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   5808篇
  免费   193篇
各国政治   17篇
工人农民   15篇
世界政治   41篇
外交国际关系   92篇
法律   2210篇
中国共产党   34篇
中国政治   782篇
政治理论   132篇
综合类   2678篇
  2024年   1篇
  2023年   16篇
  2022年   26篇
  2021年   23篇
  2020年   80篇
  2019年   70篇
  2018年   65篇
  2017年   75篇
  2016年   92篇
  2015年   99篇
  2014年   325篇
  2013年   448篇
  2012年   374篇
  2011年   355篇
  2010年   404篇
  2009年   447篇
  2008年   449篇
  2007年   469篇
  2006年   434篇
  2005年   410篇
  2004年   391篇
  2003年   329篇
  2002年   255篇
  2001年   193篇
  2000年   68篇
  1999年   24篇
  1998年   10篇
  1997年   2篇
  1996年   4篇
  1995年   6篇
  1994年   7篇
  1993年   5篇
  1992年   7篇
  1991年   6篇
  1990年   4篇
  1989年   4篇
  1988年   3篇
  1987年   9篇
  1986年   6篇
  1985年   6篇
排序方式: 共有6001条查询结果,搜索用时 15 毫秒
971.
应用PCR方法对采集自新疆沙湾地区某猪场的疑似仔猪多系统衰竭综合征病料猪圆环病毒2型(PCV2)全基因组进行了扩增,确定了2份病料中的PCV2的分子特征,命名为XJ-SW1、XJ-SW2(Gen-Bank登录号:JN639856,JN639857)。经对阳性样品进行克隆、测定,并应用软件进行全基因组核苷酸序列比对分析。结果显示,2株病毒的基因组全长均为1 768nt;XJ-SW1株与我国山东DE株(GenBank登录号:HM142897)的同源性最高(为97.91%);XJ-SW2株与韩国G2284株(GenBank登录号:JF317587)的同源性最高(为97.51%)。PCV2全基因组序列的进化分析表明,2株病毒为PCV2e基因亚型;对2株病毒与5个不同基因亚型的15株病毒的ORF2氨基酸序列进行比较,结果显示,XJ-SW1、XJ-SW2在ORF2的氨基端与PCV2d同源性较高,在羧基端与PCV2e同源性较高。表明,在新疆沙湾猪场流行的PCV2毒株为PCV2e,该毒株的ORF2存在一定变异。  相似文献   
972.
随公共卫生事业发展,过度医疗如悬崖转石般兴起.医疗机构及医务人员违背行医规范而实施过度医疗,不仅侵蚀国家正常的医疗卫生秩序,也不断加剧医患信任危机.国内法律对过度医疗行为的规制尚且停留在民法和行政法领域,刑事立法仍空白.医疗事故罪、非法行医罪、诈骗罪等现有相关罪名在规制过度医疗行为时暴露局限性,并不能合理规制过度医疗行...  相似文献   
973.
Thirty‐eight participants took part in a study that investigated the potential cascading effects of initial exposure to extraneous context upon subsequent decision‐making. Participants investigated a mock crime scene, which included the excavation of clandestine burials that had a male skeletal cast dressed either in female or gender neutral clothing. This was followed by a forensic anthropological assessment of the skeletal remains, with a control group assessing the same male skeletal cast without any clothing context. The results indicated that the sex assessment was highly dependent upon the context in which participants were exposed to prior to the analysis. This was especially noticeable in the female clothing context where only one participant determined the male skeletal cast to be male. The results demonstrate the importance of understanding the role of context in forensic anthropology at an early stage of an investigation and its potential cascading effect on subsequent assessments.  相似文献   
974.
With an increase in the creation and maintenance of personal websites, web content management systems are now frequently utilized. Such systems offer a low cost and simple solution for those seeking to develop an online presence, and subsequently, a platform from which reported defamatory content, abuse, and copyright infringement has been witnessed. This article provides an introductory forensic analysis of the three current most popular web content management systems available, WordPress, Drupal, and Joomla! Test platforms have been created, and their site structures have been examined to provide guidance for forensic practitioners facing investigations of this type. Result's document available metadata for establishing site ownership, user interactions, and stored content following analysis of artifacts including Wordpress's wp_users, and wp_comments tables, Drupal's “watchdog” records, and Joomla!'s _users, and _content tables. Finally, investigatory limitations documenting the difficulties of investigating WCMS usage are noted, and analysis recommendations are offered.  相似文献   
975.
