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Criterion of quiescent and eruptive prominences with helical structure

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Chinese Science Bulletin 1995年第1期40卷 57-61页

作者：许敖敖吴桂平 Department of Astronomy Nanjing University Nanjing 210008 China physics teaching research section Nanjing Railway Medical College Nanjing 210009 China

Many authors have studied the regularity and properties of evolution and eruption of the helical prominence observationally or theoretically. We proposed that Lundquist field may be a good configuration to describe the inner magnetic distribution of the helical promincence by analyzing this kind of quiescent and eruptive prominences. In this note,we discuss the stable criterion of Lundquist field according to energy principle and compare theory with observational data of 28 helical prominences. This work not only has confirmed the close relation between the Lundquist field and the helical prominence, but al-

关键词： prominence with helical structure Lundquist field kink instability.

Cross section measurement for the^(232)Th(n,f)reaction in the 4.50−5.40 MeV region using a time projection chamber

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Chinese physics C 2024年第10期48卷 157-167页

作者： Haofan Bai Han Yi Yankun Sun Yiwei Hu Jie Liu Zepeng Wu Cong Xia Wenkai Ren Wentian Cao Tieshuan Fan Guohui Zhang Ruirui Fan Yang Li Wei Jiang Yonghao Chen You Lv Changjun Ning Weihua Jia Zhiyong Zhang Haolei Chen Zhen Chen Maoyuan Zhao Changqing Feng Shubin Liu State Key Laboratory of Nuclear physics and Technology Institute of Heavy Ion PhysicsPeking UniversityBeijing 100871China Institute of High Energy physics Chinese Academy of SciencesBeijing 100049China Spallation Neutron Source Science Center Dongguan 523803China National Key Laboratory of Intense Pulsed Radiation Simulation and Effect Northwest Institute of Nuclear TechnologyXi'an 710024China Department of Nuclear Science and Technology School of Energy and Power EngineeringXi’an Jiaotong UniversityXi’an 710049China State Key Laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefei 230026China Department of Modern physics University of Science and Technology of ChinaHefei 230026China

Accurate cross sections of neutron induced fission reactions are required in the design of advanced nuclear systems and the development of fission *** projection chambers(TPCs),with their track reconstruction and particle identification capabilities,are considered the best detectors for high-precision fission cross section *** TPC developed by the back-streaming white neutron source(Back-n)team of the China Spallation Neutron Source(CSNS)was used as the fission fragment detector in *** this study,the cross sections of the ^(232)Th(n,f)reaction at five neutron energies in the 4.50−5.40 MeV region were *** fission fragments and α particles were well identified using our TPC,which led to a higher detection efficiency of the fission fragments and smaller uncertainty of the measured cross *** is the first measurement of the ^(232)Th(n,f)reaction using a TPC for the detection of fission *** uncertainties less than 5%,our cross sections are consistent with the data in different evaluation libraries,including JENDL-4.0,ROSFOND-2010,CENDL-3.2,ENDF/B-VⅢ.0,and BROND-3.1,whose uncertainties can be reduced after future improvement of the measurement.

关键词： ^(232)Th(n,f)fission cross section time projection chamber(TPC) ^(232)Th

Robust Quantum Secure Direct Communication and Deterministic Secure Quantum Communication over Collective Dephasing Noisy Channel

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Communications in Theoretical physics 2008年第9期50卷 627-632页

作者： YUAN Hao SONG Jun HE Qin HAN Lian-Fang HOU Kui HU Xiao-Yuan SHI Shou-Hua Department of Mathematics ＆ physics West Anhui University Lu＇an 237012 China School of physics ＆ Material Science Anhui University Hefei 230039 China teaching ＆ research section of physics School of Basic Medical Science Anhui Medical University Hefei 230032 China

We propose two schemes for quantum secure direct communication (QSDC) and deterministic securequantum communication (DSQC) over collective dephasing noisy *** our schemes,four special two-qubit statesare used as the quantum *** these states are unchanged through the collective dephasing noisy channel,the effect of the channel noise can be perfectly ***,the security against some usual attacks canbe ensured by utilizing the various checking ***,these two schemes are feasible with present-daytechnique.

