ldpc_toolkit

基于元胞自动机的气体扩散程序，实时显示左右两侧粒子密度变化。(Based on Cellular Automata gas diffusion process, real-time display left and right sides of the particle density.)

说明：  第6章 无约束一维极值问题 所在章节 函数名 功 能 6.1 minJT 用进退法求解一维函数的极值区间 6.2 minHJ 用黄金分割法求解一维函数的极值 6.3 minFBNQ 用斐波那契法求解一维函数的极值 6.4 minNewton 用牛顿法求解一维函数的极值 6.5 minGX 用割线法求解一维函数的极值 6.6 minPWX 用抛物线法求解一维函数的极值 6.7 minTri 用三次插值法求解一维函数的极值 6.8.1 minGS 用Goldstein法求解一维函数的极值 6.8.2 minWP 用Wolfe-Powell法求解一维函数的极值 (Chapter 6 unconstrained extremum problem one-dimensional sections of the functional 6.1 minJT function method for solving one-dimensional with the advance and retreat of the extreme range of 6.2 minHJ function of the golden section method using one-dimensional function of the extreme 6.3 minFBNQ use Fibonacci method one-dimensional function of the extreme 6.4 minNewton Newton method with one-dimensional function with extreme 6.5 minGX one-dimensional secant method to solve the extreme 6.6 minPWX function method for solving one-dimensional parabolic function of the extreme 6.7 minTri method with cubic interpolation one-dimensional function of the extreme 6.8.1 minGS Goldstein method with one-dimensional function of the extreme 6.8.2 minWP Wolfe-Powell method with a one-dimensional extreme value function)

相位噪声的建模分析，单通道建模和仿真，主要参考文献为《effects of LO phase and amplitude imbalances and phase noise on M-QAM transceiver performance》(Phase noise modeling analysis, single channel, the main references is 《effects of LO phase and amplitude imbalances and phase noise on M-QAM transceiver performance》)

语音唤醒就是在设备待机状态下，用户说出特定的语音指令（唤醒词）使设备进入工作状态或完成某一操作。设备为了实现语音唤醒功能，就需要设备实时监听，也就是实时的录音并分析有没有唤醒词来唤醒设备。评价一个语音唤醒系统的标准有三个：唤醒正确率、误报率、功耗。一般情况下，唤醒正确率越高 ，误报率也越高。好的系统就需要唤醒率高，误报率低，功耗低。(Speech wakeup is when the device is in standby mode, the user speaks a particular voice command (wake up word), so that the device enters the work state or completes an operation. In order to realize the function of speech wakeup, the device needs real-time monitoring, that is, real-time recording and analyzing whether or not wake words are used to wake up the equipment. There are three criteria for evaluating a voice wakeup system: wakeup accuracy, false positive rate, and power consumption. Generally, the higher the correct rate of arousal, the higher the false positive rate. A good system requires high wake-up rate, low false positive rate and low power consumption.)

信号的抽样和恢复，若 是带限信号，带宽为 , 经采样后的频谱 就是将 的频谱 在频率轴上以采样频率 为间隔进行周期延拓。因此，当 时，不会发生频率混叠；而当 < 时将发生频率混叠。(The signal sampling and recovery)

说明：  Lame波的频散曲线，包括相速度和群速度。(The dispersion curve of Lame wave includes phase velocity and group velocity.)

现代通讯技术的迅速发展和普及给人们的生活和工作带来极大便利，然而也使得通讯过程所面临的环境更加复杂，由此增加了通讯时目标语音受到各种类型信号干扰的概率。为了保证通讯质量，需要解决如何抑制这些不同类型的干扰信号，同时尽量降低目标语音信号的失真问题。 　　使用语谱等特征实现语音增强的单麦克风技术容易造成目标语音失真，而波束形成算法利用麦克风阵列得到信号的时域和空域特征，可以获得相对较高的目标语音质量，因而成为语音增强的重要研究方向。

steepest descent/bfgs with polynomial line search

单机无穷大系统的短路电压的仿真和电流的仿真(Single machine infinite bus system short-circuit voltage and current simulation of the simulation)

本文是编程实现图像的直方图均衡化，来达到图像增强。(This is the image histogram programming to help inform the histogram revised)