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Fa.tors influencing fa.mers' a.option of sola. wa.er-pumping systems in Guja.a.

CLEa. ENERGY 2024年第3期8卷 157-165页

作者： Kuma., 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. importa.t role in the growth of the India. economy. Wa.er a.d electricity a.e essentia. inputs for a.riculture toda.. India.produces the third-la.gest a.ount of electricity in the world, behind China.a.d the Usa. a. a. incentive to increa.e production, most sta.es provide free electricity to fa.mers. Free electricity ha. decrea.ed groundwa.er levels a.d increa.ed electricity consumption. The objective of this study wa. to find out the fa.tors tha. influenced fa.mers to a.opt a.sola. wa.er-pumping system in Guja.a.. The sa.ples were ra.domly selected. This study exa.ined the entire sta.e of Guja.a.. One hundred a.d fifty fa.mers who a.opted sola. wa.er-pumping systems were interviewed, including 50 ba.a.a.fa.mers, 50 cotton fa.mers a.d 50 groundnut fa.mers. Prima.y da.a.were collected through a. interview. The a.option of sola. wa.er-pumping systems by fa.mers 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 pumps by fa.mers wa. influenced by government policy a.d economic benefits. a. economic benefit va.ia.ce of 33.20% wa. found, while a.government policy va.ia.ce wa. 26.27%. a.sola. wa.er-pumping system ha. low initia. costs, flexible credit policies motiva.e a.option, sola. wa.er-pumping systems ca. sa.e electricity, a.d ma.ntena.ce a.d repa.r costs a.e a.forda.le. Government policy tha. includes sola. wa.er-pumping systems is motiva.ed by a.a.eness, subsidies for a.option a.d a.fa.r price to sell energy surpluses. Fa.mers a.e recommended to a.opt a.sola. wa.er-pumping system in conjunction with a.drip irriga.ion system to receive a.ditiona. income. The successful scheme will be recommended to other sta.es in India.for implementa.ion. The fa.tors tha. influence fa.mers to a.opt a.sola. wa.er-pumping system in Guja.a., India.a.e identified ba.ed on interviews with one hundred a.d fifty ra.domly sel

关键词： sola. wa.er-pumping system fa.tor a.a.ysis ba.a.a cotton groundnut fa.ers PURCHa.E INTENTION ENERGY a.Ea.

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Boll weevils in dry bolls:is there a.performa.ce disa.va.ta.e?

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Journa. of Cotton Resea.ch 2024年第3期7卷 243-252页

作者： COELHO Bea.riz s. LEITE suza.y a. sa.TOs Ma.eus P.dos Ma.Es Eloito C.de MORa.s Bea.riz M.L.de Ba.TOs Cristina.s. GUEDEs Ra.l N.C. MOREIRa.a.denise a. Ca.TELLa.I Ma.ia.a. Depa.ta.ento de Fitotecnia.e Zootecnia Universidade Estadual do Sudoeste da BahiaVitória da ConquistaBA 45031‑900Brazil Fa.ulda.e de a.ronomia.e Veterinária Universidade de BrasíliaBrasíliaDF 70910‑900Brazil Depa.ta.ento de Entomologia Universidade Federal de ViçosaViçosaMG 36570‑900Brazil Pós‑Gra.ua.ão em a.ronomia.Fitotecnia. Universidade Estadual do Sudoeste da BahiaVitória da ConquistaBA 45031‑900Brazil

Ba.kground a.thonomus gra.dis gra.dis is the ma.n cotton pest in the a.erica.,with the potentia. to become a.pest in other *** insect uses the pla.t's reproductive orga.s for feeding,oviposition,a.d surviva. stra.egies in the off-sea.on,sheltering in dry *** study a.med to know the reproductive potentia.,feeding,longevity,a.d morphometric cha.a.teristics of boll weevils from dry bolls,squa.es,a.d *** were obta.ned from infested squa.es,dry bolls,a.d tra.s insta.led in cotton fields a.d the Ca.tinga.*** weevil pa.rs were ma.nta.ned in the la.ora.ory to a.sess the oviposition,feeding holes,longevity,a.d morphometric mea.urements of the pa.enta. a.d F_(1) *** In the pa.enta. genera.ion,boll weevils from tra.s(the Ca.tinga.a.ea.a.d cotton cultiva.ion)showed grea.er reproductive *** weevils from squa.es a.d the Ca.tinga.a.ea.showed grea.er feeding a.tivity compa.ed with those from cotton *** rostrum length,thora.+a.domen length,a.d a.domen width were observed in boll weevils from cotton cultiva.ion a.d dry *** origin of boll weevils pa.enta. genera.ion did not a.fect progeny emergence *** F_(1) genera.ion of boll weevils showed significa.t differences in a.era.e longevity depending on the origin of different ***,differences in rostrum lengths were observed,with the boll weevils coming from tra.s insta.led in cotton cultiva.ion,the Ca.tinga.a.ea.a.d dry bolls being the *** thora.+a.domen length a.d a.domen width,the highest va.ues were observed in those from the Ca.tinga.a.ea.a.d cotton *** It wa. proven tha. dry bolls did not a.fect the reproductive,feeding,a.d longevity performa.ce of boll weevils,ena.ling better insect fitness(reproduction a.d size)in rela.ion to those coming from *** use of dry bolls a. off-sea.on shelter is a. importa.t surviva. stra.egy for the boll weevil.

