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The AAPG/Datapages Combined Publications Database
Showing 5,187 Results. Searched 200,293 documents.
Migration Amplitude Recovery using Curvelets
Peyman P. Moghaddam
Search and Discovery.com
... the action of Fourier integral operators. They stated that under some condition a curvelet maps to another curvelet under the action of Fourier Integral...
Unknown
Migration Amplitude Recovery using Curvelets
Peyman P. Moghaddam
Search and Discovery.com
... the action of Fourier integral operators. They stated that under some condition a curvelet maps to another curvelet under the action of Fourier Integral...
Unknown
Finite Difference Modeling: Part II: How to clean numeric time dispersion
Lasse Amundsen, Ørjan Pedersen, Martin Landrø
GEO ExPro Magazine
... wavefield at frequency . Finally, an inverse Fourier transform gives the temporally dispersionfree wavefield in time. Digital Filtering Mittet (2018...
2018
ABSTRACT: Study on FTIR of high-organic-sulfur coal and the structure of sulfur-containing compounds of its extracts
Cong Chen, Yuegang Tang, Xiaolong Li, Yewei Sun
The Society for Organic Petrology (TSOP)
... and their extracts were studied using Fourier Transform Infrared Spectroscopy (FTIR) and Gas Chromatography-mass Spectrometer (GC-MS) to explore the evolution...
2018
Abstract: Multiple and Noise Attenuation with Tau-P Seismic Data Processing
Leong Lap Sau, Ng Tong San
Geological Society of Malaysia (GSM)
... transfrom from the 2-D Fourier transform. Compared to conventional processing in the (x, t) plane, the T-p domain has several advantages. This study...
1990
The Effects of Fluvial Abrasion on the Shapes of Quartz Sand Grains
Mark Peterson , Jim Mazzullo
GCAGS Transactions
... with the Fourier technique and examined with the scanning electron microscope. The Fourier technique shows that there are no significant changes in the shapes...
1987
PINNslope: Physics-informed neural network slope prediction and interpolation with positional encoding
Francesco Brandolin, Matteo Ravasi, Tariq Alkhalifah
International Meeting for Applied Geoscience and Energy (IMAGE)
... functions (Linear Fourier Features, modified Linear Fourier Features, Random Fourier Features, Gaussian Encoding) are compared to evaluate which one will bene...
2023
Abstract: A Tour of High Resolution Transforms; #90171 (2013)
Mauricio D. Sacchi
Search and Discovery.com
... the inverse Fourier transform, and m the vector of unknown Fourier coefficients needed to fit the data (Sacchi and Ulrych, 1996). It is interested...
2013
Seismic Enhancement Resolution in Penobscot Field With Short-Time Fourier Transform Half Cepstrum Method
Taufiq Brilliant Askari, Intan Andriani Putri
Indonesian Petroleum Association
... complex. The final step is to reconstruct the signal back into the time domain. The inverse Fourier transform is performed on the modified STFT matrix...
2022
Abstracts: Accurate Declipping Hybrid Algorithm for Ground Penetrating Radar Data; #90173 (2015)
Akshay Gulati and R. J. Ferguson
Search and Discovery.com
... it finally converges to a solution. NFFT and F-1 represents non uniform fast Fourier transform and inverse fast Fourier transform which operates...
2015
Ultrasound reverse time migration for human brain imaging
Ting Li, Bo Feng, Yang Zhou, Rongwei Xu, Huazhong Wang
International Meeting for Applied Geoscience and Energy (IMAGE)
... ( x, t − Δt ) = 2 t 2 ( Δt ) where x denotes the vector coordinate (x, z), F is the spatial Fourier transform, and F-1 is the spatial inverse Fourier...
2024
Gabor Depth Migration using a New Adaptive Partitioning Algorithm
Yongwang Ma
Search and Discovery.com
... and the inverse Gabor transform gives the extrapolated wavefield at the new depth. Since each spatial window requires a separate Fourier transform...
