傅里叶变换
傅里叶变换（法语：Transformation de Fourier、英语：Fourier transform）是一种线性积分变换，用拉信号拉时域（或空域）搭频域之间个变换，拉物理学搭工程学中有交关多应用。因渠个基本思想首先由法国学者约瑟夫·傅里叶系统个提出，所以以渠个名字来命名以示纪念。实际上傅里叶变换就像化学分析，确定物质个基本成分；信号来自自然界，也可对渠进行分析，确定渠基本成分。
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