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IEEE Vehicular Technology Conference

作者： Rui Wang Olivier Renaudin Ricardo M. Bernas Andreas F. Molisch Ming Hsieh Dept. of Electr. Eng. Univ. of Southern California Los Angeles CA USA

ISBN: (纸本)9781479980925

This paper revisits estimation and tracking of channel parameters of multiple-input multiple-output (MIMO) systems. Since the initialization of channel parameters has always been regarded as a computationally complex problem, we develop a new parameter initialization method that exploits the nature of the data structure of channel measurements. For medium or large problems it leads to a more than 500 times runtime acceleration for parameter initialization. We show that the runtime of the new initialization method increases more slowly compared with that of the traditional initialization method when the dimensions of measurement data or search grids grow.

关键词： Efficiency Improvement Path Detection tracking algorithm initialization time-varying channels Runtime multiple input multiple output systems channel measurement tracking measurement data

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Infrared Moving Target tracking algorithm with Background Perception Capability

Infrared Moving Target Tracking Algorithm with Background Pe...

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2014 4th IEEE International Conference on Information Science and Technology

作者： Liu Shijian Yang Long Wu Yingyue Institute of Technical Physics Chinese Academy of Sciences

Infrared moving target tracking algorithm in complex background prone target loss problems, proposed to add background perception module and target feature matching function in tracking algorithm, real-time analysis of the surroundings of the target. Strict constraints target infrared feature matching function when found that the background will be changed, if the target is interference, and outputs the target predicted position until the target flight out of the area. The improved algorithm is substantially independent of the target size, rotation change and improves the stability and reliability of the tracking algorithm. The experimental results show that the improved algorithm to overcome easily lost in the traditional algorithm to track the target and stable tracking in a complex background.

关键词： Background perception moving target tracking algorithm

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Research and Application of Moving Target tracking algorithm Based on Computer Vision

Research and Application of Moving Target Tracking Algorithm...

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2019 7th International Conference on Machinery,Materials and Computing Technology(ICMMCT 2019)

作者： Dong Fei Shaanxi Railway Institute

Computer vision technology has developed rapidly in the current computer world,and the processing methods for video images have also been significantly *** on the computer theory based on Marr,this paper discusses and studies the tracking of moving objects in *** the motion change of the monitored vehicle as an example,the Robert algorithm is used to track the changes of the vehicle during driving,and the multi-association template matching method is used to improve the accuracy of the *** is proved in the experiment that the algorithm in this paper has better precision in the tracking of the vehicle and can meet the current needs for tracking the moving target.

关键词： tracking algorithm image segmentation algorithm machine vision

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tracking Deadtime algorithm for GaN DC/DC Converter 24

Tracking Deadtime Algorithm for GaN DC/DC Converter

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24th International Conference on Applied Electronics (AE)

作者： Skarolek, Pavel Lettl, Jiri Czech Tech Univ Fac Elect Engn Dept Elect Drives & Tract Tech 2 Prague 16627 Czech Republic

ISBN: (纸本)9788026108122

The presented method automatically adjusts the deadtime of gallium nitride (GaN) transistors in half-bridge to increase the efficiency. This removes the need of manual measuring and setting the deadtime of the finished converter. The developed algorithm was tested and compared with the fixed deadtime case. The obtained results show that the developed algorithm is achieving higher and more stable efficiency compared to selected fixed deadtime.

关键词： GaN transistor deadtime tracking algorithm DC/DC converter

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Maneuvering target model and adaptive tracking algorithm

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Dianzi Yu Xinxi Xuebao/Journal of Electronics and Information Technology 2004年第6期26卷 966-970页

作者： Li, Hong-Yan Feng, Xin-Xi Wang, Fang Air Force Eng. Univ. Xi'an 710077 China

A maneuvering target model is presented based on the current statistics model. An adaptive tracking algorithm is developed using the relationship between the variance. Simulation results show that this new maneuvering target model can characterize all kinds of maneuvering motion of target and that the adaptive tracking algorithm has good performance. So it is worthy to be applied widely in practice.

关键词： Maneuvering target model tracking algorithm

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A Novel tracking algorithm for BOC(n,n) Signals

A Novel Tracking Algorithm for BOC(n,n) Signals

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International Conference on Consumer Electronics, Communications and Networks

作者： Xianxu Li Qing Chang School of electronic and information engineering of Beihang University

ISBN: (纸本)9781457714146

It is well known that Binary Offset Carrier (BOC) modulated signal has been chosen for the next generation satellite navigation system. The work presented in this paper introduces an improved novel architecture for the tracking loop which is tailored for the alignment of a BOC(1,1) modulated signal. Compared with the architecture described in [1], the proposed one here is able to double tracking accuracy and keeping the overall complexity of the required taps. An unambiguous time-based algorithm for discriminator is introduced in this paper which makes this architecture more realistic.

