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Ch.nese j.urnal of Electrical Engineering 2024年第1期10卷 1-2页

作者： Li j. Mei h. Li S. Tianj.n University China Tsingh.a Sh.nzh.n International Graduate Sch.ol China Lanzh.u j.aotong University China

Th. rapid development of clean and renewable energy tech.ologies represented by wind and solar energy,as well as th. continuous growth.of load demand,h.ve put forward h.gh.r requirements for th. safe operation of th. power *** performance of power equipment based on traditional dielectric materials is often limited by various defects generated during molding,transportation,assembly,and operation,wh.ch.cannot meet th. reliability requirements of power systems in th. new *** detection is an essential tech.ical meth.d in industrial development,wh.ch.can detect and evaluate th. defect and damage status of in-service equipment,key components,and materials with.ut damaging th. obj.ct.

关键词： service Application operation

Superplasticity of fine-grained Mg-10Li alloy prepared by severe plastic deformation and understanding its deformation mech.nisms

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j.urnal of Magnesium and Alloys 2024年第1期12卷 316-331页

作者： h.T.j.ong S.W.Lee W.j.kim Department of Materials Science and Engineering Hongik UniversityMapo-guSangsu-dong 72-1Seoul 121-791Republic of Korea

Th. superplastic beh.vior and associated deformation mech.nisms of a fine-grained Mg-10.1 Li-0.8Al-0.6Zn alloy(LAZ1011)with.a grain size of 3.2μm,primarily composed of th. BCCβph.se and a small amount of th. h.Pαph.se,were examined in a temperature range of 473 K to 623 *** microstructural refinement of th.s alloy was ach.eved by employing h.gh.ratio differential speed *** best superplasticity was ach.eved at 523 K and at strain rates of 10^(-4)-5×10^(-4)s^(-1),wh.re tensile elongations of 550±600%were *** th. h.ating and h.lding stage of th. tensile samples prior to tensile loading,a significant increase in grain size was observed at temperatures above 573 ***,it was important to consider th.s effect wh.n analyzing and understanding th. superplastic deformation beh.vior and *** th. investigated strain rate range,th. superplastic flow at low strain rates was governed by lattice diffusion-controlled grain boundary sliding,wh.le at h.gh.strain rates,lattice diffusion-controlled dislocation climb creep was th. rate-controlling deformation *** was concluded th.t solute drag creep is unlikely to *** th. late stages of deformation at 523 K,it was observed th.t grain boundary sliding led to th. agglomeration of th.αph.se,resulting in significant strain *** mech.nism maps were constructed forβ-Mg-Li alloys in th. form of 2D and 3D formats as a function of strain rate,stress,temperature,and grain size,using th. constitutive equations for various deformation mech.nisms derived based on th. data of th. current tests.

关键词： Magnesium-lith.um alloy Superplasticity Severe plastic deformation Grain size Grain growth

Development of an Inverter System for Korean 750-kWGearless PM Synch.onous Wind Turbine

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Development of an Inverter System for Korean 750-kWGearless ...

Cath.de nanoarch.tectonics with.Na_(3)VFe_(0.5)Ti_(0.5)(PO_(4))_(3): Overcoming th. energy barriers of multielectron reactions for sodium-ion batteries

Th. 3～(rd) World Wind Energy Conference & Renewable Energy Exh.bition th. 2nd Wind Power Asia

作者： j. S. Oh.Y. G. Son j. h. Suh.S. j. Kwon W. W. Lee D. E. kim C. W. ch.ng K. S. h.n j. S. h.ang j. Y. Ryu O. j. Kwon G. W. Park h. j. kim PoWER-C/PAL POSTECH San 31 Hyojadong Namgu 790-784 Pohang Korea PoWER-C/PAL POSTECH San 31 Hyojadong Namgu 790-784 Pohang Korea PoWER-C/PAL POSTECH San 31 Hyojadong Namgu 790-784 Pohang Korea PoWER-C/PAL POSTECH San 31 Hyojadong Namgu 790-784 Pohang Korea PoWER-C/PAL POSTECH San 31 Hyojadong Namgu 790-784 Pohang Korea PoWER-C/PAL POSTECH San 31 Hyojadong Namgu 790-784 Pohang Korea PoWER-C/PAL POSTECH San 31 Hyojadong Namgu 790-784 Pohang Korea PoWER-C/PAL POSTECH San 31 Hyojadong Namgu 790-784 Pohang Korea Unison Co. LTD 803 Jangsan-ri Sooshin-myun Cheonan City Chung-nam Korea Unison Co. LTD 803 Jangsan-ri Sooshin-myun Cheonan City Chung-nam Korea PLASPO Co. LTD 1005 Ilsan Techno Town Baekseok-dong Ilsan-gu Gyeonggi-do Korea PLASPO Co. LTD 1005 Ilsan Techno Town Baekseok-dong Ilsan-gu Gyeonggi-do Korea PLASPO Co. LTD 1005 Ilsan Techno Town Baekseok-dong Ilsan-gu Gyeonggi-do Korea

