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Development of an electrocardiograph prototype for educational purposes

Development of an electrocardiograph prototype for education...

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international conference on electrical engineering, computing science and automatic control (CCE)

作者： Manuel Alejandro Ojeda Misses Marlen Valdés Fuentes Mauricio Díaz Muñoz Departamento de Control Automático CINVESTAV-IPN Ciudad de México México Tecnoló gico de Estudios Superiores de Huixquilucan México Mexico Universidad Nacional Autónoma de México Mexico City Mexico

This paper presents the design and the development of an electrocardiograph prototype with an interface based in a heart animation for educational purposes. The research main features is to prove the potential for opening possibilities to design and to create laboratory practices in subjects such as biophysics, animal physiology and human physiology. The system is composed of an analog circuit that retrieves and amplifies the signals received from the body to enable further processing using three electrodes of silver chloride (AgCI). We present a bioexperiment acquiring the electrocardiogram (ECG) signal using a computer, Arduino and Matlab by three central derivations. The presented result is from a student of a group of fifteen people, this shows that the basic records allow the analysis of the QRS complex of a cardiac cycle as well as the frequency during different conditions, such as rigorous exercise and resting state.

关键词： Prototypes Electrocardiography Heart Matlab Tools Animation Data acquisition

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A general approach for synthesis of supervisors for partially-observed discrete-event systems 19

A general approach for synthesis of supervisors for partiall...

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19th IFAC World Congress on international Federation of automatic control, IFAC 2014

作者： Yin, Xiang Lafortune, Stéphane Department of Electrical Engineering and Computer Science University of Michigan Ann ArborMI48109 United States

ISBN: (纸本)9783902823625

We revisit the synthesis of supervisors for partially-observed discrete-event systems from a new angle, based on the construction of a new structure called the All Inclusive controller (or AIC). We consider control problems for safety specifications, where the legal language is a prefix-closed sublanguage of the system language. We define the AIC as a bipartite transition system that embeds all safe supervisors and thus all controllable and observable sublanguages of the legal language. The structure of the AIC is that of a bipartite graph, reminiscent of a game between the supervisor and the system, with (i) control states, where all safe control decisions are enumerated, and (ii) system states, where all feasible observable system events are executed. The states of the AIC are information states, i.e., subsets of system states. We present an algorithm for the construction of the AIC. This algorithm exploits the pre-computation of the so-called extended specification, which makes the safety of a control state a function of the current information state alone, thereby allowing for on-the-fly construction of the AIC, if so desired. We discuss the properties of the AIC. We also describe how the AIC can be used for synthesis of supervisors that possess a desired maximality property. © IFAC.

关键词： Discrete event simulation

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Time and amplitude relationships of the ballistocardiogram in vertical and horizontal direction

Time and amplitude relationships of the ballistocardiogram i...

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international conference on electrical engineering, computing science and automatic control (CCE)

作者： Pablo S. Luna-Lozano Carlos Alvarado-Serrano Faculty of Engineering in Electronic Instrumentation University of Veracruz Xalapa Veracruz Mexico Bioelectronics Section Department of Electrical Engineering Cinvestav Mexico Distrito Federal Mexico

The ballistocardiogram (BCG) is the record of the reaction forces of the body due to the mechanical action of the heart and the blood flow in the main arteries. Currently the BCG is commonly recorded in longitudinal direction (head-to-foot) and has been proposed as a complementary tool to estimate hemodynamic changes either alone or simultaneous with an additional cardiac signal used as a reference. However, the relationship between the BCG in different directions has not received much attention. In this work, the vertical and horizontal BCG in seated subjects are analyzed and their amplitude and time relationship are explored. Three different analyses have been performed: each separate BCG, between BCG signals, and between both BCG signals and the electrocardiogram. Time analysis of both BCG signals show that the I wave in the horizontal precedes that in the vertical direction, which contrast to the reported previously in the bibliography. The H wave was usually smaller in the horizontal BCG than in the vertical BCG, or even absent in the former. Two-axis BCG, which is easily recorded in seated persons, can be used as a complementary tool to assess the cardiovascular system.

关键词： Electrocardiography Signal to noise ratio Heart Force Cutoff frequency Blood flow Active filters

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A new algorithm of echo cancellation in mobile applications

A new algorithm of echo cancellation in mobile applications

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2011 international conference on computing, Information and control, ICCIC 2011

作者： Jun, Sun Li Bin, Dai Shou-Yong, Zhang School of Electrical Engineering Henan University of Technology Zhengzhou 450001 China School of Information Science and Engineering Henan University of Technology Zhengzhou 450001 China

ISBN: (纸本)9783642239977

Mobile communication network echo is mainly caused by two factors: mobile terminals and wireless network delay. Several adaptive algorithms are found to offset the echo of wireless network delay, such as the LMS-type algorithm (including the NLMS, BLMS), and RLS algorithms. By analysis and comparison of their performances, a new algorithm (NLMS-BRLS) is obtained for echo cancellation in mobile communication systems, and the simulation results demonstrate the efficiency of the proposed method. © 2011 Springer-Verlag.

关键词： Echo suppression

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Optimizing Service Placement in Edge-to-Cloud AR/VR Systems Using a Multi-Objective Genetic Algorithm 14

Optimizing Service Placement in Edge-to-Cloud AR/VR Systems ...

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14th international conference on Cloud computing and Services science, CLOSER 2024

作者： Herabad, Mohammadsadeq G. Taheri, Javid Ahmed, Bestoun S. Curescu, Calin Department of Mathematics and Computer Science Karlstad University Karlstad Sweden School of Electronics Electrical Engineering and Computer Science Queen’s University Belfast Belfast United Kingdom Department of Computer Science Faculty of Electrical Engineering Czech Technical University Prague Czech Republic Ericsson AB Stockholm Sweden

ISBN: (纸本)9789897587016

Augmented Reality (AR) and Virtual Reality (VR) systems involve computationally intensive image processing algorithms that can burden end-devices with limited resources, leading to poor performance in providing low latency services. Edge-to-cloud computing overcomes the limitations of end-devices by offloading their computations to nearby edge devices or remote cloud servers. Although this proves to be sufficient for many applications, optimal placement of latency sensitive AR/VR services in edge-to-cloud infrastructures (to provide desirable service response times and reliability) remain a formidable challenging. To address this challenge, this paper develops a Multi-Objective Genetic Algorithm (MOGA) to optimize the placement of AR/VR-based services in multi-tier edge-to-cloud environments. The primary objective of the proposed MOGA is to minimize the response time of all running services, while maximizing the reliability of the underlying system from both software and hardware perspectives. To evaluate its performance, we mathematically modeled all components and developed a tailor-made simulator to assess its effectiveness on various scales. MOGA was compared with several heuristics to prove that intuitive solutions, which are usually assumed sufficient, are not efficient enough for the stated problem. The experimental results indicated that MOGA can significantly reduce the response time of deployed services by an average of 67% on different scales, compared to other heuristic methods. MOGA also ensures reliability of the 97% infrastructure (hardware) and 95% services (software). © 2024 by SCITEPRESS – science and Technology Publications, Lda.

关键词： Augmented reality

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SCTP throughput improvement through automatic path switching

SCTP throughput improvement through automatic path switching

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8th international conference on Information science and Digital Content Technology, ICIDT 2012

作者： Joe, Inwhee Huang, Erzheng Division of Computer Science and Engineering Hanyang University Seoul 133-791 Korea Republic of

ISBN: (纸本)9788988678695

In this paper, the most current domestic and abroad research is still on the theory and simulation stage. Research for the promotion and optimization on SCTP in practical networks still lags behind in the following aspects: (1) Test bed platform is still required for optimization of handoff execution process and handoff decision in practical physical networks. (2) Path bandwidth is required as an important parameter in some transport layer congestion control mechanisms;optimization of handoff execution process and handoff decision design, but the typical SCTP protocol stack implementation is still lack of path bandwidth estimating mechanism. (3) NAT (Network Address Translation) devices, normally existing in the current IP network, are mostly not available on the SCTP protocol support, resulting in SCTP packet transmission blocking problems, which affect the promotion of the SCTP protocol. In this paper, we propose to improve the SCTP throughput based on automatic path switching between primary path and secondary path according to the path conditions. The simulation results show that the SCTP throughput is improved significantly. © 2012 AICIT.

关键词： Bandwidth

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A throughput-efficient two level access control scheme for multimedia CDMA networks

A throughput-efficient two level access control scheme for m...

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2006 international Wireless Communications and Mobile computing conference, IWCMC 2006

作者： Chen, Zhihui Khokhar, Ashfaq Baqai, Shahab Department of Electrical and Computer Engineering University of Illinois at Chicago United States Department of Computer Science Lahore University of Management Sciences Lahore Pakistan

ISBN: (纸本)1595933069

This paper presents a novel hierarchical approach where call admission level control and slot level control schemes are designed in a unified framework for efficient transmission of multimedia traffic over CDMA networks. The voice traffic is modeled using an on-off Markov model to accurately capture the inherent temporal correlations and the data traffic is modeled as delay tolerant and greedy. i.e. data traffic always tries to utilize the maximal available bandwidth. The simulation results show that the proposed hierarchical access scheme improves channel utilization by 15-18% compared to the existing schemes in the literature. Also, by rejecting incoming traffic at both call admission and slot levels our method reduces interference. This significantly improves the Packet Error Rate (PER) while achieving maximal throughput. In particular the packet error rate is about 4 times lower for voice traffic and about 10 times lower for data traffic. Copyright 2006 ACM.

关键词： Access control

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Three Phase Multi-Level Inverter Topologies and Modulation Techniques: A Short review 2

Three Phase Multi-Level Inverter Topologies and Modulation T...

