The integral expression of the merit function was also derived to improve the calculation efficiency. The calculation result shows that the latter efficiency is 2 to 3 times of the former.
给出了用于评价光栅刻线弯曲程度的表达式，并推导出了它的积分形式，使计算效率提高了2 ~3倍。
Triple integral expression of the radiation impedance of square piston is deduced and the numerical results of the radiation impedance are calculated with the method of Gaussian numerical integral.
利用高斯数值积分方法，推导了方形活塞辐射阻抗的三重积分表达式，计算了方形活塞声源的辐射阻抗。
Triple integral expression of the radiation impedance of square piston is deduced and the numerical results of the radiation impedance are calculated with the method of Gaussian numerical integral.
利用高斯数值积分方法，推导了方形活塞辐射阻抗的三重积分表达式，计算了方形活塞声源的辐射阻抗。
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