检索结果-南通市图书馆

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

风云三号E星空间环境载荷综合探测技术

北京大学学报（自然科学版） 2024年第1期60卷 145-156页

作者：沈国红黄聪张鹏飞张效信王金华李佳薇宗位国张珅毅张贤国孙越强杨勇张焕新邹鸿王劲东孙莹白超平田峥中国科学院国家空间科学中心北京100190 北京市空间环境探测重点实验室北京100190 中国气象局国家卫星气象中心北京市空间天气重点实验室北京100081 许健民气象卫星创新中心北京100081 上海卫星工程研究所上海201109 北京大学地球与空间科学学院北京100871

针对中国风云三号卫星运行的低地球太阳同步轨道,开展空间环境及粒子辐射效应监测,提出基于空间环境监测器Ⅱ型载荷的综合探测技术。在各载荷技术指标的地面研制过程中,通过标准放射源、等效信号源、粒子加速器和标准磁场等不同方式进... 详细信息

针对中国风云三号卫星运行的低地球太阳同步轨道,开展空间环境及粒子辐射效应监测,提出基于空间环境监测器Ⅱ型载荷的综合探测技术。在各载荷技术指标的地面研制过程中,通过标准放射源、等效信号源、粒子加速器和标准磁场等不同方式进行标定和实验验证。结果表明,多方向全能谱粒子探测的能量范围为30 keV~300 MeV,精度优于10%;磁场强度测量范围为-65023~+65023 nT,精度优于0.73 nT;电位探测范围为-32.4~+23.7 kV,灵敏度优于10 V;辐射剂量探测范围为0~3×10^(4) rad(Si),灵敏度优于8.3 rad(Si)。通过空间环境监测器Ⅱ型载荷对卫星运行轨道上的粒子辐射环境、原位磁场矢量变化、辐射剂量累积以及卫星表面电位变化等进行观测,可以为航天活动、卫星设计、空间科学研究及空间天气预警预报业务提供必要的数据支撑。

关键词：空间环境粒子探测电位探测辐射剂量磁场探测

维普期刊数据库博看期刊

软土地层大断面矩形顶管施工诱发既有结构变形特性研究

在线全文

学校读者我要写书评

暂无评论

河北工程大学学报（自然科学版） 2024年第4期41卷 1-8页

作者：章莘苡王超张宇轩贾鹏蛟苏州大学轨道交通学院江苏苏州215000 中铁上海工程局集团华海工程有限公司上海201101

为研究矩形顶管穿越软土地层诱发既有结构变形特性,进一步弄清软土地层中顶管施工引起的变形规律,依托南京某出入口顶管工程,首先开展了矩形顶管施工现场试验,分析了矩形顶管下穿桥基和管线引起的地表及结构变形规律。在此基础上,考虑... 详细信息

为研究矩形顶管穿越软土地层诱发既有结构变形特性,进一步弄清软土地层中顶管施工引起的变形规律,依托南京某出入口顶管工程,首先开展了矩形顶管施工现场试验,分析了矩形顶管下穿桥基和管线引起的地表及结构变形规律。在此基础上,考虑地层损失对结构变形的影响,构建了矩形顶管动态顶进数值分析模型,分析了土体收缩率、箱涵与顶管间距和掌子面压力对既有结构变形的影响规律。研究结果表明:随着顶管管节逐级推进,地表横截面与管线呈现中间沉降大、两侧轻微隆起的变形特征,桥基变形特征主要表现为背离管节方向发生偏移;相较于箱涵与顶管间距和掌子面压力,土体收缩率变化对既有结构变形的影响最大。

关键词：矩形顶管软土地层既有结构地表沉降结构变形

Proton belt variations traced back to Fengyun-1C satellite observations

在线全文

学校读者我要写书评

暂无评论

Earth and Planetary Physics 2020年第6期4卷 611-618页

作者： ChunQin Wang Zheng Chang XiaoXin zhang GuoHong Shen shenyi zhang YueQiang Sun JiaWei Li Tao Jing HuanXin zhang Ying Sun BinQuan zhang National Space Science Center Chinese Academy of SciencesBeijing 100190China Beijing Key Laboratory of Space Environment Exploration Beijing 100190China Environmental Space Situation Awareness-SSA Beijing 100190China National Center for Space Weather China Meteorological AdministrationBeijing 100081China

