The effect of imposing natural boundary condition as constraints is considered and it is shown by a plate bending problem that this effect is quite superficial.
文中对自然边界条件作为约束条件的影响给予了考虑，并以板的弯曲问题为例说明影响极微。
The characteristic of this model is only to know basic and natural boundary condition, then the stream function and flow velocity required on the boundary are obtained.
这一模型的特点只需要知道边界上的基本边界条件和自然边界条件，就可以得到边界上所需要求的流函数和水流速度；
The boundary condition differences between natural power and artificial driven fracturing in hydraulic and hydroelectric engineering are presented.
分析了水利水电等工程中的水力劈裂与人工致裂边界条件的不同。
Part I, the artificial boundary condition and its numerical methods based on natural boundary reduction for hyperbolic initial boundary value problems on unbounded domains is studied.
第一部分，研究无界外区域双曲型初边值问题基于自然边界归化的人工边界条件及其数值方法。
The boundary condition of restriction and the natural condition of variation for the virtual principle of displacement are given too.
明确了虚位移原理的变分约束条件和变分自然条件。
The boundary condition of restriction and the natural condition of variation for the virtual principle of displacement are given too.
明确了虚位移原理的变分约束条件和变分自然条件。
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