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由信号的谱矩描述出发,对于随时间缓变的噪声过程,提出了演变矢量描述,可以反映信号主要性质的演变特性,并将演变矢量描述应用于飞机飞过噪声。
Starting from the description of the signal spectrum, an evolution vector description is proposed for the noise process with the gradual change over time, which can reflect the evolution characteristics of the signal’s main properties and apply the evolution vector description to the aircraft over-noise.