针对采用的生物传感器内阻高、信号弱、双极性等特点，用预处理电路对模拟信号进行了变换。
A preprocessing circuit is designed for analog signal transformation because of large inner impedance of biosensor and bipolar signal.
傅立叶变换红外(FTIR)光谱技术可以对空气、生物气以及各种工业生产过程中的排气、废气进行实时在线监测。
Fourier transform infrared spectroscopy (FTIR) can be used for the continuously on-line detection of the air, biotic gas and exit gas components in industry.
在计算生物学中，常采用离散傅立叶变换进行频谱分析。
It can be taken as a kind of discrete signal and do spectrum analysis by discrete Fourier transform.
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