Merge pull request #2 from skylarch/develop

Fix quick_start

source/quick_start/fit_a_line/image/predictions.png

-../../../../book/01.fit_a_line/image/predictions.png
\ No newline at end of file

source/quick_start/fit_a_line/image/ranges.png

-../../../../book/01.fit_a_line/image/ranges.png
\ No newline at end of file

source/quick_start/fit_a_line/image/train_and_test.png

-../../../../book/01.fit_a_line/image/train_and_test.png
\ No newline at end of file

source/quick_start/fit_a_line/index.md

@@ -8,7 +8,7 @@
 本教程源代码目录在[book/fit_a_line](https://github.com/PaddlePaddle/book/tree/develop/01.fit_a_line)， 初次使用请参考PaddlePaddle[安装教程](https://github.com/PaddlePaddle/book/blob/develop/README.cn.md#运行这本书)，更多内容请参考本教程的[视频课堂](http://bit.baidu.com/course/detail/id/137.html)。
 
 ## 背景介绍
-给定一个大小为$n$的数据集  ${\{y_{i}, x_{i1}, ..., x_{id}\}}_{i=1}^{n}$，其中$x_{i1}, \ldots, x_{id}$是第$i$个样本$d$个属性上的取值，$y_i$是该样本待预测的目标。线性回归模型假设目标$y_i$可以被属性间的线性组合描述，即
+给定一个大小为$$n$$的数据集  ${\{y_{i}, x_{i1}, ..., x_{id}\}}_{i=1}^{n}$，其中$x_{i1}, \ldots, x_{id}$是第$i$个样本$d$个属性上的取值，$y_i$是该样本待预测的目标。线性回归模型假设目标$y_i$可以被属性间的线性组合描述，即
 
 $$y_i = \omega_1x_{i1} + \omega_2x_{i2} + \ldots + \omega_dx_{id} + b,  i=1,\ldots,n$$
 

source/quick_start/recognize_digits/image/cnn.png

-../../../../book/02.recognize_digits/image/cnn.png
\ No newline at end of file

source/quick_start/recognize_digits/image/cnn_train_log.png

-../../../../book/02.recognize_digits/image/cnn_train_log.png
\ No newline at end of file

source/quick_start/recognize_digits/image/conv_layer.png

-../../../../book/02.recognize_digits/image/conv_layer.png
\ No newline at end of file

source/quick_start/recognize_digits/image/infer_3.png

-../../../../book/02.recognize_digits/image/infer_3.png
\ No newline at end of file

source/quick_start/recognize_digits/image/max_pooling.png

-../../../../book/02.recognize_digits/image/max_pooling.png
\ No newline at end of file

source/quick_start/recognize_digits/image/mlp.png

-../../../../book/02.recognize_digits/image/mlp.png
\ No newline at end of file

source/quick_start/recognize_digits/image/mlp_train_log.png

-../../../../book/02.recognize_digits/image/mlp_train_log.png
\ No newline at end of file

source/quick_start/recognize_digits/image/mnist_example_image.png

-../../../../book/02.recognize_digits/image/mnist_example_image.png
\ No newline at end of file

source/quick_start/recognize_digits/image/softmax_regression.png

-../../../../book/02.recognize_digits/image/softmax_regression.png
\ No newline at end of file

source/quick_start/recognize_digits/image/softmax_train_log.png

-../../../../book/02.recognize_digits/image/softmax_train_log.png
\ No newline at end of file

source/quick_start/recognize_digits/image/train_and_test.png

-../../../../book/02.recognize_digits/image/train_and_test.png
\ No newline at end of file