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Retrieving the antarctic sea-ice concentration based on AMSR-E 89 GHz data

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Acta Oceanologica Sinica 2013年第9期32卷 38-43页

作者： yu qinglong WANG Hui WAN Liying BI Haibo National Marine Environmental Forecasting Center State Oceanic Administration Institute of Remote Sensing Applications Chinese Academy of Sciences Graduate School Chinese Academy of Sciences

Sea-ice concentration is a key item in global climate change research. Recent progress in remotely sensed sea-ice concentration product has been stimulated by the use of a new sensor, advanced microwave scan- ning radiometer for EOS （AMSR-E）, which offers a spatial resolution of 6 km×4 km at 89GHz, A new inver- sion algorithm named LASI （linear ASI） usingAMSR-E 89GHz data was proposed and applied in the antarc- tic sea areas. And then comparisons between the LASI ice concentration products and those retrieved by the other two standard algorithms, ASI （arctic radiation and turbulence interaction study sea-ice algorithm） and bootstrap, were made. Both the spatial and temporal variability patterns of ice concentration differ- ences, LASI minus ASI and LASI minus bootstrap, were investigated. Comparative data suggest a high result consistency, especially between LASI and ASI. On the other hand, in order to estimate the LASI ice concen- tration errors introduced by the tie-points uncertainties, a sensitivity analysis was carried out. Additionally an LASI algorithm error estimation based on the field measurements was also completed. The errors suggest that the moderate to high ice concentration areas （〉70%） are less affected （never exceeding 10%） than those in the low ice concentration. LASI and ASI consume 75 and 112 s respectively when processing the same AMSR-E time series thourghout the year 2010. To conclude, by using the LASI algorithm, not only the sea- ice concentration can be retrieved with at least an equal quality as that of the two extensively demonstrated operational algorithms, ASI and bootstrap, but also in a more efficient way than ASI.

关键词： sea-ice concentration AMSR-E antarctic LASI algorithm

Simulation of ENA Imaging Measurements on a Geosynchronous Orbit

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空间科学学报 2022年第5期42卷 884-890页

作者： LU Li yu qinglong ZHOU Ping JIA Shuai CHANG yuan Laboratory of Space Environment Exploration National Space Science CenterChinese Academy of SciencesBeijing 100190 Beijing Key Laboratory of Space Environment Exploration Beijing 100190 Key Laboratory of Science and Technology on Space Environment Situational Awareness Chinese Academy of ScienceBeijing 100049 Shanghai Institute of Satellite Engineering Shanghai 200240

Geosynchronous orbit is located in the ring current region,where the energetic particle emission environment challenges the ion deflection design limit of the Energetic Neutral Atom(ENA)***,there is no measurement record of ENA imaging in this area *** the basis of possessing the patent of high-energy ion deflection technology,ENA imaging under different Kp index in geosynchronous orbit is *** simulation images show the characteristics of low-altitude ENA emission source and the rough sketch of *** to the north-south conjugation observation of geosynchronous orbit,the simulated ENA images at different positions all have north-south *** at the unsolved problems,such as the input source of ring current energetic ions during geomagnetic activities and its evolution process,we analyzed the possible results of ENA imaging combined with in-situ particle measurements in the same satellite,as well as the subversion effect of any north-south asymmetry of ENA map on the inversion model.

