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Progress of Lyman-alpha-based beam emission spectroscopy(Ly BES)diagnostic on the HL-2. tokamak

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Plasma Science and Technology 2024年第3期26卷 118-125页

作者：周艺轩余羿许敏柯锐聂林徐皓赵光义刘灏袁子豪肖晨雨李继全肖池阶 the HL-2. Team Southwestern Institute of Physics Chengdu 610041People's Republic of China Sino-French Institute of Nuclear Engineering and Technology Sun Yat-sen UniversityZhuhai 519082People's Republic of China State Key Laboratory of Nuclear Physics and Technology School of PhysicsPeking UniversityBeijing 100871People's Republic of China

An edge Lyman-alpha-based beam emission spectroscopy(LyBES)diagnostic,using a heating NBI(neutral beam injection)system,is currently under development on the HL-2. *** 2.-channel edge LyBES,which is intended to measure the density fluctuation in plasma edge(from R=1960 mm to R=2.2. mm)with an improved spatial resolution of 3.3 mm,is a complement to the existing conventional beam emission spectroscopy(BES)*** this article,we introduce the progress of LyBES diagnostic,including the collection optics,the monochromator,and the detector *** reflectance of the collection mirrors is measured to be~82.at 12. nm,and the aberration geometrical radius of the collection optics is tested to be~150μm in the aimed *** linear dispersion of the LyBES monochromator is designed to be~0.09 nm mm^(-1).The bandwidth of the detector system with the 5×10^(7)V A^(-1)preamplifier gain is measured to be~2.0 kHz,and the peak-to-peak noise of the detector system is tested to be~16 *** finalized design,components development and testing of the LyBES diagnostic have been completed at present,and an overall performance of the LyBES diagnostic is to be confirmed in the next HL-2. campaign.

关键词： density fluctuation Ly BES BES vacuum ultraviolet

Pattern phenomena in an rf discharge dusty plasma system

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Science china(Physics,Mechanics & Astronomy) 2006年第5期49卷 588-596页

作者： HUANG Feng1,2. YE Maofu2.& WANG Long2.1. College of Science, china Agricultural University, Beijing 100083, china 2. Institute of Physics, Chinese Academy of Sciences, Beijing 100080, china College of Science China Agricultural University Beijing China Institute of Physics Chinese Academy of Sciences Beijing China

Various dust patterns are observed in an rf discharge dusty plasma system. According to the dust growth process from small to large in size, the formation of different dust patterns can be divided into two stages: the small-particle stage (or dust cloud stage), and the large-particle stage (or dust crystal stage). The evolution relations between different dust patterns with gas pressure changing are investigated. Dust voids, dust acoustic waves and strong turbulence modes are presented at the small-particle stage. The self-organized dust lattices and dust clusters are investigated at the large-particle stage. The static structure of a dust lattice is characterized by means of the pair correlation function. Dust clusters formed by particles with different numbers and the regular evolution of the clusters with gas pressure are also investigated. The packing sequences of dust clusters are verified through two-dimensional confined molecular dynamics simulations.

关键词： dusty plasma dust patterns

山东省统计局国家统计局山东调查总队关于印发《山东省统计行政处罚裁量基准》的通知(鲁统字〔2.2.〕151号)

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山东省人民政府公报 2024年第2期 143-149页

作者： 1.山东省统计局 2.国家统计局山东调查总队山东省统计局国家统计局山东调查总队

SDPR-2.2.-032.002.市、县统计局,各市、县国家调查队:现将《山东省统计行政处罚裁量基准》印发给你们,请加强学习宣传,严格遵照执行。2.2.年12.2.日山东省统计行政处罚裁量基准第一条为规范统计行政处罚自由裁量权,根据《中华人民共... 详细信息

SDPR-2.2.-032.002.市、县统计局,各市、县国家调查队:现将《山东省统计行政处罚裁量基准》印发给你们,请加强学习宣传,严格遵照执行。2.2.年12.2.日山东省统计行政处罚裁量基准第一条为规范统计行政处罚自由裁量权,根据《中华人民共和国统计法》(以下简称《统计法》)、《中华人民共和国行政处罚法》《中华人民共和国统计法实施条例》及相关法律法规规章,制定本裁量基准。

关键词：国家统计局裁量基准行政处罚自由裁量权学习宣传统计法相关法律法规实施条例《统计法》

Static mechanics analysis of no bumping or vibration welding structure applied in high-speed & heavy-load CWR with single inclined surface

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Science china(Technological Sciences) 2010年第12期53卷 3153-3160页

作者： SONG YuQuan1, LUO WuWei2.& TAO Yi2.1 Jilin University, Changchun 13002., china 2.Shenyang Railway bureau, Shenyang 110013, china Jilin University Changchun China Shenyang Railway bureau Shenyang China

Nowadays, the sleeper, railroad bed, welding technology and materials of the high-speed & heavy-load Continuous Welded Rail (CWR) have been improved greatly. However, the orientation relationship between welding surface and rail is still orientation structure, which appeared 185 years ago in UK, namely, the welding surface is normal to the longitudinal direction of the rail. Thus rail welds are subject to vertical pure shear stress, lateral pure shear stress and axial pure tensile stress. Pure shear stress and pure tensile stress are both dangerous stresses, which result in failure of welds under high-speed & heavy-load condition for a long time. When the wheels pass rail welds, it is difficult to avoid vertical bumping and lateral vibration. In order to solve these problems, in this paper we put forward the single inclined welding surface having dip angle α with the lateral rail or dip angle β with the vertical rail and analyze the position geometry and stress state. Thus the vertical bumping and lateral vibration are basically eliminated, then the bearing capacity of the welding surface is significantly improved, and the stress of axial pure tensile and lateral pure shear of the welding surface is reduced.

关键词： continuous welded rail single inclined welding surface bearing capacity stress state regularity

Distribution and characteristics of gravelly soil liquefaction in the Wenchuan M_s 8.0 earthquake

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Earthquake Engineering and Engineering Vibration 2010年第2期9卷 167-175页

作者： Cao Zhenzhong1,Hou Longqing2.Xu Hongmei2.and Yuan Xiaoming1 1. Institute of Engineering Mechanics,china Earthquake Administration,Harbin 150080,china 2. East{2. Institute of Technology,Fuzhou 344000,china Institute of Engineering Mechanics China Earthquake Administration Harbin China East china Institute of Technology Fuzhou China Institute of Engineering Mechanics Chinese Earthquake Administration Harbin China

In this paper,a distribution map of gravelly soil liquefaction that was caused by the Wenchuan M8.0 earthquake in china is proposed based on a detailed field investigation and an analysis of geological soil profiles. The geological background of the earthquake disaster region is summarized by compiling geological cross sections and borehole logs. Meanwhile,four typical liquefied sites were selected to conduct sample drillings,dynamic penetration tests (DPT),and shear wave velocity tests,to understand the features of liquefied gravelly soil. One hundred and eighteen (118) liquefied sites were investigated shortly after the earthquake. The field investigation showed:(1) sandboils and {2.spouts occurred extensively,involving thousands of miles of farmland,12. villages,eight schools and five factories,which caused damage to some rural houses,schools,manufacturing facilities and wells,etc.; (2. the Chengdu plain is covered by a gravelly soil layer with a thickness of 0 m to 541 m according to the geological cross sections; (3) there were 80 gravelly soil liquefied sites in the Chengdu plain,shaped as five belt areas that varied from 2. km to 40 km in length,and about ten gravelly soil liquefied sites distributed within Mianyang area; and (4) the grain sizes of the sampled soil were relative larger than the ejected soil on the ground,thus the type of liquefied soil cannot be determined by the ejected soil. The gravelly soil liquefied sites are helpful in enriching the global database of gravelly soil liquefaction and developing a corresponding evaluation method in further research efforts.

关键词： gravelly soil liquefaction borehole soil profile geological cross section grain size distribution Wenchuan earthquake

坚持“三个聚焦、三个注重” 推动新时代重庆青联改革走深走实

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中国共青团 2024年第9期 53-54页

作者： 1.团重庆市委 2.重庆市青年联合会团重庆市委重庆市青年联合会

《新时代深化全国青联改革实施方案》印发以来,重庆共青团聚焦青年统战工作重点对象、重要领域,不断加强自身建设,提升工作实效,务实推动青联改革走深走实、见行见效。聚焦顶层设计,注重“四个强化”,推动改革方案精准谋划、有的放矢。... 详细信息

《新时代深化全国青联改革实施方案》印发以来,重庆共青团聚焦青年统战工作重点对象、重要领域,不断加强自身建设,提升工作实效,务实推动青联改革走深走实、见行见效。聚焦顶层设计,注重“四个强化”,推动改革方案精准谋划、有的放矢。对标全国青联改革实施方案和市委有关要求,重庆共青团积极担当作为,确保各项改革部署落地不走样、实施有成效。

关键词：改革实施方案顶层设计全国青联共青团不走样改革方案四个强化工作实效

Computational theory of cavitating flows for hydraulic turbomachinery with consideration of influence of water quality

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Science china(Technological Sciences) 2010年第12期53卷 3341-3348页

作者： WANG Lei1,2.& CHANG JinShi2.1 Huadian Electric Power Research Institute, Hangzhou 310030, china 2.College of water Conservancy and Civil Engineering, china Agricultural University, Beijing 100083, china Huadian Electric Power Research Institute Hangzhou China College of water Conservancy and Civil Engineering China Agricultural University Beijing China

Previously it was assumed that the pressure within the cavity or on the cavity surface remained constant and the vapor pressure of clean water at 2.°C and 0 m altitude was utilized as the computational boundary for cavitating flows in hydraulic turbomachinery. Cavitation was confused with vaporization, and the effect of water quality on cavitation pressure characteristics was not taken into account. In recent years, lots of experiments of cavitation pressure characteristics of different water qualities including different sand concentrations of sand water and different altitudes of clean water have been performed by the authors, and the important influences of water quality on cavitation pressure characteristic have been validated. Thus the water quality should be involved in the cavitating flows computation. In the present paper, the effect of water quality on the cavitation pressure characteristic is analyzed and the computational method and theory of cavitating flows for hydraulic turbomachinery that considers the influence of water quality are proposed. The theory is suitable for both the potential flow method and the two-phase flow method for cavitating flows simulation. Finally, the validation results for cavitating flows in a hydraulic tur- bine indicate the significant influences of water quality on the cavitating flow performance.

关键词： cavitating flows cavitation pressure water quality hydraulic turbomachinery

气动磁镜实验装置ALIANCE-T ICRH天线的初步设计

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核聚变与等离子体物理 2024年

作者：张克卿曾秋孙郁杰 1.中国科学院合肥物质科学研究院 2.中国科学技术大学

介绍了气动磁镜实验装置(ALIANCE-T)的离子回旋共振加热(ICRH)系统天线的初步设计方案。目的是进一步提高等离子体参数和约束；采用了有限元分析软件COMSOL计算磁场分布，并据此确定ICRH慢波加热天线的共振频率和发射位置；通过HFSS天... 详细信息

介绍了气动磁镜实验装置(ALIANCE-T)的离子回旋共振加热(ICRH)系统天线的初步设计方案。目的是进一步提高等离子体参数和约束；采用了有限元分析软件COMSOL计算磁场分布，并据此确定ICRH慢波加热天线的共振频率和发射位置；通过HFSS天线仿真得到天线本身的阻抗，并结合数值计算得到等离子体的阻抗，从而设计相应的匹配电路。ICRH天线初步设计将为ALIANCE-T辅助加热提供合理的方案建议。

关键词：离子回旋共振加热气动磁镜天线仿真等效阻抗计算

Application of rock creep experiment in calculating the viscoelastic parameters of earth medium

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Science china Earth Sciences 2006年第5期49卷 492-498页

作者： SHI Xingjue1, WEN Dan1, BAO Xueyang1, LI Chengbo1 & HUANG Yun2.1. School of Earth and Space Sciences, University of Science and Technology of china, Hefei 2.002., china 2. Seismological {2. of Jiangsu Province, Nanjing 2.0014, china School of Earth and Space Sciences University of Science and Technology of China Hefei China Seismological bureau of Jiangsu Province Nanjing China

Based on the rock creep experiment, the data of aftershock sequence and post-earth- quake deformation are used to estimate the viscosity of crust medium near earthquake focus. Firstly 9 samples that belong to 3 kinds of rock are conducted in creep experiment under constant pressure to obtain the creep curves directly. Inversion results show that the standard linear model is the best one to present the earth medium. It exhibits obvious elasticity within a short time, while it exhibits obvious rheology within a long time. The relationship between element module μ 2.and the whole module μ of standard linear model or the module of real earth medium is calculated and analyzed. On the basis of μ 2.= 2. μ, the sequence of aftershock of Gonghe earthquake in Qinghai Province is analyzed and the relationship between accumulated released strain and the time is obtained, which, combined with the creep experiment results, is used to estimate the viscosity of crustal medium in this area. The measured vertical deformation after the same earthquake also is combined with the creep experiment results, then it is used to calculate the relaxation time and viscosity through three different methods respectively, i.e. inversion of Kelvin model, difference method of deformation and viscoelastic dislo- cation theory. The viscosity of crustal medium in 32.km depth of earthquake focus of Gonghe area deduced from the different data and methods is about 1019 Pa·s, which is the same as the research results by other authors at home and abroad.

关键词： creep experiment, aftershock sequence, post-earthquake deformation, crustal viscosity.