Potential high-temperature risks exist in heat-prone components of electric moped charging devices,such as sockets,interfaces,and controllers.Traditional detection methods have limitations in terms of real-time perfor...Potential high-temperature risks exist in heat-prone components of electric moped charging devices,such as sockets,interfaces,and controllers.Traditional detection methods have limitations in terms of real-time performance and monitoring scope.To address this,a temperature detection method based on infrared image processing has been proposed:utilizing the median filtering algorithm to denoise the original infrared image,then applying an image segmentation algorithm to divide the image.展开更多
Wearable technology has revolutionized personalized healthcare and human–machine interfaces[1,2].While conventional devices,such as watches,rings,and chest straps,demonstrate utility in localized physiological monito...Wearable technology has revolutionized personalized healthcare and human–machine interfaces[1,2].While conventional devices,such as watches,rings,and chest straps,demonstrate utility in localized physiological monitoring,they exhibit inherent limitations in mechanical compliance and ergonomic adaptability.These systems fundamentally lack the capability to capture the body’s spatially distributed,multimodal biosignals(biopotential,optical,thermal,and mechanical)with precision due to their single-node measurement paradigm.展开更多
The concept of gait synergy provides novel human-machine interfaces and has been applied to the control of lower limb assistive devices,such as powered prostheses and exoskeletons.Specifically,on the basis of gait syn...The concept of gait synergy provides novel human-machine interfaces and has been applied to the control of lower limb assistive devices,such as powered prostheses and exoskeletons.Specifically,on the basis of gait synergy,the assistive device can generate/predict the appropriate reference trajectories precisely for the affected or missing parts from the motions of sound parts of the patients.Optimal modeling for gait synergy methods that involves optimal combinations of features(inputs)is required to achieve synergic trajectories that improve human–machine interaction.However,previous studies lack thorough discussions on the optimal methods for synergy modeling.In addition,feature selection(FS)that is crucial for reducing data dimensionality and improving modeling quality has often been neglected in previous studies.Here,we comprehensively investigated modeling methods and FS using 4 up-to-date neural networks:sequence-to-sequence(Seq2Seq),long short-term memory(LSTM),recurrent neural network(RNN),and gated recurrent unit(GRU).We also conducted complete FS using 3 commonly used methods:random forest,information gain,and Pearson correlation.Our findings reveal that Seq2Seq(mean absolute error:0.404°and 0.596°,respectively)outperforms LSTM,RNN,and GRU for both interlimb and intralimb synergy modeling.Furthermore,FS is proven to significantly improve Seq2Seq’s modeling performance(P<0.05).FS-Seq2Seq even outperforms methods used in existing studies.Therefore,we propose FSSeq2Seq as a 2-stage strategy for gait synergy modeling in lower limb assistive devices with the aim of achieving synergic and user-adaptive trajectories that improve human-machine interactions.展开更多
基金supported by the National Key Research and Development Project of China(No.2023YFB3709605)the National Natural Science Foundation of China(No.62073193)the National College Student Innovation Training Program(No.202310422122)。
文摘Potential high-temperature risks exist in heat-prone components of electric moped charging devices,such as sockets,interfaces,and controllers.Traditional detection methods have limitations in terms of real-time performance and monitoring scope.To address this,a temperature detection method based on infrared image processing has been proposed:utilizing the median filtering algorithm to denoise the original infrared image,then applying an image segmentation algorithm to divide the image.
基金supported by the National Natural Science Foundation of China(52125201)China Postdoctoral Science Foundation(2024M751716)+1 种基金the Postdoctoral Fellowship Program of CPSF(GZB20230328)the Shuimu Tsinghua Scholar Program.
文摘Wearable technology has revolutionized personalized healthcare and human–machine interfaces[1,2].While conventional devices,such as watches,rings,and chest straps,demonstrate utility in localized physiological monitoring,they exhibit inherent limitations in mechanical compliance and ergonomic adaptability.These systems fundamentally lack the capability to capture the body’s spatially distributed,multimodal biosignals(biopotential,optical,thermal,and mechanical)with precision due to their single-node measurement paradigm.
基金supported by the National Natural Science Foundation of China(nos.32360196,and 32160204)the Key R&D Project of Hainan Province(grant nos.ZDYF2022SHFZ302 and ZDYF2022SHFZ275)+6 种基金the Major Science and Technology Projects of Hainan Province(grant no.ZDKJ2021032)Hainan Province Clinical Medical Center(no.0202067)Science,Technology,and Innovation Commission of Shenzhen Municipality(STICproject no.SGDX20220530111005036)Basic and Applied Basic Research Fund of Guangdong Province:Regional Joint Fund Project Youth Fund(project no.2021A1515110356)Shenzhen Science and Technology Plan Project(project no.JCYJ20220818101407016)by the Project of Sanya Yazhou Bay Science and Technology City(no.SCKJJYRC-2023-27).
文摘The concept of gait synergy provides novel human-machine interfaces and has been applied to the control of lower limb assistive devices,such as powered prostheses and exoskeletons.Specifically,on the basis of gait synergy,the assistive device can generate/predict the appropriate reference trajectories precisely for the affected or missing parts from the motions of sound parts of the patients.Optimal modeling for gait synergy methods that involves optimal combinations of features(inputs)is required to achieve synergic trajectories that improve human–machine interaction.However,previous studies lack thorough discussions on the optimal methods for synergy modeling.In addition,feature selection(FS)that is crucial for reducing data dimensionality and improving modeling quality has often been neglected in previous studies.Here,we comprehensively investigated modeling methods and FS using 4 up-to-date neural networks:sequence-to-sequence(Seq2Seq),long short-term memory(LSTM),recurrent neural network(RNN),and gated recurrent unit(GRU).We also conducted complete FS using 3 commonly used methods:random forest,information gain,and Pearson correlation.Our findings reveal that Seq2Seq(mean absolute error:0.404°and 0.596°,respectively)outperforms LSTM,RNN,and GRU for both interlimb and intralimb synergy modeling.Furthermore,FS is proven to significantly improve Seq2Seq’s modeling performance(P<0.05).FS-Seq2Seq even outperforms methods used in existing studies.Therefore,we propose FSSeq2Seq as a 2-stage strategy for gait synergy modeling in lower limb assistive devices with the aim of achieving synergic and user-adaptive trajectories that improve human-machine interactions.
