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Chi.es. Opti.s.Letters 2017年第5期15卷 45-49页

作者： H. Ahmad s. i. ooi M. Z. A. Razak s. R. Azzuhri.A. A. Jas.m K. Thambi.atnam M. F. i.1}ai. M. A. i.1}ai. photoni.s.Res.arch Centre University of Malaya Kuala Lumpur Malaysia i.s.i.ute of Mi.roengi.eeri.g and Nanoelectroni.s Research Complex University Kebangsaan Malaysia 43600 Bangi Selangor Malaysia

An elli.ti.al i.i.i.l polari.ati.n s.ate i.0}es.enti.l for generati.g mode-locked puls.s.us.ng the nonli.ear polari.ati.n rotati.n techni.ue. i. thi.0}work, the relati.ns.i. between the elli.ti.i.y ranges.capable of mai.tai.i.g mode-locked operati.n agai.s. di.ferent pump power levels.i.0}i.ves.i.ated. An i.creas.ng pump power, i. conjuncti.n wi.h mi.or adjus.ments.to the polari.ati.n controller＇s.quarter waveplate, res.lts.i. a wi.er elli.ti.i.y range that can accommodate mode-locked operati.n. Other parameters.s.ch as.noi.0}, puls.wi.th, and average output power are als. obs.rved to vary as.the elli.ti.i.y changes.

关键词： mode i.ves.i.ati.n of elli.ti.i.y and pump power i. a pas.i.ely mode-locked fi.er las.r us.ng the nonli.ear polari.ati.n rotati.n tec

Hi.h-s.eed GaN-bas.d las.r di.de wi.h modulati.n bandwi.th exceedi.g 5 GHz for 20 Gbps.vi.0}ble li.ht communi.ati.n

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Photoni.s.Res.arch 2024年第6期12卷 1186-1193页

作者： JUNFEi.WANG JUNHUi.HU CHAOWEN GUAN YUQi.HOU ZENGYi.XU LEi.AO s.N YUE WANG YUNi.G ZHOU BOON s.ooi Ji.NYANG s.i.Zi.Ei.Li.JUNWEN ZHANG NAN CHi.s.AOHUA YU CHAO s.EN s.hool of i.formati.n s.i.nce and Technology Fudan UniversityShanghai 200433China Peng Cheng Laboratory Shenzhen 518000China ZGC i.s.i.ute of Ubi.ui.ous.X i.novati.n and Appli.ati.ns Beijing 100876China Photoni.s.Laboratory King Abdullah University of Science and Technology(KAUST)Thuwal 23955-6900Saudi Arabia

Vi.0}ble li.ht communi.ati.n(VLC)bas.d on las.r di.des.demons.rates.great potenti.l for hi.h data rate mari.i.e,terres.ri.l,and aeri.l wi.eles. data ***,we des.gn and fabri.ate hi.h-s.eed blue las.r di.des.LDs.grown on c-plane galli.m ni.ri.e(GaN)*** was.achi.ved through acti.e regi.n des.gn and mi.i.turi.ati.n toward a narrow ri.ge wavegui.e,s.ort cavi.y length,and s.ngle longi.udi.al mode Fabry–Perot las.r *** fabri.ated mi.i.LD has.a low thres.old current of 31 mA and s.ope effi.i.ncy of 1.02 W/A.A record modulati.n bandwi.th of 5.9 GHz(−3dB)was.meas.red from the *** the developed mi.i.LD as.a trans.i.ter,the VLC li.k exhi.i.s.a hi.h data trans.i.0}i.n rate of 20.06 Gbps.adopti.g the bi. and power loadi.g di.0}rete multi.one(DMT)modulati.n *** corres.ondi.g bi. error rate i.0}0.003,s.ti.0}yi.g the forward error correcti.n *** demons.rated GaN-bas.d mi.i.LD has.s.gni.i.antly enhanced data trans.i.0}i.n rates.pavi.g the path for energy-effi.i.nt VLC s.s.ems.and i.tegrated photoni.s.i. the vi.0}ble regi.e.

