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中文摘要：
在经验模式分解的基础上，根据多分量信号的一些特点，分析了多分量信号的数学基础．并从信号的瞬时频率和瞬时带宽出发，提出了基于带宽的停止准则，改进了筛算法．将该算法应用于电力数据分析，得到电力消费分解数据，并在此数据上得到关键性的结论，以指导电力分配．
英文摘要：
According to the empirical decomposition algorithm and characteristic of multi-component signal, the mathematical foundation of the multi-component signal is investigated. Based on the instantaneous frequency and instantaneous bandwidth, a new stop criterion is proposed to improve the sifting algorithm, which is founded on the bandwidth of signal. The algorithm is applied to obtain decomposition data of the electricity consumption. Based on the decomposition data, some crucial conclusions are obtained and they can instruct the electricity assignment.
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