关键词： Energetic Neutral Atom(ENA) Magnetosphere Ring current ENA imaging

Arctic multiyear sea ice variability observed from satellites:a review

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Journal of Oceanology and Limnology 2020年第4期38卷 962-984页

作者： BI Haibo LIANG yu WANG yunhe LIANG Xi ZHANG Zehua DU Tingqin yu qinglong HUANG Jue KONG Mei HUANG Haijun CAS Key Laboratory of Marine Geology and Environment Institute of OceanologyChinese Academy of SciencesQingdao 266071China Laboratory for Marine Geology Qingdao National Laboratory for Marine Science and TechnologyQingdao 266200China Center for Ocean Mega-Science Chinese Academy of SciencesQingdao 266071China University of Chinese Academy of Sciences Beijing 100049China Shandong Academy of Environmental Science Co. Ltd.Jinan 250013China National Marine Environmental Forecasting Center Beijing 100081China Shandong University of Science and Technology Qingdao 266590China Shandong Provincial Eco-environment Monitoring Center Jinan 250101China

In comparison with seasonal sea ice(first-year ice,FY ice),multiyear(MY)sea ice is thicker and has more opportunity to survive through the summer melting ***,the variability of wintertime MY ice plays a vital role in modulating the variations in the Arctic sea ice minimum extent during the following *** a response,the ice-ocean-atmosphere interactions may be significantly affected by the variations in the MY ice *** observations are characterized by their capability to capture the spatiotemporal changes of Arctic sea *** the recent decades,many active and passive sensors onboard a variety of satellites(QuikSCAT,ASCAT,SSMIS,ICESat,CryoSat-2,etc.)have been used to monitor the dramatic loss of Arctic MY *** main objective of this study is to outline the advances and remaining challenges in monitoring the MY ice changes through the utilization of multiple satellite *** summarize the primary satellite data sources that are used to identify MY *** methodology to classify MY ice and derive MY ice concentration is *** interannual variability and trends in the MY ice time series in terms of coverage,thickness,volume,and age composition are *** potential causes associated with the observed Arctic MY ice loss are outlined,which are primarily related to the export and melting *** addition,the causes to the MY ice depletion from the perspective of the oceanic water inflow from Pacific and Atlantic Oceans and the water vapor intrusion,as well as the roles of synoptic weather,are *** remaining challenges and possible upcoming research subjects in detecting the rapidly changing Arctic MY ice using the combined application of multisource remote sensing techniques are ***,some suggestions for the future application of satellite observations on the investigations of MY ice cover changes are proposed.

关键词： multiyear sea ice Arctic Ocean satellite observation

Spatiotemporal characteristics of sea ice transport in the Baffin Bay and its association with atmospheric variability

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Acta Oceanologica Sinica 2021年第3期40卷 1-17页

作者： Weifu Sun Haibo Bi Min Fu Xi Liang yunhe Wang yu Liang Jue Huang Haijun Huang Liwen Yan qinglong yu Shuang Liang Oceanic Telemetry Engineering and Technology Innovation Center First Institute of OceanographyMinistry of Natural ResourcesQingdao 266061China Laboratory for Marine Geology Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266037China Center for Ocean Mega-Science&Key Laboratory of Marine Geology and Environment Institute of OceanologyChinese Academy of SciencesQingdao 266071China National Marine Environmental Forecasting Center Beijing 100081China University of Chinese Academy of Sciences Beijing 100049China Aerospace Information Research Institute Chinese Academy of SciencesBeijing 100094China College of Geodesy and Geomatics Shandong University of Sicence and TechnologyQingdao 266590China

Sea ice export through the Baffin Bay plays a vital role in modulating the sea ice cover variability in the Labrador *** this study,satellite-derived sea ice products are used to obtain the sea ice area flux(SIAF)through the three passages in the Baffin Bay(referred to as A,B,and C for the north,middle,and south passages,respectively).The spatial variability of the monthly sea ice drift in the Baffin Bay is *** interannual variability and trends in SIAF via the three passages are *** connection to several large-scale atmospheric circulation modes is *** the period of 1988-2015,the average annual(October to the following September)SIAF amounts to 555×10^(3) km^(2),642×10^(3) km^(2),and 551×10^(3) km^(2) through Passages A,B,and C,*** quantities are less than that observed through the Fram Strait(FS,707×10^(3) km^(2))of the corresponding *** positive trends in annual SIAF,on the order of 53.1×10^(3) km^(2)/(10 a)and 43.2×10^(3) km^(2)/(10 a)(significant at the 95%confidence level),are identified at Passages A and B,*** trend of the south passage(C),however,is slightly negative(-13.3×10^(3) km^(2)/(10 a),not statistically significant).The positive trends in annual SIAF through the Passages A and B are primarily attributable to the significant increases after *** connection between the Baffin Bay sea ice export and the North Atlantic Oscillation is not significant over the studied *** contrast,the association with the cross-gate sea level pressure difference is robust in the Baffin Bay(R equals 0.69 to 0.71,depending on the passages considered),but relatively weaker than that over FS(R=0.74).

