基于PSO粒子群优化的CNN-LSTM的时间序列回归预测matlab仿真

1.算法运行效果图预览

2.算法运行软件版本

matlab2022a

3.部分核心程序

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for i=1:Iter
    i
    for j=1:Npeop
        rng(i+j)
        if func_obj(x1(j,:))<pbest1(j)
           p1(j,:)   = x1(j,:);%变量
           pbest1(j) = func_obj(x1(j,:));
        end
        if pbest1(j)<gbest1
           g1     = p1(j,:);%变量
           gbest1 = pbest1(j);
        end
         
        v1(j,:) = 0.8*v1(j,:)+c1*rand*(p1(j,:)-x1(j,:))+c2*rand*(g1-x1(j,:));
        x1(j,:) = x1(j,:)+v1(j,:); 
          
        for k=1:dims
            if x1(j,k) >= tmps(2,k)
               x1(j,k) = tmps(2,k);
            end
            if x1(j,k) <= tmps(1,k)
               x1(j,k) = tmps(1,k);
            end
        end
  
        for k=1:dims
            if v1(j,k) >= tmps(2,k)/2
               v1(j,k) =  tmps(2,k)/2;
            end
            if v1(j,k) <= tmps(1,k)/2
               v1(j,k) =  tmps(1,k)/2;
            end
        end
  
    end
    gb1(i)=gbest1 
end
  
figure;
plot(gb1,'-bs',...
    'LineWidth',1,...
    'MarkerSize',6,...
    'MarkerEdgeColor','k',...
    'MarkerFaceColor',[0.9,0.0,0.0]);
  
xlabel('优化迭代次数');
ylabel('适应度值');
.....................................................
figure;
plot(IT(1:1:end),Accuracy(1:1:end));
xlabel('epoch');
ylabel('RMSE');
%数据预测
Dpre1 = predict(Net, Nsp_train2);
Dpre2 = predict(Net, Nsp_test2);
  
%归一化还原
T_sim1=Dpre1*Vmax2;
T_sim2=Dpre2*Vmax2;
  
  
%网络结构
analyzeNetwork(Net)
  
  
figure
subplot(211);
plot(1: Num1, Tat_train,'-bs',...
    'LineWidth',1,...
    'MarkerSize',6,...
    'MarkerEdgeColor','k',...
    'MarkerFaceColor',[0.9,0.0,0.0]);
hold on
plot(1: Num1, T_sim1,'g',...
    'LineWidth',2,...
    'MarkerSize',6,...
    'MarkerEdgeColor','k',...
    'MarkerFaceColor',[0.9,0.9,0.0]);
  
legend('真实值', '预测值')
xlabel('预测样本')
ylabel('预测结果')
grid on
  
subplot(212);
plot(1: Num1, Tat_train-T_sim1','-bs',...
    'LineWidth',1,...
    'MarkerSize',6,...
    'MarkerEdgeColor','k',...
    'MarkerFaceColor',[0.9,0.0,0.0]);
  
xlabel('预测样本')
ylabel('预测误差')
grid on
ylim([-50,50]);
figure
subplot(211);
plot(1: Num2, Tat_test,'-bs',...
    'LineWidth',1,...
    'MarkerSize',6,...
    'MarkerEdgeColor','k',...
    'MarkerFaceColor',[0.9,0.0,0.0]);
hold on
plot(1: Num2, T_sim2,'g',...
    'LineWidth',2,...
    'MarkerSize',6,...
    'MarkerEdgeColor','k',...
    'MarkerFaceColor',[0.9,0.9,0.0]);
legend('真实值', '预测值')
xlabel('测试样本')
ylabel('测试结果')
grid on
subplot(212);
plot(1: Num2, Tat_test-T_sim2','-bs',...
    'LineWidth',1,...
    'MarkerSize',6,...
    'MarkerEdgeColor','k',...
    'MarkerFaceColor',[0.9,0.0,0.0]);
  
xlabel('预测样本')
ylabel('预测误差')
grid on
ylim([-50,50]);
  
  
save R2.mat Num2 Tat_test T_sim2 gb1 Accuracy

4.算法理论概述

基于粒子群优化（Particle Swarm Optimization, PSO）的卷积神经网络-长短期记忆网络（Convolutional Neural Network - Long Short-Term Memory, CNN-LSTM）模型在时间序列回归预测中，结合了深度学习的强大表达能力和优化算法的高效搜索能力，为复杂时间序列数据的预测提供了一种强有力的解决方案。

4.1 卷积神经网络（CNN）

CNN以其在图像识别领域的卓越表现而闻名，但其在时间序列分析中也显示出了强大的潜力。CNN通过局部连接和权值共享减少参数数量，利用卷积层捕获输入数据的空间特征。