The rule used for representing the learning curve effect states that the more times a task has been performed, the less time will be required on each subsequent iteration.

表示学习曲线效应的规则是做一个任务的次数越多，每次重复所需的时间越少。

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HHT has not been put forward for long time, so it contains some theoretical problems, such as envelop and mean curve fit, boundary effect, modes mix and so on.

HHT刚提出不久，其理论本身还存在不少问题，如包络线和均值曲线的拟合、边界效应和模态混叠等问题。

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The obvious time effect and end-bearing behavior of bearing disks are pointed out by means of analyses. The high bearing capacity and S-shaped Q-S curve of squeezed branch piles are highlighted.

通过分析计算，指出了支盘的承力特性具有明显的时间效应和端承性质，揭示了支盘桩高承载力和S型Q-S曲线的内涵。

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