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On the Approximation of Fractal-Fractional Differential Equations Using Numerical Inverse Laplace Transform Methods

Computer Modeling in Engineering & Sciences 2023年第6期135卷 2743-2765页

作者： Kamran Siraj Ahmad Kamal Shah Thabet Abdeljawad Bahaaeldin abdalla Department of Mathematics Islamia College PeshawarKhyber Pakhtoon KhwaPeshawar25120Pakistan Department of Mathematics and Sciences Prince Sultan UniversityP.O.Box 66833Riyadh11586Saudi Arabia Department of Mathematics University of MalakandChakdara Dir(L)Khyber Pakhtunkhwa18000Pakistan Department of Medical Research China Medical UniversityTaichung40402Taiwan

Laplace transform is one of the powerful tools for solving differential equations in engineering and other science *** the Laplace transform for solving differential equations,however,sometimes leads to solutions in the Laplace domain that are not readily invertible to the real domain by ***,we need numerical inversionmethods to convert the obtained solution fromLaplace domain to a real *** this paper,we propose a numerical scheme based on Laplace transform and numerical inverse Laplace transform for the approximate solution of fractal-fractional differential equations with orderα,β.Our proposed numerical scheme is based on three main ***,we convert the given fractal-fractional differential equation to fractional-differential equation in Riemann-Liouville sense,and then into Caputo ***,we transformthe fractional differential equation in Caputo sense to an equivalent equation in Laplace *** the solution of the transformed equation is obtained in Laplace ***,the solution is converted into the real domain using numerical inversion of Laplace *** inversion methods are evaluated in this paper,and their convergence is also *** test problems are used to validate the inversion *** demonstrate our results with the help of tables and *** obtained results show that Euler’s and Talbot’s methods performed better than Stehfest’s method.

关键词： Fractal-fractional differential equation power law kernel exponential decay kernel Mittag-Leffler kernel Laplace transform Euler’s method Talbot’s method Stehfest’s method

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Effect of smart sprinkler irrigation utilization on water use efficiency for wheat crops in arid regions

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International Journal of Agricultural and Biological Engineering 2014年第1期7卷 26-35页

作者： Hussein Mohammed Al-Ghobari Mohamed Said abdalla El Marazky Department of Agricultural Engineering College of Food and Agriculture Sciences King Saud UniversityRiyadh 11451Kingdom of Saudi Arabia

The smart irrigation system(SIS)developed in this research is a valuable tool for scheduling irrigation and quantifying water required by *** was implemented and tested under sprinkler irrigation system to irrigate wheat crops(YecoraRojo).Results obtained from this system were compared with the control irrigation system(CIS),whose scheduling method was based on data from an automatic weather *** indicated significant savings in applied water using the *** addition,the use of the SIS conserved 12%of irrigation water compared to CIS and obtained an economical *** water use efficiency(WUE)under SIS had generally higher values(1.64 kg/m^(3))compared to CIS(1.46 kg/m^(3)).Hence,the application of SIS technology provides significant advantages on WUE and irrigation water use efficiency(IWUE).Relatively high WUE and IWUE were found for the irrigation treatment(80%of evapotranspiration under SIS).Results showed that the irrigation requirements of wheat increased(100%of ETc under CIS)with increasing evapotranspiration(ETc)but excessive irrigation could decrease WUE and *** results indicated that extreme irrigation might not produce higher yield or optimal economic benefit,thus,suitable irrigation schedules by using SIS must be established and extendable to other agricultural crops.

关键词： smart irrigation system(SIS) sprinkler irrigation scheduling water use efficiency arid region evapotranspiration grain yield

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Hawking radiation received at infinity in higher dimensional Reissner-Nordstrom black hole spacetimes

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Chinese Physics C 2021年第8期45卷 182-189页

作者： Kai Lin Wei-Liang Qian Xilong Fan Bin Wang Elcio abdalla Hubei Subsurface Multi-scale Imaging Key Laboratory Institute of Geophysics and GeomaticsChina University of GeosciencesWuhan 430074China Escola de Engenharia de Lorena Universidade de Sao Paulo12602-810LorenaSPBrazil Center for Gravitation and Cosmology College of Physical Science and TechnologyYangzhou UniversityYangzhou 225009China Faculadade de Engenharia de Guaratingueta Universidade Estadual PaulistaGuaratinguetaSPBrazil School of Physics and Technology Wuhan UniversityWuhan 430072China Instituto de Fisica Universidade de Sao PauloSao PauloBrazil

