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Implementation of an All-Optical NOR Gate Using a Multi-w.velength.Injection-Locked Diode Laser

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光学学报 2003年第S1期23卷 397-398页

作者： K. K. Quresh. L. Y. Ch.n P. K. A. w.i L. F. K. Lui w. h. chung h.0}-yaw.Tam Ph.tonics Research.Center Department of Electrical Engineering The Hong Kong Polytechnic University Hung Horn Hong Kong. Ph.tonics Research.Center Department of Electronic and Information Engineering The Hong Kong Polytechnic University Hung Horn Hong Kong.

w. demonstrated an all optical NOR gate operating at 10 Gb/s using a multi-w.velength.mutual injection-locked Fabry-Perot laser diode (FP-LD).

关键词： laser diode

h.zard Prevention in Mission Plans for Aerial Veh.cles Based on Soft Institutions

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民用飞机设计与研究 2017年第3期 105-116页

作者： Flavio S. Correa da Silva Paul w. h. chung Marcelo K. Zuffo Petros Papapanagiotou David Robertson w.mberto Vasconcelos University of Sao Paulo Sao Paulo Brazil Lough.orough.University Loughborough UK University of Edinburgh Edinburgh UK University of Aberdeen Aberdeen UK

h.zard prevention in mission plans requires careful analysis and appropriate tools to support th. design of preventive and/or corrective *** is most ch.llenging in systems w.th.large sets of states and complex state *** th. case of sociotech.ical systems,h.zard prevention becomes even more dicult given th.t th. beh.viour of h.man centric components can at best be partially *** th. present article w. focus on a specic class of sociotech.ical systems-namely air spaces containing pilot controlled as w.ll as autonomous aircrafts and introduce th. notion of relevant *** also introduce soft institutions as an appropriate basis for analysis,w.th.th. aim of addressing relevant *** concept of soft institutions is draw. from specication languages for interaction betw.en agents in multi-agent systems but,in our case,is adapted for use in systems th.t combine h.man and automated actors.

关键词：空气空间自主飞行器设计原理复杂系统

Self-adh.sive pads in defi brillation or cardioversion: risks due to unfamiliarity and recommendations

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w.rld Journal of Emergency Medicine 2024年第1期15卷 64-66页

作者： h.nsol chung Department of Emergency Medicine Yeungnam University College of MedicineDaegu 42415Republic of Korea

During cardiopulmonary resuscitation(CPR),defibrillation,or cardioversion,th. use of self-adh.sive pads instead of conventional paddles h.s gradually become *** particular,it w.s recommended during th. COVID-19 pandemic,as it allow. defibrillation or cardioversion to be performed w.th.ut close contact betw.en th. rescuer and patient.[1,2]Self-adh.sive pads can minimize th. dow.time of ch.st compressions before and after defibrillation and protect th. patient from electric arc formation,skin burns,and fi *** th. pads are attach.d,electrocardiograph.c rh.th. analysis,defibrillation,synch.onous cardioversion,and cardiovascular support are all *** paddles,self-adh.sive pads can save time because th. application of conductive jelly,repeated positioning,and application of 10-12 kg of pressure on th. ch.st are not *** European Resuscitation Council(ERC)Guidelines 2021 state th.t th. use of self-adh.sive pads is recommended in advanced cardiovascular life support(ACLS).[3]Neverth.less,some medical staff still tend to prefer th. use of conventional paddles instead of self-adh.sive pads in h.spitals.

关键词： attach.d cardio conductive

Engineering beh.viour of in situ cored deep cement mixed marine deposits subjected to undrained and drained sh.aring

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Journal of Rock Mech.nics and Geotech.ical Engineering 2024年第5期16卷 1749-1760页

作者： w.i Li chung Yee Kw.k Faculty of Engineering China University of GeosciencesWuhan430074China Department of Civil Engineering The University of Hong Kong999000Hong Kong SARChina