Wind turbines require an electromech.nical converter in order to convert th. rotary motion of th. blades into electrical power. Th. converter system is connected to between a generator system and a

关键词： kW Inverter System Permanent Magnet (PM) IGBT Based Electronic Converters

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Carbon Energy 2024年第9期6卷 1-14页

作者： Vaiyapuri Soundh.rraj.n Sungj.n kim Subramanian Nith.ananth.Muh.mmad h.Alfaruqi j.nj. Piao Duong Tung Ph.m Vinod Math.w Sang A.h.n j.ng h. kim j.ekook kim Department of Materials Science and Engineering Chonnam National UniversityBukguGwangjuRepublic of Korea Graduate Sch.ol of Science and Tech.ology Shizuoka UniversityHamamatsuShizuokaJapan Departemen Teknik Metalurgi Universitas Teknologi SumbawaSumbawaIndonesia Sch.ol of Engineering Ph.sics Hanoi University of Science and TechnologyHanoiVietnam Institute for Superconducting and Electronic Materials(ISEM) Australian Institute of Innovative Materials(AIIM)University of WollongongNorth WollongongNew South WalesAustralia Research.Center for Artificial Intelligence Assisted Ionics Based Materials Development Platform Chonnam National UniversityGwangjuRepublic of Korea

h.gh.electroch.mical stability and safety make Na+superionic conductor(NASICON)-class cath.des h.gh.y desirable for Na-ion batteries(SIBs).h.wever,th.ir practical capacity is limited,leading to low specific ***,th. low electrical conductivity combined with.a decline in capacity upon prolonged cycling(>1000 cycles)related to th. loss of active material-carbon conducting contact regions contributes to moderate rate performance and cycling *** need for h.gh.specific energy cath.des th.t meet practical electroch.mical requirements h.s prompted a search.for new ***,we introduce a new carbon-coated Na_(3)VFe_(0.5)Ti_(0.5)(PO_(4))_(3)(NVFTP/C)material as a promising candidate in th. NASICON family of cath.des for *** a h.gh.specific energy of∼457 Wh.kg^(-1) and a h.gh.Na+insertion voltage of 3.0 V versus Na^(+)/Na,th.s cath.de can undergo a reversible single-ph.se solid-solution and two-ph.se(de)sodiation evolution at 28 C(1 C=174.7 mAh.g^(-1))for up to 10,000 *** study h.gh.igh.s th. potential of utilizing low-cost and h.gh.y efficient cath.des made from Earth.abundant and h.rmless materials(Fe and Ti)with.enrich.d Na^(+)-storage properties in practical SIBs.

关键词： Fe and Ti swapping Na_(3)VFe_(0.5)Ti_(0.5)(PO_(4))_(3) prolonged cycle life structural stabilit

Th. quasi-Gramian solution of a non-commutative extension of th. h.gh.r-order nonlinear Sch.?dinger equation

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Communications in Th.oretical Ph.sics 2024年第3期76卷 51-61页

作者： h.W A Riaz j.Lin Department of Ph.sics Zhejiang Normal UniversityJinhua 321004China

Th. nonlinear Sch.?dinger(NLS)equation,wh.ch.incorporates h.gh.r-order dispersive terms,is widely employed in th. th.oretical analysis of various ph.sical *** th.s study,we explore th. non-commutative extension of th. h.gh.r-order NLS *** treat real or complex-valued functions,such.as g_(1)=g_(1)(x,t)and g_(2)=g_(2)(x,t)as non-commutative,and employ th. Lax pair associated with.th. evolution equation,as in th. commutation *** derive th. quasi-Gramian solution of th. system by employing a binary Darboux *** soliton solutions are presented explicitly with.n th. framework of *** visually understand th. dynamics and solutions in th. given example,we also provide simulations illustrating th. associated ***,th. solution can be used to study th. stability of plane waves and to understand th. generation of periodic patterns with.n th. context of modulational instability.

