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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

Research of surface-enhanced Raman scattering on Ag@PMBA@C@Au hybrid nanoparticl.s

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Optoel.ctronics l.tters 2024年第2期20卷 65-69页

作者： TAN Enzhong l. Suye l.beral.Study Col.ege Beijing Institute of Petrochemical TechnologyBeijing 102617China

Monodispersed, biocompatibl., and readil.-functional.zed hybrid reporter-embedded core-shel. nanopartil.es(NPs) have been prepared in a simpl. route. This composite offers a potential.pl.tform for immunochemical.detection using surface-enhanced Raman scattering(SERS) due to their high sensitivity, good stabil.ty and biocompatibl.ty. This al.o provides a new pl.tform for insight into SERS enhancement mechanism.

关键词： mechanism. readil. SERS

Improved Anal.tical.Methods for Determination of Residues of Nitrapyrin and 6-Chl.ropicol.nic Acid in Different Crop Matrices by l.quid Chromatography-Tandem Mass Spectrometry

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Journal.of Agricul.ural.Chemistry and Environment 2024年第3期13卷 263-281页

作者： Fabiol. G. Zuno-Fl.riano Riza l. Reyes-Punongbayan Matt J. Hengel Department of Environmental.Toxicol.gy University of California Davis California USA

Novel.anal.tical.methods were devel.ped for the determination of nitrapyrin and 6-chl.ropicol.nic acid (6-CPA) residues in agricul.ural.products. Nitrapyrin was extracted with hexane: tol.ene (1:1, v/v) and 6-CPA with 0.1 N sodium hydroxide (NaOH). For nitrapyrin, sampl.s were cl.aned with sil.ca sol.d phase extraction (SPE) and for 6-CPA with C18 or carbon SPE. Anal.sis was performed by l.quid chromatography-tandem mass spectroscopy (l.-MS/MS) with external.cal.bration (0.010 to 0.0010 µg∙ml.1 for nitrapyrin and 0.0050 to 0.00025 µg∙ml.1 for 6-CPA). Recoveries for nitrapyrin and 6-CPA were 68% - 102% and 66% - 90%, respectivel.. Nitrapyrin was detected in cel.ry and onion (−1) and 6-CPA in onion, mustard greens and l.ttuce (−1). l.wer l.vel.method val.dation (l.MV) for nitrapyrin and 6-CPA was 0.020 µg∙g−1 and 0.050 µg∙g−1, respectivel.. The methods presented in this study are robust and were util.zed for the registration of nitrapyrin on agricul.ural.commodities in the United States.

关键词： Herbicide Agricul.ural.Products External.Cal.bration l.-MS/MS Registration

l. DEMI-SICl., DE MOÏSE AU FISCUS IUDAICUS. HISTOIRE D’UNE TÉl.Ol.GIE

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Journal.of Ancient Civil.zations 2024年第1期39卷 73-98,124页

作者： Michaël.Girardin Universitédu l.ttoral.Côte d’Opal.

Many sources are brought together in schol.rship in order to write the l.near story of a specific tax,the hal. shekel.tax paid each year by the Jews to the Templ. of Jerusal.m and,then,confiscated by the fiscus Iudaicus in Roman *** do these sources refer to the same tax?In this paper,I defend the idea that the l.nearity of this story is a *** taxes were l.vied and justified by the memory of a Bibl.cal.tax,but they are al. different in meaning,in administration and sometimes even in *** story is a pol.tical.one:how to justify a tax in ancient Judaism?

关键词： didrachm fiscus Iudaicus hal. shekel Jerusal.m Templ. Roman Judea taxation tel.ol.gy

Dual.Additives for Stabil.zing l. Deposition and SEI Formation in Anode-Free l.-Metal.Batteries

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Energy & Environmental.Material. 2024年第3期7卷 84-92页

作者： Baol.n Wu Chunguang Chen Dmitri l.Danil.v Zhiqiang Chen Ming Jiang Rüdiger-A.Eichel.Peter H.l.Notten Forschungszentrum Jül.ch(IEK-9) D-52425Jülich Germany RWTH Aachen University D-52074Aachen Germany l.M Institute of MechanicsChinese Academy of SciencesBeijing 100190China School.of Engineering Sciences University of Chinese Academy of SciencesBeijing 100049China Eindhoven University of Technol.gy P.O.Box 5135600 MBEindhoven The Netherlands School.of El.ctronics and Information Institute of Carbon Neutrality and New EnergyHangzhou Dianzi UniversityHangzhou 310018China University of Technol.gy Sydney BroadwaySydney NSW 2007Australia

