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Science China(Physics,Mechanics & Astronomy) 2024年第10期67卷 1-11页

作者： Xu-Xing geng Kai Jin Lu zhou Wang-Wang Tang Guoqing Yang Shangqing Liang Shao-Ping Wu guang-Ming Huang Gao-Xiang Li Department of Physics Huazhong Normal UniversityWuhan 430079China College of Electronics and Information Hangzhou Dianzi UniversityHangzhou 310018China State Key Laboratory of Precision Spectroscopy School of Physics and Electronic ScienceEast China Normal UniversityShanghai 200241China

Multidimensional Floquet-driven alignment systems with dynamical symmetry present various exotic phenomena and ***,there are challenges in directly characterizing large-spin dynamical symmetry from ***,we first observe the symmetry-protected selection rules of dynamical high-dimensional parity in a large-spin(F=4)*** theoretically construct a Floquet-driven alignment system that can be used to reveal high-dimensional spatiotemporal *** the experiment,the system is implemented in Cs atomic gas subjected to two-dimensional Floquet-modulated magnetic resonance *** developing Floquet detection protocols of alignment double-sided spectra,we directly verify symmetry-protected selection rules of dynamical high-dimensional parity for large-spin *** work advances the exploration of dynamical symmetry to large spins,and unravels a universal Floquet scheme for the investigation of symmetry-protected selection rules.

关键词： dynamical high-dimensional symmetry symmetry-protected selection rules large-spin alignment magnetic resonance,Floquet two-mode detection

Persistent Spin Current in a Hard-Wall Confining Quantum Wire with Weak Dresselhaus Spin-Orbit Coupling

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Communications in Theoretical Physics 2009年第2期51卷 341-344页

作者： FU Xi zhou guang-Hui Department of Physics Hunan Normal University Changsha 410081 China Department of Electronics and Physics Hunan College of Science and Technology Yongzhou 425100 China

We investigate theoretically the spin current in a quantum wire with weak Dresselhaus spin-orbit coupling connected to two normal conductors. Both the quantum wire and conductors are described by a hard-wall confining potential. Using the electron wave-functions in the quantum wire and a new definition of spin current, we have calculated the elements of linear spin current density j^Ts,xi and j^Ts,yi（i=x, y, z）. We find that the elements j^Ts,xx and j^Ts,yy have a antisymmetrical relation and the element j^Ts,yz has the same amount levelas j^Ts,xx and j^Ts,yy. We also find a net linear spin current density, which has peaks at the center of quantum wire. The net linear spin current can induce a linear electric field, which may imply a way of spin current detection.

关键词： quantum wire Dresselhaus spin-orbit coupling spin current

Spin Accumulation in a Rashba Nanoribbon

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Communications in Theoretical Physics 2009年第7期52卷 159-162页

作者： FU Xi zhou guang-Hui Department of Physics Hunan Normal University Changsha 410081 China Department of Electronics and Physics Hunan University of Science and Engineering Yongzhou 425100 China

We investigate theoretically the spin accumulation in a Rashba spin-orbit coupling (SOC) nanoribbon nonadiabatically connected to a normal *** the nanoribbon and conductor are described by a hard-wall confining *** the scattering matrix approach within the effective free-electron approximation,we have calculated the out-of-plane spin accumulation in the *** is found that the spin accumulation shifts toward the two edges of nanoribbon with the increasing of propagation ***,as the Rashba SOC strength increases the spin accumulation in the nanoribbon will be enhanced and this result may suggest us a simple method to control the spin accumulation of the system by Rashba SOC strength.

关键词： nanoribbon Rashba spin-orbit coupling spin accumlation

Human Digital Twin(HDT)Driven Human-Cyber-Physical Systems:Key Technologies and Applications

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Chinese Journal of Mechanical Engineering 2022年第1期35卷 1-6页

作者： Baicun Wang Huiying zhou geng Yang Xingyu Li Huayong Yang State Key Laboratory of Fluid Power and Mechatronic Systems School of Mechanical EngineeringZhejiang UniversityHangzhou 310027China Department of Mechanical Engineering University of MichiganAnn ArborMI 48109USA

1 Introduction Traditional industrial systems,where physical systems,i.e.,robots and machines,replaced manual labor mostly,are often known as human-physical system(HPS)[1].Cyber system,a major outcome of the digitalization revolution,is increasingly adopted in HPS and continuously evolving with the development of advanced manufacturing technologies,leading to the human-cyber-physical system(HCPS)[2].

