This paper proposes a key point to improve the empirical mode decomposition algorithm. Recent works have demonstrated that EMD has remarkable effect in many applications, but EMD also has many problems. By analyzing the simulated and actual signals, it is confirmed that the IMFs get by the bandwidth criterion can approach the real components and reflect the intrinsic information of the analyzed signal. The paper not only updates the bandwidth criterion of the empirical mode decomposition algorithm, but also uses it on one data of the electric consumption data to extract some periodic rules. Based on the decomposition result, we obtain three conclusions which can instruct electricity production.
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