scholarly journals METHOD OF MATHEMATICAL MODELING OF THE PROCESSOR-MEMORY SUBSYSTEM BASED ON QUEUING SYSTEMS WITH RELATIVE PRIORITIES

2021 ◽  
pp. 68-74
Author(s):  
A.I. Martyshkin ◽  
D.S. Martens-Atyushev
Keyword(s):  
Mathematical Modeling ◽  
Queuing Systems ◽  
Memory Subsystem

scholarly journals Mathematical Modeling in Heavy Traffic Queuing Systems

2014 ◽  
Vol 04 (06) ◽  
pp. 340-350 ◽  
Author(s):  
Sulaiman Sani ◽  
Onkabetse A. Daman
Keyword(s):  
Mathematical Modeling ◽  
Heavy Traffic ◽  
Queuing Systems

scholarly journals Economic and Mathematical Modeling of the Quality of Services Provided by the Urban Passenger Transport Infrastructure Us-ing Nonfinancial Indicators

2018 ◽  
Vol 7 (4.38) ◽  
pp. 452
Author(s):  
Vladimir Sekerin ◽  
Mikhail Dudin ◽  
Dmitri Shevchenko ◽  
Konstantin Zadornov ◽  
Diana Maleeva
Keyword(s):  
Mathematical Modeling ◽  
Mathematical Model ◽  
Transport Infrastructure ◽  
Quality Of Services ◽  
Financial Indicators ◽  
Queuing Systems ◽  
Passenger Transport ◽  
Passenger Transportation ◽  
Main Factors

The article reviews the issues of justifying the expediency of using financial indicators to assess the quality of passenger transportation and identification of the main factors that influence the quality of transportation. An economic and mathematical model of the passenger transportation quality using nonfinancial indicators was developed in the study.It was proposed to use a mathematical toolkit of the theory of queuing systems (QS) to study the operation of the route of the urban passenger transport system (UPTS).  

Cerebral Blood Circulation in Premature Infants by Means of Mathematical Modeling

2015 ◽  
Vol 46 (S 01) ◽  
Author(s):  
R. Lampe ◽  
N. Botkin ◽  
V. Turova ◽  
T. Blumenstein ◽  
A. Alves-Pinto
Keyword(s):  
Mathematical Modeling ◽  
Premature Infants ◽  
Blood Circulation ◽  
Cerebral Blood Circulation

MODELING THE HYDRAULIC CHARACTERISTICS OF DRAIN VALVE AND BURST FITTING OF AN AIRCRAFT ACCIDENT-RESISTANT FUEL SYSTEM

2020 ◽  
Vol 7 (3) ◽  
pp. 37-44
Author(s):  
KONSTANTIN NAPREENKO ◽  
◽  
ROMAN SAVELEV ◽  
ALEKSEY TROFIMOV ◽  
ANNA LAMTYUGINA ◽  
...  
Keyword(s):  
Mathematical Modeling ◽  
Hydraulic Resistance ◽  
Hydraulic Calculation ◽  
Fuel System ◽  
Hydraulic Characteristics ◽  
System A ◽  
Ansys Cfx ◽  
Calculation Results ◽  
Scale Experiment ◽  
Aircraft Accident

The article discusses methods for determining the hydraulic resistance of units of an accident-resistant fuel system. A detailed description of the need to create such fuel systems for modern helicopters is given. The development of such systems today is impossible without the use of the method of mathematical modeling, which allows to qualitatively solve problems arising in the design process. To obtain accurate research results, it is necessary to have a complete description of all elements and assemblies of the system. Methods for determining the hydraulic characteristics of AFS elements using the drag coefficient, reference literature and CFD codes are considered. As the investigated AFS units, a drain valve and burst fitting were studied in the article. A hydraulic calculation of these AFS elements ware performed, the simulation results are presented in the ANSYS CFX software package. Also as the calculation results of bursting fitting, the pressure distribution fields of full and static pressure, velocity and streamlines are also shown. An experimental setup for validating the results obtained using the mathematical modeling method is considered, as well as a methodology for conducting a full-scale experiment to determine the hydraulic resistance of the unit. Materials have been prepared for inclusion in a one-dimensional mathematical model of an accident-resistant fuel system.

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