Feature/op standard (#12860)
Feature/op standard (#12860)

* new doc

* standard

PaddlePaddle/Paddle,PaddlePaddle/Paddle,tensor-tang/Paddle,baidu/Paddle,luotao1/Paddle,luotao1/Paddle,reyoung/Paddle,PaddlePaddle/Paddle,luotao1/Paddle,baidu/Paddle,chengduoZH/Paddle,PaddlePaddle/Paddle,tensor-tang/Paddle,reyoung/Paddle,PaddlePaddle/Paddle,QiJune/Paddle,baidu/Paddle,chengduoZH/Paddle,reyoung/Paddle,luotao1/Paddle,tensor-tang/Paddle,QiJune/Paddle,tensor-tang/Paddle,baidu/Paddle,QiJune/Paddle,luotao1/Paddle,PaddlePaddle/Paddle,PaddlePaddle/Paddle,chengduoZH/Paddle,tensor-tang/Paddle,chengduoZH/Paddle,QiJune/Paddle,QiJune/Paddle,reyoung/Paddle,reyoung/Paddle,chengduoZH/Paddle,luotao1/Paddle,baidu/Paddle,luotao1/Paddle,reyoung/Paddle,QiJune/Paddle