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NUDIF: A Non-Uniform Deployment Framework for Distributed Inference in Heterogeneous Edge Clusters

Future Internet 2025年第4期17卷 168-168页

作者： Li, Peng Qing, Chen Liu, Hao National Key Laboratory of Complex Aviation System Simulation Chengdu610036 China Southwest China Institute of Electronic Technology Chengdu610036 China Beijing100876 China

Distributed inference in resource-constrained heterogeneous edge clusters is fundamentally limited by disparities in device capabilities and load imbalance issues. Existing methods predominantly focus on optimizing single-pipeline allocation schemes for partitioned sub-models. However, such approaches often lead to load imbalance and suboptimal resource utilization under concurrent batch processing scenarios. To address these challenges, we propose a non-uniform deployment inference framework (NUDIF), which achieves high-throughput distributed inference service by adapting to heterogeneous resources and balancing inter-stage processing capabilities. Formulated as a mixed-integer nonlinear programming (MINLP) problem, NUDIF is responsible for planning the number of instances for each sub-model and determining the specific devices for deploying these instances, while considering computational capacity, memory constraints, and communication latency. This optimization minimizes inter-stage processing discrepancies and maximizes resource utilization. Experimental evaluations demonstrate that NUDIF enhances system throughput by an average of 9.95% compared to traditional single-pipeline optimization methods under various scales of cluster device configurations. © 2025 by the authors.

关键词： Deep neural networks

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Multi-functional layered double hydroxides supported by nanoporous gold toward overall hydrazine splitting

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Frontiers of Chemical Science and Engineering 2024年第1期18卷 61-69页

作者： Yongji Qin Huijie Cao Qian Liu Shaoqing Yang Xincai Feng Hao Wang Meiling Lian Dongxing Zhang Hua Wang Jun Luo Xijun Liu ShenSi Lab Shenzhen Institute for Advanced StudyUniversity of Electronic Science and Technology of ChinaShenzhen 518110China Institute for New Energy Materials and Low-Carbon Technologies School of Materials Science and EngineeringTianjin University of TechnologyTianjin 300384China State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured MaterialsSchool of ResourcesEnvironment and MaterialsGuangxi UniversityNanning 530004China Institute for Advanced Study Chengdu UniversityChengdu 610106China China National Coal Group Corporation Beijing 100120China Tianjin Engineering Research Center of Civil Aviation Energy Environment and Green Development School of Transportation Science and EngineeringCivil Aviation University of ChinaTianjin 300300China

Layered double hydroxides have demonstrated great potential for the oxygen evolution reaction,which is a crucial half-reaction of overall water ***,it remains challenging to apply layered double hydroxides in other electrochemical reactions with high efficiency and ***,we report two-dimensional multifunctional layered double hydroxides derived from metalorganic framework sheet precursors supported by nanoporous gold with high porosity,which exhibit appealing performances toward oxygen/hydrogen evolution reactions,hydrazine oxidation reaction,and overall hydrazine *** as-prepared catalyst only requires an overpotential of 233 mV to reach 10 mA·cm^(-2) toward oxygen evolution *** overall hydrazine splitting cell only needs a cell voltage of 0.984 V to deliver 10 mA·cm^(-2),which is far more superior than that of the overall water splitting system(1.849 V).The appealing performances of the catalyst can be contributed to the synergistic effect between the metal components of the layered double hydroxides and the supporting effect of the nanoporous gold substrate,which could endow the sample with high surface area and excellent conductivity,resulting in superior activity and stability.

关键词： layered double hydroxide oxygen evolution reaction hydrazine oxidation reaction overall hydrazine splitting hydrogen production

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Modeling high-speed cutting of SiC_(p)/Al composites using a semi-phenomenologically based damage model

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Chinese Journal of Aeronautics 2021年第8期34卷 218-229页

作者： Junfeng XIANG Lijing XIE Feinong GAO School of Civil Aviation Northwestern Polytechnical UniversityXi'an 710072China Key Laboratory of Fundamental Science for Advanced Machining Beijing Institute of TechnologyBeijing 100081China

