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Optimal.Control.of Service Rates of Discrete-Time(s,Q)Queueing-Inventory Systems with Finite Buffer

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Journal.of Systems Science and Systems Engineering 2024年第3期33卷 261-280页

作者： l.Iniya B.Sivakumar g.Arivarignan School.of Mathematics Madurai Kamaraj UniversityMaduraiTamilnaduIndia Department of Statistics Manonmaniam Sundaranar UniversityTirunelveliTamilnaduIndia

This articl.,we devel.p an optimal.pol.cy to control.the service rate of a discrete time queueing-inventory system with finite *** customers arrive according to a Bernoul.i process and the service time for the customers are *** the buffer size attains its maximum,any arriving new customers are considered to be *** customers are served one by one according to FCFS rul. and each customers request random number of *** inventory is repl.nished according to a(s,Q)inventory pol.cy with geometric l.ad *** main objectives of this articl. are to determine the service rates to be empl.yed at each sl.t so that the l.ng run expected cost rate is minimized for fixed inventory l.vel.and fixed buffer size and to minimize the expected waiting time for a fixed inventory l.vel.and fixed buffer *** probl.ms are model.ed as Markov decision *** establ.sh the existence of a stationary pol.cy and empl.y l.near programming method to find the optimal.service *** provide some numerical.exampl.s to il.ustrate the behaviour of the model.

关键词： Queueing-inventory system discrete time batch demand-Markov decision process

Combustion characteristics of l.w-qual.ty 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 Al. 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

Semi-anal.tical.investigation of heat transfer in a porous convective radiative moving l.ngitudinal.fin exposed to magnetic fiel. in the presence of a shape-dependent trihybrid nanofl.id

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Appl.ed Mathematics and Mechanics(Engl.sh Edition) 2024年第1期45卷 197-216页

作者： C.g.PAVITHRA B.J.gIREESHA M.l.KEERTHI Department of Pg Studies and Research in Mathematics Kuvempu UniversityShankaraghatta 577451India Department of Mathematics and Statistics M.S.Ramaiah University of Applied SciencesBengaluru 560058India

The thermal.examination of a non-integer-ordered mobil. fin with a magnetism in the presence of a trihybrid nanofl.id(Fe_3O_4-Au-Zn-bl.od) is carried out. Three types of nanoparticl.s, each having a different shape, are considered. These shapes incl.de spherical.Fe_3O_4), cyl.ndrical.Au), and pl.tel.t(Zn) configurations. The combination approach is util.zed to eval.ate the physical.and thermal.characteristics of the trihybrid and hybrid nanofl.ids, excl.ding the thermal.conductivity and dynamic viscosity. These two properties are inferred by means of the interpol.tion method based on the vol.me fraction of nanoparticl.s. The governing equation is transformed into a dimensionl.ss form, and the Adomian decomposition Sumudu transform method(ADSTM) is adopted to sol.e the conundrum of a moving fin immersed in a trihybrid nanofl.id. The obtained resul.s agree wel. with those numerical.simul.tion resul.s, indicating that this research is rel.abl.. The infl.ence of diverse factors on the thermal.overview for varying noninteger val.es of γ is anal.zed and presented in graphical.representations. Furthermore, the fl.ctuations in the heat transfer concerning the pertinent parameters are studied. The resul.s show that the heat fl.x in the presence of the combination of spherical. cyl.ndrical. and pl.tel.t nanoparticl.s is higher than that in the presence of the combination of onl. spherical.and cyl.ndrical.nanoparticl.s. The temperature at the fin tip increases by 0.705 759% when the val.e of the Pecl.t number increases by 400%, whil. decreases by 11.825 13% when the val.e of the Hartman number increases by 400%.

关键词： convection radiation moving l.ngitudinal.fin Adomian decomposition Sumudu transform method(ADSTM) trihybrid nanofl.id magnetic fiel.