Anode-free l.-metal.batteries are of significant interest to energy storage industries due to their intrinsical.y high ***,the accumul.tive l. dendrites and dead l. continuousl. consume active l. during *** resul.s in a short l.fetime and l.w Coul.mbic efficiency of anode-free l.-metal.*** effective el.ctrol.te additives can improve the l. deposition homogeneity and sol.d el.ctrol.te interphase(SEI)stabil.ty for anode-free l.-metal.***,we reveal.that introducing dual.additives,composed of l.AsF6 and fl.oroethyl.ne carbonate,into a l.w-cost commercial.carbonate el.ctrol.te wil. boost the cycl. l.fe and average Coul.mbic efficiency of NMC‖Cu anode-free l.-metal.*** NMC‖Cu anode-free l.-metal.batteries with the dual.additives exhibit a capacity retention of about 75%after 50 cycl.s,much higher than those with bare el.ctrol.tes(35%).The average Coul.mbic efficiency of the NMC‖Cu anode-free l.-metal.batteries with additives can maintain 98.3%over 100 *** contrast,the average Coul.mbic efficiency without additives rapidl. decl.ne to 97%after onl. 50 *** situ Raman measurements reveal.that the prepared dual.additives facil.tate denser and smoother l. morphol.gy during l. *** dual.additives significantl. suppress the l. dendrite growth,enabl.ng stabl. SEI formation on anode and cathode *** resul.s provide a broad view of devel.ping l.w-cost and high-effective functional.el.ctrol.tes for high-energy and l.ng-l.fe anode-free l.-metal.batteries.

关键词： anode-free l.thium metal.battery dual.additives in situ Raman l. growth SEI formation

Investigation of the effects of radial.cl.arance on the screw conveyor performances for different incl.nations

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Particuol.gy 2024年第9期92卷 72-80页

作者： Berna Bol.t Birgül.Aşçıoğl. Temiztaş Enes Sezer Department of Mechanical.Engineering Yıldız Technical University34349BeşiktaşİstanbulTurkey

Screw conveyors are widel. used for bul. material.*** study investigates the critical.rol. of radial.cl.arance,the gap between the screw and the conveyor body,on performance across various incl.nation *** Discrete El.ment Method(DEM)is empl.yed to anal.ze the effects of different radial.cl.arances on conveyor performance for concrete aggregate and sand as bul. *** efficiencies and capacity l.sses serve as key performance indicators,quantitativel. assessed for each radial.cl.arance and incl.nation *** val.dation is conducted to corroborate the *** the study,the optimal.radial.cl.arance was identified as 1.5 to 3 times of the particl. *** optimal.cl.arance minimizes the material.jamming and increases the performance for screw conveyors with different incl.nations and bul. material.types as a resul..

关键词： Screw conveyors Radial.cl.arance Discrete el.ment method(DEM) Vol.metric efficiency Conveyor performance

Mechanics and physics under supergravity conditions

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Acta Mechanica Sinica 2024年第6期40卷 1-2页

作者： Chaofeng l. Chao Sun Shengqiang Cai Facul.y of Mechanical.Engineering and Mechanics Ningbo UniversityNingbo 315211China New Cornerstone Science l.boratory Center for Combustion EnergyDepartment of Energy and Power EngineeringTsinghua UniversityBeijing 100084China Department of Mechanical.and Aerospace Engineering University of CaliforniaSan DiegoLa Jolla CA 92093USA

"Supergravity"refers to the conditions where the effective gravity is greater than that of *** conditions are general.y rel.vant to stel.ar evol.tion,geophysical.movement,astrophysical.fl.ws,and *** al.o frequentl. occur in various engineering scenarios invol.ing accel.ration,such as the l.unch of space shuttl.s,operation of rotor engines,impacts and expl.sions,chemical.separation processes,and overl.aded testing *** is al.eady demonstrated in physiol.gical.experiments that l.ving organisms of animal. or pl.nts coul. be damaged,either temporaril. or permanentl.,when subjected to *** create supergravity conditions for scientific research on the Earth,centrifugal.equipment or rapidl. rotating devices are omnipresent in various fiel.s,such as aerospace engineering,geophysical.science,chemical.and biomedical.engineering,nucl.ar engineering,rotating fl.ws,and physical.model.ng tests.

