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A Survey of Multi-Space Techniques in Spatio-Temporal Simulation Data Visualization

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Visual Informatics 2019年第3期3卷 129-139页

作者： Xueyi Chen Liming Shen Ziqi Sha richen liu Siming Chen Genlin Ji Chao Tan School of Computer Science and Technology Nanjing Normal UniversityNo.1 Wenyuan RoadQixia DistrictNanjingJiangsuPR China Fraunhofer Institute for Intelligent Analysis and Information Systems Germany University of Bonn Germany

The widespread use of numerical simulations in different scientific domains provides a variety of research *** often output a great deal of spatio-temporal simulation data,which are traditionally characterized as single-run,multi-run,multi-variate,multi-modal and *** the perspective of data exploration and analysis,we noticed that many works focusing on spatiotemporal simulation data often share similar exploration techniques,for example,the exploration schemes designed in simulation space,parameter space,feature space and combinations of ***,it lacks a survey to have a systematic overview of the essential commonalities shared by those *** this survey,we take a novel multi-space perspective to categorize the state-ofthe-art works into three major ***,the works are characterized as using similar techniques such as visual designs in simulation space(e.g,visual mapping,boxplot-based visual summarization,etc.),parameter space analysis(e.g,visual steering,parameter space projection,etc.)and data processing in feature space(e.g,feature definition and extraction,sampling,reduction and clustering of simulation data,etc.).

关键词： Simulation data visualization Spatio-temporal data visualization Comparative visualization

Metaverse:Perspectives from graphics,interactions and visualization

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Visual Informatics 2022年第1期6卷 56-67页

作者： Yuheng Zhao Jinjing Jiang Yi Chen richen liu Yalong Yang Xiangyang Xue Siming Chen School of Data Science Fudan UniversityChina Beijing Key Laboratory of Big Data Technology for Food Safety Beijing Technology and Business UniversityChina School of Computer and Electronic Information Nanjing Normal UniversityChina Department of Computer Science Virginia TechUSA

The metaverse is a visual world that blends the physical world and digital *** present,the development of the metaverse is still in the early stage,and there lacks a framework for the visual construction and exploration of the *** this paper,we propose a framework that summarizes how graphics,interaction,and visualization techniques support the visual construction of the metaverse and user-centric *** introduce three kinds of visual elements that compose the metaverse and the two graphical construction methods in a *** propose a taxonomy of interaction technologies based on interaction tasks,user actions,feedback and various sensory channels,and a taxonomy of visualization techniques that assist user *** potential applications and future opportunities are discussed in the context of visual construction and exploration of the *** hope this paper can provide a stepping stone for further research in the area of graphics,interaction and visualization in the metaverse.

关键词： Metaverse Virtual reality/Augmented reality Computer graphics User interaction Immersive visualization

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探地数据可视化研究

计算机辅助设计与图形学学报 2015年第1期27卷 36-45页

作者：原达刘日晨袁晓如山东工商学院计算机科学与技术学院烟台264005 北京大学信息科学技术学院机器感知与智能教育部重点实验室北京100871

由于发展中国家经济增长的驱动,全球对石油、天然气体的需求在不断地增长,从而需要越来越纯熟的石油勘探技术.探地数据可视化在石油、天然气勘探过程中起着举足轻重的作用.文中主要从可视化的角度对探地数据的解释与展示进行了调研:首... 详细信息

由于发展中国家经济增长的驱动,全球对石油、天然气体的需求在不断地增长,从而需要越来越纯熟的石油勘探技术.探地数据可视化在石油、天然气勘探过程中起着举足轻重的作用.文中主要从可视化的角度对探地数据的解释与展示进行了调研:首先介绍了以二维切片为主的探地数据可视化方法,包括二维切片纹理映射、二维断层可视化;其次讨论了以三维体绘制技术为主的探地数据可视化方法;最后总结了解释性与叙述性可视化,以及基于Sketch的交互式可视化和领域知识辅助的可视化.

关键词：探地数据切片可视化体绘制解释性可视化

DTBVis:An interactive visual comparison system for digital twin brain and human brain

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Visual Informatics 2023年第2期7卷 41-53页

作者： Yuxiao Li Xinhong Li Siqi Shen Longbin Zeng richen liu Qibao Zheng Jianfeng Feng Siming Chena School of Data Science Fudan UniversityChina Institute of Science and Technology for Brain-Inspired Intellignece Fudan UniversityChina School of Computer and Electronic Information Nanjing Normal UniversityChina

