金银花茶中微量元素的溶出特性研究 关键词：火焰原子吸收法，金银花茶，微量元素，溶出特性 [gap=936]Key words：FAAS；Lonicera japonica tea；trace element；extracting characteristics
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Extracting precisely the vibration signals' characteristics in time and frequency of typical faults is a key to mechanical failure diagnosis.
准确地提取各种典型故障的振动信号的时频域特征是进行机械故障诊断的关键。
Extracting precisely the vibration characteristics of typical gearbox faults is a key to its diagnosis.
准确地提取各种典型故障的特征是进行齿轮箱故障诊断的关键。
Extracting of radar in-pulse characteristics is an important technology to sort and recognize intercept signal from the radar countermeasure systems.
信号脉内特征提取技术是雷达对抗系统分选、识别截获信号的关键技术。
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