Merge pull request !1118 from huanghui/batchnormgrad-to-bninfergrad-pass

Merge pull request !1157 from ms_yan/concat_dataset

Merge pull request !1126 from xiefangqi/voc_support_detection

Merge pull request !1098 from huanghui/add-batchnorm-bninfer-pass

change to use __add__ operation instead ds.concat

Merge pull request !1113 from dengwentao/rts

Merge pull request !1149 from panyifeng/fix_pylint

Merge pull request !1139 from JesseKLee/timing_hole

Merge pull request !1131 from xulei/filter_op

Merge pull request !1124 from YuJianfeng/master

Merge pull request !999 from liyong126/mindrecord_file_list

Merge pull request !1079 from lianliguang/convert-to-AICPU-when-AiCore-not-supported-kernel

Merge pull request !998 from guozhijian/enhance_format_func_name

support for 1 specific dimension to be None, added validator

fix various CI complains

another round of CI fixes

ci

refactor parts of the code

code refactor

ci fix

comments added, fix bugs

address review comments

address review comments

review cmts

added simple perf test script

update pad code

perf imprv

Merge pull request !847 from ZhangQinghua/opt

Merge pull request !869 from JesseKLee/random_data_op

Merge pull request !794 from zhaozhenlong/fix-issues-image-gradients-complement-check

Merge pull request !856 from jiangzhiwen/dataset/skip_thread

fix DiagPart constant folding issue

fix argmin output type check

fix atan2 doc error

fix remove FusedBatchNorm and its grad