They could be power series relations, neural networks, first-order-plus-delay, finite impulse response models, or such. Again, nonlinear optimization is used with a quadratic-ish OF. Trends and ...

Xin-wei Liu, Ya-xiang Yuan, A ROBUST TRUST REGION ALGORITHM FOR SOLVING GENERAL NONLINEAR PROGRAMMING, Journal of Computational Mathematics, Vol. 19, No. 3 ... which solves an unconstrained piece wise ...

Werner Dinkelbach, On Nonlinear Fractional Programming, Management Science, Vol. 13, No. 7, Series A, Sciences (Mar., 1967), pp. 492-498. ... for linear fractional programming and to the quadratic ...

Analytics software leader FICO today announced the release of a true global mathematical optimization solver as part of FICO® Xpress 9.2 Optimization.