scholarly journals Determination of Odor Intensity of Binary Gas Mixtures Using Perceptual Models and an Electronic Nose Combined with Fuzzy Logic

Sensors ◽  
2019 ◽  
Vol 19 (16) ◽  
pp. 3473 ◽  
Author(s):  
Szulczyński ◽  
Gębicki
Keyword(s):  
Fuzzy Logic ◽  
Point Of View ◽  
Odor Intensity ◽  
Gas Mixture ◽  
Electronic Noses ◽  
Practical Point ◽  
Fuzzy Logic Algorithm ◽  
Holistic Analysis ◽  
Analyze Data

Measurement and monitoring of air quality in terms of odor nuisance is an important problem. From a practical point of view, it would be most valuable to directly link the odor intensity with the results of analytical air monitoring. Such a solution is offered by electronic noses, which thanks to the possibility of holistic analysis of the gas sample, allow estimation of the odor intensity of the gas mixture. The biggest problem is the occurrence of odor interactions between the mixture components. For this reason, methods that can take into account the interaction between components of the mixture are used to analyze data from the e-nose. In the presented study, the fuzzy logic algorithm was proposed for determination of odor intensity of binary mixtures of eight odorants: n-Hexane, cyclohexane, toluene, o-xylene, trimethylamine, triethylamine, α-pinene, and β-pinene. The proposed algorithm was compared with four theoretical perceptual models: Euclidean additivity, vectorial additivity, U model, and UPL model.

Pressure and Density Dependence of the CH4 and N2 Raman Lines in an Equimolar CH4/N2 Gas Mixture

1992 ◽  
Vol 46 (3) ◽  
pp. 468-471 ◽  
Author(s):  
D. Fabre ◽  
B. Oksengorn
Keyword(s):  
Quantitative Analysis ◽  
Cross Sections ◽  
Pressure Range ◽  
Internal Field ◽  
Point Of View ◽  
Gas Mixture ◽  
Practical Point ◽  
Peak Areas ◽  
Scattering Cross Sections ◽  
Physical Quantities

Experiments have been performed to determine the variations of the peak area for the CH4 and N2 Raman lines along with their frequency shift and broadening, as a function of pressure and density, in the case of an equimolar CH4/N2 gas mixture. A comparison is made between the relative values of the Raman scattering cross sections for the two species and the values of the internal field term, versus density of the mixture, showing that the density dependences of these physical quantities become more dissimilar as density increases. Moreover, the ratio of the peak areas for the CH4 and N2 Raman lines is found to be constant in the entire pressure range used. From a practical point of view, these results for gas mixtures could be useful in quantitative analysis of fluid inclusions in rocks.

scholarly journals Proposal for the Evaluation of the Stability Level of Periodic Timetable in Terms of Operation and Infrastructure

2021 ◽  
Vol 17 (1) ◽  
pp. 25-33
Author(s):  
Lukáš Čechovič ◽  
Adrián Šperka ◽  
Jozef Gašparík
Keyword(s):  
Rail Transport ◽  
Point Of View ◽  
Passenger Transport ◽  
Railway Transport ◽  
Scientific Methods ◽  
Practical Point ◽  
Railway Networks ◽  
Transport Path ◽  
The Stability

Abstract The introduction of tact timetable in rail passenger transport is currently a new evolving trend that increases the efficiency of rail transport. This article seeks to contribute in this area of the issue and thus to raise and improve this system of organizing transport in railway transport. The aim is to propose a methodology that assesses the level of stability of tact timetable based on operational and infrastructural factors. The methodology identifies operational-infrastructural factors that affect the stability and reliability of tact timetable. Using scientific methods, it presents the method of their quantification and determination of the weights of these factors, which evaluate the line sections and transport points of the examined transport path. From a practical point of view, the methodology is generally tact applicable to other European railway networks. In the final part of the work, this methodological procedure is applied in the form of model examples for various transport path.

Determination of elastic moduli effects on storey-drifts by fuzzy logic algorithm

2009 ◽  
Vol 26 (3) ◽  
pp. 249-262 ◽  
Author(s):  
Kasim A. Korkmaz ◽  
Hamide Tekeli ◽  
Fuat Demir
Keyword(s):  
Fuzzy Logic ◽  
Elastic Moduli ◽  
Fuzzy Logic Algorithm

scholarly journals Determination of Ranges of Components of Heat Affected Zone Including Changes of Structure / Określenie Zakresów Składowych Strefy Wpływu Ciepła Uwzględniając Zmiany Struktury

2015 ◽  
Vol 60 (4) ◽  
pp. 2607-2612 ◽  
Author(s):  
Z. Śloderbach ◽  
J. Pająk
Keyword(s):  
Creep Strength ◽  
Thermal Fatigue ◽  
Heat Affected Zone ◽  
Analytical Method ◽  
Structural Changes ◽  
Point Of View ◽  
Practical Point ◽  
Fine Grained ◽  
Welding Technology

A simplified analytical method to determine the range of the heat affected zone and its components during welding is presented. Heat affected zone (HAZ) is an area formed during welding in which, as the result of temperature, some structural changes in the welded material occured. Knowledge of the area and sub-areas of HA Z is important from practical point of view, since the area of the fine-grained HAZ is a critical place in terms of creep strength and thermal fatigue. Heat affected zone is often the cause of future damage of many devices in which welding technology was used for their repair.