In this study,we investigate the Hawking radiation in higher dimensional Reissner-Nordstrom black holes as received by an observer located at *** frequency-dependent transmission rates,which deform the thermal radiation emitted in the vicinity of the black hole horizon,are evaluated *** addition to those in four-dimensional spacetime,the calculations are extended to higher dimensional Reissner-Nordstrom metrics,and the results are observed to be sensitive to the spacetime dimension to an ***,we observe that the transmission coefficient practically vanishes when the frequency of the emitted particle approaches *** increases with frequency and eventually saturates to a certain *** four-dimensional spacetime,the above result is demonstrated to be mostly independent of the metric's parameter and the orbital quantum number of the particle,when the location of the event horizon,rh,and the product of the charges of the black hole and the particle qQ are ***,for higher-dimensional scenarios,the convergence becomes more ***,the difference between states with different orbital quantum numbers is observed to be more *** the magnitude of the product of charges qQ becomes more significant,the transmission coefficient exceeds *** other words,the resultant spectral flux is amplified,which results in an accelerated process of black hole *** relationship of the calculated outgoing transmission coefficient with existing results on the greybody factor is discussed.

关键词： Hawking radiation Reissner-Nordstrom black hole superradiation

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Study on Gain and WDM Transmission Performance of 465nm Ld-pumped Tm3+-Doped Telluride Glass Fibers

Study on Gain and WDM Transmission Performance of 465nm Ld-p...

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作者： Saadelnour abdalla 上海交通大学

学位级别：硕士

Gain and emission spectra characteristics of Tm

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Spontaneous ejaculation after spinal cord trauma

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Asian Journal of Andrology 2010年第4期12卷 609-610页

作者： Hossam A. Yasien abdalla M. Attia Department of Dermatology Andrology ＆ STDs Faculty of Medicine Menoufiya University Menoufiya 32511 Egypt

I am Dr Hossam A. Yasien, from the Department of Dermatology, Andrology ＆ STDs, Faculty of Medicine, Menoufiya University, Menoufiya, Egypt. Spinal cord lesions in humans are associated with impaired ejaculation [1], suggesting that the effects of descending pathways on the spinal ejaculatory mechanism are predominantly excitatory. In rodents, however, there may be an additional and important descending inhibitory pathway [2]. We report a case of a patient in whom a spinal trauma was unusually associated with spontaneous ejaculation.

关键词： ejaculation spinal trauma

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Deceptive jamming suppression in multistatic radar based on coherent clustering

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Journal of Systems Engineering and Electronics 2018年第2期29卷 269-277页

作者： abdalla Ahmed AHMED Mohaned Giess Shokrallah ZHAO Yuan XIONG Ying TANG Bin School of Electronic Engineering University of Electronic Science and Technology of China

This paper proposes a suppression method of the deceptive false target(FT) produced by digital radio frequency memory(DRFM) in a multistatic radar system. The simulated deceptive false targets from DRFM cannot be easily discriminated and suppressed with traditional radar systems. Therefore, multistatic radar has attracted considerable interest as it provides improved performance against deception jamming due to several separated receivers. This paper first investigates the received signal model in the presence of multiple false targets in all receivers of the multistatic radar. Then, obtain the propagation time delays of the false targets based on the cross-correlation test of the received signals in different receivers. In doing so, local-density-based spatial clustering of applications with noise(LDBSCAN) is proposed to discriminate the FTs from the physical targets(PTs) after compensating the FTs time delays, where the FTs are approximately coincident with one position, while PTs possess small *** simulations are carried out to demonstrate the feasibility and validness of the proposed method.

关键词： multistatic radar clustering analysis electronic counter-countermeasure(ECCM) deceptive jamming

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Multi-Criteria Prediction Mechanism for Vehicular Wi-Fi Offloading

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Computers, Materials & Continua 2021年第11期69卷 2313-2337页

作者： Mahmoud Alawi Raed Alsaqour Abdi abdalla Maha Abdelhaq Mueen Uddin Department of Computer Engineering and IT Faculty of EngineeringZanzibar UniversityZanzibarTanzania Department of Information Technology College of Computing and InformaticsSaudi Electronic UniversityRiyadh93499Saudi Arabia Department of Electronics and Telecommunications Engineering College of ICTUniversity of Dar es SalaamTanzania Department of Information Technology College of Computer and Information SciencesPrincess Nourah Bint Abdulrahman UniversityRiyadh84428Saudi Arabia Faculty of Science Universiti Brunei DarussalamNegara Brunei Darussalam

