Merge pull request !1977 from JonathanY/randomwalk

Merge pull request !2188 from JesseKLee/deadcode

Merge pull request !2162 from h.farahat/slice_op

Merge pull request !2187 from ZiruiWu/vocab_rework

fix review comments

Merge pull request !2062 from liyong126/minddataset_split

Merge pull request !1899 from zhaoting/ResNet50_st

Merge pull request !2168 from chenzhongming/combined

Merge pull request !2178 from Margaret_wangrui/ascend_summary_nodes

Merge pull request !2097 from chenzhongming/master

Merge pull request !2174 from kisnwang/fix-cpu-reshape-bug

Merge pull request !2173 from limingqi107/gpu_memreuse_support_summary_node

Merge pull request !2119 from zhangdengcheng/master

Merge pull request !2153 from JoyLvliang/pynative-insert-transdata-for-hook-mode

Merge pull request !2171 from zhaozhenlong/fix-issues-quant-not-exposed-ssim-ksize-check

Merge pull request !2175 from zhaozhenlong/fix-issues-ascend-quant-move-to-inner-ops

Merge pull request !2165 from liuxiao/central_crop

Merge pull request !2169 from zhangbuxue/Change_the_get_value_out_of_bounds_error_to_IndexError

Merge pull request !2156 from liangzelang/master

Merge pull request !2094 from limingqi107/gpu_optimize_Nop

Merge pull request !2166 from VectorSL/update-argmaxwithvalue

Merge pull request !2170 from guozhijian/fix_info

Merge pull request !2071 from wangnan39/support_loss_scale_for_sparse_optimizer

Merge pull request !2105 from yanghaitao/yht_profiling_device_queue

Merge pull request !2158 from wangnan39/modify_annotations_of_sparse_adam

Merge pull request !1797 from chenweifeng/gpu_bert

Merge pull request !2135 from guozhijian/add_tools_tfrecord_to_mindrecord