According to thermal conduction formulation and thermal radiation boundary terms, the formula to calculate the depth of the internal defect in concrete is theoretically put forward and the available range and terms of the formula are established. 根据热传导方程和热辐射边界条件(BT)从理论上建立了计算混凝土内部缺陷深度公式和确立了该公式适用范围及条件。
Natural boundary conditions were constructed by analyzing boundary terms of variational principle, and further variational principle of pseudo-potential function for calculating two-dimension flow field was derived. 通过对变分边界项的分析,构造出了自然边界条件(BT),进而得出计算二维流场的赝势函数变分原理。
This essay makes use of approximate boundary of circling to get circling correction absorption boundary terms and has good absorption results. 本文利用旋转pade近似边界得到旋转校正吸收边界条件(BT),具有良好的吸收效果。
The boundary integral terms of variational principle are cancelled mutually for the adjacent elements. 变分原理的边界积分项对于相邻单元互相抵消。
In this paper, a study is made to construct singular perturbation solution of boundary-value problem for a second-orde quasilinear differential-difference equation. The formall asymptotic solution is obtained by the step-by-step method and constructing the boundary layer terms. 本文利用逐步求解和构造边界层校正项的方法,构造了二阶拟线性微分差分方程边值问题的奇摄动解,得到了形式渐近解。