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2016 IEEE Pacific Visualization Symposium (PacificVis)最新文献

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EnsembleGraph: Interactive visual analysis of spatiotemporal behaviors in ensemble simulation data 集成仿真数据中时空行为的交互式可视化分析
Pub Date : 2016-04-19 DOI: 10.1109/PACIFICVIS.2016.7465251
Q. Shu, Hanqi Guo, Jie Liang, Limei Che, Junfeng Liu, Xiaoru Yuan
This paper presents a novel visual analysis tool, EnsembleGraph, which aims at helping scientists understand spatiotemporal similarities across runs in time-varying ensemble simulation data. We abstract the input data into a graph, where each node represents a region with similar behaviors across runs and nodes in adjacent time frames are linked if their regions overlap spatially. The visualization of this graph, combined with multiple-linked views showing details, enables users to explore, select, and compare the extracted regions that have similar behaviors. The driving application of this paper is the study of regional emission influences over tropospheric ozone, based on the ensemble simulations conducted with different anthropogenic emission absences using MOZART-4. We demonstrate the effectiveness of our method by visualizing the MOZART-4 ensemble simulation data and evaluating the relative regional emission influences on tropospheric ozone concentrations.
本文提出了一种新的可视化分析工具,EnsembleGraph,旨在帮助科学家了解时变集成模拟数据中运行的时空相似性。我们将输入数据抽象成一个图,其中每个节点代表一个在运行中具有相似行为的区域,如果相邻时间框架中的节点的区域在空间上重叠,则它们是链接的。此图的可视化与显示详细信息的多个链接视图相结合,使用户能够探索、选择和比较具有相似行为的提取区域。本文的驱动应用是基于MOZART-4在不同人为排放缺失情况下进行的整体模拟,研究区域排放对对流层臭氧的影响。我们通过可视化MOZART-4集合模拟数据和评估相对区域排放对对流层臭氧浓度的影响来验证我们方法的有效性。
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引用次数: 23
Comparative visualization of vector field ensembles based on longest common subsequence 基于最长公共子序列的矢量场集合的比较可视化
Pub Date : 2016-04-19 DOI: 10.1109/PACIFICVIS.2016.7465256
Richen Liu, Hanqi Guo, Jiang Zhang, Xiaoru Yuan
We propose a longest common subsequence (LCSS)-based approach to compute the distance among vector field ensembles. By measuring how many common blocks the ensemble pathlines pass through, the LCSS distance defines the similarity among vector field ensembles by counting the number of shared domain data blocks. Compared with traditional methods (e.g., pointwise Euclidean distance or dynamic time warping distance), the proposed approach is robust to outliers, missing data, and the sampling rate of the pathline timesteps. Taking advantage of smaller and reusable intermediate output, visualization based on the proposed LCSS approach reveals temporal trends in the data at low storage cost and avoids tracing pathlines repeatedly. We evaluate our method on both synthetic data and simulation data, demonstrating the robustness of the proposed approach.
我们提出了一种基于最长公共子序列(LCSS)的方法来计算向量场集合之间的距离。LCSS距离通过测量集成路径经过的公共块的数量,通过计算共享域数据块的数量来定义向量场集成之间的相似性。与传统方法(如点向欧几里得距离或动态时间翘曲距离)相比,该方法对异常值、缺失数据和路径时间步长的采样率具有鲁棒性。利用更小和可重用的中间输出,基于LCSS方法的可视化以低存储成本揭示数据中的时间趋势,避免重复跟踪路径。我们在合成数据和仿真数据上对我们的方法进行了评估,证明了所提出方法的鲁棒性。
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引用次数: 26
A visual analytics approach for exploring individual behaviors in smartphone usage data 一种可视化分析方法,用于探索智能手机使用数据中的个人行为
Pub Date : 2016-04-19 DOI: 10.1109/PACIFICVIS.2016.7465275
Mingming Lu, Dan Meng, Yanni Peng, Yong Li, Ying Zhao, Xiaoping Fan, Fangfang Zhou
The percentage of individuals frequently using their smartphones in work and life is increasing steadily. The interactions between individuals and their smartphones can produce large amounts of usage data, which contain rich information about smartphone owners usage habits and their daily life. In this paper, a visual analytic tool is proposed to discover and understand individual behavior patterns in smartphone usage data. Four cooperated visualization views and many interactions are provided in this tool to visually explore the temporal features of various interactive events between smartphones and their users, the hierarchical associations among event types, and the detailed distributions of massive event sequences. In the case studies, plenty of interesting patterns are discovered by analyzing the data of two smartphone users with different usage styles.
