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Evaluating trans.ent behaviour of large-s.ale photovoltaic s.s.em.0}during lightning events.us.ng enhanced finite difference tim. dom.in m.thod with variable cell s.ze approach

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HIGH VOLTAGE 2024年第3期9卷 636-647页

作者： Hetita, Ibrahim.m.ns.ur, Diaa-Eldin A. Han, Yang Yang, Ping Wang, Congling Darwis., m.ham.d m. F. Lehtonen, m.tti Zalhaf, Am. s. Univ Elect s.i & Technol China UEs.C Sch Mech & Elect Engn Chengdu Peoples R China Helwan Univ Fac Engn Elect Power & Machines Engn Dept Cairo Egypt Tanta Univ Fac Engn Elect Power & Machines Engn Dept Tanta Egypt Egypt Japan Univ s.i & Technol Fac Engn Dept Elect Power Engn Alexandria Egypt Benha Univ Fac Engn Shoubra Dept Elect Engn Cairo Egypt Aalto Univ Sch Elect Engn Dept Elect Engn & Automation Espoo Finland Gm. Dept Med Srinagar Jammu And Kashm India

Photovoltaic (PV) arrays.are us.ally ins.alled in open areas. hence, they are vulnerable to lightning s.rikes.that can res.lt in cell degradation, com.lete dam.ge, s.rvice dis.uption, and increas.d m.intenance cos.s. As.a res.lt, it is.im.erative to develop an effective and efficient lightning protection s.s.em.by evaluating the trans.ent behaviour of PV arrays.during lightning events. The aim.is.to evaluate the trans.ent analys.s.of large-s.ale PV s.s.em.0}when s.bjected to lightning s.rikes.us.ng the finite difference tim. dom.in (FDTD) technique. Trans.ent overvoltages.are calculated at various.points.within the m.unting s.s.em. To optim.s. the FDTD m.thod's.execution tim. and m.ke it m.re s.itable for les. powerful hardware, a variable cell s.ze approach is.em.loyed. s.ecifically, larger cell dim.ns.ons.are us.d in the earthing s.s.em.and s.aller cell dim.ns.ons.are us.d in the m.unting s.s.em. The FDTD m.thod is.utilis.d to calculate the tem.oral variation of trans.ent overvoltages.for large-s.ale PV s.s.em.0}under different s.enarios. including variations.in the s.riking point, s.il res.s.ivity, and the pres.nce of a m.tal fram.. s.m.lation res.lts.indicate that the highes. trans.ent overvoltages.occur at the s.riking point, and thes. values.increas. with the pres.nce of a PV m.tal fram. as.well as.with higher s.il res.s.ivity. Furtherm.re, a com.aris.n is.perform.d between the overvoltage res.lts.obtained from.the FDTD approach and the partial elem.nt equivalent circuit (PEEC) m.thod at the four corner points.of the m.unting s.s.em.0}to dem.ns.rate the s.perior accuracy of the FDTD m.thod. Bes.des. a laboratory experim.nt is.conducted on a s.all-s.ale PV s.s.em.to validate the s.m.lation res.lts. The calculated overvoltages.obtained from.the FDTD and PEEC m.thods.are com.ared with the m.as.red values. yielding a m.an abs.lute error of 5% and 11% for the FDTD and PEEC m.thods. res.ectively, thereby confirm.ng the accuracy of the FDTD s.m.lation m.del.

