A sound speed profile plays an important role in shallow water sound propagation.Concurrent with in-situ measurements,many inversion methods,such as matched-field inversion,have been put forward to invert the sound sp...A sound speed profile plays an important role in shallow water sound propagation.Concurrent with in-situ measurements,many inversion methods,such as matched-field inversion,have been put forward to invert the sound speed profile from acoustic signals.However,the time cost of matched-field inversion may be very high in replica field calculations.We studied the feasibility and robustness of an acoustic tomography scheme with matched-field processing in shallow water,and described the sound speed profile by empirical orthogonal functions.We analyzed the acoustic signals from a vertical line array in ASIAEX2001 in the East China Sea to invert sound speed profiles with estimated empirical orthogonal functions and a parallel genetic algorithm to speed up the inversion.The results show that the inverted sound speed profiles are in good agreement with conductivity-temperature-depth measurements.Moreover,a posteriori probability analysis is carried out to verify the inversion results.展开更多
1888年,爱尔兰诗人叶芝从偏僻的家乡出来,来到了当时世界上最现代、最繁华的国际大都市之一的伦敦。当他在伦敦的街头漫步,听着都市的喧嚣与机器的轰鸣,并从购物橱窗里看到一座人造喷泉,就开始想起真正的湖水,想起家乡的小岛Innisfree...1888年,爱尔兰诗人叶芝从偏僻的家乡出来,来到了当时世界上最现代、最繁华的国际大都市之一的伦敦。当他在伦敦的街头漫步,听着都市的喧嚣与机器的轰鸣,并从购物橱窗里看到一座人造喷泉,就开始想起真正的湖水,想起家乡的小岛Innisfree。两年以后,这一经验转化为叶芝的一首早期代表作《The Lake Isle of Innisfree》。展开更多
基金Supported by the Knowledge Innovation Program of the Chinese Academy of Sciences (No.KZCX1-YW-12-02)the National Natural Science Foundation of China (Nos.10974218,10734100)
文摘A sound speed profile plays an important role in shallow water sound propagation.Concurrent with in-situ measurements,many inversion methods,such as matched-field inversion,have been put forward to invert the sound speed profile from acoustic signals.However,the time cost of matched-field inversion may be very high in replica field calculations.We studied the feasibility and robustness of an acoustic tomography scheme with matched-field processing in shallow water,and described the sound speed profile by empirical orthogonal functions.We analyzed the acoustic signals from a vertical line array in ASIAEX2001 in the East China Sea to invert sound speed profiles with estimated empirical orthogonal functions and a parallel genetic algorithm to speed up the inversion.The results show that the inverted sound speed profiles are in good agreement with conductivity-temperature-depth measurements.Moreover,a posteriori probability analysis is carried out to verify the inversion results.
文摘1888年,爱尔兰诗人叶芝从偏僻的家乡出来,来到了当时世界上最现代、最繁华的国际大都市之一的伦敦。当他在伦敦的街头漫步,听着都市的喧嚣与机器的轰鸣,并从购物橱窗里看到一座人造喷泉,就开始想起真正的湖水,想起家乡的小岛Innisfree。两年以后,这一经验转化为叶芝的一首早期代表作《The Lake Isle of Innisfree》。
