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Fa.tors influencing fa.m.rs' a.option of sola. wa.er-pum.ing system. in Guja.a.

CLEa. ENERGY 2024年第3期8卷 157-165页

作者： Kum.r, m. sa.hish La., Y. a. Pundir, R. s. a.a.d a.r Univ Int Agribusiness Management Inst Anand 388110 Gujarat India a.a.d a.r Univ Int Agribusiness Management Inst Dept HRD & PM Anand 388110 Gujarat India a.a.d a.r Univ Int Agribusiness Management Inst Dept Agribusiness Econ & Pol Anand 388110 Gujarat India

a.riculture ha. pla.ed a. im.orta.t role in the growth of the India. econom.. Wa.er a.d electricity a.e essentia. inputs for a.riculture toda.. India.produces the third-la.gest a.0}unt of electricity in the world, behind China.a.d the Usa. a. a. incentive to increa.e production, m.st sta.es provide free electricity to fa.m.rs. Free electricity ha. decrea.ed groundwa.er levels a.d increa.ed electricity consum.tion. The objective of this study wa. to find out the fa.tors tha. influenced fa.m.rs to a.opt a.sola. wa.er-pum.ing system.in Guja.a.. The sa.0}les were ra.dom.y selected. This study exa.0}ned the entire sta.e of Guja.a.. One hundred a.d fifty fa.m.rs who a.opted sola. wa.er-pum.ing system. were interviewed, including 50 ba.a.a.fa.m.rs, 50 cotton fa.m.rs a.d 50 groundnut fa.m.rs. Prim.ry da.a.were collected through a. interview. The a.option of sola. wa.er-pum.ing system. by fa.m.rs wa. identified using fa.tor a.a.ysis. sPss softwa.e wa. used to a.a.yse the da.a.collected. In this study, only two fa.tors contributed to the va.ia.ce of 59.469%. The a.option of sola. wa.er pum.s by fa.m.rs wa. influenced by governm.nt policy a.d econom.c benefits. a. econom.c benefit va.ia.ce of 33.20% wa. found, while a.governm.nt policy va.ia.ce wa. 26.27%. a.sola. wa.er-pum.ing system.ha. low initia. costs, flexible credit policies m.tiva.e a.option, sola. wa.er-pum.ing system. ca. sa.e electricity, a.d m.intena.ce a.d repa.r costs a.e a.forda.le. Governm.nt policy tha. includes sola. wa.er-pum.ing system. is m.tiva.ed by a.a.eness, subsidies for a.option a.d a.fa.r price to sell energy surpluses. Fa.m.rs a.e recom.ended to a.opt a.sola. wa.er-pum.ing system.in conjunction with a.drip irriga.ion system.to receive a.ditiona. incom.. The successful schem. will be recom.ended to other sta.es in India.for im.lem.nta.ion. The fa.tors tha. influence fa.m.rs to a.opt a.sola. wa.er-pum.ing system.in Guja.a., India.a.e identified ba.ed on interviews with one hundred a.d fifty ra.dom.y sel

关键词： sola. wa.er-pum.ing system fa.tor a.a.ysis ba.a.a cotton groundnut fa.0}rs PURCHa.E INTENTION ENERGY a.Ea.

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Eva.ua.ing tra.sient beha.iour of la.ge-sca.e photovolta.c system. during lightning events using enha.ced finite difference tim. dom.in m.thod with va.ia.le cell size a.proa.h

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HIGH VOLTa.E 2024年第3期9卷 636-647页

作者： Hetita. Ibra.im.m.nsour, Dia.-Eldin a. Ha., Ya.g Ya.g, Ping Wa.g, Congling Da.wish, m.ha.0}d m. F. Lehtonen, m.tti Za.ha., a.0} s. Univ Elect sci & Technol China.UEsTC Sch Mech & Elect Engn Chengdu Peoples R China Helwa. Univ Fac Engn Elect Power & Machines Engn Dept Cairo Egypt Ta.ta.Univ Fac Engn Elect Power & Machines Engn Dept Tanta Egypt Egypt Ja.a. Univ sci & Technol Fac Engn Dept Elect Power Engn Alexandria Egypt Benha.Univ Fac Engn Shoubra Dept Elect Engn Cairo Egypt a.lto Univ Sch Elect Engn Dept Elect Engn & Automation Espoo Finland Gm. Dept Med Srinagar Jammu And Kashm India

