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MEIR-KEELER TYPE CONTRACTIONS FOR TRIPLED FIXED POINTS

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Acta Mathematica Scientia 2012年第6期32卷 2119-2130页

作者： hassen aydi Erdal Karapvnar Calogero Vetro Universitde Monastir Institut Supérieur d'Informatique de MahdiaRoute de RéjicheKm 4BP 35Mahdia 5121Tunisie Department of Mathematics Atilim University 06836IncekAnkaraTurkey Dipartimento di Matematica e Informatica Universitàdi PalermoVia Archirafi3490123 PalermoItaly

In 2011, Berinde and Borcut [6] introduced the notion of tripled fixed point in partially ordered metric spaces. In our paper, we give some new tripled fixed point theorems by using a generalization of Meir-Keeler con... 详细信息

关键词： tripled fixed point theorems Meir-Keeler type contractions partially or-dered sets

Some Formulas Involving Hypergeometric Functions in Four Variables

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Computer Modeling in Engineering & Sciences 2022年第2期130卷 887-902页

作者： hassen aydi Ashish Verma Jihad Younis Jung Rye Lee Universit´e de Sousse Institut Sup´erieur D’Informatique etDes Techniques de CommunicationH.Sousse4000Tunisia Department of Mathematics and Applied Mathematics Sefako Makgatho Health Sciences UniversityGa-RankuwaSouth Africa ChinaMedical University Hospital ChinaMedical UniversityTaichung40402Taiwan Department of Mathematics V.B.S.Purvanchal UniversityJaunpur222003India Department of Mathematics Aden UniversityKhormaksarP.o.Box 6014Yemen Department of Data Science Daejin UniversityKyunggi11159Korea

Several(generalized)hypergeometric functions and a variety of their extensions have been presented and investigated in the literature by many *** the present paper,we investigate four new hypergeometric functions in four variables and then establish several recursion formulas for these new ***,some interesting particular cases and consequences of our results are discussed.

关键词： Recursion formula quadruple hypergeometric functions pascal identity

Optimizing Deep Learning for Computer-Aided Diagnosis of Lung Diseases: An Automated Method Combining Evolutionary Algorithm, Transfer Learning, and Model Compression

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Computer Modeling in Engineering & Sciences 2024年第3期138卷 2519-2547页

作者： hassen Louati Ali Louati Elham Kariri Slim Bechikh College of Information Technology Kingdom UniversityRiffa40434Bahrain SMART Lab University of TunisISGTunisTunisia Department of Information Systems College of Computer Engineering and SciencesPrince Sattam bin Abdulaziz UniversityAl-Kharj11942Saudi Arabia

Recent developments in Computer Vision have presented novel opportunities to tackle complex healthcare issues,particularly in the field of lung disease *** promising avenue involves the use of chest X-Rays,which are commonly utilized in *** fully exploit their potential,researchers have suggested utilizing deep learning methods to construct computer-aided diagnostic ***,constructing and compressing these systems presents a significant challenge,as it relies heavily on the expertise of data *** tackle this issue,we propose an automated approach that utilizes an evolutionary algorithm(EA)to optimize the design and compression of a convolutional neural network(CNN)for X-Ray image *** approach accurately classifies radiography images and detects potential chest abnormalities and infections,including ***,our approach incorporates transfer learning,where a pre-trainedCNNmodel on a vast dataset of chest X-Ray images is fine-tuned for the specific task of detecting *** method can help reduce the amount of labeled data required for the task and enhance the overall performance of the *** have validated our method via a series of experiments against state-of-the-art architectures.

关键词： Computer-aided diagnosis deep learning evolutionary algorithms deep compression transfer learning

Intersubband transitions in In_xAl_(1-x)N/In_yGa_(1-y)N quantum well operating at 1.55 μm

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Chinese Physics B 2014年第9期23卷 394-398页

作者： hassen Dakhlaoui Department of Physics College of Science for Girls

In this paper, we theoretically study the effects of doping concentration ND and an external electric field on the intersubband transitions in InxAl（l-x）N/InyGa（l-y）N single quantum well by solving the Schrodinger and Poisson equations self-consistently. Obtained results including transition energies, the band structure, and the optical absorption have been discussed. The lowest three intersubband transitions （E2 -El）, （E3 -El）, and （E3 -E2） are calculated as functions of doping concentration ND. By increasing the doping concentration ND, the depletion effect can be reduced, and the ionized electrons will compensate the internal electric field which results from the spontaneous polarization. Our results show that an optimum concentration ND exists for which the transition 0.8 eV （1.55 μm） is carried out. Finally, the dependence of the optical absorption α13（ω） on the external electric field and doping concentration is studied. The maximum of the optical absorption can be red-shifted or blue-shifted through varying the doping concentration and the external electric field. The obtained results can be used for designing optical fiber telecommunications operating at 1.55 μm.

