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The research of pulse wave signal denosing based on EMD and ICA

The research of pulse wave signal denosing based on EMD and ...

The Third International Joint Conference on Computational Science and Optimization(第三届计算科学与优化国际大会 CSO 2010)

作者： Yingying Zheng Yongliang Zhang Yanli Liu Key Laboratory of Biomimetic Sensing and Advanced Robot Technology Institute of Intelligent Machine Anhui institute of Architecture & Industry Hefei 230601 China

Pulse wave is easily contaminated by noise when being sampled and processed. In order to extract and analyze the useful information involved, the paper presents a novel denoising algorithm based on empirical mode decomposition (EMD) and independent component analysis (ICA).First, the signal is decomposed by EMD ,then a series of intrinsic mode functions (IMFs) and the remainder can be obtained. Second, ICA will be performed to separate independent components from IMFs. At last, these independent components will be used to reconstruct the pulse wave signal. By using the method, we are able to separate noise and estimate desired source signals from pulse wave signal. Experimental results substantiate the strong potential of the proposed method for pulse wave signal noise separation.

关键词： Empirical mode decomposition independent component analysis pulse wave signal

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The plant modeling research based on improved 3D L-system and quaternion

The plant modeling research based on improved 3D L-system an...

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International Conference on Information and Automation (ICIA)

作者： Ke Guan Key Laboratory of Biomimetic Sensing and Advanced Robot Technology of Anhui Province Institute of Intelligent machines Chinese Academy and Sciences Hefei China

This paper describes the plant modeling research based on improved 3D L-system and quaternion. It first introduces the original 3D L-system and how to implement it, then brings forward the improved modeling method of 3D L-system by specifying the growth vector and azimuth vector and applies the quaternion based computer algorithm in it, in the end generates some 3D plant models of sympodia and uniaxiality based on the improved method and algorithm.

关键词： Three dimensional displays Solid modeling Azimuth Computational modeling Mathematical model Quaternions Axles

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Design of lower extremity rehabilitation robots with magnetorheological dampers and wire-driven system

Design of lower extremity rehabilitation robots with magneto...

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2018 IEEE International Conference on Information and Automation, ICIA 2018

作者： Xu, Jiajun Xu, Linsen Li, Youfu Liu, Jinfu Li, Xiaohu Lu, Linlin University of Science and Technology of China No. 96 Jinzhai Road Hefei Anhui Province China City University of Hong Tat Chee Avenue Kowloon Hong Kong Hefei Institutes of Physical Science CAS Changzhou China Key Laboratory of Biomimetic Sensing and Advanced Robot Technology Anhui Province China

ISBN: (纸本)9781538680698

Lower extremity rehabilitation robots play significantly important role in rehabilitation medicine, which aims to bring back the capabilities of patients' lower limbs because of illness, injury and disease. However, controllability, energy consumption and control precision of the robot motion remain difficult to solve out. In many cases, electric motors are required to have high output torque to move the entire machine legs along with human legs, while extravagant motor torque may lead to excessive bending, fracture or other secondary damages. And the motors would generate the braking torque to prevent this at the cost of consuming large armature current. Controllable braking torque also counts while patients' active anti-resistance training. Smart materials have provided inspiration and magneto-rheological (MR) fluids vary in rheological behavior with responding to applied magnetic field. Based on the characteristics, magnetorheological dampers (MR dampers) were developed and have realized variable damping resistance according to different magnetic field. Besides, wire-driven system is another guarantee of safety and controllability due to its flexible structure and compliant control. So, with combination of MR dampers and wire-driven system, the lower extremity rehabilitation robot would perform better, more efficiently and more safely. Actually, such robot can hardly be seen in previous related research or publication. In this paper, three kinds of rehabilitation robots with MR dampers and wire-driven system are introduced. They are standing/walking rehabilitation robot with cylindrical dampers, standing/walking rehabilitation robot with discal dampers and sitting/lying rehabilitation robot with discal dampers. Their advantages and drawbacks are also explained. © 2018 IEEE.

