简介了频谱分析的基础理论和快速傅利叶变换(FFT)算法。

Basic theory of spectrum analysis and Fast Fourier Transform (FFT) algorithm are briefly introduced.

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利用梅林变换和傅利叶变换技巧，得到了连续支付红利的Black-Scholes期权定价模型的一新解法。

We use the theory of Mellin transformation and Fourier transformation to solve the model, then get a new pricing formula ahout it.

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本文对采集的瓷砖图像采用二维离散傅利叶变换对瓷砖颜色分布均匀度在二维频域范围内进行分析，提出了一种瓷砖颜色匀度的评判方法。

This paper introduces an analyzing method for evaluating the color even degree on the tile surface in two dimensional frequency domain, that is by adopting two dimensional discrete fourier transform.

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