【Key words】 Optical Imaging； Functional Brain； Intrinsic Signals； Mapping Signal； Visual Cortex； Low Frequency Vibration； Cycle Correlation；
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When study the brain function construction, the signals collected by the optical imaging are called intrinsic signals.
在研究脑的功能构筑时，利用光学成像所采集到的信号称为本征信号(IntrinsicSignals)。
参考来源 - 脑神经映射模式检测方法研究·2,447,543篇论文数据，部分数据来源于NoteExpress
信号的局部能量和瞬时频率都可以从其本征模函数中推导出来。
The local energy and instantaneous frequency of the signal can be derived from the IMFs.
当信号的频率接近其本征振荡频率时，神经元产生的平均发放率较大，输入信号就能被有效地处理和放大。
When the frequency of input approaches that of the intrinsic oscillation, the mean firing rate induced is bigger, the input signal can be effectively processed and amplified.
利用快速滤波建立了一种对信号进行本征模态函数分解的全新方法。
A new method is introduced to decompose a signal into a set of IMFs (Intrinsic Mode Function) by virtue of fast band-pass filtering.
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