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Search Results: 1 - 10 of 89402 matches for " CHEN Mao-Quan "
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THE EFFECT OF FLOWING PLASMA IN TOKAMAK ON TEARTING MODES
流动等离子体对托卡马克中撕裂模的影响

Wang Mao-quan,
汪茂泉

物理学报 , 1986,
Abstract: In this article, the activities of tearing modes was analyzed when the plasma in Tokamak has a flowing velocity. The analysis and numerical calculation indicate, the total flowing of the plasma (equiylent to a. plasma with a rotational frequency) does not influence the activities of tearing modes, only causes the rotation of the magnetic island with a frequency equal to the rotational frequency, of the plasma, The applied helical magnetic field can suppress the rotation of the plasma effectively in the tearing layer. The role of stabilization of the helical magnetic field on the tearing modes is not affected by the plasma rotation.
Impacts of different concentrations of main pollutants from the synthetic leather industry on the physiology and ecology of Pinus taiwanensis
合成革主要化学污染物对黄山松生理生态特性的浓度效应研究

CHEN Mao-Quan,WANG Gen-Xuan,LIU Shu-Xin,BAI Yan-Yuan,YING Jun-Hui,CHEN Bing-Hong,WANG Dong-Ming,
陈茂铨
,王根轩,刘术新,白燕远,应俊辉,陈兵红,王东明

植物生态学报 , 2011,
Abstract: Aims Vegetation in developed areas of China has been polluted by dimethylformamide (DMF) and toluene (TOL),solvents used in the synthetic leather industry;however,little research has been done on the impact of these pollutants on the physiology and ecology of trees.Methods In this paper,we studied the pollution effects of DMF and TOL on the physiological and ecological characteristics of Pinus taiwanensis.Important findings DMF began to induce an increase in total soluble sugars and glutathione (GSH) in the...
EXPERIMENTAL INVESTIGATION ABOUT TWO-MODE SQUEEZED STATE GENERATION OF LIGHT FIELD
双模光场压缩态的实验研究

PENG KUN-CHI,HUANG MAO-QUAN,LIU JING,LIAN YI-MIN,ZHANG TIAN-CAI,YU CHEN,XIE CHANG-DE,GUO GUANG-CAN,
彭堃墀
,黄茂全,刘晶,廉毅敏,张天才,于辰,谢常德,郭光灿

物理学报 , 1993,
Abstract: Two-mode squeezed states of light field are experimentally generated by nondegenerate parametric down conversion in an optical cavity. Noise reductions of about 30% relative to the vacuum noise level are obtained in the quiet quadrature of the electromagnetic field.
A Robust Video Coding Scheme for Mobile Wireless Communications
Mao-Quan Li,Zheng-Quan Xu,Yan-Yan Xu
Journal of Multimedia , 2009, DOI: 10.4304/jmm.4.6.405-411
Abstract: Error resilience is an important issue when coded video data is transmitted over mobile wireless channels which are characterized by long burst of packet loss. This paper presents a robust video coding scheme to recover the lost information corrupted by burst errors. Firstly, spatial decimation divides each frame into two similar fields which can be used to correct each other by spatial error concealment. Secondly, field-level Alternative Multihypothesis Motion Compensated Prediction makes the error from even top fields and odd bottom fields decrease and converge to zero quickly and automatically. Thirdly, temporal interleaving is applied to disperse burst error to different frames. Finally, post-processing is employed to eliminate discrepancy caused by error propagation between two fields. This error concealment scheme can recover up to three to four successive lost frames to acceptable quality. Simulation results show that the proposed scheme provides superior subjective and objective video quality than conventional schemes in long burst packet loss environment.
THE RESTRAINT OF THE TEARING MODES IN TOKAMAK
托卡马克中撕裂模的抑制

WANG MAO-QUAN,ZHAO QIN-ZHU,
汪茂泉
,赵晴初

物理学报 , 1984,
Abstract: In this article, the restraint of the spontanueous tearing modes caused by RHF is analyzed and calculated by solving the resistive MHD equations. We prove that the growth rate of the tearing modes of m=2 can be reduced about two times by the helical fields. The restraint of the tearing modes by the boundary controlled field is also discussed and calculated numerically.
SUPPRESSING THE TEARING MODES IN TOKAMAK BY ELECTRON CYCLOTRON RESONANCE HEATING
用电子迴旋共振加热抑制托卡马克中的撕裂模

