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Blind Signal Reception in Downlink Generalized Spatial Modulation Multiuser MIMO System Based on Minimum Output Energy

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Chinese Journal of Electronics 2024年第2期33卷 504-515页

作者： wei-Chiang wu College of Mechanical and Electrical Engineering Sanming University

This paper considers downlink multiuser multiple-input-multiple-output system with parallel spatial modulation scheme, in which base station transmitter antennas are separated into K groups corresponding to K user terminals. Generalized spatial modulation is employed, in which a subset(more than single antenna) of transmit antenna array are activated and the activating pattern corresponds to specific spatial symbol. Different from existing precoding-based algorithms, we develop a two-stage detection scheme at each user terminal: In the pre-processing stage, a minimax algorithm is proposed to identify the indices of active antennas, where the key idea is that the minimum output energy of the detector is maximized; A constrained minimum output energy algorithm is proposed in the post-processing stage to mitigate multiuser interference and extract temporal symbols. Compared with existing precoding-based algorithms, the complexity is significantly reduced. Moreover, the proposed algorithm is semi-blind,in which only a small subset of channel state information is required to identify active antennas as well as eliminate multiuser interference. Simulation results demonstrate that the proposed algorithm is near-far resistant and the spectral efficiency is extensively increased compared to the conventional spatial modulation scheme.

关键词： GSM Spectral efficiency Computer network reliability Transmitting antennas Modulation Symbols Downlink

Novel Adaptive Memory Event-Triggered-Based Fuzzy Robust Control for Nonlinear Networked Systems via the Differential Evolution Algorithm

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IEEE/CAA Journal of Automatica Sinica 2024年第8期11卷 1836-1848页

作者： wei Qian Yanmin wu Bo Shen School of Electrical Engineering and Automation Henan Polytechnic UniversityJiaozuo 454000China College of Information Science and Technology Donghua UniversityShanghai 201620China

This article mainly investigates the fuzzy optimization robust control issue for nonlinear networked systems characterized by the interval type-2(IT2)fuzzy technique under a differential evolution *** provide a more reasonable utilization of the constrained communication channel,a novel adaptive memory event-triggered(AMET)mechanism is developed,where two event-triggered thresholds can be dynamically adjusted in the light of the current system information and the transmitted historical *** conditions with less conservative design of the fuzzy imperfect premise matching(IPM)controller are presented by introducing the Wirtinger-based integral inequality,the information of membership functions(MFs)and slack ***,under the IPM policy,a new MFs intelligent optimization technique that takes advantage of the differential evolution algorithm is first provided for IT2 TakagiSugeno(T-S)fuzzy systems to update the fuzzy controller MFs in real-time and achieve a better system control ***,simulation results demonstrate that the proposed control scheme can obtain better system performance in the case of using fewer communication resources.

关键词： Adaptive memory event-triggered(AMET) differential evolution algorithm fuzzy optimization robust control interval type-2(IT2)fuzzy technique.

P2P energy trading via public power networks:Practical challenges,emerging solutions,and the way forward

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Frontiers in Energy 2023年第2期17卷 189-197页

作者： Yue ZHOU Jianzhong wu wei GAN School of Engineering Cardiff UniversityCardiff CF243AAWalesUK

Peer-to-peer(P2P)energy trading is an emerging energy supply paradigm where customers with distributed energy resources(DERs)are allowed to directly trade and share electricity with each other.P2P energy trading can facilitate local power and energy balance,thus being a potential way to manage the rapidly increasing number of DERs in net zero *** is of great importance to explore P2P energy trading via public power networks,to which most DERs are *** the extensive research on P2P energy trading,there has been little large-scale commercial deployment in practice across the *** this paper,the practical challenges of conducting P2P energy trading via public power networks are identified and presented,based on the analysis of a practical Local Virtual Private Networks(LVPNs)case in North Wales,*** ongoing efforts and emerging solutions to tackling the challenges are then summarized and critically ***,the way forward for facilitating P2P energy trading via public power networks is proposed.

