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DM Code Key Point Detection algorithm Based on CenterNet

Computers, Materials & Continua 2023年第11期77卷 1911-1928页

作者： Wei Wang Xinyao Tang Kai Zhou Chunhui Zhao Changfa Liu School of Information Engineering Chang’an UniversityXi’an710018China Algorithm Research and Development Department GRGBanking Equipment Co.Ltd.Guangzhou510663China Research and Development Department Xi’an Soar Electromechanical TechnologyLtd.Xi’an710043China

Data Matrix(DM)codes have been widely used in industrial *** reading of DM code usually includes positioning and *** positioning is a prerequisite for successful *** image processing methods have poor adaptability to pollution and complex *** deep learning-based methods can automatically extract features,the bounding boxes cannot entirely fit the contour of the *** image processing methods are required for precise positioning,which will reduce *** of the above problems,a CenterNet-based DM code key point detection network is proposed,which can directly obtain the four key points of the DM *** with the existing methods,the degree of fitness is higher,which is conducive to direct *** further improve the positioning accuracy,an enhanced loss function is designed,including DM code key point heatmap loss,standard DM code projection loss,and polygon Intersection-over-Union(IoU)loss,which is beneficial for the network to learn the spatial geometric characteristics of DM *** experiment is carried out on the self-made DM code key point detection dataset,including pollution,complex background,small objects,etc.,which uses the Average Precision(AP)of the common object detection metric as the evaluation *** reaches 95.80%,and Frames Per Second(FPS)gets 88.12 on the test set of the proposed dataset,which can achieve real-time performance in practical applications.

关键词： DM code key point detection CenterNet object detection enhanced loss function

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Investigation and Comparison of 5G Channel Models: From Qua DRi Ga, NYUSIM,and MG5G Perspectives

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Chinese Journal of Electronics 2022年第1期31卷 1-17页

作者： PANG Lihua ZHANG Jin ZHANG Yang HUANG Xinyi CHEN Yijian LI Jiandong School of Communication and Information Engineering Xi'an University of Science and Technology State Key Laboratory of Integrated Service Networks Xidian University National Mobile Communications Research Laboratory Southeast University Algorithm Department ZTE Corporation

This paper investigates and compares three channel models for the fifth generation(5 G) wireless communications: the quasi deterministic radio channel generator(Qua DRi Ga), the NYUSIM channel simulator model developed by New York University, and the more general 5 G(MG5 G) channel model. First, the characteristics of the modeling processes of the three models are introduced from the perspective of model ***, the small-scale parameter modeling strategies of the three models are compared from space/time/frequency domains as well as polarization aspect. In particular, the drifting of small-scale parameters is introduced in ***, through the simulation results of angular power spectrum, Doppler power spectrum density, temporal autocorrelation function, power delay profile, frequency correlation function, channel capacity, and eigenvalue distribution, the three models are comprehensively investigated. According to the simulation results, we clearly analyze the impact of the modeling strategy on the three channel models and give certain evaluations and suggestion which lay a solid foundation for link and system-level simulations for 5 G transmission algorithms.

关键词： model framework MG5G Perspectives quasideterministic radio channel generator channel capacity QuaDRiGa fifth generation wireless communications general 5G channel model 5G transmission algorithms wireless channels NYUSIM channel simulator model frequency correlation function 5G mobile communication power delay profile eigenvalue distribution eigenvalues and eigenfunctions channel models temporal autocorrelation function small-scale parameter angular power spectrum Doppler power spectrum density

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Deterministic and Stochastic Simulators for Non-Isotropic V2V-MIMO Wideband Channels

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China Communications 2018年第7期15卷 18-29页

作者： Yiran Li Xiang Cheng Nan Zhang State Key Laboratory of Advanced Optical Communication Systems and Networks School of Electronics Engineering and Computer Science Peking University Wireless Algorithm Department Product Research and Development System ZTE Corporation

In this paper, we consider a novel two-dimensional(2D) geometry-based stochastic model(GBSM) for multiple-input multiple-output(MIMO) vehicle-to-vehicle(V2V) wideband fading channels. The proposed model employs the combination of a two-ring model and a multiple confocal ellipses model, where the signal is sum of the line-of-sight(Lo S) component, single-bounced(SB) rays, and double-bounced(DB) rays. Based on the reference model, we derive some expressions of channel statistical properties, including space-time correlation function(STCF), Doppler spectral power density(DPSD), envelope level crossing rate(LCR) and average fade duration(AFD). In addition, corresponding deterministic and stochastic simulation models are developed based on the reference model. Moreover, we compare the statistical properties of the reference model and the two simulation models in different scenarios and investigate the impact of different vehicular traffic densities(VTDs) on the channel statistical properties of the proposed model. Finally, the great agreement between simulation models and the reference model demonstrates not only the utility of simulation models, but also the correctness of theoretical derivations and simulations.

