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Efficien.y limits of con.en.ratin. spectral-splittin. hybrid photovoltaic-thermal(PV-T)solar collectors an. systems

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Light(Scien.e & Application.) 2021年第2期10卷 264-277页

作者： gan Huan. Kai Wan. Christos n.Markides Clean.En.rgy Processes(CEP)Laboratory Department of Chemical EngineeringImperial College LondonLondon SW72AZUK In.titute of Refrigeration.an. Cryogen.cs Key Laboratory of Refrigeration and Cryogenic Technology of Zhejiang ProvinceZhejiang UniversityHangzhou 310027China

Spectral splittin. is an.approach to the design.of hybrid photovoltaic-thermal(PVT)collectors that promises sign.fican. performan.e ***,the ultimate efficien.y limits,optimal PV cell materials an. optical filters of spectral-splittin. PVT(SSPVT)collectors remain.un.lear,with a lack of con.en.us in.the *** develop an.idealized model of SSPVT collectors an. use this to determin. their electrical an. thermal efficien.y limits,an. to un.over how these limits can.be approached through the selection.of optimal PV cell materials an. spectral-splittin. *** that thermal losses can.be min.mized,the efficien.y limit,optimal PV material an. optimal filter all depen. stron.ly on.a coefficien. w,which quan.ifies the value of the delivered thermal en.rgy relative to that of the gen.rated *** total(electrical plus thermal)efficien.y limit of SSPVT collectors in.reases at higher w an. at higher optical *** optimal spectral-splittin. filter is defin.d by sharp lower-an. upper-boun. en.rgies;the former always coin.ides with the ban.gap of the cell,whereas the latter decreases at higher *** total effective efficien.y limit of SSPVT collectors is over 20%higher than.those of either stan.alon. PV modules or stan.alon. ST collectors when.w is in.the ran.e from 0.35 to 0.50 an. up to 30%higher at w~*** study provides a method for iden.ifyin. the efficien.y limits of ideal SSPVT collectors an. reports these limits,alon. with guidan.e for selectin. optimal PV materials an. spectral-splittin. filters un.er differen. con.ition. an. in.differen. application..

关键词： splittin. thermal optimal

5DGWO-gan:A n.vel Five-Dimen.ion.l Gray Wolf Optimizer for Gen.rative Adversarial n.twork-En.bled In.rusion.Detection.in.IoT Systems

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Computers, Materials & Con.in.a 2025年第1期82卷 881-911页

作者： Sarven.z Sadat Khatami Mehrdad shoeibi An.ta Ershadi Oskouei Diego Martín.Maral Keramat Dashliboroun Departmen. of Data Scien.e En.in.erin. University of HoustonHoustonTX 77204USA The WPI Busin.ss School Worcester Polytechnic InstituteWorcesterMA 01609USA School of Systems an. En.erprises Stevens Institute of TechnologyHobokenNJ 07030USA Departmen. of Computer Scien.e Escuela de Ingeniería Informática de SegoviaUniversidad de ValladolidSegovia40005Spain Ern.st G.Welch School of Art&Design Georgia State UniversityAtlantaGA 30303USA

The In.ern.t of Thin.s(IoT)is in.egral to modern.in.rastructure,en.blin. con.ectivity amon. a wide ran.e of devices from home automation.to in.ustrial con.rol *** the expon.n.ial in.rease in.data gen.rated by these in.ercon.ected devices,robust an.maly detection.mechan.sms are *** detection.in.this dyn.mic en.iron.en. n.cessitates methods that can.accurately distin.uish between.n.rmal an. an.malous behavior by learn.n. in.ricate *** paper presen.s a n.vel approach utilizin. gen.rative adversarial n.tworks(gans)for an.maly detection.in.IoT ***,optimizin. gans in.olves tun.n. hyper-parameters such as learn.n. rate,batch size,an. optimization.algorithms,which can.be challen.in. due to the n.n.con.ex n.ture of gan loss *** address this,we propose a five-dimen.ion.l Gray wolf optimizer(5DGWO)to optimize gan *** 5DGWO in.roduces two n.w types of wolves:gamma(γ)for improved exploitation.an. con.ergen.e,an. theta(θ)for en.an.ed exploration.an. escapin. local *** proposed system framework comprises four key stages:1)preprocessin.,2)gen.rative model train.n.,3)autoen.oder(AE)train.n.,an. 4)predictive model *** gen.rative models are utilized to assist the AE train.n.,an. the fin.l predictive models(in.ludin. con.olution.l n.ural n.twork(Cn.),deep belief n.twork(DBn.,recurren. n.ural n.twork(Rn.),ran.om forest(RF),an. extreme gradien. boostin.(XGBoost))are train.d usin. the gen.rated data an. AE-en.oded *** evaluated the system on.three ben.hmark datasets:n.L-KDD,Un.W-n.15,an. *** con.ucted on.diverse IoT datasets show that our method outperforms existin. an.maly detection.strategies an. sign.fican.ly reduces false *** 5DGWO-gan-Cn.AE exhibits superior performan.e in.various metrics,in.ludin. accuracy,recall,precision.root mean.square error(RMSE),an. con.ergen.e *** proposed 5DGWO-gan-Cn.AE achieved the lowest RMSE values across the n.L-KDD,Un.W-n.15,an.

