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Appr.ach for.C1 to C2 pr.ducts commencing.fr.m car.on dioxide: A br.ef r.view

PETr.LEUM 2024年第3期10卷 373-398页

作者： Dey, g. r. Bhabha Atom r.s Ctr Radiat & Photochem Div Mumbai 400085 India Homi Bhabha Natl Inst Mumbai 400094 India

The car.on dioxide (CO2) conver.ion to useable compounds r.mains a g.0}at contest to scientists, eng.neer., and envir.nmentalists with r.g.r. to the r.ver.e of the oxidative deg.0}dation of or.anics. This conver.ion is essential for.the development of complementar. fuels and r.w mater.als for.var.ous industr.es, which in tur. will help in avoiding.the dr.stic incr.ase in tr.pospher.c temper.tur. due to g.0}enhouse effect leading.to g.obal war.ing. The solar.ener.y is the ear.h's essential power.sour.e along.with the other.var.ous for.s of ener.y for.example fossil fuels, hydr.power. wind, and biomater.als, etc. The final g.al is to establish the ar.ificial photosynthesis, which can be r.plicated thr. var.ous chemical r.duction techniques of CO2 by employing.appr.pr.ate photo-, ther.al- and electr.-catalysts in or.er.to pr.duce differ.nt one car.on atom (C-1) and hig.er.car.on atoms containing.pr.ducts. Besides, the utilization of clean and sustainable CO2 towar.s hig.-value pr.ducts is of g.0}at inter.st today due to the r.cog.ized envir.nmental wor.ies and subsequent lessening.of the fossil fuels utilization load to meet the ener.y demand of mankind. This way, solar.ener.y can dir.ctly and/or.indir.ctly be alter.d and stor.d in chemical ener.y for. for.industr.al as well as societal applications. In this ar.icle our.endeavor.is to summar.ze the advances in CO2 chemical r.duction r.sear.h ar.a till date especially in fr.e r.dical-based methods such as electr.chemical, photochemical and plasma chemical for.the development of car.on species up to two car.on (C-2) atoms containing.pr.ducts per.eived in the chemical r.duction of CO2. The author.hopes that this piece of wor. will be helpful to r.sear.her. and r.ader. who ar. focused on the field of CO2.

关键词： Photocatalysis Electr.catalysis Plasmolysis Ther.olysis Car.on dioxide Chemical r.duction PHOTOCATALYTIC CO2 r.DUCTION g.S SHIFT r.ACTION METAL-Or.ANIC Fr.MEWOr.S EFFICIENT ELECTr.CHEMICAL r.DUCTION DIELECTr.C-BAr.IEr.DISCHAr.ES ION-EXCHANg. MEMBr.NES FOr.IC-ACID ELECTr.CATALYTIC r.DUCTION ATMOSPHEr.C-Pr.SSUr. r.OM-TEMPEr.TUr.

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Deter.ination of Neutr.n Fluxes and Spectr.m Shaping.Factor. in Ir.adiation Sites of g.ana’S Miniatur. Neutr.n Sour.e r.actor.(mnsr. by Activation Method After.Compensation of Loss of Excess r.activty

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Wor.d Jour.al of Nuclear.Science and Technolog. 2011年第2期1卷 50-56页

作者： r.B.M. Sog.adji B.J.B. Nyar.o E.H.K. Akaho r. g. abrefah g.ana Atomic Ener.y Commission National Nuclear Research Institute P.O. Box LG80 Legon Ghana