关键词： Energy utilization

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An Experimental Characterization of the BIT Astronaut robot

An Experimental Characterization of the BIT Astronaut Robot

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作者： Tao, Zheng Marco, Ceccarelli Hui, Li Yang, Mo Key Laboratory of Biomimetic Robots and Systems Beijing Advanced Innovation Center for Intelligent Robots and Systems Beijing Institute of Technology Beijing100081 China Lab Robot Mechatronics University of Rome Tor Vergata Rome Italy

In this paper a prototype of BIT (Beijing Institute of technology) astronaut robot with three leg-arm limbs is presented with performance characteristics from a demo test. An experimental demo for basic operation modes is presented simulating the BIT astronaut robot moving outside an orbital station with a lab testbed set up for experimental activity of robot characterization. Results of the demo tests are used to characterize the feasibility of the robot design and its operation also with experiences at ground gravity. © 2020, Springer Nature Switzerland AG.

关键词： robots

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The study and improvement of memory management based on SOS

The study and improvement of memory management based on SOS

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2008 IEEE International Conference on robotics and biomimetics, ROBIO 2008

作者： Wu, Fuqing Meng, Max Q.-H. Wu, Lingfei Zhang, Zhuancheng Chen, Xijun Institute of Intelligent Machines Chinese Academy of Sciences Hefei Anhui Province China Department of Automation University of Science and Technology of China Hefei Anhui Province China Department of Electronic Engineering Chinese University of Hong Kong Sha tian Hong Kong Key Laboratory of Biomimetic Sensing and Advanced Robot Technology Anhui Province China

ISBN: (纸本)9781424426799

the memory management of the embedded operating system has its unique traits. And so SOS operating system should have its own suitable methods for the memory management because of its small memory and resource constraint. This paper analyses the memory management of SOS operating system, and proposes a new data structure with the combination of memory management methods about μ C / OSII, then deeply probes into the memory allocation and recovery mechanisms, which provides an effective solution for memory management of SOS operating system. © 2008 IEEE.

关键词： Data structures

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Design of WSN node based on CC2431 applicable to lunar surface environment

Design of WSN node based on CC2431 applicable to lunar surfa...

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2008 IEEE International Conference on robotics and biomimetics, ROBIO 2008

作者： Zhang, Zhuancheng Meng, Max Q.-H. Wu, Fuqing Chen, Xijun Institute of Intelligent Machines Chinese Academy of Sciences Hefei Anhui Province China Department of Automation University of Science and Technology of China Hefei Anhui Province China Department of Electronic Engineering Chinese University of Hong Kong Shatian Hong Kong Key Laboratory of Biomimetic Sensing and Advanced Robot Technology Anhui Province China

ISBN: (纸本)9781424426799

Firstly, the paper introduces the Wireless Sensor Networks (WSN) simply. It analyses the influence of lunar surface environment on the nodes of WSN and gives corresponding solutions. According to the characteristics of WSN and design requirements of the sensor node, we design a kind of sensor nodes which based on CC2431. Then the processor module, wireless communications module, location engine, power management module and temperature control module are described in detail. Finally, we conduct the localization experiment of blind nodes and robot navigation experiment. © 2008 IEEE.

关键词： Sensor nodes

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Research on Contrast Calculation Method for Color Image 18th

Research on Contrast Calculation Method for Color Image

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18th Chinese Conference on Image and Graphics technology and Application Conference, IGTA 2023

作者： Qian, Jing Kong, Bin Yang, Jing Wang, Can Hefei Institutes of Physical Science Chinese Academy of Sciences Hefei230031 China University of Science and Technology of China Hefei230026 China Peng Cheng Laboratory Shenzhen518053 China Anhui Key Laboratory of Biomimetic Sensing and Advanced Robot Technology Hefei230031 China School of Artificial Intelligence and Big Data Hefei University Hefei230031 China

ISBN: (纸本)9789819975488

Contrast is one of the commonly used indicators for evaluating image quality and is related to color information. However, the traditional contrast calculation method only reflects the clarity of the image by counting the distribution probability of the gray difference between adjacent pixels in the region, which lacks consideration of the chrominance information. We propose a contrast calculation method considering the perceptual color difference in color images. First, we obtain each pixel’s hue and saturation information from the HSV color space. And the luminance information of each pixel is obtained while retaining the color contrast information of the original image. Then, the contrast of a color image is obtained by counting the number of adjacent pixels whose color difference exceeds the threshold and calculating the sum of color differences. Experiment results show that our method is less affected by the uniform color patches than other methods. It can effectively reflect the relationship between the contrast values of different images and reduce the information loss of color contrast. In addition, for different color images, the magnitude of the contrast value obtained by our method is consistent with the trend of human visual judgment. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Image quality

