bn层 lr_mult：0

[yu1206]

训练时 ，bn层 lr_mult 为什么是0

layer {
bottom: "conv1"
top: "conv1"
name: "bn_conv1"
type: "BatchNorm"
batch_norm_param {
use_global_stats: false
}
param { lr_mult: 0 }
param { lr_mult: 0 }
param { lr_mult: 0 }
}