一种小波变换域中最优门限的取法

在信号小波变换编码中,一般对高频小波系数ｘ先作阈值处理,即对给定的门限Ｔ＞０;若｜ｘ｜≤Ｔ,则令ｘ＝０。在本文中,从理论上给出了一种最优门限Ｔｏｐｔ,Ｔｏｐｔ使得重构误差信号的平均能量达到最小。     

坐标变换对双/多基地雷达测量误差的影响

本文讨论了坐标变换对测量误差的影响,并且定量分析了坐标变换前后的测量误差变化情况,得出了相应的结论。     

求吊声一次搜潜概率的新方法

本文用不同于既往的研究方法,从对目标运动要素散布的分析入手,较合理地假设了目标的运动,进而用数学分析方法推得吊放声纳一次搜潜概率的解析模型。这一模型的突出特点是计算简便、实用性强,各参数的含义一目了然。     

在役立式钢制油罐底圈罐壁可靠性分析

在役油罐的安全评估通常采用经验评估法,具有较大的盲目性。立式钢油罐强度破坏的重点区域在底圈罐壁,其作用的各变量因素具有较大的随机性,可靠性评价方法较为适用。根据结构可靠性理论推导出底圈罐壁强度失效的计算模型,并进行实例计算分析,为在役油罐的安全评估提供了一种量化的评价方法,具有一定的指导意义和参考价值。     

雷声公司专利地图分析

运用专利地图方法对雷声公司的全球专利分布、专利申请人、专利发明人、技术热点情况进行了分析,并结合情报资料,探讨了雷声公司的并购业务、人员培养战略对技术发展的推动作用．最后对该公司未来发展所具备的优势与机遇,以及将面临的劣势与风险进行了描述。     

Defense Spending Promotes Aggregate Output in the United States--Evidence from Cointegration Analysis

This paper provides new evidence on the question of the effects of defense spending on aggregate output in the United States. Earlier studies of this basic issue relied on traditional econometric techniques and the neoclassical production function theory. In this paper, recently developed cointegration methodology and modeling that is inspired by new macroeconomic theory is employed. The results from earlier studies concerning the effects of defense spending are mixed. The findings presented in this paper reveal that there is a quantitatively important and positive relation between defense spending and aggregate output in the United States.     

The Long-run Causal Relationship Between Military Expenditure and Economic Growth in China: Revisited

This paper re-examines the long-run causal relationship between military expenditure and economic growth in China over the period 1952–2010. An empirical econometric analysis based on a Barro-style growth model is conducted. By employing the Bartlett corrected trace test, which provides better approximations of the finite sample distribution to determine the rank of cointegration, the results support the existence of a single long-run equilibrium relationship between the variables. Furthermore, it is confirmed that the cumulated shocks of military expenditure primarily originate from different components of shocks that relate to economic development rather than the other way round.     

DOES DEFENCE SPENDING STIMULATE ECONOMIC GROWTH IN INDIA? A REVISIT

This study reinvestigates the effect of defence spending on economic growth using Zivot and Andrews and Lee and Strazicich, structural unit root tests and the autoregressive distributed lag bounds testing approach to cointegration in augmented version of Keynesian model for India. Study confirmed long run relationship among variables studied show that economic growth is positively affected by defence spending (also negative impact after a threshold point), investment and trade openness while negatively by interest rate. Granger causality analysis revealed bidirectional causal relationship between defence spending and economic growth as probed by variance decomposition approach.     

武警院校指挥类“合训”学员军事素质科学评价研究

针对武警部队第一批指挥类“合训”学员,选取部分“合训”学员的军事体能考核成绩,利用多元统计中的主成分分析方法,构造科学、客观的评价函数,对学员军事体能考核指标体系进行综合评价,并对每一名学员考核成绩排序,为武警部队“合训”学员教学、管理提供参考。     

基于排队论的协同防空的作战效能分析

舰艇编队协同防空作战成为未来海战的重要形式,运用排队论对舰艇编队协同防空的作战效能进行了研究。以排队理论为基础建立了舰艇编队协同防空的排队模型,运用理论分析得到了以整个编队毁伤目标概率为指标的防空效能。通过对防空效能的计算与仿真,分析了几个重要参数对防空效能的影响,为多层舰艇防空系统的设计与运用提供了理论支持。