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的分布可描述为各态历经的平稳的随机过程。

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

假设上下功能梯度层的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的。