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GA-Stacking:A new Stacking-Based Ensemble Learning Method to Forecast the COVID-19 Outbreak

Computers, Materials & Continua 2023年第2期74卷 3945-3976页

作者： walaa n.ismail Hessah A.Alsalamah Ebtesam Mohamed Department of Management Information Systems College of Business AdministrationAl Yamamah UniversityRiyadh11512Saudi Arabia Faculty of Computers and Information Minia UniversityMinia61519Egypt Information Systems Department College of Computer and Information SciencesKing Saud UniversityRiyadh4545Saudi Arabia Computer Engineering Department College of Engineering and ArchitectureAl Yamamah UniversityRiyadh11512Saudi Arabia

As a result of the increased number of COVID-19 cases,Ensemble Machine Learning(EML)would be an effective tool for combatting this pandemic *** ensemble of classifiers can improve the performance of single machine learning(ML)classifiers,especially stacking-based ensemble *** utilizes heterogeneous-base learners trained in parallel and combines their predictions using a meta-model to determine the final prediction ***,building an ensemble often causes the model performance to decrease due to the increasing number of learners that are not being properly ***,the goal of this paper is to develop and evaluate a generic,data-independent predictive method using stacked-based ensemble learning(GA-Stacking)optimized by aGenetic Algorithm(GA)for outbreak prediction and health decision aided ***-Stacking utilizes five well-known classifiers,including Decision Tree(DT),Random Forest(RF),RIGID regression,Least Absolute Shrinkage and Selection Operator(LASSO),and eXtreme Gradient Boosting(XGBoost),at its first *** also introduces GA to identify comparisons to forecast the number,combination,and trust of these base classifiers based on theMean Squared Error(MSE)as a fitness *** the second level of the stacked ensemblemodel,a Linear Regression(LR)classifier is used to produce the final *** performance of the model was evaluated using a publicly available dataset from the Center for Systems Science and Engineering,Johns Hopkins University,which consisted of 10,722 data *** experimental results indicated that the GA-Stacking model achieved outstanding performance with an overall accuracy of 99.99%for the three selected ***,the proposed model achieved good performance when compared with existing baggingbased *** proposed model can be used to predict the pandemic outbreak correctly and may be applied as a generic data-independent model 3946 CMC,2023,vol.74,no.2 to pre

关键词： COVID-19 ensemble machine learning genetic algorithm machine learning stacking ensemble unbalanced dataset vaccine

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Material selection of polymeric composite automotive bumper beam using analytical hierarchy process

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Journal of Central South University 2010年第2期17卷 244-256页

作者： A.HAMBALI S.M.SAPUAn n.ismail Y.nUKMAn Department of Mechanical and Manufacturing Engineering Universiti Putra Malaysia Department of Engineering Design and Manufacture University of Malaya

Selection of materials,as an area of design research,has been under considerable interest over the *** selection is one of the most important activities in the product development *** decision of materials can cause the product to be reproduced or *** avoid this circumstance,one of the useful tools that can be employed in determining the most appropriate material is analytical hierarchy process(AHP).To illustrate the application of AHP,six different types of composite materials were *** most appropriate one for suitability of use in manufacturing automotive bumper beam was determined by considering eight main selection factors and 12 *** AHP analysis reveals that the glass fibre epoxy is the most appropriate material because it has the highest value(25.7%,mass fraction) compared with other *** final material is obtained by performing six different scenarios of the sensitivity *** is proved that glass fibre epoxy is the most optimum decision.

关键词： composite polymer matrix bumper beam analytical hierarchy process

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Preparation of an adsorptive membrane of polyvinylidene fluoride incorporated functionalized boron nitride nanosheets for arsenic removal

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Chinese Journal of Chemical Engineering 2024年第12期76卷 49-63页

作者： S.Selambakkannu n.L.Ishak n.M.Fauzi n.ismail Z.A.Karim Radiation Processing Technology Division Malaysia Nuclear AgencyBangiKajang 43000Malaysia Advanced Membrane Technology Research Centre(AMTEC) Faculty of Chemical and Energy EngineeringUniversiti Teknologi MalaysiaSkudaiJohor81310Malaysia

