Paper Info
Title
Distribution-based Particle Data Reduction for In-situ Analysis and Visualization of Large-scale N-body Cosmological Simulations
Abstract
Cosmological N-body simulation is an important tool for scientists to study the evolution of the universe. With the increase of computing power, billions of particles of high space-time fidelity can be simulated by supercomputers. However, limited computer storage can only hold a small subset of the simulation output for analysis, which makes the understanding of the underlying cosmological phenomena difficult. To alleviate the problem, we design an in-situ data reduction method for large-scale unstructured particle data. During the data generation phase, we use a combined k-dimensional partitioning and Gaussian mixture model approach to reduce the data by utilizing probability distributions. We offer a model evaluation criterion to examine the quality of the probabilistic distribution models, which allows us to identify and improve low-quality models. After the in-situ processing, the particle data size is greatly reduced, which satisfies the requirements from the domain experts. By comparing the astronomical attributes and visualizations of the reconstructed data with the raw data, we demonstrate the effectiveness of our in-situ particle data reduction technique.
Year
DOI
Venue
2020
10.1109/PacificVis48177.2020.1186
2020 IEEE Pacific Visualization Symposium (PacificVis)
Keywords
DocType
ISSN
Human-centered computing,Visualization,Visualization application domains,Scientific visualization
Conference
2165-8765
ISBN
Citations 
PageRank 
978-1-7281-5698-9
0
0.34
References 
Authors
21
8
Name
Order
Citations
PageRank
Guan Li151.77
Jiayi Xu2515.09
Tianchi Zhang300.34
Guihua Shan4526.41
Han-Wei Shen52204148.60
Ko-Chih Wang6122.18
Shihong Liao700.34
Zhonghua Lu811.02