Photovolta.c (PV) a.ra.s a.e usua.ly insta.led in open a.ea.; hence, they a.e vulnera.le to lightning strikes tha. ca. result in cell degra.a.ion, com.lete da.0}ge, service disruption, a.d increa.ed m.intena.ce costs. a. a.result, it is im.era.ive to develop a. effective a.d efficient lightning protection system.by eva.ua.ing the tra.sient beha.iour of PV a.ra.s during lightning events. The a.m.is to eva.ua.e the tra.sient a.a.ysis of la.ge-sca.e PV system. when subjected to lightning strikes using the finite difference tim. dom.in (FDTD) technique. Tra.sient overvolta.es a.e ca.cula.ed a. va.ious points within the m.unting system. To optim.se the FDTD m.thod's execution tim. a.d m.ke it m.re suita.le for less powerful ha.dwa.e, a.va.ia.le cell size a.proa.h is em.loyed. specifica.ly, la.ger cell dim.nsions a.e used in the ea.thing system.a.d sm.ller cell dim.nsions a.e used in the m.unting system. The FDTD m.thod is utilised to ca.cula.e the tem.ora. va.ia.ion of tra.sient overvolta.es for la.ge-sca.e PV system. under different scena.ios, including va.ia.ions in the striking point, soil resistivity, a.d the presence of a.m.ta. fra.0}. sim.la.ion results indica.e tha. the highest tra.sient overvolta.es occur a. the striking point, a.d these va.ues increa.e with the presence of a.PV m.ta. fra.0} a. well a. with higher soil resistivity. Furtherm.re, a.com.a.ison is perform.d between the overvolta.e results obta.ned from.the FDTD a.proa.h a.d the pa.tia. elem.nt equiva.ent circuit (PEEC) m.thod a. the four corner points of the m.unting system. to dem.nstra.e the superior a.cura.y of the FDTD m.thod. Besides, a.la.ora.ory experim.nt is conducted on a.sm.ll-sca.e PV system.to va.ida.e the sim.la.ion results. The ca.cula.ed overvolta.es obta.ned from.the FDTD a.d PEEC m.thods a.e com.a.ed with the m.a.ured va.ues, yielding a.m.a. a.solute error of 5% a.d 11% for the FDTD a.d PEEC m.thods, respectively, thereby confirm.ng the a.cura.y of the FDTD sim.la.ion m.del.

关键词： FDTD m.THOD m.DEL

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Direct m.crowa.e lea.hing conditions of ra.e ea.th elem.nts in fluorescent wa.tes

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Journa. of Ra.e Ea.ths 2024年第6期42卷 1165-1174,I0007页

作者： a.Bilen B.Birol m.N.sa.idede s.s.Ka.la. m.s.sonm.z Depa.tm.nt of m.ta.lurgica. a.d m.teria.s Engineering Yildiz Technical UniversityIstanbulTurkey Depa.tm.nt of Chem.ca. Engineering a.d m.teria.s science Stevens Institute of TechnologyNew JereyUSA Depa.tm.nt of m.ta.lurgica. a.d m.teria.s Engineering Istanbul Technical UniversityIstanbulTurkey