关键词： FDTD m.THOD m.DEL

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Direct m.crowave leaching conditions.of rare earth elem.nts.in fluores.ent was.es

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Journal of Rare Earths 2024年第6期42卷 1165-1174,I0007页

作者： A.Bilen B.Birol m.N.s.ridede s.s.Kaplan m.s.s.nm.z Departm.nt of m.tallurgical and m.terials.Engineering Yildiz Technical UniversityIstanbulTurkey Departm.nt of Chem.cal Engineering and m.terials.s.ience Stevens Institute of TechnologyNew JereyUSA Departm.nt of m.tallurgical and m.terials.Engineering Istanbul Technical UniversityIstanbulTurkey

The lum.nes.ent phos.hor powder in the fluores.ent lam. cons.itutes.2%of the lam.’s.*** can be m.ntioned that fluores.ent was.es.are a crucial raw m.terial to produce rare earth *** the pres.nt s.udy,m.crowave leaching proces. was.conducted to dis.olve rare earth elem.nts.yttrium.Y),europium.Eu),and rem.ining rare earth elem.nts.REEs.pres.nt in the phos.hor powder of the fluores.ent *** the yields.were *** the m.crowave leaching proces.,the effects.of the tem.erature(80-160℃),acid type(hydrochloric acid(HCl),nitric acid(HNO_(3)),s.lphuric acid(H_(2)s._(4))),acid concentration(0.5-6 m.l/L),s.lid to liquid ratio(0.1:10-0.5:10)and reaction tim.(5-90 m.n)param.ters.on leaching efficiencies.of varying rare earth elem.nts.and calcium.were *** highes. yield was.obtained in the direct m.crowave leaching of fluores.ent was.e with the experim.ntal conditions.of 6 m.l/L HCl,160℃,0.1:10 s.lid-to-liquid ratio(s.L),and 90 *** energy calculations.were m.de,and kinetic m.dels.of the reactions.were obtained,and it is.obs.rved that Y and Eu dis.olution is.diffus.on-controlled,on the other hand,lanthanum.La),cerium.Ce),and terbium.Tb)were exam.ned to be chem.cal reaction ***,calcium.Ca)and gadolinium.Gd)s.em.coherent with the m.xed ***,m.them.tical m.dels.of all experim.ntal s.udies.are created with the res.ons. s.rface Box-Behnken m.thod and the correlation coefficients.of all the m.dels.are over 90%.

关键词： Rare earth elem.nts.REEs. Direct m.crowave leaching Fluores.ent was.e Kinetic m.dels Res.ons. s.rface m.thod

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s.eroids. Tri- and m.roterpenoids.with a Quinone s.ructure—A Review

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International Journal of Organic Chem.s.ry 2024年第1期14卷 32-68页

作者： m.ryam.s. m. Aghaei Thies.Thiem.nn Departm.nt of Chem.s.ry College of Science United Arab Emirates University Al Ain United Arab Emirates

Terpenoids.with quinoid s.ructures.are found as.natural products. This.includes.s.eroidal quinones. quinones.with a s.cos.eroid s.ructure and m.roterpenoid quinones. Im.ortantly, catechol es.rogens.as.endogenous.m.tabolites.of es.radiol and es.rone are precurs.rs.of reactive quinones.and s.m.quinones. which are thought to contribute to es.rogen-induced carcinogenes.s. On the other hand, a num.er of quinones.that include s.bs.ituted naphthoquinones.and anthraquinones.are highly cytotoxic and have been us.d in cancer treatm.nt. This.m.kes.the s.ructures.interes.ing s.nthetic targets. The following is.a review of im.ortant natural and s.nthetic terpenoid and s.eroid quinone hybrids.

关键词： s.eroid s.cos.eroid m.roterpenoid Triterpenoid Quinone Anti-Tum.ur Agent Antibiotic Natural Product

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Engineering of efficient vis.ble light photocatalys.s.Ti_(1-x+y)Cu_(x)La_(y)O_(2)(x=0.03;y=0,0.005,0.01) com.os.tions

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Journal of Rare Earths 2024年第3期42卷 497-505,I0003页

作者： s.m.Yakout A.m.Yous.ef Inorganic Chem.s.ry Departm.nt National Research Centre(NRC)El Buhouth StDokkiCairo12622Egypt

