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Asia Communications and Photonics Conference and Exhibition (ACP)

作者： Qianwu Zhang Yuntong Jiang Shuaihang Duan Zicong Wang Pu Li Bingyao Cao Yating Wu Key Laboratory of Specialty Optics and Optical Access Networks Shanghai Institute for Advanced Communication and Data Science Shanghai University Taiyuan China Key Laboratory of Advanced Transducers and Intelligent Control System Taiyuan University of Technology Ministry of Education Taiyuan China

A light gradient boosting machine improved-MLSE equalizer for 50Gb/s PAM4 IM-DD PON with 10G class optical transceivers is proposed and experimental results show that 21 dB power budget is achieved over 15km SSMF. ... 详细信息

ISBN: (数字)9781943580828

ISBN: (纸本)9781728176567

关键词： Maximum likelihood estimation Equalizers Boosting Transceivers Optical fiber communication Passive optical networks Photonics

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Point cloud reconstruction and volume measurement method for dynamic bulk material flow

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Measurement 2025年 254卷

作者： Chengcheng Hou Yongfei Kang Wei Qiao Huijie Dong Tiezhu Qiao College of Physics and Optoelectronics Engineering Taiyuan University of Technology Taiyuan 030024 China Key Laboratory of Advanced Transducers and Intelligent Control System Ministry of Education Taiyuan University of Technology Taiyuan 030024 China China Energy Baotou Energy Co. Ltd. Baotou 014000 China College of Mechanical and Vehicle Engineering Taiyuan University of Technology Taiyuan 030024 China

Accurate volume measurement of bulk material flow on belt conveyors is a key technology and prerequisite for energy-saving control and safe operation of transportation systems. This paper presents a novel method for dynamic volume measurement of bulk material flow based on point cloud reconstruction. The proposed method comprises three main components: bulk material flow area segmentation using an enhanced PointNet++ network with multi-scale feature extraction capabilities, three-dimensional reconstruction using the α-shape algorithm to construct complete enclosed point cloud spaces, and volume calculation based on Delaunay triangulation. Experimental validation on a laboratory-scale platform demonstrated that our method maintains robust performance across varying bulk material volumes and running speeds, with an average volume measurement accuracy exceeding 97 %. The method shows particular effectiveness in industrial transportation scenarios with non-uniform loading and variable speeds.

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An Improved Volterra Nonlinear Equalizer for 50 Gb/s PAM4 IM/DD Transmission with 10G-Class Optics

An Improved Volterra Nonlinear Equalizer for 50 Gb/s PAM4 IM...

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Asia Communications and Photonics Conference and Exhibition (ACP)

作者： Qianwu Zhang Shuaihang Duan Zicong Wang Yuntong Jiang Pu Li Bingyao Cao Yating Wu Key Laboratory of Specialty Fiber Optics and Optical Access Networks Shanghai Institute for Advanced Communication and Data Science Shanghai University Shanghai China Key Laboratory of Advanced Transducers and Intelligent Control System Ministry of Education Taiyuan University of Technology Taiyuan China

An improved Volterra nonlinear equalizer (VNLE) for 50 Gb/s PAM4 IM/DD Transmission with 10G-Class optics is experimentally demonstrated and show >2 dB sensitivity improvement compared to the 3 rd -order VNLE and s... 详细信息

ISBN: (数字)9781943580828

ISBN: (纸本)9781728176567

关键词： Optical fibers Sensitivity Equalizers Optics Optical fiber communication Encoding Photonics

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controllable optical bistability in a three-mode optomechanical system with a membrane resonator

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Chinese Physics B 2018年第7期27卷 382-387页

作者： Jiakai Yan Xiaofei Zhu Bin Chen Department of Physics College of Physics and OptoelectronicsTaiyuan University of TechnologyTaiyuan 030024Chin Key Lab of Advanced Transducers and Intelligent Control System Ministry of Education and Shanxi ProvinceTaiyuan 030024China

We study the optical bistability （OB） in a three-mode cavity optomechanical system, where an oscillating membrane of perfect reflection is inserted between two fixed mirrors of partial transmission. By investigating the behavior of steady state solutions, we find that the left and right cavities will exhibit the bistable behavior simultaneously in this optomechanical system by adjusting the left and right coupling fields. In addition, one can control the OB threshold and the width of the OB curve via adjusting the coupling strength, the detuning, and the decay rate. Moreover, we further illustrate the OB appearing in the cavity by the effective potential as a function of the position.