关键词： quantum secure direct communication deterministic secure quantum communication collective dephasing noisy channel special two-qubit states

Soliton solutions for nonlinear variable-order fractional Korteweg-de Vries(KdV)equation arising in shallow water waves

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Journal of Ocean Engineering and Science 2024年第1期9卷 50-58页

作者： Umair Ali Hijaz Ahmad Hanaa Abu-Zinadah Department of Applied Mathematics and Statistics Institute of Space TechnologyP.O.Box 2750Islamabad 44000Pakistan Near East University Operational Research Center in HealthcareNear East BoulevardPC:99138 Nicosia/Mersin 10Turkey section of Mathematics International Telematic University UninettunoCorso Vittorio Emanuele II3900186 RomaItaly University of Jeddah College of ScienceDepartment of StatisticsJeddahSaudi Arabia

Nonlinear fractional differential equations provide suitable models to describe real-world phenomena and many fractional derivatives are varying with time and *** present study considers the advanced and broad spectrum of the nonlinear(NL)variable-order fractional differential equation(VO-FDE)in sense of VO Caputo fractional derivative(CFD)to describe the physical *** VO-FDE transforms into an ordinary differential equation(ODE)and then solving by the modified(G/G)-expansion *** ac-curacy,the space-time VO fractional Korteweg-de Vries(KdV)equation is solved by the proposed method and obtained some new types of periodic wave,singular,and Kink exact *** newly obtained solutions confirmed that the proposed method is well-ordered and capable implement to find a class of NL-VO *** VO non-integer performance of the solutions is studied broadly by using 2D and 3D graphical *** results revealed that the NL VO-FDEs are highly active,functional and convenient in explaining the problems in scientific physics.

关键词： Space-time VO fractional KdV equation modiﬁed(G′/G)-expansion method VO Caputo fractional derivative generalized Riccati equation

Electronic,thermodynamic and elastic properties of pyrite RuO_2

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Chinese physics B 2009年第11期18卷 4981-4987页

作者：杨则金郭云东王光昶李劲戴伟刘锦超程新路杨向东 Institute of Atomic and Molecular physics of Sichuan University School of physics and Electronic Information Engineering Neijiang Normal University teaching and researching section of physics Chengdu Medical College College of Material and Chemical Engineering Hainan University Chinese Academy of Engineering physics

This paper calculates the elastic, thermodynamic and electronic properties of pyrite （Pa^-3） RuO2 by the plane-wave pseudopotential density functional theory （DFT） method. The lattice parameters, normalized elastic constants, Cauchy pressure, brittle-ductile relations, heat capacity and Debye temperature are successfully obtained. The Murnaghan equation of state shows that pyrite RuO2 is a potential superhard material. Internal coordinate parameter increases with pressure, which disagrees with experimental data. An analysis based on electronic structure and the pseudogap reveals that the bonding nature in RuO2 is a combination of covalent, ionic and metallic bonding. A study of the elastic properties indicates that the pyrite phase is isotropic under usual conditions. The relationship between brittleness and ductility shows that pyrite RuO2 behaves in a ductile matter at zero pressure and the degree of ductility increases with pressure.

关键词： elastic property thermodynamic property electronic structure

Review of 2D Bi_(2)X_(3)(X=S,Se,Te):from preparation to photodetector

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Rare Metals 2024年第6期43卷 2349-2370页

作者： Zhi Zeng Dong-Bo Wang Xuan Fang Jia-Mu Cao Bing-Ke Zhang Jing-Wen Pan Dong-Hao Liu Si-Hang Liu Shu-Jie Jiao Tian-Yuan Chen Gang Liu Lian-Cheng Zhao Jin-Zhong Wang Department of Optoelectronic Information Science School of Materials Science and EngineeringHarbin Institute of TechnologyHarbin 150001China Changchun University Science and Technology School of PhysicsThe State Key Laboratory of High Power Semiconductor LasersChangchun 130022China School of Astronautics Harbin Institute of TechnologyHarbin 150001China Center for High Pressure Science and Technology Advanced research Shanghai 201203China