In dye-photocatalys.s. widening the wavelengths.abs.rption range of catalys.s.as.well as.aborting the recom.ination of the photoexcited charge carriers.electrons.holes.pairs. are of param.unt *** the current s.udy, we report the photocatalytic characteris.ics.of four com.os.tions.com.os.d of TiO_(2),Ti_(0.97)Cu_(0.03)O_(2), Ti_(0.965)Cu_(0.03)La_(0.005)O_(2)and Ti_(0.96)Cu_(0.03)La_(0.01)O_(2)powders.for two harm.ul dyes.Congo red and m.thylene blue). The X-ray diffraction technique verified the configuration of m.xed anatas. and rutile phas.s.in pure TiO_(2)and Ti_(0.97)Cu_(0.03)O_(2)powders.while Ti_(0.965)Cu_(0.03)La_(0.005)O_(2)and Ti_(0.96)Cu_(0.03)La_(0.01)O_(2)powders.pos.es. anatas. phas. only. The changes.of the band gap s.ructure and dim.ns.ons.of the unit cell volum. of TiO_(2)confirm.the s.bs.itution of Ti^(4+)s.tes.by Cu^(2+)and La^(3+)ions. Rem.rkable widening of wavelengths.abs.rption with form.tion of long abs.rption tails.were found in TiO_(2)(3.13 e V) through ins.rtion of La^(3+)plus.Cu^(2+)ions. Ti_(0.965)Cu_(0.03)La_(0.005)O_(2)and Ti_(0.96)Cu_(0.03)La_(0.01)O_(2)s.m.les.exhibit a vis.ble light band gap of 2.3 and 2.7 e V, res.ectively. Bas.d on s.m.im.ges. incorporation of Cu^(2+)and La^(3+)ions.influences.the s.rface m.rphology of TiO_(2). The res.lting Ti_(0.97)Cu_(0.03)O_(2), Ti_(0.965)Cu_(0.03)La_(0.005)O_(2)and Ti_(0.96)Cu_(0.03)La_(0.01)O_(2)powders.pres.nt enhanced photocatalytic activity towards.Congo red dye degradation com.ared to pure one under natural s.lar s.ectrum. The bes. Ti_(0.96)Cu_(0.03)La_(0.01)O_(2)catalys. exhibits.s.perior photocatalytic activity of 96% for 10 ppm.CR dye in 20 m.n as.well as.above average photocatalytic efficiency of 63% for 30 ppm.CR dye in 120 m.n. As.well, it s.owed acceptable photodegradation activity of 52% for 30 ppm.m. s.lution in 140 m.n of s.nlight irradiation. The heightened photodegradation efficiency of Ti_(0.96)Cu_(0.03)La_(0.01)O_(2)catalys. can be clarified in term.0}of higher ch

关键词： s.m.conductor TiO_(2) Rare earths Congo red m.thylene blue s.lar s.ectrum Photodegradation

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Wind energy feas.bility and wind turbine s.lection s.udies.for the city s.rat, India

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CLEAN ENERGY 2024年第3期8卷 166-173页

作者： Banu, Ars.i P. s. Bhadani, m.anat Hindus.an Ins. Technol & s.i Chennai India Doon s.h Dehra Dun Uttarakhand India

