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Search Results: 1 - 10 of 143584 matches for " Li Zan-Liang "
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MEASUREMENT OF DENSITY FLUCTUATIONS OF CT-6B TOKAMAK PLASMA
CT-6B托卡马克等离子体密度涨落的测量

DONG LI-FANG,WANG LONG,LI ZAN-LIANG,
董丽芳
,王龙,李赞良

物理学报 , 1996,
Abstract: 采用光学多道探测系统,观测了CT-6B托卡马克等离子体密度涨落的幅度、频率特性和相关性以及它们的空间分布.结果表明:等离子体密度涨落的幅度为10%—90%,边缘区的涨落幅度高,中心区的涨落幅度低;无论边缘区还是中心区的功率谱均为连续谱;并发现边缘区的涨落具有时断时续的局部相关结构,每次相关持续的时间为0.2—0.5ms,空间尺度为0.5—1cm.
VACUUM ULTRAVIOLET SPECTRA OF CT-6B TOKAMAK PLASMA
CT-6B托卡马克等离子体的真空紫外光谱

WANG WEN-SHU,LI ZAN-LIANG,HUANG MAO,
王文书
,李赞良,黄矛

物理学报 , 1987,
Abstract: A spectrographic survey of the impurity lines was made on the CT-6B Tokamak with I metre grazing incidence spectrograph. The observed wavelength ranges were from 1580 to 550 ? and from 460 to 43 ?, using 300 lines/mm and 1200 lines/mm gratings respecrively. The survey revealed that the main impurities in CT-6B Tokamak plasma are Mo for high Z impurities and C, N, O for low Z impurities. There are a large number of OV and OVI lines with intense emission. We also observed MoVIIl resonance lines 234.314 ?, 235.510 ? and 237.215 ?. The shortest observed wavelengths are the second order of OVII lines 21.6020 ? and 21804 ?. The first order of these two lines situate beyond the film and can not be recorded. According tc the features of the spectra and the ionization potentials of OV, OVI as well as MoVII, the average electron temperature for CT-6B Tokamak is estimated to be about 140 eV. Oxygen is the main impurity in CT-6B Tokamak, and its lines emission is the main portion of energy loss in CT-6B Tokamak. Lines of the main components of the vacuum-vessel material such as Fe, Cr, Ni and Ti have not been found.
SPECTROSCOPIC MEASUREMENT OF PLASMA POLOIDAL ROTATION ON THE CT-6B TOKAMAK
CT-6B托卡马克等离子体角向转动的光谱测量

ZHAO QING-XUN,LI ZAN-LIANG,ZHENG SHAO-BAI,
赵庆勋
,李赞良,郑少白

物理学报 , 1997,
Abstract: 利用高分辨光谱测量系统,根据杂质离子谱线OⅡ464.2nm,CⅢ464.7nm和氢Hα谱线的多普勒位移,测量了CT-6B托卡马克等离子体角向转动速度的径向分布.结果表明:杂质离子的角向转动速度的方向在等离子体内部为电子逆磁漂移方向,其线速度在小半径约9cm处达到极大值3.5km/s;在接近孔阑r=10cm处,反转为离子逆磁漂移方向.由此导出等离子体内部的径向电场向里,其最大值为18V/cm.中性氢原子只存在其方向为电子逆磁漂移方向的角向转动分量,其数值较杂质离子谱线所得结果要低.最后对所得的结果作了初步的讨论
SPECTROSCOPIC MEASUREMENT OF ELECTRON TEMPERA-TURE IN CURRENT RISING PHASE ON CT-6B TOKAMAK
CT-6B托卡马克装置上电流上升阶段电子温度的光谱测量

LI ZAN-LIANG,WANG WEN-SHU,LI WEN-LAI,LIU XIANG,LI XIAO-CHANG,
李赞良
,王文书,李文莱,刘翔,李孝昌