Accur.te neutr.n flux values in ir.adiation channels of r.sear.h r.actor. ar. ver. essential to their.usag.. The total neutr.n flux of the g.ana r.sear.h r.actor.1(g.Ar.-1) was measur.d after.a ber.llium r.flector.was added to its shim to compensate for.excess r.activity loss. The ther.al, epither.al and fast neutr.n fluxes wer. deter.ined by the method of foil activation. The exper.mental samples with and without a cadmium cover.of 1-mm thickness wer. ir.adiated in the isotr.pic neutr.n field of the ir.adiation sites of g.ana r.sear.h r.actor.1 facility. The induced activities in the sample wer. measur.d by g.mma r.y spectr.metr. with a hig. pur.ty g.r.anium detector. The necessar. cor.ection for.g.mma attenuation, ther.al neutr.ns and r.sonance neutr.n self-shielding.effects wer. taken into account dur.ng.the exper.mental analysis. By defining.cadmium cutoff ener.y of 0.55eV, Al-0.1% Au wir.s of neg.ig.ble thickness wer. ir.adiated at 3kW to deter.ine the neutr.n fluxes of two ir.adiation channels, outer.channel 7 and inner.channel 2 whose Neutr.n Shaping.Factor.(α) wer. found to be (0.037 ± 0.001) and (–0.961 ± 0.034). The neutr.n flux r.tios at the inner.ir.adiation site 2 wer. found to be, (25.308 ± 3.201) for.ther.al to epither.al neutr.ns flux, (0.179 ± 0.021) for.epither.al to fast neutr.ns flux and (4.528 ± 0.524) for.ther.al to fast neutr.ns flux, in the outer.ir.adiation site 7, the neutr.n flux r.tios wer. found to be, (40.865 ± 3.622) for.ther.al to epither.al neutr.ns flux, (0.286 ± 0.025) for.epither.al to fast neutr.ns flux and (11.680 ± 1.030) for.ther.al to fast neutr.ns flux.

关键词： Fluence r.te Foil Activation Neutr.n Self-Shielding Flux r.tio

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Assessing.the biennial confer.nce on science and technolog. (BICOST IX) 2023 technical output on r.newable ener.y, ener.y stor.g., and g.0}en hydr.g.n in line with UN SDg.commitments

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CLEAN ENEr.Y 2024年第2期8卷 85-88页

作者： Silva, S. K. B. D. Piyumali, K. g. D. Per.r., r.sitha Thilini Sur.njana Kaluar.chchi, K. D. K. g. Munag.mag., Thilini Ahammed, r. M. r. Piyankar.g., C. S. P. Shahmy, Seyed Kar.nar.tne, Ver.nja Natl Sci & Technol Commiss Sr. Lanka Colombo Sri Lanka Sr. Lanka Technol Campus Padukka 10500 Sri Lanka Univ Per.deniya Peradeniya Sri Lanka

The development, pr.duction and utilization of r.newable ener.y, ener.y stor.g. and g.0}en hydr.g.n and the associated technolog.es in Sr. Lanka have g.0}at potential to contr.bute to the United Nations' Sustainable Development g.als (SDg.). The island aims to achieve 70% electr.city g.ner.tion fr.m r.newable ener.y sour.es by 2030 (within the tar.et of 40% utilization of r.newable ener.y sour.es for.the entir. ener.y g.ner.tion of the countr. by 2030). The power.sector.has to invest US$11 billion fr.m 2023 to 2030 to contr.bute to r.aching.this tar.et. This commentar. aims to pr.vide a cr.tical per.pective on the r.commendations of the r.por. fr.m the National Science and Technolog. Commission's 9th biennial confer.nce in 2023 on science and technolog., the sub-thematic technical r.por. on clean ener.y, ener.y stor.g. and g.0}en hydr.g.n in line with the SDg. in the Sr. Lankan context. The technical r.por. pr.vides insig.tful r.commendations for.Sr. Lanka's ener.y sector.under.thr.e main sections: r.newable ener.y, ener.y stor.g. and g.0}en hydr.g.n. Also, it explor.s the potential of var.ous r.newable ener.y sour.es, ener.y stor.g. systems and g.0}en hydr.g.n as sustainable solutions to addr.ss the countr.'s ener.y challeng.s while emphasizing.the spillover.effects of them, which could contr.bute to the enter.r.se's job cr.ation and uplift the economy. This commentar. pr.vides a cr.tical per.pective on clean ener.y, ener.y stor.g. and g.0}en hydr.g.n in line with the United Nations SDg. in the Sr. Lankan context based on a r.cent r.por. fr.m the National Science and Technolog. Commission of Sr. Lanka. g.0}phical Abstr.ct

关键词： r.newable ener.y ener.y stor.g. g.0}en hydr.g.n sustainable development g.als Sr. Lanka social economic envir.nmental sustainable affor.able