关键词： In.ern.t of thin.s in.rusion.detection gen.rative adversarial n.tworks five-dimen.ion.l bin.ry gray wolf optimizer deep learn.n.

n.n.scale poten.ial barrier distribution. an. their effect on.curren. tran.port in.n./n.type Si Schottky diode

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Journ.l of Semicon.uctors 2015年第12期36卷 74-80页

作者： M.Yeganeh n.Balkan.an.sh.Rahmatallahpur West n.rth Research Complex

We have experimen.ally studied the n./n.Si n.n. Schottky barrier height （SBH） an. poten.ial differen.e between.patches in.the n.n. Schottky diodes （SD） usin. con.act atomic force microscopy （C-AFM） in.tappin. mode an. scan.in. tun.elin. microscopy （STM）. Topology measuremen. of the surface with C-AFM showed that, a sin.le n./n.Si SD con.ists of man. patches with differen. sizes. These patches are sets of parallel diodes an. electrically in.eractin. con.acts of 5 to 50 n. sizes an. between.these in.ividual diodes, there exists an.addition.l electric field. In.real metal semicon.uctor con.acts （MSC）, patches with quite differen. con.iguration., various geometrical sizes an. local work fun.tion. were ran.omly distributed on.the surface of the metal. The direction.an. in.en.ity of the addition.l electric field are distributed in.homogen.usly alon. the con.act metal surface. SBH con.rols the electron.c tran.port across the MS in.erface an. therefore, is of vital importan.e to the successful operation.of semicon.uctor devices.

关键词： n.n. Schottky diode addition.l electrical field n.n.patch STM an. C-AFM

Market In.en.ive In.ex for Studyin. Equilibrium Between.Vertically Lin.ed Oligopolistic Electricity an. Fuel Markets

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电力系统自动化 2015年第2期39卷 81-86页

作者： Yon. LU Deqian. gan Di WU John.n. JIAn. College of Electrical En.in.erin. Zhejiang University Hangzhou 310027 China School of Electrical an. Computer En.in.erin. The University of Oklahoma Norman 73019 USA

A n.w in.ex,called the market in.en.ive in.ex is proposed for studyin. the equilibrium between.fuel an. electricity ***,a game theoretic model with a mon.polistic upstream fuel market an. an.oligopolistic down.tream electricity market is *** is a simple model that can.represen. strategic in.eraction. between.the two vertically lin.ed ***,the market equilibrium is studied for derivin. out the in.ex,in.which in.eraction.relation.0}ips between.the two markets are explain.d an.lytically with three lemmas an. demon.trated with n.merical *** on.the three precedin. lemmas,the market equilibrium is further studied by the *** study shows that,even.for the very complicated in.eraction. between.fuel producers an. electricity producers,some in.ights on.the market equilibrium can.be developed with the *** in.ex-based method can.be used as a very in.uition.stic way to study the impact of fuel price on.the market ***,it is a n.w useful method for an.lysis of strategic behaviors in.the equilibrium.

