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Interval Type-2 Fuzzy Logic Control of m.bile Robots

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Journal of Intelligent Learning System. and Applications 2012年第4期4卷 291-302页

作者： Nesrine Baklouti Robert John adel m. alimi Centre for Com.utational Intelligence De Montfort University Leicester UK. REGIm. Research Group on Intelligent m.chines National Engineering School of Sfax (ENIS) Sfax Tunisia

Navigation of autonom.us m.bile robots in dynam.c and unknown environm.nts needs to take into account different kinds of uncertainties. Type-1 fuzzy logic research has been largely used in the control of m.bile robots. However, type-1 fuzzy control presents lim.tations in handling those uncertainties as it uses precise fuzzy sets. Indeed type-1 fuzzy sets cannot deal with linguistic and num.rical uncertainties associated with either the m.chanical aspect of robots, or with dynam.c changing environm.nt or with knowledge used in the phase of conception of a fuzzy system. Recently m.ny researchers have applied type-2 fuzzy logic to im.rove perform.nce. As control using type-2 fuzzy sets represents a new generation of fuzzy controllers in m.bile robotic issue, it is interesting to present the perform.nces that can offer type-2 fuzzy sets by regards to type-1 fuzzy sets. The paper presented deep and new com.arisons between the two sides of fuzzy logic and dem.nstrated the great interest in controlling m.bile robot using type-2 fuzzy logic. We deal with the design of new controllers for m.bile robots using type-2 fuzzy logic in the navigation process in unknown and dynam.c environm.nts. The dynam.city of the environm.nt is depicted by the presence of other dynam.c robots. The perform.nces of the proposed controllers are represented by both sim.lations and experim.ntal results, and discussed over graphical paths and num.rical analysis.

关键词： Type-2 Fuzzy Logic Control m.tion Planning m.bile Robots

Genetic Algorithm. for Perceptual Codes Extraction

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Journal of Intelligent Learning System. and Applications 2012年第4期4卷 255-265页

作者： m.hm.ud Ltaief Sourour Njah Hala Bezine adel m. alimi National School of Engineers The University of Sfax Sfax Tunisia National School of Engineers The University of Sfax Sfax Tunisia.

In this work a new technique for global perceptual codes (GPCs) extraction using genetic algorithm. (GA) is presented. GAs are em.loyed to extract the GPCs in order to reduce the original num.er of features and to provide m.aningful representations of the original data. In this technique the GPCs are build from.a certain com.ination of elem.ntary perceptual codes (EPCs) which are provided by the Beta-elliptic m.del for the generation of com.lex handwriting m.vem.nts. Indeed, in this m.del each script is m.delled by a set of elliptic arcs. We associate to each arc an EPC. In the proposed technique we defined four types of EPCs. The GPCs can be form.d by m.ny possible com.inations of EPCs depending on their num.er and types. So that, the problem.of choosing the right com.ination for each GPC can be regarded as a global optim.zation problem.which is treated in this work using the GAs. Several sim.lation exam.les are presented to evaluate the interest and the efficiency of the proposed technique.

关键词： Online Handwriting Beta-Elliptic m.del Elem.ntary Perceptual Codes Global Perceptual Codes Genetic Algorithm.

Autom.tic Detection of COVID-19 Using a Stacked Denoising Convolutional Autoencoder

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Com.uters, m.terials & Continua 2021年第12期69卷 3259-3274页

作者： Habib Dhahri Besm. Rabhi Slaheddine Chelbi Om.r Alm.tiry Awais m.hm.od adel m.alimi College of Applied Com.uter Sciences(CACS) King Saud UniversityRiyadh11543Saudi Arabia Faculty of Sciences and Technology of Sidi Bouzid University of KairouanKairouanTunisia National School of Engineers(ENIS) University of SfaxTunisia Departm.nt of Com.uter Sciences College of Sciences and Arts in UnaizahQassim UniversityAl-QassimKingdom of Saudi Arabia

The exponential increase in new coronavirus disease 2019(COVID-19)cases and deaths has m.de COVID-19 the leading cause of death in m.ny ***,in this study,we propose an efficient technique for the autom.tic detection of COVID-19 and pneum.nia based on X-ray im.ges.A stacked denoising convolutional autoencoder(SDCA)m.del was proposed to classify X-ray im.ges into three classes:norm.l,pneum.nia,and *** SDCA m.del was used to obtain a good representation of the input data and extract the relevant features from.noisy *** proposed m.del’s architecture m.inly com.osed of eight autoencoders,which were fed to two dense layers and Softm.x *** proposed m.del was evaluated with 6356 im.ges from.the datasets from.different *** experim.nts and evaluation of the proposed m.del were applied to an 80/20 training/validation split and for five cross-validation data splitting,*** m.trics used for the SDCA m.del were the classification accuracy,precision,sensitivity,and specificity for both *** results dem.nstrated the superiority of the proposed m.del in classifying X-ray im.ges with high accuracy of 96.8%.Therefore,this m.del can help physicians accelerate COVID-19 diagnosis.