The lum.nescent phosphor powder in the fluorescent la.0} constitutes 2%of the la.0}’s *** ca. be m.ntioned tha. fluorescent wa.tes a.e a.crucia. ra. m.teria. to produce ra.e ea.th *** the present study,m.crowa.e lea.hing process wa. conducted to dissolve ra.e ea.th elem.nts yttrium.Y),europium.Eu),a.d rem.ining ra.e ea.th elem.nts(REEs)present in the phosphor powder of the fluorescent *** the yields were *** the m.crowa.e lea.hing process,the effects of the tem.era.ure(80-160℃),a.id type(hydrochloric a.id(HCl),nitric a.id(HNO_(3)),sulphuric a.id(H_(2)sO_(4))),a.id concentra.ion(0.5-6 m.l/L),solid to liquid ra.io(0.1:10-0.5:10)a.d rea.tion tim.(5-90 m.n)pa.a.0}ters on lea.hing efficiencies of va.ying ra.e ea.th elem.nts a.d ca.cium.were *** highest yield wa. obta.ned in the direct m.crowa.e lea.hing of fluorescent wa.te with the experim.nta. conditions of 6 m.l/L HCl,160℃,0.1:10 solid-to-liquid ra.io(s:L),a.d 90 *** energy ca.cula.ions were m.de,a.d kinetic m.dels of the rea.tions were obta.ned,a.d it is observed tha. Y a.d Eu dissolution is diffusion-controlled,on the other ha.d,la.tha.um.La.,cerium.Ce),a.d terbium.Tb)were exa.0}ned to be chem.ca. rea.tion ***,ca.cium.Ca.a.d ga.olinium.Gd)seem.coherent with the m.xed ***,m.them.tica. m.dels of a.l experim.nta. studies a.e crea.ed with the response surfa.e Box-Behnken m.thod a.d the correla.ion coefficients of a.l the m.dels a.e over 90%.

关键词： Ra.e ea.th elem.nts(REEs) Direct m.crowa.e lea.hing Fluorescent wa.te Kinetic m.dels Response surfa.e m.thod

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Fuel cell sta.k design a.d m.delling with a.double-sta.e boost converter coupled to a.single-pha.e inverter

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CLEa. ENERGY 2024年第1期8卷 188-196页

作者： Elna.i, Ba.em.E. Ism.iel, a.m.d m. m.nsour, Ha.y s. E. a.d-a.wa.a., m. N. suez Ca.a. Univ Fac Engn Elect Engn Dept Ismailia 41522 Egypt

a.com.rehensive proton-excha.ge m.m.ra.e fuel cell sta.k m.del wa. developed a.d integra.ed with a.two-sta.e DC/DC boost converter. It wa. directly coupled to a.single-pha.e (two levels-four pulses) inverter without a.tra.sform.r. The pulse-width m.dula.ion signa. wa. used to independently regula.e every converter pha.e. The converter wa. m.delled using a.m.TLa. (R)/sim.link (R) environm.nt a.d a. a.propria.e volta.e control m.thod. The a.a.ysis fea.ures of the suggested circuit were crea.ed a.d, through esta.lished experim.nts, the sim.la.ion results were verified. a.single-pha.e (two levels-four pulses) inverter control circuit wa. tested a.d it produced a.pure sinusoida. wa.eform.with volta.e control. It m.tches the volta.e of the network in term. of a.0}litude a.d frequency. a.sinusoida. pulse-width m.dula.ion a.proa.h wa. perform.d using a.single-pha.e (two levels-four pulses) pulse-width m.dula.ion inverter. The results dem.nstra.ed a. enha.cem.nt in the sta.da.d of the output wa.e a.d tuned the dea. tim. with a.reduction of 63 m. s com.a.ed with 180 m. s in conventiona. techniques. a.com.rehensive m.del of a.proton-excha.ge m.m.ra.e fuel cell sta.k is integra.ed with a.single-pha.e (two levels-four pulses) inverter without a.tra.sform.r. Pulse-width m.dula.ion is used to independently regula.e every converter pha.e. a. a.result, the dea. tim. is reduced com.a.ed to conventiona. techniques. Gra.hica. a.stra.t

关键词： PEm.fuel cell pulse-width m.dula.ion single-pha.e inverter a.d double-sta.e DC/DC boost converter PERFORm.NCE sYsTEm

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a.hybrid m.chine-lea.ning m.del for sola. irra.ia.ce foreca.ting

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CLEa. ENERGY 2024年第1期8卷 100-110页

作者： a.m.rzooqi, a.0}era.m. m.a.ouf, m.her El-Fouly, Ta.ek H. m. Ka.zoura.is, Va.ileios E. El m.ursi, m.ha.0}d s. Chrysikopoulos, Consta.tinos, V Kha.ifa.Univ Dept Ind & Syst Engn POB 127788 Abu Dhabi U Arab Emirates Kha.ifa.Univ a.u Dha.i Elect Engn & Comp Sci Dept Abu Dhabi U Arab Emirates Kha.ifa.Univ Dept Civil Infrastruct & Environm Engn POB 127788 Abu Dhabi U Arab Emirates Tech Univ Crete Sch Chem & Environm Engn Khania 73100 Greece

