Results 41 to 50 of about 7,825,197 (282)

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

Improvement of flatness for vector valued free boundary problems

open access: yesMathematics in Engineering, 2020
For a vectorial Bernoulli-type free boundary problem, with no sign assumption on the components, we prove that flatness of the free boundary implies C1,α regularity, as well-known in the scalar case [1, 4].
Daniela De Silva, Giorgio Tortone
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

An eigenvalue problem related to the variable exponent double-phase operator

open access: yesAIMS Mathematics
In this paper, we studied a double-phase eigenvalue problem with large variable exponents. Let $ \lambda^{1}_{(p_{n}(\cdot), \, q_{n}(\cdot))} $ be the first eigenvalues and $ u_{n} $ be the first eigenfunctions, normalized by $ \|u_{n}\|_{\mathcal{H}_{n}
Lujuan Yu, Beibei Wang, Jianwei Yang
doaj   +1 more source

A simplified stochastic optimization model for logistic dynamics with control-dependent carrying capacity

open access: yesJournal of Biological Dynamics, 2019
A simplified stochastic control model for optimization of logistic dynamics with the control-dependent carrying capacity, which is motivated by a recent algae population management problem in the river environment, is presented.
Hidekazu Yoshioka
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

On the vanishing viscosity limit in a disk

open access: yes, 2006
We say that the solution u to the Navier-Stokes equations converges to a solution v to the Euler equations in the vanishing viscosity limit if u converges to v in the energy norm uniformly over a finite time interval.
A. Laforgia   +10 more
core   +1 more source

Quadratic BSDEs with Singular Generators and Unbounded Terminal Conditions: Theory and Applications

open access: yesMathematics
We investigate a class of quadratic backward stochastic differential equations (BSDEs) with generators that are singular in y. First, we establish the existence of solutions and a comparison theorem, thereby extending the existing results in the ...
Wenbo Wang, Guangyan Jia
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

The Finite Horizon Optimal Multi-Modes Switching Problem: The Viscosity Solution Approach [PDF]

open access: yes, 2008
In this paper we show existence and uniqueness of a solution for a system of m variational partial differential inequalities with inter-connected obstacles.
Brahim El Asri, S. Hamadène
semanticscholar   +1 more source

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