多通道控制／检测操纵台

本操纵台可以对６４个通道或号位的综合参数，如温度、压力、温度、物位、流量等刊物民检测，它具有两种功能；（１）对６４个地点的进行自动巡回控制／检测；（２）可随意对任意地的参数进行优化控制／检测。     

Parametric analyses for synthetic jet control on separation and stall over rotor airfoil

Numerical simulations are performed to investigate the effects of synthetic jet control on separation and stall over rotor airfoils. The preconditioned and unsteady Reynolds-averaged Navier–Stokes equations coupled with a k x shear stream transport turbulence model are employed to accomplish the flowfield simulation of rotor airfoils under jet control. Additionally,a velocity boundary condition modeled by a sinusoidal function is developed to fulfill the perturbation effect of periodic jets. The validity of the present CFD procedure is evaluated by the simulated results of an isolated synthetic jet and the jet control case for airfoil NACA0015. Then, parametric analyses are conducted specifically for an OA213 rotor airfoil to investigate the effects of jet parameters(forcing frequency, jet location and momentum coefficient, jet direction, and distribution of jet arrays) on the control effect of the aerodynamic characteristics of a rotor airfoil. Preliminary results indicate that the efficiency of jet control can be improved with specific frequencies(the best lift-drag ratio at F+= 2.0) and jet angles(40 or 75) when the jets are located near the separation point of the rotor airfoil. Furthermore, as a result of a suitable combination of jet arrays, the lift coefficient of the airfoil can be improved by nearly 100%, and the corresponding drag coefficient decreased by26.5% in comparison with the single point control case.     

波形合成的方向处理

波形合成中方向问题的核心是相位计算。本文作了分析     

快速捕获频率合成器

跳频通信具有抗干拢能力强、保密性好等特性,已广泛应用于军事通信、雷达及电子战中。实现频率合成的关键是提高频率转换速率。本文提出一种采用鉴频鉴相器(FPD)原理和高增益二阶环的自适应滤波器来实现频率的快速捕捉,该辅助捕捉方法缩短了频率转换时间。     

国际要闻（2009年10月1日-31日）

10月12日，卡塔尔航空公司一架A340—600型客机从英国伦敦飞抵卡塔尔多哈．客机以传统航空燃油和天然气合成燃料按1：1比例为动力，全球首架以天然气和成燃料驱动的客机完成首飞。     

粉料粒度对Al／TiC热爆反应合成规律的影响

用热爆反应合成法研究了Ａｌ／ＴｉＣ复合体系中粉料粒度对ＴｉＣ热爆反应合成规律的影响．结果表明：粉料粒度对反应的起始温度Ｔｉｇ没有影响，但对反应温度和反应时间有一定的影响。另外，通过ＳＥＭ观察了反应合成ＴｉＣ的组织和形貌及粉料粒度对它的影响。试验表明：粉料的粒度对反应合成ＴｉＣ的大小、形貌没有影响。合成的ＴｉＣ具有亚微米尺寸（约为０．３μｍ），且表面光滑干净，大部分呈圆整的球状。     

NiAl合金的热爆合成及其反应机制

本文研究了NiAl合金的热爆合成,其反应过程为液相控制,产物为β-NiAl,密度较高。本文给出了不同条件下合成的起爆时间及主要影响因素。