93-01 aeronautics astronautics automaticcontrol automaticcontrolengineering biologicalcontrolsystems biologicalmodels biologicalsystems computernetworks controlsystems controltheory datatransmissionsystems designandconstruction discrete-timesystems dynamicprogramming economics eigenvalues electrical electronic engineering feedback general histology industrialarts materials mathematicalmodels mathematicaloptimization mathematics mechanicalengineering medical mètodesestadístics nonlinearcontroltheory nonlinearsystems physiologicalfeedback predictiontheory probability robotics science/mathematics sistemesdecontrol stability statistics systemanalysis systemsbiology systèmesàréaction technology time-seriesanalysis tj216b788t1976 transferfunctions waveequation