关键词： Stacked autoencoder augm.ntation m.lticlassification COVID-19 convolutional neural network

m.soporous WO_3-graphene photocatalyst for photocatalytic degradation of m.thylene Blue dye under visible light illum.nation

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Journal of Environm.ntal Sciences 2018年第4期30卷 328-337页

作者： adel A.Ism.il m.Faisal adel Al-Haddad Wastewater Treatm.nt and Reclam.tion Technologies (WTRT) Water Research Center Kuwait Institute for Scientific Research Advanced m.terials and Nano-Research Centre Najran University

Advanced oxidation technologies are a friendly environm.ntal approach for the rem.diation of industrial wastewaters. Here, one pot synthesis of m.soporous WO3 and WO3-graphene oxide（GO） nanocom.osites has been perform.d through the sol–gel m.thod. Then, platinum.Pt） nanoparticles were deposited onto the WO3 and WO3-GO nanocom.osite through photochem.cal reduction to produce m.soporous Pt/WO3 and Pt/WO3-GO nanocom.osites. X-ray diffraction（XRD） findings exhibit a form.tion of m.noclinic and triclinic WO3 phases. Transm.ssion Electron m.croscope（TEm. im.ges of Pt/WO3-GO nanocom.osites exhibited that WO3 nanoparticles are obviously agglom.rated and the particle sizes of Pt and WO3 are ~ 10 nm.and 20–50 nm. respectively. The m.soporous Pt/WO3 and Pt/WO3-GO nanocom.osites were assessed for photocatalytic degradation of m.thylene Blue（m.） as a probe m.lecule under visible light *** findings showed that m.soporous Pt/WO3, WO3-GO and Pt/WO3-GO nanocom.osites exhibited m.ch higher photocatalytic efficiencies than the pure WO3. The photodegradation rates by m.soporous Pt/WO3-GO nanocom.osites are 3, 2 and 1.15 tim.s greater than those by m.soporous WO3, WO3-GO, and Pt/WO3, respectively. The key factors of the enhanced photocatalytic perform.nce of Pt/WO3-GO nanocom.osites could be explained by the highly freedom.electron transfer through the synergetic effect between WO3 and GO sheets, in addition to the Pt nanoparticles that act as active sites for O2 reduction, which suppresses the electron hole pair recom.ination in the Pt/WO3-GO nanocom.osites.

关键词： m.soporous Pt/WO3 nanocom.osites Graphene oxide m.thylene Blue photodegradation Visible light

Service life prediction of AP/Al/HTPB solid rocket propellant with consideration of softening aging behavior

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Chinese Journal of Aeronautics 2019年第2期32卷 361-368页

作者： Walid m.adel Guozhu LIANG School of Astronautics Beihang University

The aging behavior of softening com.osite solid propellant was investigated by m.asuring its m.chanical and ballistic prosperities during prolonged storage at elevated and room.tem.eratures. Accelerated aging was conducted at 65 °C for 231 days while the norm.l aging was perform.d at 25 ± 3 °C and relative hum.dity less than 50% for 8 years. The m.chanical properties were obtained from.uniaxial tensile tests for the aged propellant specim.ns while the ballistic properties were determ.ned from.static firing tests of subscale m.tors aged for 112 days at 65 °C. The m.chanical results show that the m.xim.m.tensile strength and Young's m.dulus initially increase and subsequently decrease with increasing aging tim., while the m.xim.m.tensile strain generally increases with increasing aging tim.. The ballistic properties like burning rate show a sm.ll change which cannot affect the ballistic perform.nce. The experim.ntal results show that the changes in the m.chanical properties are significant during the aging period, but the burning rate does not undergo significant changes. From.this study, it is observed that the propellant ages through a com.ination of reactions like post-cure, oxidative cross-linking, chain scission, and hydrolysis. The chain scission and the hydrolysis effect are the m.st significant process, which m.kes the propellant soft and extendible. The observed aging m.chanism.has been m.deled using an exponential function with two term. which can describe the com.lex behavior of the aging. By applying Arrhenius equation,the activation energy values were obtained based on the propellant m.chanical properties. The shelf life of this propellant form.lation at 25 °C is predicted to be 13 years using the m.dulus as failure criteria and control param.ter.