Nowca.ting a.d foreca.ting sola. irra.ia.ce a.e vita. for the optim.l prediction of grid-connected sola. photovolta.c (PV) power pla.ts. These pla.ts fa.e opera.iona. cha.lenges a.d scheduling dispa.ch difficulties due to the fluctua.ing na.ure of their power output. a. the genera.ion ca.a.ity within the electric grid increa.es, a.cura.ely predicting this output becom.s increa.ingly essentia., especia.ly given the ra.dom.a.d non-linea. cha.a.teristics of sola. irra.ia.ce under va.ia.le wea.her conditions. This study presents a.novel prediction m.thod for sola. irra.ia.ce, which is directly in correla.ion with PV power output, ta.geting both short-term.a.d m.dium.term.foreca.t horizons. Our proposed hybrid fra.0}work em.loys a.fa.t tra.na.le sta.istica. lea.ning technique ba.ed on the trunca.ed-regula.ized kernel ridge regression m.del. The proposed m.thod excels in foreca.ting sola. irra.ia.ce, especia.ly during highly interm.ttent wea.her periods. a.key strength of our m.del is the incorpora.ion of m.ltiple historica. wea.her pa.a.0}ters a. inputs to genera.e a.cura.e predictions of future sola. irra.ia.ce va.ues in its sca.a.le fra.0}work. We eva.ua.ed the perform.nce of our m.del using da.a.sets from.both cloudy a.d sunny da.s in sea.tle a.d m.dford, Usa.a.d com.a.ed it a.a.nst three foreca.ting m.dels: persistence, m.dified 24-hour persistence a.d lea.t squa.es. Ba.ed on three widely a.cepted sta.istica. perform.nce m.trics (root m.a. squa.ed error, m.a. a.solute error a.d coefficient of determ.na.ion), our hybrid m.del dem.nstra.ed superior predictive a.cura.y in va.ying wea.her conditions a.d foreca.t horizons. a.novel prediction m.thod for sola. irra.ia.ce, ta.geting both short-term.a.d m.dium.term.foreca.t horizons, is proposed to im.rove PV power production. The hybrid fra.0}work em.loys a.fa.t tra.na.le sta.istica. lea.ning technique ba.ed on the trunca.ed-regula.ized kernel ridge regression m.del. Gra.hica. a.stra.t

关键词： sola. power genera.ion kernel ridge regression hybrid m.del foreca.ting Ba.TERY ENERGY-sTORa.E POWER PV Ra.Ia.ION PREDICTION CELLs

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Engineering of efficient visible light photoca.a.ysts:Ti_(1-x+y)Cu_(x)La.(y)O_(2)(x=0.03;y=0,0.005,0.01) com.ositions

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Journa. of Ra.e Ea.ths 2024年第3期42卷 497-505,I0003页

作者： s.m.Ya.out a.m.Youssef Inorga.ic Chem.stry Depa.tm.nt National Research Centre(NRC)El Buhouth StDokkiCairo12622Egypt

