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Synthesis of flexible heat exchang.r networks:A review

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Chinese Journal of Chem.cal Eng.neering 2019年第7期27卷 1485-1497页

作者： Lixia kang Yong.hong.Liu Departm.nt of Chem.cal Eng.neering Xi’an Jiaotong UniversityXi’an 710049China Key Laboratory of Therm.-Fluid Science and Eng.neering Ministry of EducationXi’an 710049China

Dealing.with uncertainty is one of practical issues in desig. and operation of heat exchang.r networks(HENs),arising.the problem.of flexible HEN *** paper addresses the state-of-the-art m.thods for flexible HEN synthesis based on sensitivity analysis,resilience analysis,flexibility analysis and m.ltiperiod synthesis techniques as *** of these m.thods is sum.arized by presenting.their g.neral procedures and recent developm.nts on m.deling.solving.strateg.es and *** current topics related to flexible process synthesis have been briefly presented to provide several future research possibilities.

关键词： Heat exchang.r network Sensitivity analysis Resilience analysis Flexibility analysis m.ltiperiod synthesis

Param.ter estim.tion for rig.d body after m.cro-Doppler rem.val based on L-statistics in the radar analysis

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Journal of System. Eng.neering.and Electronics 2015年第3期26卷 457-467页

作者： Yong.Wang.Jian kang School of Electronics and Inform.tion Eng.neering Harbin Institute of Technology

In traditional inverse synthetic aperture radar （ISAR） im.g.ng.of m.ving.targ.ts with rotational parts, the m.cro-Doppler （m.D） effects caused by the rotational parts influence the quality of the radar im.g.s. Recently, L. Stankovic proposed an m.D rem.val m.thod based on L-statistics, which has been proved effective and sim.le. The alg.rithm.can extract the m.D effects according.to different behaviors of sig.als induced by rotational parts and rig.d bodies in tim.-frequency （T-F） dom.in. However, by rem.ving.m.D effects, som. useful short tim. Fourier transform.（STFT） sam.les of rig.d bodies are also extracted, which induces the side lobe problem.of rig.d bodies. A param.ter estim.tion m.thod for rig.d bodies after m.D rem.val is proposed, which can accurately re- cover rig.d bodies and avoid the side lobe problem.by only using.m.D rem.val. Sim.lations are g.ven to validate the effectiveness of the proposed m.thod.

关键词： param.ter estim.tion L-statistics m.cro-Doppler (m.D) radar im.g.ng.

Ultra-thin vertical tft photosensor and photosynapse based on au-doped-g.aphene under transition m.tal selenide reaction

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Journal of m.terials Science & Technolog. 2024年第16期183卷 215-222页

作者： Ting.kang Adila Rani Wanqi Ren m.Junaid Sultan Nae-Eung.Lee Tae g.un Kim School of Electrical Eng.neering Korea UniversitySeoul 02841South Korea School of Advanced m.terials Science&Eng.neering Sungkyunkwan UniversityGyeonggi-do 16419South Korea

The developm.nt of artificial photosensitive synapses with hig. sensitivity and biom.m.tic properties that com.ine innovative concepts and neurom.rphic architectures is crucial to achieving.hig.ly integ.ated and flexible intellig.nt visual ***,g.aphene heterostructure-based photosensitive synaptic transistors have been extensively studied for this ***,com.ared to traditional transistors,vertical structure thin film.transistors(VTFTs)with ultra-short channels and advantag.s,such as hig. integ.ation,have yet to be investig.ted in photosensitive ***,we report an ultra-thin VTFT featuring.a g.aphene/W_(x)Se_(x-1)van der Waals heterostructure that com.ines photonic and neurom.rphic *** dem.nstrate a VTFT in which the channel layer is form.d by covalently bonded W_(x)Se_(x-1)nanom.terials produced by introducing.Se atom. on the surface of a tung.ten m.tal thin film.deposited via radio-frequency *** structure successfully sim.lated the m.in synaptic function,exhib-ited photosensitive synaptic responses to ultraviolet(λ=365 nm.lig.t,and dem.nstrated hig.ly reliable electrical ***,the incorporation of g.ld nanoparticles chang.d the photosensitive synaptic response properties of the g.aphene/W_(x)Se_(x-1)heterostructure from.excitatory to inhibitory,show-ing.a responsivity of about∼14 A W-1,which was attributed to the heterojunction interface resonant effects and efficient charg. transfer induced by localized surface *** further enabled optical artificial synaptic applications while operating.with low voltag. spikes and low lig.t *** work provides a novel strateg. for integ.ating.and developing.biolog.cal and nano-electronic system..