关键词： distribution network local virtual private network network charges peer-to-peer(P2P)energy trading practical implementation

Development of component stiffness equations for thread-fixed one-side bolt connections to an enclosed rectangular hollow section column under tension

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Frontiers of Structural and Civil Engineering 2024年第4期18卷 568-586页

作者： Fu-wei wu Yuan-Qi LI Department of Structural Engineering Tongji UniversityShanghai 200092China State Key Laboratory of Disaster Reduction in Civil Engineering Tongji UniversityShanghai 200092China

The derivation and validation of analytical equations for predicting the tensile initial stiffness of threadfixed one-side bolts(TOBs),connected to enclosed rectangular hollow section(RHS)columns,is presented in this *** unknown stiffness components are considered:the TOBs connection and the enclosed RHS ***,the trapezoidal thread of TOB,as an equivalent cantilevered beam subjected to uniformly distributed loads,is analyzed to determine the associated *** on the findings,the thread-shank serial-parallel stiffness model of TOB connection is *** analysis of the tensile stiffness of the enclosed RHS face due to two bolt forces,the four sidewalls are treated as rotation constraints,thus reducing the problem to a two-dimensional plate *** to the load superposition method,the deflection of the face plate is resolved into three components under various boundary and load *** to the plate deflection theory of Timoshenko,the analytical solutions for the three deflections are derived in terms of the variables of bolt spacing,RHS thickness,height to width ratio,***,the validity of the above stiffness equations is verified by a series of finite element(FE)models of T-stub *** proposed component stiffness equations are an effective supplement to the component-based method.

关键词： initial stiffness component based method thread-fixed one-side bolt rectangular hollow sections analytical equation

Risk factors for developing osteoporosis in diabetic kidney disease and its correlation with calcium-phosphorus metabolism,FGF23,and Klotho

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World Journal of Diabetes 2025年第1期16卷 49-57页

作者： Fan Yang Yan wu wei Zhang Department of Endocrinology Wuhu Second People's HospitalWuhu 241000Anhui ProvinceChina Department of Nephrology Wuhu Second People's HospitalWuhu 241000Anhui ProvinceChina

BACKGROUND The progression of diabetic kidney disease(DKD)affects the patient’s kidney glomeruli and tubules,whose normal functioning is essential for maintaining normal calcium(Ca)and phosphorus(P)metabolism in the *** risk of developing osteoporosis(OP)in patients with DKD increases with the aggravation of the disease,including a higher risk of fractures,which not only affects the quality of life of patients but also increases the risk of *** To analyze the risk factors for the development of OP in patients with DKD and their correlation with Ca-P metabolic indices,fibroblast growth factor 23(FGF23),and *** One hundred and fifty-eight patients with DKD who were admitted into the wuhu Second People’s Hospital from September 2019 to May 2021 were selected and divided into an OP group(n=103)and a normal bone mass group(n=55)according to their X-ray bone densitometry *** data and differences in Ca-P biochemical indices,FGF23,and Klotho were *** correlation of Ca-P metabolic indices with FGF23 and Klotho was discussed,and the related factors affecting OP in patients with DKD were examined by multivariate logistic regression *** The OP group had a higher proportion of females,an older age,and a longer diabetes mellitus duration than the normal group(all P<0.05).Patients in the OP group exhibited significantly higher levels of intact parathyroid hormone(iPTH),blood P,Ca-P product(Ca×P),fractional excretion of phosphate(FeP),and FGF23,as well as lower estimated glomerular filtration rate,blood Ca,24-hour urinary phosphate excretion(24-hour UPE),and Klotho levels(all P<0.05).In the OP group,25-(OH)-D3,blood Ca,and 24-hour UPE were negatively correlated with FGF23 and positively correlated with *** contrast,iPTH,blood Ca,Ca×P,and FeP exhibited a positive correlation with FGF23 and an inverse association with Klotho(all P<0.05).Moreover,25-(OH)-D3,iPTH,blood Ca,FePO4,FGF23,Klotho,age,and female gender were key fa

关键词： Diabetic kidney disease Osteoporosis Calcium-phosphorus metabolism FGF23 Klotho

Smart Local Energy Systems Towards Net Zero:Practice and Implications from the UK

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CSEE Journal of Power and Energy Systems 2023年第2期9卷 411-419页

作者： Jianzhong wu Yue Zhou wei Gan School of Engineering Cardiff UniversityCardiff CF243AAWalesUK.

