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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

Photocatalytic degradation of sulfadiazine in suspensions of TiO_(2)nanosheets with exposed(001)facets

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Chinese Chemical Letters 2021年第10期32卷 3215-3220页

作者： Xiaofan xiang Laiyan Wu junjiang Zhu Jiazhou Li Xi Liao Hongcheng Huang Jiajie Fan Kangle Lv Key Laboratory of Resources Conversion and Pollution Control of the State Ethnic Affairs Commission College of Resources and Environmental ScienceSouth-Central University for NationalitiesWuhan 430074China Hubei Key Laboratory of Biomass Fibers and Eco-Dyeing&Finishing College of Chemistry and Chemical EngineeringWuhan Textile UniversityWuhan 430200China School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450001China

Antibiotics such as sulfonamides are widely used in agriculture as growth promoters and medicine in treatment of infectious diseases.However,the release of these antibiotics has caused serious environmental problems.In this paper,photocatalytic oxidation technology was used to degrade sulfadiazine(SDZ),one of the typical sulfonamides antibiotics,in UV illuminated TiO_(2)suspensions.It was found that TiO_(2)nanosheets(TiO_(2)-NSs)with exposed(001)facets exhibit much higher photoreactivity towards SDZ degradation compared to TiO_(2)nanoparticles(TiO_(2)-NPs)with a rate constant increases from0.017 min^(-1)to 0.035 min^(-1),improving by a factor of 2.1.Under the attacking of reactive oxygen species(ROSs)such as superoxide radicals(*O_(2)^(-))and hydroxyl radicals(*OH),SDZ was steady degraded on the surface of TiO_(2)-NSs.Based on the identification of the produced intermediates by LC–MS/MS,possible degradation pathways of SDZ,which include desulfonation,oxidation and cleavage,were put forwards.After UV irradiation for 4 h,nearly 90%of the total organic carbon(TOC)can be removed in suspensions of TiO_(2)-NSs,indicating the mineralization of SDZ.TiO_(2)-NSs also exhibits excellent stability in photocatalytic degradation of SDZ in wide range of pH.Even after recycling used for 7 times,more than 91.3%of the SDZ can be efficiently removed,indicating that they are promising to be practically used in treatment of wastewater containing antibiotics.

关键词： Sulfadiazine Antibiotics Photocatalytic degradation TiO_(2)nanosheets Degradation pathway

基于分布式动力的翼身融合飞机整流罩气动设计

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北京航空航天大学学报 2018年第1期44卷 71-81页

作者：项洋吴江浩熊峻江北京航空航天大学交通科学与工程学院北京100083

整流罩设计对基于分布式动力的翼身融合(BWB)飞机气动特性会产生显著影响。为了揭示在边界层吸入(BLI)效应下整流罩的设计参数对飞机气动特性的影响及其原因,采用计算流体力学(CFD)方法和Morris敏感度分析法对此布局飞机气动特性进行了... 详细信息

整流罩设计对基于分布式动力的翼身融合(BWB)飞机气动特性会产生显著影响。为了揭示在边界层吸入(BLI)效应下整流罩的设计参数对飞机气动特性的影响及其原因,采用计算流体力学(CFD)方法和Morris敏感度分析法对此布局飞机气动特性进行了详细研究,得到了整流罩主要设计参数对飞机气动特性影响的敏感度和耦合关系,并对典型设计参数下的流动特性进行分析。结果表明:对飞机气动特性影响较大的参数是整流罩特征截面2和3的最大厚度,这是因为其增大了当地截面的厚度和弯度,进而影响了整流罩表面的压力分布;在流量系数减小和进气边界弦向位置前移时,最大厚度增大会造成背风面发生局部分离;整流罩特征截面2和3的最大厚度对气动特性具有较强的耦合影响。

