解释每行代码：import numpy as np def dense(a_in, W, b, g): units = W.shape[1] a_out = np.zeros(units) for j in range(units): w = W[:,j] z = np.dot(w, a_in) + b[j] a_out[j] = g(z) return a_out def sequential(x): W1 = np.array([[1, 2], [3, 4]]) b1 = np.array([-1, -1]) W2 = np.array([[-3, 4], [5, -6]]) b2 = np.array([1, 1]) W3 = np.array([[7, -8], [-9, 10]]) b3 = np.array([2, 2]) a1 = dense(x, W1, b1, np.tanh) a2 = dense(a1, W2, b2, np.tanh) a3 = dense(a2, W3, b3, np.tanh) f_x = a3 return f_x a_in = np.array([-2, 4]) print(sequential(a_in))

import numpy as np import matplotlib.pyplot as plt import math

import numpy as np import matplotlib.pyplot as plt import math # 解决图标题中文乱码问题 import matplotlib as mpl mpl.rcParams['font.sans-serif'] = ['SimHei'] # 指定默认字体 mpl.rcParams['axes....

import numpy as np_FCM代码python_

算法流程随机初始化模糊矩阵U（描述每个点在不同类的隶属度）有了模糊矩阵U通过下面公式计算类中心在这里插入图片描述通过下面公式根据计算出的类中心，更新模糊矩阵U在这里插入图片描述当U的变化不大时结束迭代，...

修改代码：import numpy as np def dense(a_in, W, b, g): units = W.shape[1] a_out = np.zeros(units) for j in range(units): w = W[:, j] z = np.dot(w, a_in) + b[j] a_out[j] = g(z) return a_out def sequential(x): W1 = np.array([[1],[2]]) b1 = np.array([-1]) W2 = np.array([[-3],[4]]) b2 = np.array([1]) W3 = np.array([[5],[-6]]) b3 = np.array([2]) a1 = dense(x, W1, b1, np.tanh) a2 = dense(a1, W2, b2, np.tanh) a3 = dense(a2, W3, b3, np.tanh) f_x = a3 return f_x a_in = np.array([-2, 4]) print(sequential(a_in))

def dense(a_in, W, b, g): units = W.shape[1] a_out = np.zeros(units) for j in range(units): w = W[:, j] z = np.dot(w, a_in) + b[j] a_out[j] = g(z) return a_out def sequential(x): W1 = np....

import numpy as np def dense(a_in, W, b, g): units = W.shape[1] a_out = np.zeros(units) for j in range(units): w = W[:,j] z = np.dot(w, a_in) + b[j] a_out[j] = g(z) return a_out def sequential(x): W1 = np.array([[1, 2], [3, 4]]) b1 = np.array([-1, -1]) W2 = np.array([[-3, 4], [5, -6]]) b2 = np.array([1, 1]) W3 = np.array([[7, -8], [-9, 10]]) b3 = np.array([2, 2]) a1 = dense(x, W1, b1, np.tanh) a2 = dense(a1, W2, b2, np.tanh) a3 = dense(a2, W3, b3, np.tanh) f_x = a3 return f_x a_in = np.array([-2, 4]) print(sequential(a_in))

具体来说，dense函数实现了一个全连接层，其输入为a_in，权重矩阵为W，偏置向量为b，激活函数为g。而sequential函数则将三个全连接层组成了一个三层神经网络，并对输入x进行前向传播，最终输出f_x。在这个例子中...

import numpy as np def dense(a_in, W, b, g): units = W.shape[0] a_out = np.zeros(units) for j in range(units): w = W[j] z = np.dot(w, a_in) + b[j] a_out[j] = g(z) return a_out def sequential(x): W1 = np.array([[1,-3,5], [2,4,-6]]) b1 = np.array([-1,1,2]) W2 = np.array([[-1,2], [3,-4], [-5,6]]) b2 = np.array([2,-2]) W3 = np.array([[-2,1], [3,-4]]) b3 = np.array([1,-2]) W4 = np.array([[3,-1]]) b4 = np.array([-2]) a1 = dense(x, W1, b1, np.tanh) a2 = dense(a1, W2, b2, np.tanh) a3 = dense(a2, W3, b3, np.tanh) a4 = dense(a3, W4, b4, np.tanh) f_x = a4 return f_x a_in = np.array([-2, 4]) print(sequential(a_in))

这段代码是一个神经网络的前向传播过程，包括了四个全连接层（dense）和四个激活函数（np.tanh），将输入向量a_in经过多次线性变换和非线性变换后，得到输出向量f_x。其中，每个全连接层的参数（权重W和偏置b）都是...

