Consider a step decrease of -1.0 (from 1.5 to 0.5
in jacket flowrate. The responses of the linear and nonlinear
models are shown in Figure 4. Notice that gain of the linear
model is now *less* than the gain of the nonlinear model. This is the
opposite effect from what we observed for a large increase in
the jacket flowrate.

B. Wayne Bequette, bequeb@rpi.edu