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46th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2024

作者： Tai, Pengrui Yang, Jingcheng Qi, Shaowen Li, Guanglin Fu, Yunfa Li, Yongcheng Kunming University of Science and Technology Kunming China Cas Key Laboratory of Human-Machine Intelligence-Synergy Systems SIAT-CAS China Cas Key Laboratory of Human-Machine Intelligence-Systems SIAT-CAS China

ISBN: (纸本)9798350371499

Visual Imagery (VI) can be defined as the manipulation of visual information derived from memory rather than perception. Currently, the brain responses underlying imitation and associative VI are not clear. In this study, we explore the differences from imitation to associative VI on the brain responses based on EEG signals. In this study, eight participants were instructed to observe visual cues from three predefined images or characters (tree, computer, or sphere), and then imagine the same cues. The results indicate that there is a significant difference in power intensity among electrode channels in the occipital lobe, posterior parietal lobe, and temporal lobe during the imagination phase between imitative tasks and associative tasks, as revealed by t-tests (p © 2024 IEEE.

关键词： Long short-term memory

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Single-Wavelength Laminar Optical Tomography for In Vivo Microvascular Three-Dimensional Imaging 46

Single-Wavelength Laminar Optical Tomography for In Vivo Mic...

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46th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2024

作者： Cui, Han Han, Dewei Liu, Wenquan Deng, Xinping Xin, Zhixuan Li, Guanglin Cas Key Laboratory of Human-Machine Intelligence-Synergy Systems Shenzhen Institute of Advanced Technology Shenzhen China

ISBN: (纸本)9798350371499

Laminar Optical Tomography (LOT) is a promising non-invasive technique for three-dimensional imaging of complex biological structures, combining high resolution and deep penetration. In this study, a LOT system was assembled using a 520nm continuous-wave laser, exploiting the contrast mechanism provided by the unique optical absorption coefficient of hemoglobin at this wavelength for microvascular imaging. The system utilizes raster scanning to illuminate the target tissue's surface, capturing backscattered light intensity with a multi-channel Photomultiplier Tubes. The inverse problem of light propagation within the tissue is solved to reconstruct a three-dimensional image of microvasculature. Phantom and in-vivo rat ear results demonstrate the system's ability to image micro vessels with diameters of several hundred micrometers within the tissue. The implemented LOT system, known for its simplicity and cost-effectiveness, showcases its potential for applications in microvascular physiological and pathological research, as well as clinical diagnostics. © 2024 IEEE.

关键词： Clinical research

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Spasticity assessment with muscle coactivation of elbow flexors during passive stretch in Post-stroke Hemiplegia

Spasticity assessment with muscle coactivation of elbow flex...

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45th Annual International Conference of the IEEE Engineering in Medicine and Biology Conference, EMBC 2023

作者： Wang, Hui Geng, Yanjuan Fang, Peng Li, Guanglin Cas Key Laboratory of Human-Machine Intelligence-Synergy Systems Shenzhen518055 China

ISBN: (纸本)9798350324471

the assessment of muscle properties is an essential prerequisite in the treatment of post-stroke muscle spasticity. Previous studies have shown that muscle coactivation, which reflects the simultaneous activation of agonist and antagonist muscle groups, is associated with muscle spasticity during voluntary contraction. However, current spasticity assessment approaches do not often consider muscle coactivation for passive contraction measured with surface electromyography (sEMG). The purpose here is to evaluate the validity and reliability of muscle co-activation based on sEMG for assessing spasticity of post-stroke patients. This study was conducted on 39 chronic hemiplegia post-stroke patients with varying degrees of elbow flexor spasticity. The severity of spasticity was assessed with Modified Ashworth Scale (MAS). The patients produced elbow flexion passively on affected arm. Two-channel surface sEMG recordings were acquired simultaneously for the biceps and triceps muscles. The effectiveness and reliability of the EMG-based spasticity assessment method were evaluated using Spearman's correlation analysis and intra class correlation coefficients (ICCs). The results showed that there was a statistically significant positive relationship between the level of activity and the coactivation index (R=0.710, P=0.003), while the ICCs for intra trial measures ranged between 0.928 and 0.976. Muscle coactivation is a promising tool for continuously quantifying muscle spasticity in post-stroke patients, suggesting that the EMG-based muscle coactivation index could be useful for assessing motor function. © 2023 IEEE.

关键词： Muscle

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A Prosthetic Hand System with human-Like Grasping by Combining EMG and Visual Information 30

A Prosthetic Hand System with Human-Like Grasping by Combini...