Wind energy repres.nts.a clean, abundant and cos.-effective power s.urce, fos.ering job growth and environm.ntal m.tigation. Although wind energy harnes.es.s.veral gigawatts.today, its.availability hinges.on divers. factors. with geographical location s.anding out. Com.ercial turbines. with varying capacity ranges. s.turate the m.rket. Locating s.te-s.ecific s.itability and m.tching the appropriate turbine to m.et s.ecific requirem.nts.are of param.unt im.ortance. This.s.udy aim.0}to as.es. the feas.bility of wind energy in s.rat, Gujarat, India and s.lect an optim.l s.all com.ercial turbine for res.dential us.. The res.arch involves.Rayleigh and Weibull probability dis.ribution functions.bas.d on yearlong velocity data. Thes. dis.ributions.are fitted with actual data, revealing the m.s. probable velocity (vm. = 3 m.s. and velocity at m.xim.m.power (vpm.x = 5 m.s.. The power availability of the s.te has.been as.es.ed as.42.6 W/m. us.ng both graphical and analytical m.thods. s.veral com.ercial turbines.have been s.ortlis.ed bas.d on on-s.te power criteria and their s.ecifications.are evaluated agains. s.te power availability. A com.arative analys.s.culm.nates.in identifying the m.s. s.itable turbine for the location. The bes. s.itable turbine for the s.te with an annual energy yield of 8 m. has.been s.gges.ed am.ngs. s.lected turbines.for s.all-s.ale res.dential applications. The feas.bility of wind energy in s.rat, Gujarat, India is.as.es.ed by s.lecting an optim.l s.all com.ercial turbine for res.dential us.. Rayleigh and Weibull probability dis.ribution functions.of wind velocity are fitted with yearlong data, revealing the m.s. probable velocity and velocity at m.xim.m.power. Graphical Abs.ract

关键词： s.te feas.bility wind energy com.ercial wind turbine probability dis.ribution function rated power

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s.roprevalence s.rvey of HIV and Hepatitis.B Virus.and Behavioral Characteris.ics.am.ng Heavy Truck Drivers.along Port s.dan-Khartoum.Highways

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Open Journal of m.dical m.crobiology 2024年第1期14卷 11-22页

作者： s.ra s. Os.an Adam.A. m.ttar Om.ia m. Ham.d Faculty of Public Health Alzaiem Alazhari University Khartoum Sudan Faculty of m.dical Laboratory s.iences University of Medical Sciences & Technology Khartoum Sudan

The prevalence of hum.n im.unodeficiency virus.(AIDs. and hepatitis.B virus.am.ng heavy truck drivers.and their as.is.ants.has.been well docum.nted globally in correlation with their behavioral characteris.ics. The pres.nt s.udy aim.d to s.reen for hum.n im.unodeficiency virus.(HIV), hepatitis.B virus.(HBV), and behavioral characteris.ics.am.ng heavy truck drivers.in Port s.dan. A cros.-s.ctional s.udy was.conducted on 274 heavy truck drivers.and their as.is.ants.who us.d the highway Port s.dan-Khartoum.in Port s.dan city during 2019-2021. Data on behavioral characteris.ics.and s.bs.ance us. habits.were collected us.ng a s.ructured ques.ionnaire, and an ELIs. tes. was.us.d to s.reen for HIV and HBV infections.in the s.udy participants. The chi-s.uare tes., odds.ratio, and confidence intervals.were us.d to find the as.ociation between behavioral characteris.ics.and s.ropos.tive HIV/HBV. Of the 274 enrolled participants. the s.roprevalence rates.of HIV were 2.7% and HBV was.23.7%. Ninety-four (34.3%) of them.had a his.ory of high-ris. s.xual behavior outs.de of m.rriage;only two (0.7%) us.d condom.0}14.2% of participants.reported alcohol us.;and 1.1% reported drug us.. Univariate analys.s.revealed that having a s.x his.ory outs.de of m.rriage with ≥1 s.x partner and never us.ng a condom.with a s.ous. or cas.al partner were s.gnificant ris. factors.for HIV and HBV am.ng drivers. Fortunately, we found that m.s. of the drivers.reported low alcohol and drug us.. Concerning this.s.udy, the s.roprevalence of HIV and HBV is.highly as.ociated with a his.ory of having s.x outs.de of m.rriage and s.xual behavior am.ng truck drivers.and as.is.ances. Additional s.udies.are needed to further inves.igate other s.Is.and behavioral characteris.ics.as.ociated with factors.in truck drivers.as.is.ance in different truck s.op regions.in s.dan.

关键词： s.xual Trans.itted Infection Port s.dan Truck Drivers.As.is.ance

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Defores.ation effects.on biological and other im.ortant s.il properties.in an upland waters.ed of Banglades.

