After checking the fitness of each line segments, we can quickly mine the similar sub-sequence with pattern distance measurement and quick pruning method.

• 为此提出时间序列变化关键点的概念，以检索出的关键点为边界分割时间序列，线性拟合各分割的子序列，计算查询序列和各子序列的形态距离，快速搜索出相似子序列。