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30th International Conference on Mechatronics and machine Vision in Practice, M2VIP 2024

作者： Zheng, Yue Chen, Xinxing Tian, Lan Li, Xiangxin Zhang, Haoshi Jiang, Xugang Li, Guanglin Fu, Chenglong Shenzhen Key Laboratory of Biomimetic Robotics and Intelligent Systems Shenzhen518055 China Guangdong Provincial Key Laboratory of Human-Augmentation and Rehabilitation Robotics in Universities Southern University of Science and Technology Shenzhen518055 China Cas Key Laboratory of Human-Machine Intelligence-Synergy Systems China

ISBN: (纸本)9798350391916

This paper proposed a novel prosthetic hand system integrated with a designed hybrid control method for achieving human-like grasping. The system design has been elaborated, including the mechanism design of a humanoid prosthetic hand equipped with multimodal sensing capabilities, a multi-channel EMG collector, a sensory feedback device, and a real-time central processing unit. A hybrid control method that combines electromyogram (EMG) and visual information was proposed to recognize the control intention of the system user. Preliminary verification of grasping experiments had been conducted, which proved the effectiveness of the prosthetic hand system and the hybrid control method. The development of this system aims to enhance the control performance and perceptual interaction capabilities of prosthetic hands while addressing limitations encountered in traditional myoelectric prosthetic hands. Besides, it could serve as a validation platform for assessing the control performance of diverse algorithms applied in practical applications. © 2024 IEEE.

关键词： Sensory feedback

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Exploring the Relationship Between Imitated and Associated Mechanism on Performance of Visual Imagery Brain-Computer Interface

Exploring the Relationship Between Imitated and Associated M...

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Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC)

作者： Pengrui Tai Jingcheng Yang Shaowen Qi Guanglin Li Yunfa Fu Yongcheng Li Kunming University of Science and Technology Kunming China CAS Key Laboratory of Human-Machine Intelligence-Synergy Systems SIAT-CAS China CAS Key Laboratory of Human-Machine Intelligence-Systems SIAT-CAS China

ISBN: (数字)9798350371499

ISBN: (纸本)9798350371505

关键词： Electrodes Visualization Temporal lobe Parietal lobe Electroencephalography Brain-computer interfaces Occipital Lobe Engineering in medicine and biology Visual perception

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Function-oriented optimization design method for underactuated tendon-driven humanoid prosthetic hand

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Frontiers of Mechanical Engineering 2022年第3期17卷 75-89页

作者： Yue ZHENG Xiangxin LI Lan TIAN Guanglin LI CAS Key Laboratory of Human-Machine Intelligence-Synergy Systems Shenzhen Institutes of Advanced Technology(SIAT)Chinese Academy of Sciences(CAS)Shenzhen518055China Shenzhen College of Advanced Technology University of Chinese Academy of SciencesShenzhen518055China SIAT Branch Shenzhen Institute of Artificial Intelligence and Robotics for SocietyShenzhen518055China Guangdong-Hong Kong-Macao Joint Laboratory of Human-Machine Intelligence-Synergy Systems Shenzhen518055China

The loss of hand functions in upper limb amputees severely restricts their mobility in daily *** a humanoid prosthetic hand would be an effective way of restoring lost hand *** a prosthetic hand design,replicating the natural and dexterous grasping functions with a few actuators remains a big *** this study,a function-oriented optimization design(FOD)method is proposed for the design of a tendon-driven humanoid prosthetic *** optimization function of different functional conditions of full-phalanx contact,total contact force,and force isotropy was constructed based on the kinetostatic model of a prosthetic finger for the evaluation of grasping *** a genetic algorithm,the optimal geometric parameters of the prosthetic finger could be determined for specific functional *** results reveal that the structure of the prosthetic finger is significantly different when designed for different functional requirements and grasping target sizes.A prosthetic finger was fabricated and tested with grasping *** mean absolute percentage error between the theoretical value and the experimental result is less than 10%,demonstrating that the kinetostatic model of the prosthetic finger is effective and makes the FOD method *** study suggests that the FOD method enables the systematic evaluation of grasping performance for prosthetic hands in the design stage,which could improve the design efficiency and help prosthetic hands meet the design requirements.

关键词： function-oriented tendon driven prosthetic hand optimization humanoid underactuated

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SpikingVPR: Spiking Neural Network-Based Feature Aggregation for Visual Place Recognition 5

SpikingVPR: Spiking Neural Network-Based Feature Aggregation...

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5th International Conference on Sensing, Measurement and Data Analytics in the Era of Artificial intelligence, ICSMD 2024

作者： Wang, Gulin Ren, Ziliang Zhang, Qieshi Cheng, Jun Shenzhen Institute of Advanced Technology Chinese Academy of Sciences Cas Key Laboratory of Human-Machine Intelligence-Synergy Systems Shenzhen China School of Computer Science and Technology Dongguan University of Technology Dongguan China

ISBN: (纸本)9798331529192

Visual Place Recognition (VPR) is a crucial task in robotics and autonomous driving, where it identifies the geographic location of a query image by matching it with a reference database. VPR faces significant challenges, including appearance variations due to lighting, occlusion, weather, and seasonal changes, alongside the need for real-time processing under low computational cost and latency. To address these challenges, we introduce Spiking Neural Networks (SNN) into the VPR task, specifically focusing on the feature aggregation component. SNN, with their event-driven nature, offer advantages in computational efficiency and energy consumption, making them well-suited for energy-constrained environments such as drones. Our approach transforms the feature aggregation stage of VPR into a spiking, event-driven mechanism, which maintains high recall performance while integrating seamlessly with traditional ANN-based methods. Experimental results demonstrate that our SNN-based method effectively maintains high recall performance, validating its potential in autonomous driving and other related applications. © 2024 IEEE.

