In this paper,we mainly discuss the influence of grey derivative and white background value to the GM(1,1) model’s precision. Investigation shows that the GM(1,1) model is very precisive when the original series change slowly and evolution parameter is tiny.
在分析GM(1,1)建模中灰导数及其白化背景值对模型精度与适应性的影响的基础上,从灰导数、灰导数的白化背景值的构造证明了原始时间序列数据变化越平缓,发展系数的绝对值越小,GM(1,1)模型的拟合与预测精度越高,模型的适应性越强,同时提出了原始序列数据的一些处理方法。
参考来源 - 灰色GM(1·2,447,543篇论文数据，部分数据来源于NoteExpress
把数值模拟和传统的边坡稳定分析方法结合起来，得出边坡的安全系数，对排土场边坡的发展趋势作出了预测。
Numerical simulation and traditional analysis of slope stability are combined to get the slope stability factor the and forecast of developing trend of actuality junkyard slope is offered.
亚洲发展银行上周三公布的一项报告显示，中国的基尼系数(衡量贫富差距的指标)从1993年的0.407上升至2004年的0.473。
A report released by the Asian Development Bank last Wednesday revealed that Chinas Gini coefficient - an indicator of the wealth divide - rose from 0.407 in 1993 to 0.473 in 2004.
微波铁氧体材料的发展趋势是宽频带、功率、损耗、温度系数。
Wide frequency band, high power, low losses and wide temperature coefficient are the developing trends of microwave ferrite materiel.
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