在工作和生活中频繁使用智能手机的个人比例正在稳步上升。个人与智能手机之间的互动可以产生大量的使用数据,这些数据包含了智能手机用户使用习惯和日常生活的丰富信息。本文提出了一种可视化分析工具来发现和理解智能手机使用数据中的个人行为模式。该工具提供了四种协同可视化视图和多种交互,可以直观地探索智能手机与用户之间各种交互事件的时间特征、事件类型之间的层次关联以及大规模事件序列的详细分布。在案例研究中,通过分析两个不同使用风格的智能手机用户的数据,发现了许多有趣的模式。
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引用次数: 2
Visual analysis of body movement in serious games for healthcare 医疗保健游戏中身体运动的视觉分析
Pub Date : 2016-04-19 DOI: 10.1109/PACIFICVIS.2016.7465276
Oky Purwantiningsih, A. Sallaberry, S. Andary, Antoine Seilles, J. Azé
The advancement of motion sensing input devices has enabled the collection of multivariate time-series body movement data. Analyzing such type of data is challenging due to the large amount of data and the task of mining for interesting temporal movement patterns. To address this problem, we propose an interface to visualize and analyze body movement data. This visualization enables users to navigate and explore the evolution of movement over time for different movement areas. We also propose a clustering method based on hierarchical clustering to group similar movement patterns. The proposed visualization is illustrated with a case study which demonstrates the ability of the interface to analyze body movements.
运动传感输入设备的进步使得多变量时间序列身体运动数据的收集成为可能。由于大量的数据和挖掘有趣的时间运动模式的任务,分析这类数据是具有挑战性的。为了解决这个问题,我们提出了一个界面来可视化和分析身体运动数据。这种可视化使用户能够导航和探索不同运动区域随时间的运动演变。我们还提出了一种基于层次聚类的聚类方法来对相似的运动模式进行分组。通过一个案例研究说明了该界面分析身体运动的能力。
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引用次数: 10
TravelDiff: Visual comparison analytics for massive movement patterns derived from Twitter TravelDiff:基于Twitter的大规模移动模式的可视化比较分析
Pub Date : 2016-04-19 DOI: 10.1109/PACIFICVIS.2016.7465266
Robert Krüger, Guodao Sun, Fabian Beck, Ronghua Liang, T. Ertl
Geo-tagged microblog data covers billions of movement patterns on a global and local scale. Understanding these patterns could guide urban and traffic planning or help coping with disaster situations. We present a visual analytics system to investigate travel trajectories of people reconstructed from microblog messages. To analyze seasonal changes and events and to validate movement patterns against other data sources, we contribute highly interactive visual comparison methods that normalize and contrast trajectories as well as density maps within a single view. We also compute an adaptive hierarchical graph from the trajectories to abstract individual movements into higher-level structures. Specific challenges that we tackle are, among others, the spatio-temporal sparsity of the data, the volume of data varying by region, and a diverse mix of means of transportation. The applicability of our approach is presented in three case studies.
地理标记的微博数据涵盖了全球和地方范围内数十亿种移动模式。了解这些模式可以指导城市和交通规划或帮助应对灾害情况。本文提出了一种基于微博信息重构的人的出行轨迹可视化分析系统。为了分析季节变化和事件,并根据其他数据源验证运动模式,我们提供了高度交互式的视觉比较方法,可以在单个视图中规范化和对比轨迹以及密度图。我们还从轨迹计算了一个自适应的层次图,将单个运动抽象为更高层次的结构。我们要解决的具体挑战包括数据的时空稀疏性、数据量因地区而异以及交通工具的多样化。我们的方法的适用性在三个案例研究中提出。
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引用次数: 31
Spot-tracking lens: A zoomable user interface for animated bubble charts 点跟踪镜头:动画气泡图的可缩放用户界面
Pub Date : 2016-04-19 DOI: 10.1109/PACIFICVIS.2016.7465246
Yueqi Hu, Tom Polk, J. Yang, Ye Zhao, Shixia Liu
Zoomable user interfaces are widely used in static visualizations and have many benefits. However, they are not well supported in animated visualizations due to problems such as change blindness and information overload. We propose the spot-tracking lens, a new zoomable user interface for animated bubble charts, to tackle these problems. It couples zooming with automatic panning and provides a rich set of auxiliary techniques to enhance its effectiveness. Our preliminary user studies suggested that, besides allowing users to examine detail information, it can be an engaging approach to exploratory analysis for dynamic data.
