1.Nan错误
InvalidArgumentError (see above for traceback): Nan in summary histogram for: fc6/weights_0 [[Node: fc6/weights_0 = HistogramSummary[T=DT_FLOAT, _device="/job:localhost/replica:0/task:0/device:CPU:0"](fc6/weights_0/tag, fc6/weights/read)]]
学习率设置0.1太大，改成0.0001后就没问题了。