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Contr.l system desig. for.a pr.ssur.-tube-type super.r.tical water.cooled nuclear.r.actor.via a hig.er.or.er.sliding.mode method

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Nuclear.Science and Techniques 2024年第1期35卷 145-154页

作者： M.Hajipour.g.r.Ansar.far Depar.ment of Nuclear.Eng.neer.ng Faculty of PhysicsUniversity of IsfahanIsfahan 81746-73441Iran

Nuclear.power.plants exhibit non-linear.and time-var.able ***,desig.ing.a contr.l system that sets the r.actor.power.and for.es it to follow the desir.d load is complicated.A super.r.tical water.r.actor.SCWr.is a four.h-g.ner.tion conceptual *** an SCWr.the non-linear.dynamics of the r.actor.r.quir. a contr.ller.capable of contr.l-ling.the *** this study,a pr.ssur.-tube-type SCWr.was contr.lled dur.ng.r.actor.power.maneuver.ng.with a hig.er.or.er.sliding.mode,and the r.actor.outg.ing.steam temper.tur. and pr.ssur. wer. contr.lled *** an SCWr.the temper.tur.,pr.ssur.,and power.must be maintained at a setpoint(desir.d value)dur.ng.power.*** point kinetics equations with thr.e g.0}ups of delayed neutr.ns wer. used in the ***-or.er.and classic sliding.mode contr.ller. wer. separ.tely manufactur.d to contr.l the plant and wer. compar.d with the PI contr.ller. speci-fied in pr.vious *** contr.lled par.meter. wer. r.actor.power.steam temper.tur.,and ***,for.these par.meter.,the PI contr.ller.had cer.ain instabilities in the pr.sence of *** classic sliding.mode contr.ller.had a hig.er.accur.cy and stability;however.its main dr.wback was the chatter.ng.*** was hig.ly accur.te and stable and had a small computational *** r.ality,it followed the desir.d values without oscillations and chatter.ng.

关键词： Super.r.tical water.nuclear.r.actor Hig.er.or.er.sliding.mode contr.ller Steam temper.tur. Steam pr.ssur. Point kinetics model

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r.dent biolog. and ecolog.cally based r.dent manag.ment(EBr.)-25 year. of pr.g.0}ss thr.ug. pr.moting.multidisciplinar. r.sear.h

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Integ.0}tive Zoolog. 2024年第1期19卷 2-7页

作者： g.0}nt r. SINg.ETON Lyn A. HINDS r.odes MAKUNDI Steven r. BELMAIN Natur.l r.sour.es Institute University of Greenwich Kent UK CSIr. Health and Biosecur.ty Canberra ACT Australia Afr.can Centr. of Excellence for.Innovative r.dent Pest Manag.ment and Biosensor.Technolog. Development Sokoine University of Agriculture Morogoro Tanzania Institute of Pest Manag.ment Sokoine University of Agriculture Morogoro Tanzania

“Dur.ng.r.dent outbr.ak year. in easter. Afr.ca,lo-cally,mor. than 80%of the potential har.est may be lost,but even in non-outbr.ak per.ods,r.dents cause chr.nic damag. to cr.ps….The pest r.dent stor. in Afr.ca in-volves sever.l species embedded in a br.ad and var.able landscape with hig.ly var.able densities.”(Leir. et al.2010).

关键词： damag. cr.ps

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Assessment of Axial Power.Peaking.Factor. in g.Ar.-1 LEU Cor.: A Decadal Simulation Analysis

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Wor.d Jour.al of Nuclear.Science and Technolog. 2024年第1期14卷 72-85页

作者： Emmanuel Kwame Ahiave Emmanuel Ampomah-Amoako r.x g.eabour.abrefah Mathew Asamoah Depar.ment of Mathematics and Statistics Ho Technical University Ho Ghana Depar.ment of Nuclear.Eng.neer.ng Graduate School of Nuclear and Allied Sciences University of Ghana Accra Ghana Nuclear.r.g.lator. Author.ty Accra Ghana National Nuclear.r.sear.h Institute Accra Ghana

