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Journal of Rare Earths 2025年第2期43卷 304-311页

作者： Fugang Chen Suxin Lu Jie Wang Yong Zhao Wenqiang Zhao Zhi xu School of Materials Science and Engineering Jiangsu University of Science and Technology Baotou Tianshi Rare Earth New Materials Co. Ltd. Jiangsu Yangzi Xinfu Shipbuilding Co. Ltd.

A sintered Nd-Y-Fe-B magnet was designed and manufactured by the multi-main-phase *** distributed Y in the magnet decreases the adverse magnetic weakening effect of Y on the *** boundary diffusion process（GBDP） was conducted to further enhance the coercivity of the Nd-Y-Fe-B *** coercivity increases significantly from 884 to 1741 ka.m after GBDP with *** mechanism of the coercivity enhancement is discussed based on the microstructure *** simulation reveals that when the diffused Tb-rich shell thickness is lower than 12 nm the c-plane shell（perpendicular to the c-axis） is much more effective in enhancing the coercivity than the side plane shell（parallel to the c-axis）.But when the Tb-rich shell thickness is above12 nm the side plane shell contributes more to the coercivity *** results in this work can help to design and manufacture Nd-Fe-B magnets with low cost and high magnetic properties.

关键词： Grain boundary diffusion Micromagnetic simulation Multi-main-phase process Nd-Fe-B magnets Rare earths

Seismic attenuation relationship with homogeneous and heterogeneous prediction-error variance models

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Earthquake Engineering and Engineering Vibration 2014年第1期13卷 1-11页

作者： He-Qing Mu Rong-Rong xu ka.Veng Yuen Faculty of Science and Technology University of Macao

Peak ground acceleration(PGA) estimation is an important task in earthquake engineering *** of the most well-known models is the Boore-Joyner-Fumal formula,which estimates the PGA using the moment magnitude,the site-to-fault distance and the site foundation *** the present study,the complexity for this formula and the homogeneity assumption for the prediction-error variance are investigated and an effi ciency-robustness balanced formula is *** this purpose,a reduced-order Monte Carlo simulation algorithm for Bayesian model class selection is presented to obtain the most suitable predictive formula and prediction-error model for the seismic attenuation *** this approach,each model class(a predictive formula with a prediction-error model) is evaluated according to its plausibility given the *** one with the highest plausibility is robust since it possesses the optimal balance between the data fi tting capability and the sensitivity to noise.A database of strong ground motion records in the Tangshan region of China is obtained from the China Earthquake Data Center for the *** optimal predictive formula is proposed based on this *** is shown that the proposed formula with heterogeneous prediction-error variance is much simpler than the attenuation model suggested by Boore,Joyner and Fumal(1993).

关键词： Bayesian inference Boore-Joyner-Fumal formula heterogeneity variance input-dependent variance model class selection peak ground acceleration seismic attenuation

Monolithic full-color active-matrix micro-LED microdisplay using InGaN/AlGaInP heterogeneous integration

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Light(Science & Applications) 2023年第11期12卷 2459-2467页

作者： Longheng Qi Peian Li xu Zhang ka.Ming Wong Kei May Lau Department of Electronic and Computer Engineering The Hong Kong University of Science and TechnologyClear Water BayKowloonHong KongChina

A prototype of full-color active-matrix micro-light-emitting diode(micro-LED)micro-display with a pixel density of 391 pixel per inch(ppi)using InGaN/AlGaInP heterogeneous integration is *** blue/green dual-color micro-LED arrays realized on a single metal organic chemical vapor deposition(MOCVD)-grown GaN-on-Si epiwafer and AlGaInP red micro-LED arrays are both monolithically fabricated,followed by the integration with a common complementary metal oxide semiconductor(CMOS)backplane via flip-chip bonding technology to form a doublelayer thin-film display ***-color images with decent color gamut and brightness are successfully displayed through the fine adjustment of driving current densities of RGB *** full-color display combines the advantages of high quantum efficiency of InGaN material on blue/green light and AlGaInP material on red light through heterogeneous integration and high pixel density through monolithic fabrication approach,demonstrating the feasibility and prospects of high brightness,good color performance,and high-resolution micro-LED microdisplays in future metaverse applications.

关键词： AlGaInP integration matrix

Visual inference of flow flux via free surface PDE model and image sequence assimilation

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IET Cyber-Systems and Robotics 2019年第1期1卷 20-27页

作者： Shan Guo Chao xu ka.Fai Cedric Yiu School of Mathematical Sciences Zhejiang UniversityHangzhouPeople's Republic of China Department of Applied Mathematics Hong Kong Polytechnic UniversityHong KongPeople's Republic of China Institute of Cyber-Systems and Control Zhejiang UniversityHangzhouPeople's Republic of China

The free-surface flows,such as flows in rivers,lakes,and tides,play an important role in hydraulic engineering and environmental ***,due to their complex and changeable characters,the precise evolution procedure is quite difficult to *** this study,the authors propose a novel framework to reconstruct the free-surface flow modelled by the shallow water equations by assimilating the images *** particular,the ensemble ka.man filter framework is employed to implement the assimilation *** efficiency of the proposed strategy has been verified through numerical simulations in which the accurate flow field in different situations could be obtained within limited assimilation steps.

