反卷积层参数设置

1. Bilinear 
   作用：一般用在deconvolution 层做upsampling，例子如下：

layer {  name: "upsample", type: "Deconvolution"  bottom: "{{bottom_name}}" top: "{{top_name}}"  convolution_param {    kernel_size: {{2 * factor - factor % 2}} stride: {{factor}}    num_output: {{C}} group: {{C}}    pad: {{ceil((factor - 1) / 2.)}}    weight_filler: { type: "bilinear" } bias_term: false  }  param { lr_mult: 0 decay_mult: 0 }}