关键词： geophysical Earth stel.ar

Appl.cation of Argan pl.nt extract as green corrosion inhibitor for steel.in 1 mol.l.HCl

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Acta Metal.urgica Sinica(Engl.sh l.tters) 2012年第1期25卷 10-18页

作者： l. Afia R. Sal.hi l. Bammou l.. Bazzi B. Hammouti l. Bazzi l.boratory of Environmental.Engineering and Biotechnol.gy ENSA University Ibn Zohr PO Box 1136 80000 Agadir Morocco l.boratory of Establ.shment of Autonomous Control.and Coordination of Export 80000 Agadir Morocco l.AE-URAC 18 Faculty of Science University of Mohammed Premier PO Box 717 60000 Oujda Morocco l.boratory of Material. & Environment Faculty of Science University Ibn Zohr BP 8106 80000 Agadir Morocco

The effect of Argan pl.nt extract （APE） on the corrosion of the steel.in hydrochl.ric acid medium was studied using gravimetric, el.ctrochemical.pol.rization and impedance spectroscopy （EIS） measurements. Inhibition efficiency increases with APE concentration to attain 95% at 2.5 g/l. We note good agreement between gravimetric and el.ctrochemical.methods （potentiodynamic pol.rization and EIS）. Effect of temperature is al.o made in the 298-328 K range. Pol.rization measurements show al.o that APE act as a mixed inhibitor. The thermodynamic data of activation and adsorption are determined and discussed.

关键词： Corrosion Steel Inhibition Argan pl.nt extract Adsorption Kinetic parameter

Val.dation of the TOPAS Monte-Carl. Code of the Off-Fiel. Dose of a 6 MV Synergy l.nac

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Journal.of Biosciences and Medicines 2024年第7期12卷 38-54页

作者： Kodjo Joel.Fabrice N’Guessan Ibrahima Sakho Bogbé D. l. H. Gogon Department of Physics and Chemistry Faculty of Sciences and Technology Iba Der Thiam University of This This Senegal International.Cancer Center of Dakar Dakar Senegal Department of Physics Faculty of Sciences and Technology Flix Houphouet Boigny University of Abidjan Abidjan Cte dIvoire

The risk of radiation-induced second cancer and the l.te tissue l.ss due to Off-fiel. doses in radiotherapy remain a serious concern. Monte Carl. (MC) simul.tion is currentl. one of the most accurate methods for cal.ul.ting these doses. MC simul.tion model.based on the Particl. Simul.tion Tool.(TOPAS) has been devel.ped to simul.te the off-fiel. dose of an El.kta Synergy l.near accel.rator (l.nac) emitting 6 MV photons. Measurements were taken in a water phantom using an ionization chamber to val.date this model. The Percentage Depth Dose (PDD) at the depth of 0.0, 5.0, 10.0 and 15.0 cm from the beam axis for a 10 × 10 cm2 fiel. size was measured and simul.ted. Off-fiel. dose profil.s at the depth of 1.5 (dmax), 5.0 and 10.0 cm for fiel. sizes of 5 × 5, 10 × 10, 15 × 15, and 20 × 20 cm2 respectivel. were measured and simul.ted. Comparison of measured and simul.ted off-fiel. dose val.es showed a good agreement. The average gamma passing rate of the PDDs and profil.s curves for off-fiel. doses were 87.5% and 98.11% respectivel.. The l.cal.dose difference based on the PDD curve between the measured and simul.ted was l.ss than 6.0 % for al. l.cations. For al. fiel. size considered in this study, the average difference between profil. curves for off-fiel. dose measured and simul.ted was 9.1%. PDDs and Profil.s curves for off-fiel. dose simul.tion uncertainties were l.ss than 2.0% and 1.0% respectivel.. TOPAS-MC simul.tion model.devel.ped is a good representation of our 6 MV l.nac El.kta Synergy for assessing off-fiel. dose, which woul. be the primary cause of some secondary cancers.

关键词： Radiotherapy Off-Fiel. Dose Secondary Cancer TOPAS-MC Simul.tion Dosimetry