物理学报 , 1989,
Abstract: The time evolution of electron temperature in plasma current rising phase on CT-6B Tokamak is estimated by the history method for oxygen impurity lines. The time variations of line emissions of OII-OV1 in VUV region are measured by one-meter grazing incidence vacuum spectrometer and the electron density is measured by using FIR HCN laser interferometer. The switch-on time of each line emission is used for estimating electron temperature. The influences of oxygen impurity influx rate and confinement time on intensity and switch-on time of line emissions are surveyed numerically. The estimated electron temperatures arc around 3.6, 5.6, 7.3, 10.8 and 21 eV, respectively at 0.36, 0.56, 0.66, 0.90 and 1.4 ms after the start of discharge, which indicate the plasma temperature in central region.
Poloidal rotation of main ions in the CT-6B tokamak
Poioidai rotation of main ions in the CT-6B tokamak

Feng Chun-Hu,Li Zan-Liang,Yang Xuan-Zong,Zheng Shao-Bai,Li Wen-Lai,Wang Long,
冯春华
,李赞良,杨宣宗,郑少白,李文莱,王龙

中国物理 B , 2003,
Abstract: The poloidal rotation velocity of neutral hydrogen atoms is measured using the Doppler shift of the Hα spectral line emitted in the CT-6B tokamak. The poloidal rotation of hydrogen atoms is generated through the collisions and charge-exchanges with main ions (protons). Therefore, the rotation direction of main ions can be deduced from that of neutral hydrogen atoms. The experimental results show that the main ions rotate in the electron diamagnetic drift direction, the same as the impurity ions, in the plasma core. The neutral hydrogen atoms rotate also in the electron diamagnetic drift direction in the edge region of the plasma. However, the rotation direction of main ions in the edge region cannot be judged from the experimental result due to the long mean free path of hydrogen atoms in the edge region. An inward diffusion flux of hydrogen atoms toward the torus inside with a velocity of the same order of magnitude as their poloidal rotation is also observed.
ELECTRON CYCLOTRON CURRENT START-UP FOR OHMIC DISCHARGE ON CT-6B TOKAMAK

FENG CHUN-HUA,YAO XIN-ZI,JIANG DI-MING,QI XIA-ZHI,JIANG DE-YI,LI ZAN-LIANG,WANG LONG,ZHENG SHAO-BAI,

中国物理 B , 1997,
Abstract: Electron cyclotron current start-up as a scheme to initiate ohmic discharges has been investigated with two circuits of open and shorted primary windings of transformer. The experimental results indicate that we can achieve the saving of equivalent flux and the reduction of starting voltage in the initial phase for the two circuits in fundamental frequency resonance region.
MICROWAVE PREIONIZATION PLASMA IN A TOKAMAK
托卡马克微波预电离等离子体

WANG LONG,LUO YAO-QUAN,LI ZAN-LIANG,WANG WEN-SHU,YANG SI-ZE,LI WEN-LAI,QI XIA-ZHI,ZHAO HUA,
王龙
,罗耀全,李赞良,王文书,杨思泽,李文莱,戚霞枝,赵华

物理学报 , 1989,
Abstract: A currentless plasma has been obtained in a tokamak device using a powerful microwave at electron cyclotron frequency generated by gyrotron systems. Its electron density is up to 8×1012cm-3; the electron temperature is up to 50 eV; the particle confinement time is about. 0.5ms; the heating efficiency is above 25%. The effect of the plasma on the toroidal breakdown and the heating mechanism have been studied.
ELECTRON CYCLOTRON WAVE HEATING EXPERIMENT ON CT-6B TOKAMAK
CT-6B托卡马克的电子迴旋波加热实验

LUO YAO-QUAN,WANG LONG,YANG SI-ZE,CHEN YAN-PING,QI XIA-ZHI,LI ZAN-LIANG,WANG WEN-SHU,LI WEN-LAI,ZHAO HUA,TANG JI-HUI,TAN FU-CHUAN,
罗耀全
,王龙,杨思泽,陈雁萍,戚霞枝,李赞良,王文书,李文莱,赵华,唐继辉,谭富传

