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   219篇
  免费   9篇
各国政治   27篇
工人农民   12篇
世界政治   18篇
外交国际关系   21篇
法律   97篇
中国政治   2篇
政治理论   49篇
综合类   2篇
  2024年   3篇
  2023年   10篇
  2022年   4篇
  2021年   6篇
  2020年   6篇
  2019年   7篇
  2018年   11篇
  2017年   14篇
  2016年   9篇
  2015年   4篇
  2014年   6篇
  2013年   42篇
  2012年   6篇
  2011年   8篇
  2010年   5篇
  2009年   9篇
  2008年   7篇
  2007年   11篇
  2006年   10篇
  2005年   6篇
  2004年   7篇
  2003年   4篇
  2002年   1篇
  2001年   6篇
  2000年   2篇
  1999年   2篇
  1998年   1篇
  1997年   1篇
  1995年   2篇
  1994年   2篇
  1992年   3篇
  1991年   2篇
  1990年   1篇
  1989年   1篇
  1987年   1篇
  1984年   1篇
  1983年   1篇
  1982年   1篇
  1978年   1篇
  1975年   1篇
  1974年   1篇
  1970年   1篇
  1966年   1篇
排序方式: 共有228条查询结果,搜索用时 15 毫秒
71.
72.
Allele frequency for the 9 STR loci (D3S1358, vWA, FGA, D8S1179, D21S11, D18S51, D5S818, D13S317, D7S820) were estimated from a total of 1096 individuals belonging to 27 endogamous populations from the state of Andhra Pradesh, India, covering the entire gamut of socio-economic variation of the linguistic region. These loci are found to be highly polymorphic within the populations with high levels of average heterozygosity (>0.80). However, the allele frequency distributions are fairly uniform across the populations in case of these loci suggesting relatively greater homogeneity among the populations. Regrouping populations into five broad socio-economic categories further reiterated the homogenous pattern of genetic diversity.  相似文献   
73.
74.
Although suicidal behavior in children and adolescents is a major public health problem, large-scale research on suicide in this population is uncommon. In this study, we reviewed autopsy and field reports for all pediatric suicide cases referred to the New Mexico Office of the Medical Investigator from 1979 to 2005. The age-adjusted suicide rate was 4.8 per 100,000. Psychologic stressors and parasuicidal behavior were identified in some cases. Seventy-six percent of suicides occurred in the victim's home or yard, and 25% left a suicide note. In 26% of cases, alcohol or other drugs were detected in postmortem. Gunshot wound was the most common method overall (58%), followed by hanging (30%). Although the age-adjusted suicide rate is higher in New Mexico than nationally, the trends in the population are similar. With a solid understanding of the circumstances, it may be possible to predict, and hopefully prevent, future cases of child and adolescent death.  相似文献   
75.
76.
77.
78.
79.
With data from the 1979–1985 Longitudinal Mortality Study, we examine the effects of marital status and social isolation on adult male homicide (ICD-9 Codes E960-E978). Cox proportional hazards models were fitted to a 1979–1981 population cohort of approximately 200,000 adult men and their mortality experiences were followed until 1984–1985. Multivariate hazards regression analysis showed that marital status and social isolation are associated with significantly higher risks of homicide victimization. Controlling for age and other socioeconomic covariates, single persons were 1.9 times, and divorced, separated or widowed persons were 1.7 times, more likely to die from homicide than married persons. Socially isolated persons were 1.6 times more likely to become homicide victims. Other adult males with increased risk of homicide victimization were African Americans and those who lived in the inner city.  相似文献   
80.
Estimation of stature from foot and shoe measurements using multiplication factors is well known. It is a simple method and it is used very frequently as a ready reckoner in forensic anthropology. However the individual error is quite large. In the present work an attempt has been made to evolve revised multiplication factors to reduce this error so that this method (multiplication factor) can be used more effectively with smaller error.  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