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Application of Forearm FMG signals in Closed Loop Modality-matched Sensory Feedback Stimulation

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Journal of Bionic Engineering 2020年第5期17卷 899-908页

作者： Jing Wei tan Yimesker Yihun Department of Mechanical Engineering Wichita State UniversityWichitaKansas 67260USA

This study is aimed at exploring a technology that can use the human physiological information,such as Force Myography(FMG)signals to provide sensory feedback to prosthetic hand *** is based on the principle that with the intent to move the prosthetic hand,the existing limbs in the arm recruit specific group of *** muscles react with a change in the cross-sectional area;piezoelectric sensors placed on these muscles will generate a voltage(FMG signals),in response to the change in muscle *** correlation between the amplitude of the FMG signals and intensity of pressure on fingertips during grasping is then computed and a dynamic relation(model)is established through system identification in *** estimated models generated a fitting accuracy of more than 80%.The model is then programmed into the Arduino microcontroller,so that a real-time and proportional force feedback is channeled to amputees through a micro *** such percentages of accuracy in sensory feedback without relying on touch sensors on the prosthetic hand that could be affected by mechanical wear and other interaction factors is *** advanced signal processing and classification techniques may also refine the findings to better capture and correlate the force variations with the sensory feedback.

关键词： FMG sensory feedback prosthetic hand bionic robot modality-matched sensory stimulation

Robust Fingerprint Construction Based on Multiple Path Loss Model (M-PLM) for Indoor Localization

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Computers, Materials & Continua 2023年第1期74卷 1801-1818页

作者： Yun Fen Yong Chee Keong tan Ian Kim Teck tan Su Wei tan School of Information Technology Monash University MalaysiaSubang JayaSelangorMalaysia School of Mathematical and Computer Sciences Heriot-Watt University MalaysiaWilayah Persekutuan PutrajayaMalaysia

A robust radio map is essential in implementing a fingerprint-based indoor positioning system(IPS).However,the offline site survey to manually construct the radio map is time-consuming and *** interpolation techniques have been proposed to infer the virtual fingerprints to reduce the time and effort required for offline site *** paper presents a novel fingerprint interpolator using a multi-path loss model(MPLM)to create the virtual fingerprints from the collected sample data based on different signal paths from different access points(APs).Based on the historical signal data,the poor signal paths are identified using their standard *** proposed method reduces the positioning errors by smoothing out the wireless signal fluctuations and stabilizing the signals for those poor signal *** consideringmultipath signal propagations from different APs,the inherent noise from these signal paths can be ***,locations of the signal data with standard deviations higher than the threshold are *** new fingerprints are then generated at these locations based on the proposed M-PLM interpolation function to replace the old *** proposed technique interpolates virtual fingerprints based on good signal paths with more stable signals to improve the positioning *** results show that the proposed scheme enhances the positioning accuracy by up to 44%compared to the conventional interpolation techniques such as the Inverse DistanceWeighting,Kriging,and single Path *** a result,we can overcome the site survey problems for IPS by building an accurate radio map with more reliable signals to improve indoor positioning performance.

关键词： Path loss model radio map indoor positioning system interpolation fingerprinting

最大脂肪氧化强度运动改善超重或肥胖人群身体成分、心肺耐力和脂质代谢的Meta分析

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中国全科医学 2025年第3期28卷 335-345页

作者：卢冬磊谭思洁杨风英天津体育学院天津市体卫融合与健康促进重点实验室天津市301617 天津体育学院运动训练学院天津市301617 山东体育学院运动与健康学院山东省济南市250102

背景研究证实,超重或肥胖人群体质(体成分、心肺耐力、脂质代谢)与肥胖密切相关,并可能存在双向关联。最大脂肪氧化强度(FATmax)运动作为一种新型运动干预手段,可有效促进体质改善,但改善效果的量化关系需要进一步探讨。目的系统评价F... 详细信息

