import tensorflow as tf

    def __init__(self,name,input_dim,out_dim,
                 k_h=4,k_w=4,d_h=2,d_w=2,stddev=0.02,data_format='NHWC',epsilon=1e-9) :
        with tf.variable_scope(name) :
            assert data_format == 'NHWC'