关键词： intersubband transition delta doping InGaN/GaN quantum well

Quantum Size and Doping Concentration Effects on the Current-Voltage Characteristics in GaN Resonant Tunneling Diodes

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Chinese Physics Letters 2013年第7期30卷 185-188页

作者： hassen Dakhlaoui Department of Physics College of Science for GirlsDammam 31113Saudi Arabia

We theoretically investigate the effects of quantum size and doping concentration on the current-voltage characteristics of GaN resonant tunneling *** results show a marked dependence of the peak current density on the emitter and collector spacers,and the existence of some thickness in the emitter,for which the electric current density reaches its maximum with a large peak-to-valley *** also study the effect of the doping concentration in the emitter and collector *** is found that the doping concentration can greatly affect the current-voltage *** particular,it increases the peak of the current density and displaces the position of the maxima of the current dependence on the applied bias *** effects of aluminum concentration and temperature are also ***,it is demonstrated that it is possible to have a symmetrical current for applying bias voltage in both directions by adjusting the thickness of the collector spacer.

关键词： doping Tunnel Quantum

An Integrated Multilayered Framework for IoT Security Intrusion Decisions

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Intelligent Automation & Soft Computing 2023年第4期36卷 429-444页

作者： hassen Sallay Umm Al-Qura University Makkah225400KSA

Security breaches can seriously harm the Internet of Things(IoT)and Industrial IoT(IIoT)*** damage can exceedﬁnancial and material losses to threaten human *** these security risks is challenging given IoT ubiquity,complexity,and restricted *** intrusion man-agement is a cornerstone in fortifying the defensive security *** paper presents an integrated multilayered framework facilitating the orchestration of the security intrusion management process and developing security decision support *** proposed framework incorporates four layers with four dedicated processing *** paper focuses mainly on the analytical *** present the architecture and models for predictive intrusion analytics for reactive and proactive defense *** differentiate between the device and network levels to master the complexity of IoT ***ﬁting from the singu-larity of IIoT devices trafﬁc,we approach the reactive security intrusion predic-tion through outlier detection models *** thoroughly experiment with ten outlier detection models on the IIoT wustl realistic *** obtained results show the adequacy of the approach with an area under the curve(AUC)results surpassing 98%for several models with a good level of precision and time efﬁ-***,we investigate the use of survival analysis semi-parametric predictive models to forecast the security intrusion before its occurrence for the proactive security *** experiments show encouraging results with a con-cordance index(c-Index)reaching 89%and an integrated brier score(IBS)of *** integrating outlier intrusion detection and survival forecasting,the fra-mework provides a valuable means to monitor the security intrusions in IoT.

关键词： IoT intrusion framework outlier detection survival analysis

Shift Endpoint Trace Selection Algorithm and Wavelet Analysis to Detect the Endpoint Using Optical Emission Spectroscopy

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Photonic Sensors 2016年第2期6卷 158-168页

作者： Sihem BEN ZAKOUR hassen TALEB Higher Institute of Management Tunis University of Tunis Tunisia Higher institute of Business and Accounting Bizerte University of Carthage Tunisia

