TensorFlow入坑第一步:安装

TensorFlow是谷歌基于DistBelief进行研发的第二代人工智能学习系统，其命名来源于本身的运行原理。Tensor（张量）意味着N维数组，Flow（流）意味着基于数据流图的计算，TensorFlow为张量从流图的一端流动到另一端计算过程。TensorFlow是将复杂的数据结构传输至人工智能神经网中进行分析和处理过程的系统。
TensorFlow可被用于语音识别或图像识别等多项机器学习和深度学习领域，对2011年开发的深度学习基础架构DistBelief进行了各方面的改进，它可在小到一部智能手机、大到数千台数据中心服务器的各种设备上运行。TensorFlow将完全开源，任何人都可以用。

环境：Ubuntu 14.04(Linux)x64

$ sudo apt-get install python-pip python-dev

Do you want to continue? [Y/n]

$ sudo pip install --upgrade
https://storage.googleapis.com/tensorflow/linux/cpu/tensorflow-0.8.0-cp27-none-linux_x86_64.whl

pip install --upgrade pip

$ python -m tensorflow.models.image.mnist.convolutional

Successfully downloaded train-images-idx3-ubyte.gz 9912422 bytes.
Successfully downloaded train-labels-idx1-ubyte.gz 28881 bytes.
Successfully downloaded t10k-images-idx3-ubyte.gz 1648877 bytes.
Successfully downloaded t10k-labels-idx1-ubyte.gz 4542 bytes.
Extracting data/train-images-idx3-ubyte.gz
Extracting data/train-labels-idx1-ubyte.gz
Extracting data/t10k-images-idx3-ubyte.gz
Extracting data/t10k-labels-idx1-ubyte.gz
Initialized!
Step 0 (epoch 0.00), 68.8 ms
Minibatch loss: 12.053, learning rate: 0.010000
Minibatch error: 90.6%
Validation error: 84.6%
Step 100 (epoch 0.12), 1197.0 ms
Minibatch loss: 3.283, learning rate: 0.010000
Minibatch error: 6.2%
Validation error: 6.8%
Step 200 (epoch 0.23), 1231.3 ms
Minibatch loss: 3.455, learning rate: 0.010000
Minibatch error: 17.2%
Validation error: 4.0%
Step 300 (epoch 0.35), 1147.7 ms
Minibatch loss: 3.248, learning rate: 0.010000
Minibatch error: 7.8%
Validation error: 3.3%
Step 400 (epoch 0.47), 1139.3 ms
Minibatch loss: 3.213, learning rate: 0.010000
Minibatch error: 7.8%
Validation error: 2.6%
Step 500 (epoch 0.58), 1159.7 ms
Minibatch loss: 3.301, learning rate: 0.010000
Minibatch error: 9.4%
Validation error: 2.5%