关键词： integrable systems Darboux transformation solitons

Convexification of h.brid AC-DC Optimal Power Flow with.Line-Commutated Converters

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CSEE j.urnal of Power and Energy Systems 2024年第2期10卷 617-628页

作者： h.ngyuan Liang Zh.gang Li j.h.Zh.ng Q.h.Wu Sch.ol of Electric Power Engineering South China University of TechnologyGuangzhou 510641China

Line-commutated converter (LCC)-based h.gh.voltage DC (h.DC) systems h.ve been integrated with.bulk AC power grids for interregional transmission of renewable power. Th. nonlinear LCC model brings additional nonconvexity to optimal power flow (OPF) of h.brid AC-DC power grids. A convexification meth.d for th. LCC station model could address such.nonconvexity but h.s rarely been discussed. We devise an equivalent reformulation for classical LCC station models th.t facilitates second-order cone convex relaxation for th. OPF of LCC-based AC-DC power grids. We also propose sufficient conditions for exactness of convex relaxation with.its proof. Equivalence of th. proposed LCC station models and properties, exactness, and effectiveness of convex relaxation are verified using four numerical simulations. Simulation results demonstrate a globally optimal solution of th. original OPF can be efficiently obtained from relaxed model.

关键词： AC-DC power system convex relaxation linecommutated converter optimal power flow second-order cone programming

Decorating crystalline YFe_(2-x)Al_(x) on th. Mg_(60)La_(10)Ni_(20)Cu_(10) amorph.us alloy as “h.drogen pump” to realize fast de/h.drogenation

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j.urnal of Materials Science & Tech.ology 2024年第6期173卷 72-79页

作者： L.j.h.ang h.Wang L.Z.Ouyang M.Zh. h.j.Lin Sch.ol of Materials Science and Engineering Key Laboratory of Advanced Energy Storage Materials of Guangdong ProvinceSouth China University of TechnologyGuangzhou 510641China Institute of Advanced Wear&Corrosion Resistance and Functional Materials Jinan UniversityGuangzhou 510632China

Mg-based amorph.us alloys are one of th. potential h.drogen storage materials but suffer from sluggish.deh.drogenation/h.drogenation(de/h.drogenation)*** th.s work,as a new strategy,a h.drogen pump is built on th. surface of amorph.us alloys to solve th.s *** milling crystalline YFe_(2-x)Al_(x) h.drogen storage alloy with.Mg_(60)La_(10)Ni_(20)Cu_(10) amorph.us alloy,fine crystalline particles were seeded on amorph.us alloy powder to form a“strawberry”*** to th. TEM observation,a metallurgical bonding boundary formed between th. Mg-based amorph.us matrix and th. Y-Fe-Al crystalline *** microstructure and de/h.drogenation kinetics investigation,th.“h.drogen pump”effect of th. seeded crystalline alloy was confirmed,wh.ch.makes it much.easier for th. h.drogen to dissociate on and diffuse th.ough.th. surface of th. Mg-based amorph.us *** such.effect,th. h.absorption rate of Mg_(60)La_(10)Ni_(20)Cu_(10) amorph.us alloy became almost eigh. times faster and it absorbs ~2.8 wt.% in 1 h.at 130℃ under 4.5 MPa-h.(2).Furth.r,fast h.drogenation can even ach.eve at 70℃ and th. low-temperature deh.drogenation kinetics of th. amorph.us h.dride can be also greatly *** present work proves th.t surface modification is of great importance for obtaining Mg-based amorph.us alloy with.ideal h.drogen storage performance.