In this paper,we attempts to investigate cutting mechanisms in high-speed cutting of Al6061/Si C_(p)/15p composites using a semi-phenomenologically based damage model in the equivalent homogeneous material(EHM)*** combining macroscale EHM modeling and underlying microscale physical mechanisms,a feasible semi-phenomenological plastic model is proposed for prediction of cutting forces and chip morphology during high-speed turning Al6061/Si C_(p)/15p *** model incorporates the modified Weibull weakest-link effect to represent the strain-based damage evolution in large *** proposed semi-phenomenological constitutive model is implemented by compiling material subroutines into cutting finite element(FE)*** effects of the critical shear stresses on chip formation that depend on the toolchip frictional coefficient are accounted for in the cutting FE *** chip formation mechanism affecting material removal behaviors during high-speed turning is further *** capabilities of the proposed constitutive model are evaluated by comparing cutting forces and chip morphologies between experiments and simulations at different cutting speeds associated with strain *** EHM-based and microstructure-based models are further compared in both computational efficiency and *** simulation results show that the developed semiphenomenological constitutive formalism and cutting model are promising and efficient tools for further investigation of dynamic mechanical and cutting behaviors of particle-reinforced composites with different volume fraction and particle size.

关键词： Chip morphology Damage evolution High-speed cutting Semi-phenomenological plasticity SiC_(p)/Al composites

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Single-image super-resolution of gamma-ray imaging system using deep denoiser prior based on plug-and-play framework

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Matter and Radiation at Extremes 2025年第2期10卷 56-70页

作者： Guo-Guang Li Liang Sheng Bao-Jun Duan Yang Li Yan Song Zi-Jian Zhu Wei-Peng Yan Dong-Wei Hei Qing-Zi Xing Key Laboratory of Particle and Radiation Imaging(Tsinghua University) Ministry of EducationBeijing 100084China Laboratory for Advanced Radiation Sources and Application Tsinghua UniversityBeijing 100084China Department of Engineering Physics Tsinghua UniversityBeijing 100084China State Key Laboratory of Intense Pulsed Radiation Simulation and Effect Northwest Institute of Nuclear TechnologyXi’an 710024China

Gamma-ray imaging systems are powerful tools in radiographic ***,the recorded images suffer from degradations such as noise,blurring,and downsampling,consequently failing to meet high-precision diagnostic *** this paper,we propose a novel single-image super-resolution algorithm to enhance the spatial resolution of gamma-ray imaging systems.A mathematical model of the gamma-ray imaging system is established based on maximum a posteriori *** the plug-and-play framework,the half-quadratic splitting method is employed to decouple the data fidelit term and the regularization *** image denoiser using convolutional neural networks is adopted as an implicit image prior,referred to as a deep denoiser prior,eliminating the need to explicitly design a regularization ***,the impact of the image boundary condition on reconstruction results is considered,and a method for estimating image boundaries is *** results show that the proposed algorithm can effectively addresses boundary *** increasing the pixel number of the reconstructed images,the proposed algorithm is capable of recovering more ***,in both simulation and real experiments,the proposed algorithm is demonstrated to achieve subpixel resolution,surpassing the Nyquist sampling limit determined by the camera pixel size.

关键词： deep denoiser prior enhance spatial resolution maximum posteriori estimationwithin radiographic diagnosishoweverthe maximum posteriori estimation gamma ray imaging plug play framework recorded images

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Real Time simulation Modeling Method for Controllable Self Recovery Energy Dissipation Device

Real Time Simulation Modeling Method for Controllable Self R...

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2023 International Conference on Power System technology, PowerCon 2023

作者： Xie, Minhua Gao, Lu Ji, Feng Lin, Chang Yan, Heming Lin, Junjie State Grid Smart Grid Research Institute Co. Ltd State Key Laboratory of Advanced Transmission Technology Beijing China State Grid Smart Grid Research Institute Co. Ltd Laboratory of Dc Grid Technology & Simulation Beijing China

ISBN: (纸本)9798350300222

In order to avoid equipment damage or valve breakdown caused by power surplus during AC system short-circuit faults in the hybrid cascaded ultra HVDC, the controllable and adaptive energy absorption device is installed parallel with the MMC converter valve. To accurately simulate the characteristics of the system and test the control and protection hardware in the loop, the small time-step real-time simulation is needed. In order to achieve the small time-step real-time simulation of the whole system including nonlinear controllable energy absorption device, a small inductor is used to separate the nonlinear network from the linear network based on equivalent transmission line method. The nonlinear subnetwork is solved using Newton-Raphson iteration method and the linear system is linearly solved. The comparison results show that the proposed method is high efficient and precise. © 2023 IEEE.