关键词： optical bistability oscillating membrane optomechanical system

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An improved particle swarm optimization particle filter algorithm based on harmony search

An improved particle swarm optimization particle filter algo...

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第三十九届中国控制会议

作者： Zhen-dong Liu Yi-ming Fang Le Liu Xiao-dong Zhao Key Lab of Industrial Computer Control Engineering of Hebei Province Yanshan University Research Center of the Ministry of Education for Intelligent Control System and Intelligent Equipment Yanshan University

In light of the problems that particle filter based on particle swarm optimization（PSO-PF） algorithm is easy to fall into the local optimum in the state estimation of complex nonlinear systems, an improved particle swarm optimization particle filter algorithm based on harmony search（HSPSO-PF） is proposed. The optimal value of each individual in the particle swarm algorithm is equivalent to a variable in the harmony memory（HM） in the harmony search algorithm. On the one hand, the idea of generating solutions in harmony search algorithm is used to update the matrix that is composed of particles’ optimal solutions in the iteration of PSO. And the harmony memory consideration rate is adjusted to ensure that the source of solution generation is not limited to the HM, so that the PSO can search for the global optimal solution. On the other hand, the pitch adjustment rate and the fine-tuning bandwidth are adjusted to improve the local search ability of the PSO. Simulation results under Gaussian and non-Gaussian show that HSPSO-PF can effectively improve the estimation accuracy of the particle filtering algorithm, and has extensive adaptability.

关键词： Particle filter Harmony search Particle swarm optimization

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Utility-Oriented Underwater Image Quality Assessment Based on Transfer Learning

arXiv

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arXiv 2022年

作者： Chen, Weiling Lin, Rongfu Liao, Honggang Zhao, Tiesong Gu, Ke Le Callet, Patrick Fujian Key Lab for Intelligent Processing and Wireless Transmission of Media Information Fuzhou University Fuzhou350108 China Peng Cheng Laboratory Shenzhen518000 China The Faculty of Information Technology Beijing University of Technology Engineering Research Center of Intelligent Perception and Autonomous Control Ministry of Education Beijing Key Laboratory of Computational Intelligence and Intelligent System Beijing Artificial Intelligence Institute Beijing100124 China Équipe Image Perception et Interaction Laboratoire des Sciences du Numérique de Nantes Université de Nantes France

The widespread image applications have greatly promoted the vision-based tasks, in which the Image Quality Assessment (IQA) technique has become an increasingly significant issue. For user enjoyment in multimedia systems, the IQA exploits image fidelity and aesthetics to characterize user experience;while for other tasks such as popular object recognition, there exists a low correlation between utilities and perceptions. In such cases, the fidelity-based and aesthetics-based IQA methods cannot be directly applied. To address this issue, this paper proposes a utility-oriented IQA in object recognition. In particular, we initialize our research in the scenario of underwater fish detection, which is a critical task that has not yet been perfectly addressed. Based on this task, we build an Underwater Image Utility Database (UIUD) and a learning-based Underwater Image Utility Measure (UIUM). Inspired by the top-down design of fidelity-based IQA, we exploit the deep models of object recognition and transfer their features to our UIUM. Experiments validate that the proposed transfer-learning-based UIUM achieves promising performance in the recognition task. We envision our research provides insights to bridge the researches of IQA and computer vision. Copyright © 2022, The Authors. All rights reserved.