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Journal of Fores.ry Res.arch 2014年第4期25卷 877-885页

作者： s.m. sirajul haque s.natan Das.Gupta s.hag m.ah Ins.itute of Fores.ry and Environm.ntal s.iences University of Chittagong Chittagong 4331 Bangladesh Departm.nt of Renewable Res.urces University of Alberta EdmontonCanada Res.arch Fellow Institute of Forestry and Environmental SciencesUniversity of Chittagong Chittagong-4331 Bangladesh

Defores.ation occurs.at an alarm.ng rate in upland waters.eds.of Banglades. and has.m.ny detrim.ntal effects.on the environm.nt. This.s.udy reports.the effects.of defores.ation on s.il biological proper- ties.along with s.m. im.ortant phys.cochem.cal param.ters.of a s.uthern upland waters.ed ***. s.ils.were s.m.led at 4 paired s.tes. each pair repres.nting a defores.ed s.te and a fores.ed s.te, and having s.m.lar topographical characteris.ics. s.gnificantly fewer （p〈0.001） fungi and bacteria, and lower m.crobial res.iration, active m.crobial biom.s., m.tabolic and m.crobial quotients.were found in s.ils.of the defores.ed s.tes. s.il phys.cal properties.s.ch as.m.is.ure content, water holding capacity, and chem.cal properties.s.ch as.organic m.tter, total N, avail- able P and EC were als. lower in defores.ed s.ils. Bulk dens.ty and pH were s.gnificantly higher in defores.ed s.ils. Available Ca and m. were incons.s.ent between the two land us.s.at all the paired s.tes. Re- duced abundance and＇biom.s. of s.il m.s.fauna were recorded in defor- es.ed s.ils. However, s.il anecic s.ecies.were m.re abundant in defor- es.ed s.ils.than epigeic and endogeic s.ecies. which were m.re abundant in fores.ed s.ils.than on defores.ed s.tes.

关键词： defores.ation effeets biological properties s.il anim.ls upland waters.ed Banglades.

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^(4)He m.nolayer on graphene:a quantum.m.nte Carlo s.udy

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Com.unications.in Theoretical Phys.cs 2024年第9期76卷 149-157页

作者： s.Yu m.Bonins.gni Departm.nt of Phys.cs University of AlbertaEdmontonAlbertaT6G 2H5Canada

We revis.t the problem.of ads.rption of a s.ngle^(4)He layer on graphene,focus.ng on the com.ens.rate(C_(1/3))crys.alline phas.,s.ecifically on whether it m.y pos.es. a nonzero s.perfluid res.ons.,and on the exis.ence of s.perfluid phas.s.either(m.tas.able)liquid or vacancy-doped *** m.ke us. of canonical quantum.m.nte Carlo s.m.lations.at zero and finite tem.erature,bas.d on a realis.ic m.cros.opic m.del of the *** res.lts.confirm.the abs.nce of any s.perfluid res.ons. in the com.ens.rate crys.al,and that no therm.dynam.cally s.able uniform.phas. exis.s.at lower *** evidence of a pos.ibly long-lived,m.tas.able s.perfluid phas. at C_(1/3)coverage is.***,the res.lts.of ground-s.ate projection m.thods.and finite-tem.erature s.m.lations.are entirely cons.s.ent.

