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基础视角分别对给付型和非给付型不当得利的物权变原因进行分析，重新构建其构成要件。

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

文中介绍于结构构件静力分析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、热传导和空间等参元。