将下列代码补充成完整的程序：def dense(a_in,W,b,g): units=W.shape[1] a_out=np.zeros(units) for j in range(units): w=W[:j] z=np.dot(w,a_in)+b[j] a_out[j]=g(z) return a_out def sequential(x): a1=dense(x,W1,b1) a2=dense(a1,W2,b2) a3=dense(a2,W3,b3) a4=dense(a3,W4,b4) f_x=a4 return f_x W=np.array([[1,-3,5], [2,4,-6]]) b=np.array([-1,1,2]) a_in=np.array([-2,4])

import numpy as np def dense(a_in, W, b, g): units = W.shape[1] a_out = np.zeros(units) for j in range(units): w = W[:, j] z = np.dot(w, a_in) + b[j] a_out[j] = g(z) return a_out def ...

import numpy as np import pandas as pd import matplotlib.pyplot as plt from sklearn.preprocessing import MinMaxScaler from keras.models import Sequential from keras.layers import Dense, LSTM from sklearn.metrics import r2_score,median_absolute_error,mean_absolute_error # 读取数据 data = pd.read_csv(r'C:/Users/Ljimmy/Desktop/yyqc/peijian/销量数据rnn.csv') # 取出特征参数 X = data.iloc[:,2:].values # 数据归一化 scaler = MinMaxScaler(feature_range=(0, 1)) X[:, 0] = scaler.fit_transform(X[:, 0].reshape(-1, 1)).flatten() #X = scaler.fit_transform(X) #scaler.fit(X) #X = scaler.transform(X) # 划分训练集和测试集 train_size = int(len(X) * 0.8) test_size = len(X) - train_size train, test = X[0:train_size, :], X[train_size:len(X), :] # 转换为监督学习问题 def create_dataset(dataset, look_back=1): X, Y = [], [] for i in range(len(dataset) - look_back - 1): a = dataset[i:(i + look_back), :] X.append(a) Y.append(dataset[i + look_back, 0]) return np.array(X), np.array(Y) look_back = 12 X_train, Y_train = create_dataset(train, look_back) #Y_train = train[:, 2:] # 取第三列及以后的数据 X_test, Y_test = create_dataset(test, look_back) #Y_test = test[:, 2:] # 取第三列及以后的数据 # 转换为3D张量 X_train = np.reshape(X_train, (X_train.shape[0], X_train.shape[1], 1)) X_test = np.reshape(X_test, (X_test.shape[0], X_test.shape[1], 1)) # 构建LSTM模型 model = Sequential() model.add(LSTM(units=50, return_sequences=True, input_shape=(X_train.shape[1], 1))) model.add(LSTM(units=50)) model.add(Dense(units=1)) model.compile(loss='mean_squared_error', optimizer='adam') model.fit(X_train, Y_train, epochs=5, batch_size=32) #model.fit(X_train, Y_train.reshape(Y_train.shape[0], 1), epochs=10, batch_size=32) # 预测下一个月的销量 last_month_sales = data.tail(12).iloc[:,2:].values #last_month_sales = data.tail(1)[:,2:].values last_month_sales = scaler.transform(last_month_sales) last_month_sales = np.reshape(last_month_sales, (1, look_back, 1)) next_month_sales = model.predict(last_month_sales) next_month_sales = scaler.inverse_transform(next_month_sales) print('Next month sales: %.0f' % next_month_sales[0][0]) # 计算RMSE误差 rmse = np.sqrt(np.mean((next_month_sales - last_month_sales) ** 2)) print('Test RMSE: %.3f' % rmse)IndexError Traceback (most recent call last) Cell In[1], line 36 33 X_test, Y_test = create_dataset(test, look_back) 34 #Y_test = test[:, 2:] # 取第三列及以后的数据 35 # 转换为3D张量 ---> 36 X_train = np.reshape(X_train, (X_train.shape[0], X_train.shape[1], 1)) 37 X_test = np.reshape(X_test, (X_test.shape[0], X_test.shape[1], 1)) 38 # 构建LSTM模型 IndexError: tuple index out of range代码修改

您需要修改以下两行代码： X_train, Y_train = create_dataset(train, look_back) X_test, Y_test = create_dataset(test, look_back) 为： X_train, Y_train = create_dataset(train, look_back) X_...