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2nd international conference on Intelligent computing, Instrumentation and control Technologies, ICICICT 2019

作者： Swamy, D. Manikanta Venkatesan, M. Vignan's Foundation for Science Technology and Research Department of Electrical and Electronics Engineering Vadlamudi Guntur India

ISBN: (纸本)9781728102832

In this paper recently proposed three-phase multi-level inverter topologies and modulation techniques are discussed. Multilevel inverter topologies (MLIs) are more utilized in high-medium power applications due to their several benefits such as less harmonic contents, less power dissipation on power switches and less electromagnetic interference (EMI) outputs. For harmonic elimination, the chosen switching method for inverter control is also a plays a significant role to produce the ideal output voltage. In this, mainly three different topologies are categorized in MLIs;those are diode clamped, flying capacitors and cascaded H-Bridge. Similarly, different H-Bridge inverter topologies and control techniques also discoursed. In this paper mainly focused on three-phase inverter using a single DC source and transformers. The various carrier based modulation techniques such as phase disposition (PD), Phase Opposite Dispostion (POD) and Alternate Phase Opposite Dispostion (APOD) have been invstigated through MATLAB/Simulink environments. © 2019 IEEE.

关键词： Topology

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Applications of Quantum Cascade Lasers in Spectroscopy and Trace Gas Analysis 4

Applications of Quantum Cascade Lasers in Spectroscopy and T...

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4th international conference on Advances in electrical, computing, Communication and Sustainable Technologies, ICAECT 2024

作者： Anandaram, Harishchander Velpula, Srikanth Ramkumar, M. Ramya, G. Lakshmisridevi, S. Ashok, P. Amrita Vishwa Vidyapeetham Amrita School of Artificial Intelligence Coimbatore India Sr University Department of Electrical and Electronics Engineering Telangana Warangal India Sri Krishna College of Engineering and Technology Electronics and Communication Engineering Tamilnadu Coimbatore India Prince Shri Venkateshwara Padmavathy Engineering College Department of Electronics and Communication Engineering Tamilnadu Chennai India Bs Abdur Rahman Crescent Institute of Science and Technology Department of Computer Science and Engineering Tamilnadu Chennai India Maharashtra Pune India

ISBN: (纸本)9798350343670

The primary emphasis of this research paper lies in advancing versatile quantum cascade laser-based spectroscopic methods tailored for highly sensitive gas detection. These techniques hold promise for a range of applications including atmospheric sensing, biomedical science, and high-resolution fundamental molecular spectroscopy. Quantum Cascade Lasers (QCLs) have revolutionized spectroscopic techniques and trace gas analysis due to their unique properties. In spectroscopy, QCLs offer widely tunable, high-powered, and narrow-linewidth radiation across the mid-infrared (MIR) region, enabling precise identification and quantification of molecular species. Utilizing a continuous wave cavity ring-down spectrometer (CW-CRDS) with high resolution, coupled with an external cavity continuous-wave quantum cascade laser (CW-EC-QCL) functioning within the wavenumber interval from 1250 cm1 to 1333 cm1 enables spectroscopic examination. This has found applications in various fields namely, Atmospheric Sensing, Biomedical science, Security and Defense, Environmental Monitoring, Industrial Process control, Astrophysics and Astronomy. In trace gas analysis, QCLs offer unmatched sensitivity and selectivity. They can detect minuscule concentrations of gases, down to parts per trillion or even lower, making them indispensable in fields where precise gas measurements are paramount. This includes environmental monitoring, medical diagnostics, industrial safety, and scientific research. The versatility and precision of QCL-based spectroscopic techniques continue to drive innovation and advancements in these diverse fields. © 2024 IEEE.

关键词： Free Space Optics Gain Switching Quantum Cascade Lasers Rate Equations Spectroscopic Techniques Trace Gas Analysis

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An information retrieval agent in web resources

An information retrieval agent in web resources

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IADIS international conference Intelligent Systems and Agents 2013, ISA 2013, IADIS European conference on Data Mining 2013, ECDM 2013, Part of the IADIS Multi conference on Computer science and Information Systems 2013, MCCSIS 2013

作者： Bryniarska, Anna Opole University of Technology Faculty of Electrical Engineering Automatic Control and Informatics ul. Sosnkowskiego 31 45-272 Opole Poland

ISBN: (纸本)9789728939939

The problem of designing a search system in the Web resources which are accepted as reliable by experts and the problem of designing an adequate information retrieval system, are difficult to solve, in general. They are not solved yet by the contemporary research in data mining systems: Information Retrieval (IR), Semantic Relations (SR), Word Sense Disambiguation (WSD). In this paper, an information retrieval system is specified as some diagnostic measurement system which, accordingly to experts' requirements, would find Web addresses of searched knowledge. This system will be called "the information retrieval agent" in the Semantic Web resources. © 2013 IADIS.

关键词： Data mining

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