نتایج جستجو برای: fwi
تعداد نتایج: 273 فیلتر نتایج به سال:
Fire danger is the resultant of ‘factors affecting the inception, spread and difficulty of control of fires and the damage they cause’ (Chandler et al. 1983). If any of these factors are absent, then there is no fire danger (Cheney and Gould 1995). Fire danger rating is ‘a fire management system that integrates the facets of selected fire danger factors into one or more qualitative or numerical...
In this paper we study the evolution of sequential dynamical systems (SDS) as a result of the erroneous replication of the SDS words. An SDS consists of (a) a finite, labeled graph Y in which each vertex has a state, (b) a vertex labeled sequence of functions (Fvi,Y ), and (c) a word w, i.e. a sequence (w1, . . . , wk), where each wi is a Y -vertex. The function Fwi,Y updates the state of verte...
Full waveform inversion (FWI) of seismic or Ground Penetrating Radar data provides high-resolution quantitative images of the constitutive parameters of the rock/soil which control seismic/GPR wave propagation. We developed a 2D inversion tool in the frequency domain adapted to the multi-parameter physics controlling GPR propagation in isotropic non dispersive media, i.e. dielectric permittivit...
Full-Waveform Inversion (FWI) is a high-resolution technique used in geophysics to evaluate the physical parameters and construct subsurface models noisy limited data scenario. The ill-posed nature of FWI turns this challenging problem since more than one model can match observations. In probabilistic way, solving demands efficient sampling techniques infer information on estimate uncertainties...
Despite being a religious country, the Kingdom of Saudi Arabia (KSA) ranks among world’s worst food wasters. Social media usage (SMU) and changes in customers’ behavior, such as excessive buying, are some main influences waste. This paper examined impact SMU on waste intention (FWI) with mediating role religiosity buying behavior amid coronavirus (COVID-19) pandemic. A self-administered questio...
Fire danger indices are descriptors of fire potential in a large area, and combine a few variables that affect the initiation, spread and control of forest fires. The Canadian Fire Weather Index (FWI) is one of the most widely used fire danger indices in the world, and it is built upon instantaneous values of temperature, relative humidity and wind velocity at noon, together with 24 hourly accu...
Producing reliable acoustic subsurface velocity models still remains the main bottleneck of oil and gas industry’s traditional imaging sequence. In complex geologic settings, output conventional ray-based or wave-equation-based tomographic methods may not be sufficiently accurate for full-waveform inversion (FWI) to converge a geologically satisfactory earth model. We create new method referred...
Full-waveform inversion (FWI) is popularly used to obtain a high-resolution subsurface velocity model. However, it requires either good initial model or low-frequency data mitigate the cycle-skipping issue. Reflection-waveform (RWI) uses migration/demigration process retrieve background that can be as in FWI. The drawback of conventional RWI use least-squares migration, which often computationa...
Full waveform seismic inversion (FWI) in the viscoelastic regime entails task of identifying parameters wave equation from partial measurements. Traditionally, one frames this nonlinear problem as an operator for parameter-to-state map. Alternatively, all-at-once approach, augments by additional component and considers states variables. Hence, are sought simultaneously. In article, we give a ma...
A Markov chain Monte Carlo (MCMC) simulation is proposed for probabilistic full waveform inversion (FWI) in a layered half-space. Dynamic responses on the half-space surface are estimated using thin-layer method when harmonic vertical force applied. Subsequently, posterior probability distribution function and corresponding objective formulated to minimize difference between estimations observe...
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