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Chinese Optics Letters 2024年第5期22卷 22-28页

作者：蒲正宇蒋林闫连山易安林何海军潘炜罗斌 Center for Information Photonics&Communications School of Information Science and TechnologySouthwest Jiaotong UniversityChengdu 611756China

For joint modulation format identification(MFI)and optical signal-to-noise ratio(OSNR)monitoring,a simple and intelligent optical communication performance monitoring method is proposed,and the feasibility is demonstrated by digital coherent optical communication *** experiment results show that for all modulation formats,including 28 GBaud polarization division multiplexing(PDM)QPSK/8-QAM/16-QAM/64-QAM,100%MFI accuracies are achieved even at OSNR values lower than the corresponding theoretical 20%forward error correction limit,as well as the high accuracies for OSNR ***,the proposed scheme has a reasonable monitoring level when chromatic dispersion and fiber nonlinear effects are varied.

关键词： coherent communication optical performance monitoring deep neural network

Transmission and demodulation of multi-polarization-multiplexed signals

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Chinese Science Bulletin 2014年第29期59卷 3943-3948页

作者： Zhiyu Chen Lianshan Yan Wei Pan Bin Luo yinghui Guo Hengyun Jiang anlin yi Xiaoxia Wu Wei Li Jianguo Liu Center for Information Photonics and Communications School of Information Science and TechnologySouthwest Jiaotong University JDS Uniphase Corporation 430 N McCarthy Blvd.MilpitasCA 95035USA Institute of Semiconductors Chinese Academy of Sciences

We propose the configuration of signal multiplexing with four polarization states and investigate its transmission performance over single-mode fiber *** coherent detection and digital signal processing,a demodulation scheme for four-polarization-multiplexed(4PM)system is *** discuss the impact of crosstalk from polarization mode dispersion and polarization beam splitter misalignment on the proposed 4PM ***,the transmission distance could be doubled to*50 km by employing feedback decision equalizers.

关键词：数字信号处理偏振复用传输性能解调 PM系统偏振分束器偏振模色散光纤链路

Flexible polarization demultiplexing method based on an adaptive process noise covariance Kalman filter

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Chinese Optics Letters 2018年第6期16卷 19-23页

作者： Jun Ge Lianshan Yan anlin yi Yan Pan Lin Jiang Liangliang Dai Wei Pan Bin Luo Center for Information Photonics ＆ Communications School of Information Science and Technology Southwest Jiaotong University Chengdu 610031 China

A flexible polarization demultiplexing method based on an adaptive Kalman filter（AKF） is proposed in which the process noise covariance has been estimated adaptively. The proposed method may significantly improve the adaptive capability of an extended Kalman filter（EKF） by adaptively estimating the unknown process noise covariance. Compared to the conventional EKF, the proposed method can avoid the tedious and time consuming parameter-by-parameter tuning operations. The effectiveness of this method is confirmed experimentally in 128 Gb/s 16 QAM polarization-division-multiplexing（PDM） coherent optical transmission systems. The results illustrate that our proposed AKF has a better tracking accuracy and a faster convergence（about 4 times quicker）compared to a conventional algorithm with optimal process noise covariance.

关键词： EKF PDM Flexible polarization demultiplexing method based on an adaptive process noise covariance Kalman filter QAM

Enhancing XRF sensor-based sorting of porphyritic copper ore using particle swarm optimization-support vector machine(PSO-SVM)algorithm

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International Journal of Mining Science and Technology 2024年第4期34卷 545-556页

作者： Zhengyu Liu Jue Kou Zengxin Yan Peilong Wang Chang Liu Chunbao Sun anlin Shao Bern Klein School of Civil and Resources Engineering University of Science and TechnologyBeijing 100083China Institute of Minerals Research University of Science and TechnologyBeijing 100083China State Key Laboratory of Mineral Processing Beijing 102628China Ansteel Group Mining Co.Ltd. Anshan 114000China Norman B.Keevil Institute of Mining Engineering University of British ColumbiaVancouverBC V6T 1Z4Canada

