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Triple Plasmon Decay of Electromagnetic Pump Wave

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Chinese Physics Letters 1995年第7期12卷 404-407页

作者： hu xiwei Department of Modern Physics University of Science and Technology of ChinaHefei 230026

A fluid description of the triple plasmon decay process has been *** linear and nonlinear analyses suggest that this parameter process will occur very likely at the local area where the plasma density is about n_(c)/*** analyses with saddle point method of integration indicate also that the triple plasmon decay process is absolutely unstable.

关键词： analyses decay absolutely

Special issue on the 70th anniversary of huST

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Plasma Science and Technology 2022年第12期24卷 4-5页

作者： xiwei hu International Joint Research Laboratory of Magnetic Confinement Fusion and Plasma Physics State Key Laboratory of Advanced Electromagnetic Engineering and TechnologySchool of Electric and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074People's Republic of China

huazhong University of Science and Technology (huST) celebrates its 70th anniversary in *** was transferred to a comprehensive and modern university on the international level in the 1980s from its traditional engineering predecessor,huazhong Institute of Technology,founded in the early 1950s as part of China’s academic institution reorganization.

关键词： anniversary 70t transferred

Mechanism of Low Pressure dc Breakdown in a Thermo-Cathode Gas Discharge

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Chinese Physics Letters 1993年第7期10卷 417-420页

作者： hu xiwei CHEN Yang Department of Modern Physics University of Science and Technology of ChinaHefei 230026

A theory about the dc breakdown process of a gas discharge with thermocathode in a very low pressure(10^(-2) Pa)is *** mobility of ions due to ion-neutral charge exchange collisions is mainly responsible for the space cumulative effect of positive charges and the formation of the virtual anode.A numerical result for the breakdown process of the argon gas discharge is given.

关键词： neutral Cathode charges

Global Wave Solution of Generalized MHD Equations in a Cylindrical Plasma

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Chinese Physics Letters 1991年第11期8卷 570-573页

作者： YANG Weihong hu xiwei Department of Moders Physics University of Science and Technology of ChinaHefei230026

The linear eigenstate problem of generaLsed magnetohydrodynamics (MHD) equationg in a cylindrical plasma is *** effects of fnite frequency and finite pressure perturbation lead to an inportant result:the resonant layer of the shear Alfven waves is not a singular *** this paper,the MHD equations are reduced to four differential equations of first order for perturbed *** analytical dispersion relation for a homogeneous plasma cylinder is *** *** theory is a limiting case of our theory.

关键词： theory resonant cylindrical

A New Turbulent Collision Integral in Plasma Kinetic Equation

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Chinese Physics Letters 1992年第4期9卷 183-186页

作者： hu xiwei Department of Modern Physics University of Science and Technology of ChinaHefei 230026

A new turbulent collision integral is derived from the first and second BBGKY equations,in which the effects of well-developed turbulent field are taken into *** turbulent collision integral contains turbulent frequen... 详细信息

关键词： function turbulent collision

Absorption of electromagnetic wave by inhomogeneous,unmagnetized plasma

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Frontiers of Electrical and Electronic Engineering in China 2009年第2期4卷 210-213页

作者： Ming YAN Keran SHAO Gang LEI xiwei hu National Key Laboratory for Vessel Integrated Power System Technology Navy University of EngineeringWuhan 430033China College of Electrical and Electronic Engineering Huazhong University of Science and TechnologyWuhan 430074China

In this article,a novel and normalized Ztransform finite-difference time-domain(ZTFDTD)method is *** method uses a more general form of Maxwell’s equations using the E,H,D *** iterative model of D-E-H-D can be obtained by using the Z-transform resulted frequency-dependent formula between D and *** advantages of the ZTFDTD consist in that the discrete equations are simple,the results are precise,easy to program and capable of dealing with the key technologies of finite-difference time-domain(FDTD),such as absorbing boundary conditions(uniaxial anisotropic perfectly matched layer,UPML)and near-to-farfield *** ZTFDTD method is then used to simulate the interaction of electromagnetic wave with *** a simplified two-dimensional model,the stealth effect of inhomogeneous,unmagnetized plasma is studied both in different electron densities of plasma,different electromagnetic wave frequencies and different plasma collision *** numerical results indicate that plasma stealth is effective in theory and a reasonable selection with the plasma parameters that can greatly enhance the effectiveness of plasma stealth.