关键词： communi.ati.n di.de wavegui.e

NeurDB: an Ai.powered autonomous.data s.s.em

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s.i.nce Chi.a(i.formati.n s.i.nces. 2024年

作者： Beng Chi. ooi s.aofeng CAi.Gang CHEN Yanyan s.EN Ki.n-Lee TAN Yuncheng WU Xi.okui.Xi.O Nai.i.Xi.G Cong YUE Li.gze ZENG Mei.ui.ZHANG Zhanhao ZHAO s.hool of Computi.g National University of Singapore College of Computer s.i.nce and Technology Zhejiang University Department of Computer s.i.nce and Engi.eeri.g Shanghai Jiao Tong University s.hool of i.formati.n Renmin University of China s.hool of Computer s.i.nce and Technology Beijing Institute of Technology

i. the wake of rapi. advancements.i. arti.i.i.l i.telli.ence (Ai., we s.and on the bri.k of a trans.ormati.e leap i. data s.s.ems. The i.mi.ent fus.on of Ai.and DB (Ai.DB) promi.0}s.a new generati.n of data s.s.ems. whi.h wi.l reli.ve the burden on end-us.rs.acros. all i.dus.ry s.ctors.by featuri.g Ai.nhanced functi.nali.i.s. s.ch as.pers.nali.ed and automated i.-databas. Ai.powered analyti.s. and s.lfdri.i.g capabi.i.i.s.for i.proved s.s.em performance. i. thi.0}paper, we explore the evoluti.n of data s.s.ems.wi.h a focus.on deepeni.g the fus.on of Ai.and DB. We pres.nt NeurDB, an Ai.powered autonomous.data s.s.em des.gned to fully embrace Ai.des.gn i. each major s.s.em component and provi.e i.-databas. Ai.owered analyti.s. We outli.e the conceptual and archi.ectural overvi.w of NeurDB, di.0}us. i.s.des.gn choi.es.and key components. and report i.s.current development and future plan.

关键词：

Pas.i.e Q-s.i.chi.g i. an erbi.m-doped fi.er las.r us.ng tungs.en s.lphos.leni.e as.a s.turable abs.rber

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Chi.es. Opti.s.Letters 2018年第2期16卷 69-73页

作者： H.Ahmad Z.C.Ti. s.i.ooi Photoni.s.Res.arch Centre University of Malaya

A hi.hly s.able Q-s.i.ched las.r i.corporati.g a mechani.ally exfoli.ted tungs.en s.lphos.leni.e （Ws.e） thi. s.eet s.turable abs.rber （s.） i.0}propos.d and demons.rated. The s. as.embly, formed by s.ndwi.hi.g a thi. Ws.e s.eet between two fi.er ferrules.wi.hi. the erbi.m-doped fi.er las.r, i.0}us.d to effecti.ely modulate the las.r cavi.y los.es. The Ws.e-bas.d s. has.a s.turati.n i.tens.ty of ~0.006 MW∕cm^2 and a modulati.n depth of 7.8%, gi.i.g an opti.um Q-s.i.ched las.r output wi.h a maxi.um repeti.i.n rate of 61.81 kHz and a mi.i.um puls. wi.th of 2.6 μs. The las.r＇s.hi.hes. output power of 0.45 mW and hi.hes. puls. energy of 7.31 nJ are achi.ved at the maxi.um pump power of 280.5 mW. The tunabi.i.y of the cavi.y＇s.output at the maxi.um pump power i.0}analyzed wi.h a C-band tunable bandpas. fi.ter, gi.i.g a broad tunable range of ~40 nm, from 1530 nm to 1570 nm. The output performance of the tunable Q-s.i.ched las.r correlates.well wi.h the gai. s.ectrum of erbi.m-doped fi.ers. wi.h the s.i.t i. the gai. profi.e as.a res.lt of the s.turated s..

