SLA内容可以非常宽泛，也可以非常的详细，并且通常包括服务提供商和客户在出现故障时应当采取的步骤。
An SLA can be either very general or extremely detailed and generally includes the steps that should be taken by the service provider and the client in the event of failure.
由于进动周期的上下限之比通常大于2，因此该方法的计算量比自相关法增大的倍数小于1.4；同时它对先验信息的要求非常宽松。
Usually the ratio of the upper bound to the lower bound is larger than 2, resulting in the computational burden of the proposed method less than 1.4 times of that of the autocorrelation method.
网格安全是另一个问题，因为控制成员节点通常是非常宽松的。
Security is another issue with grids, because the controls on member nodes are usually very loose.
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