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   3880篇
  免费   577篇
各国政治   587篇
工人农民   147篇
世界政治   500篇
外交国际关系   268篇
法律   1630篇
中国政治   59篇
政治理论   1223篇
综合类   43篇
  2023年   11篇
  2022年   7篇
  2021年   37篇
  2020年   65篇
  2019年   199篇
  2018年   148篇
  2017年   206篇
  2016年   219篇
  2015年   179篇
  2014年   181篇
  2013年   928篇
  2012年   136篇
  2011年   166篇
  2010年   160篇
  2009年   118篇
  2008年   133篇
  2007年   112篇
  2006年   108篇
  2005年   75篇
  2004年   119篇
  2003年   77篇
  2002年   77篇
  2001年   53篇
  2000年   68篇
  1999年   56篇
  1998年   65篇
  1997年   60篇
  1996年   46篇
  1995年   56篇
  1994年   53篇
  1993年   59篇
  1992年   40篇
  1991年   33篇
  1990年   36篇
  1989年   36篇
  1988年   36篇
  1987年   32篇
  1986年   32篇
  1985年   35篇
  1984年   28篇
  1983年   21篇
  1982年   16篇
  1981年   23篇
  1980年   25篇
  1979年   15篇
  1978年   11篇
  1977年   16篇
  1976年   10篇
  1974年   8篇
  1973年   7篇
排序方式: 共有4457条查询结果,搜索用时 15 毫秒
1.
Fatal fall from a height initiated with a swinging motion on the sagittal plane of the victim's body is examined. Method of analytical mechanics is adopted to establish the functional relations between the swinging angle of the body and the force needed to sustain the body until release, and the amount of the horizontal displacement that would occur after release. The analysis is applied to support an expert opinion presented in a criminal court in which two accused were convicted of murder for dropping a female victim from a bridge. The results indicate that it is unlikely for the body to locate as recorded by the police investigation report in the case. This study demonstrates that a straightforward mechanical analysis can be utilized to examine uncommon falling scenarios.  相似文献   
2.
Technology transfer has generally had little impact on the assistive technology industries serving small, highly fragmented “disability markets.” Persons with disabilities often require specialized, relatively sophisticated technology. Third-party payer reimbursement rates and the low levels of disposable income among disability populations often cap product pricing. Transferring technology to these industry segments therefore poses special challenges. In October 1998, the Rehabilitation Engineering Research Center on Technology Transfer initiated the “Demand-Pull Project on Wheeled Mobility.” Successful transfers resulting from this project demonstrate that a systematic technology transfer process can be successfully applied to industries serving specialized and underserved niche markets.  相似文献   
3.
4.
5.
6.
Past research has largely ignored the developmental changes within the child that account for the association between parenting and risk for delinquency. We used structural equation modeling and data from a longitudinal study of several hundred African‐American families to test the contentions of various theories regarding the sociocognitive and emotional factors that mediate the impact of parental behavior on a youth's risk for delinquency. Our findings largely supported the theories. The impact of monitoring/discipline was indirect through low self‐control and acceptance of deviant norms, whereas the effect of hostility/ rejection was indirect through low self‐control, hostile view of relationships, and acceptance of deviant norms. These two dimensions of parenting were no longer related either to affiliation with deviant peers or to conduct problems once the effects of these psychological characteristics were taken into account; the impact of these parenting practices was completely mediated by these four cognitive/affective variables. Contrary to expectation, however, these psychological factors did not mediate any of the relationship between caretaker involvement in antisocial behavior and child conduct problems.  相似文献   
7.
This paper argues that corruption is a product of self-aggrandizement; of unrealistically low remuneration which makes it impossible for public servants to live within their legitimate means; and of a closed political system which inevitably tends to exclude aggregated interests'. Corruption leads to loss of much needed revenue and human talent for development, distorts priorities for public policy, and shifts scarce resources away from the public interest. The mutual distrust that results among the different sections of society, and the growth of despondency in the general public, are incompatible with the requirements for successful public policy. The main theme running through the paper is that political instability, corruption and underdevelopment are mutually reinforcing. The paper finally outlines certain measures that need to be taken in order to clear the path for sustained growth and development.  相似文献   
8.
This article examines constraints in development bureaucracies in intensifying the use of microcomputers as they move beyond processing applications to analysing applications. The work is based on the experience of several ministries of the Government of Kenya. Processing applications involve throughput of data and are relatively simple. Analysing applications, in contrast, are more complex and include data assembly, sensitivity analysis, and modelling. The article argues that processing applications are more compatible with the administrative cultures, bureaucratic functions, personnel skill levels and organizational structures of development bureaucracies. Analysing applications are less compatible because they require a level of training and motivation uncommon in development bureaucracies. Analysing applications are further thwarted by constraints in the supply of relevant information and the lack of demand for analysis by decision-makers. A four-cell matrix is developed which explains these constraints. The article concludes with several recommendations for encouraging microcomputer-based analysis, but cautions that processing applications will continue to dominate for the foreseeable future.  相似文献   
9.
10.
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