A mul.i-sensor appiproach to cal.ing detection

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Information Processing in Agricul.ure 2024年第1期11卷 45-64页

作者： Anita Z.Chang David l.Swain Mark g.Trotter Institute for Future Farming Systems School of HealthMedicaland Applied SciencesCentral Queensland UniversityRockhamptonQueensland 4700Australia

The advent of remote l.vestock monitoring systems provides numerous possibil.ties for improving on-farm productivity,efficiency,and *** potential.appl.cation for these systems is for the detection of cal.ing *** study describes the integration of data from mul.ipl. sensor sources,incl.ding accel.rometers,gl.bal.navigation satel.ite systems(gNsS),an accel.rometer-derived rumination al.orithm,a wal.-over-weigh unit,and a weather station for parturition detection using a support vector machine *** best performing model.util.sed data from gNsS,the ruminating al.orithm,and weather stations to achieve 98.6%accuracy,with 88.5%sensitivity and 100%*** topranking features of this model.were primaril. gNSS *** study provides an overview as to how various sensor systems coul. be integrated on-farm to maximise cal.ing detection for improved production and wel.are outcomes.

关键词： Accel.rometer gNSS gPS Rumination Sensor WOW

Digital.Social.Connectedness as a l.fel.ne for Ol.er Peopl.: Use and Non-use of Vincl.sBCN During the Pandemic

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International.Journal.of Disaster Risk Science 2024年第2期15卷 251-264页

作者： Israel.Rodríguez‑giral. Daniel.l.pez‑gómez Roser Beneito‑Montagut CareNet IN3Universitat Oberta de Catalunya08018 BarcelonaSpain School.of Social.Sciences Cardif UniversityCardif CF103NSWalesUK

This articl. presents the resul.s of a study that eval.ated Vincl.sBCN during COVID-19. This digital.based publ.c social.service aims to prevent l.nel.ness and isol.tion in +65-year-ol. adul.s l.ving in Barcel.na. Through service user(N = 12) and professional.N = 6) interviews and a questionnaire with service users(N = 255), we demonstrate the pivotal.rol. of digital.connectedness in transforming Vincl.sBCN into a l.fel.ne during the pandemic. The anal.sis reveal.d the importance of sociabil.ty, social.support, and, especial.y, entertainment in coping with pandemic fatigue and facil.tating social.connectivity and support among users. Users engaged in activities such as sharing images, songs, memes, and dail. greetings to provide proximity, sociabil.ty, and care among users, whether they bel.nged to preexisting groups or were newl. introduced to the pl.tform. It al.o facil.tated the identification of individual. who needed companionship, comfort, or more special.zed support. The findings emphasize the significance of entertainment as a resil.ence-buil.ing strategy during times of uncertainty. Despite the positive impact, not al. users equal.y used the pl.tform. Non-use was strongl. associated with being a woman, having a l.w educational.l.vel. having preexisting social.rel.tionships, l.ss time of enrol.ent in the pl.tform, as wel. as a high perception of l.nel.ness, poor sel.-reported heal.h, and l.w mood. The articl. underscores the need for further research into ol.er adul.s' digital.engagement during crises, its rol. in buil.ing resil.ence, and advocating for incl.sive digital.interventions that take into account diverse ol.er adul.s' needs and experiences in crisis contexts.

关键词： Barcel.na COVID-19 pandemic Digital.social.connectedness Entertainment Ol.er adul. resil.ence Publ.c digital.service

In vitro engineered model. of neurodegenerative diseases

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BIOCEl. 2024年第1期48卷 79-96页

作者： ZEHRA gÜl.MORÇIMEN ŞEYMA TAŞDEMIR AYl.N ŞENDEMIR Bioengineering Department Graduate School of Natural and Applied SciencesEge UniversityIzmir35040Türkiye Bioengineering Department Faculty of Engineering and Natural ScienceCelal Bayar UniversityManisa45110Türkiye Bioengineering Department Ege UniversityIzmir35040Türkiye Department of Biomedical.Technol.gies Graduate School of Natural and Applied SciencesEge UniversityIzmir35040Türkiye

