...泰勒展开式，换元法 [gap=1731]Keywords： limit of function, the limit of a sequence, mean value theorem, rule, The Taylor expansion, replacement method ...
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An approximate solution of the paraxial ray equation for cylindrical dense electron beams was obtained by means of the Taylor expansion.
本文提出圆柱形强流电子束的傍轴轨迹方程，可以用台劳展开求出它的近似解。
By means of the Taylor expansion technique, the asymptotic expressions of the dispersion curves at the long wavelength region were derived for flexural and longitudinal vibration modes.
利用泰勒展开技术，给出了长波区域弯曲振动模式和伸缩振动模式的弥散曲线渐近表达式；
To resolve the difficulty of progressive time calculating in normal inverse-time overcurrent curve, two algorithms of zonal table-lookup and Taylor expansion are put forward.
然后针对计算比较困难的一般反时限曲线，介绍了分区查表和泰勒展开法计算时延累加量的算法。
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