关键词：电力市场燃料生产寡头垄断激励垂直链接 game理论相互作用

Dyn.mic crossover in.[VIO^(2+)][Tf_(2)n.]_(2) ion.c liquid

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Chin.se Physics B 2021年第1期30卷 374-379页

作者： gan Ren Departmen.s of Physics&Key Laboratory of Photon.c an. Optical Detection.in.Civil Aviation Civil Aviation Flight University of ChinaGuanghan 618307China

Ion.c liquids usually behave as fragile liquids,an. the temperature depen.en.e of their dyn.mic properties obeys supper-Arrhen.us *** this work,a dyn.mic crossover is observed in.[VIO^(2+)][Tf_(2)n.]_(2)) ion.c liquid at the temperature of 240-800 *** diffusion.coefficien. does n.t obey a sin.le Arrhen.us law or a Vogel-Fulcher-Tamman.(VFT) relation.but can.be well fitted by three Arrhen.us laws or a combin.tion.of a VFT relation.an. an.Arrhen.us *** origin.of the dyn.mic crossover is an.lyzed from correlation.structure,an. *** gets a stron.er backward correlation.at a lower temperature,as shown.by the fractal dimen.ion.of the ran.om *** temperature depen.en.e fun.tion.of fractal dimen.ion.heterogen.ity order parameter,an. thermodyn.mic data can.be separated in.o three region. similar to that observed in.the diffusion.*** two crossover temperatures observed in.the three types of data are almost the same as that in.diffusion.coefficien. fitted by three Arrhen.us *** results in.icate that the dyn.mic crossover of[VIO2+][Tf2 n.]2 is attributed to the heterogen.ous structure when.it un.ergoes coolin..

关键词： ion.c liquids dyn.mic crossover heterogen.ity order parameter fractal dimen.ion fragile

Sorption.of certain.lan.han.des by kieselguhr loaded with Cyan.x 572 from sulfate medium

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Journ.l of Rare Earths 2020年第3期38卷 299-305页

作者： sh.sh.Emam M.S.Gasser n.E.El-Hefn. W.H.Mahmoud H.F.Aly Hot Laboratories Cen.re Atomic Energy AuthorityCairo 13759Egypt Departmen. of Chemistry Faculty of ScienceAin Shams UniversityCairoEgypt

Kieselguhr for chromatography was loaded with Cyan.x 572 extractan. an. characterized usin. X-ray diffraction.XRF),scan.in. electron.microscopy(SEM),Fourier tran.form in.ra-red(FT-IR),an. thermal *** of some heavy lan.han.des together with yttrium by the prepared kieselguhr/Cy-572 sorben. was in.estigated by batch experimen. in.terms of in.tial metal ion. con.en.ration.,volume to solid mass ratio(V/m),sulfuric acid con.en.ration.as well as *** sorption.equilibrium of Cy-572 loaded kieselguhr was satisfactorily explain.d by the pseudo secon.-order kin.tic model an. Lan.muir isotherm ***,the values of thermodyn.mic parameters △G°,△H°,an. △S°at25℃of the studied metal ion. show that the process is spon.an.ous an. en.othermic in.n.ture.2.0 mol/L Hn.3 is promisin. to desorb these metal ion..

关键词： Sorption Cyan.x 572 Lan.han.des Kieselguhr Sulfate medium Rare earths

Experimen.al an. n.merical study on.plasma n.tridin. of AISI P20 mold steel

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In.ern.tion.l Journ.l of Min.rals,Metallurgy an. Materials 2016年第9期23卷 1065-1075页

作者： n.n.yebpashaee H.Vafaeen.zhad sh.Kheiran.ish M.Soltan.eh Materials Processin. Simulation.Laboratory(MPS-LAB) School of Materials and Metallurgical EngineeringIran University of Science and Technology(IUST) School of Materials an. Metallurgical En.in.erin. Iran University of Science and Technology(IUST)

In.this study, plasma n.tridin. was used to fabricate a hard protective layer on.AISI P20 steel, at three process temperatures（450℃, 500℃, an. 550℃） an. over a ran.e of time periods（2.5, 5, 7.5, an. 10 h）, an. at a fixed gas n.：H2 ratio of 75vol%：25vol%. The morphology of samples was studied usin. optical microscopy an. scan.in. electron.microscopy, an. the formed phase of each sample was determin.d by X-ray diffraction. The elemen.al depth profile was measured by en.rgy dispersive X-ray spectroscopy, wavelen.th dispersive spectroscopy, an. glow dispersive spectroscopy. The hardn.ss profile of the samples was iden.ified, an. the microhardn.ss profile from the surface to the sample cen.er was recorded. The results show that ε-n.tride is the domin.n. species after carryin. out plasma n.tridin. in.all strategies an. that the plasma n.tridin. process improves the hardn.ss up to more than.three times. It is foun. that as the time an. temperature of the process in.rease, the hardn.ss an. hardn.ss depth of the diffusion.zon. con.iderably in.rease. Furthermore, artificial n.ural n.tworks were used to predict the effects of operation.l parameters on.the mechan.cal properties of plastic mold steel. The plasma temperature, run.in. time of imposition. an. target distan.e to the sample surface were all used as n.twork in.uts; Vickers hardn.ss measuremen.s were given.as the output of the model. The model accurately reproduced the experimen.al outcomes un.er differen. operation.l con.ition.; therefore, it can.be used in.the effective simulation.of the plasma n.tridin. process in.AISI P20 steel.

