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。
This paper presents the fold line approximation method of discrete Fourier Series, and conducts calculation formula of harmonics.
本文介绍了一种用五段折线逼近传感器非线性特性的开环补偿方法。
An opening loop compensation method to approach sensor's nonlinearity characteristic by using five straight-lines is introduced in this paper.
首先通过对建筑物边缘进行折线逼近和感知编组，可以得到其顶部大体结构。
We arrange the line segments of (building's) edges to reconstruct the structure of the building roof by means of line closing and perceptual organization method first.
第四章中首先分析曲线带锯的锯切工艺，之后我们给出了用折线逼近NURBS的理论基础并且我们给出了误差分析。
In fourth chapter, firstly we analyze theory of curve saw working and give a theory, which approach NURBS by lines.
分析了徒手画曲线的性质，提出了徒手画曲线的主曲线概念，并提供了一种搜索该主曲线的折线逼近算法，自适应地得到主曲线；
This paper analyzed the character of sketch curve and developed the concept of principal curve of sketch curve, and provided an adaptive algorithm by polygonal line for approximating principal curve.
分析了徒手画曲线的性质，提出了徒手画曲线的主曲线概念，并提供了一种搜索该主曲线的折线逼近算法，自适应地得到主曲线；
This paper analyzed the character of sketch curve and developed the concept of principal curve of sketch curve, and provided an adaptive algorithm by polygonal line for approximating principal curve.
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