Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Combined Top-down and Bottom-up Approach to Multilevel Supervisory
  Control   Recently, we have proposed two complementary approaches, top-down and
bottom-up, to multilevel supervisory control of discrete-event systems. In this
paper, we compare and combine these approaches. The combined approach has
strong features of both approaches, namely, a lower complexity of the top-down
approach with the generality of the bottom-up approach. We show that, for
prefix-closed languages, a posteriori supervisors computed in the bottom-up
manner do not alter maximal permissiveness within the three-level coordination
control architecture, that is, the supremal three-level
conditionally-controllable and conditionally-normal language can always be
computed in a distributed way using multilevel coordination. Moreover, a
general polynomial-time procedure for non-prefix closed case is proposed based
on coordinators for nonblockingness and a posteriori supervisors.

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The categories of this paper are: cond-mat
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The categories of this paper are: ao-sci
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The categories of this paper are: stat
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The categories of this paper are: dg-ga
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The categories of this paper are: hep-ex
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The categories of this paper are: math-ph
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The categories of this paper are: alg-geom
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The categories of this paper are: physics
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The categories of this paper are: hep-lat
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The categories of this paper are: nucl-th
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The categories of this paper are: solv-int
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The categories of this paper are: astro-ph
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The categories of this paper are: eess
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The categories of this paper are: adap-org
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The categories of this paper are: chao-dyn
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The categories of this paper are: econ