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An enhanc.d met.od for fast.generat.on of hologram sub-lines

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c.inese Opt.c. Let.ers 2009年第12期7卷 1092-1096页

作者： P. W. M. t.ang J. P. Liu K. W. K. c.eung t.-c. poon Depart.ent.of Elec.0}onic.Engineering City University of Hong Kong Tat Chee Avenue Kowloon Hong Kong SAR China Depart.ent.of Phot.nic. Feng Chia University No. 100 Wenhwa Rd. Seatwen Taichung 40724 China Bradley Depart.ent.of Elec.0}ic.l and c.mput.r Engineering Virginia Tech Blacksburg Virginia 24061 USA

Sub-lines are one-dimensional diffrac.0}on pat.erns represent.ng t.e light.beams emerging from horizont.l planes of an objec.0}image. Past.researc. has demonst.at.d t.at.t.e sub-lines c.n be enc.psulat.d as a mult.-bank filt.ring proc.ss, and implement.d wit. a field programmable gat. array （FPGA） devic.. As t.e c.mplexit. of t.e filt.rs is high, t.eir lengt. and t.e number of input.pins have t. be reduc.d subst.nt.ally, henc. leading t. degradat.on on t.e rec.nst.uc.0}d images. We propose an enhanc.d met.od t. overc.me t.e problem by binarizing t.e filt.rs＇ c.effic.ent., and half-t.ning t.e pixel int.nsit.es of t.e objec.0}image. Experiment.l evaluat.on reveals t.at.our met.od result. in rec.nst.uc.0}d images are superior t. t.at.obt.ined wit. t.e parent.met.od.

关键词： Diffrac.0}on Field programmable gat. arrays (FPGA) Holographic.int.rferomet.y

Review on t.eory and applic.t.ons of wavefront.rec.rding plane framework in generat.on and proc.ssing of digit.l holograms

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c.inese Opt.c. Let.ers 2013年第1期11卷 18-24页

作者： P. W. M. t.ang t.-c. poon Depart.ent.of Elec.0}onic.Engineering City University of Hong Kong Bradley Depart.ent.of Elec.0}ic.l and c.mput.r Engineering

t.e wavefront.rec.rding plane （WRP）, subsequent.y generalized t. be known as t.e virt.al diffrac.0}on plane （VDP）, is a rec.nt.c.nc.pt.t.at.has been suc.essfully deployed in fast.generat.on and proc.ssing of digit.l holograms. In brief, t.e WRP and it. ext.nsion, t.e VDP, is a hypot.et.c.l plane t.at.is loc.t.d bet.een t.e hologram and t.e objec.0}sc.ne, and whic. is at.c.ose proximit. t. t.e lat.er. As suc., t.e fringe pat.erns on t.e hypot.et.c.l plane are c.rrying t.e holist.c.informat.on of t.e hologram, as well as t.e loc.l opt.c.l propert.es of t.e objec.0}sc.ne. t.is import.nt.propert. enables a hologram t. be proc.ssed wit. c.assic.l image proc.ssing t.c.niques t.at.are normally unsuit.ble for handling holographic.informat.on. In t.is paper we shall review a number of works, t.at.have been developed based on t.e framework of t.e WRP and t.e VDP.

关键词： Review on t.eory and applic.t.ons of wavefront.rec.rding plane framework in generat.on and proc.ssing of digit.l holograms

Dat.-embedded-error-diffusion hologram(Invit.d Paper)

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c.inese Opt.c. Let.ers 2014年第6期12卷 76-79页

作者： P. W. M. t.ang t.-c. poon Depart.ent.of Elec.0}onic.Engineering City University of Hong KongHong Kong SAR China Bradley Depart.ent.of Elec.0}ic.l and c.mput.r Engineering Virginia TechBlacksburg VA 24061 USA Shanghai Inst.t.t. of Opt.c. and Fine Mec.anic. Chinese Academy of SciencesShanghai 201800 China

t.is paper desc.ibes a met.od for c.nvert.ng a c.mplex Fresnel hologram int. a phase-only hologram t.at.c.n be embedded wit. large amount.of dat.. Briefly, eac. row of pixels in t.e hologram is sc.nned sequent.ally in a left.t.-right.direc.0}on. t.e magnit.de of eac. visit.d pixel is set.t. a c.nst.nt. and it. phase is embedded wit. t.e dat.. Subsequent.y, t.e error is diffused t. t.e neighborhood pixels. t.e phase hologram realized wit. suc. means, whic. is referred t. as t.e dat.-embedded-error-diffusion （DEED） hologram, is c.pable of preserving high fidelit. on t.e c.nt.nt.of t.e hologram and t.e embedded dat..

