So, we must analyze the causes of prestation unjustified enrichment and non-prestation unjustified enrichment and reconstruct its constitutive requirements.

因此，应该从不当得利制度的物权变动理论基础视角别对和非不当得利的物权变动原因进行，新构建其构成要件。

Based on the constitutive theory of thermoelasticity , the theory of conduction of heat in solids and the three-dimensional equal parameter element method.

文中介绍了适用于结构构件静力的有限元程序设计方法,其依据一般热弹性材料的本构方程、热传导理论和空间等参元理论。