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   195篇
  免费   16篇
各国政治   16篇
工人农民   9篇
世界政治   17篇
外交国际关系   11篇
法律   112篇
政治理论   46篇
  2021年   2篇
  2020年   4篇
  2019年   3篇
  2018年   3篇
  2017年   11篇
  2016年   11篇
  2015年   6篇
  2014年   4篇
  2013年   29篇
  2012年   10篇
  2011年   7篇
  2010年   6篇
  2009年   13篇
  2008年   10篇
  2007年   13篇
  2006年   14篇
  2005年   15篇
  2004年   9篇
  2003年   8篇
  2002年   9篇
  2001年   5篇
  2000年   3篇
  1999年   1篇
  1995年   1篇
  1994年   3篇
  1992年   1篇
  1991年   1篇
  1990年   1篇
  1989年   2篇
  1988年   1篇
  1985年   2篇
  1980年   1篇
  1975年   1篇
  1973年   1篇
排序方式: 共有211条查询结果,搜索用时 31 毫秒
121.
Cherry  Todd L.  Kroll  Stephan 《Public Choice》2003,114(3-4):387-420
The effect of primary formats on voting behavior and candidatefortune has been the topic of recent political, academic andlegal arguments. We address these debates by examining voterbehavior and election outcomes across primary systems in thelaboratory. While we find the rate of strategic voting isgenerally low, the rate varies across primary formats and thepotential impact on election outcomes differs fromconventional perceptions. Results suggest that more openprimary systems generate more strategic voting, but contraryto conventional wisdom, more open systems do not necessarilylead to more moderate election winners.  相似文献   
122.
Facial soft tissue depth (FSTD) studies employing clinical computed tomography (CT) data frequently rely on depth measurements from raw 2D orthoslices. However, the position of each patient's head was not standardized in this method, potentially decreasing measurement reliability and accuracy. This study measured FSTDs along the original orthoslice plane and compared these measurements to those standardized by the Frankfurt horizontal (FH). Subadult cranial CT scans (= 115) were used to measure FSTDs at 18 landmarks. Significant differences were observed between the methods at eight of these landmarks (< 0.05), demonstrating that high‐quality data are not generated simply by employing modern imaging modalities such as CT. Proper technique is crucial to useful results, and maintaining control over head position during FSTD data collection is important. This is easily and most readily achieved in CT techniques by rotating the head to the FH plane after constructing a 3D rendering of the data.  相似文献   
123.
With the ever increasing production of average soft tissue depth studies, data are becoming increasingly complex, less standardized, and more unwieldy. So far, no overarching review has been attempted to determine: the validity of continued data collection; the usefulness of the existing data subcategorizations; or if a synthesis is possible to produce a manageable soft tissue depth library. While a principal components analysis would provide the best foundation for such an assessment, this type of investigation is not currently possible because of a lack of easily accessible raw data (first, many studies are narrow; second, raw data are infrequently published and/or stored and are not always shared by some authors). This paper provides an alternate means of investigation using an hierarchical approach to review and compare the effects of single variables on published mean values for adults whilst acknowledging measurement errors and within-group variation. The results revealed: (i) no clear secular trends at frequently investigated landmarks; (ii) wide variation in soft tissue depth measures between different measurement techniques irrespective of whether living persons or cadavers were considered; (iii) no clear clustering of non-Caucasoid data far from the Caucasoid means; and (iv) minor differences between males and females. Consequently, the data were pooled across studies using weighted means and standard deviations to cancel out random and opposing study-specific errors, and to produce a single soft tissue depth table with increased sample sizes (e.g., 6786 individuals at pogonion).  相似文献   
124.
This study applies a narrative lens to policy actors’ discursive strategies in the Scottish debate over fracking. Based on a sample of 226 newspaper articles (2011–2017) and drawing on key elements of the narrative policy framework (NPF), the research examines how policy coalitions have characterized their supporters, their opponents, and the main regulator (Scottish government). It also explores how actors have sought to expand or contain the scope of conflict to favor their policy objectives. Empirically, only the government strives for conflict containment, whereas both pro‐ and anti‐fracking groups prioritize conflict expansion through characterization contests and the diffusion and concentration of the costs/risks and benefits of fracking. In theoretical terms, the study proposes that Sarah Pralle’s conflict management model, which emphasizes symmetrical strategies of conflict expansion by both coalitions, is a potential tool to revise extant NPF expectations about the different narrative strategies of winning and losing coalitions. Moreover, the fact that policy actors mostly employ negatively rather than positively framed characters in their narratives may be a valid expectation for similar policy conflicts, particularly under conditions of regulatory uncertainty.  相似文献   
125.
126.
127.
128.
129.
Postmortem animal mutilations due to domestic dogs in isolated domestic deaths are taphonomic modifications regularly observed by forensic pathologists. They are rarely described in the literature; however, even though they present specific patterns. Through 41 cases, 10 at the forensic institute in Lille (France) and 31 at the New York City Office of Chief Medical Examiner (USA), plus 22 cases from the literature, specific locations and patterns of postmortem scavenging lesions are proposed. These lesions are mainly distributed in three locations: the face, especially the nose and the mouth (73.1%), the neck (43.1%), and the arm (shoulder/upper limb [29.2%], hand [26.8%]). We discuss the time span between death and scavenging, the consequences on identification, and comparison with outdoor settings. Outdoor scavenging lesions are mainly located on the trunk and limbs usually sparing the head, which strongly differs from indoor distribution and imply different animal motivations.  相似文献   
130.
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