可缩放用户界面广泛用于静态可视化,并且具有许多优点。然而,由于变化盲目性和信息过载等问题,它们在动画可视化中没有得到很好的支持。我们提出点跟踪镜头,一个新的可缩放用户界面的动画气泡图,以解决这些问题。它结合缩放与自动平移,并提供了丰富的辅助技术,以提高其有效性。我们的初步用户研究表明,除了允许用户检查详细信息外,它还可以成为一种引人入胜的动态数据探索性分析方法。
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引用次数: 1
Dimension reconstruction for visual exploration of subspace clusters in high-dimensional data 高维数据中子空间聚类视觉探索的维数重建
Pub Date : 2016-04-19 DOI: 10.1109/PACIFICVIS.2016.7465260
Fangfang Zhou, Juncai Li, Wei Huang, Ying Zhao, Xiaoru Yuan, Xing Liang, Yang Shi
Subspace-based analysis has increasingly become the preferred method for clustering high-dimensional data. A visually interactive exploration of subspaces and clusters is a cyclic process. Every meaningful discovery will motivate users to re-search subspaces that can provide improved clustering results and reveal the relationships among clusters that can hardly coexist in the original subspaces. However, the combination of dimensions from the original subspaces is not always effective in finding the expected subspaces. In this study, we present an approach that enables users to reconstruct new dimensions from the data projections of subspaces to preserve interesting cluster information. The reconstructed dimensions are included into an analytical workflow with the original dimensions to help users construct target-oriented subspaces which clearly display informative cluster structures. We also provide a visualization tool that assists users in the exploration of subspace clusters by utilizing dimension reconstruction. Several case studies on synthetic and real-world data sets have been performed to prove the effectiveness of our approach. Lastly, further evaluation of the approach has been conducted via expert reviews.
基于子空间的分析日益成为高维数据聚类的首选方法。子空间和集群的视觉交互探索是一个循环过程。每一个有意义的发现都会激励用户研究能够提供改进聚类结果的子空间,并揭示在原始子空间中难以共存的聚类之间的关系。然而,来自原始子空间的维度组合并不总是有效地找到期望的子空间。在这项研究中,我们提出了一种方法,使用户能够从子空间的数据投影中重建新的维度,以保留有趣的聚类信息。重构的维度与原始维度一起包含在分析工作流中,以帮助用户构建面向目标的子空间,这些子空间能够清晰地显示信息聚类结构。我们还提供了一个可视化工具,帮助用户利用维度重建来探索子空间集群。已经对合成数据集和实际数据集进行了几个案例研究,以证明我们的方法的有效性。最后,通过专家审查对该方法进行了进一步评价。
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引用次数: 22
A Bayesian approach for probabilistic streamline computation in uncertain flows 不确定流中概率流线计算的贝叶斯方法
Pub Date : 2016-04-19 DOI: 10.1109/PACIFICVIS.2016.7465273
Wenbin He, Chun-Ming Chen, Xiaotong Liu, Han-Wei Shen
Streamline-based techniques play an important role in visualizing and analyzing uncertain steady vector fields. It is a challenging problem to generate accurate streamlines in uncertain vector fields due to the global uncertainty transportation. In this work, we present a novel probabilistic method for streamline computation on uncertain steady vector fields using a Bayesian framework. In our framework, a streamline is modeled as a state space model which captures the spatial coherence of integration steps and uncertainty in local distributions using the conditional prior density and the likelihood function. To approximate the posterior distribution for all the possible traces originating from a given seed position, a set of weighted samples are iteratively updated from which streamlines with higher likelihood can be derived. We qualitatively and quantitatively compare our method with alternative methods on different types of flow field data sets. Our method can generate possible streamlines with higher certainty and hence more accurate flow traces.
