Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the Numerical Treatment of Interlaced Target Values -- Modeling,
  Optimization and Simulation of Regulating Valves in Gas Networks   Due to the current and foreseeable shifts in energy production, the trading
and transport operations of gas will become more dynamic, volatile, and hence
also less predictable. Therefore, computer-aided support in terms of rapid
simulation and control optimization will further broaden its importance for gas
network dispatching. In this paper, we aim to contribute and openly publish two
new mathematical models for regulators, also referred to as control valves,
which together with compressors make up the most complex and involved types of
active elements in gas network infrastructures. They provide full direct
control over gas networks but are in turn controlled via target values, also
known as set-point values, themselves. Our models incorporate up to six
dynamical target values to define desired transient states for the elements'
local vicinity within the network. That is, each pair of every two target
values defines a bounding box for the inlet pressure, outlet pressure as well
as the passing mass flow of gas. In the proposed models, those target values
are prioritized differently and are constantly in competition with each other,
which can only be resolved dynamically at run-time of either a simulation or
optimization process. Besides careful derivation, we compare simulation and
optimization results with predictions of the commercial simulation tool SIMONE.

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The categories of this paper are: quant-ph
6
The categories of this paper are: astro-ph
27
The categories of this paper are: comp-gas
18
The categories of this paper are: econ
36
The categories of this paper are: cmp-lg
9
The categories of this paper are: nlin
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The categories of this paper are: adap-org
14
The categories of this paper are: math-ph
29
The categories of this paper are: funct-an
23
The categories of this paper are: solv-int
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The categories of this paper are: nucl-ex
1
The categories of this paper are: cs
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The categories of this paper are: q-bio
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The categories of this paper are: q-fin
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The categories of this paper are: cond-mat
37
The categories of this paper are: supr-con