Results 11 to 20 of about 11,149 (99)

3D Reconstruction of Non-Lambertian Surfaces by Perspective Shape-From-Shading With Fast Viscosity Solution

open access: yesFrontiers in Physics, 2022
Shape-from-shading (SFS) is an important method to reconstruct three-dimensional (3D) shape of a surface in photometry and computer vision. Lambertian surface reflectance and orthographic camera projection are two fundamental assumptions which generally ...
Guohui Wang, Hao Zheng
doaj   +1 more source

Approximate solutions of the Riemann problem for a two-phase flow of immiscible liquids based on the Buckley–Leverett model [PDF]

open access: yesҚарағанды университетінің хабаршысы. Математика сериясы, 2022
The article proposes an approximate method based on the "vanishing viscosity" method, which ensures the smoothness of the solution without taking into account the capillary pressure.
Y.S. Aldanov   +2 more
doaj   +3 more sources

A double-phase eigenvalue problem with large exponents

open access: yesOpen Mathematics, 2023
In the present article, we consider a double-phase eigenvalue problem with large exponents. Let λ(pn,qn)1{\lambda }_{\left({p}_{n},{q}_{n})}^{1} be the first eigenvalues and un{u}_{n} be the first eigenfunctions, normalized by ‖un‖ℋn=1\Vert {u}_{n}{\Vert
Yu Lujuan
doaj   +1 more source

Monte-Carlo methods for the pricing of American options: a semilinear BSDE point of view [PDF]

open access: yesESAIM: Proceedings and Surveys, 2019
We extend the viscosity solution characterization proved in [5] for call/put American option prices to the case of a general payoff function in a multi-dimensional setting: the price satisfies a semilinear reaction/diffusion type equation. Based on this,
Bouchard Bruno   +3 more
doaj   +1 more source

A Bank Salvage Model by Impulse Stochastic Controls

open access: yesRisks, 2020
The present paper is devoted to the study of a bank salvage model with a finite time horizon that is subjected to stochastic impulse controls. In our model, the bank’s default time is a completely inaccessible random quantity generating its own ...
Francesco Giuseppe Cordoni   +2 more
doaj   +1 more source

Study on Factors Influencing the Viscosity of Sodium Carboxymethyl Cellulose Used in Capsule-Mucous Sealers

open access: yesGeofluids, 2022
A decrease in the viscosity of a solution of sodium carboxymethyl cellulose (CMC-Na) is a commonly encountered problem in coalbed methane (CBM) pressure measurement with an apron CMC-Na sealer and capsule CMC-Na sealer.
Fakai Wang   +5 more
doaj   +1 more source

Generalized Liouville theorem for viscosity solutions to a singular Monge-Ampère equation

open access: yesAdvances in Nonlinear Analysis, 2023
In this article, we study the asymptotic behaviour at infinity for viscosity solutions to a singular Monge-Ampère equation in half space from affine geometry.
Jian Huaiyu, Wang Xianduo
doaj   +1 more source

Seepage characteristics of the leaching solution during in situ leaching of uranium

open access: yesNuclear Engineering and Technology, 2023
Investigating the seepage characteristics of the leaching solution in the ore-bearing layer during the in situ leaching process can be useful for designing the process parameters for the uranium mining well.
Sheng Zeng   +6 more
doaj   +1 more source

Effects of hydration temperature, geldosage and potassium chloride dosage on the viscosity of kappa-carrageenan solution

open access: yesShipin yu jixie, 2022
Objective: To achieve accurate application of kappa-carrageenan as a gelling agent in food industries such as processed meats, dairy, desserts and jellies, as well as seamless capsule in pharmaceuticals and crushable beads in tobaccos.
LUO Chang-rong   +4 more
doaj   +1 more source

Spinning of Polysulfone Hollow Fiber Membranes Using Constant Dope Solution Composition: Viscosity Control via Temperature

open access: yesMembranes, 2022
The dope solution viscosity is an important parameter that largely determines the properties of hollow fiber membranes. In the literature available today, the change in viscosity is carried out only by changing the quantitative and/or qualitative dope ...
Dmitry Matveev   +4 more
doaj   +1 more source

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