浅海环境参数宽带匹配场反演研究

宽带匹配场反演是获取海洋环境参数信息的有效方法 ,选择合适的反演目标函数对环境参数的估计结果十分重要。文章研究了浅海环境参数宽带匹配场反演的各种目标函数建立方法 ,同时结合亚洲海实验 (ASIAEX2 0 0 1)数据采用遗传全局寻优算法对该海域环境参数进行了反演 ,并对反演结果尤其是沉积层参数的合理性进行了分析。

Broadband matched-field inversion for shallow water environment parameters

The goal of the matched field inversion (MFP) is to find the physical parameters of the environment.To overcome the inaccuracy and instability of single frequency inversion,many researchers used broadband MFP inversion to estimate the parameters.The inversion process can be separated five parts:(1) discretization of the environment;(2) efficient and accurate forward modeling;(3) reasonable objective function;(4) efficient optimization procedures;(5) uncertainty analysis.A complete inversion requires equal attention to all five items. In this paper,broadband multi frequencies matched field inversion method was used to determine the environment parameters in shallow water.According to different conditions,several broadband objective functions were presented.Using ASIAEX2001 (Asian Seas International Acoustics Experiment)experimental data from explosive sources in the ECS (East China Sea) and genetic algorithms,we got the environment parameters especially in sediment and analyzed the inversion results.