Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: ExpFinder: An Ensemble Expert Finding Model Integrating $N$-gram Vector
  Space Model and $\mu$CO-HITS   Finding an expert plays a crucial role in driving successful collaborations
and speeding up high-quality research development and innovations. However, the
rapid growth of scientific publications and digital expertise data makes
identifying the right experts a challenging problem. Existing approaches for
finding experts given a topic can be categorised into information retrieval
techniques based on vector space models, document language models, and
graph-based models. In this paper, we propose $\textit{ExpFinder}$, a new
ensemble model for expert finding, that integrates a novel $N$-gram vector
space model, denoted as $n$VSM, and a graph-based model, denoted as
$\textit{$\mu$CO-HITS}$, that is a proposed variation of the CO-HITS algorithm.
The key of $n$VSM is to exploit recent inverse document frequency weighting
method for $N$-gram words and $\textit{ExpFinder}$ incorporates $n$VSM into
$\textit{$\mu$CO-HITS}$ to achieve expert finding. We comprehensively evaluate
$\textit{ExpFinder}$ on four different datasets from the academic domains in
comparison with six different expert finding models. The evaluation results
show that $\textit{ExpFinder}$ is a highly effective model for expert finding,
substantially outperforming all the compared models in 19% to 160.2%.

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The categories of this paper are: chem-ph
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The categories of this paper are: adap-org
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The categories of this paper are: astro-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: chao-dyn
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The categories of this paper are: supr-con
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The categories of this paper are: nlin
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The categories of this paper are: dg-ga
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The categories of this paper are: nucl-ex
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The categories of this paper are: quant-ph
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The categories of this paper are: hep-ex
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The categories of this paper are: physics
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The categories of this paper are: econ
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The categories of this paper are: patt-sol
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The categories of this paper are: gr-qc
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The categories of this paper are: hep-ph