Based on the test, the conclusion is that the causality and linear functional relation are existed between rock and AC impedance spectra. AC impedance can disclose the properties of rocks.
岩石的种类和岩样的物理状态与交流阻抗谱之间具有因果关系和线性函数关系，可以通过交流阻抗谱特征来研究岩石的物理性质。
At the same time, due to the non-linear condition of time sequence, conventional linear Vector Autoregressive model can hardly characterize the causality among economic variables correctly.
同时由于时间序列的非线性，常规的线性向量自回归模型难以正确描述经济变量之间的因果关系。
At the same time, due to the non-linear condition of time sequence, conventional linear Vector Autoregressive model can hardly characterize the causality among economic variables correctly.
同时由于时间序列的非线性，常规的线性向量自回归模型难以正确描述经济变量之间的因果关系。
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