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The AAPG/Datapages Combined Publications Database
Showing 1,338 Results. Searched 195,364 documents.
An Exact Method for Characterization of Grain Shape
Robert Ehrlich, Bernhard Weinberg
Journal of Sedimentary Research (SEPM)
... as precisely as needed by Fourier series expansion of the radius about the center of mass utilizing coordinates of peripheral points. Empirical results...
1970
Origin of Patterns of Quartz Sand Types on the Southeastern United States Continental Shelf and Implications on Contemporary Shelf Sedimentation--Fourier Grain Shape Analysis
P. Jeffrey Brown , Robert Ehrlich, Donald J. Colquhoun
Journal of Sedimentary Research (SEPM)
...--Fourier Grain Shape Analysis P. Jeffrey Brown , Robert Ehrlich, Donald J. Colquhoun 1980 Vol. 50 No. 4. (December), Quartz sands in the fine sand range...
1980
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, modiļ¬ed Linear Fourier Features, Random Fourier Features, Gaussian Encoding) are compared to evaluate which one will bene...
2023
Roughness of Limestone and Quartzite Pebbles by the Modified Fourier Method
Eliza Czarnecka, J. E. Gillott
Journal of Sedimentary Research (SEPM)
... be detected and analyzed quantitatively by the modified Fourier procedure. This sensitive method of analysis of planar sections of particles is combined...
1980
ABSTRACT: THE VARIATION OF ORGANIC MATTER IN THE WEATHERING OF COAL GANGUE AND PROCESS SOIL FORMING
Juan-juan Li, Yuegang Tang, Jintao Ma, Xiaole Shi
The Society for Organic Petrology (TSOP)
... analysis, Fourier transform infrared spectroscopy and cross-polarization with magic angle spinning 13 C nuclear magnetic resonance (CP-MAS 13C NMR...
2006
The Effects of Fluvial Abrasion on the Shapes of Quartz Sand Grains
Mark Peterson , Jim Mazzullo
GCAGS Transactions
... series inclosed form (Ehrlich and Weinberg, 1970). In a Fourier analysis, the digitized shape is partitioned into a series of 23 standard shape...
1987
POCS Method for Seismic Data Reconstruction of Irregularly Sampled Data
Elwyn J. Galloway
Search and Discovery.com
... is the fourier transform operator, T k is a threshold operator, and B is a band-limiting operator. The threshold operator acts to remove any points below...
Unknown
POCS Method for Seismic Data Reconstruction of Irregularly Sampled Data
Elwyn J. Galloway
Search and Discovery.com
... is the fourier transform operator, T k is a threshold operator, and B is a band-limiting operator. The threshold operator acts to remove any points below...
Unknown
Abstract: Spatial Analysis of Fabric Elements in the Berea Sandstone through Petrographic Image Analysis, by M. B. Carr and C. A. Paschke; #90937 (1998)
Search and Discovery.com
1998
Abstract: Spatial Analysis of Fabric Elements in the Berea Sandstone through Petrographic Image Analysis, by M. B. Carr and C. A. Paschke; #90928 (1999).
Search and Discovery.com
1999
High-resolution angle gather tomography with Fourier neural operators
Sean Crawley, Guanghui Huang, Ramzi Djebbi, Jaime Ramos, Nizar Chemingui
International Meeting for Applied Geoscience and Energy (IMAGE)
...High-resolution angle gather tomography with Fourier neural operators Sean Crawley, Guanghui Huang, Ramzi Djebbi, Jaime Ramos, Nizar Chemingui High...
2023
Abstract: Prestack Depth Migration with the Gabor Transform; #90211 (2015)
Yongwang Ma and Gary Margrave
Search and Discovery.com
...-interpolation (GPSPI) wavefield extrapolation using a Gabor, or windowed Fourier, transform to localize the wavefield. The key to an efficient algorithm...
2015
Abstract: Inversion Approach to Calculate Instantaneous Frequency; #90174 (2014)
Jiajun Han and Mirko van der Baan
Search and Discovery.com
..., and other three different frequency components between 1.3s and 1.7s. We compare the instantaneous spectrum analysis with the Short-time Fourier...
