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车联网边缘计算场景下基于改进型NSGA-Ⅱ算法的边缘服务器部署决策

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物联网学报 2024年第1期8卷 84-97页

作者：朱思峰王钰陈昊朱海柴争义杨诚瑞天津城建大学计算机与信息工程学院天津300384 河南工程学院计算机学院河南郑州451191 天津工业大学计算机科学与技术学院天津300387

车联网环境下,边缘服务器的放置位置与部署数量直接影响到边缘计算的效率。由于在宏基站或基站上部署大型边缘服务器的成本较高,可以在微基站上部署一个小型边缘服务器作为补充,并通过优化大型边缘服务器的放置位置来降低成本。为了最... 详细信息

车联网环境下,边缘服务器的放置位置与部署数量直接影响到边缘计算的效率。由于在宏基站或基站上部署大型边缘服务器的成本较高,可以在微基站上部署一个小型边缘服务器作为补充,并通过优化大型边缘服务器的放置位置来降低成本。为了最小化边缘服务器的部署代价和服务延迟、最大化运营商的收入和服务器负载均衡度,把边缘服务器放置问题与车联网用户应用服务放置问题联合建模为一个多目标优化问题,并提出了基于改进型NSGA-Ⅱ算法的放置方案。实验结果表明,提出的边缘服务器放置方案能够降低约44%的边缘服务器部署成本,降低约14.2%的时延,提升24.2%的运营商收入,具有较好的应用价值。

关键词：车联网边缘计算边缘服务器部署问题多目标优化算法 NSGA-Ⅱ

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单幅图像局部特征分层模糊挖掘算法仿真

计算机仿真 2024年第8期41卷 195-199页

作者：牛庆丽王黎明郑州科技学院大数据与人工智能学院河南郑州450064 郑州大学信息工程学院河南郑州450001

为了能够深入获得图像纹理特征信息,提高后续数据识别精准度。因此,提出了单幅图像局部特征分层模糊挖掘算法。通过直方图均衡化方法,将图像中灰度值集中到对应灰度等级区域。由不均匀分布向均匀分布状态转换,拓展像素的灰度动态范围。... 详细信息

为了能够深入获得图像纹理特征信息,提高后续数据识别精准度。因此,提出了单幅图像局部特征分层模糊挖掘算法。通过直方图均衡化方法,将图像中灰度值集中到对应灰度等级区域。由不均匀分布向均匀分布状态转换,拓展像素的灰度动态范围。分析图像局部特征复杂度与差异度,求出相邻模板灰度等级,得到局部复杂性和差异度矩阵,采用Laplace算法对图像局部特征推荐分类,根据推荐级别分层模糊挖掘所选特征,以此实现对单幅图像的局部特征分层模糊挖掘。通过实验证明,所提算法可准确挖掘出图像特征,不同层级纹理信息都完整,且挖掘时间保持在0.25s内。

关键词：单幅图像局部特征特征分层模糊挖掘差异度矩阵局部差异度

High-entropy ceramics:Present status,challenges,and a look forward

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Journal of Advanced Ceramics 2021年第3期10卷 385-441页

作者： Huimin XIANG Yan XING Fu-zhi DAI Hongjie wang Lei SU Lei MIAO Guojun ZHANG Yiguang wang Xiwei QI Lei YAO Hailong wang Biao ZHAO Jianqiang LI Yanchun ZHOU science and technology on Advanced Functional Composite Laboratory Aerospace Research Institute of Materials&Processing TechnologyBeijing 100076China New Energy technology engineering Laboratory of Jiangsu Province Nanjing University of Posts and TelecommunicationsNanjing 210023China State Key Laboratory for Mechanical Behavior of Materials Xi’an Jiaotong UniversityXi’an 710049China Guangxi Key Laboratory of information Materials Guangxi Collaborative Innovation Center of Structure and Property for New Energy and MaterialSchool of Material Science and EngineeringGuilin University of Electronic TechnologyGuilin 541004China Institute of Functional Material College of Material Science and EngineeringDonghua UniversityShanghai 201620China Institute of Advanced Structure technology Beijing Institute of TechnologyBeijing 100081China College of Metallurgy and Energy North China University of Science and TechnologyTangshan 063210China College of Material science and engineering Shenzhen UniversityShenzhen 518060China school of Materials science and engineering Zhengzhou UniversityZhengzhou 450001China henan Key Laboratory of Aeronautical Materials and Application technology School of Material Science and EngineeringZhengzhou University of AeronauticsZhengzhou 450046China National engineering Laboratory for Hydrometallurgical Cleaner Production technology CAS Key Laboratory of Green Process and EngineeringInstitute of Process EngineeringChinese Academy of SciencesBeijing 100190China

High-entropy ceramics (HECs) are solid solutions of inorganic compounds with one or more Wyckoff sites shared by equal or near-equal atomic ratios of multi-principal *** in the infant stage,the emerging of this new family of materials has brought new opportunities for material design and property *** from metals,the diversity in crystal structure and electronic structure of ceramics provides huge space for properties tuning through band structure engineering and phonon *** from strengthening,hardening,and low thermal conductivity that have already been found in high-entropy alloys,new properties like colossal dielectric constant,super ionic conductivity,severe anisotropic thermal expansion coefficient,strong electromagnetic wave absorption,etc.,have been discovered in *** a response to the rapid development in this nascent field,this article gives a comprehensive review on the structure features,theoretical methods for stability and property prediction,processing routes,novel properties,and prospective applications of *** challenges on processing,characterization,and property predictions are also ***,future directions for new material exploration,novel processing,fundamental understanding,in-depth characterization,and database assessments are given.

