用fortran语言编程求解规则五边形波导的截止波数和截止频率-Fortran programming language used for solving the cut-off rules for pentagonal waveguide wave number and cutoff frequency

A Two fluid Electromagnetic Plasma Simulation Fortran 90 code with Finite Volume Method 1D - EM Wave cutoff from critical density plasma - Electron Cyclotron Mode Tunneling - Cold Plasma Langmuir Oscillations

用有限差分法求解矩形金属波导的截止波长和场分布。 -calculating the cutoff wavelength of a rectangular waveguide with FDM

设计实现采样频率24kHz、截止频率6kHz的37阶FIR低通滤波器。设计滤波器，将提供信号中的9kHz信号滤除，余下3kHz信号。-Design and Implementation of the sampling frequency 24kHz, 6kHz cutoff frequency of 37-order FIR low-pass filter. Filter is designed to provide a signal of the signal filter 9kHz rema

设计一个Chebyshev II型低通滤波器，指标如下： 通带边界频率：，通带最大衰减：。 阻带截止频率：，阻带最小衰减：。-Design a II Chebyshev type low pass filter, the index is as follows: Pass band boundary frequency: 0.2pi, pass band attenuation: 1db. Stop band cutoff frequency: 0.4pi, minimum at