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Low-Cost Federated Broad Learning for Privacy-Preserved Knowledge Sharing in the RIS-Aided Internet of Vehicles

Engineering 2024年第2期33卷 178-189页

作者： xiaoming yuan Jiahui Chen Ning Zhang Qiang(John)Ye Changle Li Chunsheng Zhu Xuemin Sherman Shen Qinhuangdao Branch Campus Northeastern UniversityQinhuangdao 066004China State Key Laboratory of Integrated Services Networks&the Research Institute of Smart Transportation Xidian UniversityXi’an 710071China Department of Electrical and Computer Engineering University of WindsorWindsorON N9B 3P4Canada Department of Electrical and Software Engineering University of CalgaryCalgaryAB T2N 1N4Canada SUSTech Institute of Future Networks Southern University of Science and TechnologyShenzhen 518055China Department of Electrical and Computer Engineering University of WaterlooWaterlooON N2L 3G1Canada

High-efficiency and low-cost knowledge sharing can improve the decision-making ability of autonomous vehicles by mining knowledge from the Internet of Vehicles(IoVs).However,it is challenging to ensure high efficiency of local data learning models while preventing privacy leakage in a high mobility environment.In order to protect data privacy and improve data learning efficiency in knowledge sharing,we propose an asynchronous federated broad learning(FBL)framework that integrates broad learning(BL)into federated learning(FL).In FBL,we design a broad fully connected model(BFCM)as a local model for training client data.To enhance the wireless channel quality for knowledge sharing and reduce the communication and computation cost of participating clients,we construct a joint resource allocation and reconfigurable intelligent surface(RIS)configuration optimization framework for FBL.The problem is decoupled into two convex subproblems.Aiming to improve the resource scheduling efficiency in FBL,a double Davidon–Fletcher–Powell(DDFP)algorithm is presented to solve the time slot allocation and RIS configuration problem.Based on the results of resource scheduling,we design a reward-allocation algorithm based on federated incentive learning(FIL)in FBL to compensate clients for their costs.The simulation results show that the proposed FBL framework achieves better performance than the comparison models in terms of efficiency,accuracy,and cost for knowledge sharing in the IoV.

关键词： Knowledge sharing Internet of Vehicles Federated learning Broad learning Reconfigurable intelligent surfaces Resource allocation

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Study regarding typical liquefaction damage during the 2021 Maduo M_(s)7.4 earthquake in China

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Earthquake Engineering and Engineering Vibration 2023年第4期22卷 895-908页

作者： yuan Jinyuan Wang Yunlong Ma Jiajun Zhan Beilei yuan xiaoming Wang Lanmin Wu Xiaoyang School of Civil Engineering Heilongjiang University of Science and TechnologyHarbin 150027China Key Laboratory of Earthquake Engineering and Engineering Vibration Institute of Engineering MechanicsChina Earthquake AdministrationKey Laboratory of Earthquake Disaster MitigationMinistry of Emergency ManagementHarbin 150080China Qinghai Earthquake Agency China Earthquake AdministrationXining 810001China Lanzhou Institute of Seismology China Earthquake AdministrationLanzhou 730000China

The most important method of understanding liquefaction-induced engineering failures comes from the investigation and analysis of earthquake damage.In May 2021,the Maduo M_(s)7.4 earthquake occurred on the Tibetan Plateau of China.The most representative engineering disaster caused by this earthquake was bridge damage on liquefied sites.In this study,the mutual relationships between the anti-liquefaction pre-design situation,the ground motion intensity,the site liquefaction severity,and the bridge damage state for this earthquake were systematically analyzed for typical bridge damage on the liquefied sites.Using field survey data and the current Chinese industry code,simulations of the liquefaction scenarios at typical bridge sites were performed for the pre-design seismic ground motion before the earthquake and the seismic ground motion during the earthquake.By combining these results with post-earthquake investigation results,the reason for the serious bridge damage resulting from this earthquake is revealed,and the necessary conditions for avoiding serious seismic damage to bridges built in liquefiable sites is presented.

