tensorflow自动编码器无法在训练中学习答案

【问题标题】：tensorflow autoencoder can not learn in trainingtensorflow自动编码器无法在训练中学习
【发布时间】：2017-07-10 01:32:14
【问题描述】：

在我的代码中，我正在尝试练习使用 tr.train.batch 函数。在sess.run([optimizer]) 行中，它不返回任何内容，只是被冻结。你能找出我的错误吗？

tensors = tf.convert_to_tensor(x_train, dtype=tf.float32)
tensors = tf.reshape(tensors, shape=x_train.shape)
batch = tf.train.batch([tensors], batch_size=BATCH_SIZE, enqueue_many=True)

# Weights and biases to hidden layer
Wh = tf.Variable(tf.random_normal([COLUMN-2, UNITS_OF_HIDDEN_LAYER],  mean=0.0, stddev=0.05))
bh = tf.Variable(tf.zeros([UNITS_OF_HIDDEN_LAYER]))
h = tf.nn.tanh(tf.matmul(batch, Wh) + bh)
# Weights and biases to output layer
Wo = tf.transpose(Wh) # tied weights
bo = tf.Variable(tf.zeros([COLUMN-2]))
y = tf.nn.tanh(tf.matmul(h, Wo) + bo)

# Objective functions
mean_sqr = tf.reduce_mean(tf.pow(batch - y, 2))
optimizer = tf.train.AdamOptimizer(LEARNING_RATE).minimize(mean_sqr)
init = tf.global_variables_initializer()
sess = tf.Session()
sess.run(init)

for j in range(TRAINING_EPOCHS):
    sess.run([optimizer])
    print("optimizer: ")

【问题讨论】：

标签： optimization tensorflow batch-processing autoencoder

【解决方案1】：

tf.train.batch 是一个队列，因此您需要在会话中使用tf.train.start_queue_runners 启动队列。您可以在 tensorflow 的 threading and Queues guide 中了解这一点。

进行以下更改：

with tf.Session() as sess:
sess.run(init_op)
coord = tf.train.Coordinator()
threads = tf.train.start_queue_runners(coord=coord)  
try:
    # Training loop
    for j in range(TRAINING_EPOCHS):
        if coord.should_stop():
            break
        sess.run([optimizer])
        print("optimizer: ")

except Exception, e:
    # When done, ask the threads to stop.
    coord.request_stop(e)

finally:
    coord.request_stop()
   # Wait for threads to finish.
coord.join(threads)

【讨论】：