Based on the basic characteristic equation, two uncoupled equations for cutoff frequencies were obtained theoretically.
从基本特征方程式出发，理论上导出了两组非耦合的求解截止频率的方程式；
The propagation characteristics of this model is analyzed. Emphasis is placed on the characteristic equation of different models, the cutoff conditions and the cutoff properties of the waveguide.
分析了该模型下的传播特性，重点讨论了各类模式下的特征方程、截止的条件及波导的截止特性。
Receiver operating characteristic curve (ROC) was used to evaluate the cutoff value of S-CEA level as a predicting factor for the prognosis of CRC.
应用ROC曲线探讨CEA作为结直肠术后复发的预测指标的意义及最佳临界值的划分。
Receiver operating characteristic curve (ROC) was used to evaluate the cutoff value of S-CEA level as a predicting factor for the prognosis of CRC.
应用ROC曲线探讨CEA作为结直肠术后复发的预测指标的意义及最佳临界值的划分。
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