关键词： seismic liquefaction Maduo M_(s)7.4 earthquake bridge damage seismic code

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A whole-space transform formula of cylindrical wave functions for scattering problems

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Earthquake Engineering and Engineering Vibration 2014年第1期13卷 23-28页

作者： yuan xiaoming Institute of Engineering Mechanics China Earthquake Administration

The theory of elastic wave scattering is a fundamental concept in the study of elastic dynamics and wave motion,and the wave function expansion technique has been widely used in many subjects.To supply the essential tools for solving wave scattering problems induced by an eccentric source or multi-sources as well as multi-scatters,a whole-space transform formula of cylindrical wave functions is presented and its applicability to some simple cases is demonstrated in this study.The transforms of wave functions in cylindrical coordinates can be classifi ed into two basic types: interior transform and exterior transform,and the existing Graf’s addition theorem is only suitable for the former.By performing a new replacement between the two coordinates,the exterior transform formula is fi rst deduced.It is then combined with Graf’s addition theorem to establish a whole-space transform formula.By using the whole-space transform formula,the scattering solutions by the sources outside and inside a cylindrical cavity are constructed as examples of its application.The effectiveness and advantages of the whole-space transform formula is illustrated by comparison with the approximate model based on a large cycle method.The whole-space transform formula presented herein can be used to perform the transform between two different cylindrical coordinates in the whole space.In addition,its concept and principle are universal and can be further extended to establish the coordinate transform formula of wave functions in other coordinate systems.

关键词： scattering transform of wave functions whole-space transform eccentric source multi-sources multi-scatters

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基于内电势幅值/频率和网络有功/无功电流工作点的变换器并网交流系统小扰动线性化方法

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中国电机工程学报 2024年第3期44卷 1081-1093,I0019页

作者：王思成袁小明强电磁工程与新技术国家重点实验室(华中科技大学) 湖北省武汉市430074

当今电力系统不明机理的振荡问题频发,亟需回归振荡的能量交换本质以认识和分析系统动态过程。系统受扰后设备将根据输入和输出有功/无功功率或电流不平衡调节内电势频率和幅值,进而调节网络中各设备端口有功/无功电流及设备输出功率。... 详细信息

当今电力系统不明机理的振荡问题频发,亟需回归振荡的能量交换本质以认识和分析系统动态过程。系统受扰后设备将根据输入和输出有功/无功功率或电流不平衡调节内电势频率和幅值,进而调节网络中各设备端口有功/无功电流及设备输出功率。在此闭环动态过程中内电势幅值/频率对应的设备储能与有功/无功电流对应的网络储能将在一定水平上彼此交换。因此,系统动态分析的工作点和相应的小扰动数学关系应当基于表征系统储能水平的内电势幅值/频率和有功/无功电流来进行确定和构建。然而,现有研究仍然缺乏对交流系统动态过程能量内涵的认识,目前尚未从能量角度开展认识和分析交流系统动态过程的相关工作。鉴于此,该文旨在提出基于内电势幅值/频率和有功/无功电流工作点的交流电力系统小扰动线性化方法。首先以变换器并网交流系统为例,从系统基本结构及其传输有功/无功的闭环运行原理出发,通过阐述在系统受扰后内电势幅值/频率和有功/无功电流不断迭代更新的闭环动态过程中变换器和网络在一定储能水平上相互交换有功/无功的机制,明确内电势幅值/频率和有功/无功电流的稳态直流量是交流系统的工作点,并澄清其所蕴含的有功/无功存储水平物理内涵。基于内电势幅值/频率和有功/无功电流工作点,该文提出描述变换器/网络的内电势幅值/频率和有功/无功电流间的激励-响应小扰动非线性关系及其线性化的物理认识和相应的线性化方法,然后结合仿真说明系统小扰动线性化关系的适用性,最终阐释小扰动初期交、直流电气量的动态演化行为。