背景研究证实,超重或肥胖人群体质(体成分、心肺耐力、脂质代谢)与肥胖密切相关,并可能存在双向关联。最大脂肪氧化强度(FATmax)运动作为一种新型运动干预手段,可有效促进体质改善,但改善效果的量化关系需要进一步探讨。目的系统评价FATmax运动对超重或肥胖人群体质相关指标的干预效果。方法检索Pubm Med、Web of Science、EBSCO、中国知网、维普网、万方数据知识服务平台,检索FATmax运动对超重或肥胖患者身体成分、心肺耐力、脂质代谢相关指标干预效果的随机对照试验,检索时间为2001年1月—2024年1月。基于Cochrane风险偏倚评估工具评估纳入文献的质量,Meta分析由Rev Man 5.4软件完成。结果共纳入16项随机对照试验,包含568例超重或肥胖患者。Meta分析结果显示,与对照组相比,FATmax运动干预组身体成分[BMI:WMD=-1.82,P60 min/次的组合运动。结论 FATmax运动可显著改善超重或肥胖患者BMI、BFR、WHR、VO2_(max)、TG、HDL-C、LDL-C结局指标,但对TC并无改善作用。

关键词：最大脂肪氧化强度超重肥胖身体成分心肺耐力血脂

Extension of Isometries on the Unit Sphere of L^p Spaces

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Acta Mathematica Sinica,English Series 2012年第6期28卷 1197-1208页

作者： Dong Ni tan Department of Mathematics Tianjin University of Technology School of Mathematical Science Nankai University

In this paper we study the isometric extension problem and show that every surjective isometry between the unit spheres of L^p（μ）（1 〈 p 〈∞, p ≠ 2） and a Banach space E can be extended to a linear isometry from L^p（μ） onto E, which means that if the unit sphere of E is （metrically） isometric to the unit sphere of L^P（μ）, then E is linearly isometric to L^p（μ）. We also prove that every surjective 1-Lipschitz or anti-l-Lipschitz map between the unit spheres of L^p（μ1, H1） and L^p（μ2, H2） must be an isometry and can be extended to a linear isometry from L^p（μ2, H2） to L^p（μ2, H2）, where H1 and H2 are Hilbert spaces.

关键词： Tingley's problem 1-Lipschitz anti-l-Lipschitz isometry isometric extension

THEORETICAL,NUMERICAL AND EXPERIMENTAL STUDY OF WATER HAMMER IN PIPE SYSTEM WITH COLUMN SURGE CHAMBER

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Journal of Hydrodynamics 2003年第5期15卷 20-28页

作者： tan Soon Keat ENV-NTU Environmental Engineering Research Centre

A new kind of governing equations for water hammer based on the elasticcolumn theory was proposed and adopted to analyse water hammer phenomenon in the pipe system with avertical column surge chamber and water level fluctuation in the surge chamber during pressuretransient. The wrongness existing in the classical governing equations for water hammer wasanalysed. A typical reservoir-valve pipe system was chosen as an example to verify the new governingequations numerically and experimentally. The finite difference method based on the method ofcharacteristics was used to solve numerically the nonlinear characteristic equations. The temporalevolutions of transient volume flux and head and of water level fluctuation for various surgechamber configurations were worked out, assuming that the air in the surge chamber are *** relevant experiment was conducted to verify the new governing equations and numerical *** numerical and experimental results show that the new governing equations are valid and theconventional assumption that the pressure head at the base of a surge chamber equals that of thestatic head above it during pressure transient is not always valid. The surge chamber generallyreises the period of transient pressure wave in pipe system, reduces the maximum pressure envelopeand lifts the minimum envelope substantially. The water level fluctuation in the surge chamber wasnumerically and experimentally observed. Increasing the size of the surge chamber and/or decreasingthe initial air pressure in the surge chamber enhance the effectiveness of the surge chamber insuppressing pressure wave.

关键词： water hammer vertical column surge chamber pipe system

ON DETERMINATION OF THE IMPULSIVE SOLUTIONS AND IMPULSIVE PROPERTIES TO LINEAR NON-HOMOGENEOUS MATRIX DIFFERENTIAL EQUATIONS

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Acta Mathematica Scientia 2000年第2期20卷 261-272页

作者： tan Liansheng Wuhan Institute of Physics and Mathematics The Chinese Academy of SciencesWuhan 430071China

This note contains three main ***,a complete solution of the Linear Non-Homogeneous Matrix Differential Equations(LNHMDEs)is presented that takes into account both the non-zero initial conditions of the pseudo state and the nonzero initial conditions of the ***,in order to characterise the dynamics of the LNHMDEs correctly,some important concepts such as the state,slow state(smooth state)and fast state(impulsive state)are generalized to the LNHMDE case and the solution of the LNHMDEs is separated into the smooth(slow)response and the fast(implusive)*** a third result,a new characterization of the impulsive free initial conditions of the LNHMDEs is given.

