نتایج جستجو برای: geophysical technique

تعداد نتایج: 620629  

2016
D. J. Scheeres S. G. Hesar M. Hirabayashi J. W. McMahon O. Barnouin W. F. Bottke M. G. Daly M. C. Nolan

An analysis of the surface and interior state of Asteroid (101955) Bennu, the target asteroid of the OSIRISREx sample return mission, is given using models based on Earth-based observations of this body. These observations have enabled models of its shape, spin state, mass and surface properties to be developed. Based on these data the range of surface and interior states possible for this body...

2009
Eric DeGiuli

The problem of turbulent flow in a rough pipe of arbitrary shape is considered. The classical Izakson-Millikan argument for a logarithmic velocity profile is presented, and matched asymptotic expansions are introduced. Scaled, dimensionless equations are produced and simplified. A simple mixing length turbulence model is presented, which closes the problem. To calibrate the model, the mechanica...

1985
B. Sivakumar C. E. Puente

Introduction Conclusions References Tables Figures Back Close Full Screen / Esc Papers published in Hydrology and Earth System Sciences Discussions are under open-access review for the journal Hydrology and Earth System Sciences Abstract Introduction Conclusions References Tables Figures Back Close Full Screen / Esc Abstract It has been customary in the last few decades to employ stochastic mod...

2007
Roel Snieder Susan Hubbard Matthew Haney Gerald Bawden Paul Hatchell André Revil

Geophysical methods can be used to create images of the Earth’s interior that constitute snapshots at the moment of data acquisition. In many applications, it is important to measure the temporal change in the subsurface, because the change is associated with deformation, fluid flow, temperature changes, or changes in material properties. We present an overview of how noninvasive geophysical me...

2008
SUSHIL SHETTY PHILIP S. MARCUS

Jupiter’s Great Red Spot (GRS) has been observed in sufficient detail that we can use it to determine properties of the jovian atmosphere that cannot otherwise be found. These properties include: the potential vorticity of the GRS and its neighboring zonal jet streams, the shear imposed on the GRS by the jet streams, and the vertical entropy gradient (i.e., Rossby deformation radius). We show t...

2003
Guo-zhong Gao Sheng Fang Carlos Torres-Verdín

Integral equations have been widely used to solve EM scattering problems, including those arising in geophysical prospecting and antenna applications. Hohmann (1971) first discussed the application of integral equations to the simulation of two-dimensional (2D) subsurface geophysical problems. Since then, a number of applications and developments have been reported that include 3D EM scattering...

2017
Marie Cooper

Cooper, M., Beck, E., and Woolery, E., 2016 Integrated Geophysical Methods forCorrelating the Upper Mississippi Embayment Aquifer System Hydrostratigraphy:Jackson Purchase, Western Kentucky U.S.A.: Southeastern Geological Society ofAmerica Abstracts with Programs, v. 48, no. 3, p. 28-9. Cooper, M., Beck, E., and Woolery, E., 2016 Investigation of the Upper MississippiEmbayment A...

2010
J. H. Kroll J. L. Jimenez K. S. Docherty P. F. DeCarlo A. C. Aiken Q. Chen S. T. Martin D. K. Farmer C. L. Heald

Citation Heald, C. L., J. H. Kroll, J. L. Jimenez, K. S. Docherty, P. F. DeCarlo, A. C. Aiken, Q. Chen, S. T. Martin, D. K. Farmer, and P. Artaxo (2010), A simplified description of the evolution of organic aerosol composition in the atmosphere, Geophys. Res. Lett., 37, L08803, doi:10.1029/2010GL042737. ©2010 American Geophysical Union As Published http://dx.doi.org/10.1029/2010GL042737 Publish...

Journal: :CoRR 2009
Adel Ammar Sylvie Labroue Estelle Obligis Michel Crépon Sylvie Thiria

This article deals with an important aspect of the neural network retrieval of sea surface salinity (SSS) from SMOS brightness temperatures (TBs). The neural network retrieval method is an empirical approach that offers the possibility of being independent from any theoretical emissivity model, during the in-flight phase. A Previous study [1] has proven that this approach is applicable to all p...

1997
Agnes Schumann

Recently, Neural Networks became a popular method in geosciences in the context of pattern recognition problems. They can be used for classification of well logs, for image processing, for anomaly detection and similar problems. In the past, such problems were mainly solved by statistical approaches. However parametric statistical classification methods suffer from strong assumptions and nonpar...

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