本文应用谐波分析法分析了圆度误差，提出了一种圆度误差的简便分析方法，最后讨论了快速富里叶变换的应用。
Using harmonic analysis, the roundness error is analysed. A handy analytical method of roundness error is presented. Then the application of FFT is discussed.
《仕女》图色彩清雅，线条细劲清圆具木刻味，形式富装饰性。
The Elegant Ladies is graceful in color, with fine, vigorous, clear and smooth lines typical of woodcarvings, thus an excellent form for decoration.
针对圆梁山隧道高压富水区的岩溶水分布特点，确定了合理的注浆范围和注浆参数。
The suitable grouting parameters for Yuanliangshan tunnel. are verified by analyzing particular karst aquifers within high pressure and rich water zone.
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