Yu, Changbin (Brad)2015-12-10August 24-9783902823625http://hdl.handle.net/1885/69643In this paper, we investigate model reduction for positive linear time-invariant systems in the H<inf>∞</inf> sense. First, the bounded real lemma is further developed to obtain a new characterization of the H<inf>∞</inf> performance, which does not i20142015-12-10