Efficient processing node proximity via random walk with restart

Lv, Bingqing, Yu, Weiren, Wang, Liping and McCann, Julie A. (2014). Efficient processing node proximity via random walk with restart. IN: Web Technologies and Applications. Chen, Lei; Jia, Yan; Sellis, Timos and Liu, Guanfeng (eds) Lecture Notes in Computer Science . Cham (CH): Springer.

Abstract

Graph is a useful tool to model complicated data structures. One important task in graph analysis is assessing node proximity based on graph topology. Recently, Random Walk with Restart (RWR) tends to pop up as a promising measure of node proximity, due to its proliferative applications in e.g. recommender systems, and image segmentation. However, the best-known algorithm for computing RWR resorts to a large LU matrix factorization on an entire graph, which is cost-inhibitive. In this paper, we propose hybrid techniques to efficiently compute RWR. First, a novel divide-and-conquer paradigm is designed, aiming to convert the large LU decomposition into small triangular matrix operations recursively on several partitioned subgraphs. Then, on every subgraph, a “sparse accelerator” is devised to further reduce the time of RWR without any sacrifice in accuracy. Our experimental results on real and synthetic datasets show that our approach outperforms the baseline algorithms by at least one constant factor without loss of exactness.

Divisions: Engineering & Applied Sciences
Event Title: 16th Asia-Pacific Web Conference
Event Type: Other
Event Dates: 2014-09-05 - 2014-09-07
Published Date: 2014
Authors: Lv, Bingqing
Yu, Weiren
Wang, Liping
McCann, Julie A.

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Version: Accepted Version


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