共鸣发声测微方法的研究

本文论述了共鸣发声测微法的基本原理,提出了一套用于测量发声频率与位移之间关系的实验方法。研究表明本方法具有测量范围大,抗干扰力强,测量精度高的特点。     

应用Bayes分析方法鉴定误码率

本文应用了Bayes分析方法,即依据样本考虑先验知识,进行统计推断“可信度”。由此推导出了误码率计算公式,从而在数据传输试验中实现了不需要测试设备,只需计算重发次数,传输总次数,即可求得误码率,同时给出其风险,为科学鉴定误码率提供了理论依据。     

磁层顶边界区剪切流的非线性波动方程

本文运用二维约化摄动方法首次导出磁层顶边界区剪切流的非线性波动方程,并对其非线性性态作了一些定性讨论。     

毫微秒正脉冲高电压击穿的水介质开关特性实验研究

本项研究是亚微秒负脉冲高电压击穿的水介质开关特性的实验研究工作的继续。研究结果表明,当毫微秒脉冲击穿时,要考虑电极间水电容的波阻抗对触发器脉冲能量的泄漏。     

一种改进的最大选择逻辑恒虚警检测算法

在已有的恒虚警处理算法中,由于单元平均（ＣＡ）和有序统计（ＯＳ）法都是剔除平均（ＴＭ）法的特例,因此可以考虑用ＴＭ法代替一些参量ＣＦＡＲ算法中所采用的ＣＡ或ＯＳ法,以期获得更优的检测或控制虚警的性能。基于这种思想提出ＴＭＣＡＧＯ检测器,并在ＳｗｅｒｌｉｎｇⅡ型目标假设下推导Ｐｆａ、Ｐｄ和ＡＤＴ的解析表示式。通过对其在均匀背景和强干扰目标环境下性能的分析,以及与ＯＳＣＡＧＯ、ＧＯＳＧＯ和ＯＳ等检测器性能的比较,发现ＴＭＣＡＧＯ在上述环境中的性能较这几种检测器均获得了明显的改善。     

新型角速率火控系统研究

根据激光测距仪获得的目标斜距,建立实时确定目标速度和过航斜距的数学模型,并提出解决角速率火控系统中普遍存在的计算延迟、预测精度不高和弹道气象修正困难等问题的方案。     

系统的模糊可靠度、模糊故障率和模糊平均寿命之间的关系

讨论了系统的模糊可靠度、模糊故障率和模糊平均寿命之间的关系及串联、并联系统的模糊可靠度、模糊平均寿命与元件的模糊故障率、模糊平均寿命的关系。     

舰用锅炉胀接结构可靠性与后退式胀管器的应用

针对舰用锅炉换热管与管板胀接结构可靠性,分析了影响胀接的主要因素,运用弹性理论对胀接结构进行了理论分析,并首次对舰用锅炉应用双轴承后退式胀管器进行管子与管板试件的胀接试验研究,推导出适合机械式胀接的胀管率近似理论计算方法.     

The nexus between military expenditures and economic growth in the BRICS and the US: an empirical note

This empirical note re-examines the causal linkages between military expenditures and economic growth for the BRICS countries (Brazil, Russia, India, China, and South Africa) and that for the USA during the period 1988–2012. Results of Granger causality tests show that military expenditures influence economic growth in the USA, economic growth influences military expenditures in both Brazil and India, a feedback between military expenditures and economic growth in Russia, and no causal relation exists between military expenditures and economic growth in China and South Africa. The findings of this study can provide important policy implications for the BRICS countries and also for the USA.     

The impact of political instability on the economic growth of ECOWAS member countries

This study contributes to the literature on political instability and economic growth by specifically investigating the impact of political instability on the economic growth of member countries of the Economic Community of West African States (ECOWAS). West Africa is regarded as the riskiest sub-region within the African continent. To achieve this objective, this study employed panel data techniques (fixed effects and generalised method of moments) on a sample of 15 ECOWAS member countries for the period 2005–2012. The findings from the analyses showed that terrorism, poor governance, social unrest, youth unemployment, death rate and natural resource rent have negative relationships with economic growth. The findings and policy implications deduced from this study could not have been any timelier considering the recent escalation of instability in West African countries and their fragile growth prospects.