关键词：翼身融合(BWB)布局边界层吸入(BLI) 计算流体力学(CFD) 敏感度分析整流罩

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基于堆叠边缘感知模块的显著性目标检测

模式识别与人工智能 2020年第10期33卷 906-916页

作者：杨佳信胡晓向俊将广州大学电子与通信工程学院广州510006

现有显著性目标检测算法对边缘感知的效果不理想.因此,为了有效利用高层语义信息及低层纹理信息,文中提出基于堆叠边缘感知模块的显著性目标检测算法.采用多尺度骨干网络(Res2Net)作为主干网络提取图像的多尺度、多目标的显著性特征.堆... 详细信息

现有显著性目标检测算法对边缘感知的效果不理想.因此,为了有效利用高层语义信息及低层纹理信息,文中提出基于堆叠边缘感知模块的显著性目标检测算法.采用多尺度骨干网络(Res2Net)作为主干网络提取图像的多尺度、多目标的显著性特征.堆叠边缘感知模块以非对称性方式融合图像高低层信息,增强显著性目标区域.网络输出显著性目标的检测结果.在5个公开数据集上的实验表明,文中算法检测结果较优,同时,在客观评估指标和主观视觉效果上也较优.

关键词：显著性目标检测(SOD) 高层语义信息低层纹理信息边缘感知模块

Hound:a parallel image distribution system for cluster based on Docker

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Journal of Systems Engineering and Electronics 2023年第4期34卷 955-965页

作者： LIU Zijie LI junjiang CHEN Can ZHANG Dengyin School of Internet of Things Nanjing University of Posts and TelecommunicationsNanjing 210003China Jiangsu Key Laboratory of Broadband Wireless Communication and Internet of Things Nanjing University of Posts and TelecommunicationsNanjing 210003China College of Telecommunications&Information Engineering Nanjing University of Posts and TelecommunicationsNanjing 210003China

Current applications,consisting of multiple replicas,are packaged into lightweight containers with their execution dependencies.Considering the dominant impact of distribution efficiency of gigantic images on container startup(e.g.,distributed deep learning application),the image“warm-up”technique which prefetches images of these replicas to destination nodes in the cluster is proposed.However,the current image“warm-up”technique solely focuses on identical image distribution,which fails to take effect when distributing different images to destination nodes.To address this problem,this paper proposes Hound,a simple but efficient cluster image distribution system based on Docker.To support diverse image distribution requests of cluster nodes,Hound additionally adopts node-level parallelism(i.e.,downloading images to destination nodes in parallel)to further improve the efficiency of image distribution.The experimental results demonstrate Hound outperforms Docker,kubernetes container runtime interface(CRI-O),and Docker-compose in terms of image distribution performance when cluster nodes request different images.Moreover,the high scalability of Hound is evaluated in the scenario of ten nodes.

关键词： container image image distribution parallelism containerization

Progressive damage behaviors of woven composite laminates subjected to LVI, TAI and CAI

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Chinese Journal of Aeronautics 2020年第10期33卷 2807-2823页

作者： Zhengqiang CHENG junjiang XIONG School of Transportation Science and Engineering Beihang UniversityBeijing 100083China

This paper seeks to deal with progressive damage behaviors of woven composite laminates subjected to low-velocity impact(LVI),tension-after-impact(TAI)and compression-afterimpact(CAI).The LVI,TAI and CAI tests were conducted on woven carbon fibre lamina3238 A/CF3052 and woven glass fibre lamina 3238 A/EW250 F,and the time-dependent LVI contact force and deflection curves,static TAI and CAI load versus displacement curves were determined and discussed.A modified progressive damage model was presented for explicit dynamic LVI and implicit static TAI and CAI analysis by using basic material properties and geometrical dimensions,and progressive damage LVI,TAI and CAI behaviors of woven composite laminates were simulated,demonstrating a good correlation between simulations and experiments.

