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；
2
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。
3
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.