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Scalable parallel ultrafast optical random bit generation based on a single chaotic microcomb

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Light(Science & Applications) 2024年第4期13卷 637-644页

作者： Pu Li Qizhi Li Wenye Tang Weiqiang Wang Wenfu Zhang Brent ELittle Sai Tek Chu KAlan Shore yuwen qin Yuncai Wang Institute of Advanced Photonics Technology School of Information EngineeringGuangdong University of TechnologyGuangzhou 51006China. Key Laboratory of Photonic Technology for Integrated Sensing and Communication Ministry of Education of ChinaGuangdong University of TechnologyGuangzhou 51006China. Guangdong Provincial Key Laboratory of Information Photonics Technology Guangdong University of TechnologyGuangzhou 51006China. Key Laboratory of Advanced Transducers andIntelligent Control System Ministry of EducationTaiyuan University of TechnologyTaiyuan 030024China. State Key Laboratory of Transient Optics and Photonics Xi’an Institute of Optics and Precision MechanicsChinese Academy of SciencesXi’an 710119China. Department of Physics and Materials Science City University of Hong KongHong KongChina. School of Electronic Engineering Bangor UniversityBangorWales LL571UTUK

Random bit generators are critical for information security,cryptography,stochastic modeling,and *** and scalability are key challenges faced by current physical random bit ***,we propose a massively parallel scheme for ultrafast random bit generation towards rates of order 100 terabit per second based on a single micro-ring resonator.A modulation-instability-driven chaotic comb in a micro-ring resonator enables the simultaneous generation of hundreds of independent and unbiased random bit streams.A proof-of-concept experiment demonstrates that using our method,random bit streams beyond 2 terabit per second can be successfully generated with only 7 comb *** bit rate can be easily enhanced by further increasing the number of comb lines *** approach provides a chip-scale solution to random bit generation for secure communication and high-performance computation,and offers superhigh speed and large scalability.

关键词： resonator random chaotic

Linear shallow neural network to accelerate transmitter dispersion eye closure quaternary(TDECQ) assessment

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Science China(Information Sciences) 2024年第4期67卷 337-338页

作者： Junjiang XIANG Zejun CHEN Yijun CHENG Hailin YANG Xuancheng HUO Meng XIANG Gai ZHOU yuwen qin Songnian FU Institute of Advanced Photonics Technology School of Information EngineeringGuangdong University of Technology School of Optical and Electronic Information Huazhong University of Science and Technology Key Laboratory of Photonic Technology for Integrated Sensing and Communication Ministry of Education of ChinaGuangdong University of Technology Guangdong Provincial Key Laboratory of Information Photonics Technology Guangdong University of Technology

To support the ever-emerging capacity requirement of datacenter interconnection(DCI) applications, transmitter dispersion eye closure quaternary(TDECQ) has been proposed by IEEE802.3 standard [1], which is specifically employed for the four-level pulse amplitude modulation(PAM-4) signals. However, the traditional scheme of TDECQ assessment needs several iterative operations,

关键词： IEEE Standards

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黄河流域城市群水资源利用公平性评价及影响路径分析

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环境科学学报 2024年第4期44卷 449-462页

作者：杨屹秦玉雯西安理工大学经济与管理学院西安710054

黄河流域集聚着兰州-西宁、呼包鄂榆、关中平原、山东半岛、中原5座国家级城市群.人口增长和城市扩张速度过快使得水资源利用不公平问题日趋严峻,导致城市群资源难以实现高效配置.本研究面向联合国提出的可持续发展目标6,在描述人均水... 详细信息

黄河流域集聚着兰州-西宁、呼包鄂榆、关中平原、山东半岛、中原5座国家级城市群.人口增长和城市扩张速度过快使得水资源利用不公平问题日趋严峻,导致城市群资源难以实现高效配置.本研究面向联合国提出的可持续发展目标6,在描述人均水足迹、人均水赤字、城市发展指数(City Development Index,CDI)与水资源生态系统服务价值(Water Ecosystem Service Value,WESV)时空演变特征及其差异性的基础上,采用基尼系数与贡献系数评价了2010—2021年黄河流域城市群水资源利用公平程度,并通过综合发展贡献系数和生态服务贡献系数识别了城市群功能类型,结合驱动-压力-状态-影响-响应(Drive-Pressure-State-Impact-Response,DPSIR)框架与结构方程模型探讨了影响水资源利用公平性的路径.结果表明:(1)2010—2021年,城市群之间人均水足迹与人均水赤字具有明显差异,CDI的差值逐步缩小,但WESV的差值逐渐扩大;(2)水资源利用程度同CDI之间相对公平,综合发展基尼系数均值为0.255,但同WESV之间公平程度较差,生态服务基尼系数均值为0.497,表明城市群存在水资源利用不公平的问题.仅有兰州-西宁城市群属于“高发展贡献、高生态贡献”城市群;(3)治理措施是影响黄河流域城市群水资源利用公平性的主要原因.本研究剖析了影响城市群水资源公平配置的因素,为提高黄河流域治理能力提供了理论依据.

