Step 4: Estimating the Duration of Each of the activities.

第四步：估量每个计划活动项目所需要的时间。

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Using this model and the Recursive Least Square (RLS) method, the model parameters and then the mass to be weighed can he identified from the step response of very short duration.

借助这一模型和递推最小二乘法(RLS)，可以由极短的称重阶跃响应估计出模型参数和被称质量。

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This may be ensured by repeating each phase step for a period extending the mean duration of the cardiac cycle and causing a corresponding extension in the acquisition time.

为延伸平均心脏周期时间的阶段而重复的每一个相位步骤使得这些得到保证，而且引起相应的数据获得时间的延长。

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As a first step, it has acknowledged that the optimism bias causes individuals to underestimate the cost and duration of projects.

CNN: Why we fool ourselves into optimism