import numpy as np import pandas as pd import tensorflow as tf from sklearn.preprocessing import MinMaxScaler from sklearn.metrics import r2_score,median_absolute_error,mean_absolute_error # 读取数据 data = pd.read_csv(r'C:/Users/Ljimmy/Desktop/yyqc/peijian/销量数据rnn.csv') dataset = data.values # 数据归一化 scaler = MinMaxScaler(feature_range=(0, 1)) dataset = scaler.fit_transform(dataset) # 分割训练集和测试集 train_size = int(len(dataset) * 0.67) test_size = len(dataset) - train_size train, test = dataset[0:train_size, :], dataset[train_size:len(dataset), :] # 将数据集转化为适合GRU的数据格式 def create_dataset(dataset): X, Y = [], [] for i in range(len(dataset)-1): a = dataset[i:(i+1), :] X.append(a) Y.append(dataset[i+1, :]) return np.array(X), np.array(Y) train_X, train_Y = create_dataset(train) train_Y = train_Y[:, 2:] # 取第三列及以后的数据 test_X, test_Y = create_dataset(test) test_Y = test_Y[:, 2:] # 取第三列及以后的数据 # 定义GRU模型 model = tf.keras.Sequential([ tf.keras.layers.GRU(units=64, return_sequences=True, input_shape=(1, 3)), tf.keras.layers.GRU(units=32), tf.keras.layers.Dense(3)]) # 编译模型 model.compile(optimizer='adam', loss='mse') # 训练模型 model.fit(train_X, train_Y, epochs=100, batch_size=16, verbose=2) # 预测测试集 test_predict = model.predict(test_X) test_predict = scaler.inverse_transform(test_predict) #test_Y = scaler.inverse_transform(test_Y.reshape(-1, 1)) # 计算RMSE误差 rmse = np.sqrt(np.mean((test_predict - test_Y) ** 2)) print('Test RMSE:',rmse) # 预测下一个月的销量 last_month_sales = data.tail(1).values last_month_sales = scaler.transform(last_month_sales) next_month_sales = model.predict(np.array([last_month_sales])) next_month_sales = scaler.inverse_transform(next_month_sales) print('Next month sales:',next_month_sales[0][0])预测结果不够准确，如何增加准确率

import pandas as pd import numpy as np from sklearn.preprocessing import MinMaxScaler from keras.models import Sequential from keras.layers import Dense, LSTM import matplotlib.pyplot as plt # 读取CSV文件 data = pd.read_csv('77.csv', header=None) # 将数据集划分为训练集和测试集 train_size = int(len(data) * 0.7) train_data = data.iloc[:train_size, 1:2].values.reshape(-1,1) test_data = data.iloc[train_size:, 1:2].values.reshape(-1,1) # 对数据进行归一化处理 scaler = MinMaxScaler(feature_range=(0, 1)) train_data = scaler.fit_transform(train_data) test_data = scaler.transform(test_data) # 构建训练集和测试集 def create_dataset(dataset, look_back=1): X, Y = [], [] for i in range(len(dataset) - look_back): X.append(dataset[i:(i+look_back), 0]) Y.append(dataset[i+look_back, 0]) return np.array(X), np.array(Y) look_back = 3 X_train, Y_train = create_dataset(train_data, look_back) X_test, Y_test = create_dataset(test_data, look_back) # 转换为LSTM所需的输入格式 X_train = np.reshape(X_train, (X_train.shape[0], X_train.shape[1], 1)) X_test = np.reshape(X_test, (X_test.shape[0], X_test.shape[1], 1)) # 构建LSTM模型 model = Sequential() model.add(LSTM(units=50, return_sequences=True, input_shape=(look_back, 1))) model.add(LSTM(units=50)) model.add(Dense(units=1)) model.compile(optimizer='adam', loss='mean_squared_error') model.fit(X_train, Y_train, epochs=100, batch_size=32) # 预测测试集并进行反归一化处理 Y_pred = model.predict(X_test) Y_pred = scaler.inverse_transform(Y_pred) Y_test = scaler.inverse_transform(Y_test) # 输出RMSE指标 rmse = np.sqrt(np.mean((Y_pred - Y_test)**2)) print('RMSE:', rmse) # 绘制训练集真实值和预测值图表 train_predict = model.predict(X_train) train_predict = scaler.inverse_transform(train_predict) train_actual = scaler.inverse_transform(Y_train.reshape(-1, 1)) plt.plot(train_actual, label='Actual') plt.plot(train_predict, label='Predicted') plt.title('Training Set') plt.xlabel('Time (h)') plt.ylabel('kWh') plt.legend() plt.show() # 绘制测试集真实值和预测值图表 plt.plot(Y_test, label='Actual') plt.plot(Y_pred, label='Predicted') plt.title('Testing Set') plt.xlabel('Time (h)') plt.ylabel('kWh') plt.legend() plt.show()以上代码运行时报错，错误为ValueError: Expected 2D array, got 1D array instead: array=[-0.04967795 0.09031832 0.07590125]. Reshape your data either using array.reshape(-1, 1) if your data has a single feature or array.reshape(1, -1) if it contains a single sample.如何进行修改