关键词： high-entropy ceramics(HECs) processing structure properties applications

On Diophantine approximation with one prime and three squares of primes

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Frontiers of Mathematics in China 2019年第4期14卷 761-779页

作者： Wenxu GE Feng ZHAO Tianqin wang school of Mathematics Statist ics North China University of Water Resources and Elec trie Power Zhengzhou 450046 China school of information engineering North China University of Water Resources and Electric Power Zhengzhou 450046 China

Let λ1,λ2,λ3,λ4 be non-zero real numbers, not all of the same sign, w real. Suppose that the ratios λ1/λ2,λ1/λ3 are irrational and algebraic. Then there are infinitely many solutions in primes pj, j = 1, 2,3,4, to the inequality |λ1p1 +λ2p^2/2 +λ3p^2/3+|λ4p^2/4+■(max{p1,p^2/2,p^2/3,p^2/4})-^5/64. This improves the earlier result.

关键词： Diophantine inequalities primes Davenport-Heilbronn met hod sieve methods

A Design and Comparative Investigation of Graded AlxGa1–xN EBL for W-B0.375Ga N/W-B0.45GaN Edge Emitting Laser Diode on AlN Substrate

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Chinese Journal of Electronics 2022年第4期31卷 683-689页

作者： NIASS Mussaab I. wang Fang LIU Yuhuai National Center for International Joint Research of Electronic Materials and Systems International Joint-Laboratory of Electronic Materials and Systems of Henan Province School of Information EngineeringZhengzhou University zhengzhou Way Do Electronics Co.Ltd. Research Institute of Industrial technology Co.Ltd. Zhengzhou University Institute of Materials and Systems for Sustainability Nagoya University

In this paper, we numerically demonstrated the possibility of using wurtzite boron gallium nitride(W-BGa N) as active layers(quantum well and quantum barriers) along with aluminum gallium nitride(Al Ga N) to achieve lasing at a deep ultraviolet range at 263nm for edge emitting laser diode. The laser diode structure simulations were conducted by using the CrosslightLASTIP software with a self-consistency model for varies quantity calculations. Moreover, multiple designed structures such as full and half have been achieved as well as the study of the effect of grading engineering/techniques at the electron blocking layer for linearly-graded-down and linearly-graded-up grading techniques were also emphasized. As a result, a maximum emitted power of 26 W,a minimum threshold current of 308 m A, a slope efficiency of 2.82 W/A, and a minimum p-type resistivity of0.228 Ω·cm from the different doping concentrations and geometrical distances were thoroughly observed and jotted down.

关键词： Edge emitting laser diodes (EELD) Semiconducting aluminum compounds Heterojunction semiconductor devices Quantum wells

Improvement of radiative recombination rate in deep ultraviolet laser diodes with step-like quantum barrier and aluminum-content graded electron blocking layer

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Chinese Physics B 2020年第1期29卷 412-416页

作者： Yi-Fu wang Mussaab I Niass Fang wang Yu-Huai Liu National Center of International Joint Research for Electronic Materials and Systems Zhengzhou UniversityZhengzhou 450001China International Joint Laboratory of Electronic Materials and Systems Zhengzhou UniversityZhengzhou 450001China school of information engineering Zhengzhou UniversityZhengzhou 450001China

The design of the active region structures,including the modifications of structures of the quantum barrier(QB)and electron blocking layer(EBL),in the deep ultraviolet(DUV)Al Ga N laser diode(LD)is investigated numerically with the Crosslight *** analyses focus on electron and hole injection efficiency,electron leakage,hole diffusion,and radiative recombination *** with the reference QB structure,the step-like QB structure provides high radiative recombination and maximum output ***,a comparative study is conducted on the performance characteristics with four different *** the EBL with different Al mole fraction layers,the higher Al-content Al Ga N EBL layer is located closely to the active region,leading the electron current leakage to lower,the carrier injection efficiency to increase,and the radiative recombination rate to improve.

