ocr: l PH : namal and martive chango Cumant pH: deta pHa partive viva poaition p. - aloe s7 LE - MHEP da - postvs, neggbie ornegaine DE FU controlerOuiput FUZAFICATION RULE NFOALNGING DEFVZIFICATION Figure 2. Fuzzy logic system for nonlinear pH control.