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   2554篇
  免费   45篇
各国政治   74篇
工人农民   224篇
世界政治   128篇
外交国际关系   108篇
法律   1635篇
中国共产党   1篇
中国政治   14篇
政治理论   404篇
综合类   11篇
  2022年   11篇
  2021年   18篇
  2020年   47篇
  2019年   38篇
  2018年   125篇
  2017年   56篇
  2016年   129篇
  2015年   69篇
  2014年   44篇
  2013年   181篇
  2012年   162篇
  2011年   122篇
  2010年   47篇
  2009年   61篇
  2008年   44篇
  2007年   53篇
  2006年   47篇
  2005年   417篇
  2004年   129篇
  2003年   48篇
  2002年   29篇
  2001年   40篇
  2000年   37篇
  1999年   31篇
  1998年   21篇
  1997年   16篇
  1996年   11篇
  1995年   12篇
  1994年   11篇
  1992年   29篇
  1991年   29篇
  1990年   37篇
  1989年   53篇
  1988年   39篇
  1987年   37篇
  1986年   36篇
  1985年   24篇
  1984年   23篇
  1983年   19篇
  1979年   15篇
  1978年   14篇
  1975年   16篇
  1974年   26篇
  1973年   14篇
  1972年   16篇
  1971年   20篇
  1970年   14篇
  1969年   9篇
  1968年   12篇
  1967年   9篇
排序方式: 共有2599条查询结果,搜索用时 31 毫秒
981.
Allele frequencies for the nine STRs included in the AmpFlSTR profiler plus kit (D3S1358, VWA, FGA, D8S1179, D21S11, D18S51, D5S818, D13S317 and D7S820) were estimated from a sample of 87 unrelated individuals living in the region of Macau, a territory located in the southeastern coast of China.  相似文献   
982.
Allele frequencies for seven STRs (CD4, CSF1PO, F13A01, FES/FPS, MBPB, TH01, TPOX) were estimated from samples (sized between 300 and 940) of unrelated individuals born in North Portugal.  相似文献   
983.
Estimation of the time of death is one of the most important problems for forensic medicine and law. Physical and chemical postmortem changes are evaluated together while estimating the time of death.In this study, in vitro storage and postmortem changes of white blood cells were aimed to be compared within the given postmortem interval, and a follow-up study was carried out. Blood smears which were obtained from 10 non-refrigerated cadavers (experimental group) and from 40 hospital patients (control group) have been evaluated to observe and compare changes during the in vitro storage and postmortem degenerative morphological changes that white blood cells undergo throughout the given postmortem intervals. The samples were examined by using a light microscope, and blood cells were differentiated by staining blood films with May-Grunwald stain, followed by Giemsa stain. Identifiable degenerated eosinophils and monocytes were first examined at 6h of death and the in vitro storage, and they were unidentifiable beyond 72 h of storage. Identifiable degeneration of neutrophils were first examined at 6h of death and storage while unidentifiable beyond 96 h of storage. Identifiable degeneration of lymphocytes were first examined at 24h of death, and they were still identifiable beyond 120 h.Cellular changes of leukocytes can be useful in the 6-120 h for estimating the time of in vitro storage, and the findings match during the first 21 h for both experimental and control groups. Finally, this follow-up study and the comparison will also be carried out for a longer postmortem interval, and other specific hypothesis that relate cellular changes in tissues other than blood with time since death are various points that needs to be studied.  相似文献   
984.
985.
During the last decade, the phenomenon of citizen watches has become a common and meaningful element in citizen participation that aims to improve local public safety. This paper discusses citizen watches as a manifestation of the way citizens and state agencies are redefining and transforming their relationships. It examines the question of the extent to which citizen watches can be seen as examples of good citizenship. The Dutch government is currently appealing strongly for more citizen involvement in public matters, but is unclear about the kind of involvement it expects. The paper argues that citizen watches are mainly considered manifestations of ‘good citizenship’ by the government if they are set up in line with state objectives and are willing to serve as an auxiliary of the formal authorities in the neighborhood. Many citizen watches are therefore products of self-responsibilization processes, which have not yet received much academic attention.  相似文献   
986.

Objectives

The present study focused on the sustainability of the effects of Multisystemic Therapy (MST) on delinquency and recidivism.

Methods

A sample of 256 juveniles with severe and persistent antisocial behavior were randomly assigned to MST (147) and Treatment As Usual (TAU) (109) condition. Pre-test assessment took place before the start of MST/control group treatment. Post-test assessment took place at 6 months after termination of the program. Delinquency (parent and adolescent reported) was assessed 6 months after termination of the treatment. Official judicial data were collected to assess recidivism, with a mean length of follow-up of 3.06 years. ANCOVAs and survival analyses were used to test the effectiveness of MST.

Results

The multi-informant data showed that MST is effective in diminishing delinquent behavior as reported by adolescents and parents, with d’s larger than at post-test assessment immediately after ending of the intervention. The official judicial data, however, suggest that there are no differences between MST and TAU in recidivism. Few and inconsistent moderator effects were found.

Conclusions

According to parent and adolescent reports, the beneficial effects of MST were sustained at the follow-up. This was not supported by official data. These results stress the importance of using multi-informant data on delinquency, as each source of information has its own advantages and disadvantages.  相似文献   
987.
Hillman  Arye L.  Van Long  Ngo 《Public Choice》2022,190(1-2):149-174
Public Choice - Immigration policies in western democracies have often been contrary to the predictions of the mainstream theory of international economics. Political parties that are predicted to...  相似文献   
988.
Crime, Law and Social Change - Criminological literature has often pointed to the absence or weakness of existing international regulation as important explanatory factors of corporate crime in...  相似文献   
989.
Crime, Law and Social Change - This paper explores the legal challenges of combating cybercrime in Vietnam. We used a legal doctrine method to review the updated Vietnamese legal frameworks,...  相似文献   
990.
Adrian Van Deemen 《Public Choice》2014,158(3-4):311-330
Condorcet’s paradox occurs when there is no alternative that beats every other alternative by majority. The paradox may pose real problems to democratic decision making such as decision deadlocks and democratic paralysis. However, its relevance has been discussed again and again since the celebrated works of Arrow (Social choice and individual values, 1963) and Black (The theory of committees and elections, 1958). The discussion varies from one extreme to the other: from very relevant to practically irrelevant. This paper tries to bring more clarity to the discussion by reviewing the literature on the empirical relevance of Condorcet’s paradox. Since a definition of the paradox for even numbers of voters and alternatives, and for weak voter preferences is missing in the literature, we first define the paradox clearly and simply. Then, three topics are investigated, namely domain conditions, culture and the likelihood of the paradox, and the empirical detection of the paradox. Domain conditions express regularities in voter-preference profiles that prevent the paradox. Frequent observations of these domain conditions would make Condorcet’s paradox empirically less important. Cultures define probability distributions over the set of voter preferences. Observation of cultures might be a first step to indicate the relevance of the paradox. The empirical detection of the paradox speaks for itself; we will try to identify the number of observations of the paradox so far. The overall conclusion is that the empirical relevance of Condorcet’s paradox is still unsettled.  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