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Explainable Conformer Network for Detection of COVID-19 Pneumonia from Chest CT scan: From Concepts toward Clinical Explainability

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Computers, Materials & Continua 2024年第1期78卷 1171-1187页

作者： Mohamed Abdel-Basset Hossam Hawash Mohamed Abouhawwash s.s.askar.alshaimaa a.tantawy Faculty of Computers and Informatics Zagazig UniversityZagazig44519Egypt Department of Computational Mathematics Scienceand Engineering(CMSE)Michigan State UniversityEast LansingMI48824USA Department of Mathematics Faculty of ScienceMansoura UniversityMansoura35516Egypt Department of statistics and Operations Research College of ScienceKing Saud UniversityP.O.Box 2455Riyadh11451Saudi Arabia

The early implementation of treatment therapies necessitates the swift and precise identification of COVID-19 pneumonia by the analysis of chest CT *** study aims to investigate the indispensable need for precise and interpretable diagnostic tools for improving clinical decision-making for COVID-19 *** paper proposes a novel deep learning approach,called Conformer Network,for explainable discrimination of viral pneumonia depending on the lung Region of Infections(ROI)within a single modality radiographic CT ***,an efficient U-shaped transformer network is integrated for lung image ***,a robust transfer learning technique is introduced to design a robust feature extractor based on pre-trained lightweight Big Transfer(BiT-L)and finetuned on medical data to effectively learn the patterns of infection in the input ***,this work presents a visual explanation method to guarantee clinical explainability for decisions made by Conformer *** evaluation of real-world CT data demonstrated that the diagnostic accuracy of ourmodel outperforms cutting-edge studies with statistical *** Conformer Network achieves 97.40% of detection accuracy under cross-validation *** model not only achieves high sensitivity and specificity but also affords visualizations of salient features contributing to each classification decision,enhancing the overall transparency and trustworthiness of our *** findings provide obvious implications for the ability of our model to empower clinical staff by generating transparent intuitions about the features driving diagnostic decisions.

关键词： Deep learning COVID-19 multi-modal medical image fusion diagnostic image fusion

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Analytical approximations to a generalized forced damped complex Duffing oscillator:multiple scales method and KBM approach

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Communications in Theoretical Physics 2023年第2期75卷 18-27页

作者： Weaam Alhejaili Alvaro H salas s A El-tantawy Department of Mathematical sciences College of SciencePrincess Nourah bint Abdulrahman UniversityP.O.Box 84428Riyadh 11671Saudi Arabia Department of Mathematics and statistics Universidad Nacional de ColombiaFIZMAKO Research GroupColombia Department of Physics Faculty of SciencePort Said UniversityPort Said 42521Egypt Research Center for Physics(RCP) Department of PhysicsFaculty of Science and ArtsAl-MikhwahAl-Baha UniversitySaudi Arabia

In this investigation,some different approaches are implemented for analyzing a generalized forced damped complex Duffing oscillator,including the hybrid homotopy perturbation method(H-HPM),which is sometimes called the Krylov-Bogoliubov-Mitropolsky(KBM)method and the multiple scales method(MsM).All mentioned methods are applied to obtain some accurate and stable approximations to the proposed problem without decoupling the original *** obtained approximations are discussed graphically using different numerical values to the relevant ***,all obtained approximate solutions are compared with the 4thorder Runge-Kutta(RK4)numerical *** maximum residual distance error(MRDE)is also estimated,in order to verify the high accuracy of the obtained analytic approximations.

关键词： complex Duffing oscillators forced damped complex oscillator multiple scales method KBM method

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A new approach for modelling the damped Helmholtz oscillator:applications to plasma physics and electronic circuits

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Communications in Theoretical Physics 2021年第3期73卷 119-130页

作者： s A El-tantawy Alvaro H salas M R Alharthi Department of Physics Faculty of SciencePort Said UniversityPort Said 42521Egypt Research Center for Physics(RCP) Department of PhysicsFaculty of Science and ArtsAl-MikhwahAl-Baha UniversitySaudi Arabia Department of Mathematics Universidad National de ColombiaUniversidad National de Colombia-Nubia Campus Derpartment of Mathematics and Statistics FIZMAKO Research GroupColombia Department of Mathematics and statistics College of ScienceTaif UniversityPO Box 11099Taif 21944Saudi Arabia

