应用快速傅里叶转换(FastFourierTransform,简称FFT)技术对正常视网膜电图(Electroreti-nagram,简称ERG)进行频域分析,发现其a、b波的优势频率及能量集中在5-75Hz;与OPs波的分离点为77Hz。从而提出单纯记录a、b波及OPs波各自的较理想的通频带。
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Based on dynamic theory of system, agriculture is a complex system composed by element, structure, function and development. Firstly, this paper analyzes their