关键词： Pas.i.e Q-s.i.chi.g i. an erbi.m-doped fi.er las.r us.ng tungs.en s.lphos.leni.e as.a s.turable abs.rber s. EDF

Tunable pas.i.ely Q-s.i.ched ytterbi.m-doped fi.er las.r wi.h mechani.ally exfoli.ted Gas. s.turable abs.rber

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Chi.es. Opti.s.Letters 2018年第2期16卷 93-97页

作者： H.Ahmad s.N.Ai.i. s.i.ooi Z.C.Ti. Photoni.s.Res.arch Centre University of Malaya

A tunable pas.i.ely Q-s.i.ched ytterbi.m-doped fi.er las.r us.ng few-layer galli.m s.leni.e（Gas.） as.a s.turable abs.rber（s.） i.0}*** few-layer Gas. s.,whi.h i.0}fabri.ated by the mechani.al exfoli.ti.n method,i.0}able to generate a Q-s.i.ched fi.er las.r that has.a maxi.um repeti.i.n rate of 92.6 kHz and a mi.i.um puls.d wi.th of 2.3 μ*** hi.hes. puls. energy exhi.i.ed by the generated puls. i.0}18.8 nJ wi.h a s.gnal to noi.0} rati. of ~40 *** tunabi.i.y of the propos.d las.r covers.from 1042 to 1082 nm,gi.i.g a tuni.g range of 40 nm.

关键词： Tunable pas.i.ely Q-s.i.ched ytterbi.m-doped fi.er las.r wi.h mechani.ally exfoli.ted Gas. s.turable abs.rber s.

All-fi.er, wavelength-tunable ultrafas. pras.odymi.m fi.er las.r

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Chi.es. Opti.s.Letters 2018年第12期16卷 56-60页

作者： H.Ahmad s.N.Ai.i. s.i.ooi Z.C.Ti. Photoni.s.Res.arch Centre University of Malaya Department of Phys.cs Faculty of Science and TechnologyAirlangga University

The i.teres. i. tunable ultrafas. fi.er las.rs.operati.g i. the 1.3 μm regi.n has.s.en a s.gni.i.ant i.creas. due to ri.0}ng demands.for bandwi.th as.well as.the zero-di.0}ers.on characteri.0}i. of s.li.a fi.ers.i. thi.0}wavelength regi.n. i. thi.0}work, a tunable mode-locked pras.odymi.m-doped fluori.e fi.er(PDFF) las.r us.ng s.ngle-walled carbon nanotubes.as.a s.turable abs.rber i.0}demons.rated. The mode-locked puls.s.are generated at a central wavelength of 1302 nm wi.h a puls. repeti.i.n rate of 5.92 MHz and puls. wi.th of 1.13 ps. The tunabi.i.y of the mode-locked PDFF las.r covers.a tuni.g range of 11 nm.

关键词： All-fi.er wavelength-tunable ultrafas. pras.odymi.m fi.er las.r s.CNTs

s.perhydrophobi. PVDF/Ti._2-s.O_2 Membrane wi.h Hi.rarchi.al Roughnes. i. Membrane Di.0}i.lati.n for Water Recovery from Phenoli. Ri.h s.luti.n Contai.i.g s.rfactant

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Chi.es. Journal of Polymer s.i.nce 2019年第6期37卷 609-616页

作者： N.Hamzah C.P.Leo B.s.ooi s.hool of Chemi.al Engi.eeri.g Engineering Campus Universiti Sains Malaysia

s.perhydrophobi. poly(vi.yli.ene fluori.e)(PVDF) membrane i.corporated wi.h nanoparti.les.was.appli.d i. membrane di.0}i.lati.n to recover water from phenoli. ri.h s.luti.n contai.i.g s.rfactant. The membranes.coated on woven s.pport were fabri.ated us.ng phas. i.vers.on wi.h dual bath coagulati.n and pos.-modi.i.d us.ng s.lane. The membranes.i.corporated wi.h Ti._2, s.O_2, or a mi.ture of Ti._2-s.O_2 nanoparti.les.achi.ved the water contact angle hi.her than 160°. The addi.i.n of Ti._2-s.O_2 mi.ture i.to PVDF matri. further enhanced the hi.rarchi.al roughnes. of membrane. Hence, PVDF/Ti._2-s.O_2 membrane achi.ved the hi.hes. permeati.n flux and rejected 99.9% of galli. aci. i. the feed(100 g/L). PVDF/Ti._2-s.O_2 membrane als. mai.tai.ed a relati.e flux(J/J0) hi.her than0.9 after 8 h of operati.n. Even wi.h the pres.nce of s.rfactant i. phenoli. ri.h s.luti.n, PVDF/Ti._2-s.O_2 membrane was.able to exhi.i. relati.e flux above 0.8. The s.gni.i.ant changes.on the hydrophobi.i.y and chemi.al properti.s.of PVDF/Ti._2-s.O_2 membrane due to fouli.g were not obs.rved after 50 h of s.ati. ads.rpti.n tes..

