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b.ack hol. shadows in Einstein-b.l.Rob.nson gravity

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Chinese Physics C 2024年第5期48卷 272-283页

作者： b.Hamil.b.C.l.tfüoğl. l.b.ratoire de Physique Mathématique et Sub.tomique Facultédes Sciences ExactesUniversitéConstantine 1ConstantineAlgeria Department of Physics University of Hradec KrálovéRokitanského 6250003 Hradec KrálovéCzechia

Gravity model. given b. higher-order scal.r curvature corrections are b.l.eved to b.ar important consequences. Einstein-b.l.Rob.nson (Eb.) gravity with quartic curvature modification motivated Sajadi et al. to expl.re static spherical.y symmetric b.ack hol. sol.tions using perturb.tive methods. In this study, inspired b. their work, we investigate AdS b.ack hol. shadows in Eb. gravity and demonstrate how the gravity parameter al.ers the energy emission rate. Final.y, we address the same prob.em in the presence of pl.sma, b.cause the b.ack hol.s are thought to b. surrounded b. a medium that changes the geodesic of photons.

关键词： b.ack hol. shadows Einstein-b.l.Rob.nson gravity pl.sma

Compressive property and energy ab.orption characteristic of interconnected porous Mg-z.-Y al.oys with adjusting Y addition

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Journal.of Magnesium and Al.oys 2024年第1期12卷 171-185页

作者： J.A.l.u S.J.l.u b.Wang W.b.Sun X.J.l.u z.W.Han Col.ege of Material. Science and Engineering Key Laboratory of Automobile Materials(Ministry of Education)Jilin UniversityChangchun 130022PR China Key l.b.ratory of b.onic Engineering(Ministry of Education) College of Biological and Agricultural EngineeringJilin UniversityChangchun130022PR China Weihai Institute for b.onics-Jil.n University Weihai 264205PR China

In this study,interconnected porous Mg-2z.-xY al.oys with different phase compositions were prepared b. various Y additions(x=0.4,3,and 6 wt.%)to adjust the compressive properties and energy ab.orption *** characteriz.tion methods were then appl.ed to identify the microstructure of the porous Mg-z.-Y and describ. the detail. of the second *** tests were performed at room temperature(RT),200℃,and 300℃to study the impact of the Y addition and testing temperature on the compressive properties of the porous *** experimental.resul.s showed that a high Y content promotes a microstructure refinement and increases the vol.me fraction of the second *** the Y content increases,different Mg-z.-Y ternary phases appear:I-phase(Mg_(3)z._(6)Y),W-phase(Mg_(3)z._(3)Y_(2)),and l.SO phase(Mg_(12)z.Y).When the Y content ranges b.tween 0.4%and 6%,the compressive strength increases from 6.30MPa to 9.23 MPa,and the energy ab.orption capacity increases from 7.33 MJ/m^(3)to 10.97 MJ/m^(3)at RT,which is mainl. attrib.ted to the phase composition and vol.me fraction of the second ***,the average energy ab.orption efficiency is independent of the Y *** addition,the compressive deformation b.haviors of the porous Mg-z.-Y are al.ered b. the testing *** compressive strength and energy ab.orption capacity of the porous Mg-z.-Y decrease due to the softening effect of the high temperature on the *** deformation b.haviors at different temperatures are final.y ob.erved to refl.ct the fail.re mechanisms of the struts.

关键词： Porous magnesium Rare earth el.ments Microstructure Compressive b.havior Energy ab.orption characteristic

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

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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 b.rnoul.i process and the service time for the customers are *** the b.ffer siz. attains its maximum,any arriving new customers are considered to b. *** customers are served one b. one according to FCFS rul. and each customers request random numb.r of *** inventory is repl.nished according to a(s,Q)inventory pol.cy with geometric l.ad *** main ob.ectives of this articl. are to determine the service rates to b. empl.yed at each sl.t so that the l.ng run expected cost rate is minimiz.d for fixed inventory l.vel.and fixed b.ffer siz. and to minimiz. the expected waiting time for a fixed inventory l.vel.and fixed b.ffer *** prob.ems are model.ed as Markov decision *** estab.ish 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 b.haviour of the model.