关键词： BOC Code tracking loop tracking algorithm

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tracking algorithms for the active target MAYA

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NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT 2011年第1期638卷 134-142页

作者： Roger, T. Caamano, M. Demonchy, C. E. Mittig, W. Savajols, H. Tanihata, I. Katholieke Univ Leuven Inst Kern Stralingsfys B-3001 Louvain Belgium GANIL F-14076 Caen 05 France Univ Santiago de Compostela E-15786 Santiago Spain Univ Bordeaux 1 CNRS IN2P3 CENBG F-33175 Gradignan France MSU NSCL E Lansing MI 48824 USA Osaka Univ RCNP Osaka 5670047 Japan

The MAYA detector is a Time-Charge Projection Chamber based on the concept of active target. These type of devices use a part of the detection system, the filling gas in this case, in the role of the reaction target. The MAYA detector performs three-dimensional tracking, in order to determine physical observables of the reactions occurring inside the detector. The reconstruction algorithms of the tracking use the information from a two-dimensional projection on the segmented cathode, and, in general, they need to be adapted for the different experimental settings of the detector. This work presents some of the most relevant solutions developed for the MAYA detector. (C) 2011 Elsevier B.V. All rights reserved.

关键词： Active target Gaseous detector Trajectory reconstruction tracking algorithm Simulation

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A new marching ridges algorithm for crack path tracking in regularized media

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INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES 2015年 71卷 57-69页

作者： Feld-Payet, S. Chiaruttini, V. Besson, J. Feyel, F. Onera French Aerosp Lab F-92322 Chatillon France Mines ParisTech Ctr Mat CNRS UMR 7633 F-91003 Evry France Safran SA Safran Tech Etab Paris Saclay F-78772 Magny Les Hameaux France

tracking algorithms are used to predict crack paths in structures modeled with the finite element method, in such a way that the paths do not depend on the selected mesh. For regularized media, the simplest methods rely on scalar variables, somehow related to material degradation. Despite their simplicity, they suffer from a major limitation: they allow the crack to initiate and propagate in only one direction. Consequently, such approaches usually fail in case of crack branching or crack initiation inside the structure. To overcome this difficulty, we propose a new crack path tracking algorithm. It is designed to simultaneously detect several local maxima of a degradation-related variable by following the associated ridge lines. That is why the algorithm proposed in this paper could be referred to as a marching ridges algorithm. The performance of the proposed approach is illustrated by three numerical examples within different frameworks. The first ones show that the algorithm can be used to insert crack increments during a ductile failure computation with a quasi-static implicit resolution procedure, in 2D and 3D. The last example proves that the algorithm can be used as a post-processing tool to capture dynamic crack branching from a damage distribution image only. (C) 2015 Elsevier Ltd. All rights reserved.

关键词： tracking algorithm Crack propagation Strain localization Quasi-static ductile failure Dynamic crack branching

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An algorithm based on incompatible modes for the global tracking of strong discontinuities in shear localization analyses

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COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING 2018年 330卷 33-63页

作者： Alsahly, Abdullah Callari, Carlo Meschke, Guenther Ruhr Univ Bochum Inst Struct Mech Bochum Germany Univ Molise DiBT Via De Sanctis I-86100 Campobasso Italy

Numerical methods for predicting localized shear failure in elasto-plastic solids have experienced considerable advancements in the last decades. Among these approaches, the so-called "Embedded Strong Discontinuity (ESD)" method is often successfully used to accurately simulate the post-localization response with negligible dependence on the finite element discretization. However, it was observed that the employed discontinuity tracking strategy plays a crucial role in the successful localization analysis. In this contribution, we propose a novel strategy for the global tracking of discontinuity surfaces. It is based on exploiting information obtained from the enhanced parameters employed in Enhanced Assumed Strain (EAS) formulations. It is well known, that enhanced strain element formulations are able to better capture localized shear deformations as compared to standard finite elements. This can be explained as a consequence of the improved performance in bending. We observed, that the approximation of the strain jumps delimiting the shear band is connected with a deformation field characterized by opposite bending curvatures across these two discontinuities. Hence, in view of the relations existing between the kinematics of strong and weak discontinuities, we formulate a proper scalar function of the enhanced parameters to identify potential strong discontinuity surfaces, which are evaluated in each step of the analysis with negligible computational cost. This proposed approach has a global character, as it is based upon evaluating discontinuity surfaces defined in the complete analysis domain that are, by construction, continuous across elements. We demonstrate that the tracking algorithm correctly identifies the potential strong discontinuity surface already in early loading stages, even before a localization condition is fulfilled. In those elements which are crossed by the potential failure surface and which also satisfy the localization condition, the kinema

关键词： Strain localization tracking algorithm Strong discontinuities Enhanced assumed strain Finite element method Shear band

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Target tracking approach via quantum genetic algorithm

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IET COMPUTER VISION 2018年第3期12卷 241-251页

作者： Jin, Zefenfen Hou, Zhiqiang Yu, Wangsheng Wang, Xin Air Force Engn Univ Informat & Nav Coll Xian 710077 Shaanxi Peoples R China

Aiming at an efficient feature match and similarity search in visual tracking, this study proposes a tracking algorithm based on quantum genetic algorithm. Therein, the global optimisation ability of quantum genetic algorithm is utilised. In the framework of quantum genetic algorithm, the positions of pixels are taken as individuals in population, while scale-invariant feature transform and colour features are taken as target model. Via defining the objective function, individual's fitness values can be measured. Visual tracking is realised when the pixel point with the biggest fitness value is searched and its corresponding position is returned. The experiment results show that the tracking algorithm the authors proposed performs more efficiently when it is compared with the state-of-the-art tracking algorithms.

关键词： genetic algorithms target tracking image colour analysis transforms feature extraction search problems target tracking approach quantum genetic algorithm feature match visual tracking similarity search tracking algorithm pixel position scale-invariant feature transform colour features

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