In this paper,a new approach is devoted to find novel analytical and approximate solutions to the damped quadratic nonlinear Helmholtz equation(HE)in terms of the Weiersrtrass elliptic *** exact solution for undamped HE(integrable case)and approximate/semi-analytical solution to the damped HE(non-integrable case)are given for any arbitrary initial *** a special case,the necessary and sufficient condition for the integrability of the damped HE using an elementary approach is *** general,a new ansatz is suggested to find a semi-analytical solution to the non-integrable case in the form of Weierstrass elliptic *** addition,the relation between the Weierstrass and Jacobian elliptic functions solutions to the integrable case will be derived in ***,we will make a comparison between the semi-analytical solution and the approximate numerical solutions via using Runge-Kutta fourth-order method,finite difference method,and homotopy perturbation method for the first-two ***,the maximum distance errors between the approximate/semi-analytical solution and the approximate numerical solutions will be *** real applications,the obtained solutions will be devoted to describe the characteristics behavior of the oscillations in RLC series circuits and in various plasma models such as electronegative complex plasma model.

关键词： damped and undamped Helmholtz equation Korteweg-de Vries type equation plasma oscillations nonlinear RLC circuits Weierstrass ellliptic function periodical solution

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Novel anlytical solution to the damped Kawahara equation and its application for modeling the dissipative nonlinear structures in a fluid medium

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Journal of Ocean Engineering and science 2022年第5期7卷 492-497页

作者： Noufe H.Aljahdaly s.A.El-tantawy Department of Mathematics Faculty of Sciences and Arts-Rabigh campusKing Abdulaziz UniversityJeddahSaudi Arabia Department of Physics Faculty of SciencePort Said UniversityPort Said 42521Egypt Research Center for Physics(RCP) Department of PhysicsFaculty of Science and ArtsAl-MikhwahAl-Baha UniversitySaudi Arabia

A novel approximate analytical solution to the linear damped Kawahara equation using a suitable hypothesis is reported for the first *** on the exact solutions(such as solitary waves,cnoidal waves,etc.)of the undamped Kawahara equation,the dissipative nonlinear structures like dissipative solitons and cnoidal waves are *** obtained solution is considered a general solution,i.e.,it can be applied for studying the properties of all dissipative traveling waves described by the linear damped Kawahara *** technique is not limited to solve the linear damped Kawahara equation only,but it can be used for solving a large number of non-integrable evolution equations related to the realistic natural ***,the maximum global residual error in the whole space-time domain is estimated for checking the accuracy of the obtained *** obtained solutions can help many researchers in explaining the ambiguities about the mechanisms of propagation of nonlinear waves in complex systems such as seas,oceans,plasma physics,and much more.

关键词： semi-analytical solutions Damped Kawahara equation A collisional plasma Dissipative Kawahara solitons and cnoidal waves

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The phase shift analysis of the colliding dissipative KdV solitons

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Journal of Ocean Engineering and science 2022年第6期7卷 521-527页

作者： Wedad Albalawi s.A.El-tantawy sadah A.Alkhateeb Department of Mathematical sciences College of SciencePrincess Nourah bint Abdulrahman UniversityRiyadhSaudi Arabia Department of Physics Faculty of SciencePort Said UniversityPort Said 42521Egypt Research Center for Physics(RCP) Department of PhysicsFaculty of Science and ArtsAl-MikhwahAl-Baha UniversitySaudi Arabia Mathematics Department Faculty of ScienceUniversity of JeddahJeddahSaudi Arabia

In this work,the head-on collisions of the non-stationary dissipative soliton in ultracold neutral plasmas(UNPs)are *** extended Poincare-Lighthill-Kuo(PLK)approach is adopted for reducing the fluid equations of the UNPs to two-counterpropagating damped Korteweg-de Vries(dKdV)*** dKdV equation is not an integrable Hamiltonian system,i.e.,does not have an exact ***,one of the main goal of this paper is to find a new general approximate analytical solution to the dKdV equation for investigating the mechanism of the propagation and interaction of the non-stationary dissipative *** residual error is estimated for checking the accuracy of the new obtained *** approximate analytical soliton solutions are adopted for deriving the temporal phase shifts after the *** impact of physical parameters on the nonstationary dissipative soliton profile and the temporal phase shifts is *** obtained results will contribute to understand the mechanism of propagation and interaction of many nonlinear phenomena in different nonlinear mediums such as ocean,sea,optical fiber,plasma physics,etc.

