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   2782篇
  免费   492篇
  国内免费   165篇
  2024年   3篇
  2023年   7篇
  2022年   28篇
  2021年   37篇
  2020年   39篇
  2019年   66篇
  2018年   57篇
  2017年   106篇
  2016年   121篇
  2015年   79篇
  2014年   232篇
  2013年   288篇
  2012年   187篇
  2011年   234篇
  2010年   184篇
  2009年   226篇
  2008年   163篇
  2007年   198篇
  2006年   177篇
  2005年   172篇
  2004年   162篇
  2003年   123篇
  2002年   79篇
  2001年   85篇
  2000年   53篇
  1999年   45篇
  1998年   33篇
  1997年   36篇
  1996年   40篇
  1995年   29篇
  1994年   31篇
  1993年   20篇
  1992年   24篇
  1991年   21篇
  1990年   25篇
  1989年   16篇
  1988年   10篇
  1987年   2篇
  1975年   1篇
排序方式: 共有3439条查询结果,搜索用时 187 毫秒
911.
对因素权重为实数、因素状态值为模糊数的多因素不确定性决策问题,由实数型状态变权向量导出模糊数状态变权向量,得出模糊数变权公式,建立模糊数变权综合决策模型,最后给出一个应用模糊数变权综合决策模型的实例.  相似文献   
912.
基于数形结合方法以及变量代换方法发现计算卷积公式存在某些不足之处,研究卷积公式的计算方法,给出一种新的确定积分限的方法.该方法直观明了、容易理解和掌握并且可操作性强,有效避免作图和分析图形的繁琐,并举例说明了该应用方法.  相似文献   
913.
In contrast with a widespread perception of Russia as an expansionist power in the Arctic, this article argues that Moscow does not seek military superiority in the region. Rather, Moscow's military strategies in the Arctic pursue three major goals: first, to demonstrate and ascertain Russia's sovereignty over its exclusive economic zone and continental shelf in the region; second, to protect its economic interests in the High North; and third, to demonstrate that Russia retains its great power status and still has world-class military capabilities. The Russian military modernization programs are quite modest and aim at upgrading the Russian armed forces in the High North rather than providing them with additional offensive capabilities or provoking a regional arms race. The Russian ambitions in the Arctic may be high, but they are not necessarily implying the intentions and proper capabilities to confront other regional players by military means. On the contrary, Moscow opts for soft rather than hard power strategy in the Arctic.  相似文献   
914.
Some of the most active arms races are taking place between developed and less developed countries. The inability of less developed countries to compete financially, as well as technologically, with developed countries may be forcing the former to acquire terror weapons (TWP). The Iran–Iraq war in the 1980s and the events of 9/11 proved that the use of TWP is no longer a mere threat; there are several organizations and countries that will not hesitate to use them. This study develops a model of resource allocation in an arms race between a developed country that is characterized by state‐of‐the‐art technology and high GDP, and a less developed country whose technological capability and GDP are much lower. The model is used to predict the optimal mix of weapons of the two countries that are engaged in the arms race. Applying the model to the arms race between Israel and Syria demonstrates its use.  相似文献   
915.
We explore the impact of strategic assessment efforts on military organizations at war. To do so, we construct a model to explore the impact of a principal’s choice among imperfect performance metrics for a military operation. In doing so, the principal must consider both the incentivizing and informational properties of the metric. We show the conditions under which uncertainty regarding the nature of the agent, as well as uncertainty regarding the operational environment, drives a metric choice that induces pathological behavior from the agent. More specifically, a poor metric choice can create an overly optimistic assessment and end up prolonging the conflict. We illustrate the model’s insights in the cases of World War II and the Vietnam War.  相似文献   
916.
Abstract

