scholarly journals THE FIVE PARAMETER LOGISTIC (5PL) FUNCTION AND COVID-19 EPIDEMIC IN ICELAND

2021 ◽  
Author(s):  
Pinaki Pal
Keyword(s):  
Mathematical Model ◽  
Regression Analysis ◽  
Linear Regression ◽  
Linear Regression Analysis ◽  
Cumulative Number ◽  
Simple Mathematical Model ◽  
Non Linear ◽  
The Mathematical Model ◽  
Epidemiological Parameters

Right now, investigations are rigorously carried out on modeling the dynamic progress of (Covid-19) pandemic around the globe. Here we introduce a simple mathematical model for analyzing the dynamics of the Covid-19, considering only the number of cumulative cases. In the present work, the 5PL function is applied to study the Covid-19 spread in Iceland. The cumulative number of infected persons C(t) has been accurately fitted with the 5PL equation, giving rise to different epidemiological parameters. The result of the current examination reveals the effectiveness and efficacy of the 5PL function for exploring the Covid 19 dynamics in Iceland. The mathematical model is simple enough such that practitioners knowing algebra and non-linear regression analysis can employ it to examining the pandemic situation in different countries.

Optimising the Production of Combined Filter/Sorption Composite Materials

2017 ◽  
Vol 44 (9) ◽  
pp. 51-58
Author(s):  
A.V. Genis ◽  
A.V. Kuznetsov ◽  
G.M. Il'yutkina ◽  
L.V. Polyakov
Keyword(s):  
Regression Analysis ◽  
Composite Materials ◽  
Linear Regression ◽  
Protective Clothing ◽  
Linear Regression Analysis ◽  
Physicomechanical Properties ◽  
Single Stage ◽  
Service Properties ◽  
Non Linear ◽  
Bonding Technology

The main relationships governing the production of combined filter/sorption materials by plying-up with the application of adhesive melts have been studied. It has been established that the use of single-stage bonding technology makes it possible to improve the physical and physicomechanical properties of multilayer non-woven mats. The possibility of optimising the plying-up process by using multiple non-linear regression analysis has been demonstrated. Materials with service properties suitable for use in protective clothing have been obtained.

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