关键词：交流系统系统振荡小扰动线性化工作点

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加拿大科研数据管理生态系统实践及启示

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新世纪图书馆 2024年第1期 90-96页

作者：袁晓明苏州大学图书馆江苏苏州215006

国家协调统筹的科研数据管理机制对科研数据的保存和共享具有重要意义。论文从生态系统视角调研法分析了加拿大建立国家科研数据管理现状及实施方案,从制定科研数据管理系统、提供基础服务支撑、构建科研数据管理平台、优化元数据标准... 详细信息

国家协调统筹的科研数据管理机制对科研数据的保存和共享具有重要意义。论文从生态系统视角调研法分析了加拿大建立国家科研数据管理现状及实施方案,从制定科研数据管理系统、提供基础服务支撑、构建科研数据管理平台、优化元数据标准、数据保存和共享等方面阐述了其具体举措。针对我国科研数据管理现状,论文提出从管理机制、平台建设和数据集成三个层面快速布局国家科研数据管理体系的建议。

关键词：科研数据生态系统数据管理和共享

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地震荷载作用下土体变形试验研究

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地震工程与工程振动 2024年第3期44卷 157-163页

作者：孟凡超袁晓铭防灾科技学院河北三河065201 河北省地震灾害防御与风险评价重点实验室河北三河065201 中国地震局工程力学研究所地震工程与工程振动重点实验室黑龙江哈尔滨150080 地震灾害防治应急管理部重点实验室黑龙江哈尔滨150080

为研究不规则地震荷载对土体变形特性的影响,对砂土试样开展了系统的动三轴试验。试验中分别对3种不同密度砂土试样施加了4条具有不同峰值的不规则地震应力时程及其循环次数为20周的等幅正弦荷载,以便开展对比研究。结果表明:在地震荷... 详细信息

为研究不规则地震荷载对土体变形特性的影响,对砂土试样开展了系统的动三轴试验。试验中分别对3种不同密度砂土试样施加了4条具有不同峰值的不规则地震应力时程及其循环次数为20周的等幅正弦荷载,以便开展对比研究。结果表明:在地震荷载及其等幅循环荷载输入下,砂土试样的应变增长曲线差异显著,荷载类型及荷载波形是影响土单元应变时程发展特征的主要因素。考虑荷载不规则性得到的修正系数受荷载类型和砂土相对密实度的影响,不受输入荷载动应力幅值大小及砂土类型的影响。最后针对地震荷载下土单元变形的计算,给出了以常规的等幅三轴变形试验为依据的估算方法。

关键词：地震荷载变形特性等幅往返荷载修正系数估算方法

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A phase model for point spread function estimation in ground-based astronomy

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Science China Mathematics 2013年第12期56卷 2701-2710页

作者： CHAN Raymond Honfu yuan xiaoming ZHANG WenXing Department of Mathematics The Chinese University of Hong Kong Department of Mathematics Hong Kong Baptist University School of Mathematical Sciences University of Electronic Science and Technology of China

In ground-based astronomy,images of objects in outer space are acquired via ground-based telescopes.However,the imaging system is generally interfered by atmospheric turbulence and hence images so acquired are blurred with unknown point spread function(PSF).To restore the observed images,aberration of the wavefront at the telescope’s aperture,i.e.,the phase,is utilized to derive the PSF.However,the phase is not readily available.Instead,its gradients can be collected by wavefront sensors.Thus the usual approach is to use regularization methods to reconstruct high-resolution phase gradients and then use them to recover the phase in high accuracy.Here,we develop a model that reconstructs the phase directly.The proposed model uses the tight frame regularization and it can be solved efciently by the Douglas-Rachford alternating direction method of multipliers whose convergence has been well established.Numerical results illustrate that our new model is efcient and gives more accurate estimation for the PSF.

