SCI一区级 | Matlab实现BES-CNN-GRU-Mutilhead-Attention秃鹰算法优化卷积门控循环单元融合多头注意力机制多变量时间序列预测
目录
预测效果
基本介绍
1.Matlab实现BES-CNN-GRU-Mutilhead-Attention秃鹰算法优化卷积门控循环单元融合多头注意力机制多变量时间序列预测,要求Matlab2023版以上;
2.输入多个特征,输出单个变量,考虑历史特征的影响,多变量时间序列预测;
3.data为数据集,main.m为主程序,运行即可,所有文件放在一个文件夹;
4.命令窗口输出R2、MSE、MAE、MAPE和RMSE多指标评价;
5.算法优化学习率,神经元个数,注意力机制的键值, 卷积核个数。
程序设计
- 完整源码和数据获取方式私信博主回复Matlab实现BES-CNN-GRU-Mutilhead-Attention多变量时间序列预测。
clike
layers0 = [ ...
% 输入特征
sequenceInputLayer([numFeatures,1,1],'name','input') %输入层设置
sequenceFoldingLayer('name','fold') %使用序列折叠层对图像序列的时间步长进行独立的卷积运算。
% CNN特征提取
convolution2dLayer([3,1],16,'Stride',[1,1],'name','conv1') %添加卷积层,64,1表示过滤器大小,10过滤器个数,Stride是垂直和水平过滤的步长
batchNormalizationLayer('name','batchnorm1') % BN层,用于加速训练过程,防止梯度消失或梯度爆炸
reluLayer('name','relu1') % ReLU激活层,用于保持输出的非线性性及修正梯度的问题
% 池化层
maxPooling2dLayer([2,1],'Stride',2,'Padding','same','name','maxpool') % 第一层池化层,包括3x3大小的池化窗口,步长为1,same填充方式
% 展开层
sequenceUnfoldingLayer('name','unfold') %独立的卷积运行结束后,要将序列恢复
%平滑层
flattenLayer('name','flatten')
selfAttentionLayer(2,2) %创建2个头,2个键和查询通道的自注意力层
dropoutLayer(0.1,'name','dropout_1') % Dropout层,以概率为0.2丢弃输入
fullyConnectedLayer(1,'name','fullconnect') % 全连接层设置(影响输出维度)(cell层出来的输出层) %
regressionLayer('Name','output') ];
lgraph0 = layerGraph(layers0);
lgraph0 = connectLayers(lgraph0,'fold/miniBatchSize','unfold/miniBatchSize');
pNum = round( pop * P_percent ); % The population size of the producers
for t=1:MaxIt
%% 1- select_space
[pop BestSol s1(t)]=select_space(fobj,pop,nPop,BestSol,low,high,dim);
%% 2- search in space
[pop BestSol s2(t)]=search_space(fobj,pop,BestSol,nPop,low,high);
%% 3- swoop
[pop BestSol s3(t)]=swoop(fobj,pop,BestSol,nPop,low,high);
Convergence_curve(t)=BestSol.cost;
disp(num2str([t BestSol.cost]))
ed=cputime;
timep=ed-st;
end
function [pop BestSol s1]=select_space(fobj,pop,npop,BestSol,low,high,dim)
Mean=mean(pop.pos);
% Empty Structure for Individuals
empty_individual.pos = [];
empty_individual.cost = [];
lm= 2;
s1=0;
for i=1:npop
newsol=empty_individual;
newsol.pos= BestSol.pos+ lm*rand(1,dim).*(Mean - pop.pos(i,:));
newsol.pos = max(newsol.pos, low);
newsol.pos = min(newsol.pos, high);
newsol.cost=fobj(newsol.pos);
if newsol.cost<pop.cost(i)
pop.pos(i,:) = newsol.pos;
pop.cost(i)= newsol.cost;
s1=s1+1;
if pop.cost(i) < BestSol.cost
BestSol.pos= pop.pos(i,:);
BestSol.cost=pop.cost(i);
end
end
end
参考资料
[1] https://blog.csdn.net/kjm13182345320/article/details/128577926?spm=1001.2014.3001.5501
[2] https://blog.csdn.net/kjm13182345320/article/details/128573597?spm=1001.2014.3001.5501