Th. deep cement mixing(DCM)is used to improve th. capacity and reduce th. settlement of th. soft ground by forming cemented clay *** investigation on th. mech.nical beh.viour of th. DCM samples is limited to eith.r laboratory-prepared samples or in-situ samples under unconfined *** th.s study,a series of drained and undrained triaxial sh.aring tests w.s performed on th. in-situ cored DCM samples w.th.h.gh.cement content to assess th.ir mech.nical *** is found th.t th. drainage condition affects significantly th. stiffness,peak and residual strength. of th. DCM samples,w.ich.is mainly due to th. state of excess pore w.ter pressure at different strain levels,*** positive before th. peak deviatoric stress and negative after th. peak deviatoric stress,in th. undrained *** slope of th. failure envelope ch.nges obviously w.th.th. confining pressures,being steeper at low.r stress levels and flatter at h.gh.r stress *** strength.parameters,effective coh.sion and friction angle obtained from low.r stress levels(c′0 andφ′0)are 400 kPa and 58°,respectively,w.ich.are deemed to be true for design in most DCM applications w.ere th. in-situ stress levels are normally at low.r values of 50-200 ***,th. computed tomograph.(CT)scanning system w.s adopted to visualize th. internal structures of DCM *** is found th.t th. clay pockets existing inside th. DCM samples due to uneven mixing affect markedly th.ir stress-strain beh.viour,w.ich.is one of th. main reasons for th. h.gh.variability of th. DCM samples.

关键词： Deep cement mixing(DCM) In-situ cored sample Triaxial sh.aring Drainage condition Confining pressure Computed tomograph.(CT)

Ensemble w.nd Pow.r Prediction Interval w.th.Optimal Reserve Requirement

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

作者： h.mid Rezaie Ch.uk h.i chung Nima Safari th. Saskatch.w.n Pow.r Corporation(SaskPow.r) ReginaSaskatchewanCanada th. Department of Electrical and Computer Engineering and Department of h.man Biology University of TorontoTorontoON M5S 3G4Canada th. Alberta Electric System Operator(AESO) CalgaryAlbertaCanada

w.nd pow.r prediction interval(w.PI)models in th. literature h.ve predominantly been developed for and tested on specific case ***,w.nd beh.vior and ch.racteristics can vary significantly across ***,a prediction model th.t performs w.ll in one case migh. underperform in *** address th.s sh.rtcoming,th.s paper proposes an ensemble w.PI framew.rk th.t integrates multiple w.PI models w.th.distinct ch.racteristics to improve *** important and often overlooked factor is th. role of probabilistic w.nd pow.r prediction(w.P)in quantifying w.nd pow.r uncertainty,w.ich.sh.uld be h.ndled by operating *** reserve in w.PI framew.rks enh.nces th. efficacy of *** th.s regard,th. proposed framew.rk employs a novel bi-layer optimization approach.th.t takes both.w.PI quality and reserve requirements into *** analysis w.th.different real-w.rld datasets and various bench.ark models validates th. quality of th. obtained w.PIs w.ile resulting in more optimal reserve requirements.

关键词： Ensemble model linear programming operating reserve optimal reserve requirement prediction interval probabilistic prediction renew.ble integration uncertainty representation w.nd pow.r prediction(w.P)

Small-signal Stability Criteria in Pow.r Electronics-dominated Pow.r Systems:A Comparative Review

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Journal of Modern Pow.r Systems and Clean Energy 2024年第4期12卷 1003-1018页

作者： Qifan Ch.n Siqi Bu Ch. Yung chung Department of Electrical and Electronic Engineer The Hong Kong Polytechnic UniversityHong KongChina Department of Electrical and Electronic Engineering Shenzhen Research InstituteCentre for Grid ModernisationInternational Centre of Urban Energy NexusCentre for Advances in Reliability and SafetyResearch Institute for Smart Energyand Policy Research Centre for Innovation and TechnologyThe Hong Kong Polytechnic UniversityHong KongChina

To tackle emerging pow.r system small-signal stability problems such.as w.deband oscillations induced by th. large-scale integration of renew.ble energy and pow.r electronics,it is crucial to review.and compare existing small-signal stability analysis *** th.s basis,guidance can be provided on determining suitable analysis meth.ds to solve relevant small-signal stability problems in pow.r electronics-dominated pow.r systems(PEDPSs).Various mature meth.ds h.ve been developed to analyze th. small-signal stability of PEDPSs,including eigenvalue-based meth.ds,Routh.stability criterion,Nyquist/Bode plot based meth.ds,passivity-based meth.ds,positive-net-damping meth.d,lumped impedance-based meth.ds,bifurcation-based meth.ds,*** th.s paper,th. application conditions,advantages,and limitations of th.se criteria in identifying oscillation frequencies and stability margins are review.d and compared to reveal and explain connections and discrepancies among ***,efforts are devoted to math.matically proving th. equivalence betw.en th.se small-signal stability ***,th. performance of th.se criteria is demonstrated and compared in a 4-mach.ne 2-area pow.r system w.th.a w.nd farm and an IEEE 39-bus pow.r system w.th.3 w.nd farms.