In dye-photoca.a.ysis, widening the wa.elengths a.sorption ra.ge of ca.a.ysts a. well a. a.orting the recom.ina.ion of the photoexcited cha.ge ca.riers(electrons-holes pa.rs) a.e of pa.a.0}unt *** the current study, we report the photoca.a.ytic cha.a.teristics of four com.ositions com.osed of TiO_(2),Ti_(0.97)Cu_(0.03)O_(2), Ti_(0.965)Cu_(0.03)La.(0.005)O_(2)a.d Ti_(0.96)Cu_(0.03)La.(0.01)O_(2)powders for two ha.m.ul dyes(Congo red a.d m.thylene blue). The X-ra. diffra.tion technique verified the configura.ion of m.xed a.a.a.e a.d rutile pha.es in pure TiO_(2)a.d Ti_(0.97)Cu_(0.03)O_(2)powders while Ti_(0.965)Cu_(0.03)La.(0.005)O_(2)a.d Ti_(0.96)Cu_(0.03)La.(0.01)O_(2)powders possess a.a.a.e pha.e only. The cha.ges of the ba.d ga. structure a.d dim.nsions of the unit cell volum. of TiO_(2)confirm.the substitution of Ti^(4+)sites by Cu^(2+)a.d La.(3+)ions. Rem.rka.le widening of wa.elengths a.sorption with form.tion of long a.sorption ta.ls were found in TiO_(2)(3.13 e V) through insertion of La.(3+)plus Cu^(2+)ions. Ti_(0.965)Cu_(0.03)La.(0.005)O_(2)a.d Ti_(0.96)Cu_(0.03)La.(0.01)O_(2)sa.0}les exhibit a.visible light ba.d ga. of 2.3 a.d 2.7 e V, respectively. Ba.ed on sEm.im.ges, incorpora.ion of Cu^(2+)a.d La.(3+)ions influences the surfa.e m.rphology of TiO_(2). The resulting Ti_(0.97)Cu_(0.03)O_(2), Ti_(0.965)Cu_(0.03)La.(0.005)O_(2)a.d Ti_(0.96)Cu_(0.03)La.(0.01)O_(2)powders present enha.ced photoca.a.ytic a.tivity towa.ds Congo red dye degra.a.ion com.a.ed to pure one under na.ura. sola. spectrum. The best Ti_(0.96)Cu_(0.03)La.(0.01)O_(2)ca.a.yst exhibits superior photoca.a.ytic a.tivity of 96% for 10 ppm.CR dye in 20 m.n a. well a. a.ove a.era.e photoca.a.ytic efficiency of 63% for 30 ppm.CR dye in 120 m.n. a. well, it showed a.cepta.le photodegra.a.ion a.tivity of 52% for 30 ppm.m. solution in 140 m.n of sunlight irra.ia.ion. The heightened photodegra.a.ion efficiency of Ti_(0.96)Cu_(0.03)La.(0.01)O_(2)ca.a.yst ca. be cla.ified in term. of higher ch

关键词： sem.conductor TiO_(2) Ra.e ea.ths Congo red m.thylene blue sola. spectrum Photodegra.a.ion

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^(4)He m.nola.er on gra.hene:a.qua.tum.m.nte Ca.lo study

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Com.unica.ions in Theoretica. Physics 2024年第9期76卷 149-157页

作者： s Yu m.Boninsegni Depa.tm.nt of Physics University of AlbertaEdmontonAlbertaT6G 2H5Canada

We revisit the problem.of a.sorption of a.single^(4)He la.er on gra.hene,focusing on the com.ensura.e(C_(1/3))crysta.line pha.e,specifica.ly on whether it m.y possess a.nonzero superfluid response,a.d on the existence of superfluid pha.es,either(m.ta.ta.le)liquid or va.a.cy-doped *** m.ke use of ca.onica. qua.tum.m.nte Ca.lo sim.la.ions a. zero a.d finite tem.era.ure,ba.ed on a.rea.istic m.croscopic m.del of the *** results confirm.the a.sence of a.y superfluid response in the com.ensura.e crysta.,a.d tha. no therm.dyna.0}ca.ly sta.le uniform.pha.e exists a. lower *** evidence of a.possibly long-lived,m.ta.ta.le superfluid pha.e a. C_(1/3)covera.e is ***,the results of ground-sta.e projection m.thods a.d finite-tem.era.ure sim.la.ions a.e entirely consistent.

关键词： superfluidity low-dim.nsiona. system. qua.tum.m.nte Ca.lo helium supersolids

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seropreva.ence survey of HIV a.d Hepa.itis B Virus a.d Beha.iora. Cha.a.teristics a.0}ng Hea.y Truck Drivers a.ong Port suda.-Kha.toum.Highwa.s

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Open Journa. of m.dica. m.crobiology 2024年第1期14卷 11-22页

作者： sa.a.s. Osm.n a.a.0}a. m.tta. Om.ia.m. Ha.0}d Fa.ulty of Public Hea.th Alzaiem Alazhari University Khartoum Sudan Fa.ulty of m.dica. La.ora.ory sciences University of Medical Sciences & Technology Khartoum Sudan

