Patent ID: 11914936
Assignee: WUHAN UNIVERSITY
Field: Computer technology (Electrical engineering)
Classification: CPC G  H | IPC G

Claim 1:
2. The method according to claim 1, wherein the step of performing the EMD on the original concentration time series to obtain the IMF components and 1 remaining component in step 2 comprises:
step a of obtaining both all maximum points and all minimum points in the original concentration time series, obtaining an upper envelope of all of the maximum points and a lower envelope of all of the minimum points, obtaining an envelope mean value of the upper envelope and the lower envelope;
step b of obtaining a difference value between the original concentration time series and the envelope mean value;
step c of determining whether the difference value satisfies an IMF constraint condition, wherein the difference value is treated as a new input time series if no is determined, and step a and step b are performed until a finally obtained target difference value satisfies the IMF constraint condition, treating the target difference value as a first IMF component, separating the target difference value from the original concentration time series, obtaining a remaining component;
step d of treating the remaining component as a new original concentration time series, repeatedly performing step a to step c, obtaining the rest of the IMF components and 1 final target remaining component.