitochondria were shown on electron microscopy to contain prominent electron‐dense granules. Death was due to massive pulmonary tumor embolism. Although adrenocortical carcinomas are very rare and are more commonly found in adults, the current case demonstrates that they may also occur in childhood and be responsible for unexpected death by the very unusual mechanism of tumor embolism.  相似文献   
174.
Drawing on the work of Paul Virilio, this paper addresses changes in the architectural and legal topography of the urban landscape through an examination of regulatory patterns, which increasingly intensify governance through, and as, ‘control’. Such regulation is ambivalent in that it cuts across many traditionally discrete regimes of power melding them into new forms with new effects; as a consequence it is no longer sufficient to think in terms of such distinctions as private/public, civil/criminal, and so on. This paper argues that a concern with patterns of enclosure and privatisation in our urban centres must now be placed within the context of changes in architectural practice and technology, which the authors term ‘open architecture’, and the embedding of governance through partnership, which give particular emphasis to the use of dematerialised and diffused modes of control. The paper utilises Virilio’s history and image of the fortress, which he tracks from a material form to a dematerialised form, to envisage these developments and to provide the foundation for an understanding of the importance of the development of practices of surveillance into, what the authors term, ‘total registration’ as a feature and function of governance through ‘control’.
Nathan MooreEmail:
  相似文献   
175.
Sudden infant death syndrome (SIDS) still accounts for considerable numbers of unexpected infant deaths in many countries. While numerous theories have been advanced to explain these events, it is increasingly clear that this group of infant deaths results from the complex interaction of a variety of heritable and idiosyncratic endogenous factors interacting with exogenous factors. This has been elegantly summarised in the "three hit" or "triple risk" model. Contradictions and lack of consistencies in the literature have arisen from diverse autopsy approaches, variable applications of diagnostic criteria and inconsistent use of definitions. An approach to sudden infant death is outlined with discussion of appropriate tissue sampling, ancillary investigations and the use of controls in research projects. Standardisation of infant death investigations with the application of uniform definitions and protocols will ensure optimal investigation of individual cases and enable international comparisons of trends.  相似文献   
176.
Writing in 1999, legal ethics scholar Brad Wendel noted that "[v]ery little empirical work has been done on the moral decision making of lawyers." Indeed, since the mid-1990s, few empirical studies have attempted to explore how attorneys deliberate about ethical dilemmas they encounter in their practice. Moreover, while past research has explored some of the ethical issues confronting lawyers practicing in certain specific areas of practice, no published data exists probing the moral mind of health care lawyers. As signaled by the creation of a regular column "devoted to ethical issues arising in the practice of health law" in the Journal of Law, Medicine & Ethics , the time to address the empirical gap in the professional ethics literature is now. Accordingly, this article presents data collected from 120 health care lawyers. Presenting this population with a number of hypothetical scenarios relating to how they would respond when confronting an ethical dilemma without an obvious solution or when facing a situation in which their personal values were in tension with their professional obligations, this article represents a first step toward better understanding how lawyers who practice in health care settings understand and resolve the moral discomfort they encounter in their professional lives.  相似文献   
177.
Child welfare administrative data are increasingly used to identify racial/ethnic disproportionality and disparities at various levels of aggregation. However, child welfare agencies typically face challenges in harnessing administrative data to examine racial/ethnic disproportionality and disparities at meaningful levels of analysis due to limited resources and/or tools for reporting. This article describes the process through which a multi-state workgroup designed and developed management reports to monitor racial/ethnic disparities and disproportionality using a web-based child welfare administrative data reporting system. The article provides an overview of the process, outcome, and challenges of the group’s work with the goal of offering a starting point for discussion to others who may be seeking to monitor racial/ethnic disparities and disproportionality, regardless of their reporting system.  相似文献   
178.
Studies examining gender inequality and crime have often explored the connection between female victimisation and crime. However, feminist theories do provide a rationale for gender inequality affecting all crime, not just female victimisation. Using the ameliorative and the backlash hypothesis the current analysis examined gender inequality and homicide in 94 countries. Using a gender inequality index, we found that as gender inequality increased the homicide rate increased. This finding supports the ameliorative hypothesis, which states that as societies become more equal crime will decrease.  相似文献   
179.
We have developed a technique that allows investigators to confirm the presence of blood, semen, and/or saliva in a crime scene sample. It is a confirmatory test where multiple samples can be processed in less than an hour, and it is potentially portable, permitting samples to be processed at the crime scene. Samples at a scene giving a positive result can be further processed while those failing to do so may be ignored. There is a large and growing backlog of DNA evidence in the USA, slowing down the criminal justice system. This backlog has continued to grow despite an increase in the ability to process evidence faster. This technique uses quantum dot molecular beacons to test for tissue‐specific RNA species, identifying particular body fluids. We have demonstrated the tissue specificity of molecular beacons for blood, semen, and saliva.  相似文献   
180.
Moore M 《Time》2007,169(22):48-50
  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号