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Blood Pressure Estimation with Phonocardiogram on CNN-Based Approach

Computers, Materials & Continua 2024年第5期79卷 1775-1794页

作者： Kasidit Kokkhunthod Khomdet Phapatanaburi Wongsathon Pathonsuwan Talit Jumphoo Patikorn Anchuen Porntip Nimkuntod Monthippa Uthansakul Peerapong Uthansakul School of Telecommunication Engineering Suranaree University of TechnologyNakhon Ratchasima30000Thailand Telecommunications Engineering Rajamangala University of Technology IsanNakhon Ratchasima30000Thailand navaminda kasatriyadhiraj royal air force academy Saraburi18180Thailand Institute of Medicine Suranaree University of Technology HospitalNakhon Ratchasima30000Thailand

Monitoring blood pressure is a critical aspect of safeguarding an individual’s health,as early detection of abnormal blood pressure levels facilitates timely medical intervention,ultimately leading to a reduction in mortality rates associated with cardiovascular ***,the development of a robust and continuous blood pressure monitoring system holds paramount *** the context of this research paper,we introduce an innovative deep learning regression model that harnesses phonocardiogram(PCG)data to achieve precise blood pressure *** novel approach incorporates a convolutional neural network(CNN)-based regression model,which not only enhances its adaptability to spatial variations but also empowers it to capture intricate patterns within the PCG *** advancements contribute significantly to the overall accuracy of blood pressure *** substantiate the effectiveness of our proposed method,we meticulously gathered PCG signal data from 78 volunteers,adhering to the ethical guidelines of Suranaree University of Technology(Human Research Ethics number EC-65-78).Subsequently,we rigorously preprocessed the dataset to ensure its *** further employed a K-fold cross-validation procedure for data division and alignment,combining the resulting datasets with a CNNfor blood pressure *** experimental results are highly promising,yielding aMeanAbsolute Error(MAE)and standard deviation(STD)of approximately 10.69±7.23 mmHg for systolic pressure and 6.89±5.22 mmHg for diastolic *** study underscores the potential for precise blood pressure estimation,particularly using PCG signals,paving the way for a practical,non-invasive method with broad applicability in the healthcare *** detection of abnormal blood pressure levels can facilitate timely medical interventions,ultimately reducing cardiovascular disease-related mortality rates.

关键词： Blood pressure phonocardiogram CNN-based deep learning

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A Multi-Mode Public Transportation System Using Vehicular to Network Architecture

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Computers, Materials & Continua 2022年第12期73卷 5845-5862页

作者： Settawit Poochaya Peerapong Uthansakul Monthippa Uthansakul Patikorn Anchuen Kontorn Thammakul Arfat Ahmad Khan Niwat Punanwarakorn Pech Sirivoratum Aranya Kaewkrad Panrawee Kanpan Apichart Wantamee School of Telecommunication Engineering Suranaree University of TechnologyNakhon Ratchasima30000Thailand Office of Graduate Studies Navaminda Kasatriyadhiraj Royal Air Force AcademyBangkok10220Thailand School of Mechanical Engineering Suranaree University of TechnologyNakhon Ratchasima30000Thailand School of Manufacturing Engineering Suranaree University of TechnologyNakhon Ratchasima30000Thailand Thaicom Public Company Limited Patumthani12140Thailand

The number of accidents in the campus of Suranaree University of Technology(SUT)has increased due to increasing number of personal *** this paper,we focus on the development of public transportation system using Intelligent Transportation System(ITS)along with the limitation of personal vehicles using sharing economy *** SUT Smart Transit is utilized as a major public transportation system,while MoreSai@SUT(electric motorcycle services)is a minor public transportation system in this *** are called Multi-Mode Transportation system as a ***,a Vehicle toNetwork(V2N)is used for developing theMulti-Mode Transportation system in the *** to equipping vehicles with On Board Unit(OBU)and 4G LTE modules,the real time speed and locations are transmitted to the *** data is then applied in the proposed mathematical model for the estimation of Estimated Time of Arrival(ETA).In terms of vehicle classifications and counts,we deployed CCTV cameras,and the recorded videos are analyzed by using You Only Look Once(YOLO)*** simulation and measurement results of SUT Smart Transit and MoreSai@SUT before the covid-19 pandemic are *** to the existing researches,the proposed system is implemented in the real *** final results unveil the attractiveness and satisfaction of ***,due to the proposed system,the CO_(2) gas gets reduced when Multi-Mode Transportation is implemented practically in the campus.

