Near-field imaging of small perturbed obstacles for elastic waves

نویسندگان
چکیده

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Reconstruction of Elastic Obstacles from the Far-field Data of Scattered Acoustic Waves

We consider the inverse problem for an elastic body emerged in a fluid due to an acoustic wave. The shape of this obstacle is to be reconstructed from the far-field pattern of the scattered wave. For the numerical solution in the two-dimensional case, we compare a simple Newton type iteration method with the Kirsch–Kress algorithm. Our computational tests reveal that the Kirsch–Kress method con...

متن کامل

Focusing of elastic waves for microseismic imaging

Microseismic events generate compressive waves and shear waves which can be recorded at receivers. We present a theory that shows how elastic P and S waves separately backpropagate to the original source location. These refocused P and S wavefields are free of singularities. We also demonstrate a technique that enhances the ability to image the spatial focus for each wave type using elastic wav...

متن کامل

Near Field Beamforming Array for Detecting Elastic Waves in the Earth

A near eld beamforming array is investigated for use in a radar system that is part of a hybrid elastic electromagnetic technique for detecting land mines The radar is used to measure the displacement of the surface of the earth and land mines due to elastic waves in the earth The beamforming array is used to obtain a su ciently small spatial resolution for the measurement of the displacement w...

متن کامل

Imaging Polarimeter Arrays for Near-Millimeter Waves

Pauf F. Goldsmith received A.B. and Ph.D. degreesfrom the University of California, Berkeley, in 1969 and 1975,respectively. After two years as a Member of the Technicaf Staff at Bell Laboratones, he joined the faculty of the University of Massachusetts,Amherst. He is presently Associate Professor of Physics and Astronomy and acting director of the Five College Radio Astronomy Observatory. He i...

متن کامل

Robustness of the scalar elastic imaging condition for converted waves

For elastic reverse-time migration, one constructs elastic source and receiver wavefields using a source function and multi-component data, and then applies an imaging condition to the reconstructed wavefields. A widely used imaging condition is crosscorrelation of individual wave modes separated in both wavefields, e.g., compressional (P) waves and shear (S) waves. One difficulty in elastic mi...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: Inverse Problems

سال: 2015

ISSN: 0266-5611,1361-6420

DOI: 10.1088/0266-5611/31/8/085010