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   215篇
  免费   3篇
  218篇
  2020年   3篇
  2019年   6篇
  2018年   9篇
  2017年   7篇
  2016年   6篇
  2015年   5篇
  2014年   3篇
  2013年   100篇
  2012年   2篇
  2010年   1篇
  2009年   1篇
  2008年   3篇
  2007年   1篇
  2006年   2篇
  2005年   1篇
  2001年   2篇
  2000年   1篇
  1999年   2篇
  1998年   4篇
  1997年   5篇
  1996年   5篇
  1995年   4篇
  1994年   3篇
  1993年   3篇
  1992年   3篇
  1991年   3篇
  1990年   4篇
  1989年   3篇
  1988年   3篇
  1987年   1篇
  1986年   4篇
  1985年   1篇
  1984年   2篇
  1982年   3篇
  1980年   2篇
  1975年   2篇
  1973年   1篇
  1972年   1篇
  1971年   1篇
  1968年   2篇
  1967年   2篇
  1966年   1篇
排序方式: 共有218条查询结果,搜索用时 15 毫秒
31.
Abstract

‘[Sovereignty] is possible only within the framework of multinational communities, of common institutions designed to provide common responses to common challenges. Security is no longer attainable in the traditional way. Neither the walled city nor the nation-state can provide protection against attack or threats of physical destruction… Increasingly the politics of nations revolve around the careful management of interdependence.’  相似文献   
32.
33.
In this article, I analyze the use of historical counterfactuals in the Campaign of 1815 by Carl von Clausewitz (1780–1831). Such is the importance of counterfactuals in this work that its gist can be given in a series of 25 counterfactuals. I claim that a central role is played by evaluative counterfactuals. This specific form of counterfactuals is part of a didactic method that allows Clausewitz to teach young officers a critical method that prepares them for the challenge of decision-making in real warfare. I conclude with the enduring relevance of Clausewitz’s use of evaluative counterfactuals for contemporary military historiography.  相似文献   
34.
This article examines the tradition of Italian neorealism and the importance it has for films depicting guerrilla insurgencies. It looks in particular at the two films by Roberto Rossellini Rome Open City and Paisa as well as the later film by Nanni Loy Four Days in Naples. It then proceeds to locate Gillo Pontecorvo's iconic film The Battle of Algiers within this neorealist tradition and examines the degree to which the director succeeded in continuing the basic traditions of neorealism into the context of the Algerian war of Independence. The article concludes that while this film remains of great interest it should be situated in the period when it was produced and is in many ways radically disconnected from many insurgent movements of the present day.  相似文献   
35.
Afghanistan's fifth effort to form a central army started in 2002, following the fall of the Taleban regime. Mainly run by the US armed forces, the formation of the so-called ‘Afghan National Army’ run into several difficulties, ranging from initially slow recruitment, low educational level of troops and officers, high attrition rates. As the new army began to take shape, it lacked many of the characteristics which had been associated by the promoters with a ‘national’ army. It also showed a low level of commitment and a lax discipline. As of 2006, it looked more like an auxiliary force at the service of the US army and its allies than like a ‘national’ army.  相似文献   
36.
This paper examines the impact of military expenditure on economic growth on a large balanced panel, using an exogenous growth model and dynamic panel data methods for 106 countries over the period 1988–2010. A major focus of the paper is to consider the possibility group heterogeneity and non-linearity. Having estimated the model for all of the countries in the panel and finding that military burden has a negative effect on growth in the short and long run, the panel is broken down into various groupings based upon a range of potentially relevant factors, and the robustness of the results is evaluated. The factors considered are different levels of income, conflict experience, natural resources abundance, openness and aid. The estimates for the different groups are remarkably consistent with those for the whole panel, providing strong support for the argument that military spending has adverse effects on growth. There are, however, some intriguing results that suggest that for certain types of countries military spending has no significant effect on growth.  相似文献   
37.
A large literature has used tests for Granger (1969) non‐causality, GNC, to examine the interaction of military spending with the economy. Such tests answer a specific although quite limited question: can one reject the null hypothesis that one variable does not help predict another? If one can reject, there is said to be Granger causality, GC. Although the limitations of GNC tests are well known, they are often not emphasised in the applied literature and so may be forgotten. This paper considers the econometric and methodological issues involved and illustrates them with data for the US and other countries. There are three main issues. First, the tests may not be informative about the substantive issue, the interaction of military expenditure and the economy, since Granger causality does not correspond to the usual notion of economic causality. To determine the relationship of the two notions of causality requires an identified structural model. Second, the tests are very sensitive to specification. GNC testing is usually done in the context of a vector autoregression, VAR, and the test results are sensitive to the variables and deterministic terms included in the VAR, lag length, sample or observation window used, treatment of integration and cointegration and level of significance. Statistical criteria may not be very informative about these choices. Third, since the parameters are not structural, the test results may not be stable over different time periods or different countries.  相似文献   
38.
39.
The reformulation‐linearization technique (RLT) is a methodology for constructing tight linear programming relaxations of mixed discrete problems. A key construct is the multiplication of “product factors” of the discrete variables with problem constraints to form polynomial restrictions, which are subsequently linearized. For special problem forms, the structure of these linearized constraints tends to suggest that certain classes may be more beneficial than others. We examine the usefulness of subsets of constraints for a family of 0–1 quadratic multidimensional knapsack programs and perform extensive computational tests on a classical special case known as the 0–1 quadratic knapsack problem. We consider RLT forms both with and without these inequalities, and their comparisons with linearizations derived from published methods. Interestingly, the computational results depend in part upon the commercial software used. © 2009 Wiley Periodicals, Inc. Naval Research Logistics, 2010  相似文献   
40.
This paper considers the problem of locating multiple new facilities in order to minimize a total cost function consisting of the sum of weighted Euclidean distances among the new facilities and between the new and existing facilities, the locations of which are known. A new procedure is derived from a set of results pertaining to necessary conditions for a minimum of the objective function. The results from a number of sample problems which have been executed on a programmed version of this algorithm are used to illustrate the effectiveness of the new technique.  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