scholarly journals Equivalent reliability polynomials modeling EAS and their geometries

2015 ◽  
Vol 53 (1) ◽  
pp. 177-195 ◽  
Author(s):  
Zahir Abdul Haddi Hassan ◽  
Constantin Udriște
Keyword(s):  
Graph Theory ◽  
Reliability Analysis ◽  
Geometric Modeling ◽  
Intrinsic Properties ◽  
Matlab Software ◽  
Reliability Models ◽  
Algebraic Hypersurfaces ◽  
Theory Technique ◽  
Made In

AbstractIn this paper we shall introduce two equivalent techniques in order to evaluate reliability analysis of electrical aircrafts systems (EAS): (i) graph theory technique, and (ii) simplifying diffeomorphism technique. Geometric modeling of reliability models is based on algebraic hypersurfaces, whose intrinsic properties are able to select those models which are relevant for applications. The basic idea is to cover the reliability hypersurfaces by exponentially decay curves. Most of the calculations made in this paper have used Maple and Matlab software.

CORRECTION OF PREDICTION MODEL OUTPUT–APPLICATION TO GENERAL CORROSION MODEL

2021 ◽  
Vol 156 (A4) ◽  
Author(s):  
N Hifi ◽  
N Barltrop
Keyword(s):  
Prediction Model ◽  
Reliability Analysis ◽  
Model Calibration ◽  
Structural Reliability ◽  
Prediction Models ◽  
General Corrosion ◽  
Model Output ◽  
Reliability Models ◽  
Corrosion Model ◽  
Recorded Data

This paper applies a newly developed methodology to calibrate the corrosion model within a structural reliability analysis. The methodology combines data from experience (measurements and expert judgment) and prediction models to adjust the structural reliability models. Two corrosion models published in the literature have been used to demonstrate the technique used for the model calibration. One model is used as a prediction for a future degradation and a second one to represent the inspection recorded data. The results of the calibration process are presented and discussed.

scholarly journals Studies on enzyme action. V.—Hydrolysis of isomeric glucosides and galactosides by acids and enzymes.

1905 ◽  
Vol 74 (497-506) ◽  
pp. 188-194 ◽  
Author(s):  
Edward Frankland Armstrong ◽  
Henry Edward Armstrong
Keyword(s):  
Relative Stability ◽  
Intrinsic Properties ◽  
Enzyme Action ◽  
Test Materials ◽  
Hydrolysis Of ◽  
Made In

In view of the use constantly made, in contrasting the action of sucroclastic enzymes, of the stereoisomeric α- and β-methyl glucosides and the corresponding galactosides as test materials, it was desirable to gain some idea of the relative stability of these four compounds in presence of acids and wherever possible towards enzymes, a know­ledge of their behaviour being of importance, both as throwing light on their intrinsic properties and for the purpose of correlating the activities of the various compounds amenable to hydrolysis.

scholarly journals Erdos – Renyi Random Graph and Machine Learning Based Botnet Detection

2020 ◽  
Vol 9 (5) ◽  
pp. 1037-1040
Keyword(s):  
Machine Learning ◽  
Probability Theory ◽  
Graph Theory ◽  
Complex Network ◽  
Random Graphs ◽  
Connected Graph ◽  
Free Graph ◽  
Botnet Detection ◽  
Scale Free ◽  
Made In

Basically large networks are prone to attacks by bots and lead to complexity. When the complexity occurs then it is difficult to overcome the vulnerability in the network connections. In such a case, the complex network could be dealt with the help of probability theory and graph theory concepts like Erdos – Renyi random graphs, Scale free graph, highly connected graph sequences and so on. In this paper, Botnet detection using Erdos – Renyi random graphs whose patterns are recognized as the number of connections that the vertices and edges made in the network is proposed. This paper also presents the botnet detection concepts based on machine learning.

scholarly journals Comparative Modelling and Thermal Analysis of AlGaN/GaN Power Devices

2021 ◽  
Vol 11 (3) ◽  
pp. 33
Author(s):  
Mahesh B. Manandhar ◽  
Mohammad A. Matin
Keyword(s):  
Gallium Nitride ◽  
Aluminum Gallium Nitride ◽  
Electrical Performance ◽  
Operating Voltage ◽  
Intrinsic Properties ◽  
Power Devices ◽  
Power Switching ◽  
Power Modules ◽  
Wideband Gap ◽  
Made In

The use of Aluminum Gallium Nitride (AlGaN) as a power switching device material has been a promising topic of research in recent years. Along with Silicon Carbide (SiC) and Gallium Nitride (GaN), AlGaN is categorized as a Wideband Gap (WBG) material with intrinsic properties best suited for high power switching applications. This paper simulates and compares the thermal and electrical performance of AlGaN and Silicon (Si) MOSFETs, modeled in COMSOL Multiphysics. Comparisons between similar AlGaN/GaN and Si power modules are made in terms of heatsink requirements. The temperatures for the same operating voltage are found to be significantly lower for the AlGaN MOSFETs structures, compared to Si. The heatsink size for the AlGaN/GaN is found to be smaller compared to Si for the power modules.

Reliability Analysis of Cold Standby Compound System

2014 ◽  
Vol 945-949 ◽  
pp. 1116-1119
Author(s):  
Jiang Jun Xu ◽  
Zhi Jian Xiao
Keyword(s):  
Laplace Transform ◽  
Reliability Analysis ◽  
Mathematical Expression ◽  
Reliability Function ◽  
Compound System ◽  
Laplace Transform Method ◽  
Transform Method ◽  
Matlab Software ◽  
Cold Standby

for researching standby Compound system,the authors propose a new Laplace transform method which are used for deducing mathematical expression of system reliable lifetime 。The reliability function is simulated with MATLAB software and analyed,The results show that this method is not only effective but also simple and practical.

Sign in / Sign up

Export Citation Format

Share Document