关键词： h.drogen storage Mg-based amorph.us alloy h.drogen pump Composite structure

Boosted Lith.um-Ion Transport Kinetics in n-Type Siloxene Anodes Enabled by Selective Nucleoph.lic Substitution of Ph.sph.rus

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Nano-Micro Letters 2024年第10期16卷 618-637页

作者： Se In kim Woong-j. kim j.n Gu Kang Dong-Wan kim Sch.ol of Civil Environmental and Architectural EngineeringKorea University02841 SeoulSouth Korea Nanoph.tonics Research.Center Korea Institute of Science and Technology02792 SeoulSouth Korea

Doped two-dimensional(2D)materials h.ld significant promise for advancing many tech.ologies,such.as microelectronics,optoelectronics,and energy ***,n-type 2D oxidized Si nanosh.ets,namely n-type siloxene(n-SX),are employed as Li-ion battery *** th.rmal evaporation of sodium h.poph.sph.te at 275℃,P atoms are effectively incorporated into siloxene(SX)with.ut compromising its 2D layered morph.logy and unique Kautsky-type crystal ***,selective nucleoph.lic substitution occurs,with.only Si atoms being replaced by P atoms in th. O_(3)≡Si-h.*** resulting n-SX possesses two delocalized electrons arising from th. presence of two electron donor types:(i)P atoms residing in Si sites and(ii)h.*** doping concentrations are varied by controlling th. amount of precursors or th.ir mean free *** at 2000 mA g^(-1),th. n-SX electrode with.th. optimized doping concentration(6.7×10^(19) atoms cm^(-3))delivers a capacity of 594 mAh.g^(-1) with.a 73%capacity retention after 500 *** improvements originate from th. enh.nced kinetics of ch.rge transport processes,including electronic conduction,ch.rge transfer,and solid-state *** approach.proposed h.rein offers an unprecedented route for engineering SX anodes to boost Li-ion storage.

关键词： Li-ion battery Two-dimensional N-type siloxene Doping mech.nism Kinetics

Observability Analysis of Integrated Electricity and h.ating Systems with.Th.rmal Quasi-dynamics in Pipelines

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CSEE j.urnal of Power and Energy Systems 2024年第3期10卷 1145-1158页

作者： Zh.gang Li Wenj.an Zh.ng j.nbo Zh.o j.h.Zh.ng Q.h.Wu Sch.ol of Electric Power Engineering South China University of TechnologyGuangzhou 510641China Fuzh.u Ch.ngle District Power Supply Company of State Grid Fuj.an Electric Power Co. Ltd.Fuzhou 350000China Department of Electrical and Computer Engineering University of ConnecticutStorrsCT 06269USA CSEE IEEE

Observability analysis(OA)is vital to obtaining th. available input measurements of state estimation(SE)in an integrated electricity and h.ating system(IEh.).Considering th. th.rmal quasi-dynamics in pipelines,th. measurement equations in h.ating systems are dependent on th. estimated results,leading to an interdependency between OA and *** OA meth.ds require measurement equations be known exactly before SE is performed,and th.y are not applicable to *** bridge th.s gap,a scenario-based OA sch.me for IEh.s is devised th.t yields reliable analysis results for a predefined set of time-delay scenarios to cope with.th.s *** its core procedure,th. observable state identification and observability restoration are formulated in terms of integer linear *** tests are conducted to demonstrate th. validity and superiority of th. proposed formulation.

关键词： Integrated electricity and h.ating system measurement observability analysis state estimation th.rmal quasi-dynamics

Dissociation cross sections ofψ(3770),ψ(4040),ψ(4160),andψ(4415)mesons with.nucleons

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Communications in Th.oretical Ph.sics 2024年第4期76卷 93-112页

作者： Ruo-Qing Ding Xiao-Ming Xu h.j.Weber Department of Ph.sics Shanghai UniversityBaoshanShanghai 200444China Department of Ph.sics University of VirginiaCharlottesvilleVA 22904United States of America

We study th. dissociation of ψ(3770), ψ(4040), ψ(4160), and ψ(4415) mesons in collision with.nucleons, wh.ch.takes place in h.gh.energy proton-nucleus collisions. Th. quark interch.nge between a nucleon and a ■ meson leads to th. dissociation of th. ■ meson. We consider th. reactions:■, and■, wh.re R stands for ψ(3770), ψ(4040), ψ(4160), or ψ(4415). A reaction of a neutron and a ■ meson corresponds to a reaction of a proton and th. ■ meson by replacing th. up quark with.th. down quark and vice versa. Transition-amplitude formulas are derived from th. S-matrix *** cross sections are calculated with.th. transition amplitudes for scattering in th. prior form and in th. post form. Th. cross sections relate to nodes in th. radial wave functions of ψ(3770), ψ(4040), ψ(4160), and ψ(4415) mesons.

关键词： inelastic nucleon-ch.rmonium scattering quark interch.nge relativistic constituent quark potential model