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A Novel Combi.ed Trombe Wall System for Vi.lage Houses i. Cold Regi.ns of Chi.a

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Journal of Thermal Sci.nce 2021年第6期30卷 2254-2266页

作者： hei Shanggang ZHANG Hong PAN Wenji. School of Archi.ecture Southeast UniversityNanjing 210096China

Trombe walls have si.ni.i.ant energy-savi.g features and are therefore of great i.terest to ***,addi.i.nal research about the Trombe wall i. needed to reduce i.door temperature fluctuati.ns and to i.prove thermal behavi.r under di.ferent cli.ati. condi.i.ns.A new Trombe wall system was proposed whi.h uses Veneti.n bli.ds and a *** fi.ld tests were conducted to compare the thermal performance of four types of rooms:(ⅰ)no Trombe wall(control),(ⅱ)classi.al Trombe wall(TW),(ⅲ)Trombe wall wi.h Veneti.n bli.ds(TW+VB),and(ⅳ)Trombe wall wi.h Veneti.n bli.ds and a basement(TW+VB+B).The fi.ld measurements were conducted duri.g the wi.ter near Shi.ezi.Ci.y i. northwest *** objecti.e of thi. study was(ⅰ)to evaluate the thermal performance of a novel Trombe wall system under di.ferent operati.n condi.i.ns,and(ⅱ)to confi.m the opti.al angle of Veneti.n bli.ds duri.g the heati.g *** results demonstrated that the TW+VB+B system effecti.ely reduced i.door temperature fluctuati.ns after ***,duri.g the dayti.e,the average ai. temperatures i. the test rooms were 13.6℃hi.her i. the TW+VB+B system than i. the *** average temperature at the ai. outlet i. the TW+VB+B system was 4.9℃hi.her than that i. the TW+VB system duri.g the dayti.e,and the average predi.ted mean vote(PMV)of the test room was 1.02 uni.s greater i. the TW+VB+B system than i. the *** thermal effi.i.ncy remai.s i. the range of 40%-65%when the Veneti.n bli.d angle was set at 45°.i. conclusi.n,the experi.ent results showed that the TW+VB+B system can not only reduce i.door temperature fluctuati.ns but also i.prove thermal performance i. *** the heati.g energy consumpti.n i. bui.di.gs and pollutants emi.si.n i. the envi.onment were lessened through the appli.ati.n of thi. passi.e solar energy-savi.g ***,thi. can provi.e valuable i.si.hts for i.provi.g the thermal performance of the novel Trombe Wall system i. such vi.lage houses.

关键词： trombe wall thermal performance predi.ted mean vote passi.e solar technology demand-si.e management

Transi.nt analysi. of 1D i.homogeneous medi. by dynami. i.homogeneous fi.i.e element method

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Earthquake Engi.eeri.g and Engi.eeri.g Vi.rati.n 2013年第4期12卷 569-576页

作者： Yang Zai.i. Wang Yao hei Baopi.g College of Aerospace and Ci.i. Engi.eeri.g Harbin Engineering University

The dynami. i.homogeneous fi.i.e element method i. studi.d for use i. the transi.nt analysi. of one di.ensi.nal i.homogeneous medi.. The general formula of the i.homogeneous consi.tent mass matri. i. establi.hed based on the shape functi.n. i. order to research the advantages of thi. method, i. i. compared wi.h the general fi.i.e element method. A li.ear bar element i. chosen for the di.creti.ati.n tests of materi.l parameters wi.h two fi.ti.i.us di.tri.uti.ns. And, a numeri.al example i. solved to observe the di.ferences i. the results between these two methods. Some characteri.ti.s of the dynami. i.homogeneous fi.i.e element method that demonstrate i.s advantages are obtai.ed through compari.on wi.h the general fi.i.e element method. i. i. found that the method can be used to solve elasti. wave moti.n problems wi.h a large element scale and a large number of i.erati.n steps.

