self.network_parameters = OrderedDict(num_filters_base=config.num_filters_base, activation=config.activation, dropout_ratio=config.dropout_ratio, num_levels=config.num_levels, heatmap_initialization=True, data_format=self.data_format) if config.model == 'unet': self.network = Unet self.clip_gradient_global_norm = 100000.0

时间: 2024-04-09 20:32:10 浏览: 10
这部分代码主要是设置网络的参数和模型选择。 首先，使用`OrderedDict`创建了一个名为`network_parameters`的有序字典，其中包含了一些网络的参数。这些参数包括`num_filters_base`表示基础滤波器数量，`activation`表示激活函数，`dropout_ratio`表示随机失活比率，`num_levels`表示网络的层数，`heatmap_initialization`表示是否对热图进行初始化，`data_format`表示数据格式。 接下来，通过判断`config.model`的值是否为'unet'来选择对应的模型。如果是'unet'，则将`self.network`设置为Unet类的引用。 最后，设置了一个全局梯度裁剪的阈值`clip_gradient_global_norm`为100000.0。这个阈值可以用来控制梯度更新的范围，防止梯度爆炸的问题。 这部分代码主要是设置网络相关的参数和选择模型，具体的网络结构和训练过程需要在其他部分的代码中实现。
相关问题

self.learning_rate = config.learning_rate self.learning_rates = [self.learning_rate, self.learning_rate * 0.5, self.learning_rate * 0.1] self.learning_rate_boundaries = [50000, 75000] self.max_iter = 10000 self.test_iter = 5000 self.disp_iter = 100 self.snapshot_iter = 5000 self.test_initialization = False self.reg_constant = 0.0 self.data_format = 'channels_first' self.network_parameters = OrderedDict(num_filters_base=config.num_filters_base, activation=config.activation, dropout_ratio=config.dropout_ratio, num_levels=config.num_levels, heatmap_initialization=True, data_format=self.data_format)

这段代码是在MainLoop类的初始化方法中设置了一些训练参数和网络参数。 - self.learning_rate：学习率，根据配置文件中的learning_rate来设置。 - self.learning_rates：学习率列表，根据self.learning_rate计算得到，包括三个值，分别为self.learning_rate、self.learning_rate * 0.5、self.learning_rate * 0.1。 - self.learning_rate_boundaries：学习率变化的边界，根据配置文件中的50000和75000来设置。 - self.max_iter：最大迭代次数，设置为10000。 - self.test_iter：测试迭代次数，设置为5000。 - self.disp_iter：显示迭代次数，每迭代100次显示一次。 - self.snapshot_iter：保存模型迭代次数，每迭代5000次保存一次模型。 - self.test_initialization：测试初始化标志，设置为False。 - self.reg_constant：正则化系数，设置为0.0。 - self.data_format：数据格式，设置为'channels_first'。 - self.network_parameters：网络参数，使用有序字典OrderedDict保存。包括num_filters_base、activation、dropout_ratio、num_levels、heatmap_initialization和data_format等参数。 这些参数和网络参数将在训练过程中使用。如果你还有其他问题，请继续提问。

下面给出一段详细代码：class CrnModel: def init(self, feature_num): self.feature_num = feature_num self.input_magnitude = layers.Input(shape=[128, feature_num], name='input_magnitude') model_output = self.structure_model() self.model = tf.keras.Model(inputs=self.input_magnitude, outputs=model_output) self.model.summary() def structure_model(self): layer_input = self.input_magnitude layer_output = layers.Conv1D(filters=64, padding='causal', dilation_rate=1, kernel_size=3, activation='relu')( layer_input) layer_output = layers.Conv1D(filters=64, padding='causal', dilation_rate=2, kernel_size=3, activation='relu')( layer_output) layer_output = layers.Conv1D(filters=64, padding='causal', dilation_rate=4, kernel_size=3, activation='relu')( layer_output) layer_output = layers.Conv1D(filters=64, kernel_size=1, activation='linear')(layer_output) layer_output = layers.Conv1D(filters=257, kernel_size=1, activation='relu')(layer_output) return layer_output。请你给出详细解释和注释

