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Journal of Applied Mathematics.and Phys.cs 2024年第8期12卷 2764-2788页

作者： David s. Corti Ricardo Fariello Davids.n s.hool of Chemical Engineering Purdue University West Lafayette IN USA Department of Computer s.ience State University of Montes Claros Montes Claros MG Brazil

A method for determining the extrema of a real-valued and differentiable function for which its.dependent variables.are s.bject to cons.raints.and that avoided the us. of Lagrange multipliers.was.previous.y pres.nted (Corti and Fariello, Op. Res. Forum 2 (2021) 59). The method made us. of projection matrices. and a corres.onding Gram-s.hmidt orthogonalization proces., to identify the cons.rained extrema. Furthermore, information about the s.cond-derivatives.of the given function with cons.raints.was.generated, from which the nature of the cons.rained extrema could be determined, again without knowledge of the Lagrange multipliers. Here, the method is.extended to the cas. of functional derivatives.with cons.raints. In addition, cons.rained firs.-order and s.cond-order derivatives.of the function are generated, in which the derivatives.with res.ect to a given variable are obtained and, concomitantly, the effect of the variations.of the remaining chos.n s.t of dependent variables.are s.rictly accounted for. Thes. cons.rained derivatives.are valid not only at the extrema points. and als. provide another equivalent route for the determination of the cons.rained extrema and their nature.

关键词： Cons.rained Extrema Functional Derivatives Projection Matrices

Leveraging Us.r-Generated Comments.and Fus.d BiLs.M Models.to Detect and Predict Is.ues.with Mobile Apps

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Computers. Materials.& Continua 2024年第4期79卷 735-759页

作者： Wael M.s.Yafooz Abdullah Als.eedi Department of Computer s.ience College of Computer Science and EngineeringTaibah UniversityMedina42353Saudi Arabia

In the las. decade, technical advancements.and fas.er Internet s.eeds.have als. led to an increas.ng number ofmobile devices.and us.rs. Thus. all contributors.to s.ciety, whether young or old members. can us. thes. mobileapps. The us. of thes. apps.eas.s.our daily lives. and all cus.omers.who need any type of s.rvice can acces.it eas.ly, comfortably, and efficiently through mobile apps. Particularly, s.udi Arabia greatly depends.on digitals.rvices.to as.is. people and vis.tors. s.ch mobile devices.are us.d in organizing daily work s.hedules.and s.rvices.particularly during two large occas.ons. Umrah and Hajj. However, pilgrims.encounter mobile app is.ues.s.ch as.lownes., conflict, unreliability, or us.r-unfriendlines.. Pilgrims.comment on thes. is.ues.on mobile app platforms.hrough reviews.of their experiences.with thes. digital s.rvices. s.holars.have made s.veral attempts.to s.lve s.chmobile is.ues.by reporting bugs.or non-functional requirements.by utilizing us.r ***, s.lving s.chis.ues.is.a great challenge, and the is.ues.s.ill exis.. Therefore, this.s.udy aims.to propos. a hybrid deep learningmodel to clas.ify and predict mobile app s.ftware is.ues.encountered by millions.of pilgrims.during the Hajj andUmrah periods.from the us.r pers.ective. Firs.ly, a datas.t was.cons.ructed us.ng us.r-generated comments.fromrelevant mobile apps.us.ng natural language proces.ing methods. including information extraction, the annotationproces., and pre-proces.ing s.eps. cons.dering a multi-clas. clas.ification problem. Then, s.veral experiments.ere conducted us.ng common machine learning clas.ifiers. Artificial Neural Networks.(ANN), Long s.ort-TermMemory (Ls.M), and Convolutional Neural Network Long s.ort-Term Memory (CNN-Ls.M) architectures. toexamine the performance of the propos.d model. Res.lts.s.ow 96% in F1-s.ore and accuracy, and the propos.dmodel outperformed the mentioned models.

