Discrete mathematical model of chest thickness using kernel function for optimum kVp and mAs of computed radiography

2012 ◽  
Author(s):  
Sudarath Suntaropas Surapun Yimman ◽  
Rodjarin Boontawan Kobchai Dejhan
Keyword(s):  
Mathematical Model ◽  
Kernel Function ◽  
Computed Radiography ◽  
Discrete Mathematical Model

Two-dimensional discrete mathematical model of tumor-induced angiogenesis

2009 ◽  
Vol 30 (4) ◽  
pp. 455-462
Author(s):  
Gai-ping Zhao ◽  
Er-yun Chen ◽  
Jie Wu ◽  
Shi-xiong Xu ◽  
M. W. Collins ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Two Dimensional ◽  
Discrete Mathematical Model

Optimal Liquidation Strategy Based on Stochastic and Nonlinear Price Impact and Particle Swarm Optimization

2012 ◽  
Vol 452-453 ◽  
pp. 607-612
Author(s):  
Fei Huang ◽  
Jia He Cao
Keyword(s):  
Mathematical Model ◽  
Nonlinear Function ◽  
Liquidity Risk ◽  
Concave Function ◽  
Institutional Investor ◽  
Price Impact ◽  
Swarm Optimization ◽  
Optimal Liquidation ◽  
Horizon Line ◽  
Discrete Mathematical Model

The institutional investor selling a large block of shares in the market usually faces with liquidity risk declining the stock’s prices. In the paper, supposing that temporary impact is stochastic and nonlinear function of trading velocity, we establishes the discrete mathematical model and uses PSO to obtain the optimal liquidation strategies of risk aversion, which is a strict concave function. When analyzing the sensitivity of the parameters, we find that the curve becomes higher and steeper with the increase of the parameters or the decrease of , .As the parameter is tremendous, the curve is close to a horizon line.

scholarly journals SIR Mathematical Model of Convalescent Plasma Transfusion Applied to the COVID-19 Pandemic Data in Indonesia to Control the Spread of the Disease

2021 ◽  
Vol 2084 (1) ◽  
pp. 012022
Author(s):  
Hennie Husniah ◽  
Ruhanda ◽  
Asep Kuswandi Supriatna
Keyword(s):  
Mathematical Model ◽  
Infectious Diseases ◽  
Disease Transmission ◽  
Emerging Infectious Diseases ◽  
Mortality Rates ◽  
Sir Model ◽  
Difficult Problem ◽  
Plasma Transfusion ◽  
Preventive Actions ◽  
Discrete Mathematical Model

Abstract In this paper we develop a mathematical model of disease transmission dynamics. Although some vaccines for some infectious diseases are available, there are some cases where handling new emerging infectious diseases, such as COVID-19 pandemic, is still a difficult problem to handle. Preventive actions, such as wearing masks, distance guarding, frequent hand washing, and others are still the most important interventions in handling the transmission of this disease. Recently, several countries have allowed the use of convalescent plasma transfusion (CPT) in the management of moderate and severe COVID-19 patients. Several early studies of this use have yielded prospective results with reduced mortality rates. A recent work also shows that using a simple discrete mathematical model of CPT could reduce the outbreak of disease transmission, in the sense of reducing the peak number of active cases and the length of the outbreak itself. In this paper, we use a continuous SIR model applied to COVID-19 pandemic data in Indonesia to address an important question whether convalescent plasma transfusion may reduce the transmission of the disease.

Discrete Mathematical Model of Earthquake Focus: An Introduction

2020 ◽  
Vol 177 (9) ◽  
pp. 4097-4118
Author(s):  
Sergey A. Arsen’yev ◽  
Lev V. Eppelbaum ◽  
Tatiana B. Meirova
Keyword(s):  
Mathematical Model ◽  
Earthquake Focus ◽  
Discrete Mathematical Model

scholarly journals A discrete mathematical model for the aggregation of β-Amyloid

PLoS ONE ◽  
2018 ◽  
Vol 13 (5) ◽  
pp. e0196402 ◽  
Author(s):  
Maher A. Dayeh ◽  
George Livadiotis ◽  
Saber Elaydi
Keyword(s):  
Mathematical Model ◽  
Β Amyloid ◽  
Discrete Mathematical Model
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