演示验证线性相关算法，主要用于离散点的局部极小值提取（基于多种阈值选取）。还包括最小二乘拟合，三次样条插值等内容。-Demonstration Verification Linear correlation algorithm is mainly used for local minimum extraction of discrete points (based on a variety of threshold selection). Including least squares fitting, cubic spline interpolation and so on.