In transition towards net-zero carbon emissions,a high penetration of renewable power generation and electrification of heat and transport at the grid edge will increase total and peak power consumption significantly with greater uncertainties,thus posing serious challenges to electric power *** local energy systems,which manage distributed energy resources locally with various smart technologies and commercial arrangements,are one of the promising solutions to this *** paper provides a comprehensive review and analysis of the practice of local energy systems in the UK in the context of net-zero *** the macro level,local conditions,local businesses,profitability,investment and whole electricity system impacts of local energy systems are ***,a practical case in North Wales,UK,is analyzed for demonstrating technical,commercial and regulatory arrangements available and needed for setting up a local energy system *** are summarized for providing a useful reference for developing smart local energy systems within and beyond the UK.

关键词： Distributed energy resource microgrid net zero smart local energy system smart grid

The Kernel Dynamics of Convolutional Neural Networks in Manifolds

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Chinese Journal of Electronics 2020年第6期29卷 1185-1192页

作者： wu wei JING Xiaoyuan DU Wencai School of Computer Science Wuhan University Institute of Deep-sea Science and Engineering Chinese Academy of Sciences Institute of Data Science City University of Macau

We propose a novel expression from manifolds to define Convolutional neural network(CNN).The layered structure is proceeded by integration in limited space continuously,with weights adjusted including value and direction in neural *** transfer functions are proposed to simulate the kernel dynamics as a control *** theoretically analyze the stability and controllability of kernel-based CNNs,and verify our findings by numerical experiments.

关键词： convolutional neural nets learning (artificial intelligence) kernel-based CNN convolutional neural network kernel dynamics status transfer functions neural manifolds layered structure Convolutional neural networks Kernelbased convolution Learning dynamics Neural manifolds

Note on a Theorem of Bangert

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Acta Mathematica Sinica,English Series 2012年第1期28卷 121-132页

作者： Tian Jun LI wei wei wu University of Minnesota Department of Mathematics

We generalize Bangert＇s non-hyperbolicity result for uniformly tamed almost complex structures on standard symplectic R^2n to asymptotically standard symplectic manifolds.

关键词： (Non-)complex hyperbolicity asymptotically standard rationally connected almost Kahler

A Study of Microstructure and Mechanical Properties for the Autogenous Single-Pass Butt Weldment of a Ferritic/Martensitic Steel Using Gas Tungsten Arc Welding

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Acta Metallurgica Sinica(English Letters) 2021年第5期34卷 628-638页

作者： Dong wu Shitong wei Shanping Lu CAS Key Laboratory of Nuclear Materials and Safety Assessment Institute of Metal ResearchChinese Academy of SciencesShenyang110016China Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang110016China

A 12%Cr ferritic/martensitic steel,HT-9,has been used as a primary core material for nuclear *** microstructure and mechanical properties of gas tungsten arc butt welded joints of HT-9 in as-welded,and as-tempered conditions have been *** as-welded condition,the fusion zone(FZ)contained a fresh martensite matrix with delta(δ)-***δ-ferrite was rich in Cr and depleted in C compared with the *** heat-aff ected zone(HAZ)could be divided into three areas as the distance from the fusion line increased:δ-ferrite/martensite duplex zone,fully recrystallized zone,and partly recrystallized *** austenitic grains did not coarsen in theδ-ferrite/martensite duplex zone due to the newly nucleatedδ-ferrite grains and incompletely ferritizing(δ-ferrite)during the welding thermal *** weldment microhardness distributed heterogeneously with values above 600 HV_(1.0)in the HAZ and FZ and 250 HV_(1.0)in the base metal(BM).Solute C in the matrix,induced by the dissolution of carbide during the welding process,dominated the microhardness *** toughness was observed in the FZ with a quasi-cleavage fracture tested from-80 to 20℃.The tensile fracture occurred in the relatively soft BM tested from 20 to 600℃.In as-tempered condition(760℃for 1 h),M_(23)C_6-type carbides precipitated within the martensitic laths,the lath boundaries,and theδ-ferrite/martensite ***,V,Cr,Mo-rich nitrides with very small size also precipitated in theδ-ferrite/martensite *** tempering treatment improved the homogenous distribution of weldment hardness *** fracture still occurred in the BM of the weldment specimens tested from 20 to 600℃.The impact toughness improved significantly,but the ductile–brittle transaction temperature was-12℃which was higher than that of the normalized and tempered(N&T)BM.δ-ferrite was considered to be one of the major factors aggravating the impact toughness in the FZ.

关键词： Martensitic stainless steel Gas tungsten arc welding(GTAW) Post-weld heat treatment Microstructure Mechanical properties