We used historical data to trace trapped protons observed by the Fengyun-1C(FY-1C)satellite at low Earth orbits(~800 km)and chose data at 5–10 MeV,10–40 MeV,40–100 MeV,and^100–300 MeV from 25 March to 18 April 2000 to analyze the proton *** one isolated strong storm was associated with a solar proton event during this period,and there was no influence from previous proton *** dynamic phenomena of proton trapping and loss were affected by this disturbance differently depending on the energy and L *** flux of 5–10 MeV protons increased and created new trapping with a maximum at L^2.0,and the peak flux was significantly higher than that at the center of the South Atlantic ***,at higher L,the flux showed obvious loss,with retreat of the outer boundary from L^2.7 to L^*** increase in the 10–40 MeV proton flux was similar to that of the 5–10 MeV flux;however,the peak flux intensity was lower than that at the center of the South Atlantic *** loss of the 10–40 MeV proton flux was closer to the Earth side,and the outer boundary was reduced from L^2.3 to L^*** the higher energy protons of 40–100 MeV and 100–300 MeV,no new trapping was *** of the 40–100 MeV protons was observed,and the outer boundary shifted from L^2.0 to L^*** was not obvious for the 100–400 MeV protons,which were distributed within L<*** proton trapping was more likely to be created at lower energy in the region of solar proton injection by the strong magnetic storm,whereas loss occurred in a wide energy range and reduced the outer boundary on the Earth *** dynamic changes were observed by the NOAA-15 satellite in the same period,but the FY-1C satellite observed more complex changes in lower energy *** results revealed that the dynamic behavior of protons with different L-shells was due to differences in the pitch *** mechanisms related to new trapping and loss are also *** mechanisms ar

关键词： high-energy proton trapping loss disturbance inner radiation belt

Super solar particle event around AD775 was found

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 2014年第22期59卷 2736-2742页

作者： Dazhuang Zhou Chi Wang Binquan zhang shenyi zhang Ping Zhou Yueqiang Sun Jinbao Liang Guangwu Zhu Ji Wu National Space Science Center Chinese Academy of Sciences

A rapid radiocarbon14C increase of 120/00in AD774–775 has been reported in cedar and oak tree *** far,the origin of the14C increase is still uncertain and the possible origin is either supernova or solar particle *** most possible origin of14C increase is strong solar flares and Coronal Mass Ejections(CMEs)with strong particles *** approaches to identify the strong historical solar particle events based on the rapid14C/10Be increase in tree/coral rings and ice cores,long duration strong auroras and geomagnetic storms are *** of the super auroras in AD775 was first found in a Chinese Chronicles Jiutangshu and it supports the views that the rapid14C increase and strong auroras around AD775 are most possibly caused by strong solar storms with intense particles *** was identified that the solar event around AD775 would be the strongest solar particle event in the past 11400 *** discovery is significant for the research on the history of solar activities,space weather and forecast,radiation of solar energetic particles and protection.

关键词：太阳耀斑子事件日冕物质抛射太阳高能粒子粒子辐射太阳风暴 14C 放射性碳

Space Environment Measurements and Applications on the Tianhe Core Module of China Space Station

在线全文

学校读者我要写书评

暂无评论

空间科学学报 2022年第4期42卷 744-753页

作者： LIU Siqing SUN Yueqiang ZHONG Qiuzhen WEI Fei LIN Ruilin LI Zhitao REN Tingling LI Yongping zhang Xianguo zhang shenyi LUO Bingxian CHANG Zhen WANG Chunqin PENG Songwu AI Jiangzhao State Key Laboratory of Space Weather National Space Science CenterChinese Academy of SciencesBeijing 100190 Key Laboratory of Science and Technology on Environmental Space Situation Awareness Chinese Academy of SciencesBeijing 100190 University of Chinese Academy of Sciences Beijing 100049

Tianhe Core Module of China Space Station(CSS)equips a set of instruments consisting of a Particle Fluxes and Solar Activity Detector(PFSAD)and two Atmospheric Density Multi-directional Detectors(ADMDs).The PFSAD is to measure X-rays from the Sun and energetic particles in the low-latitude and low altitude regions,including electrons,protons,and helium *** ADMDs are to measure thermospheric atmospheric *** instruments provide real-time data of the orbital space environment,including solar flares,energetic particle variation and thermospheric density *** the data contribute to the CSS space weather service for mission control and astronaut’s *** paper gives preliminary analyses of the space environment measurements from the PFSAD and the *** further analysis,the 1024-channel fine spectra of the solar X-ray can be used to study the mechanism of solar flares and their impacts on the Earth’s *** accumulation will be helpful for analyzing mid-term and long-term variations of the South Atlantic Anomaly and atmosphere ***,the data are useful to calibrate previous empirical models and establish new models to study the space environment.

