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Kinetic theory of geodesic acoustic modes in toroidal plasmas:a brief review

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Plasma Science and Technology 2018年第9期20卷 24-49页

作者： zhiyong qiu Liu CHEN Fulvio ZONCA Institute for Fusion Theory and Simulation and Department of Physics Zhejiang University Department of Physics and Astronomy University of California ENEA Fusion and Nuclear Safety Department

Geodesic acoustic modes（GAM） are oscillating zonal structures unique to toroidal plasmas,and have been extensively studied in the past decades due to their potential capabilities of regulating microscopic turbulences and associated anomalous *** article reviews linear and nonlinear theories of GAM;with emphases on kinetic treatment,system nonuniformity and realistic magnetic geometry,in order to reflect the realistic experimental ***,in the linear physics,the resonant wave-particle interactions are discussed,with the application to resonant excitation by energetic particles（EPs）.The theory of EP-induced GAM（EGAM） is applied to realistic devices for the interpretation of experimental observations,and global effects due to coupling to GAM continuum are also ***,in the nonlinear physics,the spontaneous GAM excitation by microscale turbulences is reviewed,including the effects of various system nonuniformities.A unified theoretical framework of GAM/EGAM is then constructed based on our present *** first-principle-based GAM/EGAM theories reviewed here,thus,provide the tools needed for the understanding and interpretation of experimental/numerical results.

关键词： geodesic acoustic mode kinetic theory nonlinear physics energetic particle physics

Kinetic Theories of Geodesic Acoustic Modes：Radial Structure,Linear Excitation by Energetic Particles and Nonlinear Saturation＇

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Plasma Science and Technology 2011年第3期13卷 257-266页

作者： qiu zhiyong(仇志勇) Fulvio ZONCA CHEN Liu(陈骝) Institute for Fusion Theory and Simulation Zhejiang UniversityHangzhou 310027China Associazione Euratom=ENEA sulla Fusione C. P. 65 -I-00044-Frascati. Italy Dept. of Physics and Astronomy Univ. of California Irvine CA 92697-4575 USA

Geodesic acoustic modes（GAMs）are oscillating zonal mode structures unique to toroidal plasmas and are capable of regulating microscopic turbulence and associated ***,three important aspects of GAM dynamics are investigated,namely（1） GAM continuous spectrum and its mode conversion to kinetic GAM （KGAM）;（2） 1inear excitation of energetic particle induced GAM （EGAM） and its coupling to the GAM continuum, and （3） nonlinear ***

关键词： geodesic acoustic mode continuum energetic particles wave particle trapping

Photoexcitation induced magnetic phase transition and spin dynamics in antiferromagnetic MnPS_(3) monolayer

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npj Computational Materials 2023年第1期9卷 1246-1252页

作者： Yinlu Gao Xue Jiang zhiyong qiu Jijun Zhao State Key Laboratory of Structural Analysis for Industrial Equipment Dalian University of Technology116024 DalianChina Key Laboratory of Materials Modification by Laser Ion and Electron Beams(Dalian University of Technology)Ministry of Education116024 DalianChina Key Laboratory of Energy Materials and Devices(Liaoning Province) School of Materials Science and EngineeringDalian University of Technology116024 DalianChina

Antiferromagnetic spin dynamics is the key issue to develop spintronic *** adopt ab initio nonadiabatic molecular dynamics with spin–orbit-coupling(SOC)to investigate photoinduced spin dynamics in an antiferromagnetic semiconductor MnPS_(3) *** doping triggers MnPS_(3) from Néel antiferromagnetic to ferromagnetic phase at an experimentally achievable electron–hole pair density of 1.11×10^(14) cm−*** phase transition can be ascribed to the light-induced mid-gap states of S-p orbitals,which lower the electron excitation energy and strengthen the SOC effect between S-p and Mn-d *** excited S-p electrons first decay to the mid-gap states due to p–p electron–phonon-coupling and then relax to the spin-down Mn-d orbitals via *** a dramatic relaxation process prolongs the photogenerated carrier lifetime up to 648 fs,providing an explanation for the unusual optoelectronic performance of MnPS_(3).The reversible switching of magnetic order via optical means gives an important clue for information storage and highly efficient photocatalysts utilizing antiferromagnetic semiconductors.