关键词： vehicle-to-vehicle wideband channels simulation model statistical properties

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Comparison of methods for allocating costs of empty railcar movements in a railcar pooling system

Comparison of methods for allocating costs of empty railcar ...

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作者： Cheng, Yao Lin, Wei-Hua Advanced Traffic and Logistics Algorithm Systems Research Center Department of Systems and Industrial Engineering University of Arizona Tucson AZ 85721 United States

Allocating the cost of empty railcar miles to partners in a railcar pooling system is an important pricing problem in railway management. Recently, the authors of this paper proposed a cost allocation scheme for empty railcar movements based on game theory that explicitly considers the level of participation and contribution from each partner, the costs generated before and after cooperation, and the overall benefit obtained by each partner because of cooperation. This paper compares the performance of the model with three other cost allocation models with respect to fairness, stability, and computational efficiency. The comparison is made with two scenarios adapted from examples documented in the literature. The results indicate that the cost allocation scheme based on game theory outperforms other methods in ensuring fairness and enhancing stability in a coalition. Most remarkably, it yields reasonable results even in situations in which other models behave poorly. Computationally, it is manageable for practical problems.

关键词： Railroad cars

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Field Trial of End-to-end Management and Control of Semiactive WDM System for 5G Centralized Front-haul Network

Field Trial of End-to-end Management and Control of Semiacti...

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2023 Optical Fiber Communications Conference and Exhibition, OFC 2023

作者： Zhao, Yang Sun, Jiang Zheng, Haomian Yu, Chaode Wang, Dong Cai, Qian Li, Yunbo Han, Liuyan Zhang, Dechao Li, Han China Mobile Research Institute Department of Network and It Technology Beijing100053 China Huawei Technologies Co. Ltd Optical System & Algorithm Development Department Wuhan430223 China

A novel management and control architecture and abstract model of semi-active WDM system for 5G front-haul network are proposed. The functions of device information acquisition, alarm monitoring and fault location is ... 详细信息

ISBN: (纸本)9781957171180

关键词： 5G mobile communication systems

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Field Trial of a New Metropolitan WDM Architecture and Flexible Scheduling based on Optical Layer OAM

Field Trial of a New Metropolitan WDM Architecture and Flexi...

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2024 Asia Communications and Photonics Conference, ACP 2024 and International Conference on Information Photonics and Optical Communications, IPOC 2024

作者： Zhao, Yang Liu, Yucong Li, Xiang Wang, Dong Hu, Changbin Zhang, Dechao Department of Fundamental Network Technology China Mobile Research Institute Beijing China Optical System & Algorithm Development Department Huawei Technologies Co. Ltd. Wuhan China

A novel wavelength pooling technology and a flexible scheduling method based on optical layer OAM (O-OAM) are proposed. Costs of network construction and maintenance are reduced significantly, and service latency is r... 详细信息

ISBN: (纸本)9798350379266

关键词： Centralized Control Metropolitan Transport Network Optical Layer OAM Wavelength Pooling

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BLOCK ITERATIVE METHODS FOR ONE DIMENSIONAL NONLINEAR BIHARMONIC PROBLEMS ON A PARALLEL COMPUTER*

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Parallel algorithms and Applications. 1999年第3期13卷 239-263页

作者： R.K. MOHANTY D.J. EVANS [a] Department of Computer Studies Parallel Algorithm Research Centre Loughborough University Leicestershire UK

In this article, we propose new difference methods of order two and four using three grid points in a coupled manner for solving the one dimensional nonlinear biharmonic problems with specified boundary conditions at the end points. The resulting matrix system is solved by the block iterative methods on a parallel computer. Derivatives of the solution are obtained as a by-product of the methods. Numerical examples are provided to demonstrate the efficiency and accuracy of the methods on both sequential and parallel computations.

