脉冲重复频率;重发频率
The effect is studied of historical floods and the estimation errors of their recurrence intervals on the calculated results of flood frequency, and the different results under different curve fitting criteria are discussed.
探讨了历史洪水及其重现期的误差对洪水频率计算成果的影响及不同适线准则下计算结果的差别。
You can treat some tumor recurrence transplantation by radio frequency ablation.
有些复发肿瘤可以用射频消融治疗.
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