dm_demo

Unscented Klaman filter for estimation of frequency of simple sinusoid

这是一个关于垂直腔半导体光放大器（VCSOA，微腔光放大器的一种）中的双稳态曲线计算程序，用Matlab语言写成，可执行。程序是根据VCSOA中的速率方程（Rate Equation）编写的。从曲线上可以看出随着输入功率Pin的变化VCSOA的输出功率Pout的双稳态曲线，是进一步研究该问题的基本素材之一。(This is a computation program for calculating the bistability activity of the vertical cavity semiconductor optical amplifier, which is based on the rate equation in VCSOA. This code is a basis for further investigating other activities in VCSOA related to bistability. )

对机载SAR系统点目标进行模拟仿真，利用RD算法分别对零斜视角、小斜视角、大斜视角进行成像。(This experiment is for point target simulation of SAR system, and we use RD algorithm to achieve point target imaging, respectively, zero oblique angle, a small oblique angle,and a large squint angle imaging.)

输入：样本序列 输出：一个具有最佳拟合的Nakagami(return fitted best Nakagami)

转子系统碰摩，有轴承约束的转子系统碰撞摩擦matlab程序(Rotor system rub-impact, with bearing constraint rotor system collision friction matlab program)

基于MATLAB的PID程序，该程序实现PID参数的优化调整(MATLAB based on the PID process, which realize the optimal adjustment of PID parameters)

说明：  最速下降法是迭代法的一种,可以用于求解最小二乘问题(线性和非线性都可以)。在求解机器学习算法的模型参数，即无约束优化问题时，梯度下降（Gradient Descent）是最常采用的方法之一，另一种常用的方法是最小二乘法。在求解损失函数的最小值时，可以通过梯度下降法来一步步的迭代求解，得到最小化的损失函数和模型参数值。反过来，如果我们需要求解损失函数的最大值，这时就需要用梯度上升法来迭代了。在机器学习中，基于基本的梯度下降法发展了两种梯度下降方法，分别为随机梯度下降法和批量梯度下降法。(The steepest descent method is a kind of iterative method, which can be used to solve the least squares problem (both linear and nonlinear). In solving the model parameters of machine learning algorithm, that is, unconstrained optimization, gradient descent is one of the most commonly used methods, and the other is the least square method. When solving the minimum value of loss function, the gradient descent method can be used step by step to get the minimum value of loss function and model parameters. Conversely, if we need to solve the maximum value of the loss function, then we need to use the gradient rise method to iterate. In machine learning, two kinds of ladders are developed based on the basic gradient descent method)

应用MATLAB实现连续信号的采样与重构仿真(Application of MATLAB to achieve continuous signal sampling and reconstruction of simulation)

MATLAB平台下使用HOUGH变换检测圆的算法(Use HOUGH transform circle detection algorithm)

this is file mathlab for MPPT