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Development of a subchannel code for blockage accidents of LMFRs based on the 3D fuel rod model

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Nuclear Science and Techniques 2022年第3期33卷 30-44页

作者： xiao luo Lian-Kai Cao Wen-Pei feng Hong-Li Chen School of Nuclear Science and Technology University of Science and Technology of ChinaHefei 230026China

To predict the thermal-hydraulic(T/H)parameters of the reactor core for liquid-metal-cooled fast reactors(LMFRs),especially under flow blockage accidents,we developed a subchannel code called *** code uses a time-dependent,four-equation,singlephase flow model together with a 3D heat conduction model for the fuel rods,which is solved by numerical methods based on the finite difference method with a staggered *** to the local effect of the blockage on the flow field,low axial flow,increased forced crossflow,and backflow *** more accurately simulate this problem,we implemented a robust and novel solution *** verified the code with a low-flow(~0.01 m/s)and large-scale blockage *** the preliminary validation,we compared our results with the experimental data of the NACIE-UP BFPS blockage test and the KIT19ROD blockage *** results revealed that KMC-FB has sufficient solution accuracy and can be used in future flow blockage analyses for LMFRs.

关键词： Subchannel method Code development Blockage accident Liquid-metal-cooled fast reactor

Simultaneous embolization of a spontaneous porto-systemic shunt and intrahepatic arterioportal fistula:A case report

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World Journal of Clinical Cases 2021年第31期9卷 9577-9583页

作者： Guo-feng Liu xiao-Ze Wang Xue-feng luo Department of Gastroenterology and Hepatology Sichuan University-University of Oxford Huaxi Joint Centre for Gastrointestinal CancerWest China HospitalSichuan UniversityChengdu 610041Sichuan ProvinceChina

BACKGROUND Hepatic encephalopathy(HE)is a frequent and debilitating complication of chronic liver *** HE is strongly linked with spontaneous portosystemic shunts(SPSSs).Intrahepatic arterioportal fistulas(IAPFs)occur rarely but pose a major clinical challenge and may lead to or worsen portal ***,we present a rare case of recurrent HE secondary to a SPSS combined with an *** SUMMARY A 63-year-old female with primary biliary cirrhosis presented with recurrent disturbance of consciousness for 4 *** communicating the superior mesenteric vein with the inferior vena cava and IAPF linking the intrahepatic artery with the portal vein were found on contrast-enhanced abdominal computed *** patient did not respond well to medical ***,simultaneous embolization of SPSS and IAPF was *** embolization,the symptoms of HE showed obvious *** The presence of liver vascular disorders should not be neglected in patients with chronic liver disease,and interventional therapy is a reasonable choice in such patients.

关键词： Spontaneous portosystemic shunts Intrahepatic arterioportal fistula Endovascular embolization Hepatic encephalopathy Liver disease Case report

Low-field NMR inversion based on low-rank and sparsity restraint of relaxation spectra

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Petroleum Science 2022年第6期19卷 2741-2756页

作者： Si-Hui luo Li-Zhi xiao Yan Jin Jiang-feng Guo xiao-Bo Qu Zhang-Ren Tu Gang luo Can Liang College of Artificial Intelligence and College of Petroleum Engineering China University of PetroleumBeijing102249China State Key Laboratory of Petroleum Resources and Prospecting China University of PetroleumBeijing102249China School of Electronic Science and Engineering(National Model Microelectronics College) Xiamen UniversityFujian361005China School of Electronic Science and Engineering National Model Microelectronics College Xiamen University Changzhou Institute of Technology ChangzhouJiangsu213000China

In this paper,we proposed a novel method for low-field nuclear magnetic resonance(NMR)inversion based on low-rank and sparsity restraint(LRSR)of relaxation spectra,with which high quality construction is made possible for one-and two-dimensional low-field and low signal to noise ratio NMR *** this method,the low-rank and sparsity restraints are introduced into the objective function instead of the smoothing *** low-rank features in relaxation spectra are extracted to ensure the local characteristics and morphology of *** sparsity and residual term are contributed to the resolution and precision of spectra,with the elimination of the redundant relaxation *** process of the objective function is designed with alternating direction method of multiples,in which the objective function is decomposed into three subproblems to be independently *** optimum solution can be obtained by alternating iteration and updating *** first,numerical simulations are conducted on synthetic echo data with different signal-to-noise ratios,to optimize the desirable regularization parameters and verify the feasibility and effectiveness of proposed ***,NMR experiments on solutions and artificial sandstone samples are conducted and analyzed,which validates the robustness and reliability of the proposed *** results from simulations and experiments have demonstrated that the suggested method has unique advantages for improving the resolution of relaxation spectra and enhancing the ability of fluid quantitative identification.