关键词： system mostly Key

Hierarchy of Combined TL-RTL Equations and an Associated （2＋l）-Dimensional Lattice Equation

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Communications in Theoretical Physics 2006年第5X期46卷 773-778页

作者： JIANG Qiao-Yun zhou Ru-guang Department of Mathematics Nantong University Nantong 226007 China Department of Mathematics Xuzhou Normal University Xuzhou 221116 China

A new （29-1）-dimensional lattice equation is presented based upon the first two members in the hierarchy of the combined Toda lattice and relativistic Toda lattice （TL-RTL） equations in （19991） dimensions. A Darboux transformation for the hierarchy of the combined TL-RTL equations is constructed. Solutions of the first two members in the hierarchy of the combined TL-RTL equations, as well as the new （29-1）-dimensional lattice equation are explicitly obtained by the Darboux transformation.

关键词： combined TL-RTL equation integrable system Darboux transformation Toda lattice equation relativistic Toda lattice equation

Single-ended Fault Detection Scheme Using Support Vector Machine for Multi-terminal Direct Current Systems Based on Modular Multilevel Converter

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Journal of Modern Power Systems and Clean Energy 2023年第3期11卷 990-1000页

作者： guangyang zhou Xiahui Zhang Minxiao Han Shaahin Filizadeh Zhi geng School of Electrical and Electronic Engineering North China Electric Power UniversityBeijing 102206China Department of Electrical and Computer Engineering University of ManitobaWinnipegCanada

This paper proposes a single-ended fault detection scheme for long transmission lines using support vector machine(SVM)for multi-terminal direct current systems based on modular multilevel converter(MMC-MTDC).The scheme overcomes existing detection difficulties in the protection of long transmission lines resulting from high grounding resistance and attenuation,and also avoids the sophisticated process of threshold value *** high-frequency components in the measured voltage extracted by a wavelet transform and the amplitude of the zero-mode set of the positive-sequence voltage are the inputs to a trained *** output of the SVM determines the fault type.A model of a four-terminal DC power grid with overhead transmission lines is built in PSCAD/*** results of EMTDC confirm that the proposed scheme achieves 100%accuracy in detecting short-circuit faults with high resistance on long transmission *** proposed scheme eliminates mal-operation of DC circuit breakers when faced with power order changes or AC-side *** robustness and time delay are also assessed and shown to have no perceptible effect on the speed and accuracy of the detection scheme,thus ensuring its reliability and stability.

关键词： Fault detection short-circuit fault multi-terminal direct current systems based on modular multilevel converter support vector machine(SVM) wavelet transform

Revitalizing Human-Robot Interaction: Phygital Twin Driven Robot Avatar for China-Sweden Teleoperation

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Chinese Journal of Mechanical Engineering 2023年第5期36卷 1-6页

作者： Huiying zhou Honghao Lv Ruohan Wang Haiteng Wu geng Yang State Key Laboratory of Fluid Power and Mechatronic Systems School of Mechanical EngineeringZhejiang UniversityHangzhou 310027China Hangzhou Shenhao Technology Co. Ltd.Hangzhou 310000China Zhejiang Key Laboratory of Intelligent Operation and Maintenance Robot Hangzhou 310000China

1 Introduction Digital Twin(DT)is built and maintained in the digital rather physical realm[1,2].Dynamic DT mirrors the exact state of the physical system by means of multidimensional models describing the behavior of physical entity,and sensors providing the real-time coupling to models[3].Te outbreak of COVID-19 pandemic results in speeding up the virtualization and digitization of the physical entity with the support from ***,quarantine and division led by COVID-19 pandemic make human beings’eyes for the physical interaction become more *** physical world and the digital world are becoming interwoven,which indicates a new opportunity towards phygital *** is so often the question:how can I get closer to my distant companion?How can I extend my service or emotional concern to facilitate interaction in spite of space obstruction?Tese questions deserve thinking as a lesson learned from outbreak of COVID-19 pandemic.

