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   1865篇
  免费   116篇
各国政治   167篇
工人农民   118篇
世界政治   223篇
外交国际关系   138篇
法律   993篇
中国政治   5篇
政治理论   323篇
综合类   14篇
  2023年   24篇
  2022年   17篇
  2021年   34篇
  2020年   61篇
  2019年   85篇
  2018年   112篇
  2017年   128篇
  2016年   124篇
  2015年   81篇
  2014年   116篇
  2013年   331篇
  2012年   99篇
  2011年   82篇
  2010年   51篇
  2009年   38篇
  2008年   70篇
  2007年   84篇
  2006年   58篇
  2005年   41篇
  2004年   57篇
  2003年   41篇
  2002年   31篇
  2001年   31篇
  2000年   30篇
  1999年   17篇
  1998年   17篇
  1997年   8篇
  1996年   6篇
  1995年   13篇
  1994年   7篇
  1993年   10篇
  1992年   6篇
  1991年   7篇
  1990年   7篇
  1989年   4篇
  1987年   6篇
  1986年   2篇
  1985年   4篇
  1984年   6篇
  1983年   2篇
  1982年   3篇
  1977年   2篇
  1976年   2篇
  1975年   2篇
  1974年   4篇
  1972年   4篇
  1971年   2篇
  1967年   3篇
  1966年   2篇
  1965年   2篇
排序方式: 共有1981条查询结果,搜索用时 15 毫秒
31.
32.
Élites in Omsk     
A French sociologist provides a detailed analysis of the politics, economics, and political elite of Omsk oblast' in Western Siberia. Analysis covers oil politics, reactions to the August 1998 financial crisis, relations with Moscow, the role of entrepreneurs in politics, and the communist and nationalist oppositions. Focus is on the role of the governor and his relations with diverse political forces. The article also examines the gap between formal institutions and actual social and political practices.  相似文献   
33.
34.
35.
Ammonium nitrate fuel oil is an explosive mixture found in most antipersonnel landmines (APL) buried throughout the Colombian territory. During more than 50 years of internal conflict, the Colombian government has found that trained dogs are the most effective method to detect APL. However, the olfactive signature in ANFO is unknown and also if there are differences in detection related to the explosive manufacturing origin. Therefore, this work begins with the analytical validation of the method used to determine ammonia, in its derivatized form as carbamate, released by home-made ANFO using HS-SPME-GC-FID. Once validated, the method was used to identify ammonia and other organic volatile compounds present in ANFO, under laboratory and simulated field conditions. The validation process includes the evaluation of the optimum conditions for the derivation and extraction of butylcarbamate, the determination of the working ranges with linear response in FID, the limits of detection and quantification, the sensitivity, and the precision. The results of the validation established linearity and sensitivity in a concentration between 20 and 120 mg/L, as well as low limits of detection and quantification of 6.4 and 21.4 mg/L, respectively. Also, an intermediate precision of 11% for butylcarbamate with a repeatability of 8%. The validated method showed in real samples of home-made ANFO besides ammonia, the presence of low molecular methylamines, and also exhibited differences in volatile compositions according to the origin. The objective of this work is to offer a reliable analytical methodology for the extraction and analysis of volatile compounds from ANFO.  相似文献   
36.
Gunshot residue (GSR) analysis and their interpretation provide crucial information on a criminal investigation involving the use of firearms. To date, several approaches have been proposed for the implementation of a combined sampling and analysis of inorganic (IGSR) and organic GSR (OGSR). However, it is not clear at this stage if concurrent analyses of both types of residue might be detrimental to the analysis of IGSR currently applied in forensic laboratories. Thus, this work aims to compare and evaluate three different protocols for the combined collection and analysis of IGSR and OGSR. These methods, respectively, involve the use of a modified stub (with two halves, one for the detection of IGSR and the other for the analysis of OGSR); the sequential recovery of GSR with two stubs mounted with different adhesives (double-sided carbon tape and Tesa® TACK) and the sequential analysis of IGSR and OGSR from a single carbon stub following carbon deposition. The detection of IGSR was carried out using SEM-EDX, while OGSR analysis was performed using ultra-high-performance liquid chromatography–tandem mass spectrometry (UHPLC-MS/MS). Obtained results for experiments performed using Geco Sinoxid® ammunition indicated that sequential analysis was the most suitable protocol for the combined collection and analysis of both IGSR and OGSR. A higher number of inorganic (characteristic and consistent) particles and higher concentrations of ethylcentralite, N-nitrosodiphenylamine, diphenylamine, and nitroglycerin were recovered with this method.  相似文献   
37.
Humanitarian organisations respond to increasing donor requests to assess economic aspects of their programmes, including cost-effectiveness. This article presents results from a survey of humanitarian agency staff and donor agencies, investigating such requests. Findings indicate a need for clear guidelines and capacity building in these economic assessments, expressed by both humanitarian staff and donor agencies themselves. While improving efficiency is important to ensure effective humanitarian response, caution is warranted in adopting overly burdensome and complex assessments of efficiency which are poorly understood by staff requesting and responding to them, the outcomes of which may lead to reductive and decontextualised decision-making.  相似文献   
38.
Abstract

Scalability can be understood as the ability to expand without changing. Yet, expanding an intervention to a global scale, we suggest, is a significant and difficult accomplishment. In this paper we propose to explore the kind of evidential exigencies that this accomplishment involves. To do so, we focus on the field of global health and examine how child immunization against the pneumococcus bacterium has been scaled up in low-income countries. The paper first attends to initial epidemiological scrutiny that revealed the existence of a large-scale public health problem and the possibility of an expandable solution (vaccination). It then describes the set-up of a funding arrangement using overseas aid to purchase vaccine doses manufactured by pharmaceutical companies, before paying attention to various frictions that affect the widespread use of pneumococcal vaccines. In these different moments through which scalability is accomplished, always partially and temporarily, we show that a dual activity can be witnessed, a pivoting between referential work and forward projection. To conclude, we suggest that scalability is more usefully approached as a form of expansion that is always attentive to the possibilities of change.  相似文献   
39.
Abstract

This paper explores an example of global politics in action by attending to the modalities and outcomes of United Nations negotiations on global warming. More precisely, the paper ethnographically traces how the capacity of tropical forests to act as carbon sinks is turned into a matter of global concern. The focus is on a negotiated policy called Reducing Emissions from Deforestation and forest Degradation (REDD+) and its anchoring in the Democratic Republic of the Congo, whose territory contains the second largest area of rainforest after Brazil. The paper discusses the importance of the promissory in climate actions, the multivalence of what is at stake and the porosity and resilience of national demarcation. To do so, it identifies three moments and sites of geopolitical re-composition: the formulation of international consensus, the work of preparatory agents and the quest for metrological inclusiveness. These moments and sites point to the theatricality and semi-secrecy of United Nations negotiations, the mobilizing activities of expatriate consultants hired with overseas aid funding and the unstable evidential grounds on which emission reduction efforts are based. The paper suggests that, through this series of processes, the carbon stored by tropical forests becomes a matter of global exigency.  相似文献   
40.
This paper deals with the long-term evolution of dock labor in Dakar. Through the utilization of archival sources and their analysis, this investigation explores the changes that occurred in this sector and primarily the reform plan developed during the world wars but that was never introduced into the labor regulations, mainly due to the colonial regime. In addition, this paper studies the legal changes since the 1970s when the dockers’ statute was settled. Furthermore, this research uses oral testimony from retired Senegalese dockers to study the way these workers observed these structural changes. It is the first time that this topic has been explored for the port of Dakar from a historical long-term perspective.  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