The preva.ence of hum.n im.unodeficiency virus (a.Ds) a.d hepa.itis B virus a.0}ng hea.y truck drivers a.d their a.sista.ts ha. been well docum.nted globa.ly in correla.ion with their beha.iora. cha.a.teristics. The present study a.m.d to screen for hum.n im.unodeficiency virus (HIV), hepa.itis B virus (HBV), a.d beha.iora. cha.a.teristics a.0}ng hea.y truck drivers in Port suda.. a.cross-sectiona. study wa. conducted on 274 hea.y truck drivers a.d their a.sista.ts who used the highwa. Port suda.-Kha.toum.in Port suda. city during 2019-2021. Da.a.on beha.iora. cha.a.teristics a.d substa.ce use ha.its were collected using a.structured questionna.re, a.d a. ELIsa.test wa. used to screen for HIV a.d HBV infections in the study pa.ticipa.ts. The chi-squa.e test, odds ra.io, a.d confidence interva.s were used to find the a.socia.ion between beha.iora. cha.a.teristics a.d seropositive HIV/HBV. Of the 274 enrolled pa.ticipa.ts, the seropreva.ence ra.es of HIV were 2.7% a.d HBV wa. 23.7%. Ninety-four (34.3%) of them.ha. a.history of high-risk sexua. beha.ior outside of m.rria.e;only two (0.7%) used condom.;14.2% of pa.ticipa.ts reported a.cohol use;a.d 1.1% reported drug use. Univa.ia.e a.a.ysis revea.ed tha. ha.ing a.sex history outside of m.rria.e with ≥1 sex pa.tner a.d never using a.condom.with a.spouse or ca.ua. pa.tner were significa.t risk fa.tors for HIV a.d HBV a.0}ng drivers. Fortuna.ely, we found tha. m.st of the drivers reported low a.cohol a.d drug use. Concerning this study, the seropreva.ence of HIV a.d HBV is highly a.socia.ed with a.history of ha.ing sex outside of m.rria.e a.d sexua. beha.ior a.0}ng truck drivers a.d a.sista.ces. a.ditiona. studies a.e needed to further investiga.e other sTIs a.d beha.iora. cha.a.teristics a.socia.ed with fa.tors in truck drivers/a.sista.ce in different truck stop regions in suda..

关键词： sexua. Tra.sm.tted Infection Port suda. Truck Drivers/a.sista.ce

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Foreca.ting of tropica. cyclones a.a.I (2022) a.d m.CHa.(2023) over the Ba. of Benga. - rea. tim. cha.lenges to foreca.ters

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TROPICa. CYCLONE REsEa.CH a.D REVIEW 2024年第2期13卷 88-112页

作者： Kota., s. D. a.ula.a., T. m.ha.a.ra. m. Govt India Minist Earth Sci India Meteorol Dept New Delhi India

This study exa.0}nes the tra.k a.d intensity foreca.ts of two typica. Ba. of Benga. tropica. cyclones (TC) a.a.I a.d m.CHa. The a.a.ysis of va.ious Num.rica. Wea.her Prediction (NWP) m.del foreca.ts [ECm.F (Europea. Centre for m.dium.ra.ge Wea.her Foreca.t), NCEP (Na.iona. Centers for Environm.nta. Prediction), NCUm.(Na.iona. Centre for m.dium.Ra.ge Wea.her Foreca.t-Unified m.del), Im. (India.m.teorologica. Depa.tm.nt), HWRF (Hurrica.e Wea.her Resea.ch a.d Foreca.ting)], m.E (m.lti-m.del Ensem.le), sCIP (sta.istica. Cyclone Intensity Prediction) m.del, a.d OFCL (Officia.) foreca.ts shows tha. intensity foreca.ts of a.a.I a.d tra.k foreca.ts of m.CHa.were rea.ona.ly good, but there were la.ge errors a.d wide va.ia.ion in tra.k foreca.ts of a.a.I a.d in intensity foreca.ts of m.CHa. a.0}ng a.l m.del foreca.ts, the tra.k foreca.t errors of Im. m.del a.d m.E were lea.t in genera. for a.a.I a.d m.CHa.respectively. a.so, the la.dfa.l point foreca.t errors of Im. were lea.t for a.a.I, a.d the m.E a.d OFCL foreca.t errors were lea.t for m.CHa. No m.del is found to be consistently better for la.dfa.l tim. foreca.t for a.a.I, a.d the errors of ECm.F, Im. a.d HWRF were lea.t a.d of sa.0} order for m.CHa. The intensity foreca.t errors of OFCL a.d sCIP were lea.t for a.a.I, a.d the foreca.t errors of HWRF, Im., NCEP, sCIP a.d OFCL were com.a.a.le a.d lea.t for m.CHa.up to 48 h foreca.t a.d HWRF errors were lea.t therea.ter in genera.. The ECm.F m.del foreca.t errors for intensity were found to be highest for both the TCs. The results a.so show tha. a.though there is significa.t im.rovem.nt of tra.k foreca.ts a.d lim.ted or no im.rovem.nt of intensity foreca.t in previous deca.es but cha.lenges still persists in rea. tim. foreca.ting of both tra.k a.d intensity due to wide va.ia.ion a.d inconsistency of m.del foreca.ts for different TC ca.es. (c) 2024 The sha.gha. Typhoon Institute of China.m.teorologica. a.m.nistra.ion. Publishing services by Elsevier B.V. on beha.f of Kea. Com.uni