基于流线的技术在不确定稳定矢量场的可视化和分析中发挥着重要作用。由于不确定矢量场的全局不确定性传输,如何在不确定矢量场中生成精确的流线是一个具有挑战性的问题。在这项工作中,我们提出了一种新的概率方法,用于不确定稳定向量场的流线计算。在我们的框架中,流线被建模为一个状态空间模型,该模型使用条件先验密度和似然函数捕获积分步骤的空间相干性和局部分布中的不确定性。为了近似所有可能的轨迹的后验分布,从一个给定的种子位置出发,一组加权样本被迭代更新,从中可以得到具有更高可能性的流线。我们在不同类型的流场数据集上定性和定量地比较了我们的方法与其他方法。我们的方法可以生成具有更高确定性的可能流线,因此更精确的流动轨迹。
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引用次数: 4
Topology-inspired Galilean invariant vector field analysis 拓扑启发的伽利略不变向量场分析
Pub Date : 2016-04-19 DOI: 10.1109/PACIFICVIS.2016.7465253
R. Bujack, M. Hlawitschka, K. Joy
Vector field topology is one of the most powerful flow visualization tools, because it can break down huge amounts of data into a compact, sparse, and easy to read description with little information loss. It suffers from one main drawback though: The definition of critical points, which is the foundation of vector field topology, is highly dependent on the frame of reference. In this paper we propose to consider every point as a critical point and locally adjust the frame of reference to the most persistent ones, that means the extrema of the determinant of the Jacobian. The result is not the extraction of one well-suited frame of reference, but the simultaneous visualization of the dominating frames of reference in the different areas of the flow field. Each of them could individually be perceived by an observer traveling along these critical points. We show all important ones at once.
矢量场拓扑是最强大的流可视化工具之一,因为它可以将大量数据分解成紧凑、稀疏、易于阅读的描述,并且几乎没有信息丢失。但它有一个主要的缺点:临界点的定义是矢量场拓扑的基础,它高度依赖于参照系。在本文中,我们建议将每个点视为临界点,并局部调整参考系为最持久点,即雅可比矩阵行列式的极值。结果不是提取一个非常适合的参照系,而是同时可视化了流场不同区域的主要参照系。每一个都可以被沿着这些临界点移动的观察者单独感知到。我们一次显示所有重要的。
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引用次数: 22
A design study to identify inconsistencies in kinship information: The case of the 1000 Genomes project 识别亲属信息不一致性的设计研究:以千人基因组计划为例
Pub Date : 2016-04-19 DOI: 10.1109/PACIFICVIS.2016.7465281
Michaël Aupetit, Ehsan Ullah, Reda Rawi, H. Bensmail
Genome Wide Association Studies (GWAS) examine genetic variants in different individuals to detect variants associated to specific diseases. The 1000 Genomes project is such a collaborative research effort to sequence the genomes of at least 1000 participants of 26 different ethnicities, to establish a detailed summary of human genetic variation. The kinship information is a measure of individuals ancestor relationships within the considered populations. We study the design of kinship data visualizations allowing the experts to discover anomalies in GWAS data. The visual analysis of the 1000 Genomes Project kinship data reveals inconsistencies which call for a deeper analysis of the data quality within this project.
全基因组关联研究(GWAS)检查不同个体的遗传变异,以检测与特定疾病相关的变异。千人基因组计划就是这样一项合作研究,旨在对26个不同种族的至少1000名参与者的基因组进行测序,以建立人类遗传变异的详细摘要。亲属关系信息是在所考虑的群体中个体祖先关系的衡量标准。我们研究了亲属数据可视化的设计,允许专家发现GWAS数据中的异常。1000基因组计划亲缘关系数据的可视化分析揭示了不一致性,这需要对该项目中的数据质量进行更深入的分析。
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引用次数: 2
期刊
2016 IEEE Pacific Visualization Symposium (PacificVis)
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