我有一个包含10个变量共10000组的csv格式高炉故障分类数据,请用胶囊网络模型进行故障分类,并给出代码以及每行代码解释
时间: 2024-03-13 08:43:09 浏览: 16
好的,我来回答你的问题。首先,胶囊网络(Capsule Network)是一种新型的深度学习网络模型,是由Hinton教授等人在2017年提出的,主要用于图像分类、目标识别等任务。它的主要特点是可以有效地捕捉空间层级特征,对于处理具有变形、旋转等变换的数据具有很好的鲁棒性。
针对你的问题,下面是使用胶囊网络进行高炉故障分类的代码及解释:
```python
import pandas as pd
import numpy as np
import tensorflow as tf
from keras import layers
from keras import models
from keras import backend as K
# 读取数据
data = pd.read_csv("data.csv")
# 数据预处理
X = data.iloc[:, 0:10].values
Y = data.iloc[:, 10].values
Y = np.array(pd.get_dummies(Y))
# 构建胶囊网络模型
class Capsule(layers.Layer):
def __init__(self, num_capsule, dim_capsule, routings=3, **kwargs):
super(Capsule, self).__init__(**kwargs)
self.num_capsule = num_capsule
self.dim_capsule = dim_capsule
self.routings = routings
self.kernel_initializer = tf.keras.initializers.get("glorot_uniform")
self.bias_initializer = tf.keras.initializers.get("zeros")
def build(self, input_shape):
assert len(input_shape) >= 3
self.input_num_capsule = input_shape[1]
self.input_dim_capsule = input_shape[2]
self.W = self.add_weight(
shape=[self.input_num_capsule, self.num_capsule, self.input_dim_capsule, self.dim_capsule],
initializer=self.kernel_initializer,
name="W",
)
self.bias = self.add_weight(
shape=[1, self.input_num_capsule, self.num_capsule, 1, 1], initializer=self.bias_initializer, name="bias"
)
self.built = True
def call(self, inputs, training=None):
inputs_expand = tf.expand_dims(tf.expand_dims(inputs, 2), 2)
inputs_tiled = tf.tile(inputs_expand, [1, 1, self.num_capsule, 1, 1])
inputs_hat = tf.scan(
lambda ac, x: K.batch_dot(x, self.W, [3, 2]), elems=inputs_tiled, initializer=K.zeros([inputs.shape[0], self.input_num_capsule, self.dim_capsule, 1])
)
for i in range(self.routings):
c = tf.nn.softmax(self.bias, axis=2)
outputs = squash(K.sum(c * inputs_hat, axis=1, keepdims=True))
if i != self.routings - 1:
self.bias += K.sum(inputs_hat * outputs, axis=-1, keepdims=True)
return tf.squeeze(outputs, axis=1)
def compute_output_shape(self, input_shape):
return tuple([None, self.num_capsule, self.dim_capsule])
def get_config(self):
config = {
"num_capsule": self.num_capsule,
"dim_capsule": self.dim_capsule,
"routings": self.routings,
}
base_config = super(Capsule, self).get_config()
return dict(list(base_config.items()) + list(config.items()))
def squash(vectors, axis=-1):
squared_norm = K.sum(K.square(vectors), axis, keepdims=True)
scale = squared_norm / (1 + squared_norm) / K.sqrt(squared_norm + K.epsilon())
return scale * vectors
input_layer = layers.Input(shape=(10,))
x = layers.Reshape((10, 1))(input_layer)
x = layers.Conv1D(filters=64, kernel_size=5, padding="valid", activation="relu", strides=1)(x)
x = layers.BatchNormalization()(x)
x = layers.Conv1D(filters=128, kernel_size=5, padding="valid", activation="relu", strides=1)(x)
x = layers.BatchNormalization()(x)
x = layers.Conv1D(filters=256, kernel_size=5, padding="valid", activation="relu", strides=1)(x)
x = layers.BatchNormalization()(x)
x = layers.Conv1D(filters=512, kernel_size=5, padding="valid", activation="relu", strides=1)(x)
x = layers.BatchNormalization()(x)
x = Capsule(num_capsule=10, dim_capsule=16, routings=3)(x)
output_layer = layers.Dense(2, activation="softmax")(x)
model = models.Model(inputs=input_layer, outputs=output_layer)
model.compile(
optimizer=tf.keras.optimizers.Adam(lr=0.001),
loss="categorical_crossentropy",
metrics=["accuracy"],
)
model.fit(X, Y, epochs=100, batch_size=32, validation_split=0.2)
```
代码解释:
1. 导入必要的库:pandas、numpy、tensorflow和Keras。
2. 读取数据:使用pandas库的read_csv方法来读取csv格式的高炉故障分类数据。
3. 数据预处理:将数据分为输入X和输出Y,并对Y进行one-hot编码。这里使用了pandas库中的get_dummies方法来实现。
4. 构建胶囊网络模型:首先定义了Capsule类,用来实现胶囊网络的胶囊层。在胶囊层中,使用了动态路由算法来实现胶囊之间的交互和信息传递。具体实现过程可以参考Hinton教授的论文《Dynamic Routing Between Capsules》。
5. 构建模型:使用Keras的函数式API来构建模型,输入层为10个变量,经过一系列卷积层和胶囊层之后,输出层为2个类别,使用softmax作为激活函数。优化器选择了Adam,损失函数选择了交叉熵,评估指标选择了准确率。
6. 训练模型:使用fit方法来训练模型,共训练100个epoch,batch_size为32,验证集占总数据的20%。