这是一个使用 TensorFlow 实现的 CRN（Causal Residual Network）模型，用于音频信号处理。下面是对代码的详细注释： ``` class CrnModel: def __init__(self, feature_num): self.feature_num = feature_num # 初始化类的特征数 self.input_magnitude = layers.Input(shape=[128, feature_num], name='input_magnitude') # 定义输入层，输入维度为 [128, feature_num] model_output = self.structure_model() # 定义模型输出 self.model = tf.keras.Model(inputs=self.input_magnitude, outputs=model_output) # 定义完整模型 self.model.summary() # 打印模型概述 def structure_model(self): layer_input = self.input_magnitude # 定义输入层 layer_output = layers.Conv1D(filters=64, padding='causal', dilation_rate=1, kernel_size=3, activation='relu')(layer_input) # 第一层卷积层 layer_output = layers.Conv1D(filters=64, padding='causal', dilation_rate=2, kernel_size=3, activation='relu')(layer_output) # 第二层卷积层 layer_output = layers.Conv1D(filters=64, padding='causal', dilation_rate=4, kernel_size=3, activation='relu')(layer_output) # 第三层卷积层 layer_output = layers.Conv1D(filters=64, kernel_size=1, activation='linear')(layer_output) # 用 1x1 卷积层降维 layer_output = layers.Conv1D(filters=257, kernel_size=1, activation='relu')(layer_output) # 最终输出层，输出维度为 257 return layer_output # 返回最终输出层 ``` 该模型使用了四个卷积层，其中 dilation_rate 表示膨胀率，padding 表示填充方式，kernel_size 表示卷积核大小，filters 表示卷积核数量，activation 表示激活函数。模型输入维度为 [128, feature_num]，输出维度为 [128, 257]，其中 257 表示频域的维度。最后使用 Keras 的 Model 类定义完整模型，并打印模型概述。

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class HGMN(nn.Module): def __init__(self, args, n_user, n_item, n_category): super(HGMN, self).__init__() self.n_user = n_user self.n_item = n_item self.n_category = n_category self.n_hid = args.n_hid self.n_layers = args.n_layers self.mem_size = args.mem_size self.emb = nn.Parameter(torch.empty(n_user + n_item + n_category, self.n_hid)) self.norm = nn.LayerNorm((args.n_layers + 1) * self.n_hid) self.layers = nn.ModuleList() for i in range(0, self.n_layers): self.layers.append(GNNLayer(self.n_hid, self.n_hid, self.mem_size, 5, layer_norm=True, dropout=args.dropout, activation=nn.LeakyReLU(0.2, inplace=True))) self.pool = GraphPooling('mean') self.reset_parameters()

然后，将传入的参数赋值给实例变量 self.n_user、self.n_item 和 self.n_category，分别表示用户数量、物品数量和类别数量。 接下来，从参数 args 中获取隐藏层大小（n_hid）、层数（n_layers）和记忆大小（mem_...

self.dilation_rate = dilation_rate self.nb_filters = nb_filters self.kernel_size = kernel_size self.padding = padding self.activation = activation self.dropout_rate = dropout_rate self.use_batch_norm = use_batch_norm self.use_layer_norm = use_layer_norm self.kernel_initializer = kernel_initializer self.layers = [] self.layers_outputs = [] self.shape_match_conv = None self.res_output_shape = None self.final_activation = None

这段代码是定义一个卷积神经网络中的一个卷积层的各种参数和属性。具体解释如下： - dilation_rate: 空洞率，即卷积核中的间隔数，用于增加卷积层的...- final_activation: 最后的激活函数，用于输出最终的特征图像。

self.input_size = input_size self.output_size = output_size self.hidden_size_list = hidden_size_list self.hidden_layer_num = len(hidden_size_list) self.use_dropout = use_dropout self.weight_decay_lambda = weight_decay_lambda self.use_batchnorm = use_batchnorm self.params = {} # 初始化权重 self.__init_weight(weight_init_std) # 生成层 activation_layer = {'sigmoid': Sigmoid, 'relu': Relu} self.layers = OrderedDict()

