The water sound speed and temperature can be calculated by measuring Brillouin scatteringfrequency shift.
借助测量水体布里渊散射的频移，可得到水体声速或温度。
2
In this paper, the step frequency response equation of optical-region radar target is firstly established by using theories of multiple scattering centers and local resonance.
本文首先根据多散射中心理论与局部谐振原理，建立了雷达目标在光学区阶梯频率波形激励下的响应方程。
3
Based on the multi scattering center theory, the frequency model describing electromagnetic scattering characteristics of target is developed.