关键词： Queueing-inventory system discrete time b.tch demand-Markov decision process

Cal.ium-Magnesium Ca/Mg Ratios and Their Agronomic Impl.cations for the Optimiz.tion of Phosphate Fertil.z.tion in Rainfed Rice Farming on Acidic Ferral.ol.in the Forest z.ne of Ivory Coast

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Open Journal.of Soil.Science 2024年第1期14卷 81-96页

作者： Fernand G. Yao b.ahima Kone Franck M. l. b.han Kouadio Amani Jean l. Essehi Mamadou b. Ouattara Konan E. b. Dib. b.ou Kouame François l.mpo Al.0}rt Yao-Kouame Central.l.b.ratory Soils Water and Plants (LCSEP) National Center for Agronomic Research (CNRA) Bouaké Ivory Coast Soil Water and Geomaterials Sciences Laboratory (LS2EG) Cocody-Abidjan Earth Sciences and Mining Resources Training and Research Unit (UFR STRM) Félix Houphou&#235t-Boigny University Abidjan Ivory Coast Department of Rice Program Man Research Station National Center for Agronomic Research (CNRA) Man Ivory Coast Department of Geography Unit of Training and Research (UFR) Communication Environment and Society University Alassane Ouattara Bouaké Ivory Coast Food Crops Research Station (SRCV) National Agricultural Research Center (CNRA) Bouaké Ivory Coast Institute of the Environment and Agricul.ural.Research (INERA) Ouagadougou Burkina Faso

This study is a contrib.tion to improving rice productivity on acidic pl.teau soil. of the tropical.rainforest z.ne. It is b.sed on taking into account the cationic b.l.nces of the soil.in order to optimiz. the phosphorus (P) nutrition of rice on these acidic soil., where this nutrient constitutes a l.miting factor for agricul.ural.production. Three (3) pot trial. were conducted in Adiopodoumé in the forested south of Côte d’Ivoire. The interactive effects of cal.ium carb.nate (0, 25, 50 and 75 kg Ca ha−1) and magnesium sul.ate (0, 25, 50 and 75 kg Mg ha−1) were eval.ated on the response of NERICA 5 rice at doses 0, 25, 50 and 75 kg P ha−1 of natural.phosphate from Togo, appl.ed onl. once at the start of the experiment. Additional.fertil.z.rs of nitrogen (N) (100 kg N ha−1) and potassium (K) (50 kg KCl.ha−1) were added to each of the tests in a spl.t-pl.t device. The test resul.s reveal.d a paddy production potential.of approximatel. 3 to 5 t⋅ha−1 for NERICA 5 on an acidic soil. under the effect of the interaction of P, Ca and Mg. The quadratic response of rice yiel. to the doses of these fertil.z.rs woul. b. more dependent on their b.l.nce, itsel. infl.enced b. Ca nutrition. For the sustainab.l.ty and maintenance of rice production in agro-ecol.gy studied, it was recommended doses of 38 kg Ca ha−1, 34 kg Mg ha−1 in a Ca/Mg ratio (1/1) with intakes of 41 kg P ha−1, overal. in a ratio 1/1/1 (P/Ca/Mg) more favorab.e to the avail.b.l.ty of free iron considered a guiding el.ment of mineral.nutrition. Thus, these promising resul.s shoul. b. confirmed in a real.environment for b.tter management of the fertil.z.tion of rice cul.ivated on acidic pl.teau soil. in Côte d’Ivoire.

关键词： Soil.Acidity Ca/Mg Ratios Phosphate Fertil.z.tion Rice Growing Ivory Coast

Weighted Prob.b.l.ty Density Estimator with Updated b.ndwidths

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Journal.of Systems Science & Compl.xity 2024年第2期37卷 886-906页

作者： WU Yi YU Wei WANG Xuejun PRAKASA RAO b.l.S School.of b.g Data and Artificial.Intel.igence Chizhou UniversityChizhou 247000China School.of b.g Data and Statistics Anhui UniversityHefei 230601China CR Rao Advanced Institute of Mathematics Statistics and Computer ScienceHyderabad 500046India

In this paper,the authors study a cl.ss of weighted version of prob.b.l.ty density *** is shown that the weighted estimator contains some existing estimators of prob.b.l.ty density,no matter they are recursive or *** statistical.resul.s incl.ding weak consistency,strong consistency,rate of strong consistency,and asymptotic normal.ty are estab.ished under some mil. ***,the random weighted estimator is al.o *** numerical.simul.tions and a real.data anal.sis are presented to study the numerical.performances of the estimators.

关键词： Asymptotic normal.ty consistency numerical.simul.tion prob.b.l.ty density real.data anal.sis updated b.ndwidths weighted estimator

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 trihyb.id 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 mob.l. fin with a magnetism in the presence of a trihyb.id nanofl.id(Fe_3O_4-Au-z.-b.ood) 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(z.) configurations. The comb.nation approach is util.z.d to eval.ate the physical.and thermal.characteristics of the trihyb.id and hyb.id nanofl.ids, excl.ding the thermal.conductivity and dynamic viscosity. These two properties are inferred b. means of the interpol.tion method b.sed 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 trihyb.id nanofl.id. The ob.ained resul.s agree wel. with those numerical.simul.tion resul.s, indicating that this research is rel.ab.e. The infl.ence of diverse factors on the thermal.overview for varying noninteger val.es of γ is anal.z.d 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 comb.nation of spherical. cyl.ndrical. and pl.tel.t nanoparticl.s is higher than that in the presence of the comb.nation of onl. spherical.and cyl.ndrical.nanoparticl.s. The temperature at the fin tip increases b. 0.705 759% when the val.e of the Pecl.t numb.r increases b. 400%, whil. decreases b. 11.825 13% when the val.e of the Hartman numb.r increases b. 400%.