关键词： Space environment Tianhe core module China Space Station(CSS)

The geometric factor of high energy protons detector on FY-3 satellite

在线全文

学校读者我要写书评

暂无评论

Science China Earth Sciences 2014年第11期57卷 2558-2566页

作者： zhang shenyi zhang XianGuo WANG ChuiQin SHEN GuoHong JIN Tao zhang BinQuan SUN YueQiang ZHU GuangWu LIANG JinBao zhang XiaoXin LI JiaWei HUANG Cong HAN Ying Center for Space Science and Applied Research Chinese Academy of Sciences National Center for Space Weather Beijing Institute of Petrochemical Technology

Geometric factor is the key parameter for inversion of particle spectrum in space particle detection. Traditional geometric factor is obtained through the method of numerical calculation with the actual structure of the detector as the input condition. The degree of accuracy for data inversion is reduced since traditional geometric factor fails to take into account the physical process of interaction between the particle and substance as well as the influence of factors such as the particle interference between different energy channels on the measurement result. Here we propose an improved geometrical factor calculation method, the concept of which is to conduct actual structural modelling of the detector in the GEANT4 program, consider the process of interaction between the particle and substance, obtain the response function of the detector to particles of different energy channels through the method of Monte Carlo simulation, calculate the influence of contaminated particle on the geometrical factor, and finally get the geometrical factors for different energy channels of the detector. The imrpoved geometrical factor obtained through the method has carried out inversion for the data of high energy protons detector on China's FY-3 satellite, the energy spectrum after which is more in line with the power law distribution recognized by space physics. The comparison with the measured result of POES satellite indicates that the FY-3 satellite data are in good accordance with the satellite data, which shows the method may effectively improve the quality of data inversion.

关键词： geometrical factor response function particle radiation space detection FY-3

在线全文

学校读者我要写书评

暂无评论

太阳抵近探测计划——观测位置的新突破

上海航天（中英文） 2024年第5期41卷 1-10页

作者：林隽陆希陈雨豪黄帆张珅毅张艺腾周斌葛振华刘鎏田晖何建森程鑫陈鹏飞白先勇季海生刘佳佳张晓世中国科学院云南天文台云南昆明650216 中国科学院天文大科学研究中心北京100012 中国科学院大学天文与空间科学学院北京100049 云南省太阳物理与空间目标监测重点实验室云南昆明650216 上海卫星工程研究所上海201109 中国科学院国家空间科学中心北京100190 昆明理工大学材料科学与工程学院云南昆明650031 中国科学院微小卫星创新研究院上海201203 北京大学地球与空间科学学院北京100871 南京大学天文与空间科学学院江苏南京210093 中国科学院国家天文台北京100101 中国科学院紫金山天文台江苏南京210023 中国科技大学地球与空间科学学院安徽合肥230026 云南大学物理天文学院云南昆明650500

太阳抵近探测计划(SCOPE)旨在突破高温和强辐射防护、长距离运载、远距离轨道控制和先进载荷等一系列极限技术,将探测器投送至距太阳中心仅有5个太阳半径的位置上,深入太阳大气层进行探测,研究太阳附近极亮、极热的深空探测“无人区”,... 详细信息

太阳抵近探测计划(SCOPE)旨在突破高温和强辐射防护、长距离运载、远距离轨道控制和先进载荷等一系列极限技术,将探测器投送至距太阳中心仅有5个太阳半径的位置上,深入太阳大气层进行探测,研究太阳附近极亮、极热的深空探测“无人区”,在全新的位置上对太阳进行超近距离原位探测和遥感观测,针对磁场和等离子体结构实现空间分辨率优于0.1"的观测。探测器将穿越太阳爆发磁重联电流片,显微观测太阳爆发磁结构,原位探测磁重联电流片、日冕物质抛射与激波以及各类带电粒子,以推动揭示太阳爆发理论机理。探测器将在最靠近太阳的区域显微监测和探测日冕中尺度小于0.1"的纳耀斑、光球中尺度小于0.06"的磁场和速度场结构及其演化特征,确认日冕加热机制;探测太阳风重离子电荷态,确认太阳起源及加速机制。探测器还将在最接近太阳的区域内与原位探测日冕磁场,显微观测太阳极区磁场和等离子体结构和演化特征;揭示太阳附近尘埃分布特征,进入无尘埃区,确定太阳系尘埃盘内边界。困扰太阳物理界近百年的两个科学难题,即太阳爆发机理难题和日冕加热与太阳风加速机理难题,随着该计划的顺利实施将被破解;在最接近日心的位置处实现日冕磁场,包括太阳极区磁场原位探测“0到1”的突破也将实现。本文将介绍SCOPE的背景、科学目标和预期产出、有效载荷以及卫星平台关键技术。

