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约束最优化方法--最速下降法(也叫梯度法),是人们用来求多个变量函数极值问题的最早的一种方法。-Constrained optimization methods- steepest descent method (also known as gradient method), is used for multiple variables function Extremum Problems earliest methods.
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用MATLAB求解无约束的问题,主要有最速下降法,牛顿法,共轭梯度法,变尺度法(DFP和BFGS法),非线性最小二乘法。
用MATLAB求解有约束的问题,主要是外惩罚函数和广义乘子法。
以及一些对具体问题的分析,MATLAB的代码在文档里都有。
-Using MATLAB to solve the problem of non-binding, there are the steepest descent method, Newton method, conjugate gradie
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这是一个快速的拟牛顿法程序,非常实用,非常强大-FMINLBFGS is a Memory efficient optimizer for problems such as image registration with large amounts of unknowns, and cpu-expensive gradients.
Supported:
- Quasi Newton Broyden–Fletcher–Goldfarb–Shanno (BFGS).
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计算梯度下降法计算极值,只能找到局部最小点。可以通过调整步长实现全局最小-Calculation of gradient descent method to calculate extreme value, can only find local minimum point. By adjusting the step size can achieve the global minimum
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采用动量梯度下降算法训练BP网络,采用两种训练方法,即 L-M 优化算法(trainlm)和贝叶斯正则化算法(trainbr),用以训练 BP 网络-Gradient descent algorithm using momentum BP network training, using two training methods, namely, LM optimization algorithm (trainlm) and Bayesian regularization algorithm (t
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GDDEMO runs a little demonstration of gradient descent in Matlab. Launch Matlab, and type gddemo to get started.
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matlab动量梯度下降算法
生成一个新的前向神经网络
对BP神经网络进行训练
对BP神经网络进行仿真-Momentum matlab gradient descent algorithm to generate a new feed-forward neural networks trained BP neural network on the BP neural network simulation
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非线性规划中的最陡下降法、BFGS方法和共轭梯度法matlab源程序(3-拟牛顿BFGS方法).m-Non-linear programming in the steepest descent method, BFGS and conjugate gradient method matlab source code (3- Quasi-Newton BFGS method). M
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病态线性方程组的计算题,涉及Gauss消元法、雅可比迭代法、高斯-赛德尔迭代法、最速下降法和共轭梯度法。每一个方法,都编写一个m文件,封装成函数的形式。然后通过总的HilbLineEquSet.m文件来调用执行,画出误差曲线图,得到运行结果。总的Matlab程序流程,如下所示:
病态方程组的计算包括:HilbLineEquSet.m、gauss.m、jacobi.m、gauss_seidel.m、fastest_descend.m和conjugated_grad.m六个文件。
程序执行结
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基于随机梯度下降法的两层sigmoid神经元的BP算法-Stochastic gradient descent method based on two layers of sigmoid neurons in the BP algorithm
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自适应滤波中的最速下降法仿真程序,课程的大作业,可以绘制梯度曲线-Adaptive Filter steepest descent method simulation program, course the big job, you can draw the gradient curve
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最速下降梯度法matlab程序和用拟牛顿法求极小值点-apply a gradient–descent based error minimization approach to minimize the difference between the real deformation and the simulated one given the elasticity parameters
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bp神经网络算法大全,包括基本算法、最优梯度下降算法、自适应算法等-bp neural network algorithm Daquan, including the basic algorithm, the optimal gradient descent algorithm, adaptive algorithm
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共轭梯度法 SUMT内点法 最速下降法 牛顿法 matlab实现-Conjugate gradient method SUMT interior point method the steepest descent method Newton method
matlab
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遗传算法虽然全局搜索能力较强,但是局部搜索能力较弱,一般只能搜索到函数优化问题的次优解,而不是最优解,特别是函数具有多个峰值时,遗传算法易陷入局部极小,不能找到真正的全局最优解。非线性规划因多采用梯度下降方法求解,而具有极强的局部搜索能力。因此,本源代码结合两种算法的优点,一方面采用遗传算法进行全局搜索,另一方面采用非线性规划进行局部搜索,以得到函数优化问题的全局最优解。实验证明,这种方法不仅能解决多峰函数寻优易陷入局部极小的问题,而且具有很高的迭代寻优效率,取得了满意的结果。-Global s
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PSO替代梯度下降训练BP网络,将代码从doc复制出来即可-The PSO alternative gradient descent training of BP network, the code is copied from the doc can
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梯度下降法原理及例题实例及matlab相关资料-Gradient Descent Method
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This is a very simple demo for Vanilla Linear Regression Model (LRM) optimized via Vanilla Gradient Descent Method (GDM) on 1-D and 2-D data set. NOTE that the multicollinearity case is unexpectedly shown. A More advanced version is expected in the c
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使用梯度下降法求无约束问题最优解,包括最速下降法,常数步长下降法等。(Find the best solution to the unconstrained problem, using gradient descent method.)
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机器学习基础之梯度下降算法的matlab源代码(Machine learning basis of the gradient descent algorithm matlab source code.)
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