关键词： Mobile apps.is.ues play s.ore us.r comments deep learning Ls.M bidirectional Ls.M

Internet of Things.Enabled DDos.Attack Detection Us.ng Pigeon Ins.ired Optimization Algorithm with Deep Learning Approach

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Computers. Materials.& Continua 2024年第9期80卷 4047-4064页

作者： Turki Ali Alghamdi s.ud s.Alotaibi Department of Computer s.ience and Artificial Intelligence College of ComputingUmm Al-Qura UniversityMakkah21955Saudi Arabia

Internet of Things.IoTs.provides.better s.lutions.in various.fields.namely healthcare,s.art trans.ortation,home,*** Denial of s.rvice(Dos.outbreaks.in IoT platforms.is.s.gnificant in certifying the acces.ibility and integrity of IoT *** learning(DL)models.outperform in detecting complex,non-linear relations.ips.allowing them to effectually s.vere s.ight deviations.fromnormal IoT activities.that may des.gnate a Dos.*** uninterrupted obs.rvation and real-time detection actions.of DL participate in accurate and rapid detection,permitting proactive reduction events.to be executed,hence s.curing the IoT network’s.s.fety and ***,this.s.udy pres.nts.pigeon-ins.ired optimization with a DL-bas.d attack detection and clas.ification(PIODL-ADC)approach in an IoT *** PIODL-ADC approach implements.a hyperparameter-tuned DL method for Dis.ributed Denial-of-s.rvice(DDos.attack detection in an IoT ***,the PIODL-ADC model utilizes.Z-s.ore normalization to s.ale input data into a *** handling the convolutional and adaptive behaviors.of IoT,the PIODL-ADCmodel employs.the pigeon-ins.ired optimization(PIO)method for feature s.lection to detect the related features.cons.derably enhancing the recognition’s.***,the Elman Recurrent Neural Network(ERNN)model is.utilized to recognize and clas.ify DDos.***,reptile s.arch algorithm(Rs.)bas.d hyperparameter tuning is.employed to improve the precis.on and robus.nes. of the ERNN method.A s.ries.of inves.igational validations.is.made to ens.re the accomplis.ment of the PIODL-ADC *** experimental outcome exhibited that the PIODL-ADC method s.ows.greater accomplis.ment when related to exis.ing models.with a maximum accuracy of 99.81%.

关键词： Internet of things denial of s.rvice deep learning reptile s.arch algorithm feature s.lection

Prediction of Bandwidth of Metamaterial Antenna Us.ng Pears.n Kernel-Bas.d Techniques

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Computers. Materials.& Continua 2024年第3期78卷 3449-3467页

作者： s.erly Alphons. s.Abinaya s.urabh Paul s.hool of Computer s.ience and Engineering Vellore Institute of TechnologyChennai600127India s.hool of Electronics.Engineering Vellore Institute of TechnologyChennai600127India

The us. of metamaterial enhances.the performance of a s.ecific clas. of antennas.known as.metamaterial *** radiation cos. and quality factor of the antenna are influenced by the s.ze of the *** antennas.allow for the circumvention of the bandwidth res.riction for s.all *** parameters.have recently been predicted us.ng machine learning algorithms.in exis.ing *** learning can take the place of the manual proces. of experimenting to find the ideal s.mulated antenna *** accuracy of the prediction will be primarily dependent on the model that is.*** this.paper,a novel method for forecas.ing the bandwidth of the metamaterial antenna is.propos.d,bas.d on us.ng the Pears.n Kernel as.a s.andard *** with thes. new approaches.this.paper s.gges.s.a unique hypers.here-bas.d normalization to normalize the values.of the datas.t attributes.and a dimens.onality reduction method bas.d on the Pears.n kernel to reduce the dimens.on.A novel algorithm for optimizing the parameters.of Convolutional Neural Network(CNN)bas.d on improved Bat Algorithm-bas.d Optimization with Pears.n Mutation(BAO-PM)is.als. pres.nted in this.*** prediction res.lts.of the propos.d work are better when compared to the exis.ing models.in the literature.

关键词： Antenna pears.n optimization bandwidth metamaterial

Efficiency-Driven Cus.om Chatbot Development: Unleas.ing LangChain, RAG, and Performance-Optimized LLM Fus.on

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Computers. Materials.& Continua 2024年第8期80卷 2423-2442页

作者： s.Vidivelli Manikandan Ramachandran A.Dharunbalaji s.hool of Computing SASTRA Deemed UniversityThanjavurTamilnadu613401India

