研究了简并二能级系统的受激光子回波效应。
The stimulated photon echo in degenerate two-level system has been studied.
详细讨论了不同入射角和不同分维及遮蔽效应对分形海面散射回波多普勒谱的影响。
The influence of different incident Angle, different fractal dimension and shadowing effect on the Doppler spectra of the echo from the fractal sea surface is discussed in detail.
本文通过所建立的采样比率模型对多目标的距离闪烁效应进行了理论分析，并从回波频谱畸变的角度解释了其物理本质。
In this paper, the range glint is analyzed in theory through the model of sample ratio established, and then its physical essence is also expatiated using echo spectrum aberration.
对近程地面目标监测雷达的回波进行分析，建立相应的目标信号模型、多路径效应回波模型和杂波模型。
The echo of short range radar detecting ground targets are analyzed in this paper, Models for targets, multipath effects and clutter are constructed.
论文针对L波段ISAR，通过四个数学模型仿真了电离层引起的目标回波相位起伏、折射效应以及回波幅度闪烁对ISAR图像的影响。
This paper gives four models to simulate effects of phase fluctuation, refraction and amplitude scintillation due to ionosphere on L-band ISAR.
同时对双向HFC网存在的主要问题：上行通道噪声漏斗效应、各种噪声干扰控制策略、回波反射等进行了说明。
Finally, points out the main problems exists in the HFC network: noise funneling in the re-turn path; control tactics of noise; reflection in the cable.
超声波碰到杂质或分界面会产生显著反射形成反射成回波，碰到活动物体能产生多普勒效应。
Ultrasonic encounter impurities or boundary surface will produce significant reflection form reflex into echo, encounter moving objects can produce doppler effect.
超声波碰到杂质或分界面会产生显著反射形成反射成回波，碰到活动物体能产生多普勒效应。
Ultrasonic encounter impurities or boundary surface will produce significant reflection form reflex into echo, encounter moving objects can produce doppler effect.
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