关键词：相位模型点扩散函数函数估计陆基天文生日相位梯度波前传感器

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电液3-UPS/S并联稳定平台参数振动特性分析

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振动与冲击 2024年第5期43卷 52-61页

作者：袁晓明王维锜庞浩东张立杰燕山大学河北省重型机械流体动力传输与控制实验室河北秦皇岛066004 燕山大学先进锻压成形技术与科学教育部重点实验室河北秦皇岛066004

针对电液3-UPS/S并联稳定平台驱动液压缸的压力脉动所产生的参数振动,建立了稳定平台的参数振动方程并利用多尺度法求解了主共振响应与组合共振响应的一次近似解;分析了主共振与组合共振响应特性以及振动幅值在初始工作空间内的变化规律... 详细信息

针对电液3-UPS/S并联稳定平台驱动液压缸的压力脉动所产生的参数振动,建立了稳定平台的参数振动方程并利用多尺度法求解了主共振响应与组合共振响应的一次近似解;分析了主共振与组合共振响应特性以及振动幅值在初始工作空间内的变化规律,最后采用四阶龙格库塔法与模态试验对参数振动模型进行验证。结果表明:数值解与理论解之间的最大误差为4.20%,固有频率理论值与试验值之间的最大误差为4.66%,可验证参数振动模型的正确性。

关键词：电液3-UPS/S并联稳定平台压力脉动参数振动多尺度法振动特性

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Risk-taking path choice behaviors under ATIS in transportation networks with demand uncertainty

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Journal of Southeast University(English Edition) 2008年第S1期24卷 43-48页

作者： Shao, Hu Tian, Qiong yuan, xiaoming Wang, Guodong School of Sciences China University of Mining and Technology Xuzhou 221116 China School of Economics and Management Beijing University of Aeronautics and Astronautics Beijing 100083 China Antai College of Economics and Management Shanghai Jiaotong University Shanghai 200052 China

A new travel time reliability-based traffic assignment model is proposed to investigate the effects of an advanced transportation information system (ATIS) on drivers' risk-taking path choice behaviours in transportation networks with demand uncertainty. In the model, drivers are divided into two classes. The first class is not equipped with ATIS, while the second class is equipped with ATIS. Different risk-taking path choice behaviours of the two classes are studied, respectively. A corresponding mixed equilibrium traffic assignment model is formulated as a variational inequality problem in terms of path flows, which is solved by a heuristic solution algorithm. Numerical results indicate that the ATIS can influence the drivers' risk-taking path choice behaviours and the total system travel time in transportation networks with demand uncertainty. It is also found that under higher demand levels, the benefits of ATIS for network performance enhancement may be more obvious.

关键词： risk-taking path choice behaviours advanced transportation information system (ATIS) demand uncertainty traffic assignment problem variational inequality

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A proximal point algorithm revisit on the alternating direction method of multipliers

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Science China Mathematics 2013年第10期56卷 2179-2186页

作者： CAI XingJu GU GuoYong HE BingSheng yuan xiaoming Department of Mathematics Nanjing University Department of Mathematics Hong Kong Baptist University

The alternating direction method of multipliers(ADMM)is a benchmark for solving convex programming problems with separable objective functions and linear constraints.In the literature it has been illustrated as an application of the proximal point algorithm(PPA)to the dual problem of the model under consideration.This paper shows that ADMM can also be regarded as an application of PPA to the primal model with a customized choice of the proximal parameter.This primal illustration of ADMM is thus complemental to its dual illustration in the literature.This PPA revisit on ADMM from the primal perspective also enables us to recover the generalized ADMM proposed by Eckstein and Bertsekas easily.A worst-case O(1/t)convergence rate in ergodic sense is established for a slight extension of Eckstein and Bertsekas’s generalized ADMM.

关键词：交替方向法邻近点算法乘子法应用程序 PPA 线性约束目标函数对偶问题

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