关键词： Twin Robot closer

Chemical Intervention on Staphylococcus aureus Virulence

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Chinese Journal of Chemistry 2019年第2期37卷 183-193页

作者： Lin-Lin zhou Cai-guang Yang State Key Laboratory of Drug Research Shanghai Institute of Materia MedicaChinese Academy of SciencesShanghai 201203China University of the Chinese Academy of Sciences Beijing 100049China

Resistance to conventional antibiotics has raised worldwide attention. Notably, Methicillin-resistant Staphylococcus aureus (MRSA) has become one of the most life-threatening health concerns. Although effective against bacterial infections, conventional antibiotics have also showed a series of side effects such as gut microbiota imbalance.

关键词： Chemical Intervention Staphylococcus aureus Virulence

Long Non-coding RNAs and Their Roles in Non-small-cell Lung Cancer

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Genomics, Proteomics & Bioinformatics 2016年第5期14卷 280-288页

作者： Ming-Ming Wei guang-Biao zhou State Key Laboratory of Membrane Biology Institute of ZoologyChinese Academy of SciencesBeijing 100101China University of Chinese Academy of Sciences Beijing 100049China

As a leading cause of cancer deaths worldwide, lung cancer is a collection of diseases with diverse etiologies which can be broadly classified into small-cell lung cancer （SCLC） and non-small-cell lung cancer （NSCLC）. Lung cancer is characterized by genomic and epigenomic alterations; however, mechanisms underlying lung tumorigenesis remain to be elucidated. Long noncoding RNAs （lncRNAs） are a group of non-coding RNAs that consist of ≥ 200 nucleotides but possess low or no protein-coding potential. Accumulating evidence indicates that abnormal expression of lncRNAs is associated with tumorigenesis of various cancers, including lung cancer, through multiple biological mechanisms involving epigenetic, transcriptional, and post-transcriptional alterations. In this review, we highlight the expression and roles of lncRNAs in NSCLC and discuss their potential clinical applications as diagnostic or prognostic biomarkers, as well as therapeutic targets.

关键词： Long non-coding RNA Non-small-cell lung cancer Expression spectrum Biomarker Therapeutic resistance

Measurement on soil deformation caused by expanded-base pile in transparent soil using particle image velocimetry (PIV)

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Journal of Mountain Science 2017年第8期14卷 1655-1665页

作者： QI Chang-guang ZHENG Jin-hui ZUO Dian-jun CHEN geng Faculty of Architectural Civil Engineering and EnvironmentNingbo University Tianjin Research Institute for Water Transport Engineering M.O.T. Geotechnical Research Institute Hohai University

A new small-scale geotechnical physical model in 1-g and unconfined condition, combining the transparent soil, close-range photogrammetry and particle image velocimetry(PIV), was employed, which provides a non-intrusively internal deformation measurement approach to monitor the internal deformation of soil caused by expanded-base pile jacking with casing. The transparent soil was made of fused quartz and its refractive index matched blended oil, adding reflective particles(glass beads). Closerange photogrammetry was employed to record the images of the process of casing jacking and extraction in transparent soil, allowing the use of Matlab-based Geo-PIV to figure out the displacement field converted from image space to object space. Analysis of test results indicates that the maximum displacement caused by casing jacking for expandedconical-base pile is decreased by 29% compared with that for expanded-flat-base pile. The main movement happens at the early stage of casing extraction. The maximum displacement caused by casing extraction for the conical base is about 43% of that for the flatbase, while the affected zone caused by casing extraction for the conical base accounts for about 1/3 of that for the flat base. The contraction for horizontal displacements tends to decrease with the depth increasing. By contrast, the contraction under pile base decreases with the increasing of displacement. The displacements generated by jacking a conventional pile having a diameter equal to the casing diameter of the expanded-base pile were comparable to the net displacement taking place due to expanded-base pile installation for the conical base pile.

关键词： Geotechnical physical model Expanded-base pile Transparent soil Particle image velocimetry(PIV) Close-range photogrammetry