Shell companies have a systematic approach to health, safety, security and environmental management in order to achieve continuous performance improvement.
壳牌对健康、安全、保安与环保采取系统的管理措施，以求不断提高这方面的工作实绩。
The plant has a continuous performance, however it is still necessary to improve main equipment and technology level.
该工艺装置已实现连续化运转，但关键设备仍须改造，工艺水平有待进一步提高。
Attention deficit hyperactivity disorder; Child; EEG biofeedback training; Integrated visual and auditory continuous performance test.
注意缺陷多动障碍；儿童；脑电生物反馈；视听整合连续执行测试。
Methods: ERP elicited by the continuous performance test were recorded before and under methylphenidate treatment in 28 ADHD children and their behavioral performance were collected simultaneously.
方法：记录28名ADHD患儿执行持续性操作测试的ERP和行为学结果，未服哌甲酯及服哌甲酯后2小时分别检测。
Methods: ERP elicited by the continuous performance test were recorded before and under methylphenidate treatment in 28 ADHD children and their behavioral performance were collected simultaneously.
方法：记录28名ADHD患儿执行持续性操作测试的ERP和行为学结果，未服哌甲酯及服哌甲酯后2小时分别检测。
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