Endpoint detection （EPD） is very important undertaking on the side of getting a good understanding and figuring out if a plasma etching process is done on the right way. It is truly a crucial part of supplying repeatable effects in every single wafer. When the film to be etched has been completely erased, the endpoint is reached. In order to ensure the desired device performance on the produced integrated circuit, many sensors are used to detect the endpoint, such as the optical, electrical, acoustical/vibrational, thermal, and frictional. But, except the optical sensor, the other ones show their weaknesses due to the environmental conditions which affect the exactness of reaching endpoint. Unfortunately, some exposed area to the film to be etched is very low （〈0.5%）, reflecting low signal and showing the incapacity of the traditional endpoint detection method to determine the wind-up of the etch process. This work has provided a means to improve the endpoint detection sensitivity by collecting a huge numbers of full spectral data containing 1201 spectra for each run, then a new unsophisticated algorithm is proposed to select the important endpoint traces named shift endpoint trace selection （SETS）. Then, a sensitivity analysis of linear methods named principal component analysis （PCA） and factor analysis （FA）, and the nonlinear method called wavelet analysis （WA） for both approximation and details will be studied to compare performances of the methods mentioned above. The signal to noise ratio （SNR） is not only computed based on the main etch （ME） period but also the over etch （OE） period. Moreover, a new unused statistic for EPD, coefficient of variation （CV）, is proposed to reach the endpoint in plasma etches process.

关键词： Dimension reduction OES plasma etching process wavelet analysis CV SNR

Velocity gradient elasticity for nonlinear vibration of carbon nanotube resonators

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Frontiers of Structural and Civil Engineering 2020年第6期14卷 1520-1530页

作者： Hamid MSEDIGHI hassen MOUAKAD Mechanical Engineering Deparment Faculty of Engineering Shahid Chamran University of AhvazAhvaz ***Iran Driling Center of Exellence and Research Center Shahid Chamran University of AhvazAhvaz ***Iran Mechanical and Industrial Engineering Department Collge of EngineeringSultan Qaboos UniversitMuscalOMAN

In this study,for the first time,we investigate the nonlocality superimposed to the size effects on the nonlinear dynamics of an electrically actuated single-walled carbon-nanotube-based *** undertake two models to capture the nanostructure nonlocal size effects:the strain and the velocity gradient *** use a reduced-order model based on the differential quadrature method(DQM)to discretize the goverming nonlinear equation of motion and acquire a discretized-parameter nonlinear model of the *** structural nonlinear behavior of the system assuming both strain and velocity gradient theories is investigated using the discretized *** results suggest that nonlocal and size effects should not be neglected because they improve the prediction of corresponding dynamic amplitudes and,most importantly,the critical resonant frequencies of such *** these effects may impose a considerable source of error,which can be amended using more accurate modeling techniques.

关键词： velocity gradient elasticity theory nanotube resonators differential-quadrature method nonlinear vibration

Experimental and theoretical investigations of the lateral vibrations of an unbalanced Jeffcott rotor

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Frontiers of Structural and Civil Engineering 2020年第4期14卷 1024-1032页

作者： Ali ALSALEH Hamid MSEDIGHI hassen MOUAKAD Saudi Arabian Oil Company(ARAMCO) Dhahran 31311Saudi Arabia Mechanical Engineering Deparment Faculty of EngineeringShahid Chamran University of AhvazAhvaz 61357-43337Iran Drilling Center of Excellence and Research Shahid Chamran University of AhvazAhvaz 61357-43337Iran Mechanical and Industrial Engineering Deparment Sultan Qaboos UniversinAI Khoudh MuscatOman

The current work experimentally explores and then theoretically examines the lateral vibrations of an unbalanced Jeffcott rotor-system working at several unbalance *** this end,three conditions of eccentric masses are considered by using a Bently Nevada RK-4 rotor *** of the steady-state as well as the startup data at rigid and flexible rotor states are captured by conducting a setup that mimics the vibration monitoring industrial *** linear governing equation of the considered rotor is extracted by adopting the Lagrange method on the basis of rigid rotor assumptions to theoretically predict the lateral *** dynamic features of the rotor system such as the linearized bearing induced stiffness are exclusively acquired from startup *** is demonstrated that,with an error of less than 5%,the proposed two-degrees-of-freedom model can predict the flexural vibrations at rigid *** at flexible condition,it fails to accurately predict the dynamic *** contrast to the other works where nonlinear mathematical models with some complexities are proposed to mathematically model the real systems,the present study illustrates the applicability of employing simple models to predict the dynamic response of a real rotor-system with an acceptable accuracy.

关键词： rotor-dynamics Jeffcott rotor lateral vibrations Lagrange method system-equivalent stfess sleeve bearings il film induced stiffness