In recent years,wearable devices-based Human Activity Recognition(HAR)models have received significant attention.Previously developed HAR models use hand-crafted features to recognize human activities,leading to the e...In recent years,wearable devices-based Human Activity Recognition(HAR)models have received significant attention.Previously developed HAR models use hand-crafted features to recognize human activities,leading to the extraction of basic features.The images captured by wearable sensors contain advanced features,allowing them to be analyzed by deep learning algorithms to enhance the detection and recognition of human actions.Poor lighting and limited sensor capabilities can impact data quality,making the recognition of human actions a challenging task.The unimodal-based HAR approaches are not suitable in a real-time environment.Therefore,an updated HAR model is developed using multiple types of data and an advanced deep-learning approach.Firstly,the required signals and sensor data are accumulated from the standard databases.From these signals,the wave features are retrieved.Then the extracted wave features and sensor data are given as the input to recognize the human activity.An Adaptive Hybrid Deep Attentive Network(AHDAN)is developed by incorporating a“1D Convolutional Neural Network(1DCNN)”with a“Gated Recurrent Unit(GRU)”for the human activity recognition process.Additionally,the Enhanced Archerfish Hunting Optimizer(EAHO)is suggested to fine-tune the network parameters for enhancing the recognition process.An experimental evaluation is performed on various deep learning networks and heuristic algorithms to confirm the effectiveness of the proposed HAR model.The EAHO-based HAR model outperforms traditional deep learning networks with an accuracy of 95.36,95.25 for recall,95.48 for specificity,and 95.47 for precision,respectively.The result proved that the developed model is effective in recognizing human action by taking less time.Additionally,it reduces the computation complexity and overfitting issue through using an optimization approach.展开更多
近年来,入侵检测技术在网络安全中扮演着越来越重要的角色。目前的入侵检测模型所用的方法大部分是基于传统机器学习的浅层方法。浅层机器学习方法不能有效发掘数据特征,在入侵检测中存在一定的局限性。为此,论文提出了一种深度学习模型...近年来,入侵检测技术在网络安全中扮演着越来越重要的角色。目前的入侵检测模型所用的方法大部分是基于传统机器学习的浅层方法。浅层机器学习方法不能有效发掘数据特征,在入侵检测中存在一定的局限性。为此,论文提出了一种深度学习模型,该模型结合了多头注意力(multiHead attention)和双向门循环单元(BiGRU)。模型使用多头注意力和双向门循环单元从空间和时间上处理网络攻击流量,有效缓解模型复杂性,同时增加模型表现力。此外,使用最大池化方法(maxpooling)来平衡训练速度和性能,不但可以提取序列的边缘特征,还能帮助扩大感受野,由于数据不平衡会影响模型性能表现,因此使用随机过采样(Random Over Sampling)方法来处理数据不平衡的问题。实验基于UNSW-NB15数据集和CIC-IDS2017数据集,并使用准确率(Accuracy)、精确率(Precision)、召回率(Recall)和f1分数作为评估指标。实验结果表明,模型性能优秀。展开更多
文摘In recent years,wearable devices-based Human Activity Recognition(HAR)models have received significant attention.Previously developed HAR models use hand-crafted features to recognize human activities,leading to the extraction of basic features.The images captured by wearable sensors contain advanced features,allowing them to be analyzed by deep learning algorithms to enhance the detection and recognition of human actions.Poor lighting and limited sensor capabilities can impact data quality,making the recognition of human actions a challenging task.The unimodal-based HAR approaches are not suitable in a real-time environment.Therefore,an updated HAR model is developed using multiple types of data and an advanced deep-learning approach.Firstly,the required signals and sensor data are accumulated from the standard databases.From these signals,the wave features are retrieved.Then the extracted wave features and sensor data are given as the input to recognize the human activity.An Adaptive Hybrid Deep Attentive Network(AHDAN)is developed by incorporating a“1D Convolutional Neural Network(1DCNN)”with a“Gated Recurrent Unit(GRU)”for the human activity recognition process.Additionally,the Enhanced Archerfish Hunting Optimizer(EAHO)is suggested to fine-tune the network parameters for enhancing the recognition process.An experimental evaluation is performed on various deep learning networks and heuristic algorithms to confirm the effectiveness of the proposed HAR model.The EAHO-based HAR model outperforms traditional deep learning networks with an accuracy of 95.36,95.25 for recall,95.48 for specificity,and 95.47 for precision,respectively.The result proved that the developed model is effective in recognizing human action by taking less time.Additionally,it reduces the computation complexity and overfitting issue through using an optimization approach.
文摘近年来,入侵检测技术在网络安全中扮演着越来越重要的角色。目前的入侵检测模型所用的方法大部分是基于传统机器学习的浅层方法。浅层机器学习方法不能有效发掘数据特征,在入侵检测中存在一定的局限性。为此,论文提出了一种深度学习模型,该模型结合了多头注意力(multiHead attention)和双向门循环单元(BiGRU)。模型使用多头注意力和双向门循环单元从空间和时间上处理网络攻击流量,有效缓解模型复杂性,同时增加模型表现力。此外,使用最大池化方法(maxpooling)来平衡训练速度和性能,不但可以提取序列的边缘特征,还能帮助扩大感受野,由于数据不平衡会影响模型性能表现,因此使用随机过采样(Random Over Sampling)方法来处理数据不平衡的问题。实验基于UNSW-NB15数据集和CIC-IDS2017数据集,并使用准确率(Accuracy)、精确率(Precision)、召回率(Recall)和f1分数作为评估指标。实验结果表明,模型性能优秀。
