80 lines
2.3 KiB
Python
80 lines
2.3 KiB
Python
from data_load import data_format
|
|
import tensorflow as tf
|
|
import numpy as np
|
|
from keras.layers import Dropout
|
|
from keras import regularizers
|
|
from keras.callbacks import TensorBoard, LearningRateScheduler
|
|
import keras
|
|
|
|
|
|
def model_train(X_train, X_test, Y_train, Y_test):
|
|
"""_summary_
|
|
Args:
|
|
X_train (np.array): _description_
|
|
X_test (np.array): _description_
|
|
Y_train (np.array): _description_
|
|
Y_test (np.array): _description_
|
|
|
|
"""
|
|
# 数据随机化
|
|
np.random.seed(7)
|
|
np.random.shuffle(X_train)
|
|
np.random.seed(7)
|
|
np.random.shuffle(Y_train)
|
|
tf.random.set_seed(7)
|
|
|
|
# 构建模型
|
|
model = tf.keras.models.Sequential([
|
|
tf.keras.layers.LSTM(100, return_sequences=True), # 第一层
|
|
Dropout(0.2),
|
|
tf.keras.layers.LSTM(80), # 第二层
|
|
Dropout(0.2),
|
|
tf.keras.layers.Dense(
|
|
1, kernel_regularizer=regularizers.l2(0.01))
|
|
])
|
|
|
|
# 损失函数
|
|
loss_fn = tf.keras.losses.MeanSquaredError()
|
|
|
|
# 编译模型
|
|
model.compile(
|
|
optimizer='SGD',
|
|
loss=loss_fn,
|
|
metrics=[tf.keras.metrics.MeanAbsolutePercentageError()]
|
|
)
|
|
|
|
# 定义学习率指数递减的函数
|
|
def lr_schedule(epoch):
|
|
initial_learning_rate = 0.01
|
|
decay_rate = 0.1
|
|
decay_steps = 2000
|
|
new_learning_rate = initial_learning_rate * \
|
|
decay_rate ** (epoch / decay_steps)
|
|
return new_learning_rate
|
|
|
|
# 定义学习率调度器
|
|
lr_scheduler = LearningRateScheduler(lr_schedule)
|
|
|
|
# TensorBoard 回调
|
|
log_dir = "logs/fit"
|
|
tensorboard_callback = TensorBoard(log_dir=log_dir, histogram_freq=1)
|
|
|
|
# 训练模型,添加 TensorBoard 回调
|
|
model.fit(X_train, Y_train, epochs=6000,
|
|
callbacks=[tensorboard_callback, lr_scheduler], batch_size=256)
|
|
|
|
loss, mape = model.evaluate(X_test, Y_test)
|
|
print("Test loss:", loss,)
|
|
print("test mape:", mape)
|
|
|
|
# 保存模型
|
|
keras.models.save_model(model, 'model')
|
|
|
|
|
|
if __name__ == "__main__":
|
|
X_train, X_test, Y_train, Y_test = data_format(
|
|
'data/archive/PowerQualityDistributionDataset1.csv', md = 1)
|
|
X_train = X_train.reshape(X_train.shape[0], X_train.shape[1], 1)
|
|
X_test = X_test.reshape(X_test.shape[0], X_test.shape[1], 1)
|
|
model_train(X_train, X_test, Y_train, Y_test)
|