In the environment of MATLAB R2018a, GRNN is established for the prediction over the time series of oil future prices. First, we need to figure out the optimal smoothing factor of the GRNN model. Based on the foregoing method, we select the GRNN network model of which the smoothing factor...
By dint of MATLAB toolbox, GA also was integrate with BP neural network to form the GABP algorithm. Compared the back analysis results of the same elasto-plastic model parameters in BAOZHEN long and large railway tunnel by the two different algorithms, it can be concluded that the improved ...
numerical model parameters within their search interval. In virtue of MATLAB toolbox,GA also is integrated into BP neural network to form the GA-BP algorithm. By comparing the identification results of three-dimensional elastoplastic model parameters in tunnel engineering by the two different algorithms...
雷英杰.MATLAB 遗传算 法工 具箱及应 用 [ M] .陕 西:西安电子科技大学出版社 ,2005 :22 —28. [ LEI Y J .The Toolbox and i ts A ppl ication of Matl ab Ba sed on GA [ M ] . Shanxi : Xi ’an Electric Science University Press ,2005 :2 2 —28 .( in Chinese) j ...
在MATLAB2010b的环境下, 实现改进小波-GA-SVR模型对股票样本的回归和预测, 并使用相关系数(R2)和均方误差(MSE)作为回归模型的评价依据, 与单一的SVR模型、GA-SVR模型、BP神经网络模型和标准小波-GA-SVR模型进行对比分析. 3.2 数据的归一化及小波去噪细节 为了消除指标之间的量纲影响, 对数据进行归一化处理, 使得...
(GA) is combined with it to form the improved GA-SVR algorithm.After the optimal nonlinear mapping between the numerical model parameters and displacement is constructed,GA is used to identify the numerical model parameters within their search interval.In virtue of MATLAB toolbox,GA also is ...
本发明公开一种基于GASVR的数控机床几何误差建模方法,应用激光干涉仪对不同速度,不同空间坐标位置下的数控机床几何误差进行测量;在SVR模型中选择合适的核函数与GA算法优化SVR的关键参数;在MATLAB中,根据GASVR回归模型原理,建立数控机床三种几何误差精确预测模型.本方法通过GASVR建模简化了建模难度.提高了误差预测建模精度,...
果进行分析 。在matlab2008环境下 ,编写遗传算法 参数优化程 序, 寻得最优参数对 (c ’,P’, ’) = (14.9251,0.0265,0.0034) ,使用林智仁开 发的libsvm支持向量机工具箱,可得到适应度曲线 ( 如图3所 示) 以及训练样本和测试样本回归预测 图( 如图4所示 ) ...