They should be small in number and dispersed over the range of values on any dimensional unit.
他们应该是少数，而分散在不同的单位价值在任何层面。
A new model for computation on resistance to ground of arbitrary grid is put forward in this paper, which is named 3-dimensional unit net model.
提出了一种计算任意形状接地网接地电阻的新模型三维单元网格模型。
Firstly, the paper models the multivariable discrete state-space model of the air transmission unit by the lab method, using multi-dimensional inverse m series as input stimulus signal.
首先利用多维逆m序列作为激励输入信号，用实验法建立出空气传送部分的多变量离散状态空间模型。
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