关键词： Impedance-based meth.d oscillation analysis pow.r electronic converter pow.r electronics-dominated pow.r system renew.ble pow.r generation small-signal stability

Interplay of laser pow.r and pore ch.racteristics in selective laser melting of ZK60 magnesium alloys:A study based on in-situ monitoring and image analysis

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Journal of Magnesium and Alloys 2024年第4期12卷 1346-1366页

作者： w.ijie Xie h.u-chung Man Ch.-w.i Ch.n Department of Industrial and Systems Engineering The Hong Kong Polytechnic UniversityHong KongChina Sch.ol of Mech.nical and Aerospace Engineering Queen’s UniversityBelfast BT95AHUK Research.Institute for Advanced Manufacturing The Hong Kong Polytechnic UniversityHong KongChina

Th.s study offers significant insigh.s into th. multi-ph.sics ph.nomena of th. SLM process and th. subsequent porosity ch.racteristics of ZK60 Magnesium(Mg)***-speed in-situ monitoring w.s employed to visualise process signals in real-time,elucidating th. dynamics of melt pools and vapour plumes under varying laser pow.r conditions specifically betw.en 40 w.and 60 *** morph.logical analysis w.s performed using Scanning-Electron Microscopy(SEM),demonstrating a critical correlation betw.en laser pow.r and pore *** laser pow.r led to increased pore coverage,w.ereas a denser structure w.s observed at h.gh.r laser *** laser pow.r influence on porosity w.s furth.r confirmed via Optical Microscopy(OM)conducted on both.top and cross-sectional surfaces of th. *** increase in laser pow.r resulted in a decrease in pore coverage and pore size,potentially leading to a denser printed part of Mg alloy.X-ray Computed Tomograph.(XCT)augmented th.se findings by providing a 3D volumetric representation of th. sample internal structure,revealing an inverse relationsh.p betw.en laser pow.r and overall pore *** laser pow.r appeared to favour th. formation of interconnected pores,w.ile a reduction in interconnected pores and an increase in isolated pores w.re observed at h.gh.r *** interplay betw.en melt pool size,vapour plume effects,and laser pow.r w.s found to significantly influence th. resulting porosity,indicating a need for effective management of th.se factors to optimise th. SLM process of Mg alloys.

关键词： Selective laser melting(SLM) Magnesium(Mg)alloys Biodegradable implants Porosity In-situ monitoring

Trial ch.racteristics and treatment effect estimates in randomized controlled trials of Ch.nese h.rbal medicine: A meta-epidemiological study

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Journal of Integrative Medicine 2024年第3期22卷 223-234页

作者： Betty h.w.ng Ya-li Lin Yin-yan Gao Jin-lu Song Lang Qin Ling-qi Li w.n-qi Liu Claire C.w.Zh.ng Mary Y.Jiang Ch.n Mao Xiao-bo Yang Vincent C.h.chung Irene X.Y.w. Jockey Club Sch.ol of Public h.alth.and Primary Care the Chinese University of Hong KongHong Kong 999077China Xiangya Sch.ol of Public h.alth Central South UniversityChangsha 410006Hunan ProvinceChina Sch.ol of Ch.nese Medicine the Chinese University of Hong KongHong Kong 999077China Sch.ol of Public h.alth Southern Medical UniversityGuangzhou 510080Guangdong ProvinceChina State Key Laboratory of Dampness Syndrome of Ch.nese Medicine the Second Affiliated Hospital of Guangzhou University of Chinese MedicineGuangzhou 510120Guangdong ProvinceChina Ch.nese Medicine Syndrome Research.Team the Second Affiliated HospitalGuangzhou University of Chinese MedicineGuangzhou 510120Guangdong ProvinceChina Guangdong Provincial Key Laboratory of Clinical Research.on Traditional Ch.nese Medicine Syndrome Guangzhou 510120Guangdong ProvinceChina h.nan Provincial Key Laboratory of Clinical Epidemiology Central South UniversityChangsha 410006Hunan ProvinceChina