关键词： Biharmonic problems Finite difference method Block iterative methods NBSOR method BSOR method Parallel computations

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Deep transfer learning via minimum enclosing balls 25th

Deep transfer learning via minimum enclosing balls

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25th International Conference on Neural Information Processing, ICONIP 2018

作者： Deng, Zhilong Liu, Fan Zhao, Jiangjiang Wei, Qiang Pang, Shaoning Leng, Yue Algorithm Group Research and Development Department Online Services of China Mobile Beijing China Artificial Intelligence Lab Meituan-Dianping Group Beijing China Department of Computing Unitec Institute of Technology Private Bag 92025 Auckland1142 New Zealand Algorithm Group Artificial Intelligence Lab Emotibot Technologies Limited Beijing China

ISBN: (纸本)9783030041816

Training of deep learning algorithms such as CNN, LSTM, or GRU often requires large amount of data. However in real world applications, the amount of data especially labelled data is limited. To address this challenge, we study Deep Transfer Learning (DTL) in the context of Multitasking Learning (MTL) to extract sharable knowledge from tasks and use it for related tasks. In this paper, we use Minimum Closed Ball (MEB) as a flexible knowledge representation method to map shared domain knowledge from primary task to secondary task in multitasking learning. The experiments provide both analytic and empirical results to show the effectiveness and robustness of the proposed MEB-based deep transfer learning. © Springer Nature Switzerland AG 2018.

关键词： Learning algorithms

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A Large Scale Extended algorithm for 2D Halton Points with Low-Discrepancy Sequences 3

A Large Scale Extended Algorithm for 2D Halton Points with L...

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3rd International Conference on Artificial Intelligence and Advanced Manufacture, AIAM 2021

作者： Chen, Wenxing Dai, Shuyang Zheng, Baojuan Wuhan University School of Mathematics and Statistics Wuhan430072 China Commercial Vehicle Technology Center of SAIC Motor Group Co. Ltd Department of Algorithm Research and Development Shanghai200433 China

ISBN: (纸本)9781665417327

Random discrete points have important application value in meshless PDE equation discretization, molecular dynamics simulation, point cloud imaging and so on. There are many common methods to generate random points, such as Monte Carlo, Gibbs Sampling, and Hammersley series and etc. But Halton random point algorithm has a defect that it only generates discrete points in [0, 1]2 region. However, in practical applications, it is necessary to be able to generate discrete points on any area. This paper proposed a new Halton points extension algorithm to solve this defects. We defined a linear operator which can transform discrete points from [0, 1]2 region into any plane region. Two examples are given, the extension algorithm respectively includes square, rectangular and polar coordinates region. The numerical results show that our method is accurate, effective and more general, it also enhanced the application range by our method. © 2021 IEEE.

关键词： Molecular dynamics

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The Control Principle and Mathematical Model of Intelligent Solar Panels

The Control Principle and Mathematical Model of Intelligent ...

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2021 International Conference on Robotics Automation and Intelligent Control, ICRAIC 2021

作者： Chen, Wenxing Dai, Shuyang Zheng, Baojuan Tang, Zhuyan Lin, Hao School of Mathematics and Statistics Wuhan University Wuhan430072 China Department of Algorithm Research and Development Commerical Vehicle Technology Center SAIC Motor Group Co.Ltd Shanghai200433 China

Energy is an important material that promotes social development and maintains human life. Clean energy has become a scientific research theme of open world which appeal to many scientists to research it. This paper inspired by the experience of sunflower growth. So we proposed a mathematical model for automatic adjustment of the maximum luminous flux for a limited solar panel, which can help to adjust the best light position. The physical model added to the light detector in the practical application, real-time comparison of the difference in illumination at different positions to adjust the direction of solar panel, thereby enhancing the utilization of light energy. In addition, in order to save space and prevent severe weather attacks, we designed a autofolding circle disc and retractable rectangular solar panels. The intelligent system judgement and decision making based on the electrical signals fed back by the wind sensor or the vibration sensor. When the wind speed reaches the threshold, it can be folded or contracted automatically, reducing manual maintenance. The fully automatic solar panels are designed in this paper, the research results show that theis model has a high utilization, strong sensitivity, safety and durability, and easy control. This is also a process of theoretical exploration of interdisciplinary services for the energy system. © 2022 Institute of Physics Publishing. All rights reserved.

关键词： Solar energy

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