Grey Models for Non-equidistant Sequence Based onTrapezoid Formula and Central Difference Quotient

摘要

Being different from the typical direct modeling method and optimizing methodsof background value, we use trapezoid formula and central difference quotient methods towhiten grey derivative and propose a grey modeling method for non-equidistant sequence basedon the criteria of the minimum square error sum. The results show that the new model's fittingprecision and prediction precision is improved.