X-ray fluorescence(XRF)sensor-based ore sorting enables efficient beneficiation of heterogeneous ores,while intraparticle heterogeneity can cause significant grade detection errors,leading to misclassifications and hindering widespread technology *** classification models are crucial to determine if actual grade exceeds the sorting threshold using localized XRF *** studies mainly used linear regression(LR)algorithms including simple linear regression(SLR),multivariable linear regression(MLR),and multivariable linear regression with interaction(MLRI)but often fell short attaining satisfactory *** study employed the particle swarm optimization support vector machine(PSO-SVM)algorithm for sorting porphyritic copper ore ***-scale results showed PSO-SVM out-performed LR and raw data(RD)models and the significant interaction effects among input features was *** poor input data quality,PSO-SVM demonstrated exceptional ***-scale sorting achieved 93.0%accuracy,0.24%grade increase,84.94%recovery rate,57.02%discard rate,and a remarkable 39.62 yuan/t net smelter return(NSR)increase compared to no *** improvements were achieved by the PSO-SVM model with optimized input combinations and highest data quality(T=10,T is XRF testing times).The unsuitability of LR methods for XRF sensor-based sorting of investigated sample is *** element selection and mineral association analysis elucidate element importance and influence mechanisms.

关键词： XRF sensor-based sorting PSO-SVM algorithm Copper ore pebble Receiver operating curve(ROC) Net smelter return(NSR)

Integrated sensing and communication in an optical fibre

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Light(Science & Applications) 2023年第5期12卷 729-742页

作者： Haijun He Lin Jiang Yan Pan anlin yi Xihua Zou Wei Pan Alan E.Willner Xinyu Fan Zuyuan He Lianshan Yan Center for Information Photonics&Communications School of Information Science and TechnologySouthwest Jiaotong University611756 ChengduSichuanChina Peng Cheng Laboratory 518052 ShenzhenChina Optical Fiber Communications Laboratory University of Southern CaliforniaLos AngelesCA 90089USA State Key Laboratory of Advanced Optical Communication Systems and Networks Shanghai Jiao Tong University200240 ShanghaiChina

The integration of high-speed optical communication and distributed sensing could bring intelligent functionalities to ubiquitous optical fibre networks,such as urban structure imaging,ocean seismic detection,and safety monitoring of underground embedded *** work demonstrates a scheme of integrated sensing and communication in an optical fibre(ISAC-OF)using the same wavelength channel for simultaneous data transmission and distributed vibration *** scheme not only extends the intelligent functionality for optical fibre communication system,but also improves its transmission performance.A periodic linear frequency modulation(LFM)light is generated to act as the optical carrier and sensing probe in PAM4 signal transmission and phase-sensitive optical time-domain reflectometry(Φ-OTDR),*** a 24.5 km fibre transmission,the forward PAM4 signal and the carriercorrespondence Rayleigh backscattering signal are detected and *** results show that the integrated solution achieves better transmission performance(~1.3 dB improvement)and a larger launching power(7 dB enhancement)at a 56 Gbit/s bit rate compared to a conventional PAM4 signal ***,a 4m spatial resolution,4.32-nε/√Hz strain resolution,and over 21 kHz frequency response for the vibration sensing are *** proposed solution offers a new path to further explore the potential of existing or future fibre-optic networks by the convergence of data transmission and status *** addition,such a scheme of using shared spectrum in communication and distributed optical fibre sensing may be used to measure non-linear parameters in coherent optical communications,offering possible benefits for data transmission.

关键词： communication optical fibre

Catalytic transformation of 4-nitrophenol into 4-aminophenol over ZnO nanowire array-decorated Cu nanoparticles

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Green Chemical Engineering 2024年第2期5卷 205-212页

作者： anlin Feng Chaoyu Lin Huiqin Zhou Weihong Jin yidong Hu Dongyang Li Qingyang Li Institute of Advanced Wear&Corrosion Resistant and Functional Materials Jinan UniversityGuangzhou510632China School of Chemical Engineering and Technology Hebei University of TechnologyTianjin300401China Department of Chemical and Materials Engineering University of AlbertaEdmontonT6G 2H5Canada

To realize economical and effective removal of hazardous 4-nitrophenol from the environment,we developed an easily recyclable ZnO nanowire array decorated with Cu *** salix argyracea-shaped structure not only provides a platform to achieve stable and good dispersion of Cu nanoparticles,but also offers a great deal of catalytically active *** density functional theory calculations reveal that ZnO and Cu have a very beneficial synergistic effect on their catalytic *** synergy is ascribed to the electronic localization occurring at ZnO/Cu interface,which helps improve Cu nanoparticle’s ability to adsorb electro-negatively 4-nitrophenolate ions and to capture hydrogen radicals,thereby accelerating the hydrogen transfer from metal hydride complex to *** from these characteristics,it exhibits high efficiency and reusability towards the catalytic reduction of waste 4-nitrophenol to valuable 4-aminophenol with a rate constant of 43.02×10^(-3)s^(-1)and an average conversion of 96.5%in 90 s during 10 *** activity is superior to that of most reported noble-or non-noble-metal powder,bulk,coating,and array catalysts,indicating its competitive advantages in cost and efficiency,as well as enticing application prospects.

关键词： ZnO nanowire Cu nanoparticle Nano-heterojunction 4-Nitrophenol catalytic reduction Density functional theory

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基于非正交多址和卷积神经网络的光接入网

激光与光电子学进展 2022年第13期59卷 188-194页

作者：邓鹏程王睿杨慧易安林西南交通大学信息科学与技术学院四川成都610031

针对下一代光接入网,提出了一种基于功率域非正交多址的扩容无源光网络方案。传统的功率域非正交多址网络基于信道估计函数,采用串行干扰消除(SIC)算法进行解调和恢复,需要精确的信道估计,存在差错传播效应。针对该问题,提出了基于修正... 详细信息

针对下一代光接入网,提出了一种基于功率域非正交多址的扩容无源光网络方案。传统的功率域非正交多址网络基于信道估计函数,采用串行干扰消除(SIC)算法进行解调和恢复,需要精确的信道估计,存在差错传播效应。针对该问题,提出了基于修正卷积神经网络(CNN)的信号接收方案,利用大量数据独立拟合各用户信道函数,打破了SIC解调算法中用户间的依赖链,提升了系统的传输性能和公平性。结果表明,在扩容功率域非正交多址无源光网络中,相比传统SIC解调算法,基于修正CNN的接收方案对远端用户(传输60 km)和近端用户(传输20 km)的传输性能可分别提升约0.5 dB和1.7 dB,且其公平性指数更接近1。

关键词：光通信功率域非正交多址卷积神经网络串行干扰消除扩容无源光网络

Orange-red emitting Sr_3LaTa_3O_(12):Sm^(3+) phosphors with perovskite structure and high thermal stability for w-LEDs

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Journal of Rare Earths 2024年第3期42卷 464-472,I0002页

作者： Xiaopeng Hu anlin Zhang Yufeng Du Li Zhou Changlin Li Jingjing Lian Zhequan Zou Xuan Ouyang Bin Deng Lianwu Xie Ruijin Yu College of Chemistry Biology and Environmental Engineering Xiangnan UniversityChenzhou423043China College of Sciences Central South University of Forestry and TechnologyChangsha410004China College of Chemistry&Pharmacy Northwest A&F UniversityYangling712100China Hunan Provincial Key Laboratory of Xiangnan Rare-Precious Metals Compounds Research and Application Xiangnan UniversityChenzhou423043China

A novel layered perovskite tantalate phosphor Sr_(3)LaTa_(3)O_(12):Sm^(3+)(SLTO:Sm^(3+)) with orange-red emission was obtained for the first time via the solid-phase synthetic method. The phase purity, surface morphology,element distribution and luminescent properties of the SLTO:xSm^(3+)(x= 0.01 mol%-0.30 mol%) phosphors were investigated. Under 408 nm excitation, the optimum doped SLTO:0.10Sm^(3+) phosphor emits orangered light at 598 nm with the highest emission peak(4G_(5/2)→6H_(7/2)). The critical energy transfer distance is 1.687 nm. The prepared SLTO:0.10Sm^(3+)phosphor has excellent thermal stability with temperature quenching temperature(T_(0.5)> 500 K) and high activation energy(E_(a)= 0.25 e V). Through calculation, the chromaticity coordinates of all samples are concentrated in the orange-red area, and the color purity reaches 99%. The fabricated white light-emitting diode(w-LED) has a good correlated color temperature(5132 K), a high R_(a)(89), and the CIE chromaticity coordinates(0.340, 0.327). Consequently, the superiority of orange-red-emitting tantalate SLTO:Sm^(3+) phosphors for w-LEDs is demonstrated.

关键词： Tantalate Sr_(3)LaTa_(3)O_(12) Sm^(3+) Luminescence LED Rare earths

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轻量化YOLOv5n的高精度垃圾检测算法

计算机工程与应用 2023年第10期59卷 187-195页

作者：涂成凤易安林姚涛贺文伟西南交通大学信息科学与技术学院成都611756 西南交通大学烟台新一代信息技术研究院山东烟台264001

针对现有部署至移动设备或嵌入式设备的生活垃圾检测模型参数量多,计算量大,且识别种类较少等问题,对YOLOv5n目标检测算法进行了轻量化、高精度的优化研究。在YOLOv5n的架构上引入轻量级网络ShuffleNetv2与GhostNet实现了检测网络的轻量... 详细信息

针对现有部署至移动设备或嵌入式设备的生活垃圾检测模型参数量多,计算量大,且识别种类较少等问题,对YOLOv5n目标检测算法进行了轻量化、高精度的优化研究。在YOLOv5n的架构上引入轻量级网络ShuffleNetv2与GhostNet实现了检测网络的轻量化;同时添加注意力机制SE增强特征提取能力,以及引入基于响应的知识蒸馏算法提升定位和分类的准确率,从而提高目标检测精度。实验结果表明,在HGI-30数据集上,优化后的YOLOv5n的参数量和计算量分别减少22.3%和23.3%,检测精度mAP0.5和mAP0.5:0.95分别增加1.6个百分点和2.6个百分点。

关键词： YOLOv5n 轻量级网络知识蒸馏生活垃圾分类

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概率整形双子载波复用跨洋光纤传输系统

光学学报 2022年第20期42卷 10-15页

作者：熊凌敏闫连山蒋林易安林潘炜罗斌西南交通大学信息光子与通信研究中心四川成都611756

针对跨洋光纤通信系统中存在严重的噪声累积和非线性效应等问题,将概率整形(PS)技术与子载波复用(SCM)技术相结合以缓解跨洋传输链路损伤,进而实现系统传输性能的提升。通过在商用VPI软件中搭建跨洋光纤传输仿真链路,对单载波和双子载... 详细信息

针对跨洋光纤通信系统中存在严重的噪声累积和非线性效应等问题,将概率整形(PS)技术与子载波复用(SCM)技术相结合以缓解跨洋传输链路损伤,进而实现系统传输性能的提升。通过在商用VPI软件中搭建跨洋光纤传输仿真链路,对单载波和双子载波复用系统进行仿真研究。仿真结果表明,在20%的FEC阈值条件下,均匀(H=4)双子载波和PS(H=3.6,H=3.7,H=3.8)双子载波PDM-16QAM系统的传输距离相比均匀(H=4)单载波PDM-16QAM系统分别提升了2.3%(405 km)、21%(3698 km)、19.7%(3468 km)和14.5%(2549 km)。随后,搭建光纤环路传输实验平台,进一步验证所提方案的可行性。实验结果表明,在20%的FEC阈值条件下,均匀双子载波和PS(H=3.8)双子载波PDM-16QAM系统的传输距离相比均匀单载波PDM-16QAM系统分别提升了5.6%(282 km)和46.2%(2323 km)。仿真与实验结果表明,在跨洋光纤通信系统中引入PS与SCM可有效提升系统的传输性能。

关键词：光通信概率整形子载波复用非线性效应跨洋光纤通信