class LSTMNet(torch.nn.Module): def __init__(self, num_hiddens, num_outputs): super(LSTMNet, self).__init__() #nn.Conv1d(1,16,2), #nn.Sigmoid(), # nn.MaxPool1d(2), #nn.Conv1d(1,32,2), self.hidden_size = num_hiddens # RNN 层，这里的 batch_first 指定传入的是 (批大小，序列长度，序列每个位置的大小) # 如果不指定其为 True，传入顺序应当是 (序列长度，批大小，序列每个位置的大小) input_size= num_inputs.view(len(input_x), 1, -1)//24 self.rnn = torch.nn.LSTM(input_size, hidden_size=num_hiddens,batch_first=True) # 线性层 self.dense = torch.nn.Linear(self.hidden_size*24, 256) self.dense2 = torch.nn.Linear(256,num_outputs) # dropout 层，这里的参数指 dropout 的概率 self.dropout = torch.nn.Dropout(0.3) self.dropout2 = torch.nn.Dropout(0.5) # ReLU 层 self.relu = torch.nn.ReLU() # 前向传播函数，这是一个拼接的过程，使用大量变量是为了避免混淆，不做过多讲解 def forward(self, x): # x shape: (batch_size, 24, 307) # LSTM 层会传出其参数，这里用 _ 将其舍弃 h, _ = self.rnn(x) # LSTM 层会传出 (batch_size, 24, num_hiddens) 个参数，故需要 reshape 后丢入全连接层 h_r = h.reshape(-1,self.hidden_size*24) h_d = self.dropout(h_r) y = self.dense(h_d) drop_y = self.dropout2(y) a = self.relu(drop_y) y2 = self.dense2(a) return y2

这是一个使用LSTM网络进行序列预测的模型，输入是一个形状为(batch_size, 24, 307)的张量。在模型的初始化方法中，定义了LSTM层、线性层、dropout层和ReLU层。在前向传播方法中，首先将输入张量传入LSTM层得到输出h，然后将h重新reshape成形状为(batch_size, num_hiddens*24)的张量，再经过线性层、dropout层和ReLU层得到最终的预测结果y2。

相关问题

class NormedLinear(nn.Module): def __init__(self, feat_dim, num_classes): super().__init__() self.weight = nn.Parameter(torch.Tensor(feat_dim, num_classes)) self.weight.data.uniform_(-1, 1).renorm_(2, 1, 1e-5).mul_(1e5) def forward(self, x): return F.normalize(x, dim=1).mm(F.normalize(self.weight, dim=0)) class LearnableWeightScalingLinear(nn.Module): def __init__(self, feat_dim, num_classes, use_norm=False): super().__init__() self.classifier = NormedLinear(feat_dim, num_classes) if use_norm else nn.Linear(feat_dim, num_classes) self.learned_norm = nn.Parameter(torch.ones(1, num_classes)) def forward(self, x): return self.classifier(x) * self.learned_norm class DisAlignLinear(nn.Module): def __init__(self, feat_dim, num_classes, use_norm=False): super().__init__() self.classifier = NormedLinear(feat_dim, num_classes) if use_norm else nn.Linear(feat_dim, num_classes) self.learned_magnitude = nn.Parameter(torch.ones(1, num_classes)) self.learned_margin = nn.Parameter(torch.zeros(1, num_classes)) self.confidence_layer = nn.Linear(feat_dim, 1) torch.nn.init.constant_(self.confidence_layer.weight, 0.1) def forward(self, x): output = self.classifier(x) confidence = self.confidence_layer(x).sigmoid() return (1 + confidence * self.learned_magnitude) * output + confidence * self.learned_margin class MLP_ConClassfier(nn.Module): def __init__(self): super(MLP_ConClassfier, self).__init__() self.num_inputs, self.num_hiddens_1, self.num_hiddens_2, self.num_hiddens_3, self.num_outputs \ = 41, 512, 128, 32, 5 self.num_proj_hidden = 32 self.mlp_conclassfier = nn.Sequential( nn.Linear(self.num_inputs, self.num_hiddens_1), nn.ReLU(), nn.Linear(self.num_hiddens_1, self.num_hiddens_2), nn.ReLU(), nn.Linear(self.num_hiddens_2, self.num_hiddens_3), ) self.fc1 = torch.nn.Linear(self.num_hiddens_3, self.num_proj_hidden) self.fc2 = torch.nn.Linear(self.num_proj_hidden, self.num_hiddens_3) self.linearclassfier = nn.Linear(self.num_hiddens_3, self.num_outputs) self.NormedLinearclassfier = NormedLinear(feat_dim=self.num_hiddens_3, num_classes=self.num_outputs) self.DisAlignLinearclassfier = DisAlignLinear(feat_dim=self.num_hiddens_3, num_classes=self.num_outputs, use_norm=True) self.LearnableWeightScalingLinearclassfier = LearnableWeightScalingLinear(feat_dim=self.num_hiddens_3, num_classes=self.num_outputs, use_norm=True)

