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   756篇
  免费   25篇
  国内免费   1篇
  2021年   15篇
  2019年   27篇
  2018年   14篇
  2017年   16篇
  2016年   16篇
  2015年   15篇
  2014年   15篇
  2013年   151篇
  2012年   7篇
  2011年   7篇
  2009年   8篇
  2008年   8篇
  2007年   9篇
  2006年   9篇
  2005年   11篇
  2004年   10篇
  2003年   9篇
  2002年   9篇
  2000年   9篇
  1998年   10篇
  1997年   17篇
  1996年   12篇
  1994年   14篇
  1993年   11篇
  1992年   10篇
  1991年   20篇
  1990年   6篇
  1989年   13篇
  1988年   12篇
  1987年   17篇
  1986年   14篇
  1985年   15篇
  1984年   10篇
  1983年   13篇
  1982年   12篇
  1981年   9篇
  1980年   14篇
  1979年   15篇
  1978年   13篇
  1977年   10篇
  1976年   14篇
  1975年   18篇
  1974年   12篇
  1973年   19篇
  1972年   11篇
  1971年   10篇
  1970年   11篇
  1969年   8篇
  1968年   9篇
  1967年   8篇
排序方式: 共有782条查询结果,搜索用时 15 毫秒
151.
152.
153.
154.
155.
In this paper, we examine the current state of knowledge in the economics literature on the conduct of reconstruction activities in Iraq and Afghanistan. As stabilisation and reconstruction missions grow in importance for units deployed to these regions, it becomes more important to understand what activities can promote economic growth at the local level. While military operations focus on interdicting the insurgency, successful counter-insurgency campaigns have typically addressed the conditions conducive to the insurgency. Mitigating the incentives for individuals to participate in an insurgency is imperative. Well-crafted and timed reconstruction activities can, we argue, attenuate these incentives.  相似文献   
156.
The belief that the insurgency in southern Afghanistan is a singular entity and the assumption that negotiations with that entity can bring an end to the conflict are simplistic and do not take into account the other insurgent partners, nor the role of local power brokers. Care must be taken when providing advice in the public domain on how to end or limit conflict in Afghanistan.  相似文献   
157.
158.
159.
Demand forecasting performance is subject to the uncertainty underlying the time series an organization is dealing with. There are many approaches that may be used to reduce uncertainty and thus to improve forecasting performance. One intuitively appealing such approach is to aggregate demand in lower‐frequency “time buckets.” The approach under concern is termed to as temporal aggregation, and in this article, we investigate its impact on forecasting performance. We assume that the nonaggregated demand follows either a moving average process of order one or a first‐order autoregressive process and a single exponential smoothing (SES) procedure is used to forecast demand. These demand processes are often encountered in practice and SES is one of the standard estimators used in industry. Theoretical mean‐squared error expressions are derived for the aggregated and nonaggregated demand to contrast the relevant forecasting performances. The theoretical analysis is supported by an extensive numerical investigation and experimentation with an empirical dataset. The results indicate that performance improvements achieved through the aggregation approach are a function of the aggregation level, the smoothing constant, and the process parameters. Valuable insights are offered to practitioners and the article closes with an agenda for further research in this area. © 2013 Wiley Periodicals, Inc. Naval Research Logistics 60: 479–498, 2013  相似文献   
160.
This study examines the war that the United States has waged since September 2001 as a global counterinsurgency. Placing the war against al-Qaeda and its allied groups and organizations in the context of a global insurgency also presents implications for doctrine, interagency coordination and military cultural change. The first part of the article offers a distilled analysis of al-Qaeda and its associated networks. The second section examines the US military in the context of the Western way of war, with the attendant military-cultural impediments to adapting to an enemy who embraces a very different approach to war. The third section aims to define and describe the nature of the war that America and its coalition partners are trying to wage. The concluding section offers the most value as it refines and distills the work of several international security and military thinkers to arrive at some imperatives for successfully prosecuting this type of war to its end.  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