摘要
根据灰色系统理论的新信息优先原理,在建模过程中赋予新信息较大的权重可以显著提高灰色建模的功效.将无偏GM(1,1)模型的初始条件由x(1)(1)改为x(1)(n),对原模型进行改进,从而提高了所建模型的模拟预测精度.通过实例验证了所建模型的实用性和可靠性.
Based on the principle in which the new information should be used fully in the grey system theory GM ( 1,1 ) , the efficacy can be significantly increased if we pay more attention to the new information or endow them more weights in the modeling process. Regarding the n-th vector (x^(1) (n)) as the initial condition instead of the first vector( x^(1)( 1 ) ), the unbiased GM ( 1,1 ) models are improved, which improve the forecasting precision. Finally, the practicability and reliability of the models are validated using examples.
出处
《南京信息工程大学学报(自然科学版)》
CAS
2009年第3期258-263,共6页
Journal of Nanjing University of Information Science & Technology(Natural Science Edition)
基金
国家统计局全国统计科研计划重点项目(2008LZ022)