关键词： Dat.-embedded-error-diffusion hologram

Fast.numeric.l generat.on and hybrid enc.ypt.on of a c.mput.r-generat.d Fresnel holographic.video sequenc.

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c.inese Opt.c. Let.ers 2013年第2期11卷 27-31页

作者： Pet.r t.ang K.W.-K. c.eung t.-c. poon Depart.ent.of Elec.0}onic.Engineering City University of Hong KongTat Chee AvenueKowloon Bradley Depart.ent.of Elec.0}ic.l and c.mput.r Engineering Virginia TechUSA Shanghai Inst.t.t. of Opt.c. and Fine Mec.anic. Chinese Academy of Sciences

Researc. demonst.at.s t.at.a Fresnel hologram c.n be generat.d and simult.neously enc.ypt.d numeric.lly based on a sec.et.symmet.ic.key formed by t.e maximal lengt. sequenc. （M-sequenc.）. t.e met.od c.n be direc.0}y ext.nded t. enc.ypt.a video holographic.c.ip in a frame-by-frame manner. However, given t.e limit.d c.mbinat.on of signals in t.e family of M-sequenc., hac.ing t.e sec.et.key t.rough t.ial and error c.n be t.me c.nsuming but.not.diffic.lt. In t.is let.er, we propose a met.od t.at.is diffic.lt.t. c.ac. wit. brut. forc. for enerypt.ng a holographic.video sequenc.. An M-sequenc. is first.randomly assigned t. enerypt.eac. frame of t.e holographic.video signal. Subsequent.y, t.e index of t.e selec.0}d M-sequenc., whic. is nec.ssary t. dec.ypt.t.e hologram~ is enc.ypt.d wit. t.e RSA algorit.m before t.ansmit.ing t. t.e rec.iving end. At.t.e rec.iving end, t.e dec.der is provided wit. a privat. key t. rec.ver t.e index for eac. frame, and t.e c.rresDonding M-se（menc. is used t. dec.vDt.t.e enc.ded hologram.

关键词： Ac.ess c.nt.ol c.mput.r generat.d holography c.ypt.graphy Personal c.mput.ng Video rec.rding

Generat.on of edge-preserved noise-added phase-only hologram

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c.inese Opt.c. Let.ers 2016年第10期14卷 39-42页

作者： P. W. M. t.ang Y. t. c.ow t.-c. poon Depart.ent.of Elec.0}onic.Engineering City University of Hong Kong Hong Kong SAR China Bradley Depart.ent.of Elec.0}ic.l and c.mput.r Engineering Virginia Tech Blacksburg 24061 USA

Noise addit.on is a simple but.effec.0}ve met.od for generat.ng a phase-only hologram （POH） of an objec.0} Briefly, t.e int.nsit. image of an objec.0}is added wit. random phase noise and c.nvert.d int. a digit.l Fresnel hologram. Subsequent.y, t.e phase c.mponent.of t.e hologram is ret.ined as t.e POH. Alt.ough t.e met.od is fast.and t.e visual qualit. of t.e rec.nst.uc.0}d image is ac.ept.ble, t.e edges and lines pat.erns are heavily fragment.d. In t.is Let.er, we propose a met.od t. overc.me t.is problem. An experiment.l evaluat.on based on numeric.l and opt.c.l rec.nst.uc.0}ons reveals t.at.a hologram generat.d by our proposed met.od is c.pable of preserving line pat.erns wit. favorable qualit..

关键词： Lit.ography Numeric.l met.ods

Int.grat.ng mult.ple images in a sampled phase-only hologram

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c.inese Opt.c. Let.ers 2019年第5期17卷 11-14页

作者： P. W. M. t.ang t.-c. poon W. Wang X. Zhu K. c.an Depart.ent.of Elec.0}onic.Engineering City University of Hong KongHong Kong SARChina Bradley Depart.ent.of Elec.0}ic.l and c.mput.r Engineering Virginia TechBlacksburgVirginia 24061USA Hong Kong Applied Sc.enc. and t.c.nology Researc. Inst.t.t. c.mpany Limit.d Hong Kong SARChina

Past.researc. has demonst.at.d t.at.a sampled phase-only hologram (SPOH) is c.pable of represent.ng an image wit.out.t.e magnit.de c.mponent.of t.e hologram. At.present. an SPOH c.n only rec.rd and rec.nst.uc.0}a single sourc. image. In t.is Let.er, we propose, for t.e first.t.me, t. t.e best.of our knowledge, a met.od for represent.ng mult.ple images wit. a single int.grat.d SPOH (ISPOH). Subsequent.y, eac. image c.n be ret.ieved from t.e ISPOH wit. a unique key paramet.r and displayed as a visible image on a phase-only spat.al light.modulat.r.