Unknown
Gabor Depth Migration using a New Adaptive Partitioning Algorithm
Yongwang Ma
Search and Discovery.com
... and the inverse Gabor transform gives the extrapolated wavefield at the new depth. Since each spatial window requires a separate Fourier transform...
Unknown
Abstracts: FX Cadzow / SSA Random Noise Filter: Frequency Extension; #90173 (2015)
Alexander Falkovskiy, Elvis Floreani, Gerry Schlosser
Search and Discovery.com
... entries of the same inverse Fourier transform returns the filtered traces. Instead of composing these extended matrices only over space dimensions...
2015
Abstract: Variable-factor S-transform for Time-frequency Decomposition, Deconvolution, and Noise Attenuation; #90172 (2014)
Todor I. Todorov, Gary F. Margrave
Search and Discovery.com
... decomposition, which improves the resolution of the Gabor transform. The variable-factor S-transform One drawback of the Fourier transform...
2014
Abstracts: A New f-p Domain Weighting Function in Minimum Weighted Norm Interpolation of Seismic Data; #90173 (2015)
Zhengsheng Yao, Mike Galbraith, and Randy Kolesar
Search and Discovery.com
... to the other by some transform – e.g. a double Fourier Transform). In this paper, we will describe the f-p domain approach and show its advantages over...
2015
Construction and Application of a Stratigraphic Inverse Model
Timothy A. Cross, Margaret A. Lessenger
Special Publications of SEPM
...Construction and Application of a Stratigraphic Inverse Model Timothy A. Cross, Margaret A. Lessenger Copyright © 2012, Society for Sedimentary...
1999
Abstract: Land Seismic Noise Suppression: Tough Challenge, Intelligent Implementation, by Khalid Al-Rufaii and Weihong Zhu; #90077 (2008)
Search and Discovery.com
2008
Abstracts: Implicit Preconditioning for Least-squares Nonstationary Phase Shift; #90173 (2015)
Marcus R. Wilson and Robert J. Ferguson
Search and Discovery.com
... of a spatial fast Fourier transform, followed by multiplication by an extrapolation matrix, then an inverse fast Fourier transform. Written as matrices, we...
2015
Abstract: Efficency and Accuracy Enhancement for One-way Wave Equation Migration Through Improved Mapping Function in the Time-shift Imaging Condition; #90171 (2013)
Mark Ng
Search and Discovery.com
...(x,z1,ω) along all frequencies ω in order to estimate an image at every depth step), I (Ng, 2007) solve the image i(x,z) via a full inverse Fourier...
2013
Velocity continuation with Fourier neural operators for accelerated uncertainty quantification
Ali Siahkoohi, Mathias Louboutin, Felix J. Herrmann
International Meeting for Applied Geoscience and Energy (IMAGE)
... of their input, followed by a learned pointwise multiplication and an inverse Fourier transform. These layers act as long-kernel convolutional layer...
2022
Abstract: Surface-consistent Matching Filter for Time-lapse Processing; #90174 (2014)
Mahdi H. Almutlaq and Gary F. Margrave
Search and Discovery.com
...-hand-side contains its surface consistent components and the "hat" denotes the Fourier transform. However, computing the ratio of two spectra directly...
Unknown
Simultaneous source acquisition, accuracy, and deblending
Ray Abma
International Meeting for Applied Geoscience and Energy (IMAGE)
..., and when the inverse Fourier transform is applied, an estimate of the signal is obtained. This estimate of the signal is used to remove both...
2024
Deep learning seismic full-waveform inversion and transient EM joint inversion for near surface velocity modeling
Daniele Colombo, Ernesto Sandoval-Curiel, Ersan Turkoglu, Weichang Li
International Meeting for Applied Geoscience and Energy (IMAGE)
...-Fourier domain. The Laplace-Fourier domain is chosen to transform the field data where the secondary arrivals, such ground roll, can be effectively...
2022
The emergence and impact of scientific machine learning in geophysical exploration
Umair bin Waheed
International Meeting for Applied Geoscience and Energy (IMAGE)
... in the field of geophysical modeling and inversion using emerging SciML paradigms, including physics-informed neural networks (PINNs), Fourier neural...
2023