ISSN 1003-8035 CN 11-2852/P

    基于动态串联PSO-BiLSTM的滑坡变形速率预测方法研究

    Research on landslide deformation rate prediction method based on dynamic serial PSO-BiLSTM

    • 摘要: 针对现有突发型滑坡变形速率预测方法存在诸如精度不足、计算效率低等问题,提出一种基于动态串联PSO-BiLSTM的滑坡变形速率预测方法。首先,采用动态滑窗方式截取滑坡变形速率,并通过集合经验模态分解(EEMD)对截取的变形速率序列进行分解,得到趋势项及周期项;其次,分别通过多项式拟合和周期项PSO-BiLSTM网络得到趋势项和周期项的变形速率预测序列;再次,经过一系列循环得到残差变形速率序列后,结合趋势项及周期项变形速率预测序列,建立总PSO-BiLSTM预测网络,得到总预测变形速率;最后,以四川省某滑坡监测为例对方法进行了验证,结果表明:基于动态串联PSO-BiLSTM算法的MAE、MAPE、RMSE、R2分别为0.28、5.41%、0.57、0.98,计算时间为380.22s,在具有较高的精度的同时保证了计算效率。

       

      Abstract: This paper proposed a method for predicting landslide deformation rates using a dynamic serial PSO-BiLSTM approach, aiming to overcome the limitation such as insufficient accuracy and low computational efficiency found in existing methods. Initially, the deformation rate of landslides is captured through a dynamic sliding window technique, and the resulting sequence is decomposed using Ensemble Empirical Mode Decomposition (EEMD) to extract trend and periodic components. Subsequently, the deformation rate prediction sequences of trend and periodic components were obtained through polynomial fitting and a periodic component of PSO-BiLSTM network, respectively. After several cycles that produce residual deformation rate sequences, these are integrated with the initial prediction sequences to establish a comprehensive PSO-BiLSTM prediction network that yields the total predicted deformation rate. The method was validated with a landslide monitoring case in Sichuan Province, achieving a MAE of 0.28, a MAPE of 5.41%, an RMSE of 0.57, and an R2 of 0.98, with a computation time of 380.22 seconds, thus ensuring high accuracy and computational efficiency.

       

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