关键词： Low-field NMR Inversion method Low-rank and sparsity restraint Relaxation spectra Data processing

Boosting Oxygen Evolution Reaction Performance on NiFe‑Based Catalysts Through d‑Orbital Hybridization

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Nano-Micro Letters 2025年第1期17卷 281-292页

作者： Xing Wang Wei Pi Sheng Hu Haifeng Bao Na Yao Wei luo State Key Laboratory of New Textile Materials and Advanced Processing Technology Key Laboratory of New Textile Materials and Applications of Hubei ProvinceSchool of Materials Science and EngineeringWuhan Textile UniversityWuhan 430200People’s Republic of China College of Chemistry and Molecular Sciences Wuhan UniversityWuhan 430072People’s Republic of China

Anion-exchange membrane water electrolyzers(AEMWEs)for green hydrogen production have received intensive attention due to their feasibility of using earth-abundant NiFe-based *** introducing a third metal into NiFe-based catalysts to construct asymmetrical M-NiFe units,the d-orbital and electronic structures can be adjusted,which is an important strategy to achieve sufficient oxygen evolution reaction(OER)performance in ***,the ternary NiFeM(M:La,Mo)catalysts featured with distinct M-NiFe units and varying d-orbitals are reported in this *** and theoretical calculation results reveal that the doping of La leads to optimized hybridization between d orbital in NiFeM and 2p in oxygen,resulting in enhanced adsorption strength of oxygen intermediates,and reduced rate-determining step energy barrier,which is responsible for the enhanced OER *** critically,the obtained NiFeLa catalyst only requires 1.58 V to reach 1 A cm^(−2) in an anion exchange membrane electrolyzer and demonstrates excellent long-term stability of up to 600 h.

关键词： NiFe-based catalysts d-orbital coupling Oxygen evolution reaction Anion exchange membrane electrolyzer

战略对抗演习系统中的虚拟信息综合可视化研究

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系统仿真学报 2010年第3期22卷 642-646页

作者：周生胡晓峰罗批王琦珍国防大学信息作战与指挥训练教研部解放军炮兵学院中国人民解放军61135部队

战略对抗演习系统是面向高层的战略决策训练系统,其中包含了许多的模型和大量的信息。分析了战略对抗演习系统中信息可视化的需求和现有系统的优势和不足,提出用虚拟新闻对各种信息进行综合可视化表现的方法,研究了将多种不同类型的信... 详细信息

战略对抗演习系统是面向高层的战略决策训练系统,其中包含了许多的模型和大量的信息。分析了战略对抗演习系统中信息可视化的需求和现有系统的优势和不足,提出用虚拟新闻对各种信息进行综合可视化表现的方法,研究了将多种不同类型的信息进行可视化处理过程中信息的获取、存储、表现等技术途径。结果表明,各种信息综合到虚拟新闻中后,使得虚拟新闻更像真实世界中的电视新闻,为参演人员营造的虚拟信息环境更加逼真。最后给出了下一步的工作展望。

关键词：战略对抗演习虚拟新闻信息可视化叙事性技术

Power Optimization Strategy Considering Electric Vehicle in Home Energy Management System

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Journal of Electronic Science and Technology 2016年第3期14卷 234-241页

作者： Yu-xiao Huang feng Yang Yang luo Cheng-Long Xia the School of Energy Science and Engineering University of Electronic Science and TechnologyChengdu 611731China the School of Automation Engineering University of Electronic Science and TechnologyChengdu 611731China

With the development of smart grid, residents have the opportunity to schedule their household appliances （HA） for the purpose of reducing electricity expenses and alleviating the pressure of the smart grid. In this paper, we introduce the structure of home energy management system （EMS） and then propose a power optimization strategy based on household load model and electric vehicle （EV） model for home power usage. In this strategy, the electric vehicles are charged when the price is low, and otherwise, are discharged. By adopting this combined system model under the time-of-use electricity price （TOUP）, the proposed scheduling strategy would effectively minimize the electricity cost and reduce the pressure of the smart grid at the same time. Finally, simulation experiments are carried out to show the feasibility of the proposed strategy. The results show that crossover genetic particle swarm optimization algorithm has better convergence properties than traditional particle swarm algorithm and better adaptability than genetic algorithm.

关键词： EMS smart grid scheduling space state of charge time-of-use electricity price vehicle-to-grid technology (V2G) technology.

Corrosion behavior of low alloy steel for cargo oil tank under upper deck conditions

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Journal of Iron and Steel Research International 2018年第1期25卷 120-130页

作者： Hao Li feng Chai Cai-fu Yang Chao Li xiao-bing luo Central Iron and Steel Research Institute Beijing 100081China Qingdao NCS Testing Protection Technology Co. Ltd.Qingdao 266071 Shandong China

A simulated corrosion test apparatus was used to investigate the corrosion behavior of a low alloy steel under simulated upper deck conditions in a cargo oil tank. The estimated corrosion loss of conventional E36 class ship plate steel is 4.27 mm, which is clearly inadequate compared with the standard adopted by International Maritime Organization. Outer rust layer of specimens starts to peel off after 77 days and becomes fragmented after 98 days. X-ray diffraction, scanning electron micros- copy, and Raman spectroscopy revealed that the resulting rust is composed of σ-FeOOH （the main protective phase）, Fe2O3, FeS, elemental S, and FeSO4. FeSO4 in the interface of the base and rust layer leads to localized corrosion. Elemental sulfur forms on the surface of σ-FeOOH, and the quantity and size thereof increase with increasing corrosion time. Furthermore, layered elemental sulfur promotes fracture and peels off the rust layer.