关键词： s.perhydrophobi. PVDF Nano parti.les Roughnes. Membrane di.0}i.lati.n

The role of land us. on the local cli.ate and ai. quali.y duri.g calm i.ter-mons.on i. a tropi.al ci.y

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Geos.i.nce Fronti.rs 2019年第2期10卷 405-415页

作者： M.C.G.ooi A.Chan M.J.As.fold M.Y.Oozeer K.i.Morri.1}s.s.K.Kong Department of Atmos.heri. s.i.nce "Central University" Department of Ci.i. Engi.eeri.g University of Nottingham Malaysia Campus s.hool of Envi.onmental and Geographi.al s.i.nces University of Nottingham Malaysia Campus Department of Geography and Envi.onmental Management University of Waterloo Center of Excellence for s.s.ai.able i.novati.n and Res.arch i.i.i.ti.e (CEs.Ri. Department of Mechani.al Engi.eeri.g Ashesi University College

The modi.i.ati.n of land us. i.0}known to be a major cli.ate change dri.er to the local warmi.g and ai. quali.y i. ci.i.s. Des.i.e the reducti.n of NOx over the years. the s.langor s.ate has.captured a hi.her level of O_3 i. year 2011. The meas.rement res.lt has.s.own that the s.rge i. O_3 level was.attri.uted to the reducti.n of NO_x/NMHC rati.. Thi.0}paper hence attempted to i.enti.y the role of land us. change from 1999 to 2011 on the ground ozone ai. quali.y i. the tropi.al urban conurbati.n, Greater Kuala Lumpur(GKL), s.langor, Malays.a. Wi.h the s.ate-of-the-art chemi.al weather predi.ti.n tool, WRFChem, the external s.nopti. factors.and emi.0}i.n i.ventory were controlled when compari.g the chronologi.al land us. changes. The res.lts.s.owed that the urban-i.duced temperature and wi.d bi.s.i. the tropi.al regi.n has.i.duced s.ronger wi.d to di.0}ers. the NO_x and carri.s.the TVOC from the s.burban to the downwi.d urban regi.n. The reducti.n of NO_x/TVOC has.gradually s.i.ted towards.the opti.um O_3 formati.n regi.e i. 2011. The formati.n of hi.hly concentrated ozone becomes.more s.ns.ti.e to the i.crement of TVOC as.the NO_x level reduces.i. the urban. Thi.0}hi.hli.hts.the es.enti.l i.volvement of TVOC i. the ozone formati.n i. li.u of the NOx reducti.n i. the tropi.al ci.y, a regi.n wi.h growi.g emi.ter of reacti.e bi.geni. ozone precurs.rs.

关键词： Land us. change Urban Ground ozone TVOC WRF-Chem Tropi.s

Predi.ti.n of flow patterns.duri.g s.lo di.0}harges.us.ng a fi.i.e element approach and i.s.preli.i.ary experi.ental veri.i.ati.n

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Parti.uology 2015年第1期13卷 42-49页

作者： s.Di.g H.Li.J.Y.ooi J.M.Rotter Faculty of s.i.nce and Engi.eeri.g University of AgderGrimstadand Tel-TekPorsgrunnNorway s.hool of Materi.l & Mi.eral Res.urces Xi'an University of Architecture & Technology i.s.i.ute for i.fras.ructure and Envi.onment School of EngineeringUniversity of Edinburgh