关键词： Compression after impact Low velocity impact Progressive damage Tension after impact Woven composite laminates

Effect of stress ratio on HCF and VHCF properties at temperatures of 20 °C and 700 °C for nickel-based wrought superalloy GH3617M

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Chinese Journal of Aeronautics 2019年第9期32卷 2199-2210页

作者： Aoshuang WAN junjiang XIONG School of Transportation Science and Engineering Beihang University

This paper attempts to investigate the effects of stress ratio and high temperature on the HCF(high-cycle-fatigue) and VHCF(very-high-cycle-fatigue) behaviors of nickel-based wrought superalloy GH3617 M. Fatigue tests over the full HCF and VHCF regimes were conducted on superalloy GH3617 M subjected to constant-amplitude loading at five stress ratios of -1, -0.5, 0,0.4, and 0.8 in environments of 20 °C and 700 °C temperatures. From experimental observation and fractographic analysis, fatigue mechanisms were deduced to reveal the synergistic interaction between high temperature and stress ratio on the HCF and VHCF behaviors of superalloy GH3617 M. A phenomenological model was crafted from available fatigue design knowledge to evaluate the synergistic interaction, and a good correlation between predictions and experiments has been achieved.

关键词： High cycle fatigue High-temperature Nickel-based superalloy Stress ratio Very high cycle fatigue

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基于递进式特征增强聚合的伪装目标检测

计算机应用 2022年第7期42卷 2192-2200页

作者：谭湘粤胡晓杨佳信向俊将广州大学电子与通信工程学院广州510006 广州大学机械与电气工程学院广州510006

伪装目标检测(COD)旨在检测隐藏在复杂环境中的目标。现有COD算法在结合多层次特征时,忽略了特征的表达和融合方式对检测性能的影响。为此,提出一种基于递进式特征增强聚合的COD算法。首先,通过主干网络提取多级特征;然后,为了提高特征... 详细信息

伪装目标检测(COD)旨在检测隐藏在复杂环境中的目标。现有COD算法在结合多层次特征时,忽略了特征的表达和融合方式对检测性能的影响。为此,提出一种基于递进式特征增强聚合的COD算法。首先,通过主干网络提取多级特征;然后,为了提高特征的表达能力,使用由特征增强模块(FEM)构成的增强网络对多层次特征进行增强;最后,在聚合网络中设计邻近聚合模块(AAM)实现相邻特征之间的信息融合,以突显伪装目标区域的特征,并提出新的递进式聚合策略(PAS)通过渐进的方式聚合邻近特征,从而在实现多层特征有效融合的同时抑制噪声。在3个公开数据集上的实验表明,所提算法相较于12种最先进的算法在4个客观评价指标上均取得最优表现,尤其是在COD10K数据集上所提算法的加权的F测评法和平均绝对误差(MAE)分别达到了0.809和0.037。由此可见,所提算法在COD任务上拥有较优的性能。

关键词：卷积神经网络伪装目标检测特征增强邻近聚合模块递进式聚合策略

A multi-resource scheduling scheme of Kubernetes for IIoT

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Journal of Systems Engineering and Electronics 2022年第3期33卷 683-692页

作者： ZHU Lin LI junjiang LIU Zijie ZHANG Dengyin Jiangsu Key Laboratory of Broadband Wireless Communication and Internet of Things Nanjing University of Posts and TelecommunicationsNanjing 210003China School of Internet of Things Nanjing University of Posts and TelecommunicationsNanjing 210003China

With the rapid development of data applications in the scene of Industrial Internet of Things(IIoT),how to schedule resources in IIoT environment has become an urgent problem to be solved.Due to benefit of its strong scalability and compatibility,Kubernetes has been applied to resource scheduling in IIoT scenarios.However,the limited types of resources,the default scheduling scoring strategy,and the lack of delay control module limit its resource scheduling performance.To address these problems,this paper proposes a multi-resource scheduling(MRS)scheme of Kubernetes for IIoT.The MRS scheme dynamically balances resource utilization by taking both requirements of tasks and the current system state into consideration.Furthermore,the experiments demonstrate the effectiveness of the MRS scheme in terms of delay control and resource utilization.

关键词： Industrial Internet of Things(IIoT) Kubernetes resource scheduling time delay