Multivariable non-equidistance GM(1,m) model and its application

For multivariable non-equidistance sequence,a grey forecast model GM(1,m) is established.Based upon the exponential trait of the grey model and the definition of integral,a construction method of the GM(1,m) model's background value of multivariable non-equidistance sequence is put forward.Moreover,the GM(1,m) model's fitting precision and prediction precision are advanced and the scope of application is enlarged.As the application,a forecast model of growth level of China countrysied teenagers is established.By the realistic example,the result is proved to be precise and reliable.