The generation and the detection method of the trapezoid error are presented in the paper.

介绍了梯形误差的产生，以及梯形误差的检测方法。

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A new method of calculating soil pressure diagram for multi-layered soil excavation with finite surcharge is presented and the results are compared with those of the trapezoid soil pressure diagram.

本文对于有限地面荷载作用下的多层土基坑提出了合理的土压力计算方法，并与梯形土压力分布模式进行了对比。

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First, we introduce the trapezoid drop method based on cumulative error, and give a study way of adaptation.

我们首先简单介绍基于累积误差的梯形下降法，在此基础上，给出了一种自适应学习速率的调整方案。

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