Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Surrogate data for non-stationary signals   Standard tests for nonlinearity reject the null hypothesis of a Gaussian
linear process whenever the data is non-stationary. Thus, they are not
appropriate to distinguish nonlinearity from non-stationarity. We address the
problem of generating proper surrogate data corresponding to the null
hypothesis of an ARMA process with slowly varying coefficients.

26
The categories of this paper are: bayes-an
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The categories of this paper are: comp-gas
30
The categories of this paper are: q-alg
19
The categories of this paper are: eess
37
The categories of this paper are: supr-con
15
The categories of this paper are: nucl-ex
4
The categories of this paper are: cond-mat
3
The categories of this paper are: physics
25
The categories of this paper are: patt-sol
8
The categories of this paper are: hep-ex
16
The categories of this paper are: stat
33
The categories of this paper are: plasm-ph
32
The categories of this paper are: atom-ph
17
The categories of this paper are: q-fin
12
The categories of this paper are: nucl-th
35
The categories of this paper are: mtrl-th