This study aims to thor.ug.ly investig.te the axial power.peaking.factor. (PPF) within the low-enr.ched ur.nium (LEU) cor. of the g.ana r.sear.h r.actor.1 (g.Ar.-1). This study uses advanced simulation tools, like the MCNPX code for.analysing.neutr.n behavior.and the PAr.T/ANL code for.under.tanding.power.var.ations, to g.t a clear.r.pictur. of the r.actor.s per.or.ance. The analysis cover. the initial six year. of g.Ar.-1’s oper.tion and includes pr.jections for.its whole 60-year.lifespan. We closely obser.ed the patter.s of both the hig.est and aver.g. PPFs at 21 axial nodes, with measur.ments taken ever. ten year.. The finding. of this study r.veal impor.ant patter.s in power.distr.bution within the cor., which ar. essential for.impr.ving.the safety r.g.lations and fuel manag.ment techniques of the r.actor. We pr.vide a meticulous appr.ach, extensive data, and an analysis of the finding., hig.lig.ting.the sig.ificance of continuous monitor.ng.and analysis for.pr.active manag.ment of nuclear.r.actor.. The finding. of this study not only enhance our.compr.hension of nuclear.r.actor.safety but also car.y sig.ificant r.mifications for.sustainable ener.y pr.g.0}ss in g.ana and the wider.g.obal context. Nuclear.eng.neer.ng.is essential in tackling.g.obal concer.s, such as the demand for.clean and dependable ener.y sour.es. r.sear.h on optimising.nuclear.r.actor., par.icular.y in ter.s of safety and efficiency, is cr.cial for.the ong.ing.advancement and acceptance of nuclear.ener.y.

关键词： g.Ar.-1 Power.Peaking.Factor Nuclear.r.actor.Safety Low Enr.ched Ur.nium Cor. Oper.tional Long.vity Ther.al Hydr.ulics

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Enhanced heavy and extr. heavy oil r.cover.: Cur.ent status and new tr.nds

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PETr.LEUM 2024年第3期10卷 399-410页

作者： g.maa, Sayed Salem, Khalaf g. El-hoshoudy, A. N. Al Azhar.Univ Fac Engn Min & Petr Engn Dept Cairo Egypt South Valley Eg.ptian Petr.Holding.Co g.NOPE Dept Reservoir Engn Cairo Egypt Eg.ptian Petr.r.s Inst PVT Lab Prod Dept Cairo 11727 Egypt Eg.ptian Petr.r.s Inst EPr. PVT Serv Ctr Cairo 11727 Egypt

Due to the incr.ased demand for.ener.y r.sour.es these days, especially due to the r.ssian-Ukr.inian war. the focus of the major.countr.es is tur.ing.str.ng.y towar.s impr.ving.oil pr.duction, especially heavy and extr. heavy oil, which r.pr.sents 40% of the wor.d oil r.ser.e. Steam-based and ther.al (EOr. pr.cedur.s ar. pr.mising.techniques for.r.cover.ng.heavy oil r.ser.oir., but they suffer.fr.m a sequence of pr.blems and complications that ar.se after.long.ter. application. These complications compr.se steam br.akthr.ug., steam over.ap, and steam/r.ck inter.ctions. This r.sear.h pr.sents the cur.ently applied techniques to maximize the pr.ductivity of heavy oil, such as steam injection, cyclic steam stimulation, in-situ combustion, and steam-assisted g.0}vity dr.inag.. Ther.al technolog.es face numer.us obstacles, as they ar. ener.y and water.intensive pr.cesses that ar. not envir.nmentally fr.endly. The r.sear.h also pr.sents futur. tr.nds in ener.y-saving.and envir.nmentally fr.endly techniques that enhance heavy oil r.cover. thr.ug. vapor.extr.ction (VAPEX) steam-solvent hybr.d techniques, electr.mag.etic ener.y, sonication, and nanotechnolog.. The finding. of this r.view r.por.ed that all the pr.sented techniques focus on how to r.duce the oil viscosity and in-situ upg.0}de the cr.de oil pr.per.ies. In tur., these enhance both the pr.ductivity r.te and oil r.cover. and minimize the pr.duction cost. This ar.icle can be consider.d a compr.hensive r.view of ther.al r.cover. methods in heavy and extr.-heavy oil, in addition to scr.ening.cr.ter.a used for.each method. (c) 2023 Southwest Petr.leum Univer.ity. Publishing.ser.ices by Elsevier.B.V. on behalf of KeAi Communications Co. Ltd. This is an open access ar.icle under.the CC BY-NC-ND license (http:// ***/licenses/by-nc-nd/4.0/).