物理学报 , 1990,
Abstract: Obvious heating effects have been observed in RF heating experiments on CT-6B tokamak, in which microwave beams of frequencies 34.34 GHz and 20.1 GHz generated by two gyrotron systems were launched from top and outside of the device, respectively. It is shown that these heating effects arise becouse of the different heating mechanisms. The former is due mainly to the resonance heating of O mode. The latter belongs to down shift-over dense heating. Its heating mechanism may be the nonlinear phenomena occuring near the high density cut off layer of X mode. A kind of nonlinear heating phenomena (secondary heating) has been observed in two experiments, which may come from the different physical mechanisms.
Research of Big Data Based on the Views of Technology and Application  [PDF]
Zan Mo, Yanfei Li
American Journal of Industrial and Business Management (AJIBM) , 2015, DOI: 10.4236/ajibm.2015.54021
Abstract: In the era of big data, large amounts of data affect our work, life and study, even national economic development. It provides a new way of thinking and approaches to analyze and solve problems, which gradually becomes a hot research. Based on describing the concept and characteristics of big data, this paper describes the development of technologies in big data analysis and storage and analyses the trends and different values in commercial applications, manufacturing, biomedical science and other applications. At last, the authors sum up the existent challenges of big data applications and put forward the view that we should deal with big data challenges correctly.
Soil fungi of three native tree species inhibit biomass production and shift biomass allocation of invasive Mikania micrantha Kunth
Lei Gao,QiJie Zan,MingGuang Li,Qiang Guo,Liang Hu,Lu Jiang,Sheng Zhou,HaiJun Liu
Chinese Science Bulletin , 2013, DOI: 10.1007/s11434-012-5394-6
Abstract: Soil microbes contribute to native plant species successful resistance against invasive plant. Three native tree species, Heteropanax fragrans (HF), Cinnamomum burmanii (CB), and Macaranga tanarius (MT) were effective in controlling the notorious invasive vine Mikania micrantha (MM). Biomass production and allocation patterns (shoot/root biomass ratio (shoot/root)) are important indicators of MM climbing coverage and competitive light-capturing capacity. An investigation was conducted to test the role of soil microbes associated with the three native tree species to inhibit MM biomass production and shift MM shoot/root. Rhizosphere soils originating from preculture HF, CB, MT, and MM plots were collected separately for use as inocula. The inocula were mixed with sterilized river sand at a 1:9 (w/w) ratio to grow MM. The fungicide carbendazim (methyl benzimidazol-2-ylcarbamate) was applied to half the treatments to kill pathogenic soil fungi. Two nutrient levels were established based on the natural soil nutrient concentration from a field stand invaded by MM. MM were grown from seeds in a glasshouse, harvested 15 weeks after sowing, and separated into shoot and root portions. Results showed that under interaction of soil origin and nutrient levels, MM biomass production was unchanged, but biomass allocation patterns were significantly different. MM biomass production grown in the three native tree soils under two nutrient levels was similar or higher than MM biomass production in MM conspecific soil, indicating the absence of species-specific pathogens that inhibited MM biomass production in native tree soils. However, in both conspecific and tree soils, MM biomass production was significantly reduced in the presence of pathogenic soil fungi, i.e. MM experienced significant fungal inhibition, demonstrating the pathogenic soil fungi promoted native tree resistence to MM. MM exhibited decreased shoot biomass allocation when cultivated in native tree soil relative to MM conspecific soil under field stand nutrient level conditions. Reduced resource allocation to shoot biomass could result in diminished capacity to climb, cover, and subsequent smother to native trees, and reduced surface area exposed to available light. Following fungicide application, significant biomass allocation differences disappeared, suggesting the native tree soil fungi were responsible for decreasing MM shoot biomass. The overall results indicated tree soil fungi serve an integral role in controlling invasive MM through fungal inhibition on MM biomass production, and shifts in MM biomass allocation patterns.
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