Acidizing fluids' type, concentration, jet pulse frequency, treatment time and interval treated may be selected according to degree of formation plugging.

该工艺可根据地层堵塞情况及程度，选择酸液种类、酸液浓度、射流脉冲频率、处理时间和处理层位。

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Methods Orthogonal experiment was designed with the content of total flavonoids as index, and with ethanol concentration, the ratio of material and solvent, extracting time and frequency as factors.

方法以乙醇体积分数、料液比、提取时间、提取次数为考察因素，以总黄酮含量为测定指标，采用正交试验优化香附总黄酮的最佳提取工艺。

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It has the properties of high time-frequency resolution and energy concentration as well as tracking instantaneous frequency etc.

它具有很高的时频分辨率、能量集中性和跟踪瞬时频率等特性。

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