Results 21 to 30 of about 505,829 (274)

3-D cross-gradient joint inversion of seismic refraction and DC resistivity data [PDF]

Journal of Applied Geophysics, 2017
Abstract We present a 3-D cross-gradient joint inversion algorithm for seismic refraction and DC resistivity data. The structural similarity between seismic slowness and resistivity models is enforced by a cross-gradient term in the objective function that also includes misfit and regularization terms.
Shi, Zhanjie, Hobbs, Richard W., Moorkamp, Max, Tian, Gang, Jiang, Lu   +4 more
openaire   +2 more sources

Collective diffusion in sheared colloidal suspensions [PDF]

, 2008
Collective diffusivity in a suspension of rigid particles in steady linear viscous flows is evaluated by investigating the dynamics of the time correlation of long-wavelength density fluctuations.
Brady, John F., Leshansky, Alexander M., Morris, Jeffrey F.   +2 more
core   +1 more source

High order resolution of the Maxwell-Fokker-Planck-Landau model intended for ICF applications [PDF]

, 2008
A high order, deterministic direct numerical method is proposed for the nonrelativistic $2D_{\bf x} \times 3D_{\bf v}$ Vlasov-Maxwell system, coupled with Fokker-Planck-Landau type operators.
Alouani-Bibi, Bell, Bennaceur-Doumaz, Brantov, Brantov, Bret, Bret, Bruno Dubroca, Buet, Buet, Buet, Crouseilles, Degond, Epperlein, Epperlein, Feugeas, Filbet, Filbet, Francis Filbet, Frolov, Froula, Haines, Kingham, Kingham, Kurganov, Larroche, Le Bourdiec, Lemou, Limpouch, Matte, Nicolaï, Pareshi, Ridgers, Roland Duclous, Sangam, Santos, Senecha, Sentoku, Tabak, Van Leer, Vladimir Tikhonchuk, Xiong, Yamamoto, Yokota   +43 more
core   +3 more sources

Free Vibration Behavior of a Gradient Elastic Beam with Varying Cross Section

Shock and Vibration, 2014
Based on strain gradient elasticity theory, a finite element procedure is proposed for computation of natural frequencies for the microbeams of constant width and linear varying depth.
Mustafa Özgür Yayli
doaj   +1 more source

Gravity and magnetic fast inversion method with cross-gradient based on function fitting

Geophysical Journal International, 2022
SUMMARY The underground density and magnetic susceptibility structure obtained by cross-gradient inversion of gravity and magnetic data can provide an important basis for the evaluation of mineral resource potential. The inversion is realized by discretizing the subsurface into a series of cells and calculating the physical properties of
Zongrui Li, Guoqing Ma, Qingfa Meng, Taihan Wang, Lili Li   +4 more
openaire   +1 more source

Application of a new Structural Joint Inversion Approach to Teleseismic and Gravity Data from Mt.Vesuvius, Italy [PDF]

, 2008
A 3-D joint inversion of seismic and gravimetric data is performed to re-investigate the subsurface structure of Mt. Vesuvius (Italy) utilizing an improved joint inversion method. The aim is to derive models of the 3D distribution of velocity and density
Arne Thomas (1689718), Bin Luo (303443), Bin Wang (30851), Jing Ning (1481449), Junhe Yang (1689721), Linjie Zhi (1661425), Long Hao (477700), Yunbo Zhang (1661422), Zhihong Tang (1543603)   +8 more
core   +3 more sources

The Influence Of Temperature Gradient On Stereological Parameters Of Carbide Phase On Cross-Section Of Abrasive Wear Resistant Chromium Cast Iron

Archives of Metallurgy and Materials, 2015
In the paper analysis of temperature gradient and parameters of structure on casting cross-section of abrasive wear resistant chromium cast iron at carbon content of 2,5%wt. and chromium 17%wt. with nickel and molybdenum additives are presented.
Studnicki A., Suchoń J., Wróbel T., Szajnar J.   +3 more
doaj   +1 more source

Three-Dimensional Time-Lapse Joint Inversion of Resistivity and Time-Domain Induced Polarization Methods

Applied Sciences
The resistivity method and time-domain induced polarization (TDIP) method are two branches of electrical geophysical prospecting. In recent years, researchers have implemented time-lapse resistivity inversion and time-lapse TDIP inversion based on time ...
Depeng Zhu, Huan Ma, Youxing Yang
doaj   +1 more source

Dimer with gain and loss: Integrability and $\mathcal{PT}$-symmetry restoration

, 2015
A $\mathcal{PT}$-symmetric nonlinear Schr\"odinger dimer is a two-site discrete nonlinear Schr\"odinger equation with one site losing and the other one gaining energy at the same rate.
Barashenkov, I. V., Dubard, P., Pelinovsky, D. E.   +2 more
core   +1 more source

Optimal orientation estimators for detection of cylindrical objects [PDF]

, 2008
International audienceThis paper introduces low level operators in the context of detecting cylindrical axis in 3 D images. Knowing the axis of a cylinder is particularly useful since cylinder location, length and curvature derive from this knowledge ...
Baylou, Pierre, Donias, Marc, Germain, Christian, Mulat, Christianne, Vignoles, Gérard   +4 more
core   +3 more sources