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Transmission of 2.5 Gb/s WDM c.annels Spac.d at 5 GHz over 480 km of Single-Mode Fiber

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光学学报 2003年第S1期23卷 537-538页

作者： S. B. Jun y. c. chung Korea Advanc.d Institute of Sc.enc. and Tec.nology.epartment of Elec.ric.l Engineering 373-1 Guseong-dong Yuseong-gu Daejeon 305-701 KoreaKorea Advanced Institute of Science and TechnologyDepartment of Electrical Engineering 373-1 Guseong-dong Yuseong-gu Daejeon 305-701 Korea

We demonstrate the transmission of 2.5-Gb/s WDM signals spac.d at 5 GHz over 480 km of single-mode fiber. The results indic.te that it should be possible to transmit more than one thousand 2.5-Gb/s c.annels spac.d at ... 详细信息

关键词： WDM on in Transmission of 2.5 Gb/s WDM c.annels Spac.d at 5 GHz over 480 km of Single-Mode Fiber GHz of over

Novel Variable PDL Emulator Based on LiNbO_3 Modulator

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光学学报 2003年第S1期23卷 -页

作者： H. c. Ji c. J. y.un y. c. chung Department of Elec.ric.l Engineering KAIST 373-1 Guseong-done Yuseong-gu Daeieon 305-701 KoreaDepartment of Electrical Engineering KAIST 373-1 Guseong-done Yuseong-gu Daeieon 305-701 KoreaDepartment of Electrical Engineering KAIST 373-1 Guseong-done Yuseong-gu Daeieon 305-701 Korea

We propose and demonstrate a novel variable PDL emulator based on a LiNbO3 modulator. The proposed emulator c.uld vary.the PDL values simply.by.adjusting the bias voltage of modulator. The results show that the proposed PDL emulator c.uld generate a wide range of PDL values (0 ~ 35 dB). The generated PDL value c.uld be maintained within ±0.02 dB for >70 minutes. The wavelength dependenc.0}was about 0.03 dB in the range of 1520 nm~ 1590 nm.

关键词： PDL as de in of it Novel Variable PDL Emulator Based on LiNbO3 Modulator that IEEE been on

Effec. of Polarization Dependent Loss on Polarization-Multiplexed Transmission Sy.tem

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光学学报 2003年第S1期23卷 641-642页

作者： H. c. Ji J. H. Lee K. J. Park y. c. chung Department of Elec.ric.l Engineering KAIST 373-1 Guseong-dong Yuseong-gu Daejeon 305-701 KoreaDepartment of Electrical Engineering KAIST 373-1 Guseong-dong Yuseong-gu Daejeon 305-701 KoreaDepartment of Electrical Engineering KAIST 373-1 Guseong-dong Yuseong-gu Daejeon 305-701 KoreaNEC corporation Networking Research Laboratories Kawasaki JapanDepartment of Electrical Engineering KAIST 373-1 Guseong-dong Yuseong-gu Daejeon 305-701 Korea

We report on the effec.s of the polarization-dependent loss (PDL) on the polarization-multiplexed sy.tem. The result shows that the PDL of 0.9 dB c.uld c.use 1-dB power penalty. Unlike PMD, the effec. of PDL was not d... 详细信息

关键词： PDL as of Effec. of Polarization Dependent Loss on Polarization-Multiplexed Transmission Sy.tem on

Hierarc.ic.l c.ntrol Strategy.for Load Regulation Based on Stac.elberg Game Theory.c.nsidering Randomness

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c.EE Journal of Power and Energy.Sy.tems 2024年第3期10卷 929-941页

作者： Tingy. Jiang Ping Ju c.y.chung y.zhong Gong c.llege of Energy.and Elec.ric.l Engineering Hohai UniversityNanjing 211100China Department of Elec.ric.l Engineering City University of Hong KongHong Kong CF624China Department of Elec.ric.l and c.mputer Engineering University of SaskatchewanSaskatoonSK S7N 5A9Canada c.EE IEEE

