从被淹没在数十微伏的自发脑电背景中单次提取微伏级的视觉诱发电位，是脑-计算机接口的核心问题之一。
One of the key issues in a brain computer interface is to single-trial estimate the visual evoked potentials which embedded in ongoing spontaneous Electroencephalogram(EEG) background.
背景：急性胆囊炎是临床常见病症，并易诱发急性胰腺炎。
Background: acute cholecystitis is a common disease in clinic, and easily induces acute pancreatitis.
传统的化学诱变方法，能诱发产生高密度的点突变，获得遗传背景相似的突变体。
The traditional method of chemical mutagenesis can produce high-density induced mutations with similar genetic background.
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