关键词： Low alloy steel Cargo oil tank Upper deck Corrosion film Elemental sulfur

Strengthening and toughening mechanism of a Cu-bearing high-strength low-alloy steel with refined tempered martensite/bainite(M/B)matrix and minor inter-critical ferrite

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Journal of Iron and Steel Research International 2021年第4期28卷 464-478页

作者： Fei Zhu feng Chai xiao-bing luo Zheng-yan Zhang Cai-fu Yang Department of Structural Steels Central Iron and Steel Research InstituteBeijing 100081China

The microstructure–mechanical property relationship of a Cu-bearing low-carbon high-strength low-alloy steel,subjected to a novel multistage heat treatment including quenching(Q),lamellarization(L)and tempering(T),is *** strength of 989.5 MPa and average toughness at-80℃of 41 J were obtained in this steel after quenching and tempering(QT)heat *** QLT gained a little lower yield strength(982.5 MPa),but greatly enhanced average toughness at-80℃(137 J).To further clarify the strengthening and toughening mechanisms in specimen QLT,parameters of microstructural characteristic and crack propagation process were compared and analyzed for specimens Q,QL,QT and *** microstructure of tempered martensite/bainite(M/B)in specimen QT changed to refined tempered M/B matrix mixed with minor IF(inter-critical ferrite)in specimen ***-rich precipitates existed in tempered M/B for both specimens QT and QLT,as well as in *** with QT,adding a lamellarization step before tempering made the effective grains of specimen QLT refined and also led to coarser Cu-rich precipitates in tempered M/B *** weaker strengthening effect of coarser Cu-rich precipitates should be a key reason for the slightly lower yield strength in specimen QLT than in specimen *** austenite was found in all specimens Q,QL,QT and *** QLT showed purely ductile fracture mode at-80℃due to the refined effective *** greatly improved toughness is mainly attributed to the enhanced energy of crack *** combination of refined microstructure,softened matrix and deformation of minor'soft'IF during crack propagation led to the most superior toughness of specimen QLT among all specimens.

关键词： High-strength low-alloy steel Multistage heat treatment Low-temperature toughness Strengthening mechanism Grain refinement Crack propagation

Interfacial Zn2+-solvation regulator towards reversible and stable Zn anode

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Journal of Energy Chemistry 2025年第1期100卷 684-692页

作者： Miao Zhou Xiongbin luo Hang Li Shan Guo Zhuang Tong xiaotao Zhou Xu Li Zhaohui Hou Shuquan Liang Guozhao Fang College of Mechanical Engineering Key Laboratory of Hunan Province for Advanced Carbon-based Functional Materials Hunan Institute of Science and Technology School of Materials Science and Engineering Key Laboratory of Electronic Packaging and Advanced Functional Materials of Hunan Province Central South University College of Materials and Metallurgy Guizhou University National Energy Metal Resources and New Materials Key Laboratory Central South University

Aqueous zinc-ion batteries （AZIBs） are fundamentally challenged by the instability of the electrode/electrolyte interface,predominantly due to irreversible zinc （Zn） deposition and hydrogen ***,the intricate mechanisms behind the electrochemical discrepancies induced by interfacial Zn2+-solvation and deposition behavior demand comprehensive *** molecules endowed with special functional groups （such as hydroxyl,carboxyl,etc.） have the potential to significantly optimize the solvation structure of Zn2+and regulate the interfacial electric double layer （EDL）.By increasing nucleation overpotential and decreasing interfacial free energy,these functional groups facilitate a lower critical nucleation radius,thereby forming an asymptotic nucleation model to promote uniform Zn ***,this study presents a pioneering approach by introducing trace amounts of n-butanol as solvation regulators to engineer the homogenized Zn （H-Zn） anode with a uniform and dense *** interfacial reaction and structure evolution are explored by in/ex-situ experimental techniques,indicating that the H-Zn anode exhibits dendrite-free growth,no by-products,and weak hydrogen evolution,in sharp contrast to the bare ***,the H-Zn anode achieves a remarkable Zn utilization rate of approximately 20% and simultaneously sustains a prolonged cycle life exceeding 500 ***,the H-Zn//NH4V4O10（NVO） full battery showcases exceptional cycle stability,retaining 95.04%capacity retention after 400 cycles at a large current density of 5 A *** study enlightens solvation-regulated additives to develop Zn anode with superior utilization efficiency and extended operational lifespan.

关键词： Aqueous zinc-ion batteries Interfacial reaction Asymptotic nucleation model Reversible and stable Zn anode