mindelec.loss.NetWithEval
- class mindelec.loss.NetWithEval(net_without_loss, constraints, loss='l2', dataset_input_map=None)[源代码]
具有评估损失的网络封装类。
- 参数:
net_without_loss (Cell) - 无损失定义的训练网络。
constraints (Constraints) - pde问题的约束函数。
loss (Union[str, dict, Cell]) - 损失函数的名称,例如”l1”,”l2”和”mae”等。默认值:”l2”。
dataset_input_map (dict) - 数据集的输入映射,如果输入为None,第一列将被设置为输入。默认值:None。
- 输入:
inputs (Tensor) - 输入是可变长度参数,包含网络输入和标签。
- 输出:
Tuple,包含标量损失Tensor、shape为 \((N, \ldots)\) 的网络输出Tensor和shape为 \((\) 的标签Tensor。
- 支持平台:
Ascend
样例:
>>> import numpy as np >>> from mindelec.loss import Constraints, NetWithEval >>> from mindspore import Tensor, nn >>> class Net(nn.Cell): ... def __init__(self, input_dim, output_dim): ... super(Net, self).__init__() ... self.fc1 = nn.Dense(input_dim, 64) ... self.fc2 = nn.Dense(64, output_dim) ... ... def construct(self, *input): ... x = input[0] ... out = self.fc1(x) ... out = self.fc2(out) ... return out >>> net = Net(3, 3) >>> # For details about how to build the Constraints, please refer to the tutorial >>> # document on the official website. >>> constraints = Constraints(dataset, pde_dict) >>> loss_network = NetWithEval(net, constraints) >>> input = Tensor(np.ones([1000, 3]).astype(np.float32) * 0.01) >>> label = Tensor(np.ones([1000, 3]).astype(np.float32)) >>> output_data = loss_network(input, label)