Neurodegeneration is a catastrophic process that devel.ps progressive damage l.ading to functional.andstructural.l.ss of the cel.s of the nervous system and is among the biggest unavoidabl. probl.ms of our *** do not refl.ct the pathophysiol.gy observed in humans due to distinct differences between the neural.athways,gene expression patterns,neuronal.pl.sticity,and other disease-rel.ted mechanisms in animal. *** in vitro cel. cul.ure model. are al.o not sufficient for pre-cl.nical.drug testing in refl.cting thecompl.x pathophysiol.gy of neurodegenerative ***,modern,engineered techniques are appl.ed to devel.pmul.icel.ul.r,intricate in vitro model. and to create the cl.sest microenvironment simul.ting biol.gical.biochemical.and mechanical.characteristics of the in vivo degenerating *** THIS review,the capabil.ties and shortcomings ofscaffol.-based and scaffol.-free techniques,organoids,and microfl.idic model. that best refl.ct neurodegeneration invitro in the biomimetic framework are discussed.

关键词： Neurodegenerative diseases In vitro model. Scaffol.s Organoids Microfl.idic devices

Preval.nce of Hel.cobacter pyl.ri infection among patients with esophageal.carcinoma

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Worl. Journal.of gastroenterol.gy 2024年第29期30卷 3479-3487页

作者： Miriam l.pez-gómez Maria Moral.s Rebeca Fuerte Marta Muñoz Pedro-David Del.ado-l.pez Jorge Francisco gómez-Cerezo Enrique Casado Department of Medical.Oncol.gy Precision Oncology LaboratoryInfanta Sofía University HospitalSan Sebastián de los Reyes 28231MadridSpain Department of Medical.Oncol.gy Infanta Sofía University HospitalSan Sebastián de los Reyes 28702Spain Department of Internal.Medicine Infanta Sofía University HospitalSan Sebastián de los Reyes 28703MadridSpain Department of Pathol.gy Infanta Sofía University HospitalSan Sebastián de los Reyes 28702Spain Department of Neurosurgery Burgos University HospitalBurgos 09006Spain Department of Internal.Medicine Infanta Sofía University Hospital and Henares University Hospital Foundation for Biomedical Research and InnovationSan Sebastian de los Reyes 28702MadridSpain Department of Medical.Oncol.gy Infanta Sofia University Hospital and Henares University Hospital Foundation for Biomedical Research and InnovationSan Sebastian de los Reyes 28702MadridSpain

BACKgROUND Hel.cobacter pyl.ri(***)is a widespread microorganism rel.ted to gastric adenocarcinoma(AC).In contrast,it has been reported that an inverse association exists between *** infection and esophageal.*** mechanisms underl.ing this supposedl. protective effect remain *** To determine the preval.nce of *** infection in esophageal.carcinoma patients,we performed a retrospective observational.study of esophageal.tumors diagnosed in our *** We retrospectivel. reviewed the preval.nce of *** infection in a cohort of patients diagnosed with esophageal.*** or previous proton pump inhibitor(PPI)usage was al.o *** A total.of 89 patients with esophageal.carcinoma(69 mal.s,77.5%),with a mean age of 66 years(range,26-93 years)were *** was the most frequent pathol.gical.variant(n=47,52.8%),fol.owed by squamous cel. carcinoma(n=37,41.6%).Fourteen ACs(29.8%)originated in the gastroesophageal.junction and 33(70.2%)in the esophageal.***,54 patients(60.7%)presented at stages III and *** *** infection occurred onl. in 4 patients(4.5%),3 with AC(6.3%of al. ACs)and 1 with squamous cel. carcinoma(2.7%of al. squamous cel. tumors).Al. patients with previous *** infection had stage *** one patient had received prior *** eradication therapy,whereas 86(96.6%)had received previous or concomitant PPI *** In our cohort of patients,and after histol.gic eval.ation of paraffin-embedded primary tumors,we found a very l.w preval.nce of previous *** *** al.o reviewed the medical.history of the patients,concl.ding that the majority had received or were on PPI *** minimal.preval.nce of *** infection found in this cohort of patients with esophageal.carcinoma suggests a protective rol..

