Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quantum Cascade Lasers: Electrothermal Simulation   Book chapter on multiscale electrothermal simulation of midinfrared quantum
cascade lasers. To appear in Handbook of Optoelectronic Device Modeling and
Simulation, Taylor and Francis Books, 2017. Editor: Joachim Piprek.

26
The categories of this paper are: bayes-an
6
The categories of this paper are: astro-ph
1
The categories of this paper are: cs
33
The categories of this paper are: plasm-ph
5
The categories of this paper are: gr-qc
9
The categories of this paper are: nlin
14
The categories of this paper are: math-ph
3
The categories of this paper are: physics
17
The categories of this paper are: q-fin
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The categories of this paper are: adap-org
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The categories of this paper are: acc-phys
18
The categories of this paper are: econ
32
The categories of this paper are: atom-ph
13
The categories of this paper are: quant-ph
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The categories of this paper are: cmp-lg
30
The categories of this paper are: q-alg