关键词： Energy absorption

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Incorporation of nano/micron-SiC particles in Ni-based composite coatings towards enhanced mechanical and anti-corrosion properties

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International Journal of Minerals,Metallurgy and Materials 2022年第1期29卷 153-160页

作者： Bowei Zhang Qiao Zhang Zhan Zhang Kui Xiao Qiong Yao Guojia Ma Gang Sun Junsheng Wu Institute for advanced materials and technology University of Science and Technology BeijingBeijing 100083China National Materials Corrosion and Protection Data Center University of Science and Technology BeijingBeijing 100083China Key Laboratory of Space Lauching Site Reliability Technology Haikou 571000China Department of Materials Application Research China Aviation Manufacturing Technology InstituteBeijing 100024China

Ni-based composite coatings incorporated with nano/micron SiC particles were fabricated via electrochemical co-deposition in Watts bath,followed by the evaluation of their mechanical and anti-corrosion *** micrographic observations suggest that the SiC particles with various sizes can be well incorporated to the Ni substrate.X-ray diffraction(XRD)patterns indicate that SiC particles with smaller sizes could weaken the preferential growth of Ni along(200)*** addition,it is found that the incorporated SiC particles with medium micron sizes(8 and 1.5μm)could significantly enhance the micro-hardness of the Ni composite ***,electrochemical measurements demonstrate that micron-sized SiC particles would weaken the corrosion resistance of Ni composite coatings ascribed to the structure defects *** contrast,the combined incorporation of nanosized(50 nm)SiC particles with medium micron(1.5μm)ones is capable of promoting the compactness of the composite coatings,which is beneficial to the long-term corrosion resistance with negligible micro-hardness loss.

关键词： Watts bath Ni coating SiC particles corrosion resistance electrodeposition

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STUDY ON REACTOR CAVITY COOLING SYSTEM OF HTR-PM IN DLOFC ACCIDENT WITH TIN-CAVCO CODE AND SPECTRA CODE 31

STUDY ON REACTOR CAVITY COOLING SYSTEM OF HTR-PM IN DLOFC AC...

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2024 31st International Conference on Nuclear Engineering, ICONE 2024

作者： Xu, Xinsheng Ye, Yiyang Zheng, Yanhua Stempniewicz Marek, M. Institute of Nuclear and New Energy Technology Collaborative Innovation Center of Advanced Nuclear Energy Technology Key Laboratory of Advanced Reactor Engineering and Safety of Ministry of Education Tsinghua University Beijing100084 China CAEP Software Center for High Performance Numerical Simulation Beijing China NRG Utrechtseweg 310 Arnhem/Westerduinweg 3 Petten Netherlands

ISBN: (纸本)9780791888261

High Temperature Gas-cooled Reactor (HTGR) is recognized by the international nuclear power industry as a safe type of reactor. The modular pebble-bed high temperature gas-cooled reactor uses reactor modules with relatively small thermal power between 200-600MWt, utilizing the high-temperature resistance that can be achieved by coated fuel particles. Institute of Nuclear and New Energy technology (INET) of Tsinghua University has developed a commercial-scale 200 MWe High Temperature gas-cooled Reactor Pebble-bed Module project (HTR-PM). The decay heat can be removed by natural mechanism, such as thermal radiation, heat conductivity, natural convection, thereby guaranteeing the safety of reactor under accident and eliminating the possibility of core melting. A passive Reactor Cavity Cooling System (RCCS) has been designed for HTR-PM to ensure the safety of the Reactor Pressure Vessel (RPV) and reactor cavity under normal operation and accident conditions. RCCS transfers heat from pressure vessels to the atmosphere through thermal radiation, heat conduction, and natural convection, and the system utilizes passive mechanism with high safety and reliability. The RCCS of HTR-PM has been designed as three independent sets. According to the preliminary design, two sets work can guarantee the safety of the PRV and reactor cavity. In this paper, the working performance of RCCS under depressurized loss of forced cooling (DLOFC) accident has been analyzed by INET with TIN-CAVCO code, and also by NRG with SPECTRA code. The analysis results of these two codes are in good agreement, proving the applicability of both codes in analysis of the HTGR as well as its RCCS. During the accidents, the maximal fuel temperature keeps below the limitation of 1620℃. The results also prove the excellent performance of the RCCS. The RCCS meets the design requirements, that is the normal operation of two sets can effectively ensure the safety of the pressure vessel and the reactor cavity during t