可以将以下代码： X_train, Y_train = create_dataset(train_data, look_back) X_test, Y_test = create_dataset(test_data, look_back) X_train = np.reshape(X_train, (X_train.shape[0], X_train.shape[1],...

import numpy as np from tensorflow import keras # 加载手写数字图像和标签 def load_data(): train_data = np.loadtxt('train_images.csv', delimiter=',') train_labels = np.loadtxt('train_labels.csv', delimiter=',') test_data = np.loadtxt('test_image.csv', delimiter=',') return train_data, train_labels, test_data # 数据预处理 def preprocess_data(train_data, test_data): # 归一化到 [0, 1] 范围 train_data = train_data / 255.0 test_data = test_data / 255.0 # 将数据 reshape 成适合 CNN 的输入形状 (样本数, 高度, 宽度, 通道数) train_data = train_data.reshape(-1, 28, 28, 1) test_data = test_data.reshape(-1, 28, 28, 1) return train_data, test_data # 构建 CNN 模型 def build_model(): model = keras.Sequential([ keras.layers.Conv2D(filters=32, kernel_size=(3, 3), activation='relu', input_shape=(28, 28, 1)), keras.layers.MaxPooling2D(pool_size=(2, 2)), keras.layers.Flatten(), keras.layers.Dense(units=128, activation='relu'), keras.layers.Dense(units=10, activation='softmax') ]) model.compile(optimizer='adam', loss='sparse_categorical_crossentropy', metrics=['accuracy']) return model # 进行数字识别 def recognize_digit(image, model): probabilities = model.predict(image) digit = np.argmax(probabilities) return digit # 主函数 def main(): # 加载数据 train_data, train_labels, test_data = load_data() # 数据预处理 train_data, test_data = preprocess_data(train_data, test_data) # 构建并训练模型 model = build_model() model.fit(train_data, train_labels, epochs=10, batch_size=32) # 进行数字识别 recognized_digit = recognize_digit(test_data, model) print("识别结果：", recognized_digit) if name == 'main': main()

1. 导入必要的库：numpy和tensorflow的keras模块。 2. 定义一个函数load_data()，用于加载手写数字图像和标签数据。 3. 定义一个函数preprocess_data()，用于对数据进行预处理，包括归一化和reshape操作。 4. 定义一...

import numpy as np import matplotlib.pyplot as plt # 生成sin函数数据 x = np.arange(0, 2np.pi, 0.1) y = np.sin(x) # 可视化sin函数 plt.plot(x, y) plt.show() from keras.models import Sequential from keras.layers import Dense, SimpleRNN # 准备数据 dataX, dataY = [], [] for i in range(len(y)-1): dataX.append(y[i:i+1]) dataY.append(y[i+1]) dataX = np.array(dataX) dataY = np.array(dataY) # 划分训练集和测试集 train_size = int(len(dataY) 0.7) test_size = len(dataY) - train_size trainX, testX = np.array(dataX[0:train_size]), np.array(dataX[train_size:len(dataX)]) trainY, testY = np.array(dataY[0:train_size]), np.array(dataY[train_size:len(dataY)]) # 调整输入数据的形状 trainX = np.reshape(trainX, (trainX.shape[0], 1, trainX.shape[1])) testX = np.reshape(testX, (testX.shape[0], 1, testX.shape[1])) # 定义模型结构 model = Sequential() model.add(SimpleRNN(units=10, input_shape=(1, 1))) model.add(Dense(units=1)) # 编译模型 model.compile(optimizer='adam', loss='mse') # 训练模型 history = model.fit(trainX, trainY, epochs=1000, validation_data=(testX, testY)) # 可视化损失函数 plt.plot(history.history['loss']) plt.plot(history.history['val_loss']) plt.title('Model Loss') plt.ylabel('Loss') plt.xlabel('Epoch') plt.legend(['Train', 'Test'], loc='upper right') plt.show()梯度可视化代码

from keras import backend as K def get_gradients(model, inputs, outputs, layer_name): layer_output = model.get_layer(layer_name).output gradients = K.gradients(outputs, layer_output)[0] gradient_...

