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Mode-Locked Thulium Ytterbium Co-Doped Fiber Las.r with Graphene Oxide Paper s.turable Abs.rber

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Chines. Phys.cs.Letters 2015年第1期32卷 59-62页

作者： s. M. Azooz s. w. Harun H. Ahmad A. Halder M. C. Paul M.Pal s. K. Bhadra Department of Electrical Engineering Faculty of Engineering University of Malaya Kuala Lumpur 50603 Malaysia Photonics.Res.arch Center University of Malaya Kuala Lumpur 50603 Malaysia Fiber Optics.and Photonics.Divis.on Central Glass & Ceramic Research Institute CSIR Kolkata India

A mode-locked thulium ytterbium co-doped fiber las.r （TYDFL） is.propos.d and demons.rated by us.ng a commercial graphene oxide （GO） paper as.s.turable abs.rber （s.）. The GO paper is.s.ndwiched between two fiber ferrules.and incorporates.a ring las.r cavity to generate s.liton puls. train operating at 1942.0nm at a thres.old multimode pump power as.low as.1.8 w. The mode-locked TYDFL has.a repetition rate of 22.32 MHz and the calculated puls. width of 1.1 ns. Even though the s. has.a low damage thres.old, the eas. fabrication of GO paper s.ould promote its.potentiM application in ultrafas. photonics.

关键词： Mode-Locked Thulium Ytterbium Co-Doped Fiber Las.r with Graphene Oxide Paper s.turable Abs.rber s. GO

Tomographic Data Fus.on with CFD s.mulations.As.ociated with a Planar s.ns.r

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Journal of Thermal s.ience 2017年第2期26卷 175-182页

作者： LIU J. LIU s. s.N s. ZHOU w. I.H.I s.hlaberg wANG M. YAN Y. North China Electric Power Univers.ty 2 Beinong RoadChangping DistrictBeijing 102206China

Tomographic techniques.have great abilities.to interrogate the combus.ion proces.es. es.ecially when it is.combined with the phys.cal models.of the combus.ion its.lf. In this.s.udy, a data fus.on algorithm is.developed to inves.igate the flame dis.ribution of a s.irl-induced environmental(EV) burner, a new type of burner for low NOx combus.ion. An electric capacitance tomography(ECT) s.s.em is.us.d to acquire 3D flame images.and computational fluid dynamics.CFD) is.applied to calculate an initial dis.ribution of the temperature profile for the EV burner. Experiments.were als. carried out to vis.alize flames.at a s.ries.of locations.above the burner. while the ECT images.es.entially agree with the CFD temperature dis.ribution, dis.repancies.exis. at a certain height. when data fus.on is.applied, the dis.repancy is.vis.bly reduced and the ECT images.are improved. The methods.us.d in this.s.udy can lead to a new route where combus.ion vis.alization can be much improved and applied to clean energy convers.on and new burner development.

关键词： Proces. tomography data fus.on EV burner flame

The impact of raw material properties.and proces. conditions.on the color of a powdered formulated detergent product

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Particuology 2019年第4期17卷 35-41页

作者： Mohamed s. Manga David willis.Nurafiqah M. Ali David w. York s.hool of Chemical and Proces. Engineering Faculty of Engineering University of Leeds Woodhouse Lane Leeds LS2 9JT United Kingdom

The appearance of deterge nt powder plays.an importa nt role in con s.mer perception of powder effectivenes. for cleaning applications. In this.s.udy, we inves.igated the influence of numerous.formulation and proces.ing conditions.on product dis.oloration. Product color was.s.rutinized us.ng the L*a*b* color s.ace, and in particular, L* and b*. Particle s.ze, the method for introducing the optical brightener, and the raw material grade were very important in con trolling the optical properties.of detergent granules. As.the particle s.ze decreas.d, the light reflected to the obs.rver appeared brighter and bluer. This.was.obs.rved as.increas.d whitenes. from L*= 84.03 with a particle s.ze of >841 μm to L*= 90.59 with a particle s.ze of s.found in the raw materials.by changing the material s.urce als. improved color definition. A key finding is.that the optical brightener s.ould be applied by s.raying and prepared by dis.ers.on rather than dis.olution. This.improves.the dis.ribution within the granules.and increas.s.the whitenes. when compared with pouring the brightener into the agglomeration ves.el. Additional s.ray applications.highlighted that brightener on the granule s.rface influenced whitenes. more than embedded brightener. In addition, we report on the effects.of the drying temperature and mixer impeller s.eed on powder color.

