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arXiv 2009.07943cs.LGstat.ML
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用于预测时间序列数据趋势的深度神经网络分析

An analysis of deep neural networks for predicting trends in time series data

University of Cape Town(开普敦大学);Centre for Artificial Intelligence Research(人工智能研究中心)

Kouame Hermann Kouassi, Deshendran Moodley

摘要:

最近,提出了一种混合深度神经网络(DNN)算法TreNet,用于预测时间序列数据的趋势。虽然TreNet在趋势预测方面表现出优于其他DNN和传统ML方法的性能,但所使用的验证方法没有考虑时间序列数据集的连续性,也没有处理模型更新。在这项研究中,我们使用向前走验证方法在相同的数据集上复制了TreNet实验,并在多个独立运行中测试了我们的最佳模型,以评估模型稳定性。我们比较了混合TreNet算法在四个数据集上的性能,与采用点数据的普通DNN算法以及传统ML算法。我们发现,一般来说,TreNet仍然比vanilla DNN模型表现更好,但并不是在原始TreNet研究中报告的所有数据集上。本研究强调了使用适当的验证方法和评估模型稳定性的重要性,以评估和开发机器学习模型,用于时间序列数据的趋势预测。

英文摘要:

Recently, a hybrid Deep Neural Network (DNN) algorithm, TreNet was proposed for predicting trends in time series data. While TreNet was shown to have superior performance for trend prediction to other DNN and traditional ML approaches, the validation method used did not take into account the sequential nature of time series data sets and did not deal with model update. In this research we replicated the TreNet experiments on the same data sets using a walk-forward validation method and tested our optimal model over multiple independent runs to evaluate model stability. We compared the performance of the hybrid TreNet algorithm, on four data sets to vanilla DNN algorithms that take in point data, and also to traditional ML algorithms. We found that in general TreNet still performs better than the vanilla DNN models, but not on all data sets as reported in the original TreNet study. This study highlights the importance of using an appropriate validation method and evaluating model stability for evaluating and developing machine learning models for trend prediction in time series data.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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