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Alternating autoencoders for matrix completion

Abstract: 

We consider autoencoders (AEs) for matrix completion (MC) with application to collaborative filtering (CF) for recommedation systems. It is observed that for a given sparse user-item rating matrix, denoted asM, an AE performs matrix factorization so that the recovered matrix is represented as a product of user and item feature matrices. Such an AE sequentially estimates user and item feature matrices: for the item-based AE (I-AE) that uses columns of M as its input vectors, the AE’s encoder first estimates an item feature matrix and then the decoder estimates a user feature matrix based on the output of the encoder. Similarly, the user-based AE (U-AE) that uses the columns ofMT as its input vectors first estimates a user feature matrix and then an item feature matrix. This sequential estimation can degrade the performance of the MC/CF, because the decoder depends on the output of the encoder. To enhance MC/CF performance, we propose alternating AEs (AAEs), a parallel algorithm employing both I-AE and U-AE and alternatively use them. We apply the AAE to synthetic, MovieLens 100k and 1M data sets. The results demonstrate that AAE can outperform all existing MC/CF methods.

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1 user has voted: Kiwon Lee

Paper Details

Authors:
Kiwon Lee, Yong H. Lee, Changho Suh
Submitted On:
4 June 2018 - 2:48pm
Short Link:
Type:
Poster
Event:
Presenter's Name:
Kiwon Lee
Document Year:
2018
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[1] Kiwon Lee, Yong H. Lee, Changho Suh, "Alternating autoencoders for matrix completion", IEEE SigPort, 2018. [Online]. Available: http://sigport.org/3223. Accessed: Oct. 23, 2018.
@article{3223-18,
url = {http://sigport.org/3223},
author = {Kiwon Lee; Yong H. Lee; Changho Suh },
publisher = {IEEE SigPort},
title = {Alternating autoencoders for matrix completion},
year = {2018} }
TY - EJOUR
T1 - Alternating autoencoders for matrix completion
AU - Kiwon Lee; Yong H. Lee; Changho Suh
PY - 2018
PB - IEEE SigPort
UR - http://sigport.org/3223
ER -
Kiwon Lee, Yong H. Lee, Changho Suh. (2018). Alternating autoencoders for matrix completion. IEEE SigPort. http://sigport.org/3223
Kiwon Lee, Yong H. Lee, Changho Suh, 2018. Alternating autoencoders for matrix completion. Available at: http://sigport.org/3223.
Kiwon Lee, Yong H. Lee, Changho Suh. (2018). "Alternating autoencoders for matrix completion." Web.
1. Kiwon Lee, Yong H. Lee, Changho Suh. Alternating autoencoders for matrix completion [Internet]. IEEE SigPort; 2018. Available from : http://sigport.org/3223