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基于虚拟仿真技术的变压器实验教学实践与探索

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三峡高教研究 2024年第1期 29-34页

作者：陈臻炜谭泽富蔡黎代妮娜重庆三峡学院电子与信息工程学院重庆万州404120

本研究聚焦于虚拟仿真技术在变压器实验教学中的应用,旨在探索教学改革的新路径。通过分析传统实验教学的局限性、存在的问题和面临的挑战,阐述了虚拟仿真技术的特点和优势,为提升教学效果,促进虚拟仿真与变压器实验的有机融合,开展了... 详细信息

本研究聚焦于虚拟仿真技术在变压器实验教学中的应用,旨在探索教学改革的新路径。通过分析传统实验教学的局限性、存在的问题和面临的挑战,阐述了虚拟仿真技术的特点和优势,为提升教学效果,促进虚拟仿真与变压器实验的有机融合,开展了“准备-漫游-探学-通关”的“交互式”创新实验操作、课程评价体系。同时,通过实际案例展示了教学改革的实践过程和效果。研究结果表明,虚拟仿真技术有效提高了学生的学习兴趣和实践能力,充分激发了学生主动学习兴趣,探索实验和独立解决实验问题的能力,也丰富了有机实验教学的内容,为教学改革提供了新的思路和方法。

关键词：虚拟仿真技术变压器实验教学改革

OFDMA-PON with MQAM downlink for flexible allocation

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Journal of Systems Engineering and Electronics 2019年第6期30卷 1090-1095页

作者： HE Chao WANG Ruyan tan zefu tan Xiang’an Key Laboratory of Ubiquitous Sensing and Networking in Chongqing Chongqing University of Posts and TelecommunicationsChongqing 400065China School of Communication and Information Engineering Chongqing University of Posts and TelecommunicationsChongqing 400065China Key Laboratory of Signal and Information Processing Chongqing Three Gorges UniversityChongqing 404100China Operation&Maintenance Department of Wanzhou Branch China UnicornChongqing 404100China

In this paper, the 40-Gbps orthogonal frequency division multiple access(OFDMA) technology enabled by subcarrier allocation in the form of integrated architecture for the intra-cell is proposed in the downlink transmission passive broadband optical access system. The data-carrying subcarriers in the inverse fast Fourier transform/fast Fourier transform(IFFT/FFT) size of1 024 points are successfully divided into three sub-channels,in which each sub-channel has 256 useful subcarriers, by using adaptive dynamic bandwidth allocation(DBA). Taking the inherent advantages of M-ary quadrature amplitude modulation(MQAM)modulation mechanism into account, the performance of the absolutely identical MQAM format over the different sub-channels for the downstream OFDMA-passive optical network(PON) is investigated based on the intensity modulation direct detection(IMDD) system by simulations. The results show that three parallel4 QAM or 16 QAM or 64 QAM OFDMA data, which are transmitted over three sub-channels, is more suitable for different sub-channel allocations, respectively. In addition, comparing with single port4/16/64 QAM OFDM over the same access system, the receiver sensitivity economizes – 0.6 d Bm, 0.6 d Bm, 4.6 d Bm at the bit error rate(BER) value of 10-3 respectively.

关键词： orthogonal frequency division multiple access(OFDMA) passive optical network(PON) downlink transmission dynamic bandwidth allocation(DBA).

Global classical solutions for 3D compressible magneto-micropolar fluids without resistivity and spin viscosity in a strip domain

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Science China Mathematics 2024年

作者： zefu Feng Guangyi Hong Changjiang Zhu School of Mathematical Sciences Chongqing Normal University School of Mathematics South China University of Technology

In this paper, we consider 3D compressible magneto-micropolar fluids without resistivity and spin viscosity in a strip domain. The prominent character of the governing model is the presence of the microstructure,a linear coupling structure involving derivatives of the velocity fields, which along with the lack of spin viscosity brings several challenges to the analysis. By exploiting the two-tier energy method developed in Guo and Tice(Arch Ration Mech Anal, 2013), we prove the global existence of classical solutions to the governing model around a uniform magnetic field that is non-parallel to the horizontal boundary. Moreover, we show that the solution converges to the steady state at an almost exponential rate as time goes to infinity. One of the main ingredients in our analysis, compared with previous works on micropolar fluids, is that we deal with the microstructure by establishing some delicate estimates based on the analysis of the div-curl decomposition, and the coupling between the fluid velocity and the vorticity of angular velocity.

