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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)

说明：  用matlab写的一个关于最大期望算法EM实现(Using matlab to write an EM algorithm on the greatest hope to achieve)

WGS 转换到Carser WGS 转换到Carser(ConvertWGStoCarser ConvertWGStoCarser ConvertWGStoCarser)

This is simlink model for single phase full bridge inverter

Single input single output matlab simulation code.

HI MATLAB DECODE FILE

hoffman channel coding project

cholesky算法（正定对称矩阵的LL 分解，完整程序）(cholesky)

说明：  主成分分析法主要算法程序, 里面有详细解释.(Principal component analysis procedure main algorithm, which has a detailed explanation.)

Returns Number of ports on the interface. Zero to disable.