关键词： finite-difference time-domain(FDTD) Ztransform anisotropic perfectly matched layer plasma stealth radar cross section(RCS)

“外圣内王”何以可能?——对儒家传统政治哲学的反思

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新视野 2007年第3期 47-51,60页

作者：胡希伟清华大学哲学系

文章首先肯定了牟宗三先生在《政道与治道》一书中提出的“新外王”问题,即怎样对传统儒家思想进行现代化转换,使其与科学和民主接轨。文章认为,牟宗三先生之所以未能实现这一转换,是因为他沿袭了传统儒学“内圣外王”的思想,并将道德... 详细信息

文章首先肯定了牟宗三先生在《政道与治道》一书中提出的“新外王”问题,即怎样对传统儒家思想进行现代化转换,使其与科学和民主接轨。文章认为,牟宗三先生之所以未能实现这一转换,是因为他沿袭了传统儒学“内圣外王”的思想,并将道德和政治的关系问题视为政治哲学的核心。政治与道德分属不同的领域,而政治哲学的核心或研究对象是制度和法律。就此而言,传统儒家政治哲学并非与科学民主之径相悖,其表现就是包含在《礼记·礼运》中的“外圣内王”思想,即以大同社会的理想作为政治制度设计的范导性原则,而以小康社会的现实经验作为可行的制度安排。文章指出,沿着这一逻辑思路,借助于“新制度儒学”强调制度建设重要性的成果,就可以成为实现传统儒学现代化转化的具体途径,即通过制度和法律建设等程序正义手段,把民主宪政思想引入儒学实现社会的实质正义,而传统儒学又为政治哲学的制度建设提供了不同于西方个人主义原则的大同理想、社会正义和集体利益至上的超越性原则。

关键词：内圣外王外圣内王新制度儒学程序正义实质正义

Numerical modeling the interaction between externally applied resonant magnetic perturbations and tearing instabilities

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Numerical modeling the interaction between externally applie...

第十六届全国等离子体科学技术会议暨第一届全国等离子体医学研讨会

作者： Qiming hu Q.Yu Bo Rao Ge Zhuang Yonghua Ding Wei Jin Nengchao wang xiwei hu State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Max-Planck-Institut für Plasmaphysik EURATOM association85748 GarchingGermany

To compare with resonant magnetic perturbations(RMPs) related experimental results observed in J-TEXT tokamak,nonlinear numerical modeling based on reduced MHD equations has been carried *** experimental parameters as input,both the mode locking and mode stabilization by RMPs are also obtained from numerical modeling. Further calculations have been carried out to study the plasma parameters affecting the mode stabilization by RMPs,including the plasma rotation frequency,viscosity,Alfven velocity and the RMP *** is found that the suppression of the tearing mode by RMPs of moderate amplitude is possible for a sufficiently high ratio of plasma rotation velocity to the Alfven speed.A larger plasma viscosity enhances the mode stabilization. In addition,the non-uniform mode rotation frequency,modulated by electromagnetic force(Fern) and viscous force(Fvs),results in the applied RMPs contributing both net stabilizing and braking effect on *** evaluation based on analytical theory shows the applied RMP contributes a dominant stabilizing effect,which are responsible for the suppression of *** dynamics of the first discovered small locked island(SLI) are *** is found that the island is locked at the stabilizing phase and the saturated island width is less than the linear layer *** simulated Mirnov signal indicates the small locked island is likely to be the complete suppression case observed in experiments. The comparisons between the numerical and experimental results are in good agreement.

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电磁波在不均匀非磁化等离子体中的吸收

华中科技大学学报（自然科学版） 2007年第6期35卷 57-59页

作者：邵可然晏明雷刚胡希伟华中科技大学电气与电子工程学院湖北武汉430074

提出了一种新型归一化的Z变换FDTD算法(ZTFDTD).ZTFDTD采用DH模式,根据DE的频变关系式,利用Z变换形成D-E-H-D迭代模式,将这种方法用于电磁波与非磁化等离子体的仿真,通过二维模型分别仿真了在不同等离子体自由电子密度分布,不同电磁波... 详细信息

提出了一种新型归一化的Z变换FDTD算法(ZTFDTD).ZTFDTD采用DH模式,根据DE的频变关系式,利用Z变换形成D-E-H-D迭代模式,将这种方法用于电磁波与非磁化等离子体的仿真,通过二维模型分别仿真了在不同等离子体自由电子密度分布,不同电磁波频率和不同等离子体碰撞频率下,不均匀非磁化等离子体对电磁波的吸收衰减.数值结果表明,等离子体隐身在理论上是有效可行的,合理地设置等离子体参数,可以极大地增强等离子体隐身效果.

关键词：时域有限差分法(FDTD) Z变换等离子体隐身各向异性介质完全匹配层雷达散射截面(RCS)