COMPUTER SIMULATION OF THE ELECTROMAGNETIC FIELD ON URBAN RADIO ROUTES WITH A MOBILE COMMUNICATION POINT

2021 ◽  
Author(s):  
В.М. ГАВРИЛОВ ◽  
Н.Н. КОРНЕЕВА
Keyword(s):  
Computer Simulation ◽  
Electromagnetic Field ◽  
Urban Area ◽  
Field Distribution ◽  
Computer Model ◽  
Mobile Communication ◽  
Radio Channel ◽  
Electrodynamic Calculation

Приведены результаты выполненного с помощью программы FEKO [1-3] электродинамического расчета распределения поля в зоне городской застройки, представленной трехмерной компьютерной моделью. Проведена оценка интенсивности электромагнитного поля в радиоканале с подвижным пунктом связи на затененных и закрытых трассах. The results of the electrodynamic calculation of the field distribution in the urban area, represented by a threedimensional computer model, performed using the software FEKO, are presented. The intensity of the electromagnetic field in a radio channel with a mobile communication point on shaded and closed routes is estimated.

Submerged upflow biotower operation and computer simulation

1994 ◽  
Vol 30 (11) ◽  
pp. 143-146
Author(s):  
Ronald D. Neufeld ◽  
Christopher A. Badali ◽  
Dennis Powers ◽  
Christopher Carson
Keyword(s):  
Computer Simulation ◽  
Benzoic Acid ◽  
Computer Model ◽  
Rate Constants ◽  
Batch Mode ◽  
Operational Conditions ◽  
First Order ◽  
Low Concentrations ◽  
Biological Transformation ◽  
Kinetics Of

A two step operation is proposed for the biodegradation of low concentrations (< 10 mg/L) of BETX substances in an up flow submerged biotower configuration. Step 1 involves growth of a lush biofilm using benzoic acid in a batch mode. Step 2 involves a longer term biological transformation of BETX. Kinetics of biotransformations are modeled using first order assumptions, with rate constants being a function of benzoic acid dosages used in Step 1. A calibrated computer model is developed and presented to predict the degree of transformation and biomass level throughout the tower under a variety of inlet and design operational conditions.

COMPUTER SIMULATION OF PROCESSES IN A DAMPED CURRENT GENERATOR

2020 ◽  
Author(s):  
A.P Sinegubov ◽  
◽  
V.A. Shelest ◽  
D.A. Kopeikin
Keyword(s):  
Computer Simulation ◽  
Computer Model ◽  
Current Generator ◽  
Mos Transistor

The article considers a damped current generator based on a MOS transistor. In the LTspice IV package, a computer model of the generator is being developed, which allows to study its operation and refine the circuit parameters.

scholarly journals Facial pressure zones of an oronasal interface for noninvasive ventilation: a computer model analysis

2014 ◽  
Vol 40 (6) ◽  
pp. 652-657 ◽  
Author(s):  
Luana Souto Barros ◽  
Pedro Talaia ◽  
Marta Drummond ◽  
Renato Natal-Jorge
Keyword(s):  
Computer Simulation ◽  
Skin Lesion ◽  
Computer Model ◽  
Noninvasive Ventilation ◽  
Laser Scanning ◽  
Soft Tissues ◽  
Geometric Model ◽  
Human Face ◽  
Nasal Bridge ◽  
Nasal Cartilage

OBJECTIVE: To study the effects of an oronasal interface (OI) for noninvasive ventilation, using a three-dimensional (3D) computational model with the ability to simulate and evaluate the main pressure zones (PZs) of the OI on the human face. METHODS: We used a 3D digital model of the human face, based on a pre-established geometric model. The model simulated soft tissues, skull, and nasal cartilage. The geometric model was obtained by 3D laser scanning and post-processed for use in the model created, with the objective of separating the cushion from the frame. A computer simulation was performed to determine the pressure required in order to create the facial PZs. We obtained descriptive graphical images of the PZs and their intensity. RESULTS: For the graphical analyses of each face-OI model pair and their respective evaluations, we ran 21 simulations. The computer model identified several high-impact PZs in the nasal bridge and paranasal regions. The variation in soft tissue depth had a direct impact on the amount of pressure applied (438-724 cmH2O). CONCLUSIONS: The computer simulation results indicate that, in patients submitted to noninvasive ventilation with an OI, the probability of skin lesion is higher in the nasal bridge and paranasal regions. This methodology could increase the applicability of biomechanical research on noninvasive ventilation interfaces, providing the information needed in order to choose the interface that best minimizes the risk of skin lesion.

Sign in / Sign up

Export Citation Format

Share Document