Results 21 to 30 of about 19,772,092 (306)

Effective way of creation of microcracks wave impact on layer [PDF]

open access: yesСтроительство уникальных зданий и сооружений, 2013
An alternate method of enhanced oil recovery oil reservoir is a method of shock-wave stimulation. This method consists in creating a shock wave in the well. Shock wave before reaching the bottom of the wellrecognized and creates shock pulse.
Dmitry Nikolayevich Tseytin   +3 more
doaj   +2 more sources

Teaching the Analysis of Newton’s Cooling Model to Engineering Students

open access: yesInternational Journal of Engineering and Management Sciences, 2023
To apply mathematical methods to physical or other real life problem, we have to formulate the problem in mathematical terms. It means that, we have to construct the mathematical model for the problem.
Csaba Kézi
doaj   +1 more source

Physical-mathematical model of optical radiation interaction with biological tissues [PDF]

open access: yesSPIE Proceedings, 2017
The physical-mathematical model of distribution of optical radiation in biological tissues was developed. It allows determining the change of intensity of optical radiation depending on such parameters as installation angle of the sensor, biological tissue thickness and the wavelength.
Kozlovska, T. I.   +8 more
openaire   +2 more sources

Physical and mathematical model of working process of the Hartmann–Sprenger tube [PDF]

open access: yesОмский научный вестник: Серия "Авиационно-ракетное и энергетическое машиностроение", 2022
The question of the operation of the Hartmann–Sprenger tube is considered. The influence of the parameters of the incident gas flow on its parameters at the end of the dead-end cavity is investigated.
V. I. Kuznetsov, V. V. Makarov
doaj   +1 more source

A Mathematical Model of Biomass Combustion Physical and Chemical Processes

open access: yesEnergies, 2020
The numerical simulation of biomass combustion requires a model that must contain, on one hand, sub-models for biomass conversion to primary products, which involves calculations for heat transfer, biomass decomposition rate, product fractions, chemical ...
Florin Popescu   +3 more
doaj   +1 more source

Mathematical model of the electrochemical battery with physical constraints of available capacity [PDF]

open access: yesЭлектрохимическая энергетика, 2023
The article presents a universal combined model of the electrochemical battery, built on the basis of the modified Shepherd equation and the kinetic model.
Obukhov, Sergey Геннадьевич   +1 more
doaj   +1 more source

OPTIMAL MATHEMATICAL MODEL FOR DESCRIPTION OF PHYSICAL PHENOMENA AND TECHNOLOGICAL PROCESSES [PDF]

open access: yesНаучно-технический вестник информационных технологий, механики и оптики, 2018
Subject of Research. The paper presents an approach that provides a numerical calculation of the absolute uncertainty of the measured physical quantity, which is capable of quantitatively estimating the minimum achievable discrepancy between the ...
B. M. Menin
doaj   +1 more source

Application of analogous models in civil engineering [PDF]

open access: yesFacta Universitatis. Series: Architecture and Civil Engineering, 2011
The paper describes the results of making the mathematical and physical models of the authors, by using analogous methods and materials. There is the mathematical rock mass deformability model as a base for foundation engineering a concrete arch dam ...
Anđelković Vladimir   +2 more
doaj   +1 more source

Unified composite scenario for inflation and dark matter in the Nambu–Jona-Lasinio model

open access: yes, 2017
In this work, we propose a cosmological scenario inherently based on the effective Nambu–Jona-Lasinio (NJL) model that cosmic inflation and dark matter can be successfully described by a single framework.
Xiong, Chi   +3 more
core   +1 more source

Mathematical modeling of tumor growth and treatment [PDF]

open access: yes, 2014
Using mathematical models to simulate dynamic biological processes has a long history. Over the past couple of decades or so, quantitative approaches have also made their way into cancer research.
Chaplain, Mark A. J., Enderling, Heiko
core   +1 more source

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