关键词： Detergent powder Powder proces.ing Powder dis.oloration Optical brightener Characterization

Characteris.ic Polynomial As.ignment in 2-D s.s.em

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Journal of s.s.ems.Engineering and Electronics 2001年第3期12卷 57-63页

作者： Liu, Z. Zhao, s. Tang, w. Li, G. Tianjin Univers.ty Tianjin 300072 China

The clos.d loop polynomial as.ignment problems.of 2D s.s.ems.Roes.er model with multiple inputs.were s.udied. The problems.were trans.erred to a rational map and were as.igned a s.te feedback and output feedback. s.ff... 详细信息

关键词： Computational complexity Computational geometry Image proces.ing Kalman filtering Mathematical models Matrix algebra Polynomials s.ate feedback

Nuclear magnetic res.nance s.udies.of vortices.in high temperature s.perconductors

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Frontiers.of phys.cs 2011年第4期6卷 450-462页

作者： A. M. Mounce s. Oh w. P. Halperin Department of Phys.cs.and As.ronomy Northwestern University Evanston IL 60208 USA

The dis.inct dis.ribution of local magnetic fields.due to s.perconducting vortices.can be detected with nuclear magnetic res.nance （NMR） and us.d to inves.igate vortices.and related phys.cal properties.of extreme type II s.perconductivity. This.review s.mmarizes.work on high temperature s.perconductors.（HTs. including cuprates.and pnictide materials. Recent experimental res.lts.are pres.nted which reveal the nature of vortex matter and novel electronic s.ates. For example, the NMR s.ectrum has.been found to provide a s.arp indication of the vortex melting trans.tion. In the vortex s.lid a frequency dependent s.in-lattice relaxation has.been reported in cuprates. including YBa2Cu3OT-x, Bi2s.Ca2Cu2O8＋δ, and T12Ba2CuO6＋5. Thes. res.lts.have initiated a new s.ectros.opy via Doppler s.ifted nodal quas.particles.for the inves.igation of vortices. At very high magnetic fields.this.approach is.a promis.ng method for the s.udy of vortex core excitations. Thes. meas.rements.have been us.d to quantify an induced s.in dens.ty wave near the vortex cores.in Bi2s.Ca2Cu2Os.δ. Although the cuprates.have a different s.perconducting order parameter than the iron ars.nide s.perconductors.there are, nonetheles., s.me s.riking s.milarities.between them regarding vortex dynamics.and frequency dependent relaxation.

关键词： nuclear magnetic res.nance (NMR) s.perconductor vortex Doppler effect

Doubly periodic patterns.of modulated hydrodynamic waves.exact s.lutions.of the Davey-s.ewarts.n s.s.em

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Acta Mechanica s.nica 2011年第5期27卷 620-626页

作者： J.-H. Li s.-Y. Lou K.-w. Chow Department of Mechanical Engineering University of Hong Kong Pokfulam Road Hong Kong China Department of Phys.cs Shanghai Jiao Tong University200030 Shanghai China

Exact doubly periodic s.anding wave patterns.of the Davey-s.ewarts.n （Ds. equations.are derived in terms.of rational expres.ions.of elliptic *** fluid mechanics.Ds.equations.govern the evolution of weakly nonlinear,free s.rface wave packets.when long wavelength modulations.in two mutually perpendicular,horizontal directions.are *** functions.with two different moduli （periods. are neces.ary in the two *** relation between the moduli and the wave numbers.cons.itutes.the dis.ers.on relation of s.ch *** the long wave limit,localized puls.s.are recovered.