The growing demands of vehicular network applications,which have diverse networking and multimedia capabilities that passengers use while traveling,cause an overload of cellular *** scenario affects the quality of service(QoS)of vehicle and non-vehicle ***,wireless fidelity access points Wi-Fi access point(AP)and fourth generation long-term evolution advanced(4G LTE-A)networks are broadly ***-Fi APs can be utilized by vehicle users to stabilize 4G LTE-A ***,utilizing the opportunistic Wi-Fi APs to offload the 4G LTE-A networks in a vehicular ad hoc network environment is a relatively difficult *** condition is due to the short coverage of Wi-Fi APs and weak deployment strategies of *** studies have proposed that offloading mechanisms depend on the historical Wi-Fi connection patterns observed by an interest vehicle in making an offloading ***,depending solely on the historical connection patterns affects the prediction accuracy and offloading ratio of most existing mechanisms even when AP location information is *** present study proposed a multi-criteria wireless availability prediction(MWAP)mechanism,which utilizes historical connection patterns,historical data rate information,and vehicular trajectory computation to predict the next available AP and its expected data capacity in making offloading *** proposed mechanism is decentralized,where each vehicle makes the prediction by *** characteristic helps the vehicle users make a proactive offloading decision that maintains the QoS for different applications.A simulation utilizing MATLAB was conducted to evaluate the performance of the proposed mechanism and benchmark it with related state-of-the-art mechanisms.A comparison was made based on the prediction error and offloading ratio of the proposed mechanism in several *** MWAP mechanism exhibited a lower prediction error(i.e.,below 20%)and higher offloading rat

关键词： Vehicular network markov predictor 4G LTE-A Wi-Fi offloading prediction model heterogeneous network

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Aspartate transferase-to-platelet ratio index-plus: A new simplified model for predicting the risk of mortality among patients with COVID-19

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World Journal of Gastroenterology 2022年第16期28卷 1671-1680页

作者： Ali Madian Ahmed Eliwa Hytham abdalla Haitham A Azeem Aly Department of Internal Medicine Faculty of MedicineAl-Azhar University-AssiutAssiut 71524Egypt Department of Internal Medicine Faculty of MedicineAl-Azhar University-CairoCairo 11754Egypt Department of Chest Diseases Faculty of MedicineAl-Azhar University-AssiutAssiut 71524Egypt

BACKGROUND Coronavirus disease 2019(COVID-19)has a spectrum of clinical syndromes with serious involvement of the lung and frequent effection of the liver and hemostatic *** biomarkers are affordable,rapid,objective,and useful in the evaluation and prognostication of COVID-19 *** To investigate the association between aspartate transferase-to-platelet ratio index(APRI)and in-hospital mortality to develop a COVID-19 mortality prediction *** A multicenter cohort study with a retrospective design was *** records of all consecutive adult patients admitted to Al-Azhar University Hospital(Assiut,Egypt)and Chest Hospital(Assiut,Egypt)with confirmed COVID-19 from July 1,2020 to October 1,2020,were retrieved and *** patient cohort was classified into the following two categories based on the APRI:(1)COVID-19 presenting with APRI≤0.5;and(2)COVID-19 presenting with APRI(>0.5 and≤1.5).The association between APRI and all-cause in-hospital mortality was analyzed,and the new model was developed through logistic regression *** Of the 353 patients who satisfied the inclusion criteria,10%were admitted to the intensive care unit(n=36)and 7%died during the hospital stay(n=25).The median age was 40 years and 50.7%were *** admission,49%had aspartate transferase-dominant liver *** admission,APRI(>0.5 and≤1.5)was independently associated with all-cause in-hospital mortality in unadjusted regression analysis and after adjustment for age and sex;after stepwise adjustment for several clinically relevant confounders,APRI was still significantly associated with all-cause inhospital *** admission,APRI(>0.5 and≤1.5)increased the odds of mortality by fivetimes(P<0.006).From these results,we developed a new predictive model,the APRI-plus,which includes the four predictors of age,aspartate transferase,platelets,and serum *** for mortality was very good,with an area under the receiver operating curve