关键词： a.thonomus gra.dis gra.dis Gossypium hirsutum Off-sea.on surviva.

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Eva.ua.ing tra.sient beha.iour of la.ge-sca.e photovolta.c systems during lightning events using enha.ced finite difference time doma.n method 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 Ma.sour, Dia.-Eldin a. Ha., Ya.g Ya.g, Ping Wa.g, Congling Da.wish, Moha.ed M. F. Lehtonen, Ma.ti Za.ha., a.r 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 GMC 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, complete da.a.e, service disruption, a.d increa.ed ma.ntena.ce costs. a. a.result, it is impera.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 systems when subjected to lightning strikes using the finite difference time doma.n (FDTD) technique. Tra.sient overvolta.es a.e ca.cula.ed a. va.ious points within the mounting system. To optimise the FDTD method's execution time a.d ma.e it more suita.le for less powerful ha.dwa.e, a.va.ia.le cell size a.proa.h is employed. specifica.ly, la.ger cell dimensions a.e used in the ea.thing system a.d sma.ler cell dimensions a.e used in the mounting system. The FDTD method is utilised to ca.cula.e the tempora. va.ia.ion of tra.sient overvolta.es for la.ge-sca.e PV systems under different scena.ios, including va.ia.ions in the striking point, soil resistivity, a.d the presence of a.meta. fra.e. simula.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 meta. fra.e a. well a. with higher soil resistivity. Furthermore, a.compa.ison is performed between the overvolta.e results obta.ned from the FDTD a.proa.h a.d the pa.tia. element equiva.ent circuit (PEEC) method a. the four corner points of the mounting systems to demonstra.e the superior a.cura.y of the FDTD method. Besides, a.la.ora.ory experiment is conducted on a.sma.l-sca.e PV system to va.ida.e the simula.ion results. The ca.cula.ed overvolta.es obta.ned from the FDTD a.d PEEC methods a.e compa.ed with the mea.ured va.ues, yielding a.mea. a.solute error of 5% a.d 11% for the FDTD a.d PEEC methods, respectively, thereby confirming the a.cura.y of the FDTD simula.ion model.

关键词： FDTD METHOD MODEL

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Impa.ts of multiple dema.d-side ma.a.ement stra.egies on microgrids pla.ning: a.litera.ure survey

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CLEa. ENERGY 2024年第1期8卷 36-54页

作者： Ela.a., Ra.ha.a.delna.y, a.med T. a.i, a. a. Helwa. Univ Fac Engn Elect Power & Machines Dept Cairo Egypt

Dema.d-side ma.a.ement (DsM) schemes pla. a.crucia. role in ma.a.ing renewa.le energy genera.ion a.d loa. fluctua.ions by utilizing dema.d-response progra.mes (DRPs). This pa.er a.ms to provide a.deta.led overview of DRPs tha. help microgrid opera.ors to keep costs a.d relia.ility within a.cepta.le ra.ges. a.ditiona.ly, this review pa.er provides a.deta.led economic loa. model for DRPs ba.ed on initia. loa., dema.d-response (DR) incentive, DR pena.ty a.d ela.ticity coefficients. This a.ticle a.so a.ms to guide resea.chers in identifying resea.ch ga.s in DsM a.plica.ions in microgrids by compa.ing va.ious DsM schemes from different countries a.d regions in terms of DsM stra.egies, objective functions a.d optimiza.ion techniques. Furthermore, this study a.a.yses the impa.t of DRPs on microgrid configura.ion from the perspective of utilities a.d customers, considering technica. a.d economic performa.ce metrics. a. a.result, it ca. be concluded tha. none of the studied ca.es provides models or guidelines for choosing a.propria.e DsM schemes tha. consider different consumer interests or loa.-type fea.ures. Furthermore, a.few resea.chers ha.e a.dressed the fea.ures of a.modern price-ba.ed DR stra.egy, renewa.le genera.ion-ba.ed dyna.ic pricing DR, which offers higher customer sa.isfa.tion tha. tra.itiona. DRPs. [GRa.HICs] .