This paper examines the impact of civil war on military expenditure. We employ two measures of military expenditure: the share of military expenditure in general government expenditure and the logarithm of military expenditures. We would reasonably expect a priori that military expenditure as a share of general government expenditure increases during a civil war and that such increases would taper off over the duration of a civil war. We also explore whether the termination of a civil war induces a decline in the share of military expenditure as a share of the general government expenditure in the short-run. We find evidence the of share of military expenditure increases during a civil war and falls in the year succeeding the end of a civil war, and, in particular, if a war ends in a peace treaty. The level of military expenditures, however, rises during civil wars and does not appear to decline in the short-term after the end of a civil war.  相似文献   
917.
Abstract

This paper examines the nexus between the Japanese strategy and economic–industrial mobilization during the period 1937–1945. From 1937 to December 1941, the country was engaged in a land war of attrition in China. This war requested an immense amount of resources and was associated with armaments procurement strategy with emphasis in the army. However, the Japanese strategic vision assumed that the state was strong enough to engage in one land war against China and in a naval war in the Pacific simultaneously. The basis of Japanese strategy was a utopia. Making things worse, the naval war in the Pacific was conducted against the most industrialized powers in the world [the US and the British Empire (Britain, Australia, India, etc.)]. Finally, the internal Japanese industrial mobilization was associated with immense errors in armaments production (absence of economies of scale and scope, limited raw materials, etc.). Under these circumstances, the defeat was an expected outcome.  相似文献   
918.
In the ten years since the establishment of South Africa's first inclusive democratic government, an ambitious, extensive and systematic process of reform has been carried out in the governance of security. The process is widely regarded as having been successful and a model for other processes of ‘security sector reform’ in the context of transitions from authoritarian forms of governance to democratic ones.

That this been achieved with hardly a shot fired in anger is a remarkable achievement and a credit to visionary political leadership as well as organisational capacity, in other words to effective security governance.

At the same time, progress has been uneven and sometimes fragmentary, policy intentions and commitments have not always been translated into practice, the end results have not been to everyone's liking, and transformation has engendered its own pathologies. Thus several challenges remain in improving security governance.

This article provides a broad overview of the roles played by the various actors in the governance of the security sector, including the executive, parliament and civil society. It examines the main policy frameworks and touches on organisational transformation, because it is impossible to deal with governance in isolation from these issues. Policy processes and the frameworks they give rise to—in particular—are critical for effective governance. This article deals with the defence, safety and security and intelligence fields. A comprehensive overview would need to include the governance of criminal justice and foreign policy. The article does not seek to make an overall evaluation of governance, but to identify achievements, shortfalls and challenges.  相似文献   
919.
This article revisits Zimbabwe's land question from the vantage point of having been written five years after the ‘fast-track’ land redistribution programme was launched. Without belittling the accomplishments of land reform in the first 19 years of the country's independence, it is generally clear that the sweeping programme of 2000–2003, the most comprehensive of its kind, created a new paradigm. Clearly, the consequences will take many years to work themselves out through the country's political, economic and social fabric.

The article briefly defines what may be termed ‘old’ and ‘new’ versions of Zimbabwe's land question before outlining the salient aspects of the reform process itself. It then assesses the outcomes of the redistribution, the apparent lacuna between ‘land’ and ‘agrarian’ reform, and the debate that the reform process itself has kindled. Transforming land distribution into qualitative agrarian reform has proved an Achilles heel in the arguments put forward by the proponents of the fast-track programme. Finally, recommendations are provided as to what is necessary to secure land and agrarian reform in the short, medium and long term.  相似文献   
920.
Much is made in the security sector reform literature of the role of civil society as an overseer and monitor of the security sector, contributing to improved accountability and governance. This paper looks at how the notion of ‘civil society capacity’ needs to be disaggregated in order to develop meaningful strategies to assist civil society organisations to impact security sector reforms in complex, post-conflict contexts like the Democratic Republic of Congo. It draws on fieldwork conducted with 200 Congolese civil society groups that are attempting to engage in current security sector reform processes, and looks at which capacities are required to improve oversight by civil society groups.  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