Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: RSL19BD at DBDC4: Ensemble of Decision Tree-based and LSTM-based Models   RSL19BD (Waseda University Sakai Laboratory) participated in the Fourth
Dialogue Breakdown Detection Challenge (DBDC4) and submitted five runs to both
English and Japanese subtasks. In these runs, we utilise the Decision
Tree-based model and the Long Short-Term Memory-based (LSTM-based) model
following the approaches of RSL17BD and KTH in the Third Dialogue Breakdown
Detection Challenge (DBDC3) respectively. The Decision Tree-based model follows
the approach of RSL17BD but utilises RandomForestRegressor instead of
ExtraTreesRegressor. In addition, instead of predicting the mean and the
variance of the probability distribution of the three breakdown labels, it
predicts the probability of each label directly. The LSTM-based model follows
the approach of KTH with some changes in the architecture and utilises
Convolutional Neural Network (CNN) to perform text feature extraction. In
addition, instead of targeting the single breakdown label and minimising the
categorical cross entropy loss, it targets the probability distribution of the
three breakdown labels and minimises the mean squared error. Run 1 utilises a
Decision Tree-based model; Run 2 utilises an LSTM-based model; Run 3 performs
an ensemble of 5 LSTM-based models; Run 4 performs an ensemble of Run 1 and Run
2; Run 5 performs an ensemble of Run 1 and Run 3. Run 5 statistically
significantly outperformed all other runs in terms of MSE (NB, PB, B) for the
English data and all other runs except Run 4 in terms of MSE (NB, PB, B) for
the Japanese data (alpha level = 0.05).

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The categories of this paper are: comp-gas
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The categories of this paper are: atom-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: q-fin
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The categories of this paper are: math
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The categories of this paper are: plasm-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: q-bio
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The categories of this paper are: cmp-lg
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The categories of this paper are: supr-con
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The categories of this paper are: funct-an
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The categories of this paper are: alg-geom
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The categories of this paper are: hep-lat
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The categories of this paper are: econ
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The categories of this paper are: hep-ph
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The categories of this paper are: astro-ph