关键词： Dissipative soliton collisions Damped Korteweg-de Vries equation The extended Poincare-Lighthill-Kuo method The temporal phase shifts

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Multiple scales method for analyzing a forced damped rotational pendulum oscillatorwithgallows

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Communications in Theoretical Physics 2024年第5期76卷 58-67页

作者： Haifa A Alyousef Alvaro H salas B M Alotaibi s A El-tantawy Department of Physics College of SciencePrincess Nourah bint Abdulrahman UniversityP.O.Box 84428Riyadh 11671Saudi Arabia Department of Mathematics and statistics Universidad Nacional de ColombiaFIZMAKO Research GroupColombia Department of Physics Faculty of SciencePort Said UniversityPort Said 42521Egypt Research Center for Physics(RCP) Department of PhysicsFaculty of Science and ArtsAl-MikhwahAl-Baha UniversityAl-Baha 1988Saudi Arabia

This study reports the analytical solution for a generalized rotational pendulum system with gallows and periodic excited *** multiple scales method(MsM)is applied to solve the proposed *** types of rotational pendulum oscillators are studied and talked about in *** include the forced damped rotating pendulum oscillator with gallows,the damped standard simple pendulum oscillator,and the damped rotating pendulum oscillator without *** MsM first-order approximations for all the cases mentioned are derived in *** obtained results are illustrated with concrete numerical *** first-order MsM approximations are compared to the fourth-order Runge-Kutta(RK4)numerical ***,the maximum error is estimated for the first-order approximations obtained through the MsM,compared to the numerical approximations obtained by the RK4 ***,we conducted a comparative analysis of the outcomes obtained by the used method(MsM)and He-MsM to ascertain their respective levels of *** proposed method can be applied to analyze many strong nonlinear oscillatory equations.

关键词： rotational pendulum system multiple scales method approximate solution damped oscillations forced pendulum with gallows he-multiple scales method

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Optimal analytical and numerical approximations to the(un)forced(un)damped parametric pendulum oscillator

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Communications in Theoretical Physics 2022年第10期74卷 16-29页

作者： Haifa A Alyousef M R Alharthi Alvaro H salas s A El-tantawy Department of physics College of SciencePrincess Nourah bint Abdulrahman UniversityP.O.Box 84428Riyadh 11671Saudi Arabia Department of Mathematics and statistics College of ScienceTaif UniversityP.O.Box 11099Taif 21944Saudi Arabia Department of Mathematics and statistics Universidad Nacional de ColombiaFIZMAKO Research GroupSede ManizalesColombia Department of Physics Faculty of SciencePort Said UniversityPort Said 42521Egypt Research Center for Physics(RCP) Department of PhysicsFaculty of Science and ArtsAl-MikhwahAl-Baha UniversitySaudi Arabia

The(un)forced(un)damped parametric pendulum oscillator(PPO)is analyzed analytically and numerically using some simple,effective,and more accurate *** the first technique,the ansatz method is employed for analyzing the unforced damped PPO and for deriving some optimal and accurate analytical approximations in the form of angular Mathieu *** the second approach,some approximations to(un)forced damped PPO are obtained in the form of trigonometric functions using the ansatz *** the third approach,He’s frequency-amplitude principle is applied for deriving some approximations to the(un)damped *** the forth approach,He’s homotopy technique is employed for analyzing the forced(un)damped PPO *** the fifth approach,the p-solution Method,which is constructed based on Krylov–Bogoliúbov Mitropolsky method,is introduced for deriving an approximation to the forced damped *** the final approach,the hybrid Padé-finite difference method is carried out for analyzing the damped PPO *** proposed techniques are compared to the fourth-order Runge–Kutta(RK4)numerical ***,the global maximum residual distance error is estimated for checking the accuracy of the obtained *** proposed methodologies and approximations can help many researchers in studying and investigating several nonlinear phenomena related to the oscillations that can arise in various branches of science,*** and oscillations in plasma physics.