关键词： Smart transit intelligent transportation system(ITS) dedicated short range communication(DSRC) vehicle to network(V2N) vehicle to everything(V2X) electric vehicle(EV) you only look once(YOLO)

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Distributed adaptive Kalman filter based on variational Bayesian technique

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Control Theory and Technology 2019年第1期17卷 37-47页

作者： Chen HU Xiaoming HU Yiguang HONG Rocket force University of Engineering Xi'an Shannxi 710025 China epartment of Mathematics Royal Institute of Sweden (KTH) Sweden Institute of Systems Science and University of Chinese academy of Sciences Chinese Academy of Sciences Beijing 700790 China

In this paper, distributed Kalman filter design is studied for linear dynamics with unknown measurement noise variance, which modeled by Wishart distribution. To solve the problem in a multi-agent network, a distributed adaptive Kalman filter is proposed with the help of variational Bayesian, where the posterior distribution of joint state and noise variance is approximated by a free-form distribution. The con vergence of the proposed algorithm is proved in two main steps: n oise statistics is estimated, where each age nt only use its local information in variational Bayesian expectation (VB-E) step, and state is estimated by a consensus algorithm in variational Bayesian maximum (VB-M) step. Finally, a distributed target tracking problem is investigated with simulations for illustration.

关键词： Distributed Kalman filter adaptive filter multi-agent system variational Bayesian

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Interaction of polyhydroxy fullerenes with ferrihydrite：adsorption and aggregation

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Journal of Environmental Sciences 2018年第2期30卷 1-9页

作者： Jing Liu Runliang Zhu Tianyuan Xu Mingwang Laipan Yanping Zhu Qing Zhou Jianxi Zhu Hongping He Key Laboratory of Mineralogy and Metallogeny Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangdong Provincial Key Laboratory of Mineral Physics and Material Research & Development Guangzhou 510640 China University of Chinese academy of Sciences Beijing 100049 China

The rapid development of nanoscience and nanotechnology, with thousands types of nanomaterials being produced, will lead to various environmental impacts. Thus,understanding the behaviors and fate of these nanomaterials is essential. This study focused on the interaction between polyhydroxy fullerenes（PHF） and ferrihydrite（Fh）, a widespread iron（oxyhydr）oxide nanomineral and geosorbent. Our results showed that PHF were effectively adsorbed by Fh. The adsorption isotherm fitted the D-R model well, with an adsorption capacity of 67.1 mg/g. The adsorption mean free energy of 10.72 k J/mol suggested that PHF were chemisorbed on Fh. An increase in the solution p H and a decrease of the Fh surface zeta potential were observed after the adsorption of PHF on Fh; moreover, increasing initial solution p H led to a reduction of adsorption. The Fourier transform infrared spectra detected a red shift of C–O stretching from 1075 to 1062 cm-1 and a decrease of Fe–O bending, implying the interaction between PHF oxygenic functional groups and Fh surface hydroxyls. On the other hand, PHF affected the aggregation and reactivity of Fh by changing its surface physicochemical properties. Aggregation of PHF and Fh with individual particle sizes increasing from 2 nm to larger than 5 nm was measured by atomic force microscopy. The uniform distribution of C and Fe suggested that the aggregates of Fh were possibly bridged by PHF. Our results indicated that the interaction between PHF and Fh could evidently influence the migration of PHF, as well as the aggregation and reactivity of Fh.

关键词： Nanoparticles Polyhydroxy fullerenes Ferrihydrite Adsorption Aggregation

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Temperature-Dependent Photoluminescence Characteristics of InAs/GaAs Quantum Dots Directly Grown on Si Substrates

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Chinese Physics Letters 2016年第4期33卷 52-55页

作者：王霆刘会赟张建军 Institute of Physics Chinese Academy of Sciences Department of Electronic & Electrical Engineering University College London

The first operation of an electrically pumped 1.3μm InAs/GaAs quantum-dot laser was previously reported epitaxially grown on Si （100） substrate. Here the direct epitaxial growth condition of 1.3μm InAs/OaAs quantum on a Si substrate is further investigated using atomic force microscopy, etch pit density and temperature-dependent photoluminescence （PL） measurements. The PL for Si-based InAs/GaAs quantum dots appears to be very sensitive to the initial OaAs nucleation temperature and thickness with strongest room-temperature emission at 40000 （17Onto nucleation layer thickness）, due to the lower density of defects generated under this growth condition, and stronger carrier confinement within the quantum dots.