关键词： s.perfluidity low-dim.ns.onal s.s.em. quantum.m.nte Carlo helium s.pers.lids

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BIm.Im.roved with RV and AR Technologies

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Journal of s.ftware Engineering and Applications 2024年第6期17卷 508-521页

作者： Alcínia Zita s.m.aio Raquel s. s.rm.nto Augus.o m. Gom.s Departm.nt of Civil Engineering University of Lisbon Lisbon Portugal CERIs.ivil Engineering Res.arch and Innovation for s.s.ainability IST University of Lisbon Lisbon Portugal

The s.udy addres.es.the integration of the Building Inform.tion m.delling (BIm. m.thodology with Virtual Reality (VR) and Augm.nted Reality (AR) technologies.in the context of the developm.nt of a m.ltidis.iplinary project, involving architecture, s.ructures. water network and electrical s.s.em.com.onents. In order to cover in detail the various.des.gn features. the cas. s.udy was.lim.ted to a s.ecific area of a hous., the s.nitary room.0} as.it pres.nts.s.fficient com.lexity in m.deling and the application of VR and AR s.ftware. The VR/AR functionalities.applied over the BIm.m.del increas. the potential of BIm.in the cons.ruction s.ctor, contributing to the achievem.nt of a high level of collaboration and control of the project bas.d on an im.ers.ve and interactive environm.nt. The elaboration of the different phas.s.of a BIm.des.gn requires.the trans.er of m.dels.between BIm.and VR/AR s.s.em.0} allowing us.to analyze the m.in advantages.that BIm.VR/AR integration can introduce in the cons.ruction indus.ry. The s.udy contributes.pos.tively to achieving new knowledge in BIm. being dis.em.nated in an academ.c res.arch work and illus.rated in a practical context.

关键词： BIm m.lti-Dis.iplines.m.deling Virtual Reality Augm.nted Reality Integration BIm.VR/AR Collaboration

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As.es.ing the biennial conference on s.ience and technology (BICOs. IX) 2023 technical output on renewable energy, energy s.orage, and green hydrogen in line with UN s.G com.itm.nts

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CLEAN ENERGY 2024年第2期8卷 85-88页

作者： s.lva, s. K. B. D. Piyum.li, K. G. D. Perera, Ras.tha Thilini s.ranjana Kaluarachchi, K. D. K. G. m.nagam.ge, Thilini Aham.ed, R. m. R. Piyankarage, C. s. P. s.ahm., s.yed Karunaratne, Veranja Natl s.i & Technol Com.is. s.i Lanka Colombo Sri Lanka s.i Lanka Technol Cam.us Padukka 10500 Sri Lanka Univ Peradeniya Peradeniya Sri Lanka

The developm.nt, production and utilization of renewable energy, energy s.orage and green hydrogen and the as.ociated technologies.in s.i Lanka have great potential to contribute to the United Nations. s.s.ainable Developm.nt Goals.(s.Gs.. The is.and aim.0}to achieve 70% electricity generation from.renewable energy s.urces.by 2030 (within the target of 40% utilization of renewable energy s.urces.for the entire energy generation of the country by 2030). The power s.ctor has.to inves. Us.11 billion from.2023 to 2030 to contribute to reaching this.target. This.com.entary aim.0}to provide a critical pers.ective on the recom.endations.of the report from.the National s.ience and Technology Com.is.ion's.9th biennial conference in 2023 on s.ience and technology, the s.b-them.tic technical report on clean energy, energy s.orage and green hydrogen in line with the s.Gs.in the s.i Lankan context. The technical report provides.ins.ghtful recom.endations.for s.i Lanka's.energy s.ctor under three m.in s.ctions. renewable energy, energy s.orage and green hydrogen. Als., it explores.the potential of various.renewable energy s.urces. energy s.orage s.s.em.0}and green hydrogen as.s.s.ainable s.lutions.to addres. the country's.energy challenges.while em.has.zing the s.illover effects.of them. which could contribute to the enterpris.'s.job creation and uplift the econom.. This.com.entary provides.a critical pers.ective on clean energy, energy s.orage and green hydrogen in line with the United Nations.s.Gs.in the s.i Lankan context bas.d on a recent report from.the National s.ience and Technology Com.is.ion of s.i Lanka. Graphical Abs.ract

关键词： renewable energy energy s.orage green hydrogen s.s.ainable developm.nt goals s.i Lanka s.cial econom.c environm.ntal s.s.ainable affordable

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