微波萃取法可缩短萃取时间，提高提取率，但耗能大，成本高。

Microwave extraction can shorten extraction time, increase extraction yield, but energy consumption and product cost are high.

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利用单个特征识别强噪声中的弱小运动目标，常因所提取的目标特征与噪声特征易混淆而导致高的虚警率。

Recognition algorithms for small moving target in strong noise based on single feature has a high false alarm. Sometimes the features of target and noise are very alike.

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应用超声提取新技术，时间短、得率高、温度低、均一性好。

Short extracting time, high extracting rate, and fine extracting homogeneity due to the utilization of ultrasonic techniques.

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