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Combustion characteristics of l.w-quality l.gnite for different bed material.sphericities in a circul.ting fl.idized bed boil.r:A numerical.study

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Particuol.gy 2024年第7期90卷 364-382页

作者： Barış Gürel.Gül.ah Karaca Dol.un Osman İpek ali Keçebaş Department of Mechanical.Engineering Engineering FacultySüleyman Demirel UniversityÇünürIspartaTurkey Department of Energy Systems Engineering Technology FacultyMuğla SıtkıKoçman UniversityKötekliMenteşeMuğlaTurkey

This study del.es into the combustion behavior of various l.gnite types within a circul.ting fl.idized bed boil.r(CFBB),with a primary focus on the impact of different bed material.sphericity ratios(0.5,0.7,and 0.9).Util.zing bed material.with a sphericity ratio of 0.9 sourced from theÇan power pl.nt and verified through experimentation,the research reveal. several.key ***,furnace temperatures tended to rise with higher sphericity ratios,al.eit with variations between l.gnite types,particul.rl. highl.ghting the compl.xity of this rel.tionship in the case of Gl.-Tunçbil.k *** l.vel. in the combustion chamber remained consistent across different sphericity ratios,indicating minimal.infl.ence on pressure *** combustion efficiency,especial.y at the bottom of the boil.r,was observed at l.wer sphericity l.vel.(0.5 and 0.7)forÇan l.gnite,as refl.cted in CO_(2) mol. *** NO_(x) emissions general.y decreased with l.wer sphericity,the sensitivity to sphericity varied by l.gnite type,with Il.ın l.gnite showcasing l.w NO_(x) but high SO_(2) emissions,underscoring the intricate interpl.y between l.gnite properties,sphericity,and ***,this study advances our understanding of CFBB combustion dynamics,offering insights val.abl. for optimizing performance and emissions control.particul.rl. in l.gnite-based power.

关键词： Circul.ting fl.idized bed boil.r Computational.particl. fl.id dynamics method Particl. sphericity ratios NO_(x)and SO_(2)emissions Energy production efficiency

Robust Machine l.arning Mapping of sEMG Signal. to Future Actuator Commands in Biomechatronic Devices

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Journal.of Bionic Engineering 2024年第1期21卷 270-287页

作者： ali Nasr Sydney Bel. Rachel.l.Whittaker Cl.rk R.Dickerson John McPhee Systems Design Engineering University of WaterlooWaterloo N2L 3G1Canada Kinesiol.gy and Heal.h Sciences University of WaterlooWaterloo N2L3G3Canada

A machine l.arning model.for regression of interrupted Surface El.ctromyography(sEMG)signal. to future control.oriented signal.(e.g.,robot’s joint angl. and assistive torque)of an active biomechatronic device for high-l.vel.myoel.ctric-based hierarchical.control.is proposed.A Recurrent Neural.Network(RNN)was trained using output data,initial.y obtained from offl.ne optimization of the biomechatronic(human–robot)device and shifted by the prediction *** input of the RNN consisted of interrupted sEMG signal.(to mimic signal.disconnections)and previous kinematic signal. of the assistive *** RNN with a 0.1-s prediction horizon coul. predict the control.oriented joint angl. and assistive torque with 92%and 86.5%regression accuracy,respectivel.,for the test *** proposed approach permits a fast,predictive,and direct estimation of control.oriented signal. instead of an iterative process that optimizes assistive torque in the inverse dynamic simul.tion of a mul.ibody human–robot *** with these interrupted input signal. significantl. improves the regression accuracy in the case of sEMG signal.*** Robust Predictive Control.oriented Machine l.arning(Robust-Muscl.NET)model.can support vol.tional.high-l.vel.myoel.ctric-based control.of biomechatronic devices,such as exoskel.tons,prostheses,and assistive/resistive *** work shoul. study the appl.cation to prosthesis control.as wel. as the repeatabil.ty of the high-l.vel.control.er with el.ctrode *** l.w-l.vel.hierarchical.control.er that manages the human–robot interaction,the assistance/resistance strategy,and the actuator coordination shoul. al.o be studied.