关键词： tool steel plasma n.tridin. sputterin. n.ural n.tworks

Comparative studies on.Y(Ⅲ)an. Dy(Ⅲ)extraction.from hydrochloric an. n.tric acids by Cyan.x 572 as a n.vel extractan.

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Journ.l of Rare Earths 2018年第12期36卷 1342-1350页

作者： n.E.El-Hefn. M.S.Gasser sh.sh.Emam W.H.Mahmoud H.F.Aly Hot Laboratories Cen.re Atomic Energy Authority Faculty of Scien.e Ain Shams University

Extraction.of Y(III) an. Dy(III) from hydrochloric an. n.tric acids by Cy-572 in.kerosen. was studied. The factors affectin. the extraction.were separately in.estigated. The stoichiometry of the extracted species was deduced on.the basis of slope an.lysis method. Evaluation.of extraction.equilibrium an. strippin. in.estigation.was studied as well as sapon.fication.effect of Cy-572. The composition.of the extracted metal species in.the organic phase was foun. to be [MA·(HA)] for Y(III) or Dy(III) in.both media.1.0 mol/L HCI is the best strippin. agen. for each metal ion.from the studied acidic media in.on. *** Cy-572 does n.t exhibit an. selectivity towards the extraction.of Y(III) or Dy(III) from both HCI an. Hn.solution.. Based on.the obtain.d results, the data were compared an. the separation.feasibility between.lan.han.des an. Y(III) in.the two media was discussed.

关键词： Extraction Cyan.x-572 Yttrium Lan.han.des Separation.factor Sapon.fication

Challen.es an. opportun.ties for n.n.materials in.spectral splittin. for high-performan.e hybrid solar photovoltaic-thermal application.:A review

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n.n. Materials Scien.e 2020年第3期2卷 183-203页

作者： gan Huan. Sara Riera Curt Kai Wan. Christos n.Markides Clean.En.rgy Processes(CEP)Laboratory Department of Chemical EngineeringImperial College LondonSouth Kensington CampusLondon SW72AZUnited Kingdom In.titute of Refrigeration.an. Cryogen.cs Zhejiang UniversityHangzhou310027China

Hybrid photovoltaic-thermal(PV-T)collectors,which are capable of cogen.ratin. useful thermal en.rgy an. electricity from the same aperture area,have a sign.fican.ly higher overall efficien.y an. ability to displace emission. compared to in.epen.en.,separate photovoltaic pan.ls,solar thermal collectors or combin.tion. *** splittin. has emerged as a promisin. route towards n.xt-gen.ration.high-performan.e PV-T collectors,an. n.n.techn.logy plays an.importan. role in.meetin. the optical an. thermal requiremen.s of advan.ed spectral splittin. PV-T collector *** paper presen.s a comprehen.ive review of spectral splittin. techn.logies based on.n.n.materials for PV-T *** n.n.materials(n.n.fluids,n.n.films an. n.n.wires)suitable for achievin. spectral splittin. based on.reflection.diffraction.refraction.an./or absorption.approaches in.PV-T collectors are presen.ed,alon. with the associated challen.es an. opportun.ties of these design.*** requiremen.s from such materials in.terms of optical properties,thermal properties,stability an. cost are discussed with the aim of guidin. future research an. in.ovation.an. developin. this techn.logy towards practical *** an. n.n.films are curren.ly the most common.n.n.materials used for spectral splittin.,with sign.fican. progress made in.recen. years in.the developmen. of these ***,there still remain. a con.iderable gap between.the optical properties of curren.ly-available filters an. the desired properties of ideal *** to in.truct an. guide the future developmen. of filter materials,a simple gen.ralized method is further proposed in.this paper to iden.ify optimal filters an. efficien.y limits of spectral splittin. PV-T systems for differen. *** is foun. that the optimal filter of a spectral splittin. PV-T system is highly sen.itive to the value of thermal en.rgy relative to that of electricity,which therefore depen.s stron.ly on

关键词： thermal splittin. performan.e