Describe the current behavior / 问题描述 (Mandatory / 必填)
8p训练实测精度97.53%，readme精度99.28%，精度下降1.75%，精度不达标

Environment / 环境信息 (Mandatory / 必填)
Hardware Environment(Ascend/GPU/CPU) / 硬件环境:
/device ascend
Software Environment / 软件环境 (Mandatory / 必填):
-- CANN 版本: (CANN 5.0.4 B065)
--Python 版本:Python 3.7.5
--操作系统版本 (e.g., Ubuntu 18.04):Ubuntu 18.04
--mindspore版本：1.6.1

Steps to reproduce the issue / 重现步骤 (Mandatory / 必填)
按照实际情况修改配置文件
启动8p训练，启动命令：bash run_distribute_train.sh
训练完成后进行精度评估，启动命令：bash run_eval_standalone_Ascend.sh 0 /home/tf/sphereface_r1.6/scripts/device0/0-20_221.ckpt

Describe the expected behavior / 预期结果 (Mandatory / 必填)
8p训练功能正常，精度下降不超过0.5%

Related log / screenshot / 日志 / 截图 (Mandatory / 必填)

Please check the above information for the configurations
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10574
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load model %s success /home/tf/sphereface_r1.6/scripts/device0/0-20_221.ckpt
now the idx is %d 0
now the idx is %d 1
now the idx is %d 2
now the idx is %d 3
now the idx is %d 4
now the idx is %d 5
now the idx is %d 6
now the idx is %d 7
now the idx is %d 8
now the idx is %d 9
LFWACC=0.9753 std=0.0090 thd=0.3000