关键词：水资源利用公平性基尼系数城市群黄河流域

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Mode-dependent dynamic gain of all-fiber FM-EDFA under various pump manipulation

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Chinese Optics Letters 2024年第2期22卷 128-134页

作者：方翼鸿张心怡黄锡恒曾研许鸥李建平付松年秦玉文 Institute of Advanced Photonics Technology School of Information EngineeringGuangdong University of TechnologyGuangzhou 510006China Guangdong Provincial Key Laboratory of Information Photonics Technology Guangdong University of TechnologyGuangzhou 510006China Key Laboratory of Photonic Technology for Integrated Sensing and Communication Ministry of EducationGuangdong University of TechnologyGuangzhou 510006China

The dynamic gain of a few-mode erbium-doped fiber amplifier(FM-EDFA)is vital for the long-haul mode division multiplexing(MDM)***,we investigate the mode-dependent dynamic gain of an FM-EDFA under various manipulations of the pump ***,we numerically calculate the gain variation with respect to the input signal power,where a modedependent saturation input power occurs under different pump *** under the fixed intensity profile of the pump laser,the saturation input power of each spatial mode is ***,high-order mode pumping leads to a compression of the linear amplification region,even though it is beneficial for the mitigation of the differential modal gain(DMG)arising in all guided ***,we develop an all-fiber 3-mode EDFA,where the fundamental mode of the pump laser can be efficiently converted to the LP_(11)mode using the all-fiber mode-selective coupler(MSC).In comparison with the traditional LP_(01)pumping scheme,the DMG at 1550 nm can be mitigated from 1.61 dB to 0.97 dB under the LP_(11)mode pumping,while both an average gain of 19.93 dB and a DMG of less than 1 dB can be achieved from 1530 nm to 1560 ***,the corresponding signal input saturation powers are reduced by 0.3 dB for the LP_(01)mode and 1.6 dB for the LP_(11)mode,*** theoretical and experimental results indicate that a trade-off occurs between the DMG mitigation and the extension of the linear amplification range when the intensity profile of pump laser is manipulated.

关键词： few-mode erbium-doped fiber amplifier differential modal gain saturation input power

人口老龄化对我国基本医疗保险基金结余可持续发展的影响研究

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中国卫生经济 2024年第7期43卷 36-41页

作者：胡芳王磊鑫覃钰雯广西大学经济学院广西南宁530004

目的:预防人口老龄化可能带来的影响,找出确保基本医疗保险基金结余可持续发展的对策。方法:运用系统动力学,通过耦合基本医疗保险基金收入、基本医疗保险基金支出、人口数量三大子系统,绘制因果关系图与存量流量图,从而构建系统动力学... 详细信息

目的:预防人口老龄化可能带来的影响,找出确保基本医疗保险基金结余可持续发展的对策。方法:运用系统动力学,通过耦合基本医疗保险基金收入、基本医疗保险基金支出、人口数量三大子系统,绘制因果关系图与存量流量图,从而构建系统动力学模型,并利用Vensim软件进行仿真模拟。结果:预测的自然情形下,基本医疗保险基金结余在2023—2030年呈现出先上升后下降的趋势。将退休策略、门诊次数和参保率3个变量进行调控设计并组合成为4种解决方案,其中同时实施延迟退休、扩大基本医疗保险覆盖面和加强老年人健康管理的预测方案4可大幅度减少基本医疗保险基金的下降幅度。结论:人口老龄化不利于基本医疗保险基金结余可持续发展,据此提出相关建议:实施适当的延迟退休政策,实现基本医疗保险基金收入增加;进一步扩大参保覆盖面,强化基本医疗保险基金的抗风险能力;加强老年人健康管理,控制基本医疗保险基金支出过快增长。

关键词：基本医疗保险基金结余可持续发展人口老龄化系统动力学

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施氮模式和施氮量对细叶青冈幼苗生长的影响

东北农业大学学报 2024年第5期55卷 35-45页

作者：焦雪辉乔雨轩秦玉文史喜兵郑州市农业科技研究院郑州450005 安阳市林业技术工作中心河南安阳455000

为探讨氮肥对细叶青冈幼苗生长的影响,利用平均施氮和指数施氮两种施氮模式,研究细叶青冈幼苗生长量、生物量及生理指标对施氮量的响应,采用主成分分析和隶属函数法筛选出最佳施氮模式和施肥量。结果表明,平均施氮模式下,总施肥量为1 60... 详细信息

为探讨氮肥对细叶青冈幼苗生长的影响,利用平均施氮和指数施氮两种施氮模式,研究细叶青冈幼苗生长量、生物量及生理指标对施氮量的响应,采用主成分分析和隶属函数法筛选出最佳施氮模式和施肥量。结果表明,平均施氮模式下,总施肥量为1 600 mg·株^(-1)时细叶青冈幼苗株高和生物量最大,总施肥量为1 200 mg·株^(-1)时细叶青冈幼苗地径最大;指数施氮模式下,总施肥量为400 mg·株^(-1)时细叶青冈幼苗株高、地径及生物量均最大。通过主成分和隶属函数分析,对13个处理作综合评价,最终筛选出最适合细叶青冈幼苗生长的施氮处理为平均施氮模式下总施肥量1 600 mg·株^(-1)。与指数施氮相比,平均施氮模式施肥程序简单,便于经营者掌握,更适合细叶青冈幼苗生长,建议将总施肥量1 600 mg·株^(-1)作为细叶青冈良种壮苗培育的施肥措施在生产中推广应用。