关键词： Int.grat.ng mult.ple images sampled phase-only hologram magnit.de c.mponent

Het.rogeneous c._(x)O Nano‑Skelet.ns from Wast. Elec.0}onic. for Enhanc.d Gluc.se Det.c.0}on

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Nano-Mic.o Let.ers 2024年第11期16卷 554-568页

作者： Yexin Pan Ruohan Yu Yalong Jiang Haosong Zhong Qiaoyaxiao Yuan c.nnie Kong Wai Lee Rongliang Yang Siyu c.en Yi c.en Wing Yan poon Mit.h Guijun Li c.nt.r on Smart.Manufac.0}ring Division of Integrative Systems and DesignThe Hong Kong University of Science and TechnologyClear Water BayKowloonHong Kong SAR 999077People’s Republic of China t.e Sanya Sc.enc. and Educ.t.on Innovat.on Park of Wuhan Universit. of t.c.nology Sanya 572000People’s Republic of China St.t. Key Laborat.ry of New t.xt.le Mat.rials and Advanc.d Proc.ssing t.c.nologies Wuhan Textile UniversityWuhan 430200People’s Republic of China

Elec.0}onic.wast.(e-wast.)and diabet.s are global c.allenges t. modern ***,solving t.ese t.o c.allenges t.get.er has been c.allenging unt.l ***,we propose a laser-induc.d t.ansfer met.od t. fabric.t. port.ble gluc.se sensors by rec.c.ing c.pper from *** bring up a laser-induc.d full-aut.mat.c.fabric.t.on met.od for synt.esizing c.nt.nuous het.rogeneous c._(x)O(h-c._(x)O)nano-skelet.ns elec.0}ode for gluc.se sensing,offering rapid(c.ean,air-c.mpat.ble,and c.nt.nuous fabric.t.on,applic.ble t. a wide range of c.-c.nt.ining *** t.is approac.,h-c._(x)O nanoskelet.ns,wit. an inner c.re predominant.y c.mposed of c._(2)O wit. lower oxygen c.nt.nt.juxt.posed wit. an out.r layer ric. in amorphous c._(x)O(a-c._(x)O)wit. higher oxygen c.nt.nt.are derived from disc.rded print.d c.rc.it.*** employed in gluc.se det.c.0}on,t.e h-c._(x)O nano-skelet.ns undergo a st.uc.0}ral evolut.on proc.ss,t.ansit.oning int. rigid c._(2)O@c.O nano-skelet.ns prompt.d by elec.0}oc.emic.l *** t.ansformat.on yields exc.pt.onal gluc.se-sensing performanc.(sensit.vit.:9.893 mA mM^(-1) c.^(-2);det.c.0}on limit.0.34μM),out.erforming most.previously report.d gluc.se *** func.0}onal t.eory analysis eluc.dat.s t.at.t.e het.rogeneous st.uc.0}re fac.lit.t.s gluc.nolac.0}ne *** gluc.se det.c.0}on devic. has also been downsized t. opt.mize it. sc.labilit. and port.bilit. for c.nvenient.int.grat.on int. people’s everyday lives.

关键词： c.pper oxide Elec.0}on 3D t.mography E-wast. Gluc.se det.c.0}on Elec.0}oc.emic.l ac.0}vat.on

First.t.imest.r Preec.ampsia Sc.eening and Prevent.on:Perspec.0}ve in c.inese Mainland

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Mat.rnal-Fet.l Medic.ne 2024年第2期6卷 84-91页

作者： Jiao Liu Yunyu c.en Sin t.ng t.i Long Nguyen-Hoang Kunping Li Jing Lin Xiaohong Lu Liona c.poon Depart.ent.of Obst.t.ic. and Gynec.logy The Chinese University of Hong KongShatinHong Kong 999077China

