Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Genetic Meta-Structure Search for Recommendation on Heterogeneous
  Information Network   In the past decade, the heterogeneous information network (HIN) has become an
important methodology for modern recommender systems. To fully leverage its
power, manually designed network templates, i.e., meta-structures, are
introduced to filter out semantic-aware information. The hand-crafted
meta-structure rely on intense expert knowledge, which is both laborious and
data-dependent. On the other hand, the number of meta-structures grows
exponentially with its size and the number of node types, which prohibits
brute-force search. To address these challenges, we propose Genetic
Meta-Structure Search (GEMS) to automatically optimize meta-structure designs
for recommendation on HINs. Specifically, GEMS adopts a parallel genetic
algorithm to search meaningful meta-structures for recommendation, and designs
dedicated rules and a meta-structure predictor to efficiently explore the
search space. Finally, we propose an attention based multi-view graph
convolutional network module to dynamically fuse information from different
meta-structures. Extensive experiments on three real-world datasets suggest the
effectiveness of GEMS, which consistently outperforms all baseline methods in
HIN recommendation. Compared with simplified GEMS which utilizes hand-crafted
meta-paths, GEMS achieves over $6\%$ performance gain on most evaluation
metrics. More importantly, we conduct an in-depth analysis on the identified
meta-structures, which sheds light on the HIN based recommender system design.

18
The categories of this paper are: econ
14
The categories of this paper are: math-ph
5
The categories of this paper are: gr-qc
15
The categories of this paper are: nucl-ex
33
The categories of this paper are: plasm-ph
20
The categories of this paper are: acc-phys
25
The categories of this paper are: patt-sol
7
The categories of this paper are: hep-th
6
The categories of this paper are: astro-ph
29
The categories of this paper are: funct-an
0
The categories of this paper are: hep-ph
11
The categories of this paper are: hep-lat
2
The categories of this paper are: math
32
The categories of this paper are: atom-ph
26
The categories of this paper are: bayes-an
9
The categories of this paper are: nlin