This study is part of a larger research project on police crime in the United States. Police crimes are those criminal offenses committed by sworn law enforcement officers who have the general powers of arrest. Profit-motivated police crime involves officers who use their authority of position to engage in crime for personal gain. This study reports the findings on 1,591 cases where a law enforcement officer was arrested for one or more profit-motivated crimes during the seven-year period 2005–2011. The profit-motivated arrest cases involved 1,396 individual officers employed by 782 state, local, special, constable, and tribal law enforcement agencies located in 531 counties and independent cities in 47 states and the District of Columbia. Our data is the first systematic study of profit-motivated police crime. The study describes the nature of this form of police misconduct in terms of several dimensions, including the characteristics of police who perpetrate these crimes, where it occurs, the specific criminal charges, and the contexts within which profit-motivated police crime is punished through police agencies and the criminal courts.  相似文献   
976.
Evidence materials in a presumed suicide case were studied by a firearm examiner and a forensic chemist. The victim's body with double gunshot wounding in his forehead, a machine gun in the sustained fire mode with a silencer, and four cartridge cases were found. Examinations of the evidence, the case file studies, and experiments dedicated to the case were carried out. Relationships between the placement of cartridge cases and the gun were established using a fast camera. The distributions of gunshot residues on the evidence materials and within the comparative gunshot patterns were studied by means of optical and electron microscopy, X‐ray microanalysis, and infrared spectroscopy. The shooting distance was assessed to be 30 cm or more, whereas the greatest distance that could have been achieved by the victim himself was about 11–13 cm. The obtained results supported the version of homicide rather than suicide.  相似文献   
977.
Symbolic politics are often considered to be closely linked to an alarmist rhetoric, as well as to punitive crime policy initiatives. This article explores the symbolic dimension of the Swedish crime policy debate. Since Sweden is frequently depicted as an antithesis to punitive Anglophone societies, exploring symbolic politics in this setting might expand our understanding of what symbolic statements may consist of. The article analyses the electoral campaign preceding the Swedish general election of 2014, with the aim of identifying which symbolic statements occupy a central position in the debate through the use of a qualitative content analysis. This analysis reveals an ambiguous political rhetoric, comprising morally and emotionally charged condemnatory statements about getting tough on crime, as well as reformist and restrained references to expert knowledge and long-term solutions. On the one hand, these reformist statements strengthen the image of Swedish crime policy as being based on ideals such as rationality and humanity. On the other, they also serve to legitimize and obscure penal expansion.  相似文献   
978.
979.
Theory matters in crime prevention. Indeed, but this is hardly the full story. Crime prevention is oftentimes viewed as atheoretical—not grounded in the etiology of crime and offending. Reasons abound for this view, and the recent interest in an evidence-based approach to policy-making has been at the forefront. This article reviews the role that theory plays in modern day crime prevention, with a special focus on the three main crime prevention strategies: developmental, community, and situational. The review identifies a number of key challenges and opportunities for making theory more central to crime prevention. It suggests that the classification system employed in situational crime prevention has allowed for a more explicit connection between sound theory and prevention techniques, and may provide important lessons for developmental and community crime prevention.  相似文献   
980.
Educational attainment is a fundamental cornerstone to success throughout the life-course. As a result, ensuring that young people remain in school and are not truant is critical. Although the importance of truancy as a risk factor for many adverse outcomes, including crime, has been well-documented, much less methodologically rigorous work has been undertaken to evaluate potentially promising prevention and intervention strategies. This paper uses a randomized field trial method to test how a partnership between police and schools targeting truancy impacts offending in a sample of high-risk truanting young people. We find that the truancy intervention reduces offending and we discuss the implications for practice and directions for future research.  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