关键词： dynamics excitation monolayer

Nonlinear Coupling of Reversed Shear Alfvén Eigenmode and Toroidal Alfvén Eigenmode during Current Ramp

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Chinese Physics Letters 2021年第3期38卷 50-54页

作者： Shizhao Wei Yahui Wang Peiwan Shi Wei Chen Ningfei Chen zhiyong qiu Institute for Fusion Theory and Simulation and Department of Physics Zhejiang UniversityHangzhou 310027China Southwestern Institute of Physics P.O.Box 432Chengdu 610041China Key Laboratory of Materials Modification by Laser Ionand Electron Beams(Ministry of Education)School of PhysicsDalian University of TechnologyDalian 116024China

Two novel nonlinear mode coupling processes for reversed shear Alfvén eigenmode(RSAE) nonlinear saturation are proposed and investigated. In the first process, the RSAE nonlinearly couples to a co-propagating toroidal Alfvén eigenmode(TAE) with the same toroidal and poloidal mode numbers, and generates a geodesic acoustic mode. In the second process, the RSAE couples to a counter-propagating TAE and generates an ion acoustic wave quasi-mode. The condition for the two processes to occur is favored during current ramp. Both the processes contribute to effectively saturate the Alfvénic instabilities, as well as nonlinearly transfer of energy from energetic fusion alpha particles to fuel ions in burning plasmas.

关键词： mode nonlinear reversed

Nonlinear excitation of a geodesic acoustic mode by reversed shear Alfvén eignemodes

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Plasma Science and Technology 2022年第2期24卷 57-61页

作者： Yahui WANG Tao WANG Shizhao WEI zhiyong qiu Institute for Fusion Theory and Simulation and Department of Physics Zhejiang UniversityHangzhou 310027People's Republic of China Center for Nonlinear Plasma Science and ENEA C.R.Frascati Frascati 65-00044Italy

The parametric decay process of a reversed shear Alfvén eigenmeode(RSAE)into a geodesic acoustic mode and a kinetic RSAE is investigated using nonlinear gyrokinetic *** excitation conditions mainly require the pump RSAE amplitude to exceed a certain threshold,which could be readily satisfied in burning plasmas operated in steady-state advanced *** decay process can contribute to thermal plasma heating and confinement improvement.

关键词： reversed shear Alfvén eigenmode geodesic acoustic mode gyrokinetic theory nonlinear mode coupling burning plasmas alpha channelling

Formation and crystallization behavior of Fe-based amorphous precursors with pre-existingα-Fe nanoparticles-Structure and magnetic properties of high-Cu-content Fe-Si-B-Cu-Nb nanocrystalline alloys

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Journal of Materials Science & Technology 2021年第6期65卷 171-181页

作者： Yanhui Li Xingjie Jia Wei Zhang Yan Zhang Guoqiang Xie zhiyong qiu Junhua Luan Zengbao Jiao Key Laboratory of Materials Modification by Laser Ionand Electron Beams(Ministry of Education)School of Materials Science and EngineeringDalian University of TechnologyDalian 116024China Institute for Materials Research Tohoku UniversitySendai 980-8577Japan School of Materials Science and Engineering Harbin Institute of Technology(Shenzhen)Shenzhen 518055China Center for Advanced Structural Materials Department of Materials Science and EngineeringCity University of Hong KongHong KongChina Department of Mechanical Engineering The Hong Kong Polytechnic UniversityHong KongChina

Structure,crystallization behavior,and magnetic properties of as-quenched and annealed Fe_(81.3)Si_(4)O_(13)Cu_(1.7)(Cu1.7)alloy ribbons and effects of Nb alloying have been ***-dimensional atom probe and transmission electron microscopy analyses reveal that high-number-density Cu-clusters and Pre-existing Nano-sized a-Fe Particles(PN-a-Fe)are coexistence in the melt-spun Cu1.7 amorphous matrix,and the PN-α-Fe form by manners of one-direction adjoining and enveloping the ***-step crystallization behavior associated with growth of the PN-a-Fe and subsequent nucleation and growth of newly-formedα-Fe is found in the primary crystallization stage of the Cu1.7 *** number densities of the Cu-clusters and PN-a-Fe in melt-spun Fe8_(1.3-x)Si_(4)B_(13)Cu_(1.7)Nb_(x)alloys are gradually reduced with enriching of Nb,and a fully amorphous structure forms at 4 at.%Nb,although smaller Cu-clusters still *** annealing,2 at.%Nb coarsens the average size(D_(α-F)e)of theα-Fe grains from 14.0 nm of the Nb-free alloy to 21.6 nm,and 4 at.%Nb refines the D_(α-Fe)to 8.9 *** mechanisms of theα-Fe nucleation and growth during quenching and annealing for the alloys with large quantities of PN-α-Fe as well as after Nb alloying have been discussed,and an annealing-induced oc-Fe growth mechanism in term of the barrier co-contributed by competitive growth among the PN-a-Fe and diffusion-suppression effect of Nb atoms has been proposed.A coercivity(HC)αDα-Fe^(3)correlation has been found for the nanocrystalline alloys,and the permeability is inverse with the H_(C).

