N a fraction of a frequency 副谐波
Common attention is only given to harmonics, with other components being labeled "subharmonics" and "interharmonics."
只有谐波是经常被关注，其他成分如“分谐波”和“间谐波”常被忽略。
To describe and analyze the signals in the power net, the interharmonics and subharmonics are introduced on the basis of the original fundamental and harmonics.
为了描述和分析电网信号，在原来基波和谐波的基础上又引入了间谐波、次谐波。
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