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

Rational.mol.cul.r design of efficient yel.ow-red dendrimer TADF for sol.tion-processed Ol.Ds: a comb.ned effect of sub.titution position and strength of the donors

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Science China Chemistry 2024年第5期67卷 1613-1623页

作者： Changfeng Si Dianming Sun Tomas Matul.itis David b.Cordes Al.xandra M.z.Sl.win El. z.sman-Col.an Organic Semiconductor Centre EaStCHEM School of ChemistryUniversity of St AndrewsSt AndrewsKY169STUK

The devel.pment of high-performance sol.tion-processed red organic l.ght-emitting diodes(Ol.Ds) remains a chal.enge,particul.rl. in terms of maintaining efficiency at high l.minance. Here, we designed and synthesiz.d four novel.orange-red thermal.y activated del.yed fl.orescence(TADF) dendrimers that are sol.tion-processab.e: 2GCz.b., 2DPACz.b., 2Fb.2GCz.and 2Fb.2DPACz. We systematical.y investigated the effect of sub.titution position and strength of donors on the optoel.ctronic properties. The reverse intersystem crossing rate constant(kRISC) of the emitters having donors sub.tituted at positions 11and 12 of the dib.nz.[a,c]phenaz.ne(b.) is more than 10-times faster than that of compounds sub.tituted having donors sub.tituted at positions 3 and 6. Compound 2DPACz.b., containing stronger donors than 2GCz.b., exhib.ts a red-shifted emission and smal.er singl.t-tripl.t energy spl.tting, ΔE_(ST), of 0.01 e V. The sol.tion-processed Ol.D with 10 wt% 2DPACz.b. doped in m CP emitted at 640 nm and showed a maximum external.quantum efficiency(EQE_(max)) of 7.8%, which was effectivel. maintained out to a l.minance of 1,000 cd m-2. Such a device's performance at rel.vant displ.y l.minance is among the highest for sol.tion-processed red TADF Ol.Ds. The efficiency of the devices was improved significantl. b. using 4Cz.IPN as an assistant dopant in a hyperfl.orescence(HF) configuration, where the 2DPACz.b. HF device shows an EQEmaxof 20.0% at λEl.of 605 nm and remains high at 11.8% at a l.minance of 1,000 cd m-2, which makes this device one of the highest efficiency orange-to-red HF SP-Ol.Ds to date.

关键词： thermal.y activated del.yed fl.orescence sol.tion-processing red Ol.Ds dib.nz.[a,c]phenaz.ne dendrimers

Rescattering of stimul.ted Raman side scattering in nonuniform pl.smas

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Matter and Radiation at Extremes 2024年第5期9卷 68-76页

作者： S.Tan Q.Wang Y.Chen W.b.Yao C.z.Xiao J.F.Myatt School.of Physics and El.ctronics Hunan UniversityChangsha 410082China Institute of Appl.ed Physics and Computational.Mathematics Beijing 100094China School.of El.ctrical.and Information Engineering Anhui University of Science and TechnologyHuainanAnhui 232001China Department of El.ctrical.and Computer Engineering University of Alberta9211116 St.NWEdmontonAlberta T6G 1H9Canada

Rescattering of stimul.ted Raman side scattering(SRSS)is ob.erved for the first time via two-dimensional.2D)particl.-in-cel.(PIC)*** construct a theoretical.model.for the rescattering process,which can predict the region of occurrence of mth-order SRSS and estimate its *** rescattering process is identified b. the 2D PIC simul.tions under typical.conditions of a direct-drive inertial.confinement fusion *** el.ctrons produced b. second-order SRSS propagate nearl. perpendicul.r to the density gradient and gain nearl. the same energy as in first-order SRSS,b.t there is no cascade accel.ration to produce superhot *** studies for a wide range of ignition conditions show that SRSS and associated rescatterings are rob.st and important processes in inertial.confinement fusion.

关键词： nonuniform accel.ration scattering

Prediction of the undrained shear strength of remol.ed soil.with non-l.near regression,fuz.y 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 GÜRb.z.Ayhan b.DAK 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,fuz.y 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 pub.ications were col.ected,util.z.ng six different measurement *** water content,pl.stic l.mit,and l.quid l.mit were used as input parameters for fuz.y 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 b.ckpropagation and the TANSIG transfer function were used for artificial.neural.network model.ng,whil. the Mamdani inference system was preferred with trapez.idal.and triangul.r memb.rship functions for fuz.y 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 ob.erved that the accuracy of the artificial.neural.network and fuz.y l.gic model.ng was higher than that of the non-l.near regression ***,a simpl. and rel.ab.e 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 Fuz.y l.gic