The approximate solution is proved effective by comparing with numerical result.
通过与数值解结果的比较，说明近似解是有效的。
The iteration method is applied to seek the approximate solution of the hybrid system.
用逐次近似法寻求混合系统的近似解。
The approximate solution of infinitely long plane strip is obtained by the method of energy.
用能量法求得了无限长条板的近似解。
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