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。
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。
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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