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A Full-Duplex PON with Hybrid 64/16/4QAM OFDM Downlink and Hybrid 16/8/QPSK OFDM Uplink

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Optics and Photonics Journal 2016年第8期6卷 101-107页

作者： Chao He zefu tan Yufeng Shao Li Cai Yunle Zhu Hesheng Pu Sisi Huang College of Electronic & Information Engineering Chongqing Three Gorges University Chongqing China

In the context of next-generation optical access networks beyond 10 G, for high SE and flexible dynamic bandwidth allocation (DBA), the scheme of hybrid 64/16/4QAM-OFDM signal for downlink transmission and hybrid 16/8/QPSK-OFDM signal for uplink transmission is successfully proposed and experimentally presented in a full-duplex PON based on OFDM system. Here, for the uplink, in order to unit management of the optical line terminal (OLT) and reduce cost, the optical source functioned as the optical subcarrier at optical network units (ONUs) is from OLT in the central station. Moreover, there is an external cavity laser (ECL) with center frequency of 193.2 THz not only employed as optical modulated signal but also acted as LO signal. Our simulation results show that bit error ratio (BER) under hardware detection forward error correction has been successfully gained after 20 km of SSMF transmission. It is observed that the receiver sensitivity of multilevel PSK (M-PSK) is obviously larger than that of the M-QAM in this measurement scheme.

关键词： Passive Optical Network Digital Signal Processing Full-Duplex Hybrid Modulation Orthogonal Frequency Division Multiplexing

DP-DQPSK Optical Access System Integrated with Fiber and Free-Space Downlink for High Spectral Efficiency Application

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Optics and Photonics Journal 2016年第8期6卷 108-113页

作者： Yufeng Shao Fuping Chen Luo Chen Shilu Shen Anrong Wang Yingxiang Luo zefu tan College of Electronic and Information Engineering Chongqing Three Gorges University Chongqing China

In this letter, we present the generation, the balanced detection, and the transmission performance evaluation of dual polarization differential quadrature phase shift keying (DP-DQPSK) signals in optical access system integrated with fiber and free-space downlink. Polarization-multip- lexed (POLMUX) technique is introduced in the system for high spectral efficiency access utilization. 10 Gb/s DP-DQPSK downlink signals are successfully transmitted over 50 km SMF-28 and a 800 m wireless optical channel under the bad weather condition, such as fog and haze. The results show that the potentiality of DP-DQPSK optical access system is integrated with fiber and free- space downlink for providing flexible user access with high bandwidth efficiency.

关键词： Free-Space Optical Communication Optical Access System Phase Modulation Spectral Efficiency

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电动汽车BMS关键技术研究进展

电源技术 2022年第9期46卷 954-957页

作者：谭泽富彭涛代妮娜魏健邓立重庆三峡学院信息与信号处理重点实验室重庆404000

近年来国家大力发展新能源汽车,电池管理系统(BMS)作为关键技术之一,在电动汽车发展中起着关键作用。阐述了BMS关键技术的研究进展,介绍了电池均衡技术的分类,对电池荷电状态(SOC)估算方法的优缺点进行分析。论述了热管理系统的功能和分... 详细信息

近年来国家大力发展新能源汽车,电池管理系统(BMS)作为关键技术之一,在电动汽车发展中起着关键作用。阐述了BMS关键技术的研究进展,介绍了电池均衡技术的分类,对电池荷电状态(SOC)估算方法的优缺点进行分析。论述了热管理系统的功能和分类,详细介绍了基于相变材料(PCM)的热管理系统。简要介绍了国内BMS最新成果,并对BMS关键技术的发展进行展望。