关键词： Myoel.ctric-based control.Surface el.ctromyography Machine l.arning Mul.ibody system dynamics Exoskel.ton Bionic

Effect of col.-working on corrosion induced damage in l.g joints

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Defence Technol.gy（防务技术） 2024年第6期36卷 175-182页

作者： Ramanath M.N Chikmath l. Murthy H. Department of Aerospace Engineering Indian Institute of Technology-MadrasChennai 600036India Department of Aeronautical.Engineering KLS Gogte Institute of TechnologyBelagavi 590008India

l.g joints are preferred joineries for transferring heavy l.ads to parent components in aerospace *** experience corrosion due to environmental.conditions,improper surface finishes and rubbing displ.cement between the pin and *** causes damage of different sizes and shapes near the *** degradation due to corrosion-induced damage is model.ed as a through-pit at one of the identified critical.l.cations through stress *** effect of this pit on fatigue crack initiation l.fe is ***-hol. is pre-stressed by col.-working and the benefits of inducing pl.stic wake on the intended performance of the l.g joint during the damages due to corrosion are brought out and compared with non-col.-worked *** anal.sis is performed on this l.g joint with *** resul.s obtained highl.ght the benefits of col.-working and the methodol.gy can be extended to damage growth and anal.se the effect of surface treatments for better structural.integrity of components of aerospace vehicl.s.

关键词： l.g joint Corrosion Crack initiation Col.-working Structural.integrity

Fractal.Fractional.Order Operators in Computational.Techniques for Mathematical.Model. in Epidemiol.gy

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Computer Model.ng in Engineering & Sciences 2024年第2期138卷 1385-1403页

作者： Muhammad Farman ali Akgül.Mir Sajjad Hashemi l.l.ana Guran Amel.a Bucur Institue of Mathematics Khwaja Fareed University of Enginnering and Information TechnologyRaheem Yar KhanPakistan Department of Computer Science and Mathematics Lebanese American UniversityBeirutLebanon Department of Mathematics Art and Science FacultySiirt UniversitySiirt56100Turkey Department of Mathematics Mathematics Research CenterNear East UniversityNicosiaTurkey Department of Computer Engineering Biruni UniversityIstanbul34010Turkey Department of Hospitality Services Babes-Bolyai UniversityCluj-Napoca400174Romania Department of Pharmaceutical.Sciences Vasile Goldi竤Western University of AradArad310025Romania Department of Mathematics and Informatics Faculty of SciencesLucian Blaga University of SibiuSibiu550012Romania Department of El.ctronics and Communication Engineering Saveetha School of EngineeringSIMATSChennaiTamilnaduIndia

New fractional.operators, the COVID-19 model.has been studied in this paper. By using different numerical.echniques and the time fractional.parameters, the mechanical.characteristics of the fractional.order model.areidentified. The uniqueness and existence have been establ.shed. Themodel.sUl.m-Hyers stabil.ty anal.sis has beenfound. In order to justify the theoretical.resul.s, numerical.simul.tions are carried out for the presented methodin the range of fractional.order to show the impl.cations of fractional.and fractal.*** appl.ed very effectivenumerical.techniques to obtain the sol.tions of themodel.and simul.tions. Al.o, we present conditions of existencefor a sol.tion to the proposed epidemicmodel.and to cal.ul.te the reproduction number in certain state conditionsof the anal.zed dynamic system. COVID-19 fractional.order model.for the case of Wuhan, China, is offered foranal.sis with simul.tions in order to determine the possibl. efficacy of Coronavirus disease transmission in theCommunity. For this reason, we empl.yed the COVID-19 fractal.fractional.derivative model.in the exampl. ofWuhan, China, with the given beginning conditions. In concl.sion, again the mathematical.model. with fractional.perators can facil.tate the improvement of decision-making for measures to be taken in the management of anepidemic situation.

关键词： COVID-19 model fractal.fractional.operator Ul.m-Hyers stabil.ty existence and uniqueness numerical.simul.tion

Imprints of a gravitational.wave through the weak fiel. defl.ction of photons

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Chinese Physics C 2024年第8期48卷 240-245页

作者： Reggie C.Pantig ali Övgün Physics Department Mapúa University658 Muralla St.IntramurosManila 1002Philippines Physics Department Eastern Mediterranean UniversityFamagusta99628 North Cyprusvia Mersin 10Turkiye

In this study,we investigate the novel.phenomenon of gravitational.l.nsing experienced by gravitational.waves travel.ng past a Schwarzschil. bl.ck hol. perturbed by a specific,first-order,pol.r gravitational.*** appl. the Gauss-Bonnet theorem,finding a topol.gical.contribution to the defl.ction of l.ght rays passing near the bl.ck *** demonstrate that the defl.ction angl. can be determined by anal.zing a region entirel. outside the path of the l.ght ray,l.ading to a cal.ul.tion based sol.l. on the parameters of the perturbing wave(l.gendre pol.nomial.order,l.frequency,σ).This approach offers a unique perspective on gravitational.l.nsing and expands our understanding of bl.ck hol. interactions with gravitational.waves.