如果使用这段代码class SmoothFilter(Conv1D): def init(self, filter_size=3, kwargs): super().init( filters=1, kernel_size=filter_size, padding='same', activation='linear', use_bias=False, kwargs ) self.filter_size = filter_size def build(self, input_shape): super().build(input_shape) # 初始化卷积核 kernel = np.ones((self.filter_size, 1, 1)) kernel /= self.filter_size self.set_weights([kernel]) def call(self, inputs): return super().call(inputs)对dense层的一维度输出处理，编码怎么写呢

import numpy as np class SmoothFilter(Conv1D): def __init__(self, filter_size=3, **kwargs): super().__init__( filters=1, kernel_size=filter_size, padding='same', activation='linear', use_bias=...

请修改如下代码： def LSTNetAttention(trainX1, trainX2, trainY, config): # 定义输入层 input_data1 = Input(shape=(trainX1.shape[1], trainX1.shape[2])) input_data2 = Input(shape=(trainX2.shape[1], trainX2.shape[2])) # 定义 LSTM 模型 ... # 使用 GARCH 模型预测波动率 am = arch.arch_model(trainY, vol='GARCH', p=1, q=1) res = am.fit() volatility = res.forecast(horizon=1).variance.iloc[-1].values # 将预测结果和波动率相乘，得到最终的预测结果 pred = model.predict([trainX1, trainX2]) pred = pred * np.sqrt(volatility) # 将预测结果作为一个新的特征加入到模型中 new_feature = pred.reshape(-1, 1) # 重塑成 (batch_size, 1) 的形状 concat = concatenate([lstm_out1, lstm_out2, new_feature]) res = Activation('sigmoid')(concat) # 定义模型并返回 model = Model(inputs=[input_data1, input_data2], outputs=res) return model

import numpy as np import arch def LSTNetAttention(trainX1, trainX2, trainY, config): # 定义输入层 input_data1 = Input(shape=(trainX1.shape[1], trainX1.shape[2])) input_data2 = Input(shape=(trainX...

batch_size = 32 num_classes = 2 epochs = 3 model = Sequential() model.add(Dense(512, activation='relu', input_shape=(25653,))) model.add(Dropout(0.2)) model.add(Dense(512, activation='relu')) model.add(Dropout(0.2)) model.add(Dense(num_classes, activation='softmax')) model.summary() model.compile(loss='categorical_crossentropy', optimizer=RMSprop(), metrics=['accuracy']) #模型训练 #verbose:z history = model.fit(X_train,y_train1, batch_size=batch_size, epochs=epochs, verbose=1, validation_data=(X_test, y_test1)) #模型打分 score = model.evaluate(X_test, y_test, verbose=0) print('Test loss:', score[0]) print('Test accuracy:', score[1]) 编写一个代码对上述模型调参并绘制正确率变化损失图

import numpy as np import matplotlib.pyplot as plt from keras.models import Sequential from keras.layers import Dense, Dropout from keras.optimizers import RMSprop 接下来，我们需要加载数据集并...

# 最佳权重保存路径 BEST_MODEL_PATH = './best_model.h5'

import numpy as np import tensorflow as tf import os # 加载数据集 with open('poems.txt', 'r', encoding='utf-8') as f: data = f.read() # 构建词典 vocab = sorted(set(data)) char2idx = {char: idx for ...

解决AttributeError: module 'tensorflow._api.v2.compat.v1.nn.rnn_cell' has no attribute 'seq2seq'

for t in range(1, targ.shape[1]): # 将编码器的输出和上一时间步的隐藏状态传给解码器 predictions, dec_hidden, _ = decoder(dec_input, dec_hidden, enc_output) loss += loss_function(targ[:, t], ...

请编写代码，利用lstm模型进行时间序列预测，使其仅对序列进行单步预测，随后通过拟合窗口与预测窗口随时间向右滑动，得到关于该序列的完整预测序列，其中加载数据时读取时间序列为r"D:\xiangmu\utilits\name_of_your_excel_file3.xls"文件路径中第5列前3000行的值，将这3000个数据分为训练集与测试集，训练模型后，利用模型预测第3000-3500行的数据，并将预测结果输出到excel文档中

import numpy as np from sklearn.preprocessing import MinMaxScaler import tensorflow as tf from tensorflow.keras.models import Sequential from tensorflow.keras.layers import Dense, LSTM # 读取数据 df ...

Spring Cloud 全面学习案例集，含多种功能示例与教程.zip

1、资源项目源码均已通过严格测试验证，保证能够正常运行； 2、项目问题、技术讨论，可以给博主私信或留言，博主看到后会第一时间与您进行沟通； 3、本项目比较适合计算机领域相关的毕业设计课题、课程作业等使用，尤其对于人工智能、计算机科学与技术等相关专业，更为适合； 4、下载使用后，可先查看README.md文件（如有），本项目仅用作交流学习参考，请切勿用于商业用途。

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