Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Phaseless Imaging by Reverse Time Migration: Acoustic Waves   We propose a reliable direct imaging method based on the reverse time
migration for finding extended obstacles with phaseless total field data. We
prove that the imaging resolution of the method is essentially the same as the
imaging results using the scattering data with full phase information. The
imaginary part of the cross-correlation imaging functional always peaks on the
boundary of the obstacle. Numerical experiments are included to illustrate the
powerful imaging quality.

25
The categories of this paper are: patt-sol
15
The categories of this paper are: nucl-ex
20
The categories of this paper are: acc-phys
3
The categories of this paper are: physics
5
The categories of this paper are: gr-qc
17
The categories of this paper are: q-fin
4
The categories of this paper are: cond-mat
35
The categories of this paper are: mtrl-th
0
The categories of this paper are: hep-ph
34
The categories of this paper are: chem-ph
14
The categories of this paper are: math-ph
7
The categories of this paper are: hep-th
22
The categories of this paper are: chao-dyn
10
The categories of this paper are: q-bio
26
The categories of this paper are: bayes-an
1
The categories of this paper are: cs