This paper presents the fold line approximation method of discrete Fourier Series, and conducts calculation formula of harmonics.
提出了计算离散傅氏级数的折线逼近法，并导出了其幅值计算式。
The comparison of the results by using curved beam element of this paper and a broken line approximation of several straight beam elements shows that the curved beam element is much b…
按本文公式编制的曲梁单元程序的运行表明，计算一个曲梁单元和计算一个直梁单元所需的计算机时间几乎是一样的。
The expression of complex amplitude is given in reference plane vertical to the optical axis by far-field approximation when the line source and the principal axis are at any Angle.
在柱坐标下从微分波动方程出发，推导柱面光波的场分布，并利用远场近似条件导出当线光源与光轴成任意角度时，在垂直光轴方向的参考面上的复振幅表示。
Then, a span-by-span algorithm for straight line based on best approximation is deduced from these properties.
然后利用这些性质，提出了基于最佳逼近的以段为步长的直线算法。
By using transmission line theory and linear approximation of the circuit, analytical expressions are derived for the ripple due to asymmetry of input voltages and circuit elements.
采用传输线理论，在线性近似条件下推导出起因于输入电压的非对称和电路元器件非对称的纹波的解析表达式。
By using transmission line theory and linear approximation of the circuit, analytical expressions are derived for the ripple due to asymmetry of input voltages and circuit elements.
采用传输线理论，在线性近似条件下推导出起因于输入电压的非对称和电路元器件非对称的纹波的解析表达式。
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