改写以下代码，使其具有dropout功能： dbnParams.numLayers = 5; dbnParams.hidden_sizes = 3; num_class = 4; dbn.sizes = 100,100,100; opts.numepochs = 10;opts.batchsize = 27;opts.momentum = 0.1; opts.alpha = 0.01; opts.plot = 1; dbn = dbnsetup(dbn, trainXn, opts);%初始化RBM的参数 dbn = dbntrain(dbn, trainXn, opts); % 将DBN展开到神经网络，建立包含输出层的神经网络 nn = dbnunfoldtonn(dbn,size(trainY,2));%输出类别数 nn.activation_function = 'tanh_opt'; %激活函数'sigm' (sigmoid) or 'tanh_opt' (optimal tanh). nn.learningRate = 0.1; nn.dropoutFraction = 0.; opts.numepochs = 200; . opts.batchsize = 1; nn = nntrain(nn, [trainXn;testXn], [trainY;testY], opts); nn.output = ['softmax'];

dbnParams.numLayers = 5;
dbnParams.hidden_sizes = 3;
num_class = 4;
dbn.sizes = 100,100,100;
opts.numepochs = 10;
opts.batchsize = 27;
opts.momentum = 0.1;
opts.alpha = 0.01;
opts.plot = 1;
dbn = dbnsetup(dbn, trainXn, opts);%初始化RBM的参数
dbn = dbntrain(dbn, trainXn, opts); % 将DBN展开到神经网络，建立包含输出层的神经网络
nn = dbnunfoldtonn(dbn,size(trainY,2));%输出类别数
nn.activation_function = 'tanh_opt'; %激活函数'sigm' (sigmoid) or 'tanh_opt' (optimal tanh).
nn.learningRate = 0.1;
nn.dropoutFraction = 0.5; % 设置dropout的比例为0.5
opts.numepochs = 200;
opts.batchsize = 1;
nn = nntrain(nn, [trainXn;testXn], [trainY;testY], opts);
nn.output = ['softmax'];

相关问题

这段代码哪里错了 class my_BiGRU(torch.nn.Module): def __init__(self, input_size, hidden_size, num_layers, output_size, gru_dropout): super(my_BiGRU, self).__init__() self.input_size = input_size self.hidden_size = hidden_size self.num_layers = num_layers self.output_size = output_size self.gru_dropout = gru_dropout self.gru = torch.nn.GRU(input_size, hidden_size, num_layers=num_layers, batch_first=True, bidirectional=True) self.fc = torch.nn.Linear(hidden_size * 2, output_size) def _setup_BiGRU_layers(self): self.BiGRU_layers = my_BiGRU(input_size=self.args.capsule_out_dim, output_size=self.args.apsule_out_features, hidden_size=self.args.BiGRU_hiddensize, num_layers=self.args.BiGRU_layers, gru_dropout=self.args.BiGRU_dropout, )

这段代码存在两个问题：

1.函数 `_setup_BiGRU_layers` 中的代码应该是在类的构造函数 `__init__` 中进行初始化，而不是在另外一个函数中进行初始化。

2.在调用 `my_BiGRU` 类时，参数名称有误，应该将 `apsule_out_features` 改为 `capsule_out_features`。

改正后的代码如下所示：

class my_BiGRU(torch.nn.Module):
    def __init__(self, input_size, hidden_size, num_layers, output_size, gru_dropout, capsule_out_features):
        super(my_BiGRU, self).__init__()
        self.input_size = input_size
        self.hidden_size = hidden_size
        self.num_layers = num_layers
        self.output_size = output_size
        self.gru_dropout = gru_dropout
        
        self.gru = torch.nn.GRU(input_size, hidden_size, num_layers=num_layers, batch_first=True, bidirectional=True)
        self.fc = torch.nn.Linear(hidden_size * 2, output_size)
        
        self.BiGRU_layers = my_BiGRU(input_size=self.input_size,
                                     output_size=capsule_out_features,
                                     hidden_size=self.hidden_size,
                                     num_layers=self.num_layers,
                                     gru_dropout=self.gru_dropout,
                                    )

注意：这里假设 `capsule_out_dim` 和 `args` 都已经在代码中被定义好了。

def __init__(self, config): super(Model, self).__init__() if config.embedding_pretrained is not None: self.embedding = nn.Embedding.from_pretrained(config.embedding_pretrained, freeze=False) else: self.embedding = nn.Embedding(config.n_vocab, config.embed, padding_idx=config.n_vocab - 1) self.lstm = nn.LSTM(config.embed, config.hidden_size, config.num_layers, bidirectional=True, batch_first=True, dropout=config.dropout) self.fc = nn.Linear(config.hidden_size * 2, config.num_classes)

这是一个神经网络模型的初始化函数，它包含以下几个部分：

1. 调用父类的初始化函数，即nn.Module的__init__()方法。
2. 根据config中的embedding_pretrained是否为None，选择使用预训练的词向量还是随机初始化的词向量。如果使用预训练的词向量，则调用nn.Embedding.from_pretrained()方法加载预训练的词向量，否则使用nn.Embedding()方法随机初始化词向量。
3. 初始化一个LSTM层，其中输入维度为config.embed，隐藏状态维度为config.hidden_size，层数为config.num_layers，双向LSTM，batch_first设置为True，dropout为config.dropout。
4. 初始化一个全连接层，将LSTM输出的双向隐藏状态拼接后，经过一个线性变换得到最终的输出结果，输出维度为config.num_classes。

这个模型的输入是一个batch的词索引序列，输出是每个样本对应的类别。