From: @liyanliu96
Reviewed-by: @oacjiewen,@yingjy,@oacjiewen
Signed-off-by: @yingjy

Merge pull request !8189 from peixu_ren/master

Merge pull request !8118 from caojian05/ms_master_bugfix

Merge pull request !7948 from zhaoting/ssd

Merge pull request !8175 from VectorSL/alexnet

Merge pull request !8159 from lilei/modify_MetaTensor

Merge pull request !7951 from zhanghuiyao/4p_retinaface

Merge pull request !8099 from zhouyaqiang0/inceptionv3_lr

Merge pull request !7544 from zhouyaqiang0/master

Merge pull request !8004 from panfengfeng/update_readme

Merge pull request !7917 from caojian05/ms_master_googlenet_bugfix

Merge pull request !7972 from VectorSL/master

Merge pull request !7918 from caojian05/ms_master_vgg16_bugfix

Merge pull request !7909 from VectorSL/nhwc-script

Merge pull request !7887 from gengdongjie/master

Merge pull request !7878 from linqingke/cnnctc

Merge pull request !7834 from yuchaojie/quant

Merge pull request !7843 from panfengfeng/fix_nasnet_hung

Merge pull request !7853 from linqingke/psenet

Merge pull request !7865 from wukesong/modify-readme

Merge pull request !7605 from linqingke/cnnctc

Merge pull request !7633 from yuchaojie/quant2

Merge pull request !7583 from chenzhongming/zomi_master

Merge pull request !7641 from jiangzhenguang/amend_deeplabv3_readme_in_master