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   89篇
  免费   6篇
各国政治   8篇
工人农民   5篇
世界政治   11篇
外交国际关系   4篇
法律   50篇
中国政治   1篇
政治理论   12篇
综合类   4篇
  2023年   1篇
  2022年   1篇
  2021年   3篇
  2019年   3篇
  2018年   3篇
  2017年   6篇
  2016年   3篇
  2015年   7篇
  2014年   3篇
  2013年   13篇
  2012年   2篇
  2011年   4篇
  2010年   5篇
  2009年   6篇
  2008年   2篇
  2007年   1篇
  2006年   3篇
  2005年   4篇
  2004年   6篇
  2003年   6篇
  2002年   1篇
  2000年   1篇
  1999年   2篇
  1998年   2篇
  1996年   1篇
  1983年   1篇
  1982年   1篇
  1981年   1篇
  1976年   1篇
  1974年   1篇
  1971年   1篇
排序方式: 共有95条查询结果,搜索用时 31 毫秒
71.
Efforts at providing relevant indices of incentive structure, comparative advantage and international competitiveness have led to the concept of true protection. Such a framework can be used to analyse the incidence of protection across sectors. Analysis has so far been carried out under the assumption of a uniform tariff, and calculations limited to average rates; nothing could then be said with respect to the incidence at the firm or product level. This article expands on an existing model by (1) presenting firm‐ and product‐specific true protection indices, (2) generalising previous conclusions on true protection to encompass firm‐ and product‐specific analysis. It is shown that failure to take into consideration substitution possibilities may yield incorrect evaluation of the structure and level of protection.  相似文献   
72.
73.
74.
Gas chromatographic analysis with electron capture detection is very sensitive to post-blast residues and useful for the determination of organic explosive molecules. But many compounds extracted from the matrices may interfere with the explosives. Using SPME, most interfering compounds are eliminated so the identification is easier. Another advantage of the technique is a low limit of detection. In this study, four different SPME fibers were tested to analyze the most common encountered organic explosives including nitro aromatics, nitramines and nitro-esters. Different parameters were tested (desorption time, agitation, ...) and a special device has been created to optimize the agitation. Direct desorption effect of the SPME fiber on the column compared to normal split-splitless injection is shown. In this way, the degradation of the most sensitive molecules is decreased. An application to a real case is also described in this paper.  相似文献   
75.
76.
Exit,Voice, and Mimicking Behavior: Evidence from Swiss Cantons   总被引:1,自引:0,他引:1  
Previous empirical literature hasshown that in order to overcome agencyproblems voters make inter-jurisdictionalcomparisons of fiscal performance whenmaking electoral decisions. Incumbents therefore anticipate voters'feedback by copying fiscal policy decisionsfrom neighbors. This paper argues thatfiscal autonomy (exit) as well as directlegislation (voice) enrich politicalcompetition, reducing thus the influence of electoral competition onfiscal decisions. Consequently, policymimicking does not matter in circumstancesof direct legislation and fiscal autonomywhere the impact of voters on the politicalagenda is particularly strong. Based onpanel data between 1980 and 1998 we findencouraging evidence supporting ourtheoretical arguments.  相似文献   
77.
78.
This study examines a sample of 136 male and female juveniles charged with attempted homicide or homicide. The purpose of this study is to explore the differences between nondirect file male and female juvenile homicide offenders regarding individual, family, and crime circumstances. Findings suggest that compared to male juvenile offenders, female juvenile homicide offenders have higher rates of reported childhood abuse, more serious substance abuse, and mental health problems including suicidal ideations, depression, anxiety, anger, and irritability. Male juvenile homicide offenders reported higher rates of substance use than their female counterparts but the females had more serious substance abuse problems. Female juveniles were found to more often kill a person known to them and male homicide offenders were found to more often kill a stranger. These findings suggest strongly that male and female juvenile homicide offenders are dissimilar and require unique assessment and treatment.  相似文献   
79.
During legal proceedings following the unexpected death of an infant, the magistrate calls on an expert to clarify the causes of death and to decide on the course to be taken. A report was made following the death of a 7‐month‐old baby girl after recovery from cardiac arrest when investigations of the cause revealed a subdural hematoma (SDH). We discuss the interconnection of these two entities and their role in the lethal process. In this infant, two distinct lesions with medicolegal implications were simultaneously present: on the one hand histiocytoid cardiopathy, and on the other hand SDH, which could result from ill‐treatment. The case of this infant reminds us that the role of the pediatrician is to report the suspicion, whereas the role of the medical expert is to inform the magistrate as to the reality of abuse and its implication in the lethal process.  相似文献   
80.
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