接下来，函数创建了一个名为activation_layer的字典，该字典用于存储激活函数。字典的键是激活函数的名称，值是对应的激活函数类。最后，函数创建了一个有序字典layers，用于存储神经网络的各个层。

import pandas as pd import warnings import sklearn.datasets import sklearn.linear_model import matplotlib import matplotlib.font_manager as fm import matplotlib.pyplot as plt import numpy as np import seaborn as sns data = pd.read_excel(r'C:\Users\Lenovo\Desktop\data.xlsx') print(data.info()) fig = plt.figure(figsize=(10, 8)) sns.heatmap(data.corr(), cmap="YlGnBu", annot=True) plt.title('相关性分析热力图') plt.rcParams['axes.unicode_minus'] = False plt.rcParams['font.sans-serif'] = 'SimHei' plt.show() y = data['y'] x = data.drop(['y'], axis=1) print('************************输出新的特征集数据***************************') print(x.head()) from sklearn.model_selection import train_test_split x_train, x_test, y_train, y_test = train_test_split(x, y, test_size=0.2, random_state=42) def relu(x): output=np.maximum(0, x) return output def relu_back_propagation(derror_wrt_output,x): derror_wrt_dinputs = np.array(derror_wrt_output, copy=True) derror_wrt_dinputs[x <= 0] = 0 return derror_wrt_dinputs def activated(activation_choose,x): if activation_choose == 'relu': return relu(x) def activated_back_propagation(activation_choose, derror_wrt_output, output): if activation_choose == 'relu': return relu_back_propagation(derror_wrt_output, output) class NeuralNetwork: def __init__(self, layers_strcuture, print_cost = False): self.layers_strcuture = layers_strcuture self.layers_num = len(layers_strcuture) self.param_layers_num = self.layers_num - 1 self.learning_rate = 0.0618 self.num_iterations = 2000 self.x = None self.y = None self.w = dict() self.b = dict() self.costs = [] self.print_cost = print_cost self.init_w_and_b() def set_learning_rate(self,learning_rate): self.learning_rate=learning_rate def set_num_iterations(self, num_iterations): self.num_iterations = num_iterations def set_xy(self, input, expected_output): self.x = input self.y = expected_output

self.param_layers_num = self.layers_num - 1 self.learning_rate = 0.0618 self.num_iterations = 2000 self.x = None self.y = None self.w = dict() self.b = dict() self.costs = [] self.print_cost ...

class MobileNetV2Head(nn.Cell): def __init__(self, input_channel=1280, num_classes=1000, has_dropout=False, activation="None"): super(MobileNetV2Head, self).__init__() # mobilenet head head = ([GlobalAvgPooling()] if not has_dropout else [GlobalAvgPooling(), nn.Dropout(0.2)]) self.head = nn.SequentialCell(head) self.dense = nn.Dense(input_channel, num_classes, has_bias=True) self.need_activation = True if activation == "Sigmoid": self.activation = ops.Sigmoid() elif activation == "Softmax": self.activation = ops.Softmax() else: self.need_activation = False self._initialize_weights() def construct(self, x): x = self.head(x) x = self.dense(x) if self.need_activation: x = self.activation(x) return x

最后，根据self.need_activation的值确定是否需要使用激活函数，如果需要，则将结果通过激活函数进行处理。 以上是MobileNetV2Head的构造函数和前向传播方法的主要内容。如果你还有其他问题，请继续提问。

class Voice_Model(tf.keras.Model): def __init__(self,config): self.config = config super(Voice_Model,self).__init__() self.lstm_1=tf.keras.layers.LSTM(config.num_filters,dropout=0.5,return_sequences=True,unroll=True) self.lstm_2 = tf.keras.layers.LSTM(config.num_filters, dropout=0.5, unroll=True) self.fc= tf.keras.layers.Dense(config.hidden_dim) self.dro = tf.keras.layers.Dropout(0.5) self.outlater = tf.keras.layers.Dense(config.num_classes,activation='softmax') def __call__(self,inputs,training=None,**kwargs): x = inputs x = self.lstm_1(x) x = self.lstm_2(x) x = self.fc(x) x = self.outlater(x) return x