关键词： GaAs InAs Temperature-Dependent Photoluminescence Characteristics of InAs/GaAs Quantum Dots Directly Grown on Si Substrates of Si on

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Materials information and mechanical response of TRIP/TWIP Ti alloys

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npj Computational Materials 2021年第1期7卷 817-825页

作者： Guohua Zhao Xiaoqing Li Nik Petrinic Department of Engineering Science University of OxfordOxfordUK Department of Materials Science and Engineering KTH Royal Institute of TechnologyStockholmSweden

Materials innovation calls for an integrated framework combining physics-based modelling and data-driven informatics.A dislocation-based constitutive model accounting for both transformation-induced plasticity(TRIP)and twinning-induced plasticity(TWIP)was built to interpret the mechanical characteristics of metastable titanium *** attention was placed on quantitatively understanding the composition-sensitive phase stability and its influence on the underlying deformation *** this purpose,a pseudoelastic force balance incorporating thermodynamics and micromechanics was applied to calculate the energy landscapes ofβ→α″martensitic transformation,{332}(113)twinning and dislocation *** material data were probed,computed and fed to the *** results revealed that TRIP and TWIP may operate simultaneously because of the presence of a noticeably overlapped energy domain,and confirmed{332}(113)twinning is an energetically favourable deformation *** model validation further unveiled that the activation ofβ→α″transition remarkably enhances the strain-hardening and plasticity,even though the dynamically formedα″volume fraction is much less than that of deformation *** work suggests that the synchronised physical metallurgy and data-driven strategy allows to identify the compositional scenarios for developing high-performance engineering alloys.

关键词： deformation alloys dislocation

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PHoToNs–A parallel heterogeneous and threads oriented code for cosmological N-body simulation

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Research in Astronomy and Astrophysics 2018年第6期18卷 7-16页

作者： Qiao Wang Zong-Yan Cao Liang Gao Xue-Bin Chi Chen Meng Jie Wang Long Wang Key Laboratory of Computational Astrophysics National Astronomical Observatories Chinese Academy of Sciences Supercomputing Center Computer Network Information Center Chinese Academy of Sciences Institute for Computational Cosmology Department of Physics Durham University Science Laboratories System Department Baidu Group Ltd.

We introduce a new code for cosmological simulations, PHo To Ns, which incorporates features for performing massive cosmological simulations on heterogeneous high performance computer(HPC) systems and threads oriented programming. PHo To Ns adopts a hybrid scheme to compute gravitational force, with the conventional Particle-Mesh(PM) algorithm to compute the long-range force,the Tree algorithm to compute the short range force and the direct summation Particle-Particle(PP) algorithm to compute gravity from very close particles. A self-similar space filling a Peano-Hilbert curve is used to decompose the computing domain. Threads programming is advantageously used to more flexibly manage the domain communication, PM calculation and synchronization, as well as Dual Tree Traversal on the CPU+MIC platform. PHo To Ns scales well and efficiency of the PP kernel achieves68.6% of peak performance on MIC and 74.4% on CPU platforms. We also test the accuracy of the code against the much used Gadget-2 in the community and found excellent agreement.

关键词： methods: numerical galaxies: interactions dark matter

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DNA barcoding reveals commercial fraud related to yak jerky sold in China

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Science China(Life Sciences) 2016年第1期59卷 106-108页

作者： Yunyu Wang Kai He Long Fan Yushui Wang Shifang Wu Robert W Murphy Wenzhi Wang Yaping Zhang State Key Laboratory of Genetic Resources and Evolution and Yunnan Laboratory of Molecular Biology of Domestic Animals Kunming In-stitute of ZoologyChinese Academy of SciencesKunming 650223China Key Laboratory of Animal Models and Human Disease Mechanisms Kunming Institute of ZoologyChinese Academy of SciencesKunming 650223China Forensic Science Service of Yunnan Endangered Species Scientific Commission Kunming 650223China Centre for Biodiversity and Conservation Biology Royal Ontario MuseumToronto M5S 2C6Canada Guizhou academy of Testing and Analysis Guiyang 550002China Laboratory for Conservation and Utilization of Bio-resource and Key Laboratory for Microbial Resources of the Ministry of Education Yunnan UniversityKunming 650091China