关键词：细叶青冈平均施氮指数施氮生长指标生理指标

一种跨模态光学信息交互和模板动态更新的RGBT目标跟踪方法

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光学学报 2024年第7期44卷 101-115页

作者：陈建明李定鲣曾祥津任振波邸江磊秦玉文通感融合光子技术教育部重点实验室广东省信息光子技术重点实验室广东工业大学信息工程学院先进光子技术研究院广东广州510006 南方海洋科学与工程广东省实验室(珠海) 广东珠海519082 光场调控与信息感知工业和信息化部重点实验室陕西省信息光子技术重点实验室西北工业大学物理科学与技术学院陕西西安710129

提出一种跨模态光学信息交互和模板动态更新的可见光和热红外(RGBT)跟踪方法,选取能够在跟踪速度和精度上取得平衡的Siamese跟踪器作为基本框架,并设计特征交互模块以重构不同模态的信息比例和增强模态间信息交流。在此基础上,基于无锚... 详细信息

提出一种跨模态光学信息交互和模板动态更新的可见光和热红外(RGBT)跟踪方法,选取能够在跟踪速度和精度上取得平衡的Siamese跟踪器作为基本框架,并设计特征交互模块以重构不同模态的信息比例和增强模态间信息交流。在此基础上,基于无锚框的思想构建预测网络,以提升跟踪器的灵活性和通用性,同时提出一种模板动态更新的策略,通过动态更新跟踪模板增强模型对变化目标的适应能力。在GTOT等3个基准数据集上的对比实验表明,所提方法可显著提升跟踪器在复杂环境下的目标跟踪性能。

关键词：机器视觉计算机视觉目标跟踪孪生网络模板更新

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Double-branch fusion network with a parallel attention selection mechanism for camouflaged object detection

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Science China(Information Sciences) 2023年第6期66卷 258-266页

作者： Junjiang XIANG qing PAN Zhengrong ZHANG Songnian FU yuwen qin Advanced Institute of Photonics Technology School of Information EngineeringGuangdong University of Technology Guangdong Provincial Key Laboratory of Photonics Information Technology Guangdong University of Technology Guangxi Key Laboratory of Multimedia Communications and Network Technology School of Computer Electronics and InformationGuangxi University

To meet the challenge of camouflaged object detection (COD),which has a high degree of intrinsic similarity between the object and background,this paper proposes a double-branch fusion network(DBFN)with a parallel attention selection mechanism (PASM).In detail,a schismatic receptive field block(SRF)combined with an attention mechanism for low-level information is performed to learn texture features in one branch,and an integration of the SRF,a hybrid attention mechanism (HAM),and a depth feature polymerization module (DFPM)is employed for high-level information to extract detection features in the other ***,both texture features and detection features are input into the PASM to acquire selective expression ***,the final result is obtained after further selective matrix optimization with atrous spatial pyramid pooling (ASPP)and a residual channel attention block (RCAB)being applied *** results on three public datasets verify that our method outperforms the state-of-the-art methods in terms of four evaluation metrics,i.e.,mean absolute error (MAE),weighted F βmeasure (Fβω),structural measure (Sα),and E-measure (Eφ)

关键词： camouflaged object detection attention mechanism feature extraction feature aggregation texture information fuzzy boundary

A Plasmonic Refractive-Index Sensor Based Multiple Fano Resonance Multiplexing in Slot-Cavity Resonant System

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Photonic Sensors 2022年第2期12卷 175-184页

作者： Zicong GUO Kunhua WEN yuwen qin Yihong FANG Zhengfeng LI Li CHEN School of Physics and Optoelectronic Engineering Guangdong University of TechnologyGuangzhou 510006China School of Information Engineering Guangdong University of TechnologyGuangzhou 510006China

In this paper,a sub-wavelength metal-insulator-metal(MIM)waveguide structure is proposed by using a cross-shape rectangular cavity,of which wings are coupled with two rectangular ***,a cross-shape rectangular cavity is placed between the input and output MIM *** to the mutual interference between bright and dark modes,three Fano resonant peaks are ***,by adding a rectangular cavity on the left wing of the cross shaped one,five asymmetric Fano resonance peaks are ***,six asymmetric Fano resonance peaks are achieved after adding another cavity on the right ***,the finite-difference-time-domain(FDTD)method and multimode interference coupled-mode theory(MICMT)are used to simulate and analyze the coupled plasmonic resonant system,*** highest sensitivity of 1 OOOnm/RIU is achieved.

关键词： Sub-wavelength MIM waveguide Fano resonance