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通过数值模拟计算发现,对于分层有吸收海底,在层厚已知的条件下,除最下面的介质以外.有可能利用垂直入射的脉冲声波遥测各层的密度、声速与吸收系数。此法的要点是,根据入射波和层参数的假设值算得反射信号,与实际反射信号比较;然后改变参数再作计算,直到误差最小为止.此时对应的层参数即为介质参数值实际的估计值。指出根据这种方法有可能实现以自适应方法遥测分层海底的介质参数。
Through numerical simulation, we found that there is absorption seafloor for stratification, except for the lowest medium under the condition that the thickness of strata is known. It is possible to remotely sense the density, the sound velocity and the absorption coefficient of each layer by using a vertically incident pulse sound wave. The point of this method is that the reflected signal is calculated from the assumed values of incident wave and layer parameters and compared with the actual reflected signal; then the parameters are changed and then calculated until the error is minimum. In this case, the corresponding layer parameter is the actual estimated value of the medium parameter. It is pointed out that according to this method, it is possible to realize the media parameters of stratified seafloor by adaptive method.