Dear Editor, Instances of food mislabeling and adulteration scandals fo- cus public attention on food safety and market fraud. Such scandals force the authorities to enforce stringent regula- tions on food adulteration. The Chinese government and consumers are paying more attention to food resource qual- ity and safety regulation than ever before. The growing food market requires food authenticity at all stages of product processing, while species identification of raw materials is fundamental for food safety. Species substitution causes economical loss to consumers and may negatively affect public sanitation because of possible presence of toxic and parasite-infected species （Galimberti et al., 2013）.

关键词：商业欺诈中国政府条形码技术牦牛肉干 DNA 食品安全销售物种鉴定

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Difference in Unbalanced Magnetic force of Fractional-Slot PM Machines between Internal and External Rotor Topologie

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CES Transactions on Electrical Machines and Systems 2017年第2期1卷 154-163页

作者： L.J.Wu Z.Q.Zhu Youtong Fang Xiaoyan Huang College of Electrical Engineering Zhejiang UniversityChina epartment of electronic and electrical engineering university of sheffieldmappin streetsheffields13jduk royal academy of Engineering

This paper presents a comparative investigation into unbalanced magnetic force(UMF)of asymmetric permanent magnet machines without rotor eccentricities,particularly focusing on the difference between internal-and external-rotor *** asymmetric field distribution results in radial and tangential asymmetric force *** the radial and tangential stresses are in different direction,the UMF components they produce are nearly *** UMF from asymmetric radial force wave can be additive or subtractive to that from asymmetric tangential force *** shows that for the same pole slot number combination,if the UMFs due to radial and tangential force waves are additive in internal rotor machine,they are subtractive in the external rotor counterpart,and vice *** reveals a general rule determining whether additive or cancelling:for a UMF produced by any two field harmonics,they are additive if the higher order is produced by the outer part outside the airgap,but cancelling if the higher order is produced by the inner ***,for a machine with pole number 2p=3k+1,they are additive if it is an external-rotor machine,but otherwise *** the other hand,for a machine with pole number 2p=3k-1,they are subtractive if it is an external-rotor machine,but otherwise *** the UMF due to armature reaction only,they are subtractive for external-rotor machines,but otherwise *** investigation is carried out by an analytical model and validated by finite element analysis.

关键词： Analytical model electric machines fractional-slot machines permanent magnet machines unbalanced magnetic force

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Simulation study on the influence of longitudinal dynamic force on extreme-long heavy-haul trains

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Railway Sciences 2023年第4期2卷 495-513页

作者： Chongyi Chang Gang Guo Wen He Zhendong Liu Railway Science and Technology Research and Development Center China Academy of Railway Sciences Corporation LimitedBeijingChina Department of Engineering Mechanics KTH Royal Institute of TechnologyStockholmSweden

Purpose–The objective of this study is to investigate the impact of longitudinal forces on extreme-long heavy-haul trains,providing new insights and methods for their design and operation,thereby enhancing safety,operational efficiency and track system ***/methodology/approach–A longitudinal dynamics simulation model of the super long heavy haul train was established and verified by the braking test data of 30,000 t heavy-haul combination train on the long and steep down grade of Daqing *** simulation model was used to analyze the influence of factors on the longitudinal force of super long heavy haul ***–Under normal conditions,the formation length of extreme-long heavy-haul combined train has a small effect on the maximum longitudinal coupler force under full service braking and emergency braking on the straight *** slope difference of the long and steep down grade has a great impact on the maximum longitudinal coupler force of the extreme-long heavy-haul *** the condition that the longitudinal force does not exceed the safety limit of 2,250 kN under full service braking at the speed of 60 km/h the maximum allowable slope difference of long and steep down grade for 40,000 t super long heavy-haul combined trains is 13‰,and that of 100,000 t is only 5‰.Originality/value–The results will provide important theoretical basis and practical guidance for further improving the transportation efficiency and safety of extreme-long heavy-haul trains.

关键词： Heavy-haul combined train Longitudinal dynamics Train length Locomotive synchronization control Slope difference

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