关键词： sea ice transport Baffin Bay Arctic sea ice area flux(SIAF)

AI绘画软件的创作特征研究——以绘画软件Novel AI生成的动漫人物形象为例

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信阳师范学院学报（哲学社会科学版） 2023年第3期43卷 127-132页

作者：余青龙韩国东西大学釜山广域市47011

近年来,随着扩散模型、Lora模型、Controlnet等技术应用于绘画领域,现今的AI绘画软件已经能够生成完整的动漫人物,具备了较高的可控性和精确性。文章通过分析AI绘画软件“Novel AI”生成的动漫人物形象,总结了这一AI软件表现出的绘画创... 详细信息

近年来,随着扩散模型、Lora模型、Controlnet等技术应用于绘画领域,现今的AI绘画软件已经能够生成完整的动漫人物,具备了较高的可控性和精确性。文章通过分析AI绘画软件“Novel AI”生成的动漫人物形象,总结了这一AI软件表现出的绘画创作特征,并在此基础上评估了现今人工智能技术对于动漫创作产生的影响。

关键词： AI绘画 Novel AI 动漫人物

同方期刊数据库博看期刊评论

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青藏高原夏季极端降水概率分布特征

高原气象 2017年第5期36卷 1176-1187页

作者：曹瑜游庆龙马茜蓉孟宪红南京信息工程大学气象灾害教育部重点实验室/气候与环境变化国际合作联合实验室/气象灾害预报预警与评估协同创新中心南京210044 中国科学院寒旱区陆面过程与气候变化重点实验室兰州730000

基于国家级地面气象站基本气象要素日值数据集的均一化降水序列计算了1961—2014年青藏高原中东部71个站夏季极端降水指数,选取二参数和三参数的Weibull分布、广义极值分布、皮尔逊Ⅲ型分布(Gamma分布)、对数逻辑斯特分布拟合其极值,分... 详细信息

基于国家级地面气象站基本气象要素日值数据集的均一化降水序列计算了1961—2014年青藏高原中东部71个站夏季极端降水指数,选取二参数和三参数的Weibull分布、广义极值分布、皮尔逊Ⅲ型分布(Gamma分布)、对数逻辑斯特分布拟合其极值,分析了青藏高原中东部夏季极端降水的极值分布特征。结果表明:青藏高原夏季极端降水由东南向西北递减,大值中心位于四川东部地区,西藏东南部有一较大值中心,小值中心位于青海西北部。通过极值分布函数对极端降水指数的拟合,发现不同的指数适用的函数不同,需采用多种概率分布模式进行对比,并结合实际物理意义加以选择最适合的拟合分布函数。利用Gumbel分布计算夏季极端降水指数的多年一遇水平、50年一遇和100年一遇水平,均呈现出完全一致的空间分布特征:东南降水多,西北降水少;根据滑动t检验,强降水量和极强降水量均于2006年突变,由Gumbel分布估计突变后青藏高原中东部的极端降水有所增加。

关键词：青藏高原夏季极端降水极值分布函数

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不同动应力作用下黏质粉土动力特性研究

铁道建筑技术 2022年第6期 100-104页

作者：于庆龙中铁十九局集团电务工程有限公司北京100076

地铁列车持续性循环荷载对地下结构所产生的动力响应是地基及周围土层长期沉降变形关键问题。本文依托杭州地铁8号线一期工程右K11+965.735~右K13+433.140标段黏质粉土地基隧道,基于室内不同动应力幅值下动三轴试验,采用正弦波加载方式... 详细信息