关键词： Fe-based nanocrystalline alloy Cu-cluster Pre-existingα-Fe nanoparticle Crystallization behavior Soft magnetic property

Summary of the 10th Conference on Magnetically Confined Fusion Theory and Simulation(CMCFTS)

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Plasma Science and Technology 2023年第8期25卷 1-11页

作者：王志斌仇志勇王璐陈伟 Sino-French Institute of Nuclear Engineering and Technology Sun Yat-sen UniversityZhuhai 519082People's Republic of China Institute for Fusion Theory and Simulation Zhejiang UniversityHangzhou 310027People's Republic of China International Joint Research Laboratory of Magnetic Confinement Fusion and Plasma Physics State Key Laboratory of Advanced Electromagnetic Engineering and TechnologySchool of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074People's Republic of China Southwestern Institute of Physics Chengdu 610041People's Republic of China

This paper gives a summary of the organization and the presentations delivered at the 10th Conference on Magnetically Confined Fusion Theory and Simulation(CMCFTS)held in Zhuhai,China,from 28th to 31st October *** conference focused on the latest progress in the research of the magnetic confined fusion plasma theory and simulations,as well as the largescale numerical simulation techniques developed in recent *** conference is held both online and offline,with about 110 domestic participants from 18 institutes participating in the live conference,and the statistical data from the live broadcast platform indicated that the online conference attracted over 20000 views per day.A summary of the conference is given,and the history of the CMCFTS is presented.A brief introduction to the poster section is also included in this paper.

关键词： CMCFTS magnetically confined fusion theory simulation conference report

Maintainability Analysis of Substation Automation System Based on IEC61850

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Electricity 2014年第5期25卷 24-28页

作者： Gao Xiang qiu zhiyong Shanghai Yi-Hao Automation Co. Ltd. Shanghai East China Grid Company Limited.

This paper illustrates the feature of substation automation system(SAS) based on IEC6180 and analyzes the situation of IEC61850 projects implemented since 2009. Some issues associated with the maintenance of SAS are proposed. The prospects of IEC61850 are discussed in terms of design, construction, routine maintenance as well as fault analysis.

关键词： smart substation IEC61850 SCD maintenance

The investigation of symptoms burden and treatment status in patients with bone metastasis

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The Chinese-German Journal of Clinical Oncology 2010年第2期9卷 63-67页

作者： zhiyong Shi Hong qiu Shiying Yu Cancer Center Tongji Hospital Tongji Medical College Huazhong University of Science ＆ Technology Wuhan 430030 China

Objective:This survey was a non-intervention study,which aimed to investigate symptom burden and treatment status in cancer patient with bone metastasis,and to make out whether patients received the normative ***:We designed a questionnaire,the main items of which include patient's symptom burden,previous and ongoing *** used it to investigate 120 patients from six different medical *** examined the association between symptoms using Spearman's rank *** software was used to analyze ***:The data of one hundred one questionnaires were completed and fitted for *** five most prevalent symptoms were fatigue(84.2%),unhappiness(83.2%),pain(77.2%),dry mouth(77.2%) and lack of appetite(73.3%).Three symptom clusters were *** 1 included anxiety and unhappiness and accounted for 61.4% in all *** 2 included pain,fatigue and constipation and accounted for 39.6% in all *** 3 included nausea,vomiting,lack of appetite and accounted for 27.7% in all ***'s alpha coefficient demonstrated high internal reliability in the clusters,with a coefficient ranging from 0.65 to *** proportion of patients receiving analgesic therapy,bisphosphates therapy,palliative chemotherapy and radiotherapy were 70.3%,63.4%,58.4% and 36.6% *** in various degree was obviously alleviated(P < 0.01) after analgesic *** the surveyed patients,64 patients received bisphosphates therapy,while the administration of zoledronic acid accounted for the most large *** average duration of bisphosphates administration was 5.79 months(SD = 7.43).Patients who received radiotherapy adopted multiple fractions treating ***:Symptom burden was common and severe in patients with bone metastasis,which often appeared as symptom cluster,and significantly affected their quality of life(QOL).The normative treatment should be strengthened to manage and control patients' sy

关键词： bone metastasis symptom burden skeletal related events (SREs) bisphosphates