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The AAPG/Datapages Combined Publications Database
Showing 1,338 Results. Searched 195,364 documents.
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: 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
Abstract: Quantitative Paleobathymetry Using Geochemistry and Shape Analysis of Benthic Foraminifera, Offshore Gulf of Mexico
Douglas F. Williams , Anthony C. Gary , Nancy Healy-Williams
GCAGS Transactions
... foraminifera using fourier series analysis have shown that many taxa exhibit shape changes which are also correlatable to known environmental variables...
1988
ABSTRACT: Morphometric Analysis of Sphaeroidinellopsis: New Biostratigraphic Information from Gradually Evolving Lineages, by A. C. Gary, N. Healy-Williams, and D. F. Williams; #91043 (2011)
Search and Discovery.com
2011
Grain Size-Frequency Distributions from Thin-Section Data: NOTES
N. H. Gray
Journal of Sedimentary Research (SEPM)
... Crofts, N.Y. 549 p. STOKES, A. R., 1948. A numerical Fourier-analysis method for the correction of widths and shapes of lines on X-ray powder photographs...
1969
ABSTRACT: Avoiding Pitfalls When Mapping with Personal Computers, by Joseph E. Robinson and Paul D. Willette; #91022 (1989)
Search and Discovery.com
1989
ABSTRACT: Avoiding Pitfalls When Mapping with Personal Computers, by Joseph E. Robinson and Paul D. Willette; #91025 (2010)
Search and Discovery.com
2010
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
Decoding Molecular Geochemistry of Kerogen From Marcellus Shale
Search and Discovery.com
N/A
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: 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
Abstracts: Accurate Declipping Hybrid Algorithm for Ground Penetrating Radar Data; #90173 (2015)
Akshay Gulati and R. J. Ferguson
Search and Discovery.com
... combination of Kaiser Bessel Non uniform fast Fourier transform (NFFT) and Projection on Convex Set (POCS) to restore clippings. This algorithm is tested...
2015
Abstract: Time-Frequency Polarization Analysis and Filtering; #90211 (2015)
Robert Pinnegar
Search and Discovery.com
...Abstract: Time-Frequency Polarization Analysis and Filtering; #90211 (2015) Robert Pinnegar Datapages/Search and Discovery Article #90211 CSPG© 2015...
2015
Abstract: Characterizing Spatial Deformation Patterns in a Laramide Rocky Mountain Basin; #90301 (2017)
Cody W. Bomberger, Brianna Berg, Jenica Andersen, Michael H. Hofmann
Search and Discovery.com
... that are important to hydrocarbon exploration. Using techniques from Fourier analysis, expanded into two dimensions, we identify characteristic scales of structural...
2017
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
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
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
... such coarse wavefield extrapolation depth steps are employed. Specifically, I incorporate a simple split-step Fourier statics correction term...
2013
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
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
Target-Oriented Parameters for Curvature Attributes Computation; #42146 (2017)
Lee Hunt, Bahaa Beshry, Satinder Chopra, Cole Webster
Search and Discovery.com
... along horizontal wells. One of the methods of computing seismic volumetric curvature attribute involves Fourier filtering, and has gained widespread...
2017
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: 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
Abstract: 5D Interpolation of Seismic Data with Combination of MWNI and POCs Algorithm; #90187 (2014)
Jianhua Pan, Gerry Schlosser, Elvis Floreani, and Robert Tilson
Search and Discovery.com
.... Each iteration consists of a 4D Fourier transformation of the data, an application of a threshold to the transformed data removing low amplitudes...
2014