关键词： Ultra-thin Vertical TFT Au nanoparticles Photo sensor Photo responsivity Photo synapse

Inertial PLL of g.id-connected Converter for Fast Frequency Support

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CSEE Journal of Power and Energ. System. 2023年第4期9卷 1594-1599页

作者： Xiang.g.o Dong.ai Zhu Jiabing.Hu Xudong.Zou Yong.kang Josep m.g.errero State Key Laboratory of Advanced Electrom.g.etic Eng.neering.and Technolog. School of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074China. Departm.nt of Energ. Technolog. Aalborg UniversityAalborg 9220Denmark

Frequency support capability for the g.id-connected converter(g.C)is one of the basic safeg.ards for the stability of renewables-dom.nated power *** this paper,analog.us to the m.tion equation of a synchronous g.nerator(Sg.,an inertial phase-locked loop(iPLL)is proposed for g.C to achieve fast frequency *** iPLL introduces the inertial and dam.ing.loops into the classic PLL structure to em.late the natural frequency reg.lation characteristics of a *** with the existing.m.thods,the iPLL has a faster frequency response and is sim.ler in desig. and ***,the proposed iPLL m.thod is validated by *** Term.-Frequency support,g.id-connected converter,inertial phase-locked loop(iPLL),synchronous g.neration(Sg..

关键词： Frequency support g.id-connected converter inertial phase-locked loop(iPLL) synchronous g.neration(Sg..

Effect of Ni Content on m.chanical Properties and Corrosion Behavior of Al/Sn－9Zn－xNi/Cu Joints

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Journal of m.terials Science & Technolog. 2012年第9期28卷 844-852页

作者： m.L.Huang.N.kang Q.Zhou Y.Z.Huang Key Laboratory of Liaoning.Advanced Welding.and Joining.Technolog. School of Materials Science&EngineeringDMian University of TechnologyDalian 116024China

The effects of Ni content on the m.crostructure and the wetting.behavior of Sn-9Zn-xNi solders on Al and Cu substrates, as well as the m.chanical properties and electrochem.cal corrosion behavior of Al/Sn-9Zn-xNi/Cu solder joints, were investig.ted. The m.crostructure of Sn-g.n-xNi revealed that tiny Zn and coarsened Ni5Zn21 phases dispersed in theβ-Sn m.trix. The wettability of Sn-9Zn-xNi solders on Al substrate was m.ch better than that on Cu substrate. With increasing.Ni content, the wettability on Cu substrate was slig.tly im.roved but becam. worse on Al substrate. In the Al/Sn-9Zn-xNi/Cu joints, an Al4.2Cu3.2Zn0.7 interm.tallic com.ound （Im.） layer form.d at the Sn-g.n-xNi/Cu interfaces, while an Al-Zn-Sn solid solution layer form.d at the Sn-9Zn-xNi/Al interface. The m.xed com.ounds of Ni3Sna and Al3Ni dispersed in the solder m.trix and coarsened with increasing.Ni content, thus leading.to a reduction in shear streng.h of the Al/Sn-9Zn- xNi/Cu joints. Al particles were seg.eg.ted at both interfaces in the solder joints. The corrosion potentials of Sn-9Zn-xNi solders continuously increased with increasing.Ni content. The Al/Sn-9Zn-0.25Ni/Cu joint was found to have the best electrochem.cal corrosion resistance in 5% NaCl solution.

关键词： Al-Cu disslm.lar-m.tal solder joint Sn-9Zn-xNi m.crostructure m.chanicalproperties Electrochem.cal corrosion Corrosion potential

Transient Characteristics and Quantitative Analysis of Electrom.tive Force for DFIg.based Wind Turbines during.g.id Faults

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Chinese Journal of Electrical Eng.neering 2022年第2期8卷 3-12页

作者： Yum.i m. Dong.ai Zhu Xudong.Zou Yong.kang Josep m.g.errero Key Laboratory of Power Electronics and Energ. m.nag.m.nt for m.nistry of Education of China Huazhong University of Science and TechnologyWuhan 430074China Departm.nt of Energ. Technolog. Aalborg UniversityAalborg 9220Denmark

For doubly-fed induction g.nerator(DFIg.-based wind turbines(WTs),various advanced control schem.s have been proposed to achieve the low voltag. ride throug.(LVRT)capability,whose param.ters desig. is sig.ificantly reliant on the rotor electrom.tive force(Em.)of DFIg.based ***,the influence of the rotor current on Em. is usually ig.ored in existing.studies,which cannot fully reflect the transient characteristics of *** tackle with this issue,this study presents a com.rehensive and quantitative analysis of Em. during.g.id faults considering.various control ***,the DFIg.m.del under g.id faults is ***,the transient characteristics of Em. are analyzed under different control m.des(that is,rotor open-circuit and connected to converter).Furtherm.re,the Em. transient eig.nvolum.s(that is,accessorial resistance item.transient decay tim. constant,and frequency offset)are quantitatively analyzed with the typical param.ters of m.-level DFIg.based *** analysis results contribute to the desig. of the LVRT control ***,the analysis is validated by the hardware-in-the-loop experim.nts.

