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System validation of CO2-laser-based phase contrast imaging on HL-2A tokamak

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Chinese Optics Letters 2018年第12期16卷 31-36页

作者： Yi Yu Shaobo Gong Min Xu Boda Yuan Yifan Wu Lin Nie Rui Ke minyou Ye Xuru Duan School of Physics University of Science and Technology of ChinaHefei 230026China Southwestern Institute of Physics Chengdu 610041China

System validation and density fluctuation calibration of phase contrast imaging(PCI) on an HL-2 A tokamak are presented. Signals from different channels show not only a pronounced modulation of an incident laser beam induced by a sound wave, but also an excellent magnification and low image distortion of optics. The frequencywavenumber spectrum is achieved by using two-dimensional Fourier transform of time series signals. The conversion coefficient between detected signal amplitude and chord integral plasma density fluctuation is 2.35 × 1013m-2/mV, which promises a suitable signal level at the order of volts of the PCI in typical HL-2 A discharges.

关键词： System validation of CO2-laser-based phase contrast imaging on HL-2A tokamak PCI HL CO

Study of nonlinear mode–mode couplings between Alfvénic modes by the Fourier bicoherence and Lissajous-curve technique in HL-2A

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Plasma Science and Technology 2019年第7期21卷 97-105页

作者： Yumei HOU Wei CHEN Yi YU Xuru DUAN Min XU minyou YE HL-2A Team School of Physical Sciences University of Science and Technology of ChinaHefei 230026People’s Republic of China Southwestern Institute of Physics Chengdu 610041People’s Republic of China

Nonlinear couplings of various Alfvén modes driven by energetic particles in HL-2 A are addressed by employing the Fourier bicoherence and Lissajous-curve technique. Long-lived modes and high-frequency coherent modes are presented. Then the squared bicoherence of three waves establishes the existence of three-wave coupling. Lissajous-curves of those waves manifest that their phases are locked, which again confirms that they are nonlinearly coupled to each other. Moreover, coupled modes triggered by supersonic molecular beam injection are investigated. The phase evolution of them is given by the Lissajous-curve. Further details of phase-flip and phase-slip are presented and discussed.

关键词： nonlinear mode-mode coupling Alfvén modes Fourier bicoherence Lissajous-curve

Investigation of ion fishbone stability on HL-2A using NIMROD

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Plasma Science and Technology 2019年第8期21卷 18-26页

作者： Yaorong YANG Yawei HOU Wei CHEN Ping ZHU Xianqu WANG Zhihui ZOU Yi YU Min XU) and minyou YE Department of Engineering and Applied Physics School of Physical SciencesUniversity of Science andTechnology of ChinaHefei230026People’s Republic of China Southwestern Institute of Physics Chengdu610041People’s Republic of China CAS Key Laboratory of Geospace Environment and Department of Engineering and Applied Physics University of Science and Technology of ChinaHefei230026People’s Republic of China KTX Laboratory and Department of Engineering and Applied Physics University of Science andTechnology of ChinaHefei230026People’s Republic of China Department of Engineering Physics University of Wisconsin-MadisonMadisonWisconsin53706United States of America Southwest Jiaotong University Chengdu610031People’s Republic of China

Numerical calculations of resistive internal kink mode with effects of energetic particles(EPs) on HL-2A have been performed using the hybrid kinetic-MHD model inplemented in the NIMROD *** m/n=1/1 resistive internal kink mode is unstable in MHD ***, with kinetic effects of energetic ions, a fishbone mode is excited with mode frequency around 10 *** calculate the impact of resistivity on the growth rate and frequency of ion fishbone mode,and the results are in good agreement with the analytic solutions, which are obtained by solving the fishbone dispertion relation including resistivity *** effects of βfracand cut off velocity of EP on fishbone mode are calculated in detail, where βfracis the ratio of EP pressure to background plasma *** work presents a clear explanation of the stabilizing effect of ECRH on ion fishbone, which is first observed on HL-2A.

