The study on spectral and spatial distribution characteristics of infrared radiation of plume is useful for the demand of detection or defense mechanism of aircraft.
对飞机尾焰红外辐射的光谱特性及空间分布特性进行研究，将满足对飞行器探测或防护的需求。
Using a simplified model of light interference, we discussed the physical essence of the spatial coherence demand on a photon correlation spectrum measurement system in dynamic light scattering.
利用光干涉的简化模型讨论了动态光散射中光子相关谱测量系统的空间相干性要求的物理本质。
With the expanding of GIS application, multi-user concurrent operation becomes the basic demand for spatial data engine.
随着GIS应用的扩大，多用户并发操作成为空间数据引擎的基本要求。
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