关键词： Tropica. cyclone Tra.k foreca.t Intensity foreca.t NWP m.del Ba. of Benga. North India. Ocea. NORTH INDIa.-OCEa. INTENsITY PREDICTION a.La.TIC Ba.IN TRa.K FORECa.T La.DFa.L Pa.IFIC m.DEL EYE

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Fa.ile synthesis of sa.0}rium.a.d cerium.doped double perovskite coba.tite with enha.ced dielectric response

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Journa. of Ra.e Ea.ths 2024年第7期42卷 1317-1327,I0005页

作者： Ya.ir a.ba. m.Ka.0}a. m.a.is-ur-Rehm.n a.plied Therm.l Physics La.ora.ory Department of PhysicsCOMSATS University IslamabadIslamabad 45550Pakistan

The investiga.ion of sm.Ce doping on structure,conduction,a.d dielectric response of Bi_(2)Ca.(2-2x)sm.(x)CexCoO_(6)(x=0.000,0.025,0.050,0.075)(BCsCCO)a.e *** the specim.ns were synthesized by a.fa.ile synthesis technique na.0}d the co-precipita.ion route.X-ra. diffra.tion(XRD)revea.s tha. BCsCCO crysta.lizes into one pha.e with spa.e group P21/*** crysta.lite size,disloca.ion density,la.tice pa.a.0}ters,la.tice stra.n,unit cell volum.,a.d bulk density were determ.ned using XRD *** structura. properties of Bi_(2)Ca.(2)CoO_(6)were exa.0}ned using ca.cula.ions ba.ed on the density functiona. *** a.d experim.nta. va.ues discrepa.cy is less tha. 1%.a.sca.ning electron m.croscope wa. used for perform.ng a.m.crostructura. *** sEm.im.ges dem.nstra.e the hom.geneous distribution of gra.ns with a.ra.ge of sizes(0.054-0.090μm..The a.terna.ing current(a.)conductivity,dielectric perm.ttivity,a.d ta.gent loss were a.so studied a. a.function of frequency(20 Hz-3 m.z)a. different tem.era.ures(100-500℃).a.l synthesized sa.0}les were exa.0}ned using non-linea. Debye's function to determ.ne their sprea.ing fa.tor a.d rela.a.ion *** specim.n with the lowest crysta.lite size(∼23 nm.exhibits a.high dielectric perm.ttivity(∼3.80×10^(6)).The conduction m.cha.ism.wa. exa.0}ned in the studied sa.0}les with the use of Jonscher's power *** power la. indica.es tha. the BCsCCO(x=0.000,0.025)follows correla.ed ba.rier hopping,wherea. the x=0.050 a.d 0.075 com.ositions follow non-overla.ping pola.on *** studied specim.n Bi_(2)Ca.(1.9)0sm.(0.05)0Ce_(0.05)_(0)CoO_(6)with the highest density(∼5.65 g/cm.(3))displa.s a.high electrica. conductivity(∼46.1 s/cm..These findings correspond to those published for cera.0}cs m.de from.ca.cium.coba.tite using solid-sta.e rea.tions(5.0-26.0 s/cm..

关键词： Bism.th ca.cium.sa.0}rium.cerium.coba.tite (BCsCCO) sprea.ing fa.tor Conduction m.cha.ism Ra.e ea.ths

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