FIR_LP

振动原理与分析计算机大作业 求解非线性振动分析，公式根据书中的 用计算方法的4阶 r-k数值方法(Vibration theory and analysis of computer operations for solving large non-linear vibration analysis of the formula calculation method according to the book of 4-order numerical method rk)

说明：  FDTD迭代算法,可以计算电磁场的光场强度(fdtd simulation)

matlab-fem-analysis-and-application tool box

说明：  针对低信噪比环境下基于能零比的端点检测方法准确率低的问题,提出了一种结合谱减法和短时零熵法的端点检测方法。首先通过功率谱减法对带噪语音进行降噪处理,然后结合短时平均过零率特征与谱熵特征,构造出一种新的语音参数,即短时零熵,最后运用双门限算法进行端点检测。实验结果表明该方法在复杂噪声环境下具有良好的端点检测性能,降低了检测的误判率。(To solve the problem of low accuracy of endpoint detection method based on energy zero ratio in low SNR environment, an endpoint detection method combining spectral subtraction and Short-term zero entropy method is proposed. Firstly, the noise is reduced by power spectrum subtraction, then a new speech parameter, short-time zero entropy, is constructed by combining the short-time average zero crossing rate and spectral entropy. Finally, the double threshold algorithm is used for endpoint detection. The experimental results show that this method has good performance of endpoint detection in complex noise environment, and reduces the rate of detection error.)

MATLAB编程风格指南，帮助你正确使用MATLAB(MATLAB programming style guide to help you correctly use the MATLAB)

to obtain the scattering width of the TM wave

BPSK symbol Error rate performance and calculations

最优化中的一种方法，amijo方法，该方法很典型，(Optimization of a method, amijo method, which is typical,)

说明：  Este código extrae los bigramas de un texto...

由于多径和移动台运动等影响因素，使得移动信道对传输信号在时间、频率和角度上造成了色散，如时间色散、频率色散、角度色散等等，因此多径信道的特性对通信质量有着至关重要的影响，而多径信道的包络统计特性成为我们研究的焦点。根据不同无线环境，接收信号包络一般服从几种典型分布，如瑞利分布、莱斯分布和Nakagami-m分布。(Because multipath and mobile and other sports influence factor, makes mobile channel in transmission in time and frequency signal and Angle caused the dispersion, such as time dispersion, frequency dispersion, Angle dispersion, and so on, thus multipath channel of communication with the characteristics of quality is very important, while the effect of multipath channel (the statistical properties become the focus of our research. According to different wireless environment, receiving signals envelope general subject to several typical distribution, such as Rayleigh distribution, rice distribution and Nakagami-m distribution. )