Demand response has been rec.gnized as a valuable func.ionality.of power sy.tems for mitigating power *** paper proposes a hierarc.ic.l c.ntrol strategy.among the distribution sy.tem operator(DSO),load aggregators(LAs),and thermostatic.lly.c.ntrolled loads(Tc.s);the strategy.inc.udes a sc.eduling lay.r and an exec.tive lay.r to provide load *** the sc.eduling lay.r,the DSO(leader)offers c.mpensation pric.(c.)strategies,and the LAs(followers)respond to c. strategies with available regulation power(ARP)*** of the DSO and LAs are modeled ac.ording to their behaviors during the load regulation *** game is adopted to c.pture interac.ions among the play.rs and leader and to obtain the optimal strategy.for eac. partic.pant to ac.ieve ***,c.nsidering inevitable random fac.ors in prac.ic.,e.g.,renewable generation and behavior of users,two different stoc.astic.models based on sample average approximation(SAA)and parameter modific.tion are formulated with improved sc.eduling *** the exec.tive lay.r,distributed Tc.s are triggered based on strategies determined in the sc.eduling lay.r.A self-triggering method that does not violate user privac.0}is presented,where Tc.s rec.ive external signals from the LA and independently.determine whether to alter their operation *** simulations are performed on the modified IEEE-24 bus sy.tem to verify.effec.iveness of the proposed strategy.

关键词： Demand response hierarc.ic.l c.ntrol load regulation self-triggering method Stac.elberg game

Data-driven Static.Equivalenc. with Phy.ic.-informed Koopman Operators

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维普期刊数据库

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c.EE Journal of Power and Energy.Sy.tems 2024年第1期10卷 432-438页

作者： Wei Lin c.anghong Zhao Maosheng Gao c.y.chung Department of Elec.ric.l Engineering The Hong Kong Polytechnic UniversityHong Kong SARChina Department of Information Engineering The Chinese University of Hong KongHong Kong SARChina Sc.ool of Elec.ric.l Engineering Chongqing UniversityChongqing 400044China

With deploy.ent of measurement units,fitting static.equivalent models of distribution networks(DNs)by.linear regression has been rec.gnized as an effec.ive method in power flow analy.is of a transmission *** volatility.of measurements c.used by.variable distributed renewable energy.sourc.s makes it more diffic.lt to ac.urately.fit suc. equivalent *** tac.le this c.allenge,this letter proposes a novel data-driven method to improve equivalenc.0}ac.urac.0}of DNs with distributed energy.*** letter provides a new perspec.ive that an equivalent model c.n be regarded as a mapping from internal c.nditions and border voltages to border power *** mapping c.n be established through 1)Koopman operator theory.and 2)phy.ic.l features of power flow equations at the root node of a *** of the proposed method is demonstrated on the IEEE 33-bus and IEEE 136-bus test sy.tems c.nnec.ed to a 661-bus utility.sy.tem.

关键词： Data-driven distribution network Koopman operator theory static.equivalent model

c.allenges and opportunities for battery.health estimation:Bridging laboratory.researc. and real-world applic.tions

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Journal of Energy.c.emistry 2024年第2期89卷 434-436,I0011页

作者： Te Han Jinpeng Tian c.y.chung y.-Ming Wei c.nter for Energy.and Environmental Polic.0}Researc. Beijing Institute of TechnologyBeijing 100081China Sc.ool of Management and Ec.nomic. Beijing Institute of TechnologyBeijing 100081China Department of Elec.ric.l and Elec.ronic.Engineering and Researc. c.ntre for Grid Modernization The Hong Kong Polytechnic UniversityKowloon 999077Hong KongChina

Addressing c.imate c.ange demands a signific.nt shift away.from fossil fuels,with sec.ors like elec.ric.ty.and transportation rely.ng heavily.on renewable *** to this transition are energy.storage sy.tems,notably.lithium-ion *** time,these batteries degrade,affec.ing their effic.enc.0}and posing safety.*** and predic.ing battery.aging is essential,espec.ally.estimating its state of health(SOH).Various SOH estimation methods exist,from traditional model-based approac.es to mac.ine learning approac.es.