关键词： radiative recombination rate step-like quantum barrier aluminum-content-graded EBL

结合差分隐私与安全聚集的联邦空间数据发布方法

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计算机应用 2024年第9期44卷 2777-2784页

作者：张治政张啸剑王俊清冯光辉河南财经政法大学计算机与信息工程学院郑州450046 郑州市人工智能安全与隐私保护重点实验室(河南财经政法大学) 郑州450046 广州大学计算机科学与网络工程学院广州510006

针对联邦空间数据的数据孤岛问题、空间数据索引问题以及发布联邦空间数据存在的隐私问题,提出基于动态四分树的联邦空间数据发布(FSP)方法。首先,在FSP方法的每轮迭代中,服务端把四分树副本共享给该轮中每个客户端,每个客户端利用四分... 详细信息

针对联邦空间数据的数据孤岛问题、空间数据索引问题以及发布联邦空间数据存在的隐私问题,提出基于动态四分树的联邦空间数据发布(FSP)方法。首先,在FSP方法的每轮迭代中,服务端把四分树副本共享给该轮中每个客户端,每个客户端利用四分树副本编码自身位置数据,利用Polya分布产生离散噪声在本地扰动编码结果;其次,结合容错学习(LWE)生成本地掩码对噪声结果进行加密;再次,安全聚集端结合该轮迭代中每个客户端的报告值,执行安全聚集与消除掩码操作,然后把聚集结果发送给服务端;最后,服务端结合收集的编码向量与噪声方差自底向上地动态修剪四分树结构。在Beijing、Checkin、NYC和Landmark 4个空间数据集上的实验结果表明,FSP方法在保证客户端隐私的同时,与已有的较好的联邦空间数据发布方法AHH(Adaptive Hierarchical Histograms)相比,在隐私预算为1.8时,FSP的均方误差(MSE)分别降低了3.80%、2.96%、7.51%和14.13%。可见使用FSP方法进行联邦空间数据发布的精度优于同类方法。

关键词：联邦分析分布式差分隐私安全聚集空间数据发布四分树

Next-generation machine vision systems incorporating two-dimensional materials: Progress and perspectives

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InfoMat 2022年第1期4卷 23-39页

作者： Peisong Wu Ting He He Zhu Yang wang Qing Li Zhen wang Xiao Fu Fang wang Peng wang Chongxin Shan Zhiyong Fan Lei Liao Peng Zhou Weida Hu State Key Laboratory of Infrared Physics Shanghai Institute of Technical PhysicsChinese Academy of SciencesShanghaiChina university of Chinese Academy of sciences BeijingChina Hangzhou Institute for Advanced Study University of Chinese Academy of SciencesHangzhouChina State Key Laboratory of ASIC and System School of MicroelectronicsFudan UniversityShanghaiChina henan Key Laboratory of Diamond Optoelectronic Materials and Devices School of Physics and EngineeringZhengzhou UniversityZhengzhouChina Department of Electronic and Computer engineering The Hong Kong University of Science and TechnologyClear Water BayKowloonHong Kong SARChina school of Physics and Electronics Hunan UniversityChangshaChina

Machine vision systems(MVSs)are an important component of intelligent systems,such as autonomous vehicles and ***,with the continuous increase in data and new application scenarios,new requirements are put forward for the next generation of *** is an urgent need to find new material systems to complement the existing semiconductor technology based on thin-film materials,and new architectures must be explored to improve *** of their unique physical properties,two-dimensional(2D)materials have received extensive attention for use in MVSs,especially in biomimetic ones:the human visual system,which can process complex visual information with low power consumption,provides a model for next-generation *** review paper summarizes the progress and challenges of applying 2D material photodetectors in sense-memory-computational integration and biomimetic image sensors for machine vision.

关键词： in-sensor computing machine vision systems photodetectors two-dimensional materials

DNA Processor Modules Enabled Pattern Recognition of Extracellular Vesicles for Facile Cancer Diagnosis

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Chinese Journal of Chemistry 2023年第18期41卷 2269-2274页

作者： Qianyun Yang Ruiyan wang Kun Wu Di Li school of Chemistry and Molecular engineering East China Normal Un iversity500 Dongchuan RoadShanghai 200241China Institute of Biomedical engineering College of Life ScienceQingdao University308 Ningxia RoodQingdooShandong 266071China China Notional Tobacco Quality Supervision&Test Center 6 Cuizhu StreetZhengzhouHenan 450001China

Comprehensive Summary,Extracellular vesicles(EVs)carry rich protein and nucleic acid information of host cells,thus,they are considered to be reliable biomarkers for cancer ***,current EVs detection relies on technical expertise that requires special equipment to readout signals that prevent its point-of-care *** this study,we propose a Pattern Recognition of Molecular in Interest on Single EVs(PROMISE)strategy for clinical EVs *** strategy combines an aptamer-based DNA processor on single EVs,and a color-rendering enzyme to provide a visual output for naked-eyes enabled *** demonstrate 100%accuracy in breast cancer ***,by utilizing thin-layer chromatography(TLC),we achieve a simultaneous screening of two types of cancers(breast and prostate cancer)in one *** PROMISE strategy could serve as a versatile platform for point-of-care EVs diagnosis.

关键词： Extracellular vesicles Cancer diagnosis Single-molecule imaging Point-of-care DNA Protein