Results 11 to 20 of about 155,220 (263)
Applied Sciences, 2023 The in situ stress distribution is one of the driving factors for the design and construction of underground engineering. Numerical analysis methods based on artificial neural networks are the most common and effective methods for in situ stress ...
Hong-Chuan Yan +7 more
doaj +1 more source
Shipin gongye ke-ji, 2023 Moisture diffusivity is an important physical parameter in food proceeding. The primary method used to estimate the water diffusion coefficient is based on the second Fick’s law, but there are significant differences in the way in which these laws are ...
Wangming LI +4 more
doaj +1 more source
Seismic Lg-wave attenuation tomography: Method, algorithm, data processing flow and application
地球与行星物理论评, 2022 With the rapid development of modern seismic network, seismological signals can be digitally recorded in broad frequency band, larger dynamic range, and higher spatial density, which provide the possibility of obtaining fine structures of the quality ...
Lianfeng Zhao +5 more
doaj +1 more source
AC-IBFGS-Based Inversion Method for Estimating the Quasi-Viscoelastic Parameters of Arch Dams
IEEE Access, 2022 This article investigates an inverse problem for variable physical and mechanical comprehensive parameters. A back analysis method based on an improved BFGS (Broyden-Fletcher-Goldfarb Shanno-Newtonian iteration) and AC (adjustment coefficient) is ...
Hao Gu +3 more
doaj +1 more source
Multi-field coupling analysis of water-heat-salt in composite unsaturated soils
Yantu gongcheng xuebao, 2022 The multi-field coupling problem of water, heat and salt in the composite unsaturated soils composed of unsaturated clay and unsaturated sand is studied. Based on the mass and energy conservation equations for porous media, the temperature, pore pressure,
GAO Guo-yao 1, GUO Wei 1, ZHOU Feng-xi 2
doaj +1 more source
Remote Sensing, 2020 Integrated-path differential absorption (IPDA) LiDAR is a promising means of measuring the global distributions of the column weighted xCO2 (dry-air mixing ratio of CO2) with adequate accuracy and precision.
Ge Han +6 more
doaj +1 more source
Symposium - International Astronomical Union, 1998 I want to start by addressing the question, ‘What is inversion?’ My answer would be that inversion is the process of going from data to making inferences about the object under study. In the case of helioseismology, the data at the present time are principally the mode frequencies, and the object under study is the solar interior.
openaire +2 more sources
Data-driven acoustic impedance inversion with reweighted L1 norm sparsity constraint
Frontiers in Earth Science, 2023 Acoustic impedance (AI) inversion is widely used in geophysics and reservoir prediction. But the traditional impedance inversion method cannot fully exploit the sparse characteristics of geological attributes. There are problems with multiplicity and low
Lian Zhao +7 more
doaj +1 more source
Differential Methods in Inverse Scattering [PDF]
SIAM Journal on Applied Mathematics, 1985 This paper discusses a new set of differential methods for solving the inverse scattering problem associated to the propagation of waves in an inhomogeneous medium. By writing the medium equations in the form of a two-component system describing the interaction of rightward and leftward propagating waves, the causality of the propagation phenomena is ...
Bruckstein, Alfred M. +2 more
openaire +1 more source
Direct Inversion Method of Brittleness Parameters Based on Reweighted Lp-Norm
Applied Sciences, 2022 Brittleness is an important factor that indicates shale properties, as well as fracturability, and it can be well-represented using the elasticity parameter Eρ. Seismic inversion allows direct access to the Eρ ofbrittleness parameters.
Yaojie Chen +4 more
doaj +1 more source