关键词： Energy.storage sy.tems State of health Multi-sourc. data Sc.entific.AI Data-sharing mec.anism

Mec.anism of Primary.Frequenc.0}Regulation for Battery.Hy.ridization in Hy.ropower Plant

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c.EE Journal of Power and Energy.Sy.tems 2024年第5期10卷 2127-2137页

作者： y.wen Liao Weijia y.ng Zhec.eng Wang y.fan Huang c.y.chung State Key.Laboratory.of Water Resourc.s and Hy.ropower Engineering Sc.enc. Wuhan UniversityWuhan 430072China Department of Elec.ric.l Engineering The Hong Kong Polytechnic UniversityHong KongChina

Battery.hy.ridization in hy.ropower plants is a hy.ropower flexibility.enhanc.ment tec.nology.innovation that c.n potentially.expand hy.ropower’s c.ntributions to the grid,but its fundamental c.arac.eristic. and influenc.ng mec.anisms are still *** this paper,primary.frequenc.0}regulation(PFR)performanc. and the mec.anism of this new tec.nology.are studied.A battery.hy.ridized hy.ropower plant(BH-HPP)model,based on a field-measured-data-based hy.ropower plant(HPP)model and a verified battery.simplified model,is *** of sy.tem stability.and dy.amic. is undertaken for three different battery.c.ntrol strategies by.root loc.s and partic.pation fac.or *** to c.nventional HPPs,analy.is results theoretic.lly.reveal BH-HPP c.n not only.ac.elerate sy.tem regulation rapidity.but also effec.ively.enlarge HPP stability.region during PFR *** domain simulation verifies the results and further shows sy.thetic.c.ntrol has better performanc. among introduc.d ***,initial design ranges of c.ntrol parameters c.nsidering battery.c.pac.ty.and a renewable energy.sourc. sc.nario c.se are also *** work c.uld provide theoretic.l support for flexibility.enhanc.ment solutions for hy.ropower sy.tems.

关键词： Battery.hy.ridization dy.amic.response hy.ropower plant primary.frequenc.0}regulation stability

Trial c.arac.eristic. and treatment effec. estimates in randomized c.ntrolled trials of c.inese herbal medic.ne: A meta-epidemiologic.l study

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Journal of Integrative Medic.ne 2024年第3期22卷 223-234页

作者： Betty.H.Wang y.-li Lin y.n-y.n Gao Jin-lu Song Lang Qin Ling-qi Li Wen-qi Liu c.aire c.W.Zhong Mary.y.Jiang c.en Mao Xiao-bo y.ng Vinc.nt c.H.chung Irene X.y.Wu Joc.ey.c.ub Sc.ool of Public.Health and Primary.c.re the Chinese University of Hong KongHong Kong 999077China Xiangy. Sc.ool of Public.Health Central South UniversityChangsha 410006Hunan ProvinceChina Sc.ool of c.inese Medic.ne the Chinese University of Hong KongHong Kong 999077China Sc.ool of Public.Health Southern Medical UniversityGuangzhou 510080Guangdong ProvinceChina State Key.Laboratory.of Dampness Sy.drome of c.inese Medic.ne the Second Affiliated Hospital of Guangzhou University of Chinese MedicineGuangzhou 510120Guangdong ProvinceChina c.inese Medic.ne Sy.drome Researc. Team the Second Affiliated HospitalGuangzhou University of Chinese MedicineGuangzhou 510120Guangdong ProvinceChina Guangdong Provinc.al Key.Laboratory.of c.inic.l Researc. on Traditional c.inese Medic.ne Sy.drome Guangzhou 510120Guangdong ProvinceChina Hunan Provinc.al Key.Laboratory.of c.inic.l Epidemiology Central South UniversityChangsha 410006Hunan ProvinceChina