Incorporating nanomaterials into membranes will enhance wastewater treatment efficiency with their unique characteristics,such as higher permeability,thermal stability,surface roughness,hydrophilicity,and fouling *** this study,the surface-modified boron nitride with phosphoric acid 2-hydroxyethyl methacrylate ester(PA/Bn)was grafted with polyethylene glycol(PEG)via conventional *** PEG grafted PA/Bn(PEG-g-PA/Bn)melt blended with polyvinylidene fluoride(PVDF)resin by using an internal mixer at different mass percentages 100%PVDF(PVDF),3%PEG-g-PA/Bn+97%PVDF(97:3 Bn),5%PEG-g-PA/Bn+95%PVDF(95:5 Bn),7%PEG-g-PA/Bn+93%PVDF(93:7 Bn),and 7%PEG-g-PA/BnnS+93%PVDF(93:7 BnnS).Phase inversion technique was used to cast the blended mixture into a thin *** prepared membranes were analyzed with different characterization techniques to determine chemical composition,crystallinity,morphology,and thermal *** prepared composite membrane was evaluated in terms of water permeability,anti-fouling resistance,and solute rejection efficiency with deionized water,bovine serum albumin,and arsenic solution as *** membranes show high water flux and *** water flux and porosity of the blends decrease as the percentage of PEG-g-PA/Bn ***,the highest removal capacity for arsenic was observed at 93:7 *** adsorption of arsenic ions takes place via complexation with PA/Bn in the PVDF *** was confirmed with field emission scanning electron microscopyeenergy-dispersive X-ray analysis and X-ray photoelectron spectroscopy analyses.

关键词： Adsorption Ultrafiltration Preparation Membranes

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Advanced hydrogen storage of the Mg–na–Al system:A review

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Journal of Magnesium and Alloys 2021年第4期9卷 1111-1123页

作者： n.A.Ali M.ismail Energy Storage Research Group Faculty of Ocean Engineering Technology and InformaticsUniversiti Malaysia Terengganu21030 Kuala NerusTerengganuMalaysia

A solid-state storage system is the most practical option for hydrogen because it is more convenient and *** hydrides,especially MgH_(2),are the most promising materials that offer high gravimetric capacity and good ***,the practical application of MgH_(2) is restricted by slow sorption kinetics and high stability of thermodynamic *** storage performance of MgH_(2) was enhanced by introducing the Mg–na–Al system that destabilises MgH_(2) with naAlH_(4).The Mg–na–Al system has superior performance compared to that of unary MgH_(2) and naAlH_(4).To boost the performance of the Mg–na–Al system,the ball milling method and the addition of a catalyst were *** Mg–na–Al system resulted in a low onset decomposition temperature,superior cyclability and enhanced kinetics *** Al_(12)Mg_(17) and naMgH_(3) that formed in situ during the dehydrogenation process modify the reaction pathway of the Mg–na–Al system and alter the thermodynamic *** this paper,the overview of the recent progress in hydrogen storage of the Mg–na–Al system is *** remaining challenges and future development of Mg–na–Al system are also *** paper is the first review report on hydrogen storage properties of the Mg–na–Al system.

关键词： Mg-na-Al system MgH_(2) naAlH_(4) Al_(12)Mg_(17) hydrogen storage

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Incidence and risk factors of post-phototherapy neonatal rebound hyperbilirubinemia

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World Journal of Pediatrics 2018年第4期14卷 350-356页

作者： ismail Mohamed Elhawary Eman Abdel Ghany Abdel Ghany walaa Alsharany Aboelhamed Shahinaz Gamal Eldin Ibrahim Department of Pediatrics Faculty of MedicineCairo UniversityAli Basha EbrahimPO Box 11562CairoEgypt Department of Pediatrics Ministry of HealthCairoEgypt

Background To determine the incidence and risk factors of post-phototherapy rebound hyperbilirubinemia because data about bilirubin rebound in neonates are lacking and few studies have concerned this condition. Methods A prospective observational study was conducted on 500 neonates with indirect hyperbilirubinemia who were treated according to standard guidelines. Total serum bilirubin (TSB) was measured at 24–36 h after phototherapy;significant bilirubin rebound (SBR) is considered as increasing TSB that needs reinstitution of phototherapy. Results A total of 124 (24.9%) neonates developed SBR with TSB increased by 3.4 (2.4–11.2) mg/dL after stopping pho-totherapy. Multiple logistic regression model revealed the following significant risk factors for rebound: low birth weight (B = 1.3,P ntensive phototherapy (B = 0.83, P= 0.03, OR 2.3), hemolysis (B = 1.2,P n level (B = 0.3,P = 0.001, OR 1.3), and short duration of conventional phototherapy (B = ? 1.2,P nclusions SBR should be considered in neonates with hemolysis, low birth weight, suspected sepsis, short duration of conventional phototherapy, exposure to intensive phototherapy, and relatively high discharge TSB. These risk factors should be taken into account when planning post-phototherapy follow-up.

