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arXiv 2407.15901cs.LGcs.AI
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利用集成LSTM层和CNN增强fNIRS数据分析中的认知工作负荷分类

Enhancing Cognitive Workload Classification Using Integrated LSTM Layers and CNNs for fNIRS Data Analysis

Institute for Intelligent Systems Research and Innovation(智能系统研究与创新研究所);Faculty of Computing and Information Technology (FoCIT)(计算与信息技术学院);School of Engineering(工程学院);Swinburne University of Technology(斯威本科技大学);Swinburne Research(斯威本研究)

Mehshan Ahmed Khan, Houshyar Asadi, Mohammad Reza Chalak Qazani, Adetokunbo Arogbonlo, Siamak Pedrammehr, Adnan Anwar, Asim Bhatti, Saeid Nahavandi, Chee Peng Lim

AI总结:

本文通过集成LSTM层和CNN,解决fNIRS数据中CNN空间特征过拟合和缺乏时间依赖性的问题,将认知工作负荷分类准确率从97.40%提升至97.92%。

摘要:

功能性近红外光谱(fNIRS)作为一种非侵入性方法,通过捕获氧合血红蛋白(HbO)和脱氧血红蛋白(HbR)浓度的变化来监测功能性大脑激活。各种机器学习分类技术已被用于区分认知状态。然而,传统的机器学习方法虽然实现简单,但在网络训练前需要复杂的预处理阶段,并且由于数据预处理不足而表现出较低的准确性。此外,先前使用fNIRS进行认知负荷评估的研究主要集中于区分两个水平的心理工作负荷。这些研究主要旨在分类低和高水平的认知负荷,或区分简单和困难任务。为了解决与传统方法相关的这些局限性,本文全面探索了长短期记忆(LSTM)层对深度学习模型中卷积神经网络(CNN)有效性的影响。这是为了解决先前研究中CNN的空间特征过拟合和缺乏时间依赖性的问题。通过集成LSTM层,模型可以捕获fNIRS数据中的时间依赖性,从而更全面地理解认知状态。主要目标是评估LSTM层的加入如何增强CNN的性能。本文的实验结果表明,将LSTM层与卷积层集成使深度学习模型的准确率从97.40%提高到97.92%。

英文摘要:

Functional near-infrared spectroscopy (fNIRS) is employed as a non-invasive method to monitor functional brain activation by capturing changes in the concentrations of oxygenated haemoglobin (HbO) and deoxygenated haemo-globin (HbR). Various machine learning classification techniques have been utilized to distinguish cognitive states. However, conventional machine learning methods, although simpler to implement, undergo a complex pre-processing phase before network training and demonstrate reduced accuracy due to inadequate data preprocessing. Additionally, previous research in cog-nitive load assessment using fNIRS has predominantly focused on differ-sizeentiating between two levels of mental workload. These studies mainly aim to classify low and high levels of cognitive load or distinguish between easy and difficult tasks. To address these limitations associated with conven-tional methods, this paper conducts a comprehensive exploration of the im-pact of Long Short-Term Memory (LSTM) layers on the effectiveness of Convolutional Neural Networks (CNNs) within deep learning models. This is to address the issues related to spatial features overfitting and lack of tem-poral dependencies in CNN in the previous studies. By integrating LSTM layers, the model can capture temporal dependencies in the fNIRS data, al-lowing for a more comprehensive understanding of cognitive states. The primary objective is to assess how incorporating LSTM layers enhances the performance of CNNs. The experimental results presented in this paper demonstrate that the integration of LSTM layers with Convolutional layers results in an increase in the accuracy of deep learning models from 97.40% to 97.92%.

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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