Estimate-convergence graph for software development, taken from Lecture 3, entitled "Software Schedule Estimation, " in the lecture notes section. (Image courtesy of MIT OCW. )

软体开发的预估收敛图， 取自课堂讲稿第三课，讲题为「预估软体开发的时程」。（图片由麻省理工学院「开放式课程网页」提供）

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The paper put forward a new improved least mean square algorithms which is on the basis of the fundamental of convergence step and the graph connection between error and step.

本文根据现有的步长调整原则，利用误差和步长关系曲线特点，提出了新的变步长最小均方算法。

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