Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Structural analysis of high-index DAE for process simulation   This paper deals with the structural analysis problem of dynamic lumped
process high-index DAE models. We consider two methods for index reduction of
such models by differentiation: Pryce's method and the symbolic differential
elimination algorithm rifsimp. Discussion and comparison of these methods are
given via a class of fundamental process simulation examples. In particular,
the efficiency of the Pryce method is illustrated as a function of the number
of tanks in process design.

11
The categories of this paper are: hep-lat
6
The categories of this paper are: astro-ph
33
The categories of this paper are: plasm-ph
20
The categories of this paper are: acc-phys
8
The categories of this paper are: hep-ex
9
The categories of this paper are: nlin
12
The categories of this paper are: nucl-th
37
The categories of this paper are: supr-con
31
The categories of this paper are: ao-sci
30
The categories of this paper are: q-alg
4
The categories of this paper are: cond-mat
29
The categories of this paper are: funct-an
2
The categories of this paper are: math
35
The categories of this paper are: mtrl-th
23
The categories of this paper are: solv-int
32
The categories of this paper are: atom-ph