Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: An Algebraic Approach for Identification of Linear Systems with
  Fractional Derivatives   Identification of fractional order systems is considered from an algebraic
point of view. It allows for a simultaneous estimation of model parameters and
fractional (or integer) orders from input and output data. It is exact in that
no approximations are required. Using Mikusinski's operational calculus,
algebraic manipulations are performed on the operational representation of the
system. The unknown parameters and (fractional) orders are calculated solely
from convolutions of known signals. A generalized Voigt model describing a
viscoelastic material is used to illustrate the approach.

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The categories of this paper are: physics
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The categories of this paper are: hep-th
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The categories of this paper are: mtrl-th
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The categories of this paper are: cs
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The categories of this paper are: alg-geom
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The categories of this paper are: eess
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The categories of this paper are: plasm-ph
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The categories of this paper are: q-bio
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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: chem-ph
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The categories of this paper are: funct-an
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The categories of this paper are: solv-int
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The categories of this paper are: supr-con
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The categories of this paper are: adap-org
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The categories of this paper are: dg-ga