scholarly journals Study of the Extended Phase Shift Migration for Three-Dimensional MIMO-SAR Imaging in Terahertz Band

IEEE Access ◽  
2020 ◽  
Vol 8 ◽  
pp. 24773-24783 ◽  
Author(s):  
Hang Gao ◽  
Chao Li ◽  
Shiyou Wu ◽  
Hebin Geng ◽  
Shen Zheng ◽  
...  
Keyword(s):  
Phase Shift ◽  
Three Dimensional ◽  
Extended Phase ◽  
Terahertz Band ◽  
Sar Imaging

scholarly journals Sialolithiasis and Salivary Ductal Stenosis: Diagnostic Accuracy of MR Sialography with a Three-dimensional Extended-Phase Conjugate-Symmetry Rapid Spin-Echo Sequence

Radiology ◽  
2000 ◽  
Vol 217 (2) ◽  
pp. 347-358 ◽  
Author(s):  
Minerva Becker ◽  
Francis Marchal ◽  
Christoph D. Becker ◽  
Pavel Dulguerov ◽  
Georges Georgakopoulos ◽  
...  
Keyword(s):  
Diagnostic Accuracy ◽  
Spin Echo ◽  
Three Dimensional ◽  
Extended Phase ◽  
Phase Conjugate ◽  
Spin Echo Sequence ◽  
Conjugate Symmetry

A Tapered Fourcores Phase-Shift FBG Probe for Three-Dimensional Micro-Scale Measurement

2018 ◽  
Vol 30 (20) ◽  
pp. 1799-1802
Author(s):  
Kunpeng Feng ◽  
Jiwen Cui ◽  
Xun Sun ◽  
Hong Dang ◽  
Tangjun Shi ◽  
...  
Keyword(s):  
Phase Shift ◽  
Three Dimensional ◽  
Micro Scale

Migration of seismic data by phase shift plus interpolation

Geophysics ◽  
1984 ◽  
Vol 49 (2) ◽  
pp. 124-131 ◽  
Author(s):  
Jeno Gazdag ◽  
Piero Sguazzero
Keyword(s):  
Phase Shift ◽  
Wave Field ◽  
Seismic Data ◽  
Three Dimensional ◽  
Reference Wave ◽  
Second Step ◽  
Lateral Velocity ◽  
Wave Fields ◽  
Shift Method ◽  
Phase Shift Method

Under the horizontally layered velocity assumption, migration is defined by a set of independent ordinary differential equations in the wavenumber‐frequency domain. The wave components are extrapolated downward by rotating their phases. This paper shows that one can generalize the concepts of the phase‐shift method to media having lateral velocity variations. The wave extrapolation procedure consists of two steps. In the first step, the wave field is extrapolated by the phase‐shift method using ℓ laterally uniform velocity fields. The intermediate result is ℓ reference wave fields. In the second step, the actual wave field is computed by interpolation from the reference wave fields. The phase shift plus interpolation (PSPI) method is unconditionally stable and lends itself conveniently to migration of three‐dimensional data. The performance of the methods is demonstrated on synthetic examples. The PSPI migration results are then compared with those obtained from a finite‐difference method.

Three-dimensional static black hole with Λ and nonlinear electromagnetic fields and its thermodynamics

2019 ◽  
Vol 28 (12) ◽  
pp. 1950160
Author(s):  
M. B. Tataryn ◽  
M. M. Stetsko
Keyword(s):  
Black Holes ◽  
Black Hole ◽  
Electromagnetic Fields ◽  
Three Dimensional ◽  
Nonlinear Electrodynamics ◽  
Extended Phase Space ◽  
Field Equations ◽  
Extended Phase ◽  
Dimensional Spacetime ◽  
Static Black Hole

Static black hole with the Power Maxwell invariant (PMI), Born–Infeld (BI), logarithmic (LN), exponential (EN) electromagnetic fields in three-dimensional spacetime with cosmological constant was studied. It was shown that the LN and EN fields represent the Born–Infeld type of nonlinear electrodynamics. It the framework of General Relativity the exact solutions of the field equations were obtained, corresponding thermodynamic functions were calculated and the [Formula: see text] criticality of the black holes in the extended phase-space thermodynamics was investigated.

scholarly journals Three-Dimensional Ground-Based SAR Imaging Algorithm Based on Keystone Formatting and Subblock

IEEE Access ◽  
2020 ◽  
Vol 8 ◽  
pp. 90118-90131
Author(s):  
Weiming Tian ◽  
Wenyu Yang ◽  
Tongxin Dang ◽  
Zheng Zhao ◽  
Xiaoxin Han
Keyword(s):  
Three Dimensional ◽  
Imaging Algorithm ◽  
Sar Imaging

scholarly journals Phase Shift Migration With SIMO Superposition for MIMO-Sidelooking Imaging at Terahertz Band

IEEE Access ◽  
2020 ◽  
Vol 8 ◽  
pp. 208418-208426
Author(s):  
Guan Yang ◽  
Chao Li ◽  
Hang Gao ◽  
Guangyou Fang
Keyword(s):  
Phase Shift ◽  
Terahertz Band
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