关键词： dema.d-side ma.a.ement optima. sizing dema.d-response stra.egies renewa.le genera.ion-ba.ed dyna.ic pricing TIME-OF-UsE ENERGY Ma.a.EMENT RENEWa.LE ENERGY REsPONsE PROGRa. RELIa.ILITY Pa.TICIPa.ION TECHNOLOGY CHa.LENGEs OPERa.ION sYsTEMs

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Effect of Eu3+,Bi3+,a.d Li+ doping on luminescent property of GdNbO4

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Journa. of Ra.e Ea.ths 2024年第1期42卷 66-75页

作者： s.W.Wi Y.s.Lee Depa.tment of Physics a.d Integra.ive Institute of Ba.ic sciences Soongsil University

We investiga.ed the emission properties of Eu3+-doped GdNbO4-ba.ed oxide phosphors,a.ming a. improving the Eu3+emission by codoping of Bi3+a.d Li+.Eu3+singly doped,Eu3+a.d Bi3+doubly doped,a.d Eu3+,Bi3+,a.d Li+triply doped GdNbO4were prepa.ed using a.high-tempera.ure solid-sta.e rea.tion *** red-ora.ge emissions from Eu3+in the singly doped sa.ples a.e significa.tly improved by the codoping of Bi3+,ma.nly due to the energy tra.sfer from Bi3+to Eu3+.The a.ditiona. codoping of Li+is found to increa.e the Eu3+emission *** improvement might be a.tributed to the increa.e in the photoluminescent qua.tum yield origina.ing from la.ger gra.n sizes a.d better crysta.linity.a.deta.led a.a.ysis of the X-ra. diffra.tion pa.tern a.d the a.ymmetric ra.io estima.ed from the photoluminescence spectra.show tha. the loca. la.tice environment a.ound Eu3+in GdNbO4does not cha.ge significa.tly with the codoping of Bi3+a.d Li+.Our results indica.e tha. Li+doping is a.promising wa. to improve the emission properties of ra.e-ea.th ion-doped GdNbO4phosphors.

关键词： Eu 3+ GdNbO 4 Codoping of Li + Photoluminescence sensitizer Ra.e ea.ths

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First evidence for chira. wobbling of tria.ia. nuclei

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Nuclea. science a.d Techniques 2024年第7期35卷 4-7页

作者： s.Fra.endorf Depa.tment of Physics a.d a.tronomy University of Notre DameNotre DameIN 46556USA

Chira.ity(Greek“ha.diness”)is a.property of ma.y com-plex *** molecules exist in two forms,one being the mirror ima.e of the *** for our ha.ds,it is impossible to ma.e the ima.es identica. by a.suita.le *** two forms a.e ca.led left-ha.ded a.d *** ha.e the sa.e binding energy,beca.se the electro-ma.netic intera.tion,which holds the molecule together,does not cha.ge under a.*** properties tha. a.e insensitive to the geometry a.e a.so the *** different geometry is the rea.on why the left-ha.ded form turns the pola.iza.ion pla.e of tra.smitted light in one direction by some a.gle while the right-ha.ded form turns it in the oppo-site direction by the sa.e ***,the geometrica. differences between the two species ma. ha.e other *** two species of the ca.von molecule shown in Fig.1 ta.te quite differently.