关键词： Aging Hydrolysis Service life Softening behavior Solid propellant

Learning System.for Standing Hum.n Detection

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Learning System for Standing Human Detection

Developed m.them.tical technique for fractional stochastic point kinetics m.del in nuclear reactor dynam.cs

2011 IEEE International Conference on Com.uter Science and Autom.tion Engineering(CSAE 2011)

作者： Boudour Am.ar Nizar Rokbani adel m.alimi REGIm.REsearch Group on Intelligent m.chines） University of SfaxNational Engineering School of Sfax（ENIS）

The hum.n detection is a key functionality to reach Hum.n Com.uter and Robot *** hum.n tracking is also a rapidly evolving area in com.uter and robot vision;it aim. to explore and to follow hum.n *** present in this article an intelligent system.to learn hum.n *** descriptors used in our system.m.ke up the com.ination of HOG and SIFT that capture salient features of hum.ns ***,this system.is em.loyed to follow hum.ns that it *** results have been extracted for a set of sequences with standing and m.ving people at different positions and with a variation of backgrounds.

关键词： Hum.n detection Hum.n walker HOG SIFT descriptors AdaBoost learning

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Nuclear Science and Techniques 2018年第9期29卷 197-213页

作者： Ahm.d E.Aboanber Abdallah A.Nahla adel m.Edress Departm.nt of m.them.tics Faculty of Science Taibah University Departm.nt of m.them.tics Faculty of Science Tanta University

Fractional stochastic kinetics equations have proven to be valuable tools for the point reactor kinetics m.del, where the nuclear reactions are not fully described by determ.nistic relations. A fractional stochastic m.del for the point kinetics system.with m.lti-group of precursors,including the effect of tem.erature feedback, has been developed and analyzed. A m.jor m.them.tical and inflexible schem. to the point kinetics m.del is obtained by m.rging the fractional and stochastic technique. A novel split-step m.thod including m.them.tical tools of the Laplace transform., m.ttage–Leffler function, eigenvalues of the coefficient m.trix, and its corresponding eigenvectors have been used for the fractional stochastic m.trix differential equation. The validity of the proposed technique has been dem.nstrated via calculations of the m.an and standard deviation of neutrons and precursor populations for various reactivities: step, ram., sinusoidal, and tem.erature reactivity feedback. The results of the proposed m.thod agree well with the conventional one of the determ.nistic point kinetics equations.

关键词： Ito stochastic point kinetics equations Tem.erature feedback effects Wiener process Fractional calculus m.ttage–Leffler function

Inverse full state hybrid projective synchronization for chaotic m.ps with different dim.nsions

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Chinese Physics B 2016年第9期25卷 251-256页

作者： adel Ouannas Giuseppe Grassi Laboratory of m.them.tics Informatics and Systems (LAMIS) University of Larbi Tebessi Tebessa 12002 Algeria University del Salento Dipartimento Ingegneria Innovazione 73100 Lecce Italy

A new synchronization schem. for chaotic（hyperchaotic） m.ps with different dim.nsions is ***,given a drive system.m.p with dim.nsion n and a response system.with dim.nsion m.the proposed approach enables each drive system.state to be synchronized with a linear response com.ination of the response system.*** m.thod,based on the Lyapunov stability theory and the pole placem.nt technique,presents som. useful features：（i） it enables synchronization to be achieved for both cases of n 〈 m.and n 〉 m.（ii） it is rigorous,being based on theorem.;（iii） it can be readily applied to any chaotic（hyperchaotic） m.ps defined to ***,the capability of the approach is illustrated by synchronization exam.les between the two-dim.nsional H′enon m.p（as the drive system. and the three-dim.nsional hyperchaotic Wang m.p（as the response system.,and the three-dim.nsional H′enon-like m.p（as the drive system. and the two-dim.nsional Lorenz discrete-tim. system.as the response system..

关键词： chaotic m.p full state hybrid projective synchronization inverse problem.m.ps with different dim.nsions

Carbon nanotube-based nanoelectrom.chanical resonatoras m.ss biosensor

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Chinese Physics B 2020年第7期29卷 583-587页

作者： Ahm.d m.lseddawy adel HPhillips Ahm.d S Bayoum. Faculty of Graduate Studies University of WindsorWindsorOntarioCanada Faculty of Engineering Ain-Shams UniversityCairoEgypt Faculty of Engineering Kafr-Elsheikh UnversityKafr-ElsheikhEgypt

The use of single walled carbon nanotube-based nanoelectrom.chanical system.NEm.)resonator to sense the biom.lecules'm.ss is investigated under the influence of an external ac-field.A single walled carbon nanotube(SWCNT)cantilever has been proposed and studied if the m.ss is attached at the tip or various interm.diate *** shift of the resonant frequency and the quality factor have been investigated and show high sensitivity to the attached m.ss of biom.lecule and its *** proposed SWCNT-based NEm. resonator is a good candidate for sensing and tracing biom.lecules'm.ss as concentration of acetone in hum.n exhale,resulting in a painless,correct,and sim.le diabetics'diagnosis.

关键词： single walled carbon nanotube nanoelectrom.chanical system.resonator ac-field biom.lecule