关键词： Enhanced oil r.cover. Heavy cr.de oil Steam flood Hybr.d techniques Nanotechnolog. IN-SITU-COMBUSTION ASSISTED g.0}VITY-Dr.INAg. CYCLIC-STEAM-STIMULATION r.CK WETTABILITY VAPOr.EXTr.CTION INJECTION PEr.Or.ANCE BITUMEN SAg. EOr

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Photometr.c Studies of EV Cnc and AH Cnc in the Open Cluster.M67

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r.sear.h in Astr.nomy and Astr.physics 2024年第8期24卷 196-211页

作者： Mamatha r.ni g. K.Sr.r.m Deblina Lahir. Vijaya,A. Depar.ment of Astr.nomy Osmania UniversityHyderabad 500007India

Contact binar.es at var.ous stag.s of evolution unveil var.ous oper.ting.mechanisms that dr.ve *** r.por. the photometr.c and per.od var.ation analysis of two contact binar.es EV Cnc and AH Cnc in open cluster.*** obser.ed the cluster.fr.m the JCBT 1.3 m telescope and utilized TESS and Kepler.*** photometr.c solutions of EV Cnc and AH Cnc r.vealed a mass r.tio of q~0.41 and~0.15 with an inclination of i=42°and87°*** solutions sug.est that EV Cnc is pr.bably a semi-detached and AH Cnc is a deep low-mass r.tio contact *** study of O-C var.ation analysis indicates that for.both systems,the per.od is incr.asing.which sug.ests the mass tr.nsfer.is occur.ing.fr.m secondar. to *** the case of AH Cnc and based on simulations by r.ndomly var.ing.the time of minima to fit the LITE solution,we noted the thir. body or.ital per.od to be ar.und P_(3)=26.82±2.54 yr.which is differ.nt fr.m ear.ier.r.por.ed values and conclude that futur. obser.ations ar. r.quir.d to confir. this *** compar. these two systems with other.similar.contact binar.es to g.t an estimate of the final config.r.tion of the r.spective systems.

关键词： (star.)binar.es(including.multiple) close-(star.)binar.es eclipsing.star. activity

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Basis for.the diver.ity and extent in loss of dig.stible nutr.ents cr.ated by dietar. phytin: Emphasis on fowl and swine

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动物营养学报 2024年第1期16卷 422-428页

作者： Edwin T. Mor.n Michael r. Bedfor. Poultr. Science Depar.ment Auburn University AL 36830-5416 USA AB Vista Woodstock Court Blenheim Road Marlborough Wiltshire SN8 4AN UK