关键词： Conventional phototherapy Hemolysis Intensive phototherapy neonatal hyperbilirubinemia Rebound hyperbilirubinemia

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Experimental and computational chemical studies on the cationic furanylnicotinamidines as novel corrosion inhibitors in aqueous solutions

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Chinese Journal of Chemical Engineering 2020年第2期28卷 477-491页

作者： Abdelaziz S.Fouda Mohamed A.ismail Rabab M.Abou-shahba walaa A.Husien Esraa S.EL-Habab Ashraf S.Abousalem Department of Chemistry Faculty of ScienceEl-Mansoura UniversityEl-Mansoura 35516Egypt Department of Chemistry Faculty of ScienceAl-Azhar UniversityEgypt Quality Control Laboratory Operation DepartmentJOTUNEgypt

The corrosion inhibition action of three newly synthesized furanylnicotinamidine derivatives namely: 6-[5-{4(dimethylamino)phenyl}furan-2-yl]nicotinamidine(MA-1256), 6-[5-(4-chlorophenyl)furan-2-yl]nicotinamidine(MA-1266), and 6-[5-{4-(dimethylamino)phenyl}furan-2-yl]nicotinonitrile(MA-1250) on carbon steel(C-steel) was investigated in 1.0 mol·L-1 HCl solution by weight loss(WL), potentiodynamic polarization(PP), electrochemical impedance spectroscopy(EIS), and electrochemical frequency modulation(EFM)techniques. Morphological analysis was performed on the uninhibited and inhibited C-steel using atomic force microscope(AFM) and Infrared Spectroscopy(ATR-IR) methods. The effect of temperature was studied and discussed. Inspection of experimental results revealed that the inhibition efficiency(IE) increases with the incremental addition of inhibitors and with elevating the temperature of the acid media. The adsorption of furanylnicotinamidine derivatives on C-steel follows Temkin’s isotherm. PP studies indicated that the investigated compounds act as mixed-type inhibitors and showed that p-dimethylaminophenyl furanylnicotinamidine derivative(MA-1256) was the most efficient inhibitor among the other studied derivatives with IE reached(95%)at 21 × 10-6 mol·L-1. MA-1266 is highly soluble in aqueous solution and has non-toxicity profile with LC50 n 37 mg·L-1. Thus, MA-1266 can be a promising green corrosion inhibitor candidate with IE n 91% at 21× 10-6 mol·L-1. The experiments were coupled with computational chemical theories such as quantum chemical and molecular dynamic methods. The experimental results were in good agreement with the computational outputs.

关键词： Acid corrosion C-steel Furanylnicotinamidines Green inhibitor Computational chemical methods

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Strain effect on graphene nanoribbon carrier statistic in the presence of non-parabolic band structure

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Chinese Physics B 2016年第9期25卷 480-483页

作者： n A Izuani Che Rosid M T Ahmadi Razali ismail Department of Electronics and Computer Engineering Faculty of Electrical EngineeringUniversiti Teknologi Malaysia nanoelectronic Group Physics DepartmentFaculty of ScienceUrmia University

The effect of tensile uniaxial strain on the non-parabolic electronic band structure of armchair graphene nanoribbon（AGnR） is *** addition,the density of states and the carrier statistic based on the tight-binding Hamiltonian are modeled *** is found that the property of AGnR in the non-parabolic band region is varied by the *** tunable energy band gap in AGnR upon strain at the minimum energy is described for each of n-AGnR families in the non-parabolic *** behavior of AGnR in the presence of strain is attributed to the breakable AGnR electronic band structure,which varies the physical properties from its *** linear relation between the energy gap and the electrical properties is featured to further explain the characteristic of the deformed AGnR upon strain.

关键词： strain graphene nanoribbon uniaxial strain current–voltage characteristic

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Antimonene-based saturable absorber for a soliton mode-locked and Q-switched fiber laser in the 2 μm wavelength region

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Chinese Physics B 2023年第6期32卷 259-269页

作者： H Ahmad B nizamani M Z Samion n Yusoff M F ismail Photonics Research Centre Universiti Malaya50603 Kuala LumpurMalaysia Physics Department Faculty of ScienceUniversiti Malaya50603 Kuala LumpurMalaysia Distinguished Visiting Professor Universiti Kuala Lumpur British Malaysian Institute(UniKL BMI)Batu 8Jln Sungai Pusu53100SelangorMalaysia

