From: @yangzhenzhang
Reviewed-by: @xiaoda_zh,@cristoval
Signed-off-by:

From: @jonwe
Reviewed-by: @robingrosman,@robingrosman,@tom__chen
Signed-off-by: @tom__chen

From: @bai-yangfan
Reviewed-by: @sanjaychan,@kingxian
Signed-off-by: @sanjaychan

From: @wanyiming
Reviewed-by: 
Signed-off-by:

From: @luoyang42
Reviewed-by: @nsyca,@pandoublefeng,@jonyguo
Signed-off-by: @jonyguo

From: @liu_xiao_93
Reviewed-by: @liangchenghui
Signed-off-by: @liangchenghui

From: @yuan_shen_zhou
Reviewed-by: @liangchenghui
Signed-off-by: @liangchenghui

From: @shallydeng
Reviewed-by: @zichun_ye,@sunnybeike
Signed-off-by: @sunnybeike

From: @yuan_shen_zhou
Reviewed-by: @liangchenghui
Signed-off-by:

From: @wilfchen
Reviewed-by: @limingqi107,@cristoval
Signed-off-by: @cristoval

From: @jkl_lee
Reviewed-by: @mikef,@nsyca
Signed-off-by: @nsyca

fix test err

fix ci round 1

fix ci round 2

add col_order to batch_node

minor fix

From: @tiancixiao
Reviewed-by: 
Signed-off-by:

Merge pull request !8248 from EricZ/helper_dep_removal

Merge pull request !8106 from kisnwang/add-cpu-adam-delta

Merge pull request !8138 from huangbingjian/fix_shape

Merge pull request !8230 from yangzhenzhang/add-repeat-element-op

Merge pull request !8270 from ZengZitao/expand_fused_adam

Merge pull request !8280 from changzherui/add_export_grad_example

Merge pull request !8194 from nsyca/opt3

Merge pull request !8135 from luoyang/c-api-pyfunc

Merge pull request !8016 from Xiaoda/21-approximate-algo-in-searching-strategy

Merge pull request !8253 from 吴书全/deepfm1105

Merge pull request !8244 from DeshiChen/1104_eliminate_redundant_parameter