Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Re-ranking With Constraints on Diversified Exposures for Homepage
  Recommender System   The homepage recommendation on most E-commerce applications places items in a
hierarchical manner, where different channels display items in different
styles. Existing algorithms usually optimize the performance of a single
channel. So designing the model to achieve the optimal recommendation list
which maximize the Click-Through Rate (CTR) of whole homepage is a challenge
problem. Other than the accuracy objective, display diversity on the homepage
is also important since homogeneous display usually hurts user experience. In
this paper, we propose a two-stage architecture of the homepage recommendation
system. In the first stage, we develop efficient algorithms for recommending
items to proper channels while maintaining diversity. The two methods can be
combined: user-channel-item predictive model with diversity constraint. In the
second stage, we provide an ordered list of items in each channel. Existing
re-ranking models are hard to describe the mutual influence between items in
both intra-channel and inter-channel. Therefore, we propose a Deep \&
Hierarchical Attention Network Re-ranking (DHANR) model for homepage
recommender systems. The Hierarchical Attention Network consists of an item
encoder, an item-level attention layer, a channel encoder and a channel-level
attention layer. Our method achieves a significant improvement in terms of
precision, intra-list average distance(ILAD) and channel-wise Precision@k in
offline experiments and in terms of CTR and ILAD in our online systems.

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The categories of this paper are: hep-ph
26
The categories of this paper are: bayes-an
33
The categories of this paper are: plasm-ph
14
The categories of this paper are: math-ph
22
The categories of this paper are: chao-dyn
27
The categories of this paper are: comp-gas
31
The categories of this paper are: ao-sci
3
The categories of this paper are: physics
18
The categories of this paper are: econ
5
The categories of this paper are: gr-qc
8
The categories of this paper are: hep-ex
12
The categories of this paper are: nucl-th
10
The categories of this paper are: q-bio
37
The categories of this paper are: supr-con
9
The categories of this paper are: nlin
29
The categories of this paper are: funct-an