苏轼密州词及豪放词风谈片

苏武在密州的词作是其豪放词的首创之作和第一个高峰,奠定了其豪放词派开创者的地位。其成功与密州的人文环境密切相关。     

Book reviews

Export or Die: Britain's Defence Trade with Iran and Iraq. by Davina Miller, London: Cassell, 1996, ISBN 0-304-33852-4 (hbk), £40.00, 04-33853-2 (pbk), £11.99.

The Storm Passed By: Ireland and the Battle of the Atlantic, 1940-1941. by Trevor Allen, Dublin: Irish Academic Press, 1996, ISBN 0-7165-2616-6, (hbk) £17.50.

Arms Control Toward the 21st Century. by Jeffrey A. Larsen and Greqory J. Rattray (eds). Boulder: Lynne Rienner, 1996.

Asia-Pacific Security, Less Uncertainty, New Opportunities. Edited by Gary Klintworth. Melbourne: Addison Wesley Longman, 1996, ISBN 0-582-80321-7, £24.99.

Masters of War, Military Dissent and Politics in the Vietnam Era. by Robert Buzzanco, Cambridge: Cambridge University Press, 1996, ISBN 0-521-48046-9 (hbk), £29.95

Controlling the Arms Trade: the West Versus the Rest. By Paul Cornish, London: Bowerdean Publishing Co., 1996, ISBN 0-906097-44-4 (pbk), £9.99.

Secret Agencies: US Intelligence in a Hostile World. by Loch K. Johnson, London: Yale University Press, 1997, ISBN 0-300-06611-2 (hbk), £22.50.     

柱锥级联型爆磁压缩发生器的实验研究

研究了柱锥级联型爆磁压缩发生器。给出了主要实验结果。发生器的负载是3.5μH,最大电流是55.8KA,上升前沿是14.3μs,电压为30.5KV。平均电流放大倍数是6.4。     

红外脉冲强光辐射产生技术研究

定向红外脉冲强光辐射技术是定向红外对抗中的关键技术,主要用来破坏敌方精确制导武器或C4I系统的红外传感器。本文进行了三种产生技术的研究,即爆炸激励惰性气体,多丝电爆激励惰性气体和多点同步爆燃药物。在同步爆燃产生技术的研究中,当有效载荷弹药为0.2kg时,在距离源50m处得到三个波段(1～3、3～5、8～12μm)的辐射强度为(2.00～3.55)×l05W／Sr,脉冲半高宽为约20ms的强红外辐射脉冲。     

基于分形几何的信号特征提取技术及其应用研究

针对分形客观展现事物原貌的特点 ,从工程应用的角度分别对信号的分形性验证、有效分析区间的确定、分形性描述和刻画、设备状态的趋势分析等方面作了探讨 ,形成了基于分形几何的信号特征提取技术 ,并描绘出基于分形几何的设备故障诊断模式     

一种新的对潜应召搜索法及其效能分析

论述了一种新的对潜应召搜索法 ,并对其效能进行了分析 ,同时就平均发现概率、搜索时间、转向次数三个指标与海军现在使用的扩展方阵搜索法进行了仿真比较     

一类不匹配不确定非线性系统鲁棒变结构控制

针对一类具有不匹配非参数化不确定性的非线性系统 ,设计出一种鲁棒变结构控制器。该控制器能够保证当时间 t趋于无穷时 ,闭环控制系统的输出跟踪误差趋于零。仿真实例说明了该控制器具有满意的控制效果     

Youth Between State and Rebel (Dis)Orders: Contesting Legitimacy from Below in Sub-Sahara Africa

Abstract

The Sahel has gained attention in international politics as one of the central theatres in the war on terrorism. International actors in this war seek alliances with states in the region, reinforcing the latter’s military strength and their legitimacy from outside. At the same time, increasingly-connected young populations question the legitimacy of their states, and contest that legitimacy from within and below. In the absence of states delivering any reasonable form of social contract, young people become torn between different governing orders and find themselves in a liminal space. In this article we present the cases of youth in Mali and Chad, who find themselves in a period of re-definition of their position in society and hence search for legitimate structures representation. In this search they may frame their belonging in terms of ethnicity, religion or political opposition – and increasingly also in adherence to global citizenship. New information flows and connectivity among young people in these regions, and between them and the diaspora, has given a new turn to their search for citizenship/belonging and rightful representation. However, whether their search will be successful in this geopolitical context is questionable.     

进入角约束下的载机变结构远距引导

针对一般导引律在载机远距引导中存在的问题,结合远距引导的需求,设计了远距引导的三维变结构导引律。该导引律具有较强自适应性,可以使载机以期望的进入角接近目标。仿真结果表明,载机在该导引律作用下,能以较小过载,平滑轨迹快速接近机动目标,并保证载机引导结束时占有有利的空中战术态势。     

直升机反水雷扩方搜扫建模与航路优化

针对水雷障碍清除中如何迅速查明雷线位置的问题,提出了反水雷直升机扩方搜扫的方法,给出了两种扩方搜扫样式;结合反水雷直升机的飞行特性,通过对水雷雷线布设样式的分析,建立了直升机反水雷扩方搜扫航路模型和两种扩方搜扫作战样式下搜扫航路边界确定模型,并对直升机扩方搜扫概率和航路优化建模分析;最后,通过实例和结果分析证明了模型的正确性,为反水雷直升机航路优化和方案制订提供了决策依据。