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International Conference on Smart Innovations in Communications and Computational Sciences (ICSICCS)

作者： Cai, Bo Xiong, Lu Zhao, Jianhui Wuhan Univ Sch Comp Wuhan 430072 Hubei Peoples R China

ISBN: (纸本)9789811089718;9789811089701

Forest fire region from surveillance video is non-rigid object with varying size and shape. It is complex and thus difficult to be tracked automatically. In this paper, a new tracking algorithm is proposed by mean shift method and Gaussian mixture model. Based on moment features of mean shift algorithm, the size adaptive tracking window is employed to reflect size and shape changes of object in real time. Meanwhile, the Gaussian mixture model is utilized to obtain the probability value of belonging to fire region for each pixel. Then, the probability value is used to update the weighting parameter of each pixel in mean shift algorithm, which reduces the weight of non-fire pixels and increases the weight of fire pixels. With these techniques, the mean shift algorithm can converge to forest fire region faster and accurately. The presented algorithm has been tested on real monitoring video clips, and the experimental results prove the efficiency of our new method.

关键词： Non-rigid object tracking algorithm Mean shift method Gaussian mixture model

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Recognizing Motion Images Solid Waste Jumbled on a Neural Network with a Simple tracking Performed in an Automatic and Robotic Recycling Line 1

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1st International Symposium on Intelligent Computing Systems (ISICS)

作者： Garcia-Hernandez, Martin Flores, Alejandro Elizalde, Eleazar Garcia-Arredondo, Alejandro J. Gutierrez-Muro, Miguel A. Hevia-Montiel, Nidiyare CreoReal Syst & Technol Zapopan 45030 Jalisco Mexico Ingenia 4TI Div Technol Zapopan Jalisco Mexico CIATEQ AC Informat Technol Management Elect & Control Aguascalientes 20358 Mexico IIMAS UNAM Merida 97000 Yucatan Mexico

ISBN: (数字)9783319304472

ISBN: (纸本)9783319304472;9783319304465

In this paper, we show the vision system in recognition motion images and detection of solid urban waste (SUW) and their integration on an automatic robotic line with a simple tracking algorithm. The detection and image processing are able to detect, identify and calculate the position of the SUW and send the coordinates to a delta robot for selection. The image processing system is previously trained in a neural network. Delta robots are provided by ABB Corporation and have been programmed to select the SUW through a simple algorithm to tracking. We present the integration of these systems and we describe the automatic and robotic machine with the vision system.

关键词： Vision detection system Neural networks Image processing Delta robotic tracking algorithm Solid Urban Waste (SUW)

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Enhanced Weighted Centroid Localization in RFID Technology: Patient Movement tracking in Hospital 5

Enhanced Weighted Centroid Localization in RFID Technology: ...

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5th International Conference on Advanced Computing and Communication Systems (ICACCS)

作者： Chhetri, Bikash Thapa Alsadoon, Abeer Prasad, P. W. C. Venkata, Haritha Sallepalli Elchouemi, Amr Study Grp Australia Sydney NSW Australia Forbes Sch Business & Technol Lenexa KS USA

ISBN: (纸本)9781538695333

Technologies like Global positioning system (GPS), sensors, Infrared (IR) Wi-Fi, cellular signals, etc. for tracking the movement of an object lack the location precision. The existing systems developed with these technologies were lacked of efficiency and accuracy to locate patient inside the hospital for utilizing the available resources (doctors, nurse, staff and equipment). Therefore, we propose a system which minimizes the location error with less processing time for an indoor moving patient. Proposed system comprises Received Signal Strength Indicator (RSSI) with the existing Weighted Centroid Localization (WCL) methods improve the signal strength of a signal received from the tag and determining the exact position of moving tag by reducing the location error and improving the processing time The efficiently tracks moving patient inside the hospital with decreased processing time from 86ms to 52ms and 116ms to 97ms also less location error from 0.08m to 0.03m and 0.18m to 0.15m based upon the number of tags deployed, i.e. 10 and 20 respectively. Thus, this solution provides hospital management accurate tracking of moving patient for efficient allocation of the available resources (doctors, nurse, examination room, etc.) based upon their position.

关键词： Indoor navigation Radio Frequency Identification (RFID) system tracking algorithm Proximity location system

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2D tracking control algorithms 5th

2D tracking control algorithms

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Proceedings of the 5th WSEAS International Conference on Computational Intelligence, Man-Machine Systems and Cybernetics, CIMMACS '06

作者： Marius-Constantin, Popescu Anca, Petrişor Faculty of Electromechanical Engineering University of Craiova Bd. Decebal Nr. 107 Craiova200440 Romania

ISBN: (纸本)9608457564

The paper deals with the problem of control algorithms design and implementation, necessary to position a working tool in a fix point or to track a determined pattern. In this paper is described the way to accomplished the electrical and mechanical part of a working tool and also the way to design and implement a control algorithm necessary to optimize 2D trajectory. Finally the proposed control algorithm is validated through computer simulations.

关键词： Optimized algorithm Rotation Simulations tracking algorithm Transformation Translation

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A Hybrid Sonar algorithm for Submersible Cars to Verify the Location of Senders

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IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY 2012年第6期61卷 2707-2714页

作者： Kim, Jin Seok Yum, Dae Hyun Lee, Pil Joong Hong, Sung Je Kim, Jong Pohang Univ Sci & Technol POSTECH Pohang 790784 South Korea Agcy Def Dev Chang Won 645016 South Korea

In military applications, underwater vehicles do not communicate with each other. They use sonar systems to detect enemy vehicles that are trying hard not to make any sound or noise. In autonomous/unmanned underwater vehicles (AUVs, UUVs), sonar systems are usually employed to detect or avoid underwater obstacles. With the emergence of sQuba, a new breed of car that can be driven both on land and underwater, we explore a new sonar problem. How can an underwater moving vehicle verify the location of senders? As conventional sonar techniques are not appropriate for our purpose, we present a hybrid sonar algorithm that can help underwater vehicles locate target vehicles.

关键词： Location verification sonar algorithm submersible car tracking algorithm

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Examination of Cinnamomum camphora interlocked grain adopting X-ray computed tomography combined with particle image velocimetry

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JOURNAL OF WOOD SCIENCE 2022年第1期68卷 1-10页

作者： Cipta, Hairi Kobayashi, Kayoko Chen, Shuoye Sugiyama, Junji Kyoto Univ Grad Sch Agr Sakyo Ku Kyoto 6068502 Japan

Trees develop wood grain more or less parallel to the tree axis as they grow laterally. However, many tree species also develop interlocked grain that is expressed as a change in the wood grain orientation, periodically switching between left- and right-handed spirals over the years. Wood grain information is critical to determining the wood quality and is an important record of cellular events in a cambium. This study examined the wood grain of axial xylem cells in the semi-ring porous hardwood Cinnamomum camphora by first visualizing the three-dimensional structure using a conventional X-ray computed tomography instrument producing tomography images. We propose the use of particle image velocimetry (PIV) and the two-dimensional fast Fourier transform (2D-FFT) to analyze computed tomography images in obtaining grain angle (delta) information from the vessel deviation. We found undulation on the radial variation of the grain angle (delta) that indicates periodical changes in the wood grain orientation as left- and right-handed spirals ranging from - 25 degrees to 16 degrees and - 22 degrees to 18 degrees using the 2D-FFT and PIV, respectively. Furthermore, despite the major orientation of vessels inclining in the tangential direction, the PIV result revealed a minor deviation with vessels inclining in various orientations along the tree radius.

关键词： Grain angle Image analysis tracking algorithm Vessel network Water transport

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Regularized Zero-Forcing Beam Design under Time-Varying Channels

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ETRI JOURNAL 2016年第3期38卷 435-443页

作者： Yu, Heejung Kim, Taejoon Yeungnam Univ Dept Informat & Commun Engn Gyeonsan South Korea Chungbuk Natl Univ Sch Informat & Commun Engn Cheongju South Korea

In this paper, an efficient beam tracking algorithm for a regularized zero-forcing (RZF) approach in slowly fading multiple-input and single-output (MISO) broadcast channels is considered. By modifying an RZF equation, an RZF beam tracking algorithm is proposed using matrix perturbation theory. The proposed algorithm utilizes both beams from the previous time step and channel difference (between the previous and current time steps) to calculate the RZF beams. The tracking performance of the proposed algorithm is analyzed in terms of the mean square error (MSE) between a tracking approach and an exact recomputing approach, and in terms of the additional MSE caused by the beam tracking error at the receiver. Numerical results show that the proposed algorithm has almost the same performance as the exact recomputing approach in terms of the sum rate.

关键词： MISO broadcast channels RZF beamforming matrix perturbation tracking algorithm

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Two-Tier Precoding for FDD Multi-Cell Massive MIMO Time-Varying Interference Networks

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IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS 2014年第6期32卷 1230-1238页

作者： Chen, Junting Lau, Vincent K. N. Hong Kong Univ Sci & Technol Dept Elect & Comp Engn Kowloon Hong Kong Peoples R China

Massive MIMO is a promising technology in future wireless communication networks. However, it raises a lot of implementation challenges, for example, the huge pilot symbols and feedback overhead, requirement of real-time global CSI, large number of RF chains needed, and high computational complexity. We consider a two-tier precoding strategy for multi-cell massive MIMO interference networks, with an outer precoder for inter-cell/inter-cluster interference cancellation, and an inner precoder for intra-cell multiplexing. In particular, to combat with the computational complexity issue for the outer precoding, we propose a low complexity online iterative algorithm to track the outer precoder under time-varying channels. We follow an optimization technique and formulate the problem on the Grassmann manifold. We develop a low complexity iterative algorithm, which converges to the global optimal solution under static channels. In time-varying channels, we propose a compensation technique to offset the variation of the time-varying optimal solution. We show with our theoretical result that, under some mild conditions, perfect tracking of the target outer precoder using the proposed algorithm is possible. Numerical results demonstrate that the two-tier precoding with the proposed iterative compensation algorithm can achieve a good performance with a significant complexity reduction compared with the conventional two-tier precoding techniques in the literature.

关键词： Massive MIMO two-tier precoding tracking algorithm optimization Grassmann manifold

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An objective global climatology of polar lows based on reanalysis data

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QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY 2018年第716期144卷 2099-2117页

作者： Stoll, Patrick J. Graversen, Rune G. Noer, Gunnar Hodges, Kevin Arctic Univ Norway Tromso Norway Norwegian Meteorol Inst Tromso Norway Univ Reading Dept Meteorol Reading Berks England

Here we present an objective global climatology of polar lows. In order to obtain objective detection criteria, the efficacy of several parameters for separating polar lows from other cyclones has been compared. The comparison and the climatology are based on the ERA-Interim reanalysis from 1979 to 2016 and the high-resolution Arctic System Reanalysis from 2000 to 2012. The most effective parameters in separating polar lows from other extratropical cyclones were found to be the difference between the sea-level pressure at the centre of the low and its surroundings, the difference in the potential temperature between the sea surface and the 500 hPa level, and the tropopause wind speed poleward of the system. Other parameters often used to identify polar lows, such as the 10 m wind speed and the temperature difference between the sea surface and the 700 hPa level, were found to be less effective. The climatologies reveal that polar lows occur in all marine basins at high latitudes, but with high occurrence density in the vicinity of the sea-ice edge and coastal zones. The regions showing the highest degree of polar-low activity are the Denmark Strait and the Nordic Seas, especially for the most intense polar lows. In the North Atlantic and Pacific, the main polar-low season ranges from November to March. In the Southern Hemisphere, polar lows are mainly detected between 50 and 65 degrees S from April to October, indicating that this hemisphere compared to its northern counterpart has a two months longer, but less intense, polar-low season. No significant hemispheric long-term trends are observed, although some regions, such as the Denmark Strait and the Nordic Seas, experience significant downward and upward trends in polar lows, respectively, over the last decades. For intense polar lows, a significant declining trend has been observed for the Northern Hemisphere.

关键词： Arctic hurricane detection/identification criteria long-term trend mesoscale cyclone marine cold-air outbreak polar low tracking algorithm

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Improved control algorithm for grid-connected cascaded H-bridge photovoltaic inverters under asymmetric operating conditions

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IET POWER ELECTRONICS 2018年第3期11卷 407-415页

作者： Iman-Eini, Hossein Bacha, Seddik Frey, David Univ Tehran Sch Elect & Comp Engn Coll Engn Tehran Iran Univ Grenoble Alpes Grenoble Elect Engn Lab Grenoble France

Here, a single-stage cascaded H-bridge (CHB) inverter is presented for grid-connected photovoltaic (PV) systems. The CHB inverter has separate DC links and allows individual control of PV arrays. The conversion efficiency is high and the harmonic generation is lower than conventional PV inverters. Although the CHB inverter is a good candidate for injection of solar power into grid, its control issues have not been completely solved. One of the main challenges in the CHB inverter is the harmonic generation when the connected PV arrays to the H-bridge cells have different amounts of insolation. This study deals with the asymmetrical operating conditions of PV arrays (or H-bridge cells) in the CHB inverter and presents an analytical equation for determination of cells' modulation indices based on PV arrays data. Then, a control loop is added to the tracking algorithm of conventional control systems to determine whether an H-bridge cell is in the linear modulation or not. In the case of overmodulation, the corresponding DC link voltage is increased by the controller to bring it back to the linear region. The validity of new method is confirmed by simulations and experiments on a seven-level 1.7kW CHB inverter.

关键词： photovoltaic power systems invertors power grids harmonic generation power system harmonics solar power stations solar cell arrays insulation modulation power generation control improved control algorithm grid connected cascaded H-bridge photovoltaic inverter asymmetric operating condition single-stage CHB inverter PV array system harmonic generation PV inverter solar power injection H-bridge cell insulation tracking algorithm linear modulation overmodulation DC link voltage power 1 7 kW

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