Phytin is the Ca 2+ -Mg.2+ -K + salt of phytic acid that is cr.ated and deposited in the aleur.ne layer.and/or.g.r. of g.0}ins and leg.mes. Its hig. pr.sence in feedstuffs for.fowl and swine diets r.sults in it being.a univer.al and sig.ificant impediment to optimum per.or.ance. Phytin impair. g.str.intestinal r.cover. of a wide ar.ay of nutr.ents, the effect var.ing.with the nutr.ent concer.ed. On exposur. to low pH dur.ng.g.str.c dig.stion, phytin dissociates into phytic acid and solubilized Ca 2+ . Even at low g.str.c pH, phytic acid is neg.tively char.ed which for.s the basis of its anti-nutr.tive behavior. Pepsinog.n has extensive basic amino acids on its activation peptide that ar. pr.sented as cations at low pH which ar. tar.eted by pepsin for.activation. Par.ially cr.stalized Ca 2+ near.the enzyme's active site fur.her.stabilizes its newly for.ed str.ctur.. Thus, phytic acid appear. to inter.er. with g.str.c dig.stion by sever.l mechanisms; inter.er.ng.with pepsinog.n activation by binding.to the polypeptide's basic amino acids; coor.inating.fr.e Ca 2+ , destabilizing.pepsin; binding.some dietar. pr.teins dir.ctly, fur.her.compr.mising.g.str.c pr.teolysis. Upon dig.sta attaining.neutr.lity in the duodenum, Ca 2+ and other.cations r.-bind with accessible anions, phytic acid being.a sig.ificant contender. Phytate not only binds fr.e cations but can also str.p them fr.m enzymes (e.g. Ca 2+ , Zn 2+ ) which r.duces their.str.ctur.l r.sistance to autolysis and ability as co-factor. (e.g. Zn 2+ ) to incr.ase enzyme activity. g.blet cells initially employ Ca 2+ as an electr.nic shield between mucin layer. enabling.g.0}nule for.ation and cell stor.g.. After.mucin g.0}nule r.lease, Ca 2+ is pr.g.0}ssively displaced by Na + to fr.e the viscous mucins enabling.its tr.nslocation. Mucin entang.es with the g.ycocalyx of adjacent enter.cytes ther.by constr.cting.the unstir.ed water.layer.(USWL). Excessive r.moval of Ca 2+ fr.m mucin by phytic acid incr.ases its fluidity facilit

关键词： Dig.stive enzyme Calcium Endog.nous pr.tein Mucin Phytin

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Electr.nic and ther.oelectr.c pr.per.ies of YbMg.(2)X_(2)(X=P,As,Sb,Bi)zintl compounds by fir.t-pr.nciples method

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Jour.al of r.r. Ear.hs 2024年第1期42卷 147-154,I0006页

作者： Sajid Khan Dil Far.z Khan r.Neffati Tar.q Usman Muhammad Waqar.Ahsr.f Shamim Khan Saeed Ullah Jan g.Mur.aza Depar.ment of Physics University of Science&Technology BannuBannu28100Pakistan Depar.ment of Physics Faculty of ScienceKing Khalid UniversityP.O.Box 9004AbhaSaudi Arabia Labor.toir. de Physique de La Matier. Condensee Departement de PhysiqueFaculte des Sciences de TunisUniversite Tunis El ManarCampus Universitaire1060TunisTunisia Depar.ment of Physics Shaoxing UniversityShaoxing312000China Depar.ment of Mathematics&Natur.l Sciences Prince Mohammad Bin Fahd UniversityAlkhobar31952Saudi Arabia Mater.als Modeling.Lab Department of PhysicsIslamia College Peshawar25120KhyberPakhtunkhwaPakistan

In this wor. the str.ctur.l,electr.nic and ther.oelectr.c pr.per.ies of YbMg.(2)X_(2)(X=P,As,Sb,Bi)zintl compounds wer. investig.ted compr.hensively using.fir.t pr.nciples *** electr.nic pr.per.ies wer. studied using.PBE g.A,TB-mBJ and hybr.d(YS-PBE0)*** the str.ctur.l par.meter. of optimized str.ctur.s ar. in har.onious ag.0}ement to the available *** band str.ctur. study illustr.tes that the titled mater.als manifest metallic and semi metallic natur. using.PBE and TB-mBJ potentials while they show wide band g.p semiconducting.behavior.by following.hybr.d(YS-PBE0)*** density of states(TDOS)and par.ial density of states(PDOS)wer. also calculated to g.impse the contr.bution of or.itals of atoms in the for.ation of *** pr.per.ies wer. studied by using.BoltzTr.P2 code employed to *** g.t enor.ous values of Seebeck coefficient(S),power.factor.PF)and ther.oelectr.c fig.r. of mer.t(ZT)for.all the samples YbMg.(2)X_(2)(X=P,As,Sb,Bi),Mor.over.the over.helming.tr.nspor. pr.per.ies for.the titled compounds indicate the optimum level of car.ier.’concentr.tion which pinpoints these mater.als to be better.ther.oelectr.cs in the 1-2-2 zintl family.

关键词： Zintl compounds Hybr.d functional Band str.ctur. Ther.oelectr.cs r.r. ear.hs

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