Background:Previously publish.d meta-epidemiological studies focused on w.stern medicine h.ve identified some trial ch.racteristics th.t impact th. treatment effect of randomized controlled trials(RCTs).Neverth.less,it remains unclear if similar associations exist in RCTs on Ch.nese h.rbal medicine(Ch.).Furth.r,Ch.nese medicine-related ch.racteristics h.ve not been explored ***:To investigate trial ch.racteristics related to treatment effect estimates on Ch. *** strategy:Th.s meta-epidemiological study search.d 5 databases for systematic review. on Ch. treatment publish.d betw.en January 2011 and July *** criteria:An eligible systematic review.sh.uld only include RCTs of Ch. and conduct at least one *** extraction and analysis:Tw. review.rs independently conducted data extraction on general ch.racteristics of systematic review.,meta-analyses and included *** also assessed th. risk of bias of RCTs using th. Coch.ane risk of bias tool.A tw.-step approach.w.s used for data *** ratio of odds ratios(ROR) and difference in standardized mean differences (dSMD) w.th.95%confidence interval (CI) w.re applied to present th. difference in effect estimates for binary and continuous outcomes,***:Ninety-one systematic review.,comprising 1338 RCTs w.re *** binary outcomes,RCTs incorporated w.th.syndrome differentiation (ROR:1.23;95%CI:[1.07,1.39]),adopting Ch.nese medicine formula (ROR:1.19;95%CI:[1.03,1.34]),w.th.low.risk of bias on incomplete outcome data (ROR:1.29;95%CI:[1.06,1.52]) and selective outcome reporting (ROR:1.12;95%CI:[1.01,1.24]),as w.ll as a trial size≥100 (ROR:1.23;95%CI:[1.04,1.42]) preferred to sh.w.larger effect *** for continuous outcomes,RCTs w.th.Ch.nese medicine diagnostic criteria (dSMD:0.23;95%CI:[0.06,0.41]),judged as h.gh.unclear risk of bias on allocation concealment (dSMD:-0.70;95%CI:[-0.99,-0.42]),w.th.low.risk of bias on incomplete outcome data (dSMD:0.30

关键词： Ch.nese h.rbal medicine Randomized controlled trial Risk of bias Meta-epidemiological study Effect estimates

100 w.class green h.drogen production from ammonia at a dual-layer electrode containing a Pt-Ir catalyst for an alkaline electrolytic process

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Journal of Energy Ch.mistry 2024年第6期93卷 352-360,I0009页

作者： Dongh.un Yoon Sunki chung Minjun Ch.i Eunh.eok Yang Jaeyoung Lee Sch.ol of Earth.Sciences and Environmental Engineering Gwangju Institute of Science and Technology(GIST)Gwangju 61005Republic of Korea International Future Research.Center of Ch.mical Energy Storage and Conversion Processes GISTGwangju 61005Republic of Korea Ertl Center for Electroch.mistry and Catalysis GISTGwangju 61005Republic of Korea TKG h.ch.ms Co.Ltd 963Sangam-roYeosu-siJeollanam-do 59614Republic of Korea

Ammonia allow. storage and transport of h.drogen over long distances and is an attractive potential h.drogen *** decomposition h.s recently been used for th. conversion of ammonia to h.drogen and is regarded as a future tech.ology for production of CO_(2)-free pure ***,a h.terostructural Pt-Ir dual-layer electrode is developed and sh.w. to ach.eve successful long-term operation in an ammonia electrolyzer w.th.an anion exch.nge membrane(AEM).Th.s electrolyzer consisted of eigh. membra ne electrode assemblies(MEAs)w.th.a total geometric area of 200 cm~2 on th. anode side,w.ich.resulted in a h.drogen production rate of 25 L h.(-1).w. observed th. degradation in MEA performance attributed to ch.nges in th. anode catalyst layer during h.drogen production via ammonia ***,w. demonstrated th. relationsh.p betw.en th. ammonia oxidation reaction(AOR)and th. oxygen evolution reaction(OER).

关键词： Ammonia oxidation Dual-layer catalyst Green h.drogen Electrolytic process Oxygen evolution reaction