COMPUTER SIMULATION METHODS IN SOLVING THE PROBLEMS OF ANCIENT DEMOGRAPHY

2020 ◽  
Author(s):  
Андрей Геннадьевич Орлов ◽  
Ирина Анатольевна Галяс
Keyword(s):  
Computer Simulation ◽  
Computer Model ◽  
Simulation Methods

Рассматриваются фундаментальные проблемы в изучении античной демографии, предлагается концепция и модель компьютерного моделирования для их преодоления. This article examines fundamental problems in the study of ancient demography and proposes computer model to overcome them.

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.

Managing uncertainty in a general insurance company

1990 ◽  
Vol 117 (2) ◽  
pp. 173-277 ◽  
Author(s):  
C. D. Daykin ◽  
G. B. Hey
Keyword(s):  
Computer Model ◽  
Flow Model ◽  
Insurance Companies ◽  
Simulation Methods ◽  
Insurance Company ◽  
Practical Applications ◽  
General Insurance ◽  
Alternative Approaches ◽  
The Impact

AbstractA cash flow model is proposed as a way of analysing uncertainty in the future development of a general insurance company. The company is modelled alongside the market in aggregate so that the impact of changes in premium rates relative to the market can be assessed. An extensive computer model is developed along these lines, intended for use in practical applications by actuaries advising the management of genera1 insurance companies. Simulation methods are used to explore the consequences of uncertainty, particularly in regard to inflation and investments. Some comments are made on the role of actuaries in general insurance. Alternative approaches to describing the behaviour of an insurance firm in the market are considered.

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.

scholarly journals Computer simulation methods of redundant measurements with the nonlinear transformation function

2019 ◽  
Vol 2 (5 (98)) ◽  
pp. 16-22
Author(s):  
Volodymyr Shcherban ◽  
Ganna Korogod ◽  
Vitaliy Chaban ◽  
Oksana Kolysko ◽  
Yury Shcherban’ ◽  
...  
Keyword(s):  
Computer Simulation ◽  
Transformation Function ◽  
Nonlinear Transformation ◽  
Simulation Methods

Hands-on versus computer simulation methods in chemistry

1987 ◽  
Vol 64 (3) ◽  
pp. 232 ◽  
Author(s):  
Donald R. Bourque ◽  
Gaylen R. Carlson
Keyword(s):  
Computer Simulation ◽  
Simulation Methods ◽  
Hands On

Examining Coordination in Disaster Response Using Simulation Methods

2015 ◽  
Vol 12 (4) ◽  
pp. 891-914 ◽  
Author(s):  
Xuesong Guo ◽  
Naim Kapucu
Keyword(s):  
Computer Simulation ◽  
Performance Assessment ◽  
Petri Net ◽  
Disaster Response ◽  
Process Analysis ◽  
Critical Factor ◽  
System Optimization ◽  
Simulation Methods ◽  
Average Delay ◽  
Disaster Exercise

Abstract Purpose of the research is to examine coordination in disaster response by computer simulation using Petri net. We addressed issues on coordination in disaster response by focusing on interorganizational processes. Defining the processes according to disaster exercise, we developed the model based on Stochastic Petri Net. Index items, including average delay time and busyness probability, were introduced to facilitate discussion. Simulation demonstrated utilization of process analysis in performance assessment of collaborative disaster response. Since fragmentation is critical factor hindering efficient response, its remedy or elimination should be focused for system optimization.

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