关于压缩加权时间演化图

Wei Liu, Andrey Kan, Jeffrey Chan, J. Bailey, C. Leckie, J. Pei, K. Ramamohanarao
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引用次数: 28

摘要

现有的图形压缩技术主要集中在静态图形上。然而,对于许多实际图(如社交网络),边的权重经常随时间变化。这种现象提出了一个问题,即如何压缩动态图,同时在每个时间快照中保持其大部分固有结构模式。在本文中,我们证明了动态图的编码成本与表示动态图的三维张量的异质性成正比。我们提出了一种有效的算法,通过减少动态图张量表示的异质性来压缩动态图,同时在动态图的任何时间戳上保持最大的有损压缩误差。有界压缩误差有利于压缩图,因为它们保留了原始边缘权重的良好近似值,因此原始图的属性(如最短路径)得到了很好的保留。据我们所知,这是第一个在图的任何时间快照中压缩有界有损压缩误差的加权动态图的工作。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
On compressing weighted time-evolving graphs
Existing graph compression techniquesmostly focus on static graphs. However for many practical graphs such as social networks the edge weights frequently change over time. This phenomenon raises the question of how to compress dynamic graphs while maintaining most of their intrinsic structural patterns at each time snapshot. In this paper we show that the encoding cost of a dynamic graph is proportional to the heterogeneity of a three dimensional tensor that represents the dynamic graph. We propose an effective algorithm that compresses a dynamic graph by reducing the heterogeneity of its tensor representation, and at the same time also maintains a maximum lossy compression error at any time stamp of the dynamic graph. The bounded compression error benefits compressed graphs in that they retain good approximations of the original edge weights, and hence properties of the original graph (such as shortest paths) are well preserved. To the best of our knowledge, this is the first work that compresses weighted dynamic graphs with bounded lossy compression error at any time snapshot of the graph.
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