According to matrix theory, a unified interpretation is presented for both coordinate transformation and transformer transformation.

根据矩阵理论，对坐标变换和变压器变换进行了统一阐释。

youdao

The three-node beam element tangent stiffness matrix including the geometric stiffness matrix is developed according to the nonlinear finite element theory.

进而依据非线性有限元理论推导了该三结点梁单元的几何刚度矩阵的单元切线刚度矩阵；

youdao

According to the basic principles of hydromechanics and the electrical network theory, a new method named network matrix approach is presented in this paper to calculate ventilation system.

本文依据流体力学的基本原理和电路中网络理论提出一种新的通风系统计算方法——网络矩阵法。

youdao