关键词： Multimedia systems

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Flat-band Line states in Photonic Kagome Lattices

Flat-band Line states in Photonic Kagome Lattices

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第9届纳米操纵、制造与测量国际会议

作者： Xianglian Liu Key Laboratory of Advanced Transducers and Intelligent Control System Ministry of EducationTaiyuan University of TechnologyChina

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Integral Sliding Mode control for PMSM with Uncertainties and Disturbances via Nonlinear Disturbance Observer

Integral Sliding Mode Control for PMSM with Uncertainties an...

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Chinese control Conference (CCC)

作者： Jianxiong Li Hongmei Ren Songhua Wang Yiming Fang Research Center of the Ministry of Education for Intelligent Control System and Intelligent Equipment Yanshan University Qinhuangdao China The Key Lab of Industrial Computer Control Engineering of Yanshan University Qinhuangdao China

ISBN: (数字)9789881563903

ISBN: (纸本)9781728165233

In this paper, a nonlinear disturbance observer-based (NDOB) integral sliding mode control (SMC) algorithm is proposed for speed control of permanent magnet synchronous motor (PMSM) in the presence of uncertain parameters and external time-varying load toque. Firstly, three nonlinear disturbance observers (NDOs) are constructed to estimate the lumped disturbances comprising of uncertain parameters and/or disturbances in speed loop and two current loops, respectively. Secondly, an integral sliding mode controller is developed based on the NDOs. It can be proved that the resulting closed loop system is asymptotically stable and the speed tracking error converges to zero asymptotically in theory. Finally, experiment results are given to validate the proposed control method.

关键词： Torque Disturbance observers Sliding mode control Uncertainty Velocity control Mathematical model Upper bound

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Fast all-optical random number generator

arXiv

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arXiv 2022年

作者： Zhao, Jiamin Li, Pu Zhang, Xing Gao, Zhensen Jia, Zhiwei Bogris, Adonis Alan Shore, K. Wang, Yuncai Key Laboratory of Advanced Transducers and Intelligent Control System Ministry of Education Taiyuan University of Technology Taiyuan030024 China School of Information Engineering Guangdong University of Technology Guangzhou510006 China Guangdong Provincial Key Laboratory of Photonics Information Technology Guangzhou510006 China Key Laboratory of Specialty Fiber Optics and Optical Access Networks Shanghai University Shanghai200444 China Changchun Institute of Optics Fine Mechanics and Physics Chinese Academy of Sciences Changchun130033 China Department of Informatics and Computer Engineering University of West Attica Athens12243 Greece School of Electronic Engineering Bangor University WalesLL57 1UT United Kingdom

We propose a simple and all-optical method for fast random number generation based on the laser mode hopping. Through periodically restarting a two-mode laser operating in the bistable state, a random number stream can be generated due to the spontaneous emission noise. To validate the feasibility of this method, we perform a theoretical simulation using the common vertical-cavity surface-emitting laser (VCSEL) with two polarization modes. Numerical results demonstrate that fast 2.5 Gb/s random number streams can be continuously obtained with verified randomness. This scheme provide a fully monolithic solution for random number generator, due to its simple and all-optical structure. Copyright © 2022, The Authors. All rights reserved.

关键词： Random number generation

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Large-range Dynamic Strain Measurement Using Chaotic BOCDA

Large-range Dynamic Strain Measurement Using Chaotic BOCDA

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International Conference on Optical Communications and Networks (ICOCN)

作者： Yahui Wang Le Zhao Mingjiang Zhang Jianzhong Zhang Key Laboratory of Advanced Transducers and Intelligent Control System Ministry of Education Taiyuan University of Technology Taiyuan China

We propose and demonstrate a wide-range dynamic strain measurement system using single-slope assisted chaotic BOCDA. In SBS-based chaotic sensors, the linewidth of chaotic BGS is naturally broaden due to the multi-frequency pump wave. Thus, the linear section is provided a large dynamic range. This experiment is the first that a dynamic strain of 1200 με can be accurately identified using the single-slope assisted method, which is a significant improvement. The proposed method has a great demand potential in large-scale dynamic strain measurement.

关键词： Strain Strain measurement Frequency measurement Probes Scattering Optical fibers Chaotic communication

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