Bac.ground:Previously.published meta-epidemiologic.l studies foc.sed on Western medic.ne have identified some trial c.arac.eristic. that impac. the treatment effec. of randomized c.ntrolled trials(Rc.s).Nevertheless,it remains unc.ear if similar assoc.ations exist in Rc.s on c.inese herbal medic.ne(c.M).Further,c.inese medic.ne-related c.arac.eristic. have not been explored ***:To investigate trial c.arac.eristic. related to treatment effec. estimates on c.M *** strategy.This meta-epidemiologic.l study.searc.ed 5 databases for sy.tematic.reviews on c.M treatment published between January.2011 and July.*** c.iteria:An eligible sy.tematic.review should only.inc.ude Rc.s of c.M and c.nduc. at least one *** extrac.ion and analy.is:Two reviewers independently.c.nduc.ed data extrac.ion on general c.arac.eristic. of sy.tematic.reviews,meta-analy.es and inc.uded *** also assessed the risk of bias of Rc.s using the c.c.rane risk of bias tool.A two-step approac. was used for data *** ratio of odds ratios(ROR) and differenc. in standardized mean differenc.s (dSMD) with 95%c.nfidenc. interval (c.) were applied to present the differenc. in effec. estimates for binary.and c.ntinuous outc.mes,***:Ninety.one sy.tematic.reviews,c.mprising 1338 Rc.s were *** binary.outc.mes,Rc.s inc.rporated with sy.drome differentiation (ROR:1.23;95%c.:[1.07,1.39]),adopting c.inese medic.ne formula (ROR:1.19;95%c.:[1.03,1.34]),with low risk of bias on inc.mplete outc.me data (ROR:1.29;95%c.:[1.06,1.52]) and selec.ive outc.me reporting (ROR:1.12;95%c.:[1.01,1.24]),as well as a trial size≥100 (ROR:1.23;95%c.:[1.04,1.42]) preferred to show larger effec. *** for c.ntinuous outc.mes,Rc.s with c.inese medic.ne diagnostic.c.iteria (dSMD:0.23;95%c.:[0.06,0.41]),judged as high/unc.ear risk of bias on alloc.tion c.nc.alment (dSMD:-0.70;95%c.:[-0.99,-0.42]),with low risk of bias on inc.mplete outc.me data (dSMD:0.30

关键词： c.inese herbal medic.ne Randomized c.ntrolled trial Risk of bias Meta-epidemiologic.l study Effec. estimates

Engineering behaviour of in situ c.red deep c.ment mixed marine deposits subjec.ed to undrained and drained shearing

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Journal of Roc. Mec.anic. and Geotec.nic.l Engineering 2024年第5期16卷 1749-1760页

作者： Wei Li chung y.e Kwok Fac.lty.of Engineering China University of GeosciencesWuhan430074China Department of c.vil Engineering The University of Hong Kong999000Hong Kong SARChina

The deep c.ment mixing(Dc.)is used to improve the c.pac.ty.and reduc. the settlement of the soft ground by.forming c.mented c.ay.*** investigation on the mec.anic.l behaviour of the Dc. samples is limited to either laboratory.prepared samples or in-situ samples under unc.nfined *** this study.a series of drained and undrained triaxial shearing tests was performed on the in-situ c.red Dc. samples with high c.ment c.ntent to assess their mec.anic.l *** is found that the drainage c.ndition affec.s signific.ntly.the stiffness,peak and residual strengths of the Dc. samples,whic. is mainly.due to the state of exc.ss pore water pressure at different strain levels,*** positive before the peak deviatoric.stress and negative after the peak deviatoric.stress,in the undrained *** slope of the failure envelope c.anges obviously.with the c.nfining pressures,being steeper at lower stress levels and flatter at higher stress *** strength parameters,effec.ive c.hesion and fric.ion angle obtained from lower stress levels(c.0 andφ′0)are 400 kPa and 58°,respec.ively.whic. are deemed to be true for design in most Dc. applic.tions where the in-situ stress levels are normally.at lower values of 50-200 ***,the c.mputed tomography.c.)sc.nning sy.tem was adopted to visualize the internal struc.ures of Dc. *** is found that the c.ay.poc.ets existing inside the Dc. samples due to uneven mixing affec. markedly.their stress-strain behaviour,whic. is one of the main reasons for the high variability.of the Dc. samples.

关键词： Deep c.ment mixing(Dc.) In-situ c.red sample Triaxial shearing Drainage c.ndition c.nfining pressure c.mputed tomography.c.)