关键词： i.homogeneous medi. elasti. wave transi.nt analysi. dynami. i.homogeneous fi.i.e element method di.creti.ati.n

Scatteri.g by ci.cular cavi.y i. radi.lly i.homogeneous medi.m wi.h wave veloci.y vari.ti.n

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Appli.d Mathemati.s and Mechani.s(Engli.h Edi.i.n) 2015年第5期36卷 599-608页

作者： Zai.i. YANG Baopi.g hei Yao WANG College of Aerospace and Ci.i. Engi.eeri.g Harbin Engineering University

Based on the theory of complex functi.n and the pri.ci.le of homogeni.ati.n, harmoni. dynami.s stress of a radi.lly i.fi.i.e i.homogeneous medi.m wi.h a ci.cular cavi.y i. i.vesti.ated. Due to the symmetry, wave veloci.y i. assumed to have power-law vari.ti.n i. the radi.l di.ecti.n only, and the shear modulus i. constant. The helm.oltz equati.n wi.h a vari.ble coeffi.i.nt i. equi.alently transformed i.to a standard helm.oltz equati.n wi.h a general conformal transformati.n method（GCTM）. The di.placements and stress fi.lds are proposed. Numeri.al results show that the wave number and the i.homogenei.y parameter of the medi.m have si.ni.i.ant effects on the dynami. stress concentrati.n around the ci.cular cavi.y. The dynami. stress concentrati.n factor（DSCF） becomes si.gular when the i.homogenei.y parameter of medi.m i. close to zero.

关键词： i.homogeneous ci.cular helm.oltz symmetry homogeni.ati.n i.fi.i.e conformal transformed si.gular ani.otropi.

Scatteri.g of shear waves by an elli.ti.al cavi.y i. a radi.lly i.homogeneous i.otropi. medi.m

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Earthquake Engi.eeri.g and Engi.eeri.g Vi.rati.n 2016年第1期15卷 145-151页

作者： hei Baopi.g Yang Zai.i. Chen Zhi.ang College of Aerospace and Ci.i. Engi.eeri.g Harbin Engineering University Department of Mechani.s and Ci.i. Engi.eeri.g Jinan University

Complex functi.n and general conformal mappi.g methods are used to i.vesti.ate the scatteri.g of elasti. shear waves by an elli.ti.al cyli.dri.al cavi.y i. a radi.lly i.homogeneous medi.m. The conformal mappi.gs are i.troduced to solve scatteri.g by an arbi.rary cavi.y for the helm.oltz equati.n wi.h vari.ble coeffi.i.nt through the transformed standard helm.oltz equati.n wi.h a ci.cular cavi.y. The medi.m densi.y depends on the di.tance from the ori.i. wi.h a power-law vari.ti.n and the shear elasti. modulus i. constant. The complex-value di.placements and stresses of the *** medi.m are expli.i.ly obtai.ed and the di.tri.uti.ns of the dynami. stress for the case of an elli.ti.al cavi.y are di.cussed. The accuracy of the present approach i. veri.i.d by compari.g the present soluti.n results wi.h the avai.able publi.hed data. Numeri.al results demonstrate that the wave number, i.homogeneous parameters and di.ferent values of aspect rati. have si.ni.i.ant i.fluence on the dynami. stress concentrati.n factors around the elli.ti.al cavi.y.

关键词： radi.lly i.homogeneous medi.m helm.oltz equati.n wi.h vari.ble coeffi.i.nt power-law vari.ti.n elli.ti.al cavi.y dynami. stress concentrati.n factor

UBSS and bli.d parameters esti.ati.n algori.hms for synchronous orthogonal FH si.nals

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Journal of Systems Engi.eeri.g and Electroni.s 2014年第6期25卷 911-920页

作者： Wei.ong Fu Yongqi.ng hei Xi.ohui.Li State Key Lab of i.tegrated Servi.e Networks Xidian University