在这个类中，__init__ 方法定义了模型的结构，包括两个 LSTM 层、一个全连接层和一个 dropout 层。其中，config 是一个配置对象，用于定义模型的参数。__call__ 方法定义了模型的计算过程，接收输入 inputs ...

class GNNLayer(nn.Module): def __init__(self, in_feats, out_feats, mem_size, num_rels, bias=True, activation=None, self_loop=True, dropout=0.0, layer_norm=False): super(GNNLayer, self).__init__() self.in_feats = in_feats self.out_feats = out_feats self.mem_size = mem_size self.num_rels = num_rels self.bias = bias self.activation = activation self.self_loop = self_loop self.layer_norm = layer_norm self.node_ME = MemoryEncoding(in_feats, out_feats, mem_size) self.rel_ME = nn.ModuleList([ MemoryEncoding(in_feats, out_feats, mem_size) for i in range(self.num_rels) ]) if self.bias: self.h_bias = nn.Parameter(torch.empty(out_feats)) nn.init.zeros_(self.h_bias) if self.layer_norm: self.layer_norm_weight = nn.LayerNorm(out_feats) self.dropout = nn.Dropout(dropout)

- self_loop：是否使用自环（self-loop）边。 - dropout：Dropout 的概率。 - layer_norm：是否使用层归一化（layer normalization）。 接下来，具体说明 GNNLayer 类的初始化过程： - 调用 super() ...

class DSFANet(object): def __init__(self, num=None): self.num = num self.output_num = 6 self.hidden_num = 128 self.layers = 2 self.reg = 1e-4 self.activation = tf.nn.softsign self.init = tf.initializers.he_normal()

这是一个 Python 代码段，用于初始化 DSFANet 类的实例。它定义了一些参数，包括 num、output_num、hidden_num、layers、reg、activation 和 init。这些参数将用于构建 DSFANet 模型。

class GraphSAGE(nn.Module): def __init__(self, in_feats, hidden_feats, out_feats, num_layers, activation): super(GraphSAGE, self).__init__() self.num_layers = num_layers self.conv1 = SAGEConv(in_feats, hidden_feats, aggregator_type='mean') self.convs = nn.ModuleList() for i in range(num_layers - 2): self.convs.append(SAGEConv(hidden_feats, hidden_feats, aggregator_type='mean')) self.conv_last = SAGEConv(hidden_feats, out_feats, aggregator_type='mean') self.activation = activation def forward(self, blocks, x): h = x for i, block in enumerate(blocks): h_dst = h[:block.number_of_dst_nodes()] h = self.convs[i](block, (h, h_dst)) if i != self.num_layers - 2: h = self.activation(h) h = self.conv_last(blocks[-1], (h, h_dst)) return h改写一下，让它适用于异质图

def __init__(self, in_feats, hidden_feats, out_feats, num_layers, activation): super(GraphSAGE, self).__init__() self.num_layers = num_layers self.conv1 = SAGEConv(in_feats, hidden_feats, ...

def forward(self, g, feat): with g.local_scope(): g.ndata['h'] = feat g.update_all(self.message_func1, fn.mean(msg='m', out='h')) # g.update_all(self.message_func2, fn.mean(msg='m', out='h')) node_rep = g.ndata['h'] if self.layer_norm: node_rep = self.layer_norm_weight(node_rep) if self.bias: node_rep = node_rep + self.h_bias if self.self_loop: h = self.node_ME(feat, feat) node_rep = node_rep + h if self.activation: node_rep = self.activation(node_rep) node_rep = self.dropout(node_rep) return node_rep

最后，对节点特征进行 dropout 操作，并将结果返回。 这段代码展示了 GNNLayer 中前向计算的具体实现。在前向计算过程中，首先进行消息传递和聚合操作，然后根据需要对节点特征进行一系列的转换和操作，最终得到...