关键词： COVID-19 Aspartate transferase-to-platelet ratio index Aspartate transferase All-cause inhospital mortality Serum ferritin SARS-CoV-2

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Integration of Fog Computing for Health Record Management Using Blockchain Technology

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Computers, Materials & Continua 2022年第5期71卷 4135-4149页

作者： Mesfer AI Duhayyim Fahd N.Al-Wesabi Radwa Marzouk abdalla Ibrahim abdalla Musa Noha Negm Anwer Mustafa Hilal Manar Ahmed Hamza Mohammed Rizwanullah Department of Natural and Applied Sciences College of Community AflajPrince Sattam Bin Abdulaziz UniversitySaudi Arabia Department of Computer Science College of Science&Art at MahayilKing Khalid UniversitySaudi Arabia&Faculty of Computer and ITSana’a UniversityYemen Department of Information Systems College of Computer and Information SciencesPrincess Nourah Bint Abdulrahman UniversitySaudi Arabia&Department of MathematicsFaculty of ScienceCairo UniversityGiza12613Egypt Department of Computer Science College of ComputerQassim UniversityBuraydahSaudi Arabia Department of Computer Science King Khaled UniversityKSA&Faculty of ScienceDepartment of Mathematics and Computer ScienceMenoufia UniversityEgypt Department of Computer and Self Development Preparatory Year DeanshipPrince Sattam Bin Abdulaziz UniversityAlKharjSaudi Arabia

Internet of Medical Things (IoMT) is a breakthrough technologyin the transfer of medical data via a communication system. Wearable sensordevices collect patient data and transfer them through mobile internet, thatis, the IoMT. Recently, the shift in paradigm from manual data storage toelectronic health recording on fog, edge, and cloud computing has been *** advanced computing technologies have facilitated medical services withminimum cost and available conditions. However, the IoMT raises a highconcern on network security and patient data privacy in the health caresystem. The main issue is the transmission of health data with high security inthe fog computing model. In today’s market, the best solution is blockchaintechnology. This technology provides high-end security and authenticationin storing and transferring data. In this research, a blockchain-based fogcomputing model is proposed for the IoMT. The proposed technique embedsa block chain with the yet another consensus (YAC) protocol building securityinfrastructure into fog computing for storing and transferring IoMT data inthe network. YAC is a consensus protocol that authenticates the input datain the block chain. In this scenario, the patients and their family membersare allowed to access the data. The empirical outcome of the proposedtechnique indicates high reliability and security against dangerous *** major advantages of using the blockchain model are high transparency,good traceability, and high processing speed. The technique also exhibitshigh reliability and efficiency in accessing data with secure transmission. Theproposed technique achieves 95% reliability in transferring a large number offiles up to 10,000.

关键词： Fog computing IoMT block chain YAC security IoT consensus protocol

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Multipartite quantum correlations among atoms in QED cavities

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Frontiers of physics 2018年第1期13卷 163-178页

作者： J. Batle A. Farouk O. Tarawneh S. abdalla Departament de Fisica Universitat de les Illes Balears 07122 Palma de Mallorca Balearic Islands Spain Faculty of Computer and Information Sciences Mansoura University Egypt Information Technology Department Al-Zahra College for Women P.O. Box 3365 Muscat Oman Department of Physics Faculty of Science King Abdulaziz University Jeddah P.O. Box 80203. Jeddah 21589 Saudi Arabia

We study the nonlocality dynamics for two models of atoms in cavity quantum electrodynamics （QED）; the first model contains atoms in a single cavity undergoing nearest-neighbor interactions with no initial correlation, and tile second contains atoms confined in n different and noninteracting cavities, all of which were initially prepared in a maximally correlated state of n qubits corresponding to the atomic degrees of freedom. The nonlocality evolution of the states in the second model shows that the corresponding maximal violation of a multipartite Bell inequality exhibits revivals at precise times, defining, nonlocality sudden deaths and nonlocality sudden rebirths, in analogy with entanglement. These quantum correlations are provided analytically for the second model to make the study more thorough. Differences in the first model regarding whether the array of atoms inside the cavity is arranged in a periodic or open fashion are crucial to the generation or redistribution of quantum correlations. This contribution paves the way to using the nonlocality multipartite correlation measure for describing the collective complex behavior displayed by slightly interacting cavity QED arrays.

关键词： quantum optics cavity quantum electrodynamics multipartite nonlocality

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