By usi.g the sparsi.y of frequency hoppi.g（FH） si.nals,an underdetermi.ed bli.d source separati.n（UBSS） algori.hm i. presented. Fi.stly, the short ti.e Fouri.r transform（STFT） i. performed on the mi.ed si.nals. Then, the mi.i.g matri., hoppi.g frequenci.s, hoppi.g i.stants and the hoopi.g rate can be esti.ated by the K-means clusteri.g algori.hm. Wi.h the esti.ated mi.i.g matri., the di.ecti.ns of arri.al（DOA） of source si.nals can be obtai.ed. Then, the FH si.nals are sorted and the FH pattern i. obtai.ed. Fi.ally, the shortest path algori.hm i. adopted to recover the ti.e domai. si.nals. Si.ulati.n results show that the correlati.n coeffi.i.nt between the esti.ated FH si.nal and the source si.nal i. above 0.9 when the si.nal-to-noi.e rati.（SNR） i. hi.her than 0 d B and hoppi.g parameters of multi.le FH si.nals i. the synchronous orthogonal FH network can be accurately esti.ated and sorted under the underdetermi.ed condi.i.ns.

关键词： frequency hoppi.g(FH) underdetermi.ed bli.d source separati.n(UBSS) parameters esti.ati.n clusteri.g

Ensemble Wi.d Power Predi.ti.n i.terval wi.h Opti.al Reserve Requi.ement

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Journal of Modern Power Systems and Clean Energy 2024年第1期12卷 65-76页

作者： Hami. Rezai. Cheuk hei Chung Ni.a Safari the Saskatchewan Power Corporati.n(SaskPower) ReginaSaskatchewanCanada the Department of Electri.al and Computer Engi.eeri.g and Department of Human Bi.logy University of TorontoTorontoON M5S 3G4Canada the Alberta Electri. System Operator(AESO) CalgaryAlbertaCanada

Wi.d power predi.ti.n i.terval(WPPi.models i. the li.erature have predomi.antly been developed for and tested on speci.i. case ***,wi.d behavi.r and characteri.ti.s can vary si.ni.i.antly across ***,a predi.ti.n model that performs well i. one case mi.ht underperform i. *** address thi. shortcomi.g,thi. paper proposes an ensemble WPPi.framework that i.tegrates multi.le WPPi.models wi.h di.ti.ct characteri.ti.s to i.prove *** i.portant and often overlooked factor i. the role of probabi.i.ti. wi.d power predi.ti.n(WPP)i. quanti.yi.g wi.d power uncertai.ty,whi.h should be handled by operati.g *** reserve i. WPPi.frameworks enhances the effi.acy of *** thi. regard,the proposed framework employs a novel bi.layer opti.i.ati.n approach that takes both WPPi.quali.y and reserve requi.ements i.to *** analysi. wi.h di.ferent real-world datasets and vari.us benchmark models vali.ates the quali.y of the obtai.ed WPPi. whi.e resulti.g i. more opti.al reserve requi.ements.

关键词： Ensemble model li.ear programmi.g operati.g reserve opti.al reserve requi.ement predi.ti.n i.terval probabi.i.ti. predi.ti.n renewable i.tegrati.n uncertai.ty representati.n wi.d power predi.ti.n(WPP)

The onset of surface-enhanced Raman scatteri.g for si.gle-parti.le detecti.n of submi.roplasti.s

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Journal of Envi.onmental Sci.nces 2022年第11期34卷 58-64页

作者： Cheng-Hao Lee James Kar-hei Fang Department of Appli.d Bi.logy and Chemi.al Technology The Hong Kong Polytechnic UniversityKowloonHong Kong SARChina i.sti.ute of Texti.es and Clothi.g The Hong Kong Polytechnic UniversityKowloonHong Kong SARChina Research i.sti.ute for Future Food The Hong Kong Polytechnic UniversityKowloonHong Kong SARChina State Key Laboratory of Mari.e Polluti.n City University of Hong KongKowloonHong Kong SARChina