关键词： Gas cooled reactors

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Summary of the 10th Conference on Magnetically Confined Fusion Theory and simulation(CMCFTS)

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Plasma Science and technology 2023年第8期25卷 1-11页

作者：王志斌仇志勇王璐陈伟 Sino-French Institute of Nuclear Engineering and Technology Sun Yat-sen UniversityZhuhai 519082People's Republic of China Institute for Fusion Theory and Simulation Zhejiang UniversityHangzhou 310027People's Republic of China International Joint Research Laboratory of Magnetic Confinement Fusion and Plasma Physics State Key Laboratory of Advanced Electromagnetic Engineering and TechnologySchool of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074People's Republic of China Southwestern Institute of Physics Chengdu 610041People's Republic of China

This paper gives a summary of the organization and the presentations delivered at the 10th Conference on Magnetically Confined Fusion Theory and simulation(CMCFTS)held in Zhuhai,China,from 28th to 31st October *** conference focused on the latest progress in the research of the magnetic confined fusion plasma theory and simulations,as well as the largescale numerical simulation techniques developed in recent *** conference is held both online and offline,with about 110 domestic participants from 18 institutes participating in the live conference,and the statistical data from the live broadcast platform indicated that the online conference attracted over 20000 views per day.A summary of the conference is given,and the history of the CMCFTS is presented.A brief introduction to the poster section is also included in this paper.

关键词： CMCFTS magnetically confined fusion theory simulation conference report

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Accelerating ab initio real-space electronic structure calculations for low-dimensional materials using an atom-sphere grid truncation method

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Physical Review B 2024年第15期110卷 155157页

作者： Lantian Xue Qiang Xu Cheng Ma Wenhui Mi Yanchao Wang Yu Xie Yanming Ma Key Laboratory of Material Simulation Methods & Software of Ministry of Education College of Physics State Key Lab of Superhard Materials College of Physics International Center of Future Science Key Laboratory of Physics and Technology for Advanced Batteries of Ministry of Education College of Physics

In recent decades, the real-space finite-difference implementations of Kohn–Sham density functional theory have exhibited substantial improvements in computational efficiency for large-scale systems. However, the substantial memory consumption arising from the numerous grid points has begun to limit the widespread adoption of this method. In this study, a general method is presented—applicable to both periodic and Dirichlet boundary conditions—to reduce the number of real-space grids. This approach introduces a truncation of the real-space grids based on atomic positions, which reduces memory requirements and enables a more efficient real-space scheme tailored for simulating low-dimensional and porous materials with uneven spatial distributions. By testing the method on zero-dimensional clusters, one-dimensional tubes, two-dimensional clusters adsorbed on graphene, and three-dimensional metal-organic framework materials, a 30–73% reduction in grid points and a 36–71% reduction in computational time per step are observed for simulations with a 2 meV/atom energy difference.

关键词： Electronic structure Density functional theory development First-principles calculations Numerical techniques

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Overvoltage Suppression Strategy Based on Active Control of Current for Half-Wave Commutated Modular Multilevel Converters 14

Overvoltage Suppression Strategy Based on Active Control of ...

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14th International Conference on Power and Energy Systems, ICPES 2024

作者： Liu, Bao Xu, Yunfei Zhao, Guoliang Fu, Nan Jia, Chen China Electric Power Research Institute State Key Laboratory of Advanced Power Transmission Technology Beijing China Tsinghua University State Key Laboratory of Control and Simulation of Power System and Generation Equipment Beijing China Electric Power Research Institute State Grid Liaoning Electric Power Co. Ltd. Shenyang China

ISBN: (纸本)9798350391329

Flexible low-frequency AC transmission technology combines the advantages of 50 Hz AC transmission and DC transmission, and has good application scenarios. High voltage and large capacity AC/AC converters are the core equipment of flexible low-frequency AC transmission systems. The proposal of half-wave commutated modular multilevel converters effectively reduces the number of components and improves system economy. In view of this, this paper proposes an overvoltage suppression strategy for active control of inductor current, which effectively reduces the overvoltage level during commutation. The article first introduces the sparse topology and mathematical model of the half-wave commutated modular multilevel converters. Secondly, the mechanism of overvoltage generation is analyzed. Then, overvoltage suppression strategies are proposed. Finally, a PSCAD simulation model is built to verify the effectiveness and feasibility of the proposed method through simulation. © 2024 IEEE.

关键词： Flexible AC transmission systems

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