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Z. W. Li and M. C. Zhou, “Clarifications on the Definitions of Elementary Siphons in Petri Nets,” IEEE Transactions on Systems, Man, and Cybernetics Part A: Systems and Humans, Vol. 35, No. 6, 2006, pp. 1227-1229.

has been cited by the following article:

• TITLE: Controllability of Strongly and Weakly Dependent Siphons under Disturbanceless Control

  AUTHORS: Daniel Yuh Chao, Kuo-Chiang Wu, Jiun-Ting Chen, Mike Y. J. Lee

  KEYWORDS: Petri Nets, Siphons, Controllability, FMS, S3PR

  JOURNAL NAME: Intelligent Control and Automation, Vol.2 No.4, November 4, 2011

  ABSTRACT: Li and Zhou propose to add monitors Vs to elementary siphons S only while controlling the rest of dependent siphons - important for large systems but far from being maximally permissive. The control policy for weakly dependent siphons (WDS) is rather conservative due to some negative terms in the controllability. We show that this is no longer true as can be shown that it has the same controllability as that for strongly dependent siphons.