解释一下这段代码：class ResnetBlock(Model): def __init__(self, filters, strides=1,residual_path=False): super(ResnetBlock, self).__init__() self.filters = filters self.strides = strides self.residual_path = residual_path self.c1 = Conv2D(filters, (3, 3), strides=strides, padding='same', use_bias=False) self.b1 = BatchNormalization() self.a1 = Activation('relu') self.c2 = Conv2D(filters, (3, 3), strides=1, padding='same', use_bias=False) self.b2 = BatchNormalization() if residual_path: self.down_c1 = Conv2D(filters, (1, 1),strides=strides, padding='same', use_bias=False) self.down_b1 = BatchNormalization() self.a2 = Activation('relu') def call(self, inputs): residual = inputs x = self.c1(inputs) x = self.b1(x) x = self.a1(x) x = self.c2(x) y = self.b2(x) if self.residual_path: residual = self.down_c1(inputs) residual = self.down_b1(residual) out = self.a2(y + residual) return out class ResNet18(Model): def __init__(self, block_list, initial_filters=64): super(ResNet18, self).__init__() self.num_blocks = len(block_list) self.block_list = block_list self.out_filters = initial_filters self.c1 = Conv2D(self.out_filters, (3, 3), strides=1, padding='same', use_bias=False, kernel_initializer='he_normal') self.b1 = BatchNormalization() self.a1 = Activation('relu') self.blocks = tf.keras.models.Sequential() for block_id in range(len(block_list)): for layer_id in range(block_list[block_id]): if block_id != 0 and layer_id == 0: block = ResnetBlock(self.out_filters, strides=2, residual_path=True) else: block = ResnetBlock(self.out_filters, residual_path=False) self.blocks.add(block) self.out_filters *= 2 self.p1 = tf.keras.layers.GlobalAveragePooling2D() self.f1 = tf.keras.layers.Dense(41, activation='tanh') def call(self, inputs): x = self.c1(inputs) x = self.b1(x) x = self.a1(x) x = self.blocks(x) x = self.p1(x) y = self.f1(x) return y

这段代码定义了两个类：ResnetBlock和ResNet18。ResnetBlock是ResNet18的基本模块，用于构建ResNet18的主体结构。ResnetBlock包含两个卷积层和批归一化层，以及一个残差路径。ResNet18是一个由ResnetBlock组成的深度...

import torch import torch.nn as nn from torch.autograd import Variable import numpy as np class RNNcell(nn.Module): def __init__(self, input_size, hidden_size, act_fn='tanh'): super(RNNcell, self).__init__() self.input_size = input_size self.hidden_size = hidden_size self.act_fn = act_fn if self.act_fn not in ["tanh", "relu"]: raise ValueError("Activation function must be 'tanh' or 'relu'.") self.i2h = nn.Linear(input_size, hidden_size) self.h2h = nn.Linear(hidden_size, hidden_size) self.reset_parameters() def reset_parameters(self): """规范化参数""" std = 1.0 / np.sqrt(self.hidden_size) for w in self.parameters(): w.data.uniform_(-std, std) def forward(self, input, hx=None): if hx is None: hx = Variable(input.new_zeros(input.size(0), self.hidden_size)) hy = (self.i2h(input) + self.h2h(hx)) if self.act_fn == "tanh": hy = torch.tanh(hy) elif self.act_fn == "relu": hy = torch.relu(hy) return hy解释一下这段代码

这段代码定义了一个RNNcell的类，表示一个RNN的一个时间步的计算，其中包括初始化方法和前向传播方法。在初始化方法中，定义了输入大小、隐藏层大小和激活函数类型，然后...其中，reset_parameters方法用于规范化参数。