An Approaching on Fuzzy Logic Application for Typical Parts Manufacturing

2013 ◽  
Vol 371 ◽  
pp. 913-917
Author(s):  
Cristian Turc ◽  
Felicia Veronica Banciu ◽  
Eugen Pămîntaş
Keyword(s):  
Fuzzy Logic ◽  
Point Of View ◽  
General Point ◽  
Work Piece ◽  
Production Volume ◽  
Manufacturing Method ◽  
Fuzzy Logic Algorithm ◽  
Parts Manufacturing ◽  
The Given ◽  
Production Conditions

The paper presents a fuzzy logic based algorithm for the choosing of the gearbox housing work piece in some production conditions. In many cases this problem is solved empirically, based on the experience of the manufacturer. The present work uses the so-called rating of suitability of a part for a certain manufacturing method. It consists of the formalization of the knowledge regarding the production conditions (production volume, loading conditions) using fuzzy sets and then the work piece choosing decision through the comparison between the ratings of suitability of the given part for the considered manufacturing methods that can be used to obtain the given work piece (steel welded, cast iron and aluminum). In order to obtain a general point of view regarding the suitability rate for a specific set of production conditions, a fuzzy logic MATLAB® toolbox was adapted. The described fuzzy logic algorithm allows a rapid, argued choosing of the work piece type in the production of gearbox housings.

scholarly journals Strengths and weaknesses of the logistic function used in forecasting

2021 ◽  
Author(s):  
THEODORE MODIS
Keyword(s):  
Growth Cycle ◽  
Logistic Function ◽  
Point Of View ◽  
Time Data ◽  
Practical Point ◽  
Four Seasons

This work describes strengths and weaknesses of the logistic function used in forecasting from a theoretical and a practical point of view. Theoretical topics treated are: generalizing the concept of competition, dividing the growth cycle in four "seasons", and using logistics simply qualitatively to obtain rare insights and intuitive understanding. Practical topics addresses are: determination of the uncertainties, how to decide whether to fit cumulative or per unit of time data, and how to deal with a bias toward a low ceiling.

Distribution optimization of electric vehicle load space based on interval type-ii fuzzy logic algorithm

2021 ◽  
pp. 1-6
Author(s):  
Zhongwei Zhang
Keyword(s):  
Fuzzy Logic ◽  
Electric Vehicle ◽  
Large Scale ◽  
Point Of View ◽  
Type Ii ◽  
Fuzzy Logic Algorithm ◽  
Electric Vehicle Charging ◽  
Space Allocation ◽  
Load Increase ◽  
Interval Type

The disorderly charging behavior of a mobile compound, large-scale electric vehicles in time and space will not only cause the phenomenon of “compound the peak” of the electric load, increase of the peak-valley difference of the grid, and may cause partial overcharge and line congestion and other issues. Relying on the Interval Type-II fuzzy logic algorithm, the two optimization algorithm of interval type 2 fuzzy logic algorithm and genetic algorithm are compared from the space point of view, based on the research on the optimization problem of electric vehicle charging load space allocation, through the results of calculation examples in this paper. Practical results have verified the effectiveness and feasibility of the algorithm, and the interval two fuzzy logic algorithm has high practicability.

scholarly journals Some Peculiarities of the Process of Preparing the Zeolites Containing Breeds in a Ball Mill

2019 ◽  
Vol 8 (4) ◽  
pp. 7695-7698
Keyword(s):  
Energy Consumption ◽  
Ball Mill ◽  
Point Of View ◽  
Specific Productivity ◽  
Grinding Process ◽  
Ball Mills ◽  
Practical Point ◽  
Grinding Conditions

The article presents the results of studies of grindability of zeolite-containing rocks in ball mills with different grinding conditions. The results of studies of grindability of zeolite-containing rocks, optimization of the grinding process and determination of the specific productivity of industrial mills are presented. From a practical point of view, the data obtained can reduce the energy consumption of the grinding process of zeolite-containing rocks and increase the values of equipment efficiency and improve the quality of the finished product.

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