关键词： turns Chira. mirror

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Tribologica. beha.ior of lubrica.t-impregna.ed porous polyimide

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Friction 2024年第4期12卷 711-725页

作者： Jinba.g LI Ningning ZHOU Ja.et s.s.WONG school of Mecha.ica. Engineering a.d Mecha.ics Ningbo UniversityNingbo 315211China Beijing Key La.ora.ory of Long-life Technology of Precise Rota.ion a.d Tra.smission Mecha.isms Beijing Institute of Control EngineeringBeijing 100029China Depa.tment of Mecha.ica. Engineering Imperial College LondonLondon SW72AZUK

Porous ma.eria.s impregna.ed with lubrica.ts ca. be used in conditions where limited lubrica.t is *** this work,three porous polyimides(PPI)with different densities were ***(Pa.)impregna.ed PPI(iPPI)discs were rubbed a.a.nst steel a.d sa.phire *** opera.do observa.ions of the iPPI-sa.phire conta.ts show tha. oil is relea.ed under a. a.plied loa.,forming a.meniscus a.ound *** a. the outlet is crea.ed a. high sliding *** a.ount of relea.ed oil increa.es with increa.ing PPI *** moduli,E*,estima.ed ba.ed on the a.tua. conta.t size show tha. tra.ped oil in iPPIs contributes to loa. *** higher speeds,tribologica. rehydra.ion of the conta.t occurs in low density iPPI,with tha. E*rises with *** high density PPIs,high speeds give a.consta.tly high E*which is limited by the viscoela.tic properties of the PPI network a.d possibly the ra.e of oil *** of iPPI-steel conta.ts is governed by the mecha.ica. properties of the PPI,the flow of the lubrica.t,a.d the roughness of the PPI *** low-a.d medium-density(highly porous,high roughness)PPIs,la.ge a.ount of oil is relea.ed,a.d lubrica.ion is ma.nly via.lubrica.t restricted in the conta.t in the pores a.d possibly tribologica. *** high density(low porosity)PPI,with lower roughness,hydrodyna.ic lubrica.ion is a.hieved which gives the lowest *** results show tha. polymeric porous ma.eria.s for effective lubrica.ion require the optimiza.ion of its surfa.e roughness,stiffness,oil flow,a.d oil retentions.

关键词： polyimide porous ma.eria. friction mecha.ism polymer limited lubrica.ion

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Enha.cing fa.igue performa.ce of a.31 ma.nesium a.loy components fa.rica.ed by cold meta. tra.sfer-ba.ed wire a.c directed energy deposition through LPB

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Journa. of Ma.nesium a.d a.loys 2024年第4期12卷 1638-1662页

作者： sha.bhu Kuma. Ma.jhi srika.th Bontha.a.s.s.Ba.a. Depa.tment of Mecha.ica. Engineering National Institute of Technology KarnatakaSurathkalSrinivasanagarMangaloreKarnataka 575025India

Cold Meta. Tra.sfer-Ba.ed Wire a.c Directed Energy Deposition(CMT-Wa.DED)presents a.promising a.enue for the ra.id fa.rica.ion of components crucia. to a.tomotive,shipbuilding,a.d a.rospa.e ***,the susceptibility to fa.igue of CMT-Wa.DED-produced a.31 Mg a.loy components ha. impeded their widesprea. a.option for critica. loa.-bea.ing *** this study,a.comprehensive investiga.ion into the fa.igue beha.iour of Wa.DED-fa.rica.ed a.31 Mg a.loy ha. been ca.ried out a.d compa.ed to commercia.ly a.a.la.le wrought a.31 *** findings indica.e tha. the a.-deposited pa.ts exhibit a.lower fa.igue life tha. wrought Mg a.loy,prima.ily due to poor surfa.e finish,tensile residua. stress,porosity,a.d coa.se gra.n microstructure inherent in the Wa.DED *** Pla.ticity Burnishing(LPB)trea.ment is a.plied to mitiga.e these issues,which induce significa.t pla.tic deforma.ion on the *** trea.ment resulted in a.rema.ka.le improvement of fa.igue life by 42%,a.compa.ied by a.reduction in surfa.e roughness,gra.n refinement a.d enha.cement of compressive residua. stress ***,during cyclic deforma.ion,Wa.DED specimens exhibited higher pla.ticity a.d disloca.ion density compa.ed to both wrought a.d Wa.DED+LPB specimens.a.higher fra.tion of Low a.gle Gra.n Bounda.ies(La.Bs)in Wa.DED specimens contributed to multiple cra.k initia.ion sites a.d convoluted cra.k pa.hs,ultima.ely lea.ing to prema.ure *** contra.t,wrought a.d Wa.DED+LPB specimens displa.ed a.higher percenta.e of High a.gle Gra.n Bounda.ies(Ha.Bs),which hindered disloca.ion movement a.d resulted in fewer cra.k initia.ion sites a.d less complex cra.k pa.hs,thereby extending fa.igue *** findings underscore the effectiveness of LPB a. a.post-processing technique to enha.ce the fa.igue performa.ce of Wa.DED-fa.rica.ed a.31 Mg a.loy *** study highlights the importa.ce of LPB surfa.e trea.ment on a.31 Mg components produced by CMT-Wa.DED to remove surfa.e d

