For the electrocardiogram wave form, based on the hierarchical structure, this paper presents a characteristic sample and description method.
针对心电波形，本文提出了一种基于层次结构的特征抽取和描述方法。
Optical fibre grating utilize photosensitive characteristic to form the space phase grating in the core, it can change the transmission route of the light wave in the light-transmitting fibre.
光纤光栅是利用光纤材料的光敏性，在纤芯内形成空间相位光栅，它可以改变光波在光导纤维中的传输路径。
Next, the effects of the electrical pressure of the current impulses, of their wave-form and other characteristic features, were investigated.
接着，它在电压或其他电波形式等的推动之下的效果被查明了。
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