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Should We Move towards Multi-parameter Elastic Inversions?
Second EAGE/PESGB Workshop on Velocities, 2019Summary In its standard least-square formulation, full waveform inversion aims at matching both the phases and the amplitudes of the recorded events. The dynamics of the seismic waves, especially of the reflection waves are of elastic nature. Moreover, earth parameter variations inside the first Fresnel zone induce interference patterns that may also ...
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Multi-parameter gradient procedure for polarimetry data inversion in tokamak plasma
Fusion Engineering and Design, 2013Abstract Multi-parameter gradient procedure is suggested which allows fitting tokamak plasma model to polarimetric data. One of the simplest version of gradient procedure deals with four parameters model: maximum values of electron density, maximum value of electric current density in plasma, common radius of electron density, electric current ...
J. Chrzanowski +2 more
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2009 International Joint Conference on Computational Sciences and Optimization, 2009
Based on a mathematical model for multi-components solutes transportation in porous medium, an inverse problem of determining multi-parameters is put forward, and the inverse problem is transformed to a minimization problem. Furthermore, a modified optimal iteration algorithm is applied to determine the unknown model parameters and numerical ...
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Based on a mathematical model for multi-components solutes transportation in porous medium, an inverse problem of determining multi-parameters is put forward, and the inverse problem is transformed to a minimization problem. Furthermore, a modified optimal iteration algorithm is applied to determine the unknown model parameters and numerical ...
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Inversion for Multi-Parameter Depth-Profiles: Thermal Conductivity and Thermal Impedance
1999Recently, the depth profile reconstruction of the thermal conductivity or diffusivity of inhomogeneous samples has attracted considerable interest [1–4]. But in most of these works, a mathematical model for unknown profiles was a prior assumed, then some parameters were adjusted to fit the measured data.
Xu, M. H., Cheng, J. C., Zhang, S. Y.
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On the multi‐parameters identification of concrete dams: A novel stochastic inverse approach
International Journal for Numerical and Analytical Methods in GeomechanicsAbstractThis paper introduces a novel stochastic inverse method that utilizes perturbation theory and advanced intelligence techniques to solve the multi‐parameter identification problem of concrete dams using displacement field monitoring data. The proposed method considers the uncertainties associated with the dam displacement monitoring data, which ...
Chaoning Lin +5 more
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Resolution of Multi-Parameter Ray+Born Inversion
59th EAGE Conference & Exhibition, 1997E. Forgues, G. Lambaré
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POCS-based geophysical constraints in multi-parameter Full Wavefield Inversion
Proceedings, 2013Simultaneous updating of several parameters in Full Wavefield Inversion (FWI) can lead to poor convergence and unsatisfactory results due to cross-talk among various inversion parameters. Even more dangerously, certain parameter combinations may correspond to physically unrealizable models, leading to instabilities in forward simulations. Both types of
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Time-frequency mixed domain multi-trace simultaneous inversion method
Geoenergy Science and Engineering, 2023Lian Zhao
exaly