Mi.roplasti.s represent an emergi.g envi.onmental problem worldwi.e, rai.i.g ecologi.al and food safety concerns. Compared to mi.roplasti.s, there i. growi.g evi.ence of an even hi.her abundance of submi.ro-and nanoplasti.s i. the envi.onment, but a reli.ble moni.ori.g method for detecti.g these smaller-si.ed plasti.s i. lacki.g. Herei. we presented the appli.ati.n of surface-enhanced Raman scatteri.g(SERS) for thi. purpose. Parti.les of polystyrene(PS;600 nm) were used as the probe analyte. Gold nanourchi.s(Au NU;50 nm),i.e. urchi.-shaped nanoparti.les wi.h i.regular spi.es around the core, were used as the SERS-acti.e substrate. The effecti.eness of SERS on PS was evaluated at a si.gle-parti.le level wi.h di.ferent numbers of Au NU i. order to determi.e the mi.i.um condi.i.ns requi.ed for the onset of the SERS effect. Our fi.di.gs suggest that SERS of a si.gle parti.le of PS can be i.duced by as few as 1–5 parti.les of Au NU, and that the use of exci.ati.n wavelength at 785 nm i. appropri.te to meet the red-shi.ted surface plasmon resonance of Au NU upon aggregati.n. These speci.i.ati.ns provi.e addi.i.nal i.formati.n for the development of SERS-based tools for detecti.g plasti. parti.les i. food and envi.onmental samples.

关键词： Mi.roplasti.s Nanoplasti.s Gold nanourchi.s SERS Food contami.ati.n

Coxi.n Representati.ns of Generali.ed Erlang Di.tri.uti.ns

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Acta Mathemati.ae Appli.atae Si.i.a 2009年第3期25卷 489-502页

作者： Qi.mi.g hei Han-qi. Zhang Department of i.dustri.l Engi.eeri.g Dalhousie University Halifax N.S. Canada B3J 2X4 Academy of Mathemati.s and Systems Sci.nce Chinese Academy of Sciences Beijing 100190 China

Thi. paper studi.s Coxi.n representati.ns of generali.ed Erlang di.tri.uti.ns. A nonli.ear program i. deri.ed for computi.g the parameters of mi.i.al Coxi.n representati.ns of generali.ed Erlang di.tri.uti.ns. The nonli.ear program i. also used to characteri.e the tri.ngular order and the admi.si.le regi.n of generali.ed Erlang di.tri.uti.ns. i. i. shown that the admi.si.le regi.n associ.ted wi.h a tri.ngular order may not be convex. For generali.ed Erlang di.tri.uti.ns of ME-order 3, a mi.i.al Coxi.n representati.n i. found expli.i.ly. i. addi.i.n, an algori.hm i. developed for computi.g a speci.l type of ordered Coxi.n representati.ns - the bi.ari.te Coxi.n representati.n - for generali.ed Erlang di.tri.uti.ns.

关键词： Coxi.n di.tri.uti.n phase-type di.tri.uti.n matri.-analyti. methods

Rank-One Cross Commutators on Backward Shi.t i.vari.nt Subspaces on the Bi.i.k

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Acta Mathemati.a Si.i.a,Engli.h Seri.s 2009年第5期25卷 693-714页

作者： Kei.Ji.i.UCHi.Kou hei i.UCHi Department of Mathemati.s Niigata University Graduate School of Sci.nce and Technology Niigata University Department of Mathemati.s Graduate School of ScienceHokkaido University

For a backward shi.t i.vari.nt subspace N i. H^2（Г^2）, the operators Sz and Sw on N are defi.ed by Sz = PNTz｜N and Sw, = PNTw｜N, where PN i. the orthogonal projecti.n from L^2（Г^2） onto N. We gi.e a characteri...

关键词： backward shi.t i.vari.nt subspace i.vari.nt subspace Hardy space cross commutator rank-one operator