地铁列车持续性循环荷载对地下结构所产生的动力响应是地基及周围土层长期沉降变形关键问题。本文依托杭州地铁8号线一期工程右K11+965.735~右K13+433.140标段黏质粉土地基隧道,基于室内不同动应力幅值下动三轴试验,采用正弦波加载方式模拟列车通过所引起的复杂动应力,研究黏质粉土在不同动应力幅值下残余应变变化规律,并采用Monismith模型对残余应变变化规律进行拟合。研究结果表明:随动应力和振次增加,土样残余应变持续增大;在动应力幅值160~200 kPa之间存在一临界值,而超过这一临界动应力值之后残余应变呈突变式增长,且不同动应力幅值下土样残余应变与振次关系表现为稳定型;Monismith模型对土样残余应变增长规律拟合效果较好,且随动应力幅值增加,振陷模型参数a和b均呈增大趋势。

关键词：黏质粉土动应力幅值动三轴试验残余应变 Monismith模型

基于BIM与智能分析的地铁机电安装信息处理模型设计

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现代电子技术 2021年第18期44卷 123-126页

作者：于庆龙上海铁道大学上海200331 中铁十九局集团电务工程有限公司北京100000

针对地下轨道交通系统中地铁车站机电设备安装管理过程工作效率低下的现状,文中利用BIM软件工具作为基础数据信息平台,设计一套具有较强数据交互功能的机电设备安装信息处理模型。通过深入分析传统地铁用机电设备安装信息管理体系中的... 详细信息

针对地下轨道交通系统中地铁车站机电设备安装管理过程工作效率低下的现状,文中利用BIM软件工具作为基础数据信息平台,设计一套具有较强数据交互功能的机电设备安装信息处理模型。通过深入分析传统地铁用机电设备安装信息管理体系中的优缺点,全面细致地量化所设计机电设备安装信息处理模型的系统和信息需求。并在需求分析的基础上,综合使用SQL Server与BIM模型,系统化地整合了机电设备的模型、图纸和文档等所有数据信息,从而实现了模型信息的及时共享及动态监控,最终大幅提高地铁机电设备的安装管理效率。应用和测试分析结果表明,所提模型可以较好地实现地铁机电设备安装项目任务信息的细致分解和系统化管控,而且所需要的管理成本很低。

关键词：地铁交通设备安装维修管理信息处理模型数据信息整合动态监控

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中性原子成像仪的定标测试

空间科学学报 2017年第4期37卷 484-489页

作者：路立余庆龙张焕新荆涛杨垂柏中国科学院国家空间科学中心北京100190

中性原子成像仪(NAIS-H)获取的高时空分辨率图像可为地球空间磁暴和亚暴过程的各类机制研究提供全景式的空间粒子分布数据,为磁层与电离层耦合、磁层能量耗散等MIT(磁层-电离层-热层耦合小卫星星座探测计划)科学研究任务提供重要的数据... 详细信息

中性原子成像仪(NAIS-H)获取的高时空分辨率图像可为地球空间磁暴和亚暴过程的各类机制研究提供全景式的空间粒子分布数据,为磁层与电离层耦合、磁层能量耗散等MIT(磁层-电离层-热层耦合小卫星星座探测计划)科学研究任务提供重要的数据支撑.探测器的标定是研制过程的一个重要技术环节,是日后空l可探测数据分析和反演基本依据.本文利用模拟信号源对中性原子成像仪原理样机的前端电子学系统进行了能谱定标,并利用电子加速器对标定的能谱进行了辐射测试验证.

关键词：能量中性原子全能谱图能谱半高宽模数转换阈值