The digital twin brain(DTB)computing model from brain-inspired computing research is an emerging artificial intelligence technique,which is realized by a computational modeling approach of hardware and *** can achieve various cognitive abilities and their synergistic mechanisms in a manner similar to the human *** that the task of the DTB is to simulate the functions of the human brain,comparing the similarities and differences between the two is ***,the visualization study of the DTB is still ***,the complexity of the datasets(multilevel spatiotemporal granularity and different types of comparison tasks)presents new challenges to the analysis and exploration of ***,in this study,we proposed DTBVis,a visual analytics system that supports comparison tasks for the *** supports iterative explorations from different levels and at different *** with automatic similarity recommendation,and high-dimensional exploration,DTBVis can assist experts in understanding the similarities and differences between the DTB and the human brain,thus helping them adjust their model and enhance its *** highest level of DTBVis shows an overview of the datasets from the brain,which is used for comparison and exploration of the function and structure of the DTB and the human *** medium level is used for the comparison and exploration of a designated brain *** low level can analyze a designated brain *** worked closely with experts of brain science and held regular seminars with *** from the experts indicates that our approach helps them conduct comparative studies of the DTB and human brain and make modeling adjustments of the DTB through intuitive visual comparisons and interactive explorations.

关键词： Brain Digital twin brain Visual analytics Comparative analysis

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气动状态对涡轮叶片激振力与振动的影响

动力工程学报 2024年第11期44卷 1797-1803页

作者：刘日晨陈云王鹏中国航发沈阳发动机研究所沈阳110015

以某型存在高周疲劳失效现象的涡轮为仿真模型,采用涡轮三维非定常流场与固体振动响应分析耦合的计算方法,开展故障状态点的仿真。针对不同的涡轮膨胀比和涡轮反力度工况,对比分析了气动状态发生变化后动叶负荷分布和气动激振力的变化规... 详细信息

以某型存在高周疲劳失效现象的涡轮为仿真模型,采用涡轮三维非定常流场与固体振动响应分析耦合的计算方法,开展故障状态点的仿真。针对不同的涡轮膨胀比和涡轮反力度工况,对比分析了气动状态发生变化后动叶负荷分布和气动激振力的变化规律,以及叶片振动应力的相对变化趋势。结果表明:在进气工况不变的情况下,随着涡轮工作膨胀比的增大,叶片平均激振力、激振力幅值和振动应力呈明显增大趋势;随着涡轮反力度的增大,叶片平均气动激振力明显增大,但对应的激振力幅值和振动应力呈下降趋势。

关键词：气动性能叶片激振力振动响应膨胀比涡轮反力度

Some observational results of sea storm current

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Acta Oceanologica Sinica 2001年第2期20卷 299-308页

作者： Xiu richen, liu Aiju, Ye Hesong, Gu Yuhe, Xu Lanying (1. First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China 2. Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China) First Institute of Oceanography State Oceanic Administration Qingdao 266061 China

INTRODUCTIONDr. Hollister, a marine geologist of the Woods Hole Oceanographic Institution, first pointed out that there was ocean storm current in the ocean. He found out the wavy texture in the seabed core samples, and suggested that this wavy texture was caused by the high speed sea current in remote antiquity. He then suggested a bold hypothesis that there existed a benthic storm current near the ocean bottom, and presented this hypothesis at the IUGG conference held at San Francisco in 1963. Unfortunately, the attention was not drawn to the hypothesis at the conference, and the hypothesis was criticized as a sheer nonsense.

关键词： Sea storm current tidal storm current chaotic motion

高压涡轮动叶叶尖掉块对气动性能及振动的影响

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发电技术 2024年第5期45卷 856-867页

作者：赵明阳殷林林韦文涛陈云刘日晨李军中国航发沈阳发动机研究所辽宁省沈阳市110015 西安交通大学能源与动力工程学院陕西省西安市710049

【目的】高压涡轮损伤条件下运行状态对燃气轮机性能和振动会产生一定影响,而目前准确评估整机是否可以继续服役的手段较为缺乏,为此开展高压涡轮动叶叶尖凹槽磨损掉块对气动性能及振动变形的影响研究。【方法】采用三维数值仿真方法,... 详细信息

【目的】高压涡轮损伤条件下运行状态对燃气轮机性能和振动会产生一定影响,而目前准确评估整机是否可以继续服役的手段较为缺乏,为此开展高压涡轮动叶叶尖凹槽磨损掉块对气动性能及振动变形的影响研究。【方法】采用三维数值仿真方法,以原动叶完整叶尖凹槽结构为基准,通过仿真分析了5种不同叶尖凹槽掉块形状对高压涡轮典型气动性能及动叶振动特性的影响规律。【结果】动叶叶尖凹槽叶盆侧掉块,叶背侧掉块,尾缘掉块,叶盆和尾缘同时掉块,叶盆、叶背和尾缘同时掉块,分别造成高压涡轮效率下降0.44%、1.6%、0.03%、0.67%、3.2%;不同动叶叶尖凹槽形状对动叶的振动变形影响较小,尾缘掉块会减小动叶的变形。【结论】综合气动性能及振动变形的影响分析,对于动叶叶尖凹槽的叶盆掉块、尾缘掉块或两者同时掉块的叶片可以继续使用,而对于叶背掉块及盆背侧和尾缘同时掉块的叶片建议不再使用。

