{TAIL ~ A correction algorithm}, in the form of a model control loop allows {HEAD ~ permanent improvement} of accuracy when the model parameters are inexact 
{ TAIL ~ A correction algorithm } , in the form of a model control loop allows { HEAD ~ permanent improvement } of accuracy when the model parameters are inexact
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH