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IEEE MTT-S International Microwave Biomedical Conference (IMBioC)

作者： Mehrjouseresht, Pouya Babarinde, Oluwatosin J. El Hail, Reda Schreurs, Dominique M. M. -P. Katholieke Univ Leuven Dept Elect Engn Div ESAT WAVECORE Leuven Belgium DTAI FET Flanders Make Leuven Belgium Katholieke Univ Leuven Leuven AI DTAI Dept Comp Sci Geel Belgium

ISBN: (纸本)9781665492171

This paper demonstrates the use of a people tracking algorithm and beamforming technique in monitoring vital signs for smart home applications. A person's location and velocity are detected. When the person remains stationary within a specific area (distance and angle), the radar beam is steered towards the target, and vital signs are measured. The advantage of this approach is not only the physiological parameters can be monitored in different positions by steering the transmitted signals towards the target's location, but also the target's range bin can be recognized clearly from other clutter according to its amplitude. To extract vital signs, the received signals from two receiver channels are combined. An algorithm based on continuous wavelet transform (CWT) with different mother wavelets is applied to the phase of the combined signal. The experimental results demonstrate that the proposed algorithm can monitor breathing and heart rate with a maximum error of 10.7% and 11.51%, respectively, within a range of 1 to 2 meters and an angle from -40 to 40 degrees.

关键词： FMCW radar Vital signs Beam steering tracking algorithm Smart home

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High Accuracy tracking with an Active Pan-Tilt-Zoom Camera

High Accuracy Tracking with an Active Pan-Tilt-Zoom Camera

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2015 International Conference on Computer Information Systems and Industrial Applications(CISIA2015)

作者： W.Fu L.Gao School of Electronics and Information Engineering Xi'an Technological University

ISBN: (纸本)9781510805750

Traditional PTZ tracking system focus on tracking algorithm,but PTZ camera control is not taken seriously and the control method has the large *** algorithm for PTZ camera control is defined according to the target position which is achieved by the tracking algorithm in the image,calculates the rotation angles of the two motors to control the PTZ *** a result,the target appears in the centre of the *** paper proposes a model-based algorithm for PTZ camera control,taking into account the camera distortion and the deviation is within 5 *** results show that the algorithm can be effectively applied to PTZ tracking system.

关键词： PTZ camera control tracking algorithm camera calibration

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Graph Based Visual Object tracking

Graph Based Visual Object Tracking

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2009 ISECS International Colloquium on Computing, Communication, Control, and Management

作者： Zhou Guanling College of Automation of Beijing Union University Beijing, China Wang Yuping, Dong Nanping College of Automation of Beijing Union University Beijing, China

Object tracking is viewed as a two-class "oneversus-rest" classification problem, in which the sample distribution of the target is approximately Gaussian while the background samples are often multi-modal. Based on these special properties, we model the visual appearance via graph approach, which is a semi-supervised approach. The topology structure of graph is carefully designed to reflect the properties of the sample's distribution. The confidence of sample's label is computed via random walk with restart (RWR) . The primary advantage of our algorithm is that it keeps the appearance of object via semi-supervised method. Experimental results demonstrate that, compared with two state of the art methods, the proposed tracking algorithm is more effective, especially in dynamically changing and clutter scenes.

关键词： visual object tracking algorithm semi-supervised method multi-modal

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Optimized Super-Resolution Ranging over ToA Measurements

Optimized Super-Resolution Ranging over ToA Measurements

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IEEE Wireless Communications and Networking Conference (WCNC)

作者： Oshiga, Omotayo Severi, Stefano Abreu, Giuseppe Jacobs Univ Bremen Campus Ring 1 D-28759 Bremen Germany

ISBN: (纸本)9781479930838

We propose a new accurate ranging algorithm for Time of arrival (ToA)-based wireless network localization. Although many works have been done in the current literature to optimize localization and tracking algorithms, the mitigation of ranging errors is still a very challenging problem. To this end, we combine and optimize two well-known super-resolution algorithms such as Music and Root-Music, commonly used in the estimation of the direction of arrival of incoming signal sources of a linear antenna array, with the powerful mathematical notion of a Golomb Ruler. The results are proved to be tremendously efficient and to almost reach the fundamental localization limits depicted by the Cramer-Rao lower bound (CRLB).

关键词： direction-of-arrival estimation linear antenna arrays radio networks signal sources time-of-arrival estimation CRLB Cramε?r-Rao lower bound Golomb Ruler ToA measurement direction of arrival estimation linear antenna array localization algorithm ranging error mitigation superresolution ranging algorithm time of arrival-based wireless network localization tracking algorithm Arrays Covariance matrices Distance measurement Multiple signal classification Signal resolution Vectors Wireless networks

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Robust Coordinated Motion Planning for UGV/UAV Agents in Disturbed Environment 8

Robust Coordinated Motion Planning for UGV/UAV Agents in Dis...

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8th International Conference on Modelling, Identification and Control (ICMIC)

作者： Ferrag, Abdelmoumen Oussar, Abdelatif Guiatni, Mohamed Ecole Mil Polytech Control Lab Bordj El Bahri Algeria

ISBN: (纸本)9780956715777

In this paper, a coordinated motion of two types of heterogeneous robots, namely unmanned aerial vehicle (UAV) and unmanned ground vehicle (UGV) is considered. The UGV plays the role of a leader for the UAV. While UGV tracks a predefined geometric path, the UAV is supposed to track the UGV. A robust controller based on integral sliding mode is designed to solve the tracking problem in the presence of input saturations and of the unknown disturbances, and tracking controller algorithm is considered for UAV to track the UGV. Simulations results are presented in order to evaluate the performances of the proposed approach.

关键词： coordinated motion UAV UGV robust control tracking algorithm

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A novel high frequency signal injection strategy for self-sensing control of electric AC machine drives 44

A novel high frequency signal injection strategy for self-se...

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44th Annual Conference of the IEEE Industrial-Electronics-Society (IECON)

作者： Messali, Amir Hamida, Med Aassad Ghanes, Malek Koteich, Mohamad Cent Nantes CNRS LS2N UMR 6004 Nantes France Renault Grp Technoctr Guyancourt France

ISBN: (纸本)9781509066841

In this paper, an improved high frequency (HF) injection method coupled with a robust observer is proposed for Interior Permanent Magnet Synchronous Motor (IPMSM), to estimate position, speed and acceleration without mechanical sensors. The contribution is twofold. First, a square-wave HF signal injection method with a new demodulation process is adopted to improve the performances of the self-sensing control. Second, an extended sliding mode observer combined with the HF method is proposed to get over the knowledge of machine parameters (inductances, inertia, frictions,...) and to improve the estimation error in transient modes, which are the drawbacks of existing tracking algorithms (phase-locked loop (PLLs), mechanical system observers, inverse of tangent). Simulation and experimental results are provided to show the effectiveness and the robustness of the proposed strategy in the framework of electric propulsion used in automotive applications.

关键词： Synchronous machine HF signal injection tracking algorithm sliding mode observer self-sensing conrol

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Wavelet transform based facial feature points detection 14

Wavelet transform based facial feature points detection

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14th International Multi-Conference on Systems, Signals & Devices (SSD)

作者： Maaoui, Choubeila Abdat, Faiza Pruski, Alain Lorraine Univ LCOMS Metz France

ISBN: (纸本)9781538631751

In this paper, we focus our attention on the detection and tracking feature points algorithm for video sequence environment. For face image extraction, modified face detector based on Haar-like features is used. For feature points detection, we develop a new method based on the wavelet decomposition. For more accuracy, good features can be identified using Shi and Thom asi alogorithm around the detected points. Pyramidal Lucas-Kanade algorithm is used to track those points. Results show that our method extracts facial features points from video's sequence with a good accuracy.

关键词： facial expression facial feature extraction tracking algorithm wavelet transform

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3-D high-density strain mapping procedure based on high-resolution CT

3-D high-density strain mapping procedure based on high-reso...

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5th International Conference on Processing and Manufacturing of Advanced Materials

作者： Kobayashi, Masakazu Toda, Hiroyuki Ohgaki, Tomomi Uesugi, Kentaro Wilkinson, David S. Kobayashi, Toshiro Kawai, Yuji Aoki, Yoshirnitsu Toyohashi Univ Technol Dept Prod Syst Engn Toyohashi Aichi 4418580 Japan Japan Synchrotron Radiat Res Inst Hyogo 6795198 Japan McMaster Univ Dept Mat Sci & Engn Hamilton ON L8S 4L7 Canada Shibaura Inst Technol Dept Informat Engn Saitama 3378570 Japan

ISBN: (纸本)9780878494286

A tracking procedure for the high-resolution X-ray computed tomography (CT) has been developed in order to measure 3-D local strain within a deforming material in high-density. A dispersion-strengthened copper alloy model sample with alumina particles, which contains micropores, was visualized by the synchrotron radiation CT. The pores observed in reconstructed CT volumes were used as tracking markers. The developed tracking method using a set of matching parameters, which classifies matched, pended and rejected markers, exhibited high ratio of success tracking. Furthermore, the ratio was improved by applying the spring model method, which is one of the particle image velocity (PIV) methods utilized in the field of the fluid mechanics, to the pended markers. The method based on the image analysis of CT imaging volumes provides us 3-D high-density strain mapping.

关键词： tracking algorithm interior strain local strain synchrotron radiation computer tomography 3-D observation 3-D image analysis

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Tropical cyclogenesis and its relation to interactions between African easterly waves and mesoscale convective systems

Tropical cyclogenesis and its relation to interactions betwe...

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作者： Nunez Ocasio, Kelly PennState University Libraries

学位级别：Doctor of Philosophy

Tropical cyclogenesis remains a challenging research topic, in part due to the limited understanding of the interactions between the mesoscale processes and the TC-seedling synoptic-scale vortex. The interactions between African easterly waves (AEWs) and mesoscale convective systems (MCSs) over Africa and east Atlantic and how they pertain to the formation of tropical cyclone (TCs) are documented. First, an algorithm that objectively tracks MCSs over Africa is developed to analyze the morphology and climatology of these systems over Africa. It is shown that realistic MCS propagation over Africa is attained when the tracker accounts for the African Easterly Jet (AEJ) mean background flow in which the MCSs propagate *** an MCS dataset in place, a climatology AEW-MCS dataset is developed to perform a wave-relative analysis of AEW-MCS systems over Africa and over the Main Development Region. It is found that the MCSs of developing AEW-MCS systems (those that develop into TCs) are more likely to be in phase with and propagate at the same speed as the AEW trough. In contrast, the MCSs of non-developing AEW-MCS systems are more likely to be positioned south of the AEW trough and do not necessarily propagate at the same speed. In addition, it is found that developing AEWs over West Africa are associated with a larger number of Convective Cloud Clusters (CCCs; squall line-type systems) than non-developing AEWs. Over West Africa, the fraction of extremely large MCS areas associated with developing AEWs is larger than for non-developing AEWs. These findings support the notion that both the position of moisture and latent heating relative to the AEW trough are essential for *** the synoptic-scale, significant differences between developing and non-developing AEWs are identified over eastern Africa (region of AEW onset) that can inform tropical cyclogenesis prediction. TC precursors when compared to non-developing AEWs experience: anomalously active West African

关键词： Africa Mesoscale systems Waves atmospheric Cyclogenesis/cyclolysis Africa Mesoscale convective systems African easterly waves Tropical cyclogenesis tracking algorithm West African monsoon satellite imagery infrared observations

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Quantifying right ventricular motion and strain using 3D cine DENSE MRI

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Journal of Cardiovascular Magnetic Resonance 2011年第Suppl 1期13卷 1-2页

作者： Auger, Daniel A Zhong, Xiaodong Meintjes, Ernesta M Epstein, Frederick H Spottiswoode, Bruce S University of Cape Town Cape Town South Africa MR R&D Collaborations Siemens Medical Solutions Atlanta GA United States University of Virginia Charlottesville VA United States

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