Merge branch 'PaddlePaddle:dygraph' into dygraph

PTDN/docs/install.md

+
+## 环境配置
+
+本教程适用于PTDN目录下基础功能测试的运行环境搭建。
+
+推荐环境：
+- CUDA 10.1
+- CUDNN 7.6
+- TensorRT 6.1.0.5 / 7.1
+
+
+推荐docker镜像安装，按照如下命令创建镜像，当前目录映射到镜像中的`/paddle`目录下
+```
+nvidia-docker run --name paddle -it -v $PWD:/paddle paddlepaddle/paddle:latest-dev-cuda10.1-cudnn7-gcc82 /bin/bash
+cd /paddle
+
+# 安装带TRT的paddle
+pip3.7 install https://paddle-wheel.bj.bcebos.com/with-trt/2.1.3/linux-gpu-cuda10.1-cudnn7-mkl-gcc8.2-trt6-avx/paddlepaddle_gpu-2.1.3.post101-cp37-cp37m-linux_x86_64.whl
+
+# 安装AutoLog
+git clone https://github.com/LDOUBLEV/AutoLog
+cd AutoLog
+pip3.7 install -r requirements.txt
+python3.7 setup.py bdist_wheel
+pip3.7 install ./dist/auto_log-1.0.0-py3-none-any.whl
+
+
+# 下载OCR代码
+cd ../
+git clone https://github.com/PaddlePaddle/PaddleOCR
+
+```
+
+安装PaddleOCR依赖：
+```
+cd PaddleOCR
+pip3.7 install -r requirements.txt
+```
+
+## FAQ :
+Q. You are using Paddle compiled with TensorRT, but TensorRT dynamic library is not found. Ignore this if TensorRT is not needed.
+
+A. 问题一般是当前安装paddle版本带TRT，但是本地环境找不到TensorRT的预测库，需要下载TensorRT库，解压后设置环境变量LD_LIBRARY_PATH;
+如：
+```
+export LD_LIBRARY_PATH=/usr/local/python3.7.0/lib:/usr/local/nvidia/lib:/usr/local/nvidia/lib64:/paddle/package/TensorRT-6.0.1.5/lib
+```
+或者问题是下载的TensorRT版本和当前paddle中编译的TRT版本不匹配，需要下载版本相符的TRT。