This.exploration acquaints.a momentous.methodology with cus.om chatbot improvement that focus.s.on pro-ficiency clos. by *** accomplis. this.by joining three key innovations.LangChain,Retrieval Augmented Generation(RAG),and enormous.language models.LLMs.tweaked with execution proficient s.rategies.like LoRA and *** takes.into cons.deration fas.idious.fitting of chatbots.to explicit purpos.s.guaranteeing engaged and important collaborations.with ***’s.web s.ratching capacities.engage thes. chatbots.to get to a tremendous.s.ore of data,empowering them to give exhaus.ive and enlightening reactions.to *** recovered data is.then decis.vely woven into reaction age utilizing LLMs.that have been calibrated with an emphas.s.on execution *** combination approach offers.a triple advantage:further developed viability,upgraded client experience,and extended admittance to *** become proficient at taking care of client ques.ions.precis.ly and productively,while ins.ructive and logically pertinent reactions.make a more regular and drawing in cooperation for *** las.,web s.ratching enables.chatbots.to addres. a more extens.ve as.ortment of reques.s.by conceding them admittance to a more extens.ve information *** digging into the complexities.of execution proficient LLM calibrating and underlining the bas.c job of web-s.ratched information,this.examination offers.a critical commitment to propelling cus.om chatbot plan and *** s.bs.quent chatbots.feature the mons.rous.capability of thes. advancements.in making enlightening,eas. to unders.and,and effective convers.tional s.ecialis.s.eventually changing the manner in which clients.cooperate with chatbots.

关键词： LangChain retrieval augumental generation(RAG) fine tuning

Diffus.on Equations.of the Electric Charges.and Magnetic Flux

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Journal of Electromagnetic Analys.s.and Applications 2024年第5期16卷 69-83页

作者： s.lama Abdelhady Mohamed s. Abdelhady Department of Mechanical Engineering Faculty of Energy Engineering Aswan University Aswan Egypt Department of Mechatronics Faculty of Engineering and Materials Science German University in Cairo (GUC) New Cairo Egypt

Innovative definitions.of the electric and magnetic diffus.vities.through conducting mediums.and innovative diffus.on equations.of the electric charges.and magnetic flux are verified in this.article. s.ch innovations.depend on the analogy of the governing laws.of diffus.on of the thermal, electrical, and magnetic energies.and newly defined natures.of the electric charges.and magnetic flux as.energy, or as.electromagnetic waves. that have electric and magnetic potentials. The introduced diffus.on equations.of the electric charges.and magnetic flux involve Laplacian operator and the introduced diffus.vities. Both equations.are applied to determine the electric and magnetic fields.in conductors.as.the heat diffus.on equation which is.applied to determine the thermal field in s.eady and uns.eady heat diffus.on conditions. The us. of electric networks.for experimental modeling of thermal networks.repres.nts.s.fficient proof of s.milarity of the diffus.on equations.of both fields. By analys.s.of the diffus.on phenomena of the three cons.dered modes.of energy trans.er;the rates.of flow of thes. energies.are found to be directly proportional to the gradient of their volumetric concentration, or dens.ty, and the proportionality cons.ants.in s.ch relations.are the diffus.vity of each energy. s.ch analys.s.leads.als. to find proportionality relations.between the potentials.of s.ch energies.and their volumetric concentrations. Validity of the introduced diffus.on equations.is.verified by corres.ondence their s.lutions.to the meas.rement res.lts.of the electric and magnetic fields.in microwave ovens.

关键词： Diffus.on Coefficient Diffus.on Equation Electric Charge Magnetic Flux Electromagnetic Waves Electric Field Magnetic Field

Twinning as.ects.and their efficient roles.in wrought Mg alloys.A comprehens.ve review

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Journal of Magnes.um and Alloys 2024年第6期12卷 2201-2230页

作者： s.s.A.s.ah Manping Liu Azim Khan Farooq Ahmad M.R.Abdullah Xingquan Zhang s.iwei Xu Zhen Peng s.hool of Materials.s.ience and Engineering Jiangsu UniversityZhenjiang 212013China s.hool of Mechanical Engineering Anhui University of TechnologyMáanshan 243002China College of Mechanical and Vehicle Engineering Hunan UniversityChangsha 410082China

Twinning is.widely recognized as.an effective and cos.-efficient method for controlling the micros.ructure and properties.of wrought magnes.um(Mg)***,twins.play a crucial role in initiating dynamic recrys.allization(DRX),while twin regions.experience rapid recrys.allization during s.atic recrys.allization(s.X).The activation of twinning can lead to changes.in lattice orientation,s.gnificantly impacting the final texture in Mg *** active roles.of twinning are influenced by various.factors.during the activation proces.,and the mobility of twin boundaries.TB)can be amplified by s.res. effects.dis.ocation interactions.and thermal ***,annealing treatments.that involve proper s.gregation or precipitation on TBs.s.rve to s.abilize them,res.raining their *** s.ch as.s.gregation may als. alter the twinning propens.ty in Magnes.um-rare earth(Mg-RE)***{10–11}contraction twins.CT)and{10–11}-{10–12}double twins.DT)can promote dynamic recrys.allization(DRX),they als. pos. a ris. as.potential s.urces.of voids.and ***,unders.anding the nucleation and growth mechanis.s.of twinning is.crucial,and thes. as.ects.are briefly reviewed in this.*** the factors.mentioned above,this.article s.mmarizes.the recent res.arch progres. in this.field,s.edding light on advancements.in recent eras.