Detector has become an indispensable part of human *** increasing demand for photodetectors with high performance has promoted the research of novel *** the same time,with the development of rising material system,two-dimensional(2D)materials attract a lot of attention,while the suitable option for fabricating photodetector is still *** prospering of bismuth chalcogenides injected new vitality for material field,thereinto,the unique topological insulator characteristics make the research on bismuth selenide(Bi_(2)X_(3))and bismuth telluride(Bi_(2)X_(3)) intriguing.2D Bi_(2)X_(3) also exhibits unique features among various 2D materials,of which,the adjustable narrow energy band gap and polarization-sensitive photocurrent contribute to the promising application of high performance and broadband *** this review,from a bottom-up perspective,we summarize fundamental properties,synthesis method,photodetector performance of 2D Bi_(2)X_(3) based on the previous study,which provide an overall perspective of 2D Bi_(2)X_(3).Wherein,the section of the photodetector is specifically discu ssed with regard to pure Bi_(2)X_(3) photodetector and heterojunction photodetector.A brief summary and outlook were also explored in the end.

关键词： Bi_(2)X_(3) Preparation 2D Photodetector

Deterministic Secure Quantum Communication with Cluster State and Bell-Basis Measurements

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Communications in Theoretical physics 2008年第11期50卷 1105-1108页

作者： YUAN Hao HE Qin HU Xiao-Yuan HOU Kui HAN Lian-Fang SHI Shou-Hua Department of Mathematics and physics West Anhui University Lu＇an 237012 China School of physics and Material Science Anhui University Hefei 230039 China teaching and research section of physics School of Basic Medical Science Anhui Medical University Hefei 230032 China

We present a novel protocol for deterministic secure quantum communication by using the lour-qubit cluster state as quantum channel. It is shown that two legitimate users can directly transmit the secret messages based on Bellbasis measurements and classical communication. The present protocol makes use of the ideas of block transmission and decoy particle checking technique. It has a high capacity as each cluster state can carry two 5its of information, and has a high intrinsic efficieney 5ecause almost all the instances except the decoy checking particles （its numSer is negligible） are useful. Furthermore, this protocol is feasible with present-day technique.

关键词： deterministic secret quantum communication cluster state Bell-basis measurement block transmission decoy photon checking technology

Three-Party Quantum State Sharing of an Arbitrary Unknown Two-Qubit State Based on Entanglement Swapping and Bell-State Measurements

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Communications in Theoretical physics 2009年第7期52卷 50-54页

作者： YUAN Hao SONG Jun HOU Kui HU Xiao-Yuan HAN Lian-Fang SHI Shou-Hua Department of Mathematics ＆ physics West Anhui University Lu＇an 237012 China School of physics ＆ Material Science Anhui University Hefei 230039 China teaching ＆ research section of physics School of Basic Medical Science Anhui Medical University Hefei 230032 China

We propose a scheme for sharing an arbitrary unknown two-qubit state among three parties by using afour-qubit cluster-class state and a Bell state as a quantum channel With a quantum controlled phase gate (QCPG)operation and a local unitary operation,any one of the two agents has the access to reconstruct the original state ifhe/she collaborates with the other one,whilst individual agent obtains no *** all quantum resource canbe used to carry the useful information,the intrinsic efficiency of qubits approaches the maximal ***,thepresent scheme is more feasible with present-day technique.

关键词： quantum state sharing entanglement swapping Bell-state measurements QCPG operation local unitary operation

Terminal Angular Constraint Integrated Guidance and Control for Flexible Hypersonic Vehicle with Dead-Zone Input Nonlinearity

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Journal of Beijing Institute of Technology 2020年第4期29卷 489-503页

作者： Hewei Zhao Detection Guidance and Control teaching research section Naval Aviation UniversityYantai 264001ShandongChina

This paper presents an integrated guidance and control model for a flexible hypersonic vehicle with terminal angular *** integrated guidance and control model is bounded and the dead-zone input nonlinearity is considered in the system *** line of sight angle,line of sight angle rate,attack angle and pitch rate are involved in the integrated guidance and control *** controller is designed with a backstepping method,in which a first order filter is employed to avoid the differential *** full tuned radial basis function(RBF)neural network(NN)is used to approximate the system dynamics with robust item coping with the reconstruction errors,the exactitude model requirement is reduced in the controller *** the last step of backstepping method design,the adaptive control with Nussbaum function is used for the unknown dynamics with a time-varying control gain *** uniform ultimate boundedness stability of the control system is *** simulation results validate the effectiveness of the controller design.

关键词： hypersonic vehicle terminal angular constraint dead-zone input nonlinearity full tuned radial basis function(RBF)neural network(NN) integrated guidance and control