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   625篇
  免费   60篇
各国政治   36篇
工人农民   30篇
世界政治   97篇
外交国际关系   61篇
法律   231篇
中国政治   7篇
政治理论   219篇
综合类   4篇
  2024年   1篇
  2023年   10篇
  2022年   8篇
  2021年   6篇
  2020年   27篇
  2019年   28篇
  2018年   50篇
  2017年   61篇
  2016年   37篇
  2015年   28篇
  2014年   30篇
  2013年   87篇
  2012年   35篇
  2011年   23篇
  2010年   15篇
  2009年   17篇
  2008年   30篇
  2007年   23篇
  2006年   10篇
  2005年   15篇
  2004年   13篇
  2003年   16篇
  2002年   15篇
  2001年   14篇
  2000年   9篇
  1999年   9篇
  1998年   6篇
  1997年   5篇
  1996年   3篇
  1995年   7篇
  1994年   4篇
  1993年   8篇
  1992年   4篇
  1991年   2篇
  1990年   1篇
  1989年   2篇
  1988年   4篇
  1987年   1篇
  1986年   2篇
  1984年   4篇
  1983年   2篇
  1980年   1篇
  1978年   2篇
  1977年   2篇
  1976年   1篇
  1975年   1篇
  1974年   2篇
  1973年   1篇
  1971年   3篇
排序方式: 共有685条查询结果,搜索用时 203 毫秒
151.
European Commission expert groups provide powerful platforms from which interest organisations can steer the EU consultation process and weigh in on policy outcomes. Commission decision-makers and bureaucrats rely heavily on expert groups to provide expert policy advice on highly technical issues in the early stages of the policymaking process. Interest organisations provide this advice in order to have their voices heard at the EU level. But whose interests are being represented in these expert groups? Which types of interest organisations, in other words, get a seat at the table and why? This article, using data on over 800 expert groups and nearly 3,000 interest organisations, argues that expert group membership is largely a function of superior resources, EU-level interests and existing institutionalised ties to decision-makers. Far from simply addressing the Commission’s need for expertise, expert group membership is more a story of capital and capture.  相似文献   
152.
153.
Employment status following spinal cord injury (SCI) has important implications for financial and psychosocial well-being. Several age-related variables-in particular chronological age, duration of SCI, and age at SCI onset-have been identified as being associated with employment among individuals with SCI. Cross-sectional investigations of this topic are complicated by methodological and statistical issues associated with aging and disability. The purpose of the current study was to examine the associations between three aging variables and employment status in individuals with SCI through a series of regression analyses. Six hundred twenty individuals with SCI completed a survey that included measures of demographic characteristics, pain, psychological functioning, physical functioning, fatigue, and sleep. The results indicated that chronological age and age at SCI onset were significant predictors of employment status. A significantly greater proportion of individuals aged 45-54 were employed compared to those aged 55-64 even after controlling for biopsychosocial variables. Additionally, there was a negative linear relationship between percent employed and age at SCI onset, and this relationship was not accounted for by the biopsychosocial variables. The analyses used in this study provide one method by which to disentangle the effects of different age-related variables on important SCI outcomes in cross-sectional research. Continued research in this area is needed to better understand age-related effects on employment status, which could be used to help maximize the quality of life in individuals with SCI.  相似文献   
154.
Normal adrenocortical activity is necessary for electrolyte regulation and the maintenance of cardiovascular function. Although chronic adrenal insufficiency generally presents with the gradual onset of a set of characteristic symptoms and signs, the more sudden loss of adrenal activity can present with acute, rapidly progressive cardiovascular dysfunction that can be fatal if not recognized and treated promptly. We herein describe a patient who had most of his adrenal tissue removed during resection of metastatic renal carcinoma, conventional clear cell type, with much of the remaining adrenal tissue undergoing necrosis during or shortly after surgery. Although the patient appeared to be stable and progressing adequately well, he died suddenly 2 days postoperatively. When the gross autopsy findings suggested the possibility of adrenal insufficiency, clinical laboratory assessment of adrenocortical activity was sought. Analysis of stored antemortem serum samples and of blood obtained at autopsy demonstrated a progressive decrease in cortisol levels which, in this stressed postsurgical patient, proved fatal. The use of both antemortem and postmortem blood in the demonstration of acute adrenal insufficiency at autopsy is discussed.  相似文献   
155.
The technique of principal component analysis has been applied to the UV-vis spectra of inks obtained from a wide range of black ballpoint pens available in the UK market. Both the pen ink and material extracted from the ink line on paper have been examined. Here, principal component analysis characterised each spectrum within a group through the numerical loadings attached to the first few principal components. Analysis of the spectra from multiple measurements on the same brand of pen showed excellent reproducibility and clear discrimination between inks that was supported by statistical analysis. Indeed it was possible to discriminate between the pen ink and the ink line from all brands examined in this way, suggesting that the solvent extraction process may have an influence on these results. For the complete set of 25 pens, interpretation of the loadings for the first few principal components showed that both the pen inks and the extracted ink lines may be classified in an objective manner and in agreement with the results of parallel thin layer chromatography studies. Within each class almost all inks could be individualised. Further work has shown that principal component analysis may be used to identify a particular ink from a database of reference UV-vis spectra and a strategy for developing this approach is suggested.  相似文献   
156.
157.
Gearey  Adam 《Liverpool Law Review》2001,23(2):199-209
Any abstract would ruin the poetic economy ofthis text. This revised version was published online in August 2006 with corrections to the Cover Date.  相似文献   
158.
159.
160.
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