关键词： parametric pendulum equation Ansatz method He’s frequency-amplitude principle He’s homotopy technique Krylov-Bogoliúbov Mitropolsky method the hybrid Padé-finite difference method

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On the analytical soliton approximations to fractional forced Korteweg-de Vries equation arising in fluids and plasmas using two novel techniques

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Communications in Theoretical Physics 2024年第8期76卷 1-10页

作者： Weaam Alhejaili Emad A Az-Zo’bi Rasool shah s A El-tantawy Department of Mathematical sciences College of SciencePrincess Nourah bint Abdulrahman UniversityPO Box 84428Riyadh 11671Saudi Arabia Department Mathematics and statistics Mutah UniversityAl-KarakJordan Department of Computer science and Mathematics Lebanese American UniversityBeirutLebanon Department of Physics Faculty of SciencePort Said UniversityPort Said 42521Egypt Department of Physics Faculty of ScienceAl-Baha UniversityAl-Baha P.O.Box 1988Saudi Arabia

The current investigation examines the fractional forced Korteweg-de Vries(FF-KdV) equation,a critically significant evolution equation in various nonlinear branches of science. The equation in question and other associated equations are widely acknowledged for their broad applicability and potential for simulating a wide range of nonlinear phenomena in fluid physics, plasma physics, and various scientific domains. Consequently, the main goal of this study is to use the Yang homotopy perturbation method and the Yang transform decomposition method, along with the Caputo operator for analyzing the FF-KdV equation. The derived approximations are numerically examined and discussed. Our study will show that the two suggested methods are helpful, easy to use, and essential for looking at different nonlinear models that affect complex processes.

关键词： forced fractional KdV equation Caputo operator Yang homotopy perturbation method Yang transform decomposition method solitons

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Formation of Alfvénic supernonlinear waves in a plasma containing double spectral distributed electrons

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Communications in Theoretical Physics 2024年第12期76卷 140-149页

作者： A A El-tantawy W F El-Taibany s K El-Labany A M Abdelghany Department of Physics Faculty of Science Damietta University Center of space Research and Its Application Damietta University

The characteristics of nonlinear and supernonlinear Alfvén waves propagating in a multicomponent plasma composed of a double spectral electron distribution and positive and negative ions were investigated. The sagdeev technique was employed, and an energy equation was derived. Our findings show that the proposed system reveals the existence of a double-layer solution, periodic, supersoliton, and superperiodic waves. The phase portrait and potential analysis related to these waves were investigated to study the main features of existing waves. It was also found that decreasing the electron temperature helps the superperiodic structure to be excited in our plasma model. Our results help interpret the nonlinear and supernonlinear features of the recorded Alfvén waves propagating in the ionosphere D-region.

关键词： Alfvén waves double spectral distribution nonlinear waves sagdeev method supernonlinear waves

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Journal of Ocean Engineering and science 2022年第4期7卷 321-326页

作者： H.I.Abdel-Gawad M.tantawy M.s.Mani Rajan Department of Mathematics Faculty of ScienceCairo UniversityGizaEgypt Department of Basic sciences Faculty of EngineeringOctober 6 UniversityGizaEgypt Department of Physics University College of EngineeringAnna UniversityRamanathapuramIndia

The oscillatory motion on the ocean surface is a combination of a variety of different types of *** regularized waves are among ***,it is shown that they arise as solutions of the(1+2)-dimensional Benjamin-Bona-Mahony equation(BBME).Numerous works on(1+1)-dimensional BBME were carried in the *** this paper,we consider the(1+2)-dimensional non-autonomous BBME,with time-dependent *** model equation is completely *** objective is to find the exact solutions and investigate the relevant *** solve this issue,the extended unified method is used to find the exact solutions in the form of semi-self similar and self similar *** solve this issue,simi-larity transformations are ***,the generalized unified methods(GUM)are also used in the symbolic *** numerical results of these solutions are evaluated and are shown *** wave patterns of regularized waves in shallow water,near ocean shores,are ***-tory waves and vector of lumps with troughs are *** time-dependent coefficients are used,here,to control the different wave patterns that take the forms of the multi-U shaped wave with basins with a *** pattern formation occurs,which is in the form of two layers of lumps with *** tunneling is also *** waves patterns are *** stability of the steady state solutions is *** is found that the stability depends significantly on the dispersion coefficient.

关键词： (1+2)-dimensional Benjamin-Bona-Mahony equation Extended unified method Wave patterns similariton solutions

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