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   43篇
各国政治   51篇
工人农民   23篇
世界政治   55篇
外交国际关系   24篇
法律   325篇
中国共产党   1篇
中国政治   3篇
政治理论   170篇
综合类   16篇
  2022年   3篇
  2021年   3篇
  2020年   15篇
  2019年   17篇
  2018年   15篇
  2017年   25篇
  2016年   23篇
  2015年   12篇
  2014年   17篇
  2013年   100篇
  2012年   15篇
  2011年   17篇
  2010年   9篇
  2009年   22篇
  2008年   27篇
  2007年   29篇
  2006年   35篇
  2005年   27篇
  2004年   22篇
  2003年   18篇
  2002年   22篇
  2001年   18篇
  2000年   10篇
  1999年   12篇
  1998年   7篇
  1997年   6篇
  1996年   5篇
  1995年   6篇
  1994年   5篇
  1993年   5篇
  1992年   9篇
  1991年   4篇
  1990年   5篇
  1989年   3篇
  1988年   7篇
  1987年   6篇
  1986年   6篇
  1985年   5篇
  1984年   11篇
  1983年   6篇
  1981年   3篇
  1980年   8篇
  1979年   5篇
  1977年   5篇
  1976年   4篇
  1974年   6篇
  1971年   5篇
  1970年   4篇
  1969年   3篇
  1966年   2篇
排序方式: 共有668条查询结果,搜索用时 15 毫秒
51.
52.
This article profiles self-reported substance use, health, and mental health problems among a sample of incarcerated women in Kentucky as well as lifetime service utilization. Findings indicate that a high percentage of women reported use of alcohol, cocaine, and multiple substances during the month before incarceration. In addition, participants reported common health problems such as dental, female reproductive, physical injuries, and mental health problems including depression and anxiety. Participants reported moderate use of emergency room and mental health treatment but limited substance abuse treatment utilization. Implications for criminal justice programs and linkages with community-based aftercare services for women are recommended based on findings that health and mental health problems are associated with service utilization before incarceration.  相似文献   
53.
54.
It has been suggested that inter-canine width plus 57% of the cumulative distance between the lateral aspect of the canines and the pupil centers can be used to estimate mouth width. Evidence also suggests that the distance between the medial irises approximates actual mouth width fairly well. However, these soft tissue prediction guidelines are limited because they rely on accurate medio-lateral positioning of the pupils within the orbits, for which no systematic empirical evidence appears to exist at this stage. It would, therefore, be more appropriate to use only known hard tissue landmarks in mouth width prediction. This study reports the results of using inter-canine width as a percentage of mouth width for its prediction. This method seems favorable in comparison to the other guidelines because it is as accurate, uses known hard tissue landmarks, and does not rely on assumptions concerning pupil location. Estimating mouth width by using the canines alone, therefore, seems the best guideline to use in facial approximation techniques, at least given knowledge existing at this stage.  相似文献   
55.
56.
Identification of unknown living or deceased persons using dental treatment records is an established forensic technique. However, some cases remain unidentified, especially when antemortem dental records are not available for comparison to postmortem dental records. Cytological smears have been previously reported to be potential sources of DNA reference samples which can be compared to DNA recovered from found human remains. The case described here involves an adult skeleton which exhibited extensive, complex dental restorative treatment. A putative identification of the found skeleton as a missing woman was established using circumstantial evidence found at the scene. However, it became important to establish a positive identification using reliable scientific methods. When it was discovered that antemortem dental records were not available because the treatment was completed in another country and the treating dentist could not be found, cytological smears stained with Papanicolaou (PAP) stain obtained from the putative decedent's medical records were used as a reference DNA sample. DNA was recovered from the teeth of the skeleton using cryogenic grinding. Comparison of the genotypes resulted in the conclusion that the DNA originated from the same source. The use of PAP smears in this way is seen as a valuable resource in cases where positive identification using traditional dental and medical records is not possible.  相似文献   
57.
58.
Tests that infer the ancestral origin of a DNA sample have considerable potential in the development of forensic tools that can help to guide crime investigation. We have developed a single-tube 34-plex SNP assay for the assignment of ancestral origin by choosing ancestry-informative markers (AIMs) exhibiting highly contrasting allele frequency distributions between the three major population-groups. To predict ancestral origin from the profiles obtained, a classification algorithm was developed based on maximum likelihood. Sampling of two populations each from African, European and East Asian groups provided training sets for the algorithm and this was tested using the CEPH Human Genome Diversity Panel. We detected negligible theoretical and practical error for assignments to one of the three groups analyzed with consistently high classification probabilities, even when using reduced subsets of SNPs. This study shows that by choosing SNPs exhibiting marked allele frequency differences between population-groups a practical forensic test for assigning the most likely ancestry can be achieved from a single multiplexed assay.  相似文献   
59.
60.
When this Journal decided to run a special issue on IP in theAsia-Pacific region, it was following the conventional wisdomof the profession and the marketplace. For many years, the conceptof the Asia-Pacific sold conferences and printed publications.And it was on this assumption that JIPLP based its decisionto give over its March issue for coverage of that zone. However,there comes a point in the life of  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