Because of their multi scale characteristic, it's impossible to characterize machined surfaces objectively with statistic parameters measured by a measuring instrument of limited resolution.

机加工表面的多重尺度特征导致在一定分辨率测量条件下所测得的统计参数不能客观地反映被测表面的特征。

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The result above shows that it is significant to apply the multi-fractal characteristic in mid-strong earthquake prediction of one year to one and half year scale in this area.

上述结果说明利用地震时序的多标度分形特征对于该地区的半年至一年尺度的中强地震预报是有意义的。

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Load system of the large scale power plant's unit as well, is a multi-variable nonlinear dynamic system, and the dynamic characteristic will change with the different operating condition.

同样，大型火电机组的负荷系统是一个多变量非线性动态系统，它的动态特性随工况的变化而大范围变化。

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