import pandas as pd import numpy as np import matplotlib.pyplot as plt from keras.models import Model, Input from keras.layers import Conv1D, BatchNormalization, Activation, Add, Flatten, Dense from keras.optimizers import Adam # 读取CSV文件 data = pd.read_csv("3c_left_1-6.csv", header=None) # 将数据转换为Numpy数组 data = data.values # 定义输入形状 input_shape = (data.shape[1], 1) # 定义深度残差网络 def residual_network(inputs): # 第一层卷积层 x = Conv1D(32, 3, padding="same")(inputs) x = BatchNormalization()(x) x = Activation("relu")(x) # 残差块 for i in range(5): y = Conv1D(32, 3, padding="same")(x) y = BatchNormalization()(y) y = Activation("relu")(y) y = Conv1D(32, 3, padding="same")(y) y = BatchNormalization()(y) y = Add()([x, y]) x = Activation("relu")(y) # 全局池化层和全连接层 x = Flatten()(x) x = Dense(128, activation="relu")(x) x = Dense(3, activation="linear")(x) outputs = x return outputs # 构建模型 inputs = Input(shape=input_shape) outputs = residual_network(inputs) model = Model(inputs=inputs, outputs=outputs) # 编译模型 model.compile(loss="mean_squared_error", optimizer=Adam()) # 训练模型 model.fit(data[..., np.newaxis], data, epochs=100) # 预测数据 predicted_data = model.predict(data[..., np.newaxis]) predicted_data = np.squeeze(predicted_data) # 可视化去噪前后的数据 fig, axs = plt.subplots(3, 1, figsize=(12, 8)) for i in range(3): axs[i].plot(data[:, i], label="Original Signal") axs[i].plot(predicted_data[:, i], label="Denoised Signal") axs[i].legend() plt.savefig("denoised_signal.png") # 将去噪后的数据保存为CSV文件 df = pd.DataFrame(predicted_data, columns=["x", "y", "z"]) df.to_csv("denoised_data.csv", index=False)
时间: 2023-06-14 14:05:20 浏览: 55
这段代码是使用深度残差网络对3轴加速度传感器数据进行去噪处理,使用的是Keras框架。具体实现过程如下:
1. 读取CSV文件,将数据转换为Numpy数组。
2. 定义输入形状(input_shape),这里为(数据样本数, 每个样本的特征数, 1)。
3. 定义深度残差网络(residual_network),包括一个卷积层(Conv1D),五个残差块(Residual Block),一个全局池化层(Flatten)和两个全连接层(Dense)。每个残差块包含两个卷积层(Conv1D)、两个批量归一化层(BatchNormalization)、一个ReLU激活函数(Activation)和一个Add层(Add)。
4. 构建模型,使用Keras的Model类将输入和输出连接起来。
5. 编译模型,定义损失函数(loss)和优化器(optimizer)。
6. 训练模型,使用fit函数对模型进行训练,其中x为输入数据,y为输出数据,epochs为训练轮数。
7. 预测数据,使用predict函数对输入数据进行预测,得到去噪后的数据(predicted_data)。
8. 可视化去噪前后的数据,使用matplotlib库绘制原始数据和去噪后的数据的图像,并保存为PNG文件。
9. 将去噪后的数据保存为CSV文件,使用pandas库将Numpy数组转换为DataFrame,再将DataFrame保存为CSV文件。
需要注意的是,这里使用的是均方误差作为损失函数,可能并不是最优选择,具体的选择可以根据实际情况进行调整。
相关问题
import pandas as pd import numpy as np import matplotlib.pyplot as plt from keras.models import Model, Input from keras.layers import Conv1D, BatchNormalization, Activation, Add, Flatten, Dense from keras.optimizers import Adam # 读取CSV文件 data = pd.read_csv("3c_left_1-6.csv", header=None) # 将数据转换为Numpy数组 data = data.values # 定义输入形状 input_shape = (data.shape[1], 1) # 定义深度残差网络 def residual_network(inputs): # 第一层卷积层 x = Conv1D(32, 3, padding="same")(inputs) x = BatchNormalization()(x) x = Activation("relu")(x) # 残差块 for i in range(5): y = Conv1D(32, 3, padding="same")(x) y = BatchNormalization()(y) y = Activation("relu")(y) y = Conv1D(32, 3, padding="same")(y) y = BatchNormalization()(y) y = Add()([x, y]) x = Activation("relu")(y) # 全局池化层和全连接层 x = Flatten()(x) x = Dense(128, activation="relu")(x) x = Dense(data.shape[1], activation="linear")(x) outputs = Add()([x, inputs]) return outputs # 构建模型 inputs = Input(shape=input_shape) outputs = residual_network(inputs) model = Model(inputs=inputs, outputs=outputs) # 编译模型 model.compile(loss="mean_squared_error", optimizer=Adam()) # 训练模型 model.fit(data[..., np.newaxis], data[..., np.newaxis], epochs=100) # 预测数据 predicted_data = model.predict(data[..., np.newaxis]) # 可视化去噪前后的数据 fig, axs = plt.subplots(3, 1, figsize=(12, 8)) for i in range(3): axs[i].plot(data[:, i], label="Original Signal") axs[i].plot(predicted_data[:, i], label="Denoised Signal") axs[i].legend() plt.savefig("denoised_signal.png") # 将去噪后的数据保存为CSV文件 df = pd.DataFrame(predicted_data, columns=["x", "y", "z"]) df.to_csv("denoised_data.csv", index=False)报错为
您好,这段代码存在一些缩进错误,需要将import语句和定义residual_network函数的代码块缩进一下,如下所示:
```python
import pandas as pd
import numpy as np
import matplotlib.pyplot as plt
from keras.models import Model, Input
