Then we provide a rigorous and sound theoretical basis of variational finite element method and boundary element method for calculating the accurately fundamental equations.
从而为求取较为精确的入水冲击问题基本方程的变分有限元及边界元方法奠定了严密的理论基础。
The equivalent conditions are discussed and theoretical formulas of the equivalent inner diameter and length are derived from the fundamental momentum and energy equations.
探讨了实现等价替代的条件，并据此导出了当量毛细管内径和长度的精确计算公式。
The equivalent conditions are discussed and theoretical formulas of the equivalent inner diameter and length are derived from the fundamental momentum and energy equations.
探讨了实现等价替代的条件，并据此导出了当量毛细管内径和长度的精确计算公式。
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