• Article  

      Rank-invariant transformations and controllability of large-scale systems 

      Schizas, Christos N.; Evans, F. J. (1980)
      The relevance of structure to the exact determination of rank in large-scale systems is discussed, with particular reference to state transformations and the conditions for controllability (observability). The structural ...
    • Article  

      The structural aspects of pole assignment 

      Evans, F. J.; Schizas, Christos N. (1981)
      The ability to assign the poles of a mult.ivur-inble system, even under an imposed set of constraints (e.g. decentralized control) is shown to reside completely in structural properties made explicit in the system digraph. ...