关键词：燃气轮机高压涡轮间隙泄漏数值仿真动叶叶尖振动响应

Attenuated total reflection infrared spectroscopy for studying electrochemical cycling of hydrogen,carbon,and nitrogen-containing molecules

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Journal of Energy Chemistry 2024年第12期99卷 495-511页

作者： Xuezhao liu Pengcheng Zhao Feifei liu richen Lin Huifeng Yao Shangqian Zhu School of Chemistry and Chemical Engineering Southeast UniversityNanjing 211189JiangsuChina Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education School of Energy and EnvironmentSoutheast UniversityNanjing 211189JiangsuChina

Electrochemical cycling of hydrogen,carbon,and nitrogen-containing molecules is of great importance to tackling energy and environmental crises and composes a central piece of the net-zero emissions *** an in-depth understanding of interfacial processes with molecular-level information is a cornerstone to developing more advanced electrocatalysts and electrochemical interfaces and further improving reaction efficiencies to meet industrial *** various in situ characterization techniques that can probe the interfacial processes,attenuated total reflection infrared spectroscopy(ATR-IR)has gained considerable attention most recently.A systematic review of its applications is expected to stimulate further efforts in studying the above-mentioned electrochemical ***,we summarize the basic principles of in situ ATR-IR and its applications in understanding mechanisms of electrochemical hydrogen,carbon,and nitrogen cycling reactions,including identification of key reaction intermediates and pathways,deciphering the impacts of interfacial environments,and revealing the structure-to-performance relationship on *** on challenges and opportunities faced by ATR-IR in further studying these reactions are also provided.

关键词： ATR-IR Electrocatalysis Reaction mechanisms

低熔点亲铜元素(LMCE)熔体超常富集贵金属的机制及其识别标志

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岩石学报 2021年第9期37卷 2629-2656页

作者：刘家军王大钊翟德高夏清郑波高燊钟日晨赵胜金中国地质大学地质过程与矿产资源国家重点实验室北京100083 中国地质大学(北京)地球科学与资源学院北京100083 东华理工大学核资源与环境国家重点实验室南昌330013 西南石油大学地球科学与技术学院成都610550 北京科技大学土木与资源工程学院北京100083 内蒙古自治区第十地质矿产勘查开发院(有限责任公司) 赤峰024005

低熔点亲铜元素(LMCE)As、Sb、Bi、Hg、Pb、Se、Te、Tl、Sn等,均具有亲铜性、低熔点、半金属的特性,在成矿过程中可以形成LMCE熔体,并对Au、Ag、PGE等贵金属的高效富集沉淀起到一种重要的桥梁作用。作者对前人研究资料与LMCE热力学相图... 详细信息

低熔点亲铜元素(LMCE)As、Sb、Bi、Hg、Pb、Se、Te、Tl、Sn等,均具有亲铜性、低熔点、半金属的特性,在成矿过程中可以形成LMCE熔体,并对Au、Ag、PGE等贵金属的高效富集沉淀起到一种重要的桥梁作用。作者对前人研究资料与LMCE热力学相图进行了分析,并结合浅成低温热液型、造山型、卡林-类卡林型、碱性-偏碱性侵入岩型金矿床的研究成果,探讨了LMCE熔体形成、类型及其对Au、Ag、PGE等贵金属富集成矿的机理,并提出了LMCE熔体参与成矿的矿物组合与结构特征标志。LMCE熔体可以在岩浆过程、(岩浆)热液过程及变质过程中形成,是贵金属矿床重要的成矿机制之一。LMCE熔体中存在大量原子团簇,团簇间的聚集生长会使熔体难以达到相平衡,形成许多非平衡矿物组合,如包含LMCE的自然元素、金属互化物及含LMCE的多相矿物。Au在LMCE熔体中也可以团簇存在,金团簇聚集形成球状或片状,并形成巨富的金矿体。LMCE熔体形成的矿物常以浑圆状、近浑圆状、不规则状的单个或群体组合的乳滴、珠滴、气泡的微粒包体产在硫化物、硒化物、碲化物、氧化物和硅酸盐矿物内或沿矿物裂隙线形排列,这些LMCE微粒包体是熔体扰动导致熔-熔或熔-液间发生乳化所致,流体沸腾是引起熔体扰动的主要机制。LMCE熔体不能快速淬火结晶,通常在低温下缓慢冷却达到相平衡,形成复杂的矿物组合,该特点即使在微米到纳米级的矿物微粒中也显著存在。熔体-流体包裹体是LMCE熔体参与成矿作用最为直接的证据。固溶体分解结构、熔体退火结构、矿物-熔体二面角结构、溶解-再沉淀结构等也是LMCE熔体参与成矿的标志性结构。

关键词：低熔点亲铜元素熔体贵金属成矿超常富集机理矿物组合特征标志