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   35篇
  免费   2篇
各国政治   2篇
工人农民   3篇
世界政治   5篇
外交国际关系   1篇
法律   18篇
中国政治   1篇
政治理论   6篇
综合类   1篇
  2018年   3篇
  2017年   3篇
  2016年   4篇
  2015年   1篇
  2013年   8篇
  2011年   2篇
  2010年   1篇
  2009年   1篇
  2007年   3篇
  2006年   2篇
  2005年   1篇
  2003年   1篇
  2001年   1篇
  1999年   2篇
  1994年   2篇
  1992年   1篇
  1989年   1篇
排序方式: 共有37条查询结果,搜索用时 15 毫秒
11.
12.
We report a case of fatal massive pulmonary embolism in an 86-year-old woman. The embolus occurred as a result of embolic bone marrow particles from a fractured femur becoming trapped by a Chiari's network which then acted as a source for propagation of a large thrombus which detached and caused sudden death from massive pulmonary embolism. To our knowledge this is the first report of such a case.  相似文献   
13.
14.
15.
16.
Swipe and wipe are types of transfer patterns commonly encountered at bloodied scenes. So far, there have been little published data on the reliability of evaluating these patterns. In this study, 36 bloodstain patterns were randomly assigned to 12 analysts in three separate trials, and the analysts were required to evaluate the pattern type and directionality. The results revealed that correct classifications of patterns type were problematic, with an overall error rate of 32%. Wipes created from wet bloodstains were the most difficult to identify due to the absence of signs of alteration. The directionality of swipes made with a gloved finger had a 100% success rate; however, for swipes made with cloth, the analysts mistook the direction in nearly every case, which is of significant concern, considering these are common patterns at crime scenes. This study suggested there is a need for revising the current protocols for interpretation of these pattern types.  相似文献   
17.
The aim of this study was to evaluate the accuracy and reliability of the rapid analyte measurement platform (RAMP) for presumptive identification of Bacillus anthracis spores. Test samples consisted of serial dilutions of spore preparations of several Bacillus species, including B. anthracis, which were tested, using the RAMP Anthrax test cartridge, according to the manufacturer's instructions. The fluorescence labelled antibody-antigen complexes were detected in the portable reader after 15 min following sample addition. Dilutions of common environmental and household powders were also tested to identify possible false positive results. B. anthracis spores were identified reliably in test samples containing more than 6000 spores. The test kits were highly specific, showing no cross reactivity with other Bacillus species or any environmental powders tested. The RAMP system for detection of B. anthracis spores, from environmental samples, showed consistent results under a variety of analytical conditions, enabling the trained user to provide a rapid, accurate preliminary risk assessment of a suspected bioterrorism incident.  相似文献   
18.
Ethnic/racial self-labeling represents one’s knowledge of and preference for ethnic/racial group membership, which is related to, but distinguishable from, ethnic/racial identity. This study examined the development of ethnic/racial self-labeling over time by including the concept of elaboration among a diverse sample of 297 adolescents (Time 1 mean age 14.75, 67% female, 37.4% Asian or Asian American, 10.4% Black, African American, or West Indian, 23.2% Hispanic or Latinx, 24.2% White, 4.4% other). Growth mixture modeling revealed two distinct patterns—low and high self-labeling elaboration from freshman to sophomore year of high school. Based on logistic regression analyses, the level of self-labeling elaboration was generally low among the adolescents who were foreign-born, reported low levels of ethnic/racial identity exploration, or attended highly diverse schools. We also found a person-by-context interaction where the impact of school diversity varied for foreign-born and native-born adolescents (b?=?12.81, SE?=?6.30, p?<?0.05) and by the level of ethnic/racial identity commitment (b?=?14.32, SE?=?6.65, p?<?0.05). These findings suggest varying patterns in ethnic/racial self-labeling elaboration among adolescents from diverse backgrounds and their linkage to individual and contextual factors.  相似文献   
19.
Studies in Comparative International Development - What explains the persistent growth of public employment in reform-era China despite repeated and forceful downsizing campaigns? Why do some...  相似文献   
20.
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