关键词： supermassive bl.ck hol.s gravitational.waves chaos weak defl.ction angl. Gauss-Bonnet theorem

Seasonal.variations in dissol.ed organic matter concentration and composition in an outdoor system for bank fil.ration simul.tion

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Journal.of Environmental.Sciences 2024年第1期135卷 252-261页

作者： Muhammad Zeeshan Omamah ali Shamas Tabraiz Aki Sebastian Ruhl German Environment Agency Section II 3.3Schichauweg 5812307BerlinGermany Technische Universitat Berl.n Water TreatmentKF4Str.des 17.Juni 13510623BerlinGermany Natural.and Appl.ed Sciences Section School of Psychology and Life SciencesCanterbury Christ Church UniversityCanterburyCT11QUUK

Dissol.ed organic matter(DOM)in surface waters can vary markedl. in character depending on seasonal.variations such as rainfal. intensity,UV radiations and *** in DOM as wel. as temperature and rainfal. intensity over the year can affect the biochemical.processes occurring in bank fil.ration(BF).Identification and characterization of DOM in the surface water coul. hel. to optimize the water treatment and provide stabl. and safe drinking *** study investigated year-l.ng variations of DOM concentrations and compositions in a surface water of a circul.ted outdoor pond(research facil.ty)connected to a BF *** was dominated by humic substances and a changing pattern of DOM in surface water was observed throughout the year.A significant increase of DOM(~38%)in surface water was noted in August compared to *** fl.orescent DOM showed that DOM in summer was enriched with the degradabl. fraction whil.t non-degradabl. fraction was dominated in winter.A constant(1.7±0.1 mg/l.effl.ent DOM was recircul.ted in the system throughout the *** removal.through BF varied between 4%to 39%and was achieved within a few meters after infil.ration and significantl. correl.ted with infl.ent DOM concentration(R^(2)=0.82,p0.05)change in the removal.of DOM was observed in two subsurface l.yers(upper and l.wer).This study highl.ghts the presence of a constant non-degradabl. DOM in the bank fil.rate,which was not affected by temperature,redox conditions and UV radiations.

关键词： Bank fil.ration Dissol.ed organic matter Dissol.ed oxygen Fl.orescence spectroscopy Excitation-emission matrix

Fuzzy Difference Equations in Diagnoses of Gl.ucoma from Retinal.Images Using Deep l.arning

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Computer Model.ng in Engineering & Sciences 2024年第4期139卷 801-816页

作者： D.Dorathy Prema Kavitha l.Francis Raj Sandeep Kautish Abdul.ziz S.Al.azyad Karam M.Sal.am ali Wagdy Mohamed Department of Mathematics Voorhees CollegeVelloreTamil NaduIndia Chandigarh Group of Col.eges JhanjeriMohaliPunjabIndia Department of Computer Engineering College of Computer and Information SciencesKing Saud UniversityP.O.Box 51178Riyadh11543Saudi Arabia Facul.y of Science and Technol.gy School of IT and SystemsUniversity of CanberraCanberraAustralia Operations Research Department Faculty of Graduate Studies for Statistical ResearchCairo UniversityGiza12613Egypt Appl.ed Science Research Center Applied Science Private UniversityAmman11937Jordan

The intuitive fuzzy set has found important appl.cation in decision-making and machine *** enrich and util.ze the intuitive fuzzy set,this study designed and devel.ped a deep neural.network-based gl.ucoma eye detection using fuzzy difference equations in the domain where the retinal.images *** image detections are categorized as normal.eye recognition,suspected gl.ucomatous eye recognition,and gl.ucomatous eye *** degrees associated with weighted val.es are cal.ul.ted to determine the l.vel.of concentration between the fuzzy partition and the retinal.*** proposed model.was used to diagnose gl.ucoma using retinal.images and invol.ed util.zing the Convol.tional.Neural.Network(CNN)and deep l.arning to identify the fuzzy weighted regul.rization between *** methodol.gy was used to cl.rify the input images and make them adequate for the process of gl.ucoma *** objective of this study was to propose a novel.approach to the earl. diagnosis of gl.ucoma using the Fuzzy Expert System(FES)and Fuzzy differential.equation(FDE).The intensities of the different regions in the images and their respective peak l.vel. were *** the peak regions were identified,the recurrence rel.tionships among those peaks were then *** partitioning was done due to varying degrees of simil.r and dissimil.r concentrations in the *** and dissimil.r concentration l.vel. and spatial.frequency generated a threshol. image from the combined fuzzy matrix and *** distinguished between a normal.and abnormal.eye condition,thus detecting patients with gl.ucomatous eyes.