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SPORTS BIOMECHANICAL INFORMATION ACQUISITION AND EVALUATION FOR KAYAKING EVENTS

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International Journal of Information Acquisition 2009年第3期6卷 213-223页

作者： ZUCHANG MA JINGMIN ZHANG YINING SUN TAO MEI Key laboratory of Biomimetic Sensing and Advanced Robot Technology Institute of Intelligent Machines Chinese Academy of Sciences Hefei 230031 China Department of Precision Machinery and Instrumentation University of Science and Technology of China Hefei 230026 China

Intensive understanding of sports biomechanical principles is an essential issue for sprint kayaking. In recent years, the authors have studied the acquisition of biomechanical information and the evaluation of competitive ability on sprint kayaking. In this study, first, an oar force sensor was developed to detect the stroke forces applied by paddler. The sensor was attached to a paddle with minimum mechanical involvement, hence the mechanical properties of the paddle was not changed. Second, an on-water instrument of biomechanical information acquisition was developed to detect stroke force, stroke frequency, stroke power, kayak speed, and acceleration synchronously. Third, 12 evaluation factors for kayaking ability were proposed based on the factor analysis. The 12 factors include (1) the stroke rate; (2) the speed fluctuation; (3 and 4) the hull pose (L/R); (5 and 6) the stroke force (L/R); (7 and 8) the endurance (L/R); (9 and 10) the stroke technique (L/R); (11 and 12) and the stroke rhythm (L/R). Finally, the stroke rate and the forward stoke technique was analyzed briefly.

关键词： Kayaking oar force stroke rate

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Predicting Arterial Stiffness from radial Pulse Waveform using support vector machines

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Procedia Engineering 2010年 7卷 458-462页

作者： Yingying Zheng Yongliang Zhang Zuchang Ma Yining Sun Key Laboratory of Biomimetic Sensing and Advanced Robot Technology Institute of Intelligent machines Chinese Academy of Sciences Hefei 230031 China Department of Automation University of Science and Technology of China Hefei 230027 China

Cardiovascular disease (CVD) is a larger cause of mortality in the developed country; hence, the early detection of its onset is vital for effective prevention. Arterial stiffness as measured by radial augmentation index (AIx) has been shown to be an independent predictor of CVD; however, the measurement of AIx is complex and not easily obtained precisely. A new approach based on the implementation of support vector machine (SVM) is presented for classification of radial pulse waveform. The radial pulse signals was decomposed into time-frequency representations using discrete wavelet transform (DWT) and wavelet scale-energy were calculated to represent the signals. The purpose is to predict an optimum classification scheme. The result demonstrated that the wavelet scale-energy are the features which well represent the radial Pulse Waveforms and the SVM trained on these features achieved high classification accuracies.

关键词： Arterial stiffness Support vector machine Discrete wavelet transform Wavelet packet energy entropy

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Performance of optimized TVOCs sensor

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Procedia Engineering 2010年 7卷 392-398页

作者： Fumin Peng Tao Luoa Yupeng Yuan Lingguang Qiu Laboratory of Advanced Porous Materials and College of Chemistry and Chemical Engineering Anhui University Anhui Hefei 230039 China Key Laboratory of Biomimetic Sensing and Advanced Robot Technology Hefei Institute of Intelligent Machines Chinese Academy of Sciences Anhui Hefei 230031 China

In this paper, an improved TVOCs (total volatile organic compounds) sensor construction was studied. Base on this new construction, the optimized flow rate, the responding character and the linear range of detector were studied. The effect of different electrode positions on the signal intensity was tested at different voltages. Compared with traditional PID — axial PID3, the construction of this perpendicular PID could make the sensitivity loss decreased by a factor of 40%. Especially, a newly adopted automatic cleaning technique was tested, which could decrease the drift greatly and make the signal of the detector almost unchanged after two weeks of continuous detection. Due to this new construction, the response time was decreased and the accuracy consequently was improved. When coupled with automatic cleaning technique, labor intensive daily calibration and frequent lamp cleaning were eliminated. The improvements in this new design made the detector more compatible with field uses.

关键词： Photoionization detector Direct-reading and automated cleaning Total volatile organic compounds

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