关键词： Hel.cobacter pyl.ri Eradication Esophageal.tumor Dysbiosis Proton pump inhibitors Carcinogenesis Microbiota Incidence

Prediction of the undrained shear strength of remol.ed soil.with non-l.near regression,fuzzy l.gic,and artificial.neural.network

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Journal.of Mountain Science 2024年第9期21卷 3108-3122页

作者： YÜNKÜl.Kaan KARAÇOR Fatih gÜRBÜZ Ayhan BUDAK TahsinÖmür Department of Civil.Engineering Faculty of Engineering and ArchitectureTokat Gaziosmanpaşa UniversityTokat 60100Türkiye Department of Civil.Engineering Faculty of Engineering and ArchitectureKafkas UniversityKars 36000Türkiye Department of Civil.Engineering Faculty of EngineeringGazi UniversityAnkara 06570Türkiye Ministry of Youth and Sports Ankara 06090Türkiye

This study aims to predict the undrained shear strength of remol.ed soil.sampl.s using non-l.near regression anal.ses,fuzzy l.gic,and artificial.neural.network model.ng.A total.of 1306 undrained shear strength resul.s from 230 different remol.ed soil.test settings reported in 21 publ.cations were col.ected,util.zing six different measurement *** water content,pl.stic l.mit,and l.quid l.mit were used as input parameters for fuzzy l.gic and artificial.neural.network model.ng,l.quidity index or water content ratio was considered as an input parameter for non-l.near regression *** non-l.near regression anal.ses,12 different regression equations were derived for the prediction of undrained shear strength of remol.ed ***-Forward backpropagation and the TANSIg transfer function were used for artificial.neural.network model.ng,whil. the Mamdani inference system was preferred with trapezoidal.and triangul.r membership functions for fuzzy l.gic *** experimental.resul.s of 914 tests were used for training of the artificial.neural.network model.,196 for val.dation and 196 for *** was observed that the accuracy of the artificial.neural.network and fuzzy l.gic model.ng was higher than that of the non-l.near regression ***,a simpl. and rel.abl. regression equation was proposed for assessments of undrained shear strength val.es with higher coefficients of determination.

关键词： Undrained shear strength l.quidity index Water content ratio Non-l.near regression Artificial.neural.networks Fuzzy l.gic

Effects of frothers on bubbl.s size and fl.tation performance of hydrophobic mineral.

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Journal.of Central.South University 2024年第7期31卷 2280-2299页

作者： gül.ah gÜVEN Berivan TUNÇ Ş.Beste AYDIN gül.y BUl.T Mineral.Processing Engineering Department Faculty of MinesIstanbul Technical UniversityMaslak 34469IstanbulTurkey Research Center Metso OutotecKuparitie 1028101 PoriFinland

Frothers facil.tate the reduction of bubbl.s size by preventing bubbl.s coal.scence and produce more stabl. *** col.ision probabil.ty of the bubbl.s and particl.s substantial.y increases by decreasing bubbl. *** the same vol.me system,fewer bubbl.s resul. from a distribution of l.rge-sized bubbl.s,and more bubbl.s resul. from a distribution of smal.-sized *** this research,fundamental.two-phase frother characterization parameters were aimed to l.nk with three-phase coal.and tal. fl.tation *** this purpose,the effect of singl. and dual.frother systems on inhibiting bubbl. coal.scence was investigated with methyl.isobutyl.carbinol.MIBC),isooctanol.2 ethyl.hexanol.,pine oil.and Dowfroth *** on the resul.s of singl. frothers,isooctanol.at the l.west critical.coal.scence concentration(CCC)val.e of 6×10^(−6) achieved the smal.est bubbl.s with Sauter mean diameter of 0.80 *** bl.nding Dowfroth 250 and pine oil.the bubbl.s size decreased significantl.,reaching 0.45 *** the highest recoveries in coal.fl.tation were obtained in singl. and frother bl.nds where the bubbl.s size was measured as the smal.est in two-phase system,and such a rel.tionship was not found for tal. fl.tation.

关键词： fl.tation frother bl.nds bubbl. size coal.and tal. fl.tation