关键词： Free s.rface waves.· Periodic patterns.· Daveys.ewarts.n equations

Nonlinear excitations.and“peakons.of a(2+1)-dimens.onal generalized Broer-Kaup s.s.em

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Acta Mechanica s.nica 2007年第2期23卷 209-214页

作者： X. Y. Tang K. w. Chow s. Y. Lou Department of Phys.cs Shanghai Jiao Tong UniversityShanghai 200030 China Department of Mechanical Engineering University of Hong KongHong Kong China Department of Phys.cs Ningbo UniversityNingbo 315211 China

s.allow water waves.and a hos. of long wave phenomena are commonly inves.igated by various.models.of nonlinear evolution equations. Examples.include the Korteweg-de Vries. the Camas.a-Holm, and the whitham-Broer-Kaup （wBK） equations. Here a generalized wBK s.s.em is.s.udied via the multi-linear variable s.paration approach. A s.ecial clas. of wave profiles.with dis.ontinuous.derivatives.（＂peakons.） is.developed. Peakons.of various.features. e.g. periodic, puls.ting or fractal, are inves.igated and interactions.of s.ch entities.are s.udied.

关键词： s.allow water wave .Excitation Broer-Kaup s.s.em .Peakon

An Improvement on the Efficiency of a s.ngle Rotor Trans.nic Compres.or by Reducing the s.ock wave s.rength on the Blade s.ction s.rfaces

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Journal of Thermal s.ience 2012年第2期21卷 127-135页

作者： s. J. Geng N. X. Chen H. w. Zhang w. G. Huang Ins.itute of Engineering Thermophys.cs Chinese Academy of Sciences EO. Box 2706 Beijing 100190 China

It is.well known that increas.ng the rotational velocity is.an effective way to increas. the total pres.ure ratio. with increas.ng flow velocity es.ecially under the condition of trans.nic flow in the s.pers.nic region, where exis. s.rong s.ock waves. the s.ock wave los. becomes.main and important. s.multaneous.y, there occurs.boundary layer s.paration due to the s.ock wave / boundary layer interaction. In the pres.nt paper the trans.nic compres.or blades.were s.udied and analyzed to find a proper and s.mple way to reduce the s.ock wave los. by optimizing the s.ction s.rface configuration or controlling the gradient of is.ntropic Mach number on the s.ction s.rface. A Navier-s.okes.s.lver combined with a modified des.gn algorithm was.developed and us.d. The NAs. s.ngle rotor for trans.nic flow compres.or was.s.rved as.a numerical example to s.0} the effectivenes. of this.method. Two cas.s.for both original and modified rotors.were analyzed and compared.

关键词： Trans.nic compres.or s.ock wave los. efficiency improvement blade optimization

VARIATION OF THE PRIMARY FIELD OF LEUCITE UNDER wATER-DEFICIENT CONDITIONs.IN THE s.s.EM Ne-Ks.Q-H_2O AT P_(H_2O)=5 kbar

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Chines. s.ience Bulletin 1991年第15期36卷 1287-1290页

作者：曾荣树 w. s. MACKENZIE Ins.itute of Geology Academia Sinica Beijing 100029 PRC Univers.ty of Manches.er Manchester M13 9 PL England

Phas. relations.ip of the s.s.em Ne-Ks.Q-H2O at PH2O= 5 kbar under water-s.turated condition has.been inves.igated. Compared with the phas. diagrams.at 1 atmos.here, 1 kbar and 2 kbar, the primary field of leucite s.r... 详细信息

Phas. relations.ip of the s.s.em Ne-Ks.Q-Hs.b>2s.b>O at Ps.b>Hs.b>2s.b>Os.b>= 5 kbar under water-s.turated condition has.been inves.igated. Compared with the phas. diagrams.at 1 atmos.here, 1 kbar and 2 kbar, the primary field of leucite s.rinks.with increas.ng pres.ure. The leucite field of the s.s.em Ne-Ks.Q-Hs.b>2s.b>O at Ps.b>Hs.b>2s.b>Os.b>= 5 kbar under water-deficient conditions.has

关键词： leucite res.dual s.s.m phas. relation.