随机振动中晶体振荡器的有源降噪设计

针对晶体振荡器在振动下会发生输出频率漂移的问题,在分析声学有源降噪技术和加速度对晶体振荡器输出相位噪声的影响机理基础上,提出降低随机振动中晶体振荡器噪声的方法。在晶体振荡器外围电路中嵌入加速度传感器、模数转换器、数模转换器和数字处理器,构建对晶体振荡器相位噪声进行实时补偿的有源降噪系统。结果表明:设计的有源降噪系统在0.03g/Hz振动幅度、10~850 Hz频率范围的随机振动条件下,能达到20 d B的相位噪声补偿效果。     

Command Coordination and Tactical Effectiveness in Counter-insurgency Operations: Lessons from the South Korean Campaign

This article analyzes the causes of combat effectiveness of the South Korean security forces through the course of its various counter-insurgency (COIN) operations from 1948 to 1953. We argue that improvements in two interrelated aspects ultimately resulted in higher operational and tactical level performance: unified operational command structure and the subsequent improvements in tactical efficiency under the guidance of the US advisory mission. Through an in-depth case study on how a nascent army improved its capacity in combating homegrown insurgencies, we demonstrate how the actual conduct of operations itself remains just as significant in the assessment of overall COIN outcomes.     

Shots per casualty: an indicator of combat efficiency for the first Australian task force in South Vietnam

ABSTRACT

In combat, the ratio of shots fired per casualty inflicted can provide a measure of the combat effectiveness of a force. The shots per casualty ratio achieved by the 1st Australian Task Force in Vietnam is shown to change according to factors including marksmanship, tactics and combat type. While, over the course of the campaign, 1ATF fired an increasing number of shots to achieve a casualty, this is explained by improvements in the quality of Viet Cong and People’s Army small arms. Australian Task Force and US Army shots per casualty ratios are briefly compared..     

从《人民武装警察法》看武警部队执行任务的职权

《中华人民共和国人民武装警察法》（以下简称《人民武装警察法》）经十一届全国人大常委会第十次会议通过。《人民武装警察法》的颁布标志着武警部队正规化建设迈上了一个新的历史台阶。武警部队的任务与职能,在法律上有了明确的依据。为更好地促进武警部队依法完成各项任务,探讨武警部队执行任务的职权是十分必要的。     

对武警院校实施“特色办学”的前瞻与思考——以武警工程学院为例

在建设现代化武警的系统工程中,武警院校建设处于优先的地位。为了发挥好院校在建设现代化武警中的重要作用,必须确立“特色办学”理念,努力开创“特色办学”的新路子。本文论述了特色办学的重要意义,以武警工程学院为例,分析了武警院校特色办学的现状,对进一步实施特色办学、以特色拉动院校创新发展进行了前瞻与思考。     

浅析武警部队心理管理的基本途径

部队心理管理针对被管理者的心理活动规律,从激发被管理者的心理潜力入手,充分调动他们的主观能动性,实现部队的和谐管理。本文从心理管理的管理起点、建设重点、主要突破口、实现目标四个方面加以分析和阐述,试图对武警部队心理管理的本质和具体做法作以有益探索。     

单通道自适应有源消声系统

对单通道自适应有源消声系统进行了频域分析,对系统的有关特性进行了讨论,并分别在半消声室和普通房间进行了降噪实验。在误差传声器周围取得了一定的有效空间范围。     

Airpower in India's 1999 Kargil War

For 74 days in mid-1999, India waged an intense war against intruding Pakistani forces on the Indian side of the Line of Control dividing Kashmir in the Himalayas. The Indian Air Force (IAF) was a key contributor to India's eventual victory in that war. Among other things, the IAF's combat performance showed how the skillful application of air-delivered firepower, especially if unmatched by the other side, can shorten and facilitate the outcome of an engagement that might otherwise have persisted indefinitely. It also showed that a favorable position in the conventional balance remains strategically useful even in conditions of mutual nuclear deterrence.     

Cyber War Will Take Place!

The question of whether or not cyber war amounts to war per se is difficult to determine given strategic theory's uncertain grasp of the concepts of force, violence and lethality. These three concepts, along with their relationships with one another, are explored in order to demonstrate that cyber attacks can in fact be construed as acts of war.     

Insurgency by the numbers I: A reconsideration of the ecology of communist success in jiangxi province,China

Theorizing about Taliban operations in Afghanistan has its limits and it is possible that Kabul-centric strategies do not adequately address the unique circumstances of each region in the country. How exactly has the Taliban gone about attaining its objectives in Kandahar province and how have those approaches evolved since 2002? And how have the Taliban adapted to coalition forces' attempts to compete with the insurgency and stamp it out? The answers to these questions are critical in the formulation of any counterinsurgency approach to Afghanistan.