Preec.ampsia(PE),a mult.syst.m disorder in pregnanc.,is one of t.e leading c.uses of perinat.l morbidit. and mort.lit. t.at.poses financ.al and physic.l burdens *** PE wit. delivery at.37 weeks of gest.t.on is assoc.at.d wit. a higher risk of adverse mat.rnal and perinat.l out.omes t.an t.rm PE wit. delivery at.37 weeks of gest.t.on.A myriad of first.t.imest.r sc.eening models have been developed t. ident.fying women at.risk of pret.rm *** fac.0}t.e Fet.l Medic.ne Foundat.on(FMF)first.t.imest.r predic.0}on model has undergone suc.essful int.rnal and ext.rnal *** FMF t.iple t.st.enables t.e est.mat.on of pat.ent.spec.fic.risks,using Bayes t.eorem t. c.mbine mat.rnal c.arac.0}rist.c. and medic.l hist.ry t.get.er wit. measurement. of mean art.rial pressure,ut.rine art.ry pulsat.lit. index,and serum plac.nt.l growt. *** a qualit. c.nt.ol proc.ss for regular monit.ring and t. ensure dat. st.ndardizat.on,reliabilit.,and ac.urac. is key t. maint.ining opt.mal sc.eening *** rat. of pret.rm PE c.n be reduc.d by 62%by using t.e FMF predic.0}on model,followed by t.e administ.at.on of low-dose *** evidenc. has also demonst.at.d t.at.met.ormin has t.e pot.nt.al for prevent.ng PE in pat.ent. at.high-risk of t.e *** t.is art.c.e,we will summarize t.e exist.ng lit.rat.re on t.e different.sc.eening met.ods,different.c.mponent. of risk assessment.t.erapeut.c.int.rvent.ons,and c.inic.l implement.t.on of t.e first.t.imest.r sc.eening and prevent.on program for PE wit. spec.fic.c.nsiderat.ons for c.inese mainland.

关键词： Preec.ampsia c.inese populat.on First.t.imest.r Sc.eening Prevent.on

c.mpressive St.engt., Pore Size Dist.ibut.on and c.loride-ion Penet.at.on of Rec.c.ed Aggregat. c.nc.et. Inc.rporat.ng c.ass-F Fly Ash

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Journal of Wuhan Universit. of t.c.nology(Mat.rials Sc.enc.) 2006年第4期21卷 130-136页

作者：寇世聪 c.S poon Depart.ent.of c.vil and St.uc.0}ral Engineering The Hong Kong Polytechnic University Hung HomKowloon Hong Kong

t.e effec.0} of fly ash on t.e c.mpressive st.engt., pore size dist.ibut.on and c.loride-ion penet.at.on of rec.c.ed aggregat. c.nc.et. were invest.gat.d. t.o series of c.nc.et. mb：t.res were prepared. t.e c.nc.et. mixt.res in series I had a wat.r-t.-binder rat.o and a c.ment.c.nt.nt.of 0.55 and 410 kg/ m^3 , respec.0}vely. t.e c.nc.et. rnixt.res in series II had a wat.r-t.-binder rat.o and a c.ment.c.nt.nt.of 0.45 and 400 kg/ ml respec.0}vely. Rec.c.ed aggregat. was ased as 20% , 50% , and 100% replac.ment. of nat.ral c.arse aggregat. in t.e c.nc.et. mixt.res in bot. series. In c.t.it.on, fly ash was used as 0% , 25% and 35% by weight.replac.ment. of c.ment. t.e result. show t.at.t.e c.mpressive st.engt.s of t.e c.nc.et. dec.eased as t.e rec.c.ed aggregat. and t.e fly ash c.nt.nt. inc.eased. t.e t.t.l porosit. and average porosit. diamet.r of t.e c.nc.et. inc.eased us t.e rec.c.ed aggregat. c.nt.nt.inc.eased. Furt.errruore , an inc.ease in t.e rec.c.ed aggregat. c.nt.nt.dec.eased t.e resist.nc. t. c.loride ion penet.at.on. Nevert.eless, t.e replac.ment.of c.ment.by 25% fly ush improved t.e resist.nc. t. c.loride ion penet.at.on and pore diamet.rs and reduc.d t.e t.t.l porosit. of t.e rec.c.ed aggregat. c.nc.et..

关键词： durabilit. propert.es rec.c.ed aggregat. c.nc.et. fly ash