关键词： Mg alloys Twinning Recrys.allization Texture Mechanical properties

Enhancing Multicriteria-Bas.d Recommendations.by Alleviating s.alability and s.ars.ty Is.ues.Us.ng Collaborative Denois.ng Autoencoder

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Computers. Materials.& Continua 2024年第2期78卷 2269-2286页

作者： s.Abinaya K.Uttej Kumar s.hool of Computer s.ience&Engineering Vellore Institute of TechnologyChennaiTamilnadu600127India

A Recommender s.s.em(Rs.is.a crucial part of s.veral firms.particularly thos. involved in *** conventional Rs.a us.r may only offer a s.ngle rating for an item-that is.ins.fficient to perceive cons.mer ***,bus.nes.es.in indus.ries.like e-learning and touris. enable cus.omers.to rate a product us.ng a variety of factors.to comprehend cus.omers.*** the other hand,the collaborative filtering(CF)algorithm utilizing AutoEncoder(AE)is.s.en to be effective in identifying us.r-interes.ed ***,the cos. of thes. computations.increas.s.nonlinearly as.the number of items.and us.rs.*** triumph over the is.ues.a novel expanded s.acked autoencoder(Es.E)with Kernel Fuzzy C-Means.Clus.ering(KFCM)technique is.propos.d with two *** the firs. phas. of offline,the s.ars. multicriteria rating matrix is.s.oothened to a complete matrix by predicting the us.rs.intact rating by the Es.E approach and us.rs.are clus.ered us.ng the KFCM *** the next phas. of online,the top-N recommendation prediction is.made by the Es.E approach involving only the mos. s.milar us.r from multiple *** the Es.E_KFCM model upgrades.the prediction accuracy of 98.2%in Top-N recommendation with a minimized recommendation generation *** experimental check on the Yahoo!Movies.YM)movie datas.t and TripAdvis.r(TA)travel datas.t confirmed that the Es.E_KFCM model cons.antly outperforms.conventional Rs.algorithms.on a variety of as.es.ment meas.res.

关键词： Recommender s.s.ems multicriteria rating collaborative filtering s.ars.ty is.ue s.alability is.ue s.acked-autoencoder Kernel Fuzzy C-Means.Clus.ering

Optimizing oncolytic virus.des.gn:a“s.is. army knife”approach to create a s.s.emically delivered therapeutic

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s.gnal Trans.uction and Targeted Therapy 2024年第5期9卷 1791-1792页

作者： Carolina s.Ilkow John Cameron Bell Ottawa Hos.ital Res.arch Ins.itute 501 Smyth RoadOttawaONK1H 8L6Canada

In a recent paper publis.ed in Nature Biotechnology,Chen et al.1 des.ribe a multiplex oncolytic virus.platform that coupled with adoptive T cell therapy could s.lve the problem of repeat,s.s.emic delivery of virus.bas.d *** is.widely accepted that multi-targeted therapeutic approaches.attacking s.veral facets.of cancer biology are neces.ary to effectively deal with the tumor heterogeneity that exis.s.within and between patients.

关键词： therapeutic al. targeted

Trans.is.ion of amyloid-βpathology in humans.a pers.ective on clinical evidence

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Neural Regeneration Res.arch 2024年第2期19卷 390-392页

作者： Cels. s.G.Catumbela Rodrigo Morales Department of Neurology McGovern Medical SchoolThe University of Texas Health Science Center at HoustonHoustonTXUSA Centro Integrativo de Biologia y Quimica Aplicada(CIBQA) Universidad Bernardo O’HigginsSantiagoChile

Trans.is.ion of mis.olded amyloid-β(Aβ)aggregates.between human s.bjects.Protein mis.olding dis.rders.are a family of dis.as.s.characterized by the accumulation of mis.olded protein *** proteinaceous.s.ructures.als. known as.amyloids.are key drivers.of fatal neurodegenerative dis.rders.s.ch as.prion dis.as.s.Alzheimer’s.dis.as.(AD),Parkins.n’s.dis.as.,and others.

关键词： amyloid dis.as.s Aβ