建構函式

//標頭檔案    include/caffe/layer.hpp
//實現檔案  src/caffe/layer.cpp
//         src/caffe/layer.cu

/*
 *    建構函式
 *    子類中修改建構函式，自定義設定在SetUp()中設定
 */
explicit  Layer(const LayerParameter &param)

protect 變數

  /** The protobuf that stores the layer parameters */
  //儲存layer引數的protobuf物件
  LayerParameter layer_param_;
	
  /** The phase: TRAIN or TEST */
	//哪個階段， TRAIN還是TEST
  Phase phase_;
  /** The vector that stores the learnable parameters as a set of blobs. */
	//blobs，儲存需要學習的的引數
  vector<shared_ptr<Blob<Dtype> > > blobs_;
	
  /** Vector indicating whether to compute the diff of each param blob. */
	//陣列，表徵需要學習的引數blob是否需要計算梯度
  vector<bool> param_propagate_down_;

  /** The vector that indicates whether each top blob has a non-zero weight in
   *  the objective function. */
  //陣列，表徵每個top blob是否在目標函式中具有非零權重
  vector<Dtype> loss_;
 

常見操作：

//ReshapLike(),輸入與輸出層形狀保持一致
top[0]->ReshapeLike(*bottom[0]);