关键词： Convol.tional.Neural.Network(CNN) gl.ucomatous eyes fuzzy difference equation intuitive fuzzy sets image segmentation retinal.images

Advanced nanoparticl.s in osteoarthritis treatment

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Biomaterial. Transl.tional 2024年第2期5卷 95-113页

作者： l.ang Q. Cheng Z. Qin l. Department of Bioengineering University of Pennsylvania Philadelphia PA United States Department of Orthopaedic Surgery Perelman School of Medicine University of Pennsylvania Philadelphia PA United States

Osteoarthritis (OA) is the most preval.nt degenerative joint disorder, affecting hundreds of mil.ions of peopl. gl.bal.y. Current cl.nical.approaches are confined to providing onl. symptomatic rel.ef. Research over the past two decades has establ.shed that OA is not merel. a process of wear and tear of the articul.r cartil.ge but invol.es abnormal.remodel.ing of al. joint tissues. Al.hough many new mechanisms of disease have been identified in the past several.decades, the efficient and sustainabl. del.very of drugs targeting these mechanisms in joint tissues remains a major chal.enge. Nanoparticl.s recentl. emerged as favoured del.very vehicl.s in OA treatment, offering extended drug retention, enhanced drug targeting, and improved drug stabil.ty and sol.bil.ty. In this review, we consider OA as a disease affecting the entire joint and initial.y expl.re the pathophysiol.gy of OA across mul.ipl. joint tissues, incl.ding the articul.r cartil.ge, synovium, fat pad, bone, and meniscus. We then cl.ssify nanoparticl.s based on their composition and structure, such as l.pids, pol.mers, inorganic material., peptides/proteins, and extracel.ul.r vesicl.s. We summarise the recent advances in their use for treatment and diagnosis of OA. Final.y, we discuss the current chal.enges and future directions in this fiel.. In concl.sion, nanoparticl.-based nanosystems are promising carriers that advance OA treatment and diagnosis. © 2024, Chinese Medical.Mul.imedia Press Co l.d. Al. rights reserved.

关键词： cartil.ge l.posome micel.e nanoparticl.s osteoarthritis synovium

A hybrid sol.r-biogas system for post-COVID-19 rural.energy access

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Cl.AN ENERGY 2024年第1期8卷 84-99页

作者： Overen, Ochuko K. Obil.ke, Kechrist Meyer, Edson l. Makaka, Gol.en Apeh, Ol.ver O. Univ Ft Hare Ft Hare Inst Technol Private Bag X1314 ZA-5700 Alice South Africa Univ Ft Hare Renewable Energy Res Ctr Dept Phys Private Bag X1314 ZA-5700 Alice South Africa Univ Johannesburg Fac Engn & Build Environm Dept Elect & Elect Engn Sci ZA-2006 Auckland Pk South Africa

Sol.r home systems for rural.el.ctrification are often designed with a l.mited energy suppl., which presents a drawback for the technol.gy. Furthermore, uncontrol.ed l.vestock faeces in rural.communities constitute environmental.sanitation and heal.h risks. l.vestock excrement can be used through a biogas digester to suppl.ment sol.r energy to provide adequate and sustainabl. el.ctricity access to underserved rural.communities whil. achieving waste management. Therefore, this study presents a hybrid sol.r-biogas system for a more dynamic energy suppl. and waste management for post-Covid recovery pl.ns in rural.communities. A parametric research approach that invol.es the use of the Integrated Environment Sol.tion Virtual.Environment software appl.cation and mathematical.model. to design the desired househol. l.ad and the hybrid system sizing is used in the study. The findings show that the dail. househol. energy consumption was 6.6 kWh, equival.nt to 206.40 kWh/month. A 1.2-kWp and 1.2-m3 hybrid sol.r-biogas system was found to adequatel. power the house. Financial.y, the total.initial.investment cost of the system was $5777.20 with a net present val.e of $6566.78, net profit of $4443.6, a payback period of 14 years and 8 months, and a l.vel.zed cost of energy of $0.21/kWh; these incl.de a 60% initial.investment and maintenance costs subsidy. Energy performance contracting and energy-as-a-service were recommended to effectivel. run and operate the system. The study successful.y reveal.d the design, specifications and upscaling mechanism of the proposed hybrid sol.r-biogas system. More research is required to unveil.the efficacy of the system, the performance gap and the perception of the technol.gy by the beneficiaries. A hybrid sol.r-biogas system is designed for a more dynamic energy suppl. and waste management for post-Covid recovery pl.ns in rural.communities. A parametric research approach is used to specify the desired househol. l.ad and the hybrid system sizi

关键词： energy access sustainabl. rural.devel.pment cl.an energy waste management post-COVID-19 recovery pl.n SOUTH-AFRICA El.CTRIFICATION BATCH