2014
New Techniques for Stratigraphic Analysis and Correlation--Fourier Grain Shape Analysis Louisiana Offshore Pliocene
John V. Mrakovich, Robert Ehrlich, Bernhard Weinberg
Journal of Sedimentary Research (SEPM)
...New Techniques for Stratigraphic Analysis and Correlation--Fourier Grain Shape Analysis Louisiana Offshore Pliocene John V. Mrakovich, Robert Ehrlich...
1976
Abstract: Making FX Interpolation More Robust by Spectrum-guided Reconstruction; #90171 (2013)
Mostafa Naghizadeh and Mauricio Sacchi
Search and Discovery.com
... is a combination of a Fourier reconstruction method (Sacchi and Liu, 2004) and f-x interpolation (Spitz, 1991). MSAR can be summarized as follows: 1) The low...
2013
Gabor Depth Migration using a New Adaptive Partitioning Algorithm
Yongwang Ma
Search and Discovery.com
... migration, the temporal Fourier transform is applied to the input seismic data to transform to the frequency domain. Then the spatial Fourier...
Unknown
Gabor Depth Migration using a New Adaptive Partitioning Algorithm
Yongwang Ma
Search and Discovery.com
... migration, the temporal Fourier transform is applied to the input seismic data to transform to the frequency domain. Then the spatial Fourier...
Unknown
ABSTRACT: Infrared Microspectroscopy: An Efficient Tool for Micro-Scale Characterization of Organic Matter
P. Landais and A. Rochdi
The Society for Organic Petrology (TSOP)
... analysis. Fourier transform infrared (FTIR) spectroscopy is a widely used technique in organic geochemistry which facilitates the functional analysis...
1990
A Preliminary Study of the Relationship Between Test Morphology and Bathymetry in Recent Bolivina Albatrossi Cushman, Northwestern Gulf of Mexico
Anthony C. Gary
GCAGS Transactions
... Anthony C. Gary 1985 Vol. 35 (1985), An automated video digitizer and closed-form Fourier series analysis are used in this study to quantify benthic...
1985
ABSTRACT: Interaction of Marine and Fluvial Clastic Sedimentation, Central Italy, Tyrrhenian Coast, by S. Evangelista, W. E. Full, and P. Tortora; #91022 (1989)
Search and Discovery.com
1989
Morphostratigraphy of Foraminifera Via Automated Image Analysis: ABSTRACT
N. Healy-Williams, L. Robbins, R. Ehrlich
AAPG Bulletin
... specimens per hour. The subsequent analysis of shape changes is via closed-form Fourier se ies and multivariate statistical techniques. Through...
1984
ABSTRACT: Improving Curvature Analyses of Deformed Horizons Using Scale-Dependent Filtering Techniques; #90013 (2003)
Stephan Bergbauer, Tapan Mukerji, Peter H. Hennings
Search and Discovery.com
... the suitability of four numerical techniques (Fourier analysis, wavelet transform filtering, singular value decomposition, factorial kriging...
2003
Optical Methods and Equipment for Processing Geophysical Data: ABSTRACT
Arthur L. Ingalls
AAPG Bulletin
... analysis filtering and cross correlation. The equipment for optical data processing has a high degree of versatility and stability. The versatility...
1965
Abstracts: Gabor Multipliers for Seismic Modeling and Wavefield Propagators; #90173 (2015)
Michael P. Lamoureux, Gary F. Margrave, and Peter C. Gibson
Search and Discovery.com
... by Gabor multipliers and generalized frame operators. These numerical algorithms are based on a localized version of the Fourier transform and share many...
2015
ABSTRACT: Examples of Enhanced Spectral Processing in Direct Hydrocarbon Detection; #90007 (2002)
Sun, Shengjie, John P. Castagna, Robert W. Siegfried
Search and Discovery.com
... eliminates the windowing problem in Fourier spectral analysis and has very high resolution in time and frequency. Synthetic studies show...
Unknown