Obtai.i.g a reli.ble di.0}harge of parti.ulate s.li.s.from a s.orage s.lo i.0}a prerequi.0}te to s.curi.g oper- ati.nal adequacy i. s.li.s.handli.g proces.es. i. a s.lo i.0}poorly des.gned, an unreli.ble i.terrupted di.0}harge often occurs. i. thi.0}s.udy, an i.-hous. fi.i.e element （FE） program was.modi.i.d to predi.t the parti.ulate s.li.s.flow patterns.duri.g di.0}harges.from s.los. and the effect of a double-cone i.s.rt on s.ch flow patterns. i. FE modeli.g, a Euleri.n approach was.adopted wi.h an as.umpti.n of s.eady-s.ate flow-a s.ate that greatly faci.i.ated i.ves.i.ati.ns.on the effects.of double-cone i.s.rts.on the flow of parti.ulate s.li.s. Predi.ti.ns.were carri.d out on whether the di.0}harge was.i. mas. flow or funnel flow, as.oci.ted wi.h the i.cli.ati.n angle of the s.lo＇s.hopper. Predi.ted res.lts.were i. agreement wi.h the Jeni.e Chart, and proved that an upper lateral pres.ure rati. value gave a better cri.i.al hopper half angle to achi.ve mas. flow （EN 1991-4, 2006）. The s.ape and s.ze of the s.agnant zone were further di.0}us.ed to addres. the flow channel boundary between the flowi.g and s.ati. s.li.s.i. the di.0}harge was.i. a funnel pattern. Res.lts.als. s.owed the effects.of a double-cone i.s.rt on the flow patterns.whi.h con- verted s.los.from funnel flow to mas. flow up to a certai. hopper i.cli.ati.n angle and would i.prove the flow pattern even for s.allower angles. Experi.ents.were carri.d out to veri.y s.me of the predi.ted res.lts. s.me quali.ati.e compari.0}ns.were made between the predi.ted res.lts.and experi.ental mea- s.rements. whi.h i.di.ated that further efforts.are needed i. predi.ti.g the s.ape of the s.agnant zone （flow channel boundary） duri.g funnel flow di.0}harges.

关键词： Di.0}harge pattern Flow boundary Double-cone i.s.rt FE analys.s Preli.i.ary veri.i.ati.n

Demons.rati.n of a low‐complexi.y memory‐polynomi.l‐ai.ed neural network equali.er for CAP vi.0}ble‐li.ht communi.ati.n wi.h s.perlumi.es.ent di.de

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Opto-Electroni. Advances 2020年第8期3卷 1-11页

作者： Fangchen Hu Jorge A.Holgui.-Lerma Yuan Mao Peng Zou Chao s.en Ti.n Khee Ng Boon s.ooi Nan Chi Key Laboratory for i.formati.n s.i.nce of Electromagneti. Waves.MoE) Fudan UniversityShanghai 200433China Photoni.s.Laboratory King Abdullah University of Science and Technology(KAUST)Thuwal 23955-6900Saudi Arabia

Vi.0}ble-li.ht communi.ati.n(VLC)s.ands.as.a promi.0}ng component of the future communi.ati.n network by provi.i.g hi.h-capaci.y,low-latency,and hi.h-s.curi.y wi.eles. *** di.de(s.D)i.0}propos.d as.a new li.ht emi.ter i. the VLC s.s.em due to i.s.properti.s.of droop-free emi.0}i.n,hi.h opti.al power dens.ty,and low *** thi.0}paper,we analyze a VLC s.s.em bas.d on s.D,demons.rati.g effecti.e i.plementati.n of carri.rles. ampli.ude and phas. modulati.n(CAP).We create a low-complexi.y memory-polynomi.l-ai.ed neural network(MPANN)to replace the tradi.i.nal fi.i.e i.puls. res.ons.(Fi.)pos.-equali.ati.n fi.ters.of CAP,leadi.g to s.gni.i.ant mi.i.ati.n of the li.ear and nonli.ear di.0}orti.n of the VLC *** MPANN s.ows.a gai. i. Q factor of up to 2.7 dB hi.her than other equali.ers.and more than four ti.es.lower complexi.y than a s.andard deep neural network(DNN),hence,the propos.d MPANN opens.a pathway for the next generati.n of robus. and effi.i.nt neural network equali.ers.i. *** experi.entally demons.rate a proof-of-concept 2.95-Gbi./s.trans.i.0}i.n us.ng MPANN-ai.ed CAP wi.h 16-quadrature ampli.ude modulati.n(16-QAM)through a 30-cm channel bas.d on the 442-nm blue s.D emi.ter.

关键词： s.perlumi.es.ent di.de vi.0}ble-li.ht communi.ati.n neural network