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Design and fabrication of computer-generated h.lograms for testing optical freeform surfaces

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Ch.nese Optics Letters 2013年第3期11卷 64-68页

作者：沈华朱日宏高志山 E. Y. B. PUN w. h. wong 朱效立 Sch.ol of Electronic Engineering and Ph.to-Electric Tech.ology Nanjing University of Science and Technology Department of Electronic Engineering City University of Hong Kong Key Laboratory of Nano-Fabrication and Novel Devices Integrated Tech.ology Institute of Microelectronic of Chinese Academy of Sciences

Freeform optical surfaces （FOSs） w.ll be th. best elements in th. design of compact optical systems in th. future. h.w.ver, it is extremely difficult to measure freeform surface w.th.sufficient accuracy, w.ich.im- pedes th. development of th. freeform surface. Th. design and fabrication of computer-generated h.logram （CGh. , w.ich.h.s been successfully applied to th. tests for asph.ric surfaces, cannot be directly adopted to test FOSs due to th.ir non-rotational asymmetry. A novel ray tracing planning meth.d combined w.th.successively optimizing even and odd pow.r coefficients of ph.se polynomials in turn is proposed, w.ich.can successfully design a non-rotational asymmetry CGh.for th. tests of FOSs w.th.an F-O lens. A new.eigh.-step fabrication process is also presented aiming to solve th. problem th.t th. linew.dth.on th. same circle of th. CGh.for testing freeform surface is not uniform. Th.s problem cannot be solved in th. original procedure of CGh.fabrication. Th. test results of th. step profiler sh.w.th.t th. CGh.fabricated in th. new.nrocedure meets th. reauirements.

关键词： Computer generated h.lograph. Design Electron h.lograph. Optical systems

室外流行音乐的声控制——以香港中心露天音乐会为例(英文)

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华南理工大学学报（自然科学版） 2007年第B10期35卷 144-149页

作者：黄永豪黄先節沛然環境评估工程顾问有限公司

只要符合噪音管制标准和在指定的时间内结束,在香港一般情况下是允许举办露天音乐会的.由环境保护署对此类活动引起的噪声加以监测和评估.作为六次葛莱美奖得主,被2005时代周刊选为世界100位最具影响的人物,霹雳舞创作人、歌手、歌曲作... 详细信息

只要符合噪音管制标准和在指定的时间内结束,在香港一般情况下是允许举办露天音乐会的.由环境保护署对此类活动引起的噪声加以监测和评估.作为六次葛莱美奖得主,被2005时代周刊选为世界100位最具影响的人物,霹雳舞创作人、歌手、歌曲作者Kanye w.st于2006年11月28日在香港举办其在亚洲唯一的一场演唱会.该演唱会在维多利亚港中心地带的西九龙全新户外场地h. Outdoor Drive-In举行,名为"轩尼诗V.S.O.P Kanye w.st"Touch.th. Sky Tour"Live in h.ng Kong",由管弦乐队伴奏并邀请本港h.p h.p界代表陈冠希作开幕演出.位于香港中心区的演唱会场地被多层可俯瞰美丽港湾的豪华住宅环绕.演出要符合严格的噪音管制条例.音乐会期间,在距舞台45m的控制台处连续监测到的声压级达到107dB(A).对此,代替传统上通常采用的依赖于声屏障的降噪技术或采用吸声内衬的方法,利用新的轻质材料和沙包成功地控制了这次音乐会的声溢出.

关键词：露天音乐会噪声控制轻质声屏障可拆卸再生材料

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外延SCNN电光薄膜生长及研究

功能材料 2004年第Z1期35卷 3024-3026页

作者：张曰理陶科玉蒋志洁 MAK C L wong w.h.Ch.Y C L 中山大学光电材料与技术国家重点实验室物理系广东广州510275 中山大学光电材料与技术国家重点实验室物理系广东广州510275 中山大学光电材料与技术国家重点实验室物理系广东广州510275 香港理工大学应用物理系和材料研究中心香港理工大学应用物理系和材料研究中心香港理工大学应用物理系和材料研究中心

用激光脉冲沉积(PLD)法在MgO(001)衬底上成功地生长、制备出了外延铌酸锶钡钠(SCNN)电光薄膜.对生长制备出的SCNN电光薄膜用X射线衍射对其微观结构进行了测量研究;X射线衍射结果显示:生长在MgO(001)衬底上的SCNN电光薄膜是外延膜;对生长... 详细信息

用激光脉冲沉积(PLD)法在MgO(001)衬底上成功地生长、制备出了外延铌酸锶钡钠(SCNN)电光薄膜.对生长制备出的SCNN电光薄膜用X射线衍射对其微观结构进行了测量研究;X射线衍射结果显示:生长在MgO(001)衬底上的SCNN电光薄膜是外延膜;对生长在MgO(001)衬底上的外延SCNN电光薄膜在200～900nm光谱范围的透射光谱进行了测量研究,通过对薄膜透射光谱的振荡曲线分析计算得到了SCNN电光薄膜的光学常数,结果发现外延SCNN电光薄膜的折射率符合单电子模型.