We demonstrate antimonene as a saturable absorber(SA) to generate an ultrafast mode-locked and Q-switched laser in the 2 μm wavelength region. The two antimonene-based SAs were prepared and inserted separately in a thulium–holmiumdoped fiber laser to produce the pulsed laser. Antimonene was coated onto a tapered fiber to generate soliton mode-locked pulses and used in thin-film form for the generation of Q-switched pulses. The mode-locking was stable within a pump power of 267 m W–511 m W, and the laser operated at a central wavelength of 1897.4 nm. The mode-locked laser had a pulse width of 1.3 ps and a repetition rate of 12.6 MHz, with a signal-to-noise ratio of 64 d B. Q-switched laser operation was stable at a wavelength of 1890.1 nm within a pump power of 312 m W–381 m W. With the increase in pump power from 312 m W to 381 m W, the repetition rate increased to a maximum of 56.63 k Hz and the pulse width decreased to a minimum value of 2.85 μs. Wide-range tunability of the Q-switched laser was also realized within the wavelength range of1882 nm–1936 nm.

关键词： mode-locking Q-switched fiber laser optical saturable absorber

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Optically Modulated Tunable O-Band Praseodymium-Doped Fluoride Fiber Laser Utilizing Multi-Walled Carbon nanotube Saturable Absorber

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Chinese Physics Letters 2019年第10期36卷 32-35页

作者： H.Ahmad M.F.ismail S.n.Aidit Photonics Research Center University of MalayaKuala Lumpur 50603Malaysia Physics Department Faculty of ScienceUniversity of Malaya50603 Kuala LumpurMalaysia

A tunable and optically modulated fiber laser utilizing a multi-walled carbon nanotube based saturable absorber is demonstrated for operation in the O-band region.A praseodymium-doped fluoride fiber is used as the gain medium and the system is capable of generating modulated outputs at 1300 *** output is observed at pump powers of 511 mW and above,with repetition rates and pulse widths that can be tuned from 41 kHz and 3.4μs to 48 kHz and 2.4μs,respectively,at the maximum pump power available.A maximum average output power of 100μW with a corresponding single pulse energy of 2.1 nJ is measured,while the tunability of the proposed laser is from 1290 nm to 1308 *** output is stable,with peak power fluctuations of^4 dB from the average value.

关键词： pump fiber Optically

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Inclusion of CoTiO_(3) to ameliorate the re/dehydrogenation properties of the Mg–na–Al system

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Journal of Magnesium and Alloys 2024年第3期12卷 1215-1226页

作者： n.A.Ali n.Y.Yusnizam n.A.Sazelee Sami-ullah Rather Haizhen Liu M.ismail Energy Storage Research Group Faculty of Ocean Engineering TechnologyUniversiti Malaysia Terengganu21030 Kuala NerusTerengganuMalaysia Department of Chemical and Materials Engineering King Abdulaziz UniversityP.O.Box80204Jeddah 21589Saudi Arabia Guangxi novel Battery Materials Research Center of Engineering Technology School of Physical Science and TechnologyGuangxi UniversityNanning 530004China State Key Laboratory of Featured Metal Materials and Life-Cycle Safety for Composite Structures Nanning 530004China

For the first time,the MgH_(2)–naAlH_(4)(ratio 4:1)destabilized system with CoTiO_(3) addition has been *** CoTiO_(3)-doped MgH_(2)–naAlH_(4) sample begins to dehydrogenate at 130℃,which is declined by 40℃ compared to the undoped MgH_(2)–naAlH_(4).Moreover,the de/rehydrogenation kinetics characteristics of the CoTiO_(3)-doped MgH_(2)–naAlH_(4) were greatly *** the inclusion of CoTiO_(3),the MgH_(2)–naAlH_(4) composite absorbed 5.2 wt.%H_(2),higher than undoped MgH_(2)–naAlH_(4).In the context of dehydrogenation,the CoTiO_(3)-doped MgH_(2)–naAlH_(4) sample desorbed 2.6 wt.%H_(2),almost doubled compared to the amount of hydrogen desorbed from the undoped MgH_(2)–naAlH_(4) *** activation energy obtained by the Kissinger analysis for MgH_(2) decomposition was significantly lower by 35.9 kJ/mol than the undoped MgH_(2)–naAlH_(4) *** reaction mechanism demonstrated that new phases of MgCo and AlTi_(3) were generated in situ during the heating process and are likely to play a substantial catalytic function and be useful in ameliorating the de/rehydrogenation properties of the destabilized MgH_(2)–naAlH_(4) system with the inclusion of CoTiO_(3).

关键词： Destabilize system Magnesium hydride Sodium alanate Hydrogen storage Additive.

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