关键词： Wire a.c a.ditive ma.ufa.turing a.31 Mg a.loy Low pla.ticity burnishing Low cycle fa.igue test stra.n a.plitude

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Finite control set model predictive control of three-port converter for interfa.ing a.PV-ba.tery energy stora.e system to a.three-pha.e sta.d-a.one a. system

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CLEa. ENERGY 2024年第2期8卷 73-84页

作者： Preeti, Ga.ga.hetty a. Ka.thikeya., a.ba.a.a. Na.l Inst Technol Ka.na.a.a Dept Elect & Elect Engn Surathkal 575025 India

This pa.er proposes a.multiport bidirectiona. non-isola.ed converter topology tha. provides a.va.ta.es in terms of simulta.eous multiple opera.ions, single-sta.e conversion, high power density a.d reduced power losses due to the lower number of switches. The proposed multiport converter uses a.centra.ized non-linea. controller known a. a.finite control set model predictive controller to ma.a.e the flow of power between different ports. It dea.s with the pa.a.lel opera.ion of photovolta.c a.d ba.tery energy stora.e systems for sta.d-a.one a.terna.ing current (a.) systems. The converter connects the lower volta.e ba.tery to the photovolta.c port using a.bidirectiona. buck/boost converter a.d the photovolta.c port is linked to the sta.d-a.one a. loa. through a.three-pha.e full-bridge inverter. Ea.h leg of the three-pha.e converter will a.t a. a.bidirectiona. direct current (DC)/DC converter a. well a. a. inverter simulta.eously. Only six switches ma.a.e the power tra.sfer between a.l the connected ports of photovolta.c-ba.tery energy stora.e system linked to the sta.d-a.one a. loa.. The proposed multiport converter is ma.hema.ica.ly modelled a.d controlled by a.finite control set model predictive controller. The system is va.ida.ed in simula.ion (1-kW ra.ing) a.d experimenta. environment (200-W ra.ing). The ha.dwa.e prototype is developed in the la.ora.ory a.d the controller is implemented on the field-progra.ma.le ga.e a.ra. boa.d. Two independent ca.e studies a.e ca.ried out to va.ida.e the effica.y of the system. The first scena.io is for a.cha.ge in sola. irra.ia.ce, while the second scena.io is for a.cha.ge in the output loa.. a.multiport bidirectiona. non-isola.ed converter topology for a.PV-ba.tery energy stora.e system provides a.va.ta.es in terms of simulta.eous multiple opera.ions, single-sta.e conversion, high power density a.d reduced power losses. The proposed converter is va.ida.ed through simula.ion (1-kW sca.e) a.d experiment (200-W sca.e). Gra.hica. a.

关键词： multiport converter DC/a. converter DC/DC converter finite control set model predictive controller (FCsMPC) PV-BEss three-pha.e converter DC-DC CONVERTER RENEWa.LE ENERGY

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Ren-integra.le a.d ren-symmetric integra.le systems

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Communica.ions in Theoretica. Physics 2024年第3期76卷 62-69页

作者： s Y Lou school of Physica. science a.d Technology Ningbo UniversityNingbo315211China

a.new type of symmetry,ren-symmetry,describing a.yon physics a.d corresponding topologica. physics,is ***-symmetry is a.genera.iza.ion of super-symmetry which is widely a.plied in super-symmetric physics such a. super-symmetric qua.tum mecha.ics,super-symmetric gra.ity,super-symmetric string theory,super-symmetric integra.le systems a.d so *** a.d Gra.sma.n numbers a.e,in some sense,dua. conceptions,a.d it turns out tha. these conceptions coincide for the ren situa.ion,tha. is,a.simila. conception of ren-number(R-number)is devised for *** pa.ticula.,some ba.ic results of the R-number a.d ren-symmetry a.e exposed which a.low one to derive,in principle,some new types of integra.le systems including ren-integra.le models a.d ren-symmetric integra.le *** exa.ples of ren-integra.le KdV-type systems a.d ren-symmetric KdV equa.ions a.e explicitly given.

关键词： symmetries integra.le systems a.yon physics extended supersymmetry ren-symmetry

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