关键词：电池管理系统电池均衡热管理 SOC估算

A complete reference genome assembly for foxtail millet and Setaria-db, a comprehensive database for Setaria

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Molecular Plant 2024年第2期17卷 219-222页

作者： Qiang He Chunchao Wang Qiang He Jun Zhang Hongkai Liang zefu Lui Kun Xie Sha tang Yuhan Zhou Bin Liu Hui Zhi Guanqing Jia Ganggang Guo Huilong Du Xianmin Diao State Key Laboratory of Crop Gene Resources and Breeding Institute of Crop SciencesChinese Academy of Agricultural SciencesBeijing 100081China School of Life Sciences Institute of Life Sciences and Green DevelopmentHebei UniversityBaoding 071000China State Key Laboratory of Rice Biology&Breeding Zhejang Provincial Key Laboratory of Crop GermplasmThe Advanced Seed InstituteZhejiang UniversityHangzhouChina

Dear Editor,,Foxtail millet(Setaria italica)and its wild ancestor green foxtail(***),are two C4 genetic model plants known for their desirable traits,such as small size,short life cycle,ease of transformation,and a compact genome size(~420 Mb)(He et al.,2023).Foxtail millet stands out as the only cultivated species within the Setaria *** a foundational crop for ancient east Asian agriculture civilization,it possesses remarkable drought and soil-nutrient deficiency tolerance.

关键词： comprehensive soil cultivated

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V2G应用进展综述

重庆理工大学学报（自然科学） 2023年第3期37卷 222-229页

作者：谭泽富周正洋高树坤蔡黎代妮娜重庆三峡学院电子与信息工程学院重庆404000

从电网与电动汽车用户2个角度出发,介绍了国内外V2G技术应用现状,分析了基于电网侧V2G技术带来的负面影响以及负荷预测的变化;阐述了激励电动汽车用户参与V2G的两大因素:一是分时电价,二是电池损耗,并提出了引导V2G的构想;探讨了未来EV... 详细信息

从电网与电动汽车用户2个角度出发,介绍了国内外V2G技术应用现状,分析了基于电网侧V2G技术带来的负面影响以及负荷预测的变化;阐述了激励电动汽车用户参与V2G的两大因素:一是分时电价,二是电池损耗,并提出了引导V2G的构想;探讨了未来EV在可再生能源和虚拟电厂方面的应用;总结了V2G在实际应用方面的难点,提出了展望。

关键词：电动汽车汽车到电网技术(V2G) 负荷预测可再生能源虚拟电厂

基于改进DAEKF的锂电池SOC和SOH联合估计

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重庆邮电大学学报（自然科学版） 2023年第4期35卷 760-766页

作者：谭泽富彭涛代妮娜蔡黎魏健陈昊重庆三峡学院电子与信息工程学院重庆404100 电动汽车与电网互动重庆市高校创新研究群体重庆404000 中国矿业大学电气工程学院江苏徐州221116

为提高锂离子荷电状态(state of charge,SOC)及健康状态(state of health,SOH)的精度,提出改进双自适应扩展卡尔曼滤波(dual adaptive extended Kalman filter,DAEKF)算法。基于二阶RC模型,建立空间状态方程;选取电池容量作为SOH的表征... 详细信息

为提高锂离子荷电状态(state of charge,SOC)及健康状态(state of health,SOH)的精度,提出改进双自适应扩展卡尔曼滤波(dual adaptive extended Kalman filter,DAEKF)算法。基于二阶RC模型,建立空间状态方程;选取电池容量作为SOH的表征量,在双扩展卡尔曼滤波算法基础上引入改进的Sage-Husa自适应算法,实现系统协方差矩阵的实时更新;为降低系统计算量,进一步加入多时间尺度理论进行优化。实验结果表明,提出的算法能较准确地估计锂电池的SOC与SOH,SOC的平均误差为0.58%,SOH最大估计误差为0.8%,该算法正确有效。

关键词：荷电状态健康状态双自适应扩展卡尔曼滤波