搜索结果: 1-14 共查到“地球物理学 stochastic”相关记录14条 . 查询时间(0.218 秒)
A comparative study of a stochastic and deterministic simulation of strong ground motion applied to the Kozani-Grevena (NW Greece) 1995 sequence
simulation ground motion earthquake EGF-Kozani
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2015/9/30
We present the results of a comparative study of two intrinsically different methodologies, a stochastic one and a deterministic one, performed to simulate strong ground motion in the Kozani area (NW ...
Stochastic interpretation of magnetotelluric data,comparison of methods
magnetotelluric method inverse problem controlled random search Markov chain Monte Carlo neighbourhood algorithm
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2015/9/2
Global optimization and stochastic approaches to the interpretation of measured data have recently gained particular attraction as tools for directed search for and/or verification of characteristic s...
The stochastic quantization method and its application to the numerical simulation of volcanic conduit dynamics under random conditions
stochastic quantization method application to the numerical simulation volcanic conduit dynamics random conditions
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2014/12/31
Stochastic Quantization (SQ) is a method for the approximation of a continuous probability distribution with a discrete one. The proposal made in this paper is to apply this technique to reduce the nu...
Can the Earth’s harmonic spectrum be derived directly from the stochastic inversion of global travel-time data?
Earthquake GPS Historical seismology Ionosphere Irpinia
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2015/8/18
A set of seismic observations which all sample the same structure in the same way should have zero variance. This is naturally the case if all sources are in the same place, and the data are recorded ...
Shallow seismicity in the area of Greece:its character as seen by means of a stochastic model
Shallow seismicity area of Greece means of a stochastic model
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2009/11/16
Occurrence of successive earthquake events in space is analysed by means of semi-stochastic processes. The analysis employs earthquakes events with M > 5.2 from the area of Greece and its surroundings...
A note on chaotic vs. stochastic behavior of the high-latitude ionospheric plasma density fluctuations
stochastic behavior high-latitude ionospheric plasma density fluctuations
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2009/11/16
Four data sets of density fluctuations measured in-situ by the Dynamics Explorer (DE 2) were analyzed in an attempt to study chaotic nature of the high-latitude turbulence and, in this way to compleme...
Response of a global atmospheric circulation model to spatio-temporal stochastic forcing:ensemble statistics
global atmospheric circulation model spatio-temporal stochastic forcing ensemble statistics
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2009/11/12
The response of a simplified global atmospheric circulation model (PUMA) to spatiotemporal stochastic forcing is analyzed using the statistical measures originally developed for ensemble forecast eval...
A non-linear and stochastic response surface method for Bayesian estimation of uncertainty in soil moisture simulation from a land surface model
response surface method Bayesian estimation soil moisture simulation land surface model
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2009/11/11
This study presents a simple and efficient scheme for Bayesian estimation of uncertainty in soil moisture simulation by a Land Surface Model (LSM). The scheme is assessed within a Monte Carlo (MC) sim...
Stochastic resonance in a nonlinear model of a rotating,stratified shear flow,with a simple stochastic inertia-gravity wave parameterization
Stochastic resonance nonlinear model shear flow stochastic inertia-gravity wave parameterization
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2009/11/11
We report on a numerical study of the impact of short, fast inertia-gravity waves on the large-scale, slowly-evolving flow with which they co-exist. A nonlinear quasi-geostrophic numerical model of a ...
Stochastic parametric resonance in shear flows
Stochastic parametric resonance shear flows
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2009/11/11
Time-periodic shear flows can give rise to Parametric Instability (PI), as in the case of the Mathieu equation (Stoker, 1950; Nayfeh and Mook, 1995). This mechanism results from a resonance between th...
Evolution of localized vortices in the presence of stochastic perturbations
Evolution of localized vortices presence of stochastic perturbations
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2009/11/9
We consider the evolution of a distribution of N identical point vortices when stochastic perturbations in the Hamiltonian are present. It is shown that different initial configurations of vorticity w...
Turning the resistive MHD into a stochastic field theory
resistive MHD stochastic field theory
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2009/11/2
Classical systems stirred by random forces of given statistics may be described via a path integral formulation in which their degrees of freedom are stochastic variables themselves, undergoing a mult...
The stochastic multiplicative cascade structure of deterministic numerical models of the atmosphere
stochastic multiplicative cascade structure deterministic numerical models atmosphere
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2009/10/30
By direct statistical analysis we show that over almost all their range of scales and to within typically better than ±1%, atmospheric fields obtained from analyses and numerical integrations of atmos...
Removal of Ambiguities in Meteorological Fields Through Stochastic Minimization of Spatial Variability
Simulated annealing maximum smoothness of a meteorological field equivalent-potential temperature surfaces cloud motion vectors
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2009/6/10
Sometimes there are a finite number of options for the value of a meteorological variable at a
grid point. When no physical selection criterion is available, values are likely to be chosen in such a ...