关键词：太阳爆发磁场磁重联中高能粒子原位探测热防护深空通信

Cross-calibration of high energetic particles data——A case study between FY-3B and NOAA-17

在线全文

学校读者我要写书评

暂无评论

Science China(Technological Sciences) 2013年第11期56卷 2668-2674页

作者： WANG ChunQin zhang XianGuo LI JiaWei HUANG Cong zhang XiaoXin JING Tao SHEN GuoHong zhang shenyi CAO GuangWei SUN YueQiang LIANG JinBao ZHU GuangWu HAN Ying Center for Space Science and Applied Research Chinese Academy of Sciences University of Chinese Academy of Sciences National Satellite Meteorological Center National Center for Space Weather Beijing Institute of Petrochemical Technology

Cross-calibration of high energetic particle data is a primary requirement for the availability of multi-instrument, multi-spacecraft data. II also can provide a method to verify relative reliability of data from single satellite measurement. This pa- per presents a case study of energetic particles data cross-calibration between FY-3B and NOAA-17. A generally good agree- ment is acquired in the flux values and distribution trend of 2.5-6.9 MeV protons and 0.3-1.1 MeV electrons between FY-3B and NOAA-17 satellites. It suggests that the data observed by FY-3B is properly cross-calibrated. We can also confirm that energetic particles data observed by FY-3B satellite is available.

关键词： cross-calibration high energetic particle FY-3B

在线全文

学校读者我要写书评

暂无评论

外辐射带区域新建地磁场经验模型的定量研究

地球物理学报 2020年第11期63卷 3944-3951页

作者：王丽杨晓超张珅毅中国科学院国家空间科学中心北京100190 中国科学院大学北京100049 天基空间环境探测北京市重点实验室北京100190

准确的磁场模型对于辐射带粒子环境研究至关重要.本文利用美国Van Allen Probes(VAP)在2012至2018年期间测量的磁场数据和GOES15在2011至2017年期间测量的磁场数据,定量地评估了三个较新的外磁场经验模型(TS05、TA15和TA16)对外辐射带区... 详细信息

准确的磁场模型对于辐射带粒子环境研究至关重要.本文利用美国Van Allen Probes(VAP)在2012至2018年期间测量的磁场数据和GOES15在2011至2017年期间测量的磁场数据,定量地评估了三个较新的外磁场经验模型(TS05、TA15和TA16)对外辐射带区域(3~6.6 R E)磁场的描述性能.本文选择预测效率(Prediction Efficiency,PE)作为评估指标,定量分析各模型在不同空间范围(Lm值)、不同地磁活动水平(Kp)以及不同磁地方时(MLT)下的性能表现,并且计算了观测磁场与模型磁场的夹角θ,以评估模型的磁场方向预测能力.结果表明:PE随Lm值增大,随地磁扰动增强而下降;θ随Lm值增大,随地磁扰动增强而增大.在Lm=5~6.5 R E范围内,PE呈现晨昏不对称性,MLT=12-21时的PE值小于MLT=0-9时的值,说明三个磁场模型可以较好地描述晨侧磁场的强度,但它们并不能很好地反映下午至昏侧磁场的大小;在地球同步轨道附近(Lm^6.6 R E),PE呈现昼夜不对称性,MLT=9-15时的PE值大于其他时区的值,说明三个磁场模型可以很好地反映昼侧磁场大小,但在夜侧可能存在较大的误差.θ在MLT=6-12时的值小于其他时区的值,呈现昼夜不对称性,说明三个磁场模型可以较好地描述昼侧磁力线的分布位型,但在夜侧存在较大的方向描述误差.在外辐射带3~6.5 R E内,TA16模型与VAP磁场观测数据最为接近,PE均大于0.7,θ均小于3°;在地球同步轨道高度(6.6 R E),TS05模型与GOES15卫星磁场观测数据最为接近,PE约为0.75,θ约为7°.相关的研究结果可以为我国星载高能粒子探测器探测数据的在轨交叉定标、辐射带高能粒子动态模型研究和相关的磁层环境理论/应用研究提供地磁场模型选择方面的参考.

关键词：外辐射带 VAP GOES15 外磁场经验模型预测效率