L2Decay

• paddle.fluid.regularizer.L2Decay

L2Decay实现L2权重衰减正则化，用于模型训练，有助于防止模型对训练数据过拟合。

具体实现中，L2权重衰减正则化的计算公式如下：

• 参数:
• • regularization_coeff (float) – 正则化系数，默认值为0.0。

代码示例

import paddle.fluid as fluid
 
main_prog = fluid.Program()
startup_prog = fluid.Program()
with fluid.program_guard(main_prog, startup_prog):
    data = fluid.layers.data(name='image', shape=[3, 28, 28], dtype='float32')
    label = fluid.layers.data(name='label', shape=[1], dtype='int64')
    hidden = fluid.layers.fc(input=data, size=128, act='relu')
    prediction = fluid.layers.fc(input=hidden, size=10, act='softmax')
    loss = fluid.layers.cross_entropy(input=prediction, label=label)
    avg_loss = fluid.layers.mean(loss)
optimizer = fluid.optimizer.Adagrad(
    learning_rate=1e-4,
    regularization=fluid.regularizer.L2Decay(
        regularization_coeff=0.1))
optimizer.minimize(avg_loss)