Wang Mao-quan,Zhan Ru-juan,
汪茂泉
,詹如娟

物理学报 , 1986,
Abstract: Using the localization of electron cyclotron resonance heating, the profile of plasma current is improved so that the conditions of stabilities of tearing modes are also improved. As long as the absorbed region of electron cyclotron resonance heating covers the resonance layer of tearing modes, the effect of stabilizinl is very good. It is not necessary to require that electron cyclotron resonance surface must coincide with that of tearing mode strictly. In the period of electron cyclotron heating, the tearing mode is suppressed effectively.
PREPARATION AND PROPERTIES OF NANO-CeO2/Zn COMPOSITE MATERIAL
纳米CeO2/Zn复合材料制备及其性能研究

WANG Qian,XUE Mao-quan,
王乾
,薛茂权

腐蚀科学与防护技术 , 2007,
Abstract: The nanocomposite powders and nanocomposite materials of CeO2/Zn were prepared by high energy ball milling and vacuum hot pressing-sintering, respectively, of which the microstructure was investigated by XRD and FESEM. The corrosion resistance and hardness of CeOE/Zn composites with different amount of nano-CeO2 were comparatively studied, and thereby, the optimal amount of nano-CeO2 was found. The results show that metal corrosion resistance, hardness and density of the camposites may be improved significantly by addition of nano-CeO2, and the optimal amount of nano-CeO2 is 1%.
交换半环上半线性空间的维数
Dimensions of semilinear spaces over commutative semirings

张后俊, 储茂权
ZHANG Hou-jun
, CHU Mao-quan

- , 2015, DOI: 10.6040/j.issn.1671-9352.0.2014.229
Abstract: 摘要: 探究了交换半环上半线性空间的维数。给出了交换半环L上半线性空间Vn维数为n的充要条件且得到了Vn与V1之间的关系。此外介绍了半线性空间中半线性变换A及其值域A(V)与核A-1(0)的概念, 并证明了等式 dim(A(Vn))+dim(A-1(0))=dim(Vn)。
Abstract: The dimensions of semilinear spaces over commutative semirings L are investigated. Some necessary and sufficient conditions that dim(Vn)=n are given, and the relationship between Vn and V1 are obtained, where Vn and V1 are finite dimensional semilinear spaces over L. Moreover, the concepts of semilinear transformation A, and the range A(Vn) and nuclear A-1(0) of A are introduced and the equation dim(A(Vn))+dim(A-1(0))=dim(Vn) is proved
Uranium Series Disequilibrium in Naked Rocks from Huoshaoyu Island, Xiamen
厦门火烧屿裸露岩石的铀放射系不平衡

LIU Guang-shan,XU Mao-quan,HUANG Yi-pu,
刘广山
,徐茂泉,黄奕普

地球学报 , 2003,
Abstract: The natural radionuclides in naked rocks from Huoshaoyu island of Xiamen were measured by means of HPGe (spectroscopy,and the 40K, 228Ra, 228Th, 238U, 226Ra and 210Pb were detected. Based on a discussion on the disequilibrium of uranium series, it is found that in most samples 226Ra relative to 238U and 210Pb relative to 226Ra are deficient. It can thus be concluded that the migration of 226Ra from the coastal rocks into seawater by water leaching is a source of 226Ra in seawater and that the 210Pb formed by the decaying of 222Rn escaped from rocks is a source of 210Pb in seawater.
ASYMMETRIC CONTROL CHARACTERISTICS OF DYE BDN ON THE TWO TRAVELLING WAVES IN A RING YAG LASER

HUANG MAO-QUAN,ZHENG JIN-LING,LI RUI-NING,GAO JIANG-RUI,ZHANG KUAN-SHOU,SU DA-CHUN,

中国物理 B , 1996,
Abstract: It is discovered experimentally that, when placing a plate of dye BDN in a ring YAG laser cavity, the dye shows asymmetric control actions on the clockwise and counter-clockwise travelling waves. Unidirectional dye Q-switched operation is realized in a ring cavity based on this property without the use of Faraday rotator, polarizer and half-wave plate. A simplified theoretical analysis of this phenomenon is presented.
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