Time sequence dimensionality reduction representation method and system

The invention discloses a time sequence dimensionality reduction representation method and system, and the method comprises the following steps: traversing a time sequence, and recognizing the top and bottom features of the time sequence; segmenting the time sequence into a plurality of simplified line segments based on the top and bottom features, and recording start and end points of the plurality of simplified line segments; calculating characteristic values of the plurality of simplified curves based on the start and end points; and respectively calculating the difference between the characteristic values of the simplified line segment and the adjacent segment, and if the difference is smaller than a preset threshold value, merging the line segment and the adjacent segment to complete dimension reduction representation. By means of the dimension reduction mode, the dimension reduction work of the variable-length variable-amplitude time sequence can be completed under the condition that the time sequence f