Alerts can be sent using email or pager to the on-call administrator when problems reach warning and error thresholds.
当问题严重程度到达警告和错误的阈值时，能够以电子邮件或者纸质的方式向管理员发送告警信息。
Threshold error severity levels - Identify threshold error severity levels and design fault tolerance levels in service orchestration around these thresholds.
阀值错误严重级别——定义错误严重级别阈值，并在服务编排中根据这些阈值设计容错级别。
A novel adaptive distance relay approach which can adjust action thresholds according to the error is proposed.
据此提出了一种自适应距离保护方法，根据误差的大小调整动作门槛。
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