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   239篇
  免费   18篇
各国政治   19篇
工人农民   11篇
世界政治   20篇
外交国际关系   11篇
法律   125篇
中国政治   1篇
政治理论   70篇
  2021年   2篇
  2020年   4篇
  2019年   4篇
  2018年   4篇
  2017年   12篇
  2016年   13篇
  2015年   6篇
  2014年   5篇
  2013年   38篇
  2012年   12篇
  2011年   7篇
  2010年   7篇
  2009年   15篇
  2008年   12篇
  2007年   13篇
  2006年   14篇
  2005年   15篇
  2004年   10篇
  2003年   9篇
  2002年   10篇
  2001年   6篇
  2000年   4篇
  1999年   2篇
  1997年   1篇
  1996年   2篇
  1995年   1篇
  1994年   5篇
  1992年   2篇
  1991年   2篇
  1990年   1篇
  1989年   2篇
  1988年   2篇
  1987年   1篇
  1985年   4篇
  1983年   1篇
  1981年   2篇
  1980年   1篇
  1978年   2篇
  1977年   1篇
  1975年   1篇
  1973年   1篇
  1967年   1篇
排序方式: 共有257条查询结果,搜索用时 15 毫秒
21.
22.
23.
Abstract: Recently a small sampled cadaver study (n = 4) suggested that the human eyeballs are placed closer to the orbital roof and lateral orbital wall as first reported in the anatomical literature many years previously. This contrasts with central positioning of the eyeball within the orbit as advocated by the facial approximation literature. Given the limits of such small samples, this study re-examined globe position in nine new cadavers to help clarify which relationship is accurate. The results essentially confirm prior empirical findings except that the mean lateral divergences from the orbit center were found to be larger—the eyeball was found to be “displaced” 1.4 mm superiorly and 2.4 mm laterally. Medians calculated across all 13 cadavers from this study and the above-mentioned recent report refine these measurements to 1.4 and 2.3 mm respectively. Globe projection values were identical to those observed for living individuals (c. 16 mm).  相似文献   
24.
25.
Postmortem investigation is increasingly supported by computed tomography (CT) and magnetic resonance imaging, in which postmortem minimal invasive angiography has become important. The newly introduced approach using an aqueous contrast agent solution provided excellent vessel visualization but was suspected to possibly cause tissue edema artifacts in histological investigations. The aim of this study was to investigate on a porcine heart model whether it is possible to influence the contrast agent distribution within the soft tissue by changing its viscosity by dissolving the contrast agent in polyethylene glycol (PEG) as a matrix medium. High-resolution CT scans after injection showed that viscosities above c. 15 mPa s (65% PEG) prevented a contrast agent distribution within the capillary bed of the left ventricular myocardium. Thereby, the precondition of edema artifacts could be reduced. Its minimal invasive application on human corpses needs to be further adapted as the flow resistance is expected to differ between different tissues.  相似文献   
26.
Postmortem diagnosis of diabetes and a diabetic coma can be difficult because of the lack of characteristic morphological findings. 1,5-Anhydroglucitol (1,5-AG), the 1-deoxy form of glucose, competes with glucose for reabsorption in the kidneys. Therefore, diabetics with a permanent hyperglycemia show significantly lower serum concentrations of 1,5-AG than non-diabetics. A liquid chromatography-mass spectrometric method for the determination of 1,5-AG in serum and postmortem blood was developed and validated according to international guidelines. Linearity was given between 1μg/ml and 50μg/ml. Recovery rates ranged between 70.8% and 89.8%, the limit of quantification of the procedure was 0.20μg/ml, limit of quantification was 0.55μg/ml. Serum of 199 diabetics and 116 non-diabetics and femoral blood of 31 diabetic and 27 non-diabetic deceased was measured. Average concentrations were significantly (p<0.001) higher in non-diabetics compared to diabetics ante and postmortem. Seven of the diabetics may have died because of a hyperglycemic coma indicated by a sum formula of Traub>450mg/dl. 1,5-AG average concentrations in these deceased were not significantly different to diabetics which did not die because of a diabetic coma. Concentrations of 1,5-AG give a hint for not well controlled diabetes antemortem and postmortem and can be assumed as an additional and alternative information postmortem to the measurement of HbA1c or fructosamine.  相似文献   
27.
28.
The equal treatment of all citizens is one of the fundamental principles of good administrative practice. Nevertheless, there are growing numbers of media and scientific reports on unequal treatment by public administrations. This article examines the unequal treatment of citizens by gender and ethnic origin by means of a survey‐based field experiment in German local government. With the help of two vignettes and randomized assignment of names, responses to fake citizen requests by local governments are analyzed for speed, quality, and service orientation. The results show very limited discrimination effects. While there is no evidence for general ethnic discrimination, a more differentiated analysis indicates patterns of ethnic discrimination conditioned by gender.  相似文献   
29.
Recent studies in international relations (IR) have devoted little systematic attention to the personnel of international organizations. This article argues that the works of Max Weber could provide an orientation for future research on the cohesion and autonomy of the staff in international bureaucracies. In his writings, Weber highlights the role of bureaucratic officials as an “occupational status group” or Berufsstand distinguished by their professional ethics, privileged positions, practices of social closure and a particular style of life, which is expressed in a claim to social prestige. Weber suggests a sociological analysis of bureaucratic staff, whose group character is determined by their occupation and profession. The article outlines Weber’s understanding of the administrative official by revisiting his seminal sociological and political writings. The added value of Weber’s conception for IR is demonstrated with an empirical sketch of the EU civil service, which can be analysed as a transnational status group in the making.  相似文献   
30.
To what extent can we speak of a distinctively ‘European’ security approach towards the Asia-Pacific region? In order to address that timely question, this article examines how Britain, France, Germany and the European Union (EU) are framing their evolving security roles in the Asia-Pacific region, and how those individual perspectives intersect with each other. The article identifies a number of important common features in Europe’s approaches towards security in the Asia-Pacific, namely the tendency of most European actors to emphasize the economic and diplomatic nature of their contribution to regional security, their promotion of regional multilateral security fora, their rejection of the notion that China’s rise is inherently challenging for regional and global security, and their willingness to signal their differences towards Washington’s emphasis on military power and alliance-based approach. However, and despite the existence of common traits, individual European actors show different degrees of closeness vis-à-vis the US and China and feature different perspectives regarding which security relationships they should prioritize in the region (if any), or the appropriate balance between diplomacy and security and defence cooperation. Such divergences prevent Europeans from developing a coherent security profile in the region and preclude us from speaking of a distinctively European security approach towards the Asia-Pacific.  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