五个待定参数用零温零压下晶体的总能、三个二阶弹性常数以及晶格常数的实验值确定。
Five undetermined parameters are determined by experimental data of the total energy, three second order elastic constants and the lattice constant of the crystal at o K and zero pressure.
应用作者提出的二阶势理论，本文研究了各向同性弹性介质中P波与SV波的非线性相互作用，得到了相互作用波的表达式。
Using the second-order potential theory proposed by the author, this paper gives an investigation to the nonlinear interaction of P and SV waves in isotropic elastic media.
本文引用系统主回路分析的新方法—回路增益弹性法对大信号下反馈放大电路的行为特性进行讨论，并通过分析一个二阶反馈放大电路给出一般分析方法和步骤。
In this paper, A new method of system main loop analysis is quoted to analyse the behaviour characteristic of feedback amplifier with large signal, A ordinary analysis method and steps are given.
钢筋混凝土结构考虑二阶效应的非线弹性强度性能和非线弹性稳定性能的理论认识对工程设计具有重要的指导意义。
The guidance of theoretic recognition to second-order effect about nonlinear strength and stability characteristics becomes more important for RC members in structural design.
在三维弹性力学边界元法的基础上，推导出二阶单元的基本解快速多极展开格式。
The three-dimensional boundary element method for elastic materials was extended to develop a fast multipole expansion formulation of the fundamental solutions for quadratic elements.
分析和研究地应力弹性二阶张量场的可视化技术。
The visualization techniques of 3D tensor field in geostress were analyzed and studied.
以二阶张量为损伤变量，推导了依赖于损伤变量的弹性模量表达式，利用一个等价状态，建立损伤岩体的本构关系。
Then the expression of damage-dependent elasticity tensor is deduced and the constitutive equations of damaged rock are built by using an equivalent state.
采用时间上二阶、空间上高阶近似的交错网格高阶差分公式求解三维弹性波位移-应力方程，并在计算边界处应用基于傍轴近似法得到的三维弹性波方程吸收边界条件。
Here, we use second-order, temporal - and high-order spatial finite-difference formulations with a staggered grid for discretization of the 3-d elastic wave equations of motion.
采用时间上二阶、空间上高阶近似的交错网格高阶差分公式求解三维弹性波位移-应力方程，并在计算边界处应用基于傍轴近似法得到的三维弹性波方程吸收边界条件。
Here, we use second-order, temporal - and high-order spatial finite-difference formulations with a staggered grid for discretization of the 3-d elastic wave equations of motion.
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