数值模拟气/气喷嘴速度比对燃烧性能的影响

为研究应用于全流量补燃循环发动机的不同气/气喷嘴得到的燃烧流场,通过求解NavierStokes方程组,对不同燃料与氧化剂速度比下的流动燃烧过程进行了数值计算,计算结果与实验结果吻合。仿真结果表明:增加速度比能使燃烧火焰面提前,燃烧效率变大。如果发动机的长度受到限制,可以适当增加速度比以实现高效燃烧。     

Detecting Problems in Military Expenditure Data Using Digital Analysis

The UN asks governments to report key figures of their annual military budgets with the aim of creating trust among member states. This goal can only be achieved if the data reported is accurate. However, although there are many reasons for governments to falsify data, the UN does not check for manipulation. In this paper, we apply Benford’s law to the military expenditure data of 27 states taken from the UN register. Our analysis of the first digits shows that the states with the greatest deviations from the expected Benford distribution and therefore the lowest data quality are the USA and the UK.     

A note on the financial condition of defense contractors

In recent years, there have been several changes in the weapon‐system acquisition market which have the potential to negatively impact the financial condition of defense contractors. This study evaluates the financial health of defense firms vis‐a‐vis nondefense firms using a fiscal distress identification model developed by E.I. Altman. We conclude that the financial condition of defense firms has deteriorated but the deterioration is the same as experienced by nondefense firms.     

Delusion of Defeat: The United States and Iraq, 1990–1998

This article challenges the widely held belief that that the United States ‘won the war but lost the peace’ following the war with Iraq in 1991. Fears of a resurgent Iraq grew throughout the decade, despite abundant evidence that Iraq was becoming desperately weak and was no longer a threat to regional security. In fact, the United States won the war as well as the peace by any meaningful definition of the term. The article also discusses the reasons why US policymakers and observers convinced themselves that they had lost. The final section considers implications for strategy and policy in wars of limited objectives.     

试论武警“合训”院校现代化教学模式的构建

武警部队院校体制调整后,作为担负学历教育的“合训”院校,只有大力加强教学理论研究,及时实现教员角色转变,积极营造健康向上的教学环境,才能顺利实现“培养具有较高文化素养、具备扎实军事基础的新型军事人才”的教学目标。     

中小学校长治校漫话——由“钱学森之问”引发的思考

“钱学森之问”是广大校长必须直面的一个严峻课题。校长作为一所学校教学业务的指导者和教育行政的管理者,应以教学、管理、学生、教师及社会为基本职业维度,在工作中以“五心”标准要求自己。导致校长履职失范的因素包括校长自我认知错位、上级行政主管单位制度缺位及学校教职工角色异位等方面。人格自觉与制度跟进是加强校长队伍建设、规范校长治校理教的根本和正途。     

阶比谱分析与汽车起动电机故障的实时诊断

本文主要论述阶比谱分析方法及其在汽车起动电机故障实时诊断中的应用。首先阐述了阶比谱分析的原理以及阶比采样中混迭与泄漏的产生及其抑制方法,然后讨论了如何在起动电机运行过程短、升速快的情况下获取感兴趣的噪声信号,进而采用阶比谱分析方法从信号中提取故障特征信息,最后利用阀值判别法起动电机的故障进行实时诊断。     

熵、信息与战略欺骗

熵最初用于描述宏观物理系统的热力学状态,之后被广泛应用于控制论、概率论、数论、天体物理、生命科学等领域,但是在军事领域的应用研究还很少。以熵、信息等基本概念为基础探讨军事领域中在战略欺骗方面的应用,通过对战略欺骗的热力学分析,提出了负信息馈送原理,并给出了两种实施战略欺骗的操作技术。     

新疆高校维吾尔族学生英语学习中母语负迁移现象的研究

本文从迁移理论出发,以调查维吾尔族母语负迁移为目的,结合访谈、调查问卷和写作,对分布在新疆不同高校里的维吾尔族学生进行了调查研究,最后得出结论：维吾尔族学生在英语学习中受母语负迁移的影响较大,其中与维吾尔语差异最大的语法方面所受母语影响最大,母语思维是产生负迁移的主要原因,其它方面受汉语影响也比较大。基于上述研究,为了避免负迁移的发生,本文提出了相应的建议。     

中国共产党的领导地位是历史和人民的必然选择

中国共产党成立90年来,带领中国人民赢得了民族独立和人民解放,初步实现了国家的繁荣昌盛和人民的共同富裕。回顾历史,审视现实,放眼全球,展望未来,只有坚持党的领导,中华民族才能不断走向新的胜利。