Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: RecTen: A Recursive Hierarchical Low Rank Tensor Factorization Method to
  Discover Hierarchical Patterns in Multi-modal Data   How can we expand the tensor decomposition to reveal a hierarchical structure
of the multi-modal data in a self-adaptive way? Current tensor decomposition
provides only a single layer of clusters. We argue that with the abundance of
multimodal data and time-evolving networks nowadays, the ability to identify
emerging hierarchies is important. To this effect, we propose RecTen, a
recursive hierarchical soft clustering approach based on tensor decomposition.
Our approach enables us to: (a) recursively decompose clusters identified in
the previous step, and (b) identify the right conditions for terminating this
process. In the absence of proper ground truth, we evaluate our approach with
synthetic data and test its sensitivity to different parameters. We also apply
RecTen on five real datasets which involve the activities of users in online
discussion platforms, such as security forums. This analysis helps us reveal
clusters of users with interesting behaviors, including but not limited to
early detection of some real events like ransomware outbreaks, the emergence of
a blackmarket of decryption tools, and romance scamming. To maximize the
usefulness of our approach, we develop a tool which can help the data analysts
and overall research community by identifying hierarchical structures. RecTen
is an unsupervised approach which can be used to take the pulse of the large
multi-modal data and let the data discover its own hidden structures by itself.

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The categories of this paper are: patt-sol
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The categories of this paper are: math-ph
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The categories of this paper are: hep-ph
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The categories of this paper are: q-alg
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The categories of this paper are: supr-con
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The categories of this paper are: chao-dyn
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The categories of this paper are: math
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The categories of this paper are: solv-int
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The categories of this paper are: chem-ph
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The categories of this paper are: quant-ph
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The categories of this paper are: q-fin
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The categories of this paper are: hep-lat
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The categories of this paper are: comp-gas
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The categories of this paper are: physics
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The categories of this paper are: astro-ph
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The categories of this paper are: hep-th