This paper proposes an approach to implement function fitting by multiple factors named MFF(Multiple Factor Fitting)based on GEP(Gene Expression Programming).

After the comparison between the parameter averaging method and the multi-curve fitting method,it is found that the latter is much better for load model synthesis because of the multi-value characteristic in identification.

The useful life of engineering plastics was predicted within the storage period using a polynomial fitting curve method,and its storage life deadline was inspected.

Designing the submergence depth of sucker rod pump with curve fitting;

Ultrasound contrast quantitative analyzing based on curve fitting algorithm;

The curve fitting applies in AIDS therapy appraisal and in the curative effect forecast;

Flight Simulation and Curve-fitting for the Characteristics of Aircraft;

Curve-fitting in Designing Magnetic Steel of PM Electrical Machine;

This paper deduces the formulas about capacitance and voltage when the pretilt angle isn't zero, and presents the method to determine the elastic constants k11 and k33 simultaneously by curve-fitting.