The distribution of inhomogeneous thermo-emf along the copper-iron thermoelectrode is described as a stationary ergodic random process.

不均匀热电势沿铜铁合金热电极长度上分布可描述为各平稳随机过。

The functionally graded layers are inhomogeneous along the thickness direction, while the piezoelectric layer is homogeneous;both possess material orthotropy.

上下功能梯度层材料参数沿厚度连续变化，而压电层则是均匀材料，并且它们都是正交各向异性。