关键词： process. flow steps

Oxidative stress mediates glycidol-induced endothelial injury and its protection by 6-C-(E-2-fluorostyryl)naringenin

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Food Science and Human Wellness 2024年第5期13卷 2584-2594页

作者： Yue Zhou Hui xu ka.Wing Cheng Feng Chen Qian Zhou Mingfu Wang College of Civil and Transportation Engineering/College of Chemistry and Environmental Engineering Shenzhen UniversityShenzhen 518060China

Glycidol is a common lipid-derived foodborne toxicant mainly presents in refined oils and related *** endothelial cells may be potential targets of the deleterious effects associated with glycidol *** human umbilical vein endothelial cells(HUVECs),we found that glycidol treatment promoted endothelialto-mesenchymal transition(EndMT)at a lower concentration(0.5 mmol/L),while induced apoptosis and inflammation at a higher concentration(1 mmol/L).These harmful effects were achieved by the activation of NF-κB/MAPK signaling pathway and were mediated by reactive oxygen species(ROS).In addition,the protective potential of 6-C-(E-2-fluorostyryl)naringenin(6-CEFN)against glycidol was evaluated and compared with *** pre-treated with 6-CEFN,but not naringenin,displayed resistance to endothelial dysfunction caused by glycidol.

关键词： Glycidol Endothelial cells 6-C-(E-2-fluorostyryl)naringenin Oxidative stress Endothelial-to-mesenchymal transition

Effect of orbital symmetry on atomic ionization in near-infrared laser fields

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Chinese Physics B 2025年第1期34卷 289-292页

作者： Manqi xu Shilin Hu Li Guo Jing Chen Research Center for Advanced Optics and Photoelectronics Department of PhysicsCollege of ScienceShantou UniversityShantou 515063China Key Laboratory of Intelligent Manufacturing Technology of MOE Shantou UniversityShantou 515063China Department of Physics Shanghai Normal UniversityShanghai 200234China Hefei National Research Center for Physical Sciences at the Microscale and School of Physical Sciences Department of Modern PhysicsUniversity of Science and Technology of ChinaHefei 230026China Shenzhen Key Laboratory of Ultraintense Laser and Advanced Material Technology Center for Advanced Material Diagnostic Technologyand College of Engineering PhysicsShenzhen Technology UniversityShenzhen 518118China

We have performed a comparative study of the photoelectron spectra adopting different initial states(2s or 2_(p0))of hydrogen atoms in a near-infrared laser pulse by using the full three-dimensional time-dependent Schr?dinger *** is demonstrated that the atomic photoelectron spectra oscillate out of step as a function of electron kinetic energies for different initial states(2s or 2_(p0)),which is well reproduced by the simulations based on strong field approximation,and the above distinct feature is ascribed to the different interferences from the partial electron wave packets detached by positive and negative electric fields for different initial states of 2s and 2_(p0).

关键词： orbital symmetry photoelectron spectra strong-field approximation

Recent progress of self-supported air electrodes for flexible Zn-air batteries

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Journal of Energy Chemistry 2024年第2期89卷 110-136,I0004页

作者： Chen xu Yanli Niu Vonika.ka.Man Au Shuaiqi Gong xuan Liu Jianying Wang Deli Wu Zuofeng Chen School of Chemical Science and Engineering Tongji UniversityShanghai 200092China College of Environmental Science&Engineering Tongji UniversityShanghai 200092China Department of Science and Environmental Studies The Education University of Hong KongHong KongChina

Smart wearable devices are regarded to be the next prevailing technology product after smartphones and smart homes,and thus there has recently been rapid development in flexible electronic energy storage *** them,flexible solid-state zinc-air batteries have received widespread attention because of their high energy density,good safety,and *** bifunctional oxygen electrocatalysts are the primary consideration in the development of flexible solid-state zinc-air batteries,and self-supported air cathodes are strong candidates because of their advantages including simplified fabrication process,reduced interfacial resistance,accelerated electron transfer,and good *** review outlines the research progress in the design and construction of nanoarray bifunctional oxygen *** from the configuration and basic principles of zinc-air batteries and the strategies for the design of bifunctional oxygen electrocatalysts,a detailed discussion of self-supported air cathodes on carbon and metal substrates and their uses in flexible zinc-air batteries will ***,the challenges and opportunities in the development of flexible zinc-air batteries will be discussed.

关键词： Bifunctional electrocatalysts Oxygen reduction reaction Oxygen evolution reaction Self-supported air electrodes Flexible zinc-air batteries

The development of roadside green swales in the Chinese Sponge City Program:Challenges and opportunities

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Frontiers of Engineering Management 2023年第4期10