关键词： Event-Driven Mechanism Feature Aggregation Spiking Neural Network Visual place recognition (VPR)

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Heuristic Semantic Segmentation Using the Weights of Local Voxel Structure

Heuristic Semantic Segmentation Using the Weights of Local V...

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International Conference on Guidance, Navigation and Control, ICGNC 2022

作者： Zhang, Ziheng Wang, Lu Zhang, Qieshi Cheng, Jun Northeast University of China Shenyang China CAS Key Laboratory of Human-Machine Intelligence-Synergy Systems Shenzhen Institute of Advanced Technology Chinese Academy of Sciences Shenzhen China

ISBN: (纸本)9789811966125

In recent years, with the rise of autonomous driving, more and more researchers focus on the field of point cloud semantic segmentation. They have increased the overall mIoU to over 70% and the speed to over 20 fps. However, in the field of 3D semantic segmentation of outdoor point clouds, the long-tail problem is a widespread factor and greatly influences the results. In this paper, we propose a compound loss function based on local voxel structure, which re-weights the classes with uneven distribution to solve this problem. In the results, we achieve 1.7% mIOU improvement over the baseline method while maintaining its inference speed. More importantly, we provide an idea to optimize point-based semantic segmentation by analyzing voxel structure. From this point of view, the voxel method and the point method are complementary to each other. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Semantic Segmentation

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A Review of State-of-the-arts Sensing Techniques for the Ultra-early Screening of Cerebral Palsy

A Review of State-of-the-arts Sensing Techniques for the Ult...

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2023 IEEE International Conference on Real-Time Computing and Robotics, RCAR 2023

作者： Zhuang, Yunji Zhou, Hao Zhang, Huiping Chen, Yanni Wang, Lin Chinese Academy of Sciences Cas Key Laboratory of Human-Machine Intelligence-Synergy Systems Shenzhen Institutes of Advanced Technology Shenzhen518055 China Guangdong-Hong Kong-Macau Joint Laboratory of Human-Machine Intelligence-Synergy Systems Shenzhen518055 China Xi'an Jiaotong University Children's Hospital Xi'an710002 China

ISBN: (纸本)9798350327182

Cerebral palsy (CP) is characterized by neuromotor disorders. It remains a huge challenge for ultra-early screening of CP. So far, the diagnosis of CP is mainly based on a combination of neuromotor assessment methods, magnetic resonance imaging (MRI) and clinical history. However, subjective errors are highly likely to be introduced in the process of CP screening due to disparities in clinicians' professional backgrounds, working abilities and academic levels. Cutting-edge sensing techniques have been unveiled in the field of ultra-early CP prediction which provides objective diagnosis with quantified output information by obtaining motion capture, classification, and recognition. It is necessary to contrast the strengths, weaknesses, and potential of these techniques and how to apply them in the ultra-early screening of CP. This study compares and analyzes the latest and advanced sensing methods and discusses their future applications in infantile CP screening. The work could provide technical suggestions and clinical guidance for early intervention in the field of ultra-early CP screening later on. © 2023 IEEE.

关键词： Diseases

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Design and Simulation of A Novel Electromagnetic Radial Shock Wave Therapy 17

Design and Simulation of A Novel Electromagnetic Radial Shoc...

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17th International Convention on Rehabilitation Engineering and Assistive Technology, i-CREATe 2024

作者： Zhou, Xiaomeng Cui, Fengxi Yang, Zijian Zhao, Chunlei Li, Guanglin Bao, Shi-Chun Cas Key Laboratory of Human-Machine Intelligence-Synergy Systems Shenzhen518055 China Shenzhen Dongdixin Technology Co. Ltd Shenzhen518057 China National Innovation Center for Advanced Medical Devices Shenzhen518126 China

ISBN: (纸本)9798350355154

Extracorporeal shock wave therapy is a non-invasive technique, which has been widely used in the clinical treatment of various musculoskeletal diseases such as frozen shoulder and muscle spasms. Conventional pneumatic radial shock wave therapy devices, as the mainstream products today, have shortcomings such as complex structure, high noise, and high requirements for airtightness. Alternatively, electromagnetic radial extracorporeal shock waves can effectively overcome the deficiencies of existing pneumatic technologies by introducing novel system designs. This article introduced the principles of electromagnetic launch technology, demonstrated the feasibility of electromagnetic radial extracorporeal shock wave therapy device by self-designed hardware and control strategy, and investigated the transmission process of shock waves from its generation to its effects on the human body. The feasibility and effectiveness of the design scheme were verified through finite element simulation and prototype manufacturing. © 2024 IEEE.

关键词： Shock waves

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