关键词： Doubly-fed induction g.nerator(DFIg. electrom.tive force(Em.) quantitative analysis transient characteristics wind turbines(WTs) g.id faults

m.lecular dynam.cs sim.lations of CH4 diffusion in kaolinite: influence of water content

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International Journal of Coal Science & Technolog. 2019年第4期6卷 556-563页

作者： Bin Zhang.Jianting.kang Tianhe kang g.anxian kang g.ofei Zhao Key Laboratory of In-situ Property-Im.roving.m.ning.of m.nistry of Education Taiyuan University of TechnologyTaiyuan 030024People's Republic of China Colleg. of Safety and Em.rg.ncy m.nag.m.nt Eng.neering Taiyuan University of TechnologyTaiyuan 030024People's Republic of China Shanxi Institute of Energ. Jinzhong 030600People's Republic of China

Understanding.the interaction of CH4 with kaolinite is sig.ificant for researchers in the fields of coalbed CH4 and shale *** diffusion behaviors of CH4 in kaolinite with water contents rang.ng.from.0 to 5 wt% have been analyzed by m.lecular dynam.cs *** results of the sim.lations indicate that CH4 m.lecules can jum. between adjacent holes in the kaolinite ***4 diffusion coefficient was very low (3.28 × 10-9 m./s) and increased linearly with the increasing.of water *** the water content decreased,the value of radial distribution function first peak between CH4 and oxyg.n was larg.r,m.aning.that with lower water content,the interaction energ. between CH4 and oxyg.n in kaolinite is *** interaction between CH4 and water is linearly positively correlated with water content,in contrast,the interaction energ. between kaolinite and water as well as between kaolinite and CH4 decreased linearly with increasing.water *** the other hand,the diffusion of CH4 m.lecules adsorbed on the surfaces also can be accelerated by the fast diffusion of water m.lecules in the m.ddle m.cropore of the kaolinite.

关键词： m.lecular dynam.cs Kaolinite Water content Diffusion Interaction energ.

Im.g. RESTOR ATION UNDER CAUCHY NOISE WITH SPA RSE REPR ESENTATION PRIOR AND TOTAL g.NER ALIZED VA RIATION

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Journal of Com.utational m.them.tics 2021年第1期39卷 81-107页

作者： m.youn Jung.m.ung.oo kang Departm.nt of m.them.tics Hankuk University of Foreign StudiesYonginKorea Departm.nt of m.them.tical Sciences Seoul National UniversitySeoulKorea

This article introduces a novel variational m.del for restoring.im.g.s deg.aded by Cauchy noise and/or *** m.del integ.ates a nonconvex data-fidelity term.with two reg.larization term.,a sparse representation prior over dictionary learning.and total g.neralized variation(Tg.)*** sparse representation prior exploiting.patch inform.tion enables the preservation of fine features and textural patterns,while adequately denoising.in hom.g.neous reg.ons and contributing.natural visual *** reg.larization further assists in effectively denoising.in sm.oth reg.ons while retaining.*** adopting.the penalty m.thod and an alternating.m.nim.zation approach,we present an efficient iterative alg.rithm.to solve the proposed *** results establish the superiority of the proposed m.del over other existing.m.dels in reg.rd to visual quality and certain im.g. quality assessm.nts.

关键词： Im.g. restoration Cauchy noise Sparse representation prior Dictionary learn-ing Total g.neralized variation.

Effect of Injection Velocity on Structure Part Characteristic in A50 Die Casting.Process with Hig. Vacuum.System

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Journal of m.terials Science & Technolog. 2008年第1期24卷 75-79页

作者： S.m.Lee P.K.Seo C.g.kang School of m.chanical Eng.neering Pusan National University Busan 609-735 Korea

When diecasting.larg. and thin m.0}alloy parts,m.terial defects occur,which include porosity,nonuniform.m.chanical properties,irreg.lar surfaces,and incom.lete *** resolve these problem.,it is necessary to have uniform.injection velocities and tem.eratures as well as control the *** study investig.ted the feasibility of producing.larg. and thin com.onents using.a die caster by attaching.a hig. vacuum.*** particular,the effects of injection velocity on surface quality and the m.chanical properties of the products were ***,an injection velocity schem. and a die structure capable of casting.in a vacuum.were *** a result,it was found that the critical low injection velocity was 0.2 m.s to produce larg. thin m.0}alloy structures having.g.od m.chanical properties.

关键词： m.0}die casting Injection velocity Vacuum.system