解释一下这段代码import pdb import tensorflow as tf from matplotlib import pyplot as plt import numpy as np import os from tensorflow.keras import Model from tensorflow.keras.layers import Conv2D,BatchNormalization,Activation,MaxPool2D,Dense,Dropout,Flatten,GlobalAveragePooling2D np.set_printoptions(threshold=np.inf) class ResnetBlock(Model): def __init__(self, filters, strides=1,residual_path=False): super(ResnetBlock, self).__init__() self.filters = filters self.strides = strides self.residual_path = residual_path self.c1 = Conv2D(filters, (3, 3), strides=strides, padding='same', use_bias=False) self.b1 = BatchNormalization() self.a1 = Activation('relu') self.c2 = Conv2D(filters, (3, 3), strides=1, padding='same', use_bias=False) self.b2 = BatchNormalization() if residual_path: self.down_c1 = Conv2D(filters, (1, 1),strides=strides, padding='same', use_bias=False) self.down_b1 = BatchNormalization() self.a2 = Activation('relu') def call(self, inputs): residual = inputs x = self.c1(inputs) x = self.b1(x) x = self.a1(x) x = self.c2(x) y = self.b2(x) if self.residual_path: residual = self.down_c1(inputs) residual = self.down_b1(residual) out = self.a2(y + residual) return out class ResNet18(Model): def __init__(self, block_list, initial_filters=64): super(ResNet18, self).__init__() self.num_blocks = len(block_list) self.block_list = block_list self.out_filters = initial_filters self.c1 = Conv2D(self.out_filters, (3, 3), strides=1, padding='same', use_bias=False, kernel_initializer='he_normal') self.b1 = BatchNormalization() self.a1 = Activation('relu') self.blocks = tf.keras.models.Sequential() for block_id in range(len(block_list)): for layer_id in range(block_list[block_id]): if block_id != 0 and layer_id == 0: block = ResnetBlock(self.out_filters, strides=2, residual_path=True) else: block = ResnetBlock(self.out_filters, residual_path=False) self.blocks.add(block) self.out_filters *= 2 self.p1 = tf.keras.layers.GlobalAveragePooling2D() self.f1 = tf.keras.layers.Dense(41, activation='tanh') def call(self, inputs): x = self.c1(inputs) x = self.b1(x) x = self.a1(x) x = self.blocks(x) x = self.p1(x) y = self.f1(x) return y

这段代码实现了一个ResNet18的模型。ResNet是深度学习中非常著名的神经网络模型之一，它的主要贡献在于解决了深度神经网络中的梯度消失问题，使得神经网络可以更深更复杂。ResNet18是ResNet的一个较小规模的版本，...

详细解释一下这段代码：class ResnetBlock(Model): def init(self, filters, strides=1,residual_path=False): super(ResnetBlock, self).init() self.filters = filters self.strides = strides self.residual_path = residual_path self.c1 = Conv2D(filters, (3, 3), strides=strides, padding='same', use_bias=False) self.b1 = BatchNormalization() self.a1 = Activation('relu') self.c2 = Conv2D(filters, (3, 3), strides=1, padding='same', use_bias=False) self.b2 = BatchNormalization() if residual_path: self.down_c1 = Conv2D(filters, (1, 1),strides=strides, padding='same', use_bias=False) self.down_b1 = BatchNormalization() self.a2 = Activation('relu') def call(self, inputs): residual = inputs x = self.c1(inputs) x = self.b1(x) x = self.a1(x) x = self.c2(x) y = self.b2(x) if self.residual_path: residual = self.down_c1(inputs) residual = self.down_b1(residual) out = self.a2(y + residual) return out class ResNet18(Model): def init(self, block_list, initial_filters=64): super(ResNet18, self).init() self.num_blocks = len(block_list) self.block_list = block_list self.out_filters = initial_filters self.c1 = Conv2D(self.out_filters, (3, 3), strides=1, padding='same', use_bias=False, kernel_initializer='he_normal') self.b1 = BatchNormalization() self.a1 = Activation('relu') self.blocks = tf.keras.models.Sequential() for block_id in range(len(block_list)): for layer_id in range(block_list[block_id]): if block_id != 0 and layer_id == 0: block = ResnetBlock(self.out_filters, strides=2, residual_path=True) else: block = ResnetBlock(self.out_filters, residual_path=False) self.blocks.add(block) self.out_filters *= 2 self.p1 = tf.keras.layers.GlobalAveragePooling2D() self.f1 = tf.keras.layers.Dense(41, activation='tanh') def call(self, inputs): x = self.c1(inputs) x = self.b1(x) x = self.a1(x) x = self.blocks(x) x = self.p1(x) y = self.f1(x) return y

这段代码定义了两个类：...其中，block_list 参数表示每个残差块包含的 ResnetBlock 个数，initial_filters 参数表示初始通道数。如果不是第一个残差块并且是第一个 ResnetBlock，则使用 strides=2 进行下采样。

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