这段代码定义了一个名为MLP_ConClassfier的神经网络模型，它包含了多个子模块，包括三个不同的分类器：NormedLinearclassfier、DisAlignLinearclassfier和LearnableWeightScalingLinearclassfier。这些分类器都是基于输入特征进行分类的，并且使用不同的方法来实现分类功能。此外，该模型还包含了一个MLP网络，用于将输入特征映射到更高维的特征空间中。该模型的输入特征维度为41，输出类别数为5。

为以下代码写注释：class TransformerClassifier(torch.nn.Module): def __init__(self, num_labels): super().__init__() self.bert = BertForSequenceClassification.from_pretrained('bert-base-chinese', num_labels=num_labels) # print(self.bert.config.hidden_size) #768 self.dropout = torch.nn.Dropout(0.1) self.classifier1 = torch.nn.Linear(640, 256) self.classifier2 = torch.nn.Linear(256, num_labels) self.regress1 = torch.nn.Linear(640, 256) self.regress2 = torch.nn.Linear(256, 2) self.regress3 = torch.nn.Linear(640, 256) self.regress4 = torch.nn.Linear(256, 2) # self.regress3 = torch.nn.Linear(64, 1) # self.regress3 = torch.nn.Linear(640, 256) # self.regress4 = torch.nn.Linear(256, 1) # self.soft1 = torch.nn.Softmax(dim=1) def forward(self, input_ids, attention_mask, token_type_ids): # outputs = self.bert(input_ids, attention_mask=attention_mask, token_type_ids=token_type_ids) # pooled_output = outputs.logits # # pooled_output = self.dropout(pooled_output) # # logits = self.classifier(pooled_output) outputs = self.bert(input_ids, attention_mask=attention_mask, token_type_ids=token_type_ids) logits = outputs.logits clas = F.relu(self.classifier1(logits)) clas = self.classifier2(clas) death = F.relu(self.regress1(logits)) # xingqi = F.relu(self.regress2(xingqi)) death = self.regress2(death) life = F.relu(self.regress3(logits)) # xingqi = F.relu(self.regress2(xingqi)) life = self.regress4(life) # fakuan = F.relu(self.regress3(logits)) # fakuan = self.regress4(fakuan) # print(logits.shape) # logits = self.soft1(logits) # print(logits) # print(logits.shape) return clas,death,life

注释如下：

class TransformerClassifier(torch.nn.Module):  # 定义一个名为TransformerClassifier的继承自nn.Module的类
    def __init__(self, num_labels):　# 初始化函数，num_labels为标签数
        super().__init__()  # 调用父类的构造函数
        self.bert = BertForSequenceClassification.from_pretrained('bert-base-chinese', num_labels=num_labels)  # 用预训练的中文Bert模型初始化self.bert, 输出维度为num_labels
        # print(self.bert.config.hidden_size) #768
        self.dropout = torch.nn.Dropout(0.1)  # 定义dropout层，丢弃概率为0.1
        self.classifier1 = torch.nn.Linear(640, 256)  # 定义一个全连接层，输入维度为640，输出维度为256
        self.classifier2 = torch.nn.Linear(256, num_labels)  # 定义一个全连接层，输入维度为256，输出维度为num_labels

        self.regress1 = torch.nn.Linear(640, 256)  # 定义一个全连接层，输入维度为640，输出维度为256
        self.regress2 = torch.nn.Linear(256, 2)  # 定义一个全连接层，输入维度为256，输出维度为2

        self.regress3 = torch.nn.Linear(640, 256)  # 定义一个全连接层，输入维度为640，输出维度为256
        self.regress4 = torch.nn.Linear(256, 2)  # 定义一个全连接层，输入维度为256，输出维度为2

    def forward(self, input_ids, attention_mask, token_type_ids):  # 前向传播函数，输入参数分别为input_ids、attention_mask、token_type_ids
        outputs = self.bert(input_ids, attention_mask=attention_mask, token_type_ids=token_type_ids)  # 将输入传入self.bert中，得到输出
        logits = outputs.logits  # 从输出中得到logits

        clas = F.relu(self.classifier1(logits))  # 将logits输入到self.classifier1中，经过relu函数后得到clas
        clas = self.classifier2(clas)  # 将clas输入到self.classifier2中，得到分类结果

        death = F.relu(self.regress1(logits))  # 将logits输入到self.regress1中，经过relu函数后得到death
        death = self.regress2(death)  # 将death输入到self.regress2中，得到死亡概率

        life = F.relu(self.regress3(logits))  # 将logits输入到self.regress3中，经过relu函数后得到life
        life = self.regress4(life)  # 将life输入到self.regress4中，得到生存概率

        return clas, death, life  # 返回分类结果、死亡概率、生存概率