关键词： energetic particles fishbone mode hybrid simulation

基于指纹图谱结合化学计量学的不同产地首乌藤标准汤剂研究

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广东化工 2024年第6期51卷 127-130页

作者：王利伟何民友邓淙友官永河李国卫曹斯琼广东一方制药有限公司/广东省中药配方颗粒企业重点实验室广东佛山528244

目的:通过指纹图谱结合聚类分析等统计学方法针对首乌藤标准汤剂质量标准,探究不同产地首乌藤标准汤剂的差异成分,为其质量标准制定提供据。方法:首先通过前处理考察得到的最佳指纹图谱制样方法,标定20批首乌藤标准汤剂的指纹图谱共有峰... 详细信息

目的:通过指纹图谱结合聚类分析等统计学方法针对首乌藤标准汤剂质量标准,探究不同产地首乌藤标准汤剂的差异成分,为其质量标准制定提供据。方法:首先通过前处理考察得到的最佳指纹图谱制样方法,标定20批首乌藤标准汤剂的指纹图谱共有峰,然后结合《中药色谱指纹图谱相似度评价系统》(2012版)评价各共有峰相似度,最后结合化学模式识别方法,筛选出不同产地的差异性标志物。结果:20批首乌藤标准汤剂含有8个共有峰,其相似度评价值均在0.85以上,其中共指认出4个色谱峰;通过聚类分析和主成分分析将20批样品分为4类,同产地样品为一类;根据偏最小二乘法判别分析(OPLS-DA)分析筛选可知,不同产地的主要差异标志物分别是峰1(2,3,5,4’-四羟基二苯乙烯-2-O-β-D-葡萄糖苷)、6、7(大黄素)、8(大黄素甲醚)。结论:本研究所建立的指纹图谱方法及差异性标志物的研究可为首乌藤标准汤剂及其制剂的质量标准的提升提供参考。

关键词：首乌藤标准汤剂指纹图谱化学计量学高效液相色谱

An Approach of Developing Expert System in Support of Database Management System

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Wuhan University Journal of Natural Sciences 1997年第4期2卷 71-74页

作者： Yang Kaiying Chen Shuzhen Zhang minyou

A method of how to describe expert system using relative data model and the realization of inference using data search in support of database management system is introduced in this ***,the database system is promoted from data processing up to knowledge processing,and a practical method of how to develop expert system using the popular database developing tools is proposed.

关键词： database expert system knowledge base

Comparison of the efficacy of electroacupuncture Bǎihuì(百会GV 20) and Yìntáng (印堂EX-HN3) and western medicine in treating depression post-schizophrenia

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World Journal of Acupuncture-Moxibustion 2018年第1期28卷 10-14,I0002页

作者： Huipeng LU Peizhen MA minyou CAO Zhongshan Third People’s Hospital Zhongshan 528451 Guangdong Province China

Objective： To observe the clinical efficacy difference between electroacupuncture at Bǎihui（百会GV 20）and Yintáng（印堂EX-HN 3） and oral administration of sertraline hydrochloride for treatment of postschizophrenic ***： Sixty patients with post-schizophrenic depression were randomly divided into electroacupuncture group and western medicine group in the proportion of 1：1, with 30 patients in each group. The patients in the two groups were all given antipsychotics as the basic treatment. Electroacupuncture at GV 20 and EX-HN 3 was performed additionally in electroacupuncture group with 30 min/time and once every other day. The treatment was given for 3 times a week, lasting for 6 weeks. Oral administration of sertraline hydrochloride was given in western medicine group additionally for once a day, lasting for6 weeks. The comprehensive conditions of patients in the two groups were evaluated before and after treatment by adopting Global Assessment Scale（GAS）. The degree of depression of patients in the two groups was assessed before treatment, after treatment for 1 week, 2 weeks and 4 weeks, after treatment as well as during follow-up visit by adopting Hamilton Depression Scale-17（HAMD-17）.Results： GAS： GAS scores of the patients in the two groups after treatment were higher than those before treatment（both P〈0.05）, but the difference of GAS scores of the patients in the two groups after treatment was not statistically significant. HAMD-17： The HAMD-17 scores of patients in electroacupuncture group reduced gradually in the six time points of before treatment, after treatment for 1 week, 2 weeks and 4 weeks, after treatment as well as during follow-up visit, and the differences of scores between the two adjacent time points were statistically significant（all P〈0.05）. The HAMD-17 scores of patients in western medicine group reduced gradually in the 6 time points, and the differences of scores between the two adjacent time points among after treatment for 2 week

关键词： Schizophrenia Depression Electroacupuncture Baihui(百会GV 20) Yintang(印堂EX-HN 3) Sertraline hydrochloride

Optical design of the Lyman alpha based beam emission spectroscopy (LAB) diagnostic on the HL-2A tokamak

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Plasma Science and Technology 2021年第7期23卷 45-52页

作者： Yixuan ZHOU Huajie WANG Yi YU Yihang CHEN Rui KE Min XU Chijie XIAO Zhanhui WANG Jiquan LI Xuru DUAN minyou YE Southwestern Institute of Physics Chengdu 610041People’s Republic of China School of Nuclear Science and Technology University of Science and Technology of ChinaHefei 230026People’s Republic of China State Key Laboratory of Nuclear Physics and Technology School of PhysicsPeking UniversityBeijing 100871People’s Republic of China

In this article,we present the optical design of a novel diagnostic on the HL-2A tokamak,*** 20-channel edge Lyman-alpha beam emission spectroscopy,which is a promising solution for edge density turbulence research on tokamaks,as it offers the possibility of density fluctuation measurement with a 3.3 mm spatial resolution while maintains a high temporal resolution of 1μ*** optical path,including the reflective collection optics,the high-dispersion spectrometer,and the linear detector array,is carefully optimized to obtain a good image quality and a high *** maximum root mean square radius of the collection optics is 64μ*** detected photon flux is estimated to be about 1011 photons/s/channel.

关键词： Lyman-alpha line LAB BES density fluctuation diagnostic

Measurement of molybdenum ion density for L-mode and H-mode plasma discharges in the EAST tokamak

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Chinese Physics B 2020年第6期29卷 333-338页

作者： Yongcai Shen Hongming Zhang Bo Lyu Yingying Li Jia Fu Fudi Wang Qing Zang Baonian Wan Pan Pan minyou Ye 不详 Institute of Plasma Physics Chinese Academy of SciencesHefei 230031China School of Mathematics and Physics Anqing Normal UniversityAnqing 246011China Department of Engineering and Applied Physics University of Science and Technology of ChinaHefei 230026China the EAST team

We report the measurement of total molybdenum ion density for L-mode and H-mode plasmas on EAST using spectral lines observation and calculation based on an impurity transport code.A flat-filed extreme ultraviolet spectrometer with some spatial resolution is used to obtain the radial profiles of molybdenum spectral line *** absolute calibration for the extreme ultraviolet spectrometer is finished by comparing the calculated bremsstrahlung intensity with the readings of CCD *** ion transport study is performed using the radial ion density profiles and one-dimensional impurity transport code *** total molybdenum density profiles are determined from the transport *** molybdenum density during L-mode and H-mode phases are obtained,which are about 3 and 4 orders of magnitude smaller than the electron density,*** inward pinch is found during the H-mode phase that leads to the peaked profile of molybdenum density.

关键词： EAST EUV spectroscopy molybdenum density L-mode and H-mode

Fast estimation of ion temperature from EAST charge exchange recombination spectroscopy using neural network

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Plasma Science and Technology 2019年第10期21卷 28-32页

作者： Baoyue CHAI Yingying LI Ze CHEN Wei TAO Yixuan ZHOU Shifeng MAO Zhengping LUO Yi YU Bo LV minyou YE Department of Engineering and Applied Physics University of Science and Technology of ChinaHefei 230026People’s Republic of China Institute of Plasma Physics Chinese Academy of SciencesHefei 230031People’s Republic of China

Ion temperature, as one of the most critical plasma parameters, can be diagnosed by charge exchange recombination spectroscopy (CXRS). Iterative least-squares fitting is conventionally used to analyze CXRS spectra to identify the active charge exchange component, which is the result of local interaction between impurity ions with a neutral beam. Due to the limit of the time consumption of the conventional approach (~100 ms per frame), the Experimental Advanced Superconducting Tokamak CXRS data is now analyzed in-between shots. To explore the feasibility of real-time measurement, neural networks are introduced to perform fast estimation of ion temperature. Based on the same four-layer neural network architecture, two neural networks are trained for two central chords according to the ion temperature data acquired from the conventional method. Using the TensorFlow framework, the training procedures are performed by an error back-propagation algorithm with the regularization via the weight decay method. Good agreement in the deduced ion temperature is shown for the neural networks and the conventional approach, while the data processing time is reduced by 3 orders of magnitude (~0.1 ms per frame) by using the neural networks.

关键词： CXRS neural network ion temperature EAST