关键词： linear matrix differential equation impulsive and smooth solution impulsive free initial conditions {1}-inverse

Blow-up Solutions for Mixed Nonlinear Schrodinger Equations

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Acta Mathematica Sinica,English Series 2004年第1期20卷 115-124页

作者： Shao Bin tan Department of Mathematics Xiamen UniversityXiamen 361005P.R.China

This paper is concerned with the initial boundary-value problem for the following nonlinear evolution equation:

关键词： Existence Nonexistence Blow-up Nonlinear Schrodinger equation

有限元分析不同程度冈上肌断裂对肩关节应力的影响

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中国组织工程研究 2025年第9期29卷 1768-1774页

作者：徐彪路坦姜亚琼阴玉娇新乡医学院第一附属医院河南省卫辉市453100

背景:目前研究冈上肌的精细解剖及各亚区域的生物力学表现的实验较多,但是对冈上肌不同区域的损伤所带来的肩关节应力的影响鲜有耳闻。很有必要了解不同区域的冈上肌损伤对关节软骨及关节盂的应力大小及分布的影响,从而给临床诊治提供... 详细信息

背景:目前研究冈上肌的精细解剖及各亚区域的生物力学表现的实验较多,但是对冈上肌不同区域的损伤所带来的肩关节应力的影响鲜有耳闻。很有必要了解不同区域的冈上肌损伤对关节软骨及关节盂的应力大小及分布的影响,从而给临床诊治提供一些理论支持。目的:探究在三维有限元软件中模拟不同程度的冈上肌断裂对肱骨软骨面、关节盂唇及关节盂软骨关节面的最大应力值。方法:获取正常健康的肩关节CT或MRI导入Mimics、Geomagic进行提取模型,再通过Soildworks对模型构建,再对各个模型的冈上肌进行不同程度的损伤,模拟出不同区域的断裂。最后导入机械软件Ansys,进行三维有限元生物力学分析,计算肱骨软骨面、关节盂唇及关节盂软骨关节面的应力数值。结果与结论:①随着冈上肌损伤程度的加重肩关节软骨面及盂唇的应力也会增加;②冈上肌前部在各区域中最为重要;③不同程度的冈上肌断裂对肩关节盂唇面的软骨应力大小有影响,而应力的分布区域无明显改变;④提示肩关节水平外展起始时,前部发挥着重要的作用,其次为后部深区;当冈上肌前部损伤时肩关节软组织应力增加明显,还容易引起关节盂唇顶部及关节盂软骨前下方的损伤。

关键词：冈上肌肩关节关节盂生物力学有限元分析

Key technologies and development trends of the soft abrasive flow finishing method

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2023年第12期24卷 1043-1064页

作者： Yunfeng tan Yesha NI Weixin XU Yuanshen XIE Lin LI Dapeng tan Key Lab of E&M Ministry of Education&Zhejiang ProvinceZhejiang University of TechnologyHangzhou 310014China State Key Laboratory of Fluid Power and Mechatronic Systems Zhejiang UniversityHangzhou 310058China Collaborative Innovation Center of High-end Laser Manufacturing Equipment Zhejiang Province&Ministry of EducationHangzhou 310014China

This paper reviews recent developments of the soft abrasive flow finishing(SAF)method in constraint *** multiphase fluid dynamics modeling,material removal mechanism,auxiliary strengthening finishing techniques,and observation of surface impact effects by abrasive particles and cavitation bubbles are presented in *** prospects and challenges are given for four aspects:thin-walled curved surfaces,biomedical functions,electronic information,and precise optical components.

关键词： Soft abrasive flow finishing(SAF) Dynamic modeling Material removal mechanism Processing optimization Strengthening finishing control technology