from keras.layers import Conv1D, BatchNormalization, Activation, Add, Flatten, Dense
from keras.optimizers import Adam
# 读取CSV文件
data = pd.read_csv("3c_left_1-6.csv", header=None)
# 将数据转换为Numpy数组
data = data.values
# 定义输入形状
input_shape = (data.shape[1], 1)
# 定义深度残差网络
def residual_network(inputs):
# 第一层卷积层
x = Conv1D(32, 3, padding="same")(inputs)
x = BatchNormalization()(x)
x = Activation("relu")(x)
# 残差块
for i in range(5):
y = Conv1D(32, 3, padding="same")(x)
y = BatchNormalization()(y)
y = Activation("relu")(y)
y = Conv1D(32, 3, padding="same")(y)
y = BatchNormalization()(y)
y = Add()([x, y])
x = Activation("relu")(y)
# 全局池化层和全连接层
x = Flatten()(x)
x = Dense(128, activation="relu")(x)
x = Dense(data.shape[1], activation="linear")(x)
outputs = Add()([x, inputs])
return outputs
# 构建模型
inputs = Input(shape=input_shape)
outputs = residual_network(inputs)
model = Model(inputs=inputs, outputs=outputs)
# 编译模型
model.compile(loss="mean_squared_error", optimizer=Adam())
# 训练模型
model.fit(data[..., np.newaxis], data[..., np.newaxis], epochs=100)
# 预测数据
predicted_data = model.predict(data[..., np.newaxis])
# 可视化去噪前后的数据
fig, axs = plt.subplots(3, 1, figsize=(12, 8))
for i in range(3):
axs[i].plot(data[:, i], label="Original Signal")
axs[i].plot(predicted_data[:, i], label="Denoised Signal")
axs[i].legend()
plt.savefig("denoised_signal.png")
# 将去噪后的数据保存为CSV文件
df = pd.DataFrame(predicted_data, columns=["x", "y", "z"])
df.to_csv("denoised_data.csv", index=False)
```
另外,如果您在运行代码时仍然遇到错误,请提供完整的错误信息,以便更好地帮助您解决问题。
import matplotlib.pyplot as plt import pandas as pd from keras.models import Sequential from keras import layers from keras import regularizers import os import keras import keras.backend as K import numpy as np from keras.callbacks import LearningRateScheduler data = "data.csv" df = pd.read_csv(data, header=0, index_col=0) df1 = df.drop(["y"], axis=1) lbls = df["y"].values - 1 wave = np.zeros((11500, 178)) z = 0 for index, row in df1.iterrows(): wave[z, :] = row z+=1 mean = wave.mean(axis=0) wave -= mean std = wave.std(axis=0) wave /= std def one_hot(y): lbl = np.zeros(5) lbl[y] = 1 return lbl target = [] for value in lbls: target.append(one_hot(value)) target = np.array(target) wave = np.expand_dims(wave, axis=-1) model = Sequential() model.add(layers.Conv1D(64, 15, strides=2, input_shape=(178, 1), use_bias=False)) model.add(layers.ReLU()) model.add(layers.Conv1D(64, 3)) model.add(layers.Conv1D(64, 3, strides=2)) model.add(layers.BatchNormalization()) model.add(layers.Dropout(0.5)) model.add(layers.Conv1D(64, 3)) model.add(layers.Conv1D(64, 3, strides=2)) model.add(layers.BatchNormalization()) model.add(layers.LSTM(64, dropout=0.5, return_sequences=True)) model.add(layers.LSTM(64, dropout=0.5, return_sequences=True)) model.add(layers.LSTM(32)) model.add(layers.Dropout(0.5)) model.add(layers.Dense(5, activation="softmax")) model.summary() save_path = './keras_model3.h5' if os.path.isfile(save_path): model.load_weights(save_path) print('reloaded.') adam = keras.optimizers.adam() model.compile(optimizer=adam, loss="categorical_crossentropy", metrics=["acc"]) # 计算学习率 def lr_scheduler(epoch): # 每隔100个epoch,学习率减小为原来的0.5 if epoch % 100 == 0 and epoch != 0: lr = K.get_value(model.optimizer.lr) K.set_value(model.optimizer.lr, lr * 0.5) print("lr changed to {}".format(lr * 0.5)) return K.get_value(model.optimizer.lr) lrate = LearningRateScheduler(lr_scheduler) history = model.fit(wave, target, epochs=400, batch_size=128, validation_split=0.2, verbose=2, callbacks=[lrate]) model.save_weights(save_path) print(history.history.keys()) # summarize history for accuracy plt.plot(history.history['acc']) plt.plot(history.history['val_acc']) plt.title('model accuracy') plt.ylabel('accuracy') plt.xlabel('epoch') plt.legend(['train', 'test'], loc='upper left') plt.show() # summarize history for loss 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 left') plt.show()
这段代码是用来训练一个深度学习模型的代码,使用了Keras和Tensorflow进行模型的搭建、训练和保存。该模型包含了卷积层、批量归一化层、Dropout层、LSTM层和全连接层,并且最终使用softmax激活函数得到预测的类别。通过对数据进行处理,将输入数据按照一定的规范进行规范化,将标签转换成了一个one-hot编码的形式。最后,该代码通过在数据上进行训练,得到一个可以用来做预测的深度学习模型。