关键词： SCNN薄膜 PLD

Th. electrow.ak monopole–antimonopole pair in th. standard model

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Communications in Th.oretical Ph.sics 2024年第3期76卷 113-119页

作者： Dan Zh. Kh.i-Ming wong Guo-Quan wong Sch.ol of Ph.sics Universiti Sains Malaysia11800 USMPenangMalaysia

w. present th. first numerical solution th.t corresponds to a pair of Ch.–Maison monopoles and antimonopoles(MAPs) in th. SU(2) × U(1) w.inberg–Salam(w.) *** monopoles are finitely separated,w.ile each.pole carries a magnetic ch.rge ±4π/*** positive pole is situated in th. upper h.misph.re,w.ereas th. negative pole is in th. low.r *** Ch.–Maison MAP is investigated for a range of w.inberg angles,0.4675≤ tan θ_(w.≤10,and h.ggs self-coupling,0 ≤ β ≤ *** magnetic dipole moment(μm) and pole separation(d_(z)) of th. numerical solutions are calculated and *** total energy of th. system,h.w.ver,is infinite due to point singularities at th. locations of monopoles.

关键词： magnetic monopole Ch.-Maison monopole w.inberg-Salam model

Synth.tic broch.somes:Design,synth.sis,and applications

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Nano Research 2024年第2期17卷 734-742页

作者： Lin w.ng Jinsol Ch.i Tak-Sing wong Department of Mech.nical Engineering The Pennsylvania State UniversityUniversity ParkPA 16802USA Materials Research.Institute The Pennsylvania State UniversityUniversity ParkPA 16802USA Department of Biomedical Engineering The Pennsylvania State UniversityUniversity ParkPA 16802USA

Broch.somes,w.ich.are nanoscopic buckyball-sh.ped granules produced by leafh.ppers,are one of th. most intricate structures discovered in *** functions of broch.somes h.ve been proposed but only a few.h.ve been experimentally validated due to th. ch.llenge of fabricating th.ir synth.tic *** in micro-and nanofabrication h.ve recently led to th. emergence of synth.tic broch.somes,opening up new.possibilities for innovative *** review.explores th. early discovery of natural broch.somes and th.ir geometrical features,follow.d by th. recent progress in fabricating synth.tic broch.somes and th.ir *** on future applications and ch.llenges in th. scalable manufacturing of synth.tic broch.somes are discussed.

关键词： synth.tic broch.somes leafh.pper antireflection superh.droph.bicity surface-enh.nced Raman scattering ph.tocatalyst energy h.rvesting

Artificial intelligence analysis of videos to augment clinical assessment:an overview

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Neural Regeneration Research 2024年第4期19卷 717-718页

作者： David C.wong Stefan w.lliams University of Leeds Leeds Teach.ng h.spitals Trust LeedsUK

Observation is a fundamental part of th. practice of clinical *** of movement is particularly important for th. *** such.as Parkinson’s disease,multiple sclerosis,stroke,epilepsy,and many oth.rs affect a person’s movement in ch.racteristic *** some conditions,ch.nges in th. patient’s voice can be included in th.s-ch.nges in sound caused by ch.nges in th. movements of *** clinician’s detection of a ch.racteristic abnormality,and th.ir judgment of its severity,plays a central role in both.diagnosis and th. assessment of prognosis or response to ***,th.t practice depends upon a limited resource of experienced *** addition,th.se experts are limited by h.man visual judgment,w.ich.cannot reliably or precisely detect and measure small or subtle ch.nges in movement(w.lliams et al.,2023).

关键词： clinical epilepsy diagnosis

Free-electron crystals for enh.nced X-ray radiation

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Ligh.(Science & Applications) 2024年第7期13卷 1299-1309页

作者： Lee w.i w.sley wong Xih.ng Sh. Aviv Karnieli Jeremy Lim Suraj Kumar Sergio Carbajo Ido Kaminer Liang Jie wong Sch.ol of Electrical and Electronic Engineering Nanyang Technological University50 Nanyang AvenueSingapore 639798Singapore. Solid State Institute and Faculty of Electrical and Computer Engineering Technion–Israel Institute of TechnologyHaifa 3200003Israel. Sch.ol of Electrical Engineering Fleischman Faculty of EngineeringTel Aviv UniversityTel Aviv 69978Israel Department of Applied Ph.sics Stanford UniversityStanfordCA 94305USA. Science Mathematics and TechnologySingapore University of Technology and Design8 Somapah RoadSingapore 487372Singapore. Electrical and Computer Engineering Department UCLA420 WestwoodLos AngelesCA 90095USA. Ph.sics and Astronomy Department UCLA475 Portola PlazaLos AngelesCA 90095USA. SLAC National Accelerator Laboratory Stanford University2575 Sand Hill RoadMenlo ParkCA 94025USA

Bremsstrah.ung—th. spontaneous emission of broadband radiation from free electrons th.t are deflected by atomic nuclei—contributes to th. majority of X-rays emitted from X-ray tubes and used in applications ranging from medical imaging to semiconductor ch.p ***,w. sh.w.th.t th. bremsstrah.ung intensity can be enh.nced significantly—by more th.n th.ee orders of magnitude—th.ough.sh.ping th. electron w.vefunction to periodically overlap w.th.atoms in crystalline ***,w. sh.w.h.w.to sh.pe th. bremsstrah.ung X-ray emission pattern into arbitrary angular emission profiles for purposes such.as unidirectionality and ***,w. find th.t th.se enh.ncements and sh.ped emission profiles cannot be attributed solely to th. spatial overlap betw.en th. electron probability distribution and th. atomic centers,as predicted by th. paraxial and nonrecoil th.ory for free electron ligh. *** w.rk h.gh.igh.s an unprecedented regime of free electron ligh. emission w.ere electron w.vesh.ping provides multi-dimensional control over practical radiation processes like *** results pave th. w.y tow.rds greater versatility in table-top X-ray sources and improved fundamental understanding of quantum electron-ligh. interactions.

关键词： overlap attributed arbitrary

Tribological beh.vior of lubricant-impregnated porous polyimide

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Friction 2024年第4期12卷 711-725页

作者： Jinbang LI Ningning Zh.U Janet S.S.wong Sch.ol of Mech.nical Engineering and Mech.nics Ningbo UniversityNingbo 315211China Beijing Key Laboratory of Long-life Tech.ology of Precise Rotation and Transmission Mech.nisms Beijing Institute of Control EngineeringBeijing 100029China Department of Mech.nical Engineering Imperial College LondonLondon SW72AZUK

Porous materials impregnated w.th.lubricants can be used in conditions w.ere limited lubricant is *** th.s w.rk,th.ee porous polyimides(PPI)w.th.different densities w.re ***(PAO)impregnated PPI(iPPI)discs w.re rubbed against steel and sapph.re *** operando observations of th. iPPI-sapph.re contacts sh.w.th.t oil is released under an applied load,forming a meniscus around *** at th. outlet is created at h.gh.sliding *** amount of released oil increases w.th.increasing PPI *** moduli,E*,estimated based on th. actual contact size sh.w.th.t trapped oil in iPPIs contributes to load *** h.gh.r speeds,tribological reh.dration of th. contact occurs in low.density iPPI,w.th.th.t E*rises w.th.*** h.gh.density PPIs,h.gh.speeds give a constantly h.gh.E*w.ich.is limited by th. viscoelastic properties of th. PPI netw.rk and possibly th. rate of oil *** of iPPI-steel contacts is governed by th. mech.nical properties of th. PPI,th. flow.of th. lubricant,and th. rough.ess of th. PPI *** low.and medium-density(h.gh.y porous,h.gh.rough.ess)PPIs,large amount of oil is released,and lubrication is mainly via lubricant restricted in th. contact in th. pores and possibly tribological *** h.gh.density(low.porosity)PPI,w.th.low.r rough.ess,h.drodynamic lubrication is ach.eved w.ich.gives th. low.st *** results sh.w.th.t polymeric porous materials for effective lubrication require th. optimization of its surface rough.ess,stiffness,oil flow.and oil retentions.

关键词： polyimide porous material friction mech.nism polymer limited lubrication

Metallic Microcavity-A Class of Ph.tonic Crystal

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Metallic Microcavity-A Class of Photonic Crystal