نتایج جستجو برای: Gaussian Beam migration
تعداد نتایج: 326782 فیلتر نتایج به سال:
We investigate the Gaussian beam migration of commonshot and common-receiver data. The imaging of commonshot data is useful for seismic data where the receiver coordinates are well sampled, but the source coordinates are less well sampled. By reciprocity, this approach can also be applied to common-receiver data, such as from OBS experiments where the source locations are dense but the receiver...
The vertical seismic profiling (VSP) Gaussian beam migration is a imaging method with both computational efficiency and precision. It can get high-resolution structural features near the well. However, VSP based on primary reflection limited by observation system, which makes it unable to image for shallow structure at far offset. free-surface multiples in expand illumination range offset effec...
In this paper, propagation of flattend Gaussian beam in optical media is simulated by split step fourier method, ABCD matrix method, and paraxial group method, and results are compared. For this purpose, at first, flattend Gaussian beam, strongly nonlocal nonlinear media and investigation methods of propagation of optical beams are introduced. Then, propagation of flattend Gaussian beam in free...
We design an Eulerian Gaussian beam summation method for solving Helmholtz equations in the high-frequency regime. The traditional Gaussian beam summation method is based on Lagrangian ray tracing and local ray-centered coordinates. We propose a new Eulerian formulation of Gaussian beam theory which adopts global Cartesian coordinates, level sets, and Liouville equations, yielding uniformly dis...
studying gaussian beam is a method to investigate laser beam propagation and abcd matrix is a fast and simple method to simulate gaussian beam propagation in different mediums. of the abcd matrices studied so far, reflection and refraction matrices at various surfaces have attracted a lot of researches. however in previous work the incident beam and the principle axis of surface are in parallel...
Studying Gaussian beam is a method to investigate laser beam propagation and ABCD matrix is a fast and simple method to simulate Gaussian beam propagation in different mediums. Of the ABCD matrices studied so far, reflection and refraction matrices at various surfaces have attracted a lot of researches. However in previous work the incident beam and the principle axis of surface are in parallel...
We perform a theoretical investigation on the Goos-Häenchen shift (the lateral shift) in one-dimensional photonic crystals (1DPCs) containing left-handed (LH) metamaterials. The effect was studied by use of a Gaussian beam. We show that the giant lateral displacement is due to the localization of the electromagnetic wave which can be both positive and negative depending on the incidence angle o...
The estimation of the subsurface acoustic impedance (AI) model is an important step seismic data processing for oil and gas exploration. full waveform inversion (FWI) a powerful way to invert parameters with surface acquired data. Nevertheless, strong nonlinear relationship between will cause nonconvergence unstable problems in practice. To divide into some more linear steps, 2D AI imaging meth...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید