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The study of estimation method of broadband emissivity from EOS/MODIS data

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High Technology Letters 2014年第1期20卷 88-91页

作者：毛克彪 Ma Ying Shen Xinyi Sun Zhiwen he tianjue Xia Lang Xu Tongren National Hulunber Grassland Ecosystem Observation and Research Station Institute of Agricultural Resources and Regional PlanningChinese Academy of Agricultural Sciences Guangzhou Institute of Geography Department of Geography University of Toronto Hydrometeorology and Remote Sensing Laboratory The University of Oklahoma Institute No.503 of China Academy of Space Technology State Key Laboratory of Remote Sensing Science School of GeographyBeijing Normal University

The broadband emissivity is an important parameter for estimating the energy balance of the Earth. This study focuses on estimating the window （8 -12 μm） emissivity from the MODIS （mod- erate-resolution imaging spectroradiometer） data, and two methods are built. The regression method obtains the broadband emissivity from MODllB1 - 5KM product, whose coefficient is developed by using 128 spectra, and the standard deviation of error is about 0.0118 and the mean error is about O. 0084. Although the estimation accuracy is very high while the broadband emissivity is estimated from the emissivity of bands 29, 31 and 32 obtained from MOD11B1 _ 5KM product, the standard deviations of errors of single emissivity in bands 29, 31, 32 are about 0.009 for MOD11B1 5KM product, so the total error is about O. 02 and resolution is about 5km × 5km. A combined radiative transfer model with dynamic learning neural network method is used to estimate the broadband emis- sivity from MODIS 1B data. The standard deviation of error is about 0.016, the mean error is about 0.01, and the resolution is about 1 km x 1 km. The validation and application analysis indicates that the regression is simpler and more practical, and estimation accuracy of the dynamic learning neural network method is higher. Considering the needs for accuracy and practicalities in application, one of them can be chosen to estimate the broadband emissivity from MODIS data.

关键词： moderate-resolution imaging spectroradiometer (MODIS) broadband emissivity land surface temperature

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“中国式现代化”英译传播的知识话语内涵

外语教学 2024年第5期45卷 91-96页

作者：付添爵南昌大学外国语学院

语言的新陈代谢推动着社会思想的吐故纳新,而语言的翻译传播能够在异域催生新的知识建构与话语塑造,进而实现普遍性的思想联结。中国共产党第二十次全国代表大会提出了“中国式现代化”的新表述,其富含的知识话语内涵在相应的翻译传播... 详细信息

语言的新陈代谢推动着社会思想的吐故纳新,而语言的翻译传播能够在异域催生新的知识建构与话语塑造,进而实现普遍性的思想联结。中国共产党第二十次全国代表大会提出了“中国式现代化”的新表述,其富含的知识话语内涵在相应的翻译传播中得到了彰显。以“中国式现代化”英译为例,首先,其在“知识的翻译”层面以反思“现代性”为基础,明确了自身的地方性知识身份,表达了参与世界性知识建构的意愿;其次,作为现代性的话语构成物,“中国式现代化”英译在“翻译的知识”维度为其他文明形态提供了表达自我现代化发展的话语范式,力图为人类命运共同体的世界性建构贡献话语力量。

关键词：中国式现代化知识建构话语塑造现代性人类命运共同体

The present situation and the prospect of medical cyclotrons in China

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Science China(Physics,Mechanics & Astronomy) 2011年第S2期54卷 260-265页

作者： ZHANG tianjue FAN MingWu WEI SuMin CheN ShengZu YANG Fang China Institute of Atomic Energy(CIAE) Beijing 102413China Huazhong University of Science and Technology Wuhan 430074China Cancer Institute and Hospital Chinese Academy of Medical SciencesBeijing 100000China

The paper introduces the increasing applications of cyclotrons in the field of health care and some major work carried out abroad. Its emphasis is placed on the introduction to the application status and the development process of medical cyclotrons in China. The paper has assessed possible developing trends of medical cyclotrons based on the current application demand and the technological development status.

关键词： medical cyclotrons diagnosis therapy

The physics design of magnet in 14 MeV cyclotron

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Science China(Physics,Mechanics & Astronomy) 2011年第S2期54卷 266-270页

作者： ZHONG JunQing ZHANG tianjue LI Ming LV YinLong CUI Tao YANG JianJun XING JianSheng China Institute of Atomic Energy Beijing 102413China

The 14 MeV, 400 μA compact cyclotron is under construction at China Institute of Atomic Energy (CIAE). The design of main magnet and the result of beam dynamics in the cyclotron will be described in this paper, including the choice of main parameters of magnet, the method of shimming isochronous field in the compact cyclotron and optimization of the magnetic field in central region. The beam will be accelerated to 14.6 MeV by optimizing the magnet structure.

关键词： main magnet shimming isochronous field beam dynamics shape function

Research progress in high intensity cyclotron technology

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Chinese Science Bulletin 2009年第15期54卷 3931-3939页

作者： ZHANG tianjue FAN MingWu LI ZhenGuo CHU ChengJie China Institute of Atomic Energy (CIAE) Beijing 102413 China Huazhong University of Science and Technology (HUST) Wuhan 430074 China

This paper briefly introduces several major application fields of high intensity proton accelerators and compares the developing status of various types of proton accelerators currently available at home and abroad. Technical parameters of typical accelerators are specified. The technical features of high intensity cyclotrons are summarized and a general introduction is given to the 3 major phases of research and development on high intensity cyclotrons at CIAE. In the end, emphasis is laid on the recent research of critical technology of high intensity cyclotrons as well as its developing progress.

关键词：回旋加速器技术参数高强度原子能科学研究院质子加速器国内外

The design and construction of a pulsed beam generation system based on high intensity cyclotron

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Science China(Physics,Mechanics & Astronomy) 2011年第S2期54卷 210-213页

作者： AN ShiZhong YIN ZhiGuo LI PengZhan SONG GuoFang WU LongCheng GUAN FengPing XIE HuaiDong JIA XianLu LU YinLong ZHANG tianjue China Institute of Atomic Energy Beijing 102413China

In order to perform the studies on a pulsed beam generation system based on a high intensity cyclotron, a test beam line with a pulsed beam generation for a 10 MeV compact cyclotron (CYCIAE-10) has been designed and constructed at China Institute of Atomic Energy (CIAE). A 70 MHz continuous H- beam can be pulsed to the pulse length of less than 10 ns with a repetition rate of 4.4 MHz. The sine waveform with a frequency of 2.2 MHz is adopted for the chopper and a mesh structure with single drift and dual gaps is used for the 70 MHz buncher. A helical resonator is designed and constructed based on simulations and experiments on the RF matching for the chopper. A helical inductance loop that is exceptionally large of its kind and equipped with water cooling for the resonator has been successfully wound and a 500 W solid RF amplifier has been manufactured. A special measuring device has been designed, which can be used to measure both the DC beam and the pulsed beam. The required pulsed beam was obtained after pulsed beam tuning.

关键词： beam pulsing chopper buncher RF matching

利用接收函数方法研究中国东北东南部地区不同构造体的地壳特征

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地球物理学报 2019年第8期62卷 2899-2917页

作者：李天觉陈棋福中国科学院地质与地球物理研究所中国科学院地球与行星物理重点实验室北京100029 中国科学院地球科学研究院北京100029 中国科学院大学地球与行星物理学院北京100049

基于我们布设的探测深俯冲的中国东北地震台阵NECsaids台阵和固定地震台长时段的观测记录及NECESSArray流动台阵共计152个台站数据提取得到的33752条P波接收函数,采用H-κ叠加分析和共转换点(CCP)叠加成像等方法进行统一分析处理,并汇... 详细信息

基于我们布设的探测深俯冲的中国东北地震台阵NECsaids台阵和固定地震台长时段的观测记录及NECESSArray流动台阵共计152个台站数据提取得到的33752条P波接收函数,采用H-κ叠加分析和共转换点(CCP)叠加成像等方法进行统一分析处理,并汇集他人接收函数研究结果得到中国东北东南部地区迄今为止最高分辨率的地壳厚度和平均波速比分布图像.对中国东北东南部地区不同构造体的地壳特征综合分析研究表明:研究区不同陆块的地壳属性存在明显差别,张广才岭地块中南部的地壳厚度和波速比与华北克拉通东北缘相当,地壳厚度同地表地形之间显示有明显的正相关关系;松辽地块东南缘地壳最薄、波速比最高,地壳厚度同壳内波速比之间显示出明显的负相关关系;兴凯地块西部地区的地壳结构表现为稍厚的地壳厚度和研究区内最低的壳内波速比,其地壳厚度同壳内波速比之间亦显示出明显的负相关关系;佳木斯地块西南缘在具有“正常”的壳内波速比同时地壳最厚.研究区内的郯庐断裂带北延段在切穿其下Moho面的同时表现出南北分段的特征:北段(44.4°N—47°N)两分支之下的Moho面整体下凹,而南段(41.5°N—43.3°N)两分支之下的Moho面则整体上隆.长白山天池火山下方表现为Moho面下凹沉落及高壳内波速比特征,推测其壳内岩浆囊很可能存在于火山口东北隅至少10km的范围内.

关键词：中国东北接收函数 Moho面波速比郯庐断裂带北延长白山天池火山

The present situation and the prospect of medical cyclotrons in China

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The present situation and the prospect of medical cyclotrons...

High performance computation on beam dynamics problems in high intensity compact cyclotrons

第一届中国粒子加速器会议

作者： ZHANG tianjue FAN MingWu WEI SuMin CheN ShengZu YANG Fang China Institute of Atomic Energy(CIAE) Huazhong University of Science and Technology Cancer Institute and Hospital Chinese Academy of Medical Sciences

The paper introduces the increasing applications of cyclotrons in the field of health care and some major work carried out *** emphasis is placed on the introduction to the application status and the development process of medical cyclotrons in *** paper has assessed possible developing trends of medical cyclotrons based on the current application demand and the technological development status.

关键词： medical cyclotrons diagnosis therapy

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High performance computation on beam dynamics problems in hi...