arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2005.03948cs.CV
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用于使用可穿戴传感器的人类活动识别的具有较小滤波器的逐层训练卷积神经网络

Layer-wise training convolutional neural networks with smaller filters for human activity recognition using wearable sensors

Nanjing Normal University(南京师范大学);Nanjing University of Information Science and Technology(南京信息工程大学)

Yin Tang, Qi Teng, Lei Zhang, Fuhong Min, Jun He

摘要:

最近,卷积神经网络(CNN)已经在各种人类活动识别(HAR)数据集上设置了最新的最新技术水平。然而,深度CNN通常需要更多的计算资源,这限制了其在嵌入式HAR中的应用。虽然已经提出了许多成功的方法来减少CNN的内存和FLOPs,但它们通常涉及为视觉任务设计的特殊网络架构,由于显着的差异,这些网络架构不适用于具有时间序列传感器信号的深度HAR任务。因此,有必要开发轻量级的深度模型来执行HAR。由于滤波器是构建CNN的基本单元,因此重新设计较小的滤波器是否适用于深度HAR值得进一步研究。在本文中,受此想法的启发,我们提出了一个轻量级的CNN使用乐高过滤器的HAR。一组低维滤波器被用作乐高积木来堆叠常规滤波器,它不依赖于任何特殊的网络结构。采用局部损失函数对模型进行训练。据我们所知,这是第一篇论文,提出了轻量级的CNN的HAR在无处不在和可穿戴计算领域。在五个公共HAR数据集,UCI-HAR数据集,OPPORTUNITY数据集,UNIMIB-SHAR数据集,PAMAP 2数据集和WISDM数据集上的实验结果表明,我们的新型Lego CNN具有局部损失,可以大大降低存储和计算成本比CNN,同时实现更高的精度。也就是说,所提出的模型更小,更快,更准确。最后,我们评估了Android智能手机上的实际性能。

英文摘要:

Recently, convolutional neural networks (CNNs) have set latest state-of-the-art on various human activity recognition (HAR) datasets. However, deep CNNs often require more computing resources, which limits their applications in embedded HAR. Although many successful methods have been proposed to reduce memory and FLOPs of CNNs, they often involve special network architectures designed for visual tasks, which are not suitable for deep HAR tasks with time series sensor signals, due to remarkable discrepancy. Therefore, it is necessary to develop lightweight deep models to perform HAR. As filter is the basic unit in constructing CNNs, it deserves further research whether re-designing smaller filters is applicable for deep HAR. In the paper, inspired by the idea, we proposed a lightweight CNN using Lego filters for HAR. A set of lower-dimensional filters is used as Lego bricks to be stacked for conventional filters, which does not rely on any special network structure. The local loss function is used to train model. To our knowledge, this is the first paper that proposes lightweight CNN for HAR in ubiquitous and wearable computing arena. The experiment results on five public HAR datasets, UCI-HAR dataset, OPPORTUNITY dataset, UNIMIB-SHAR dataset, PAMAP2 dataset, and WISDM dataset collected from either smartphones or multiple sensor nodes, indicate that our novel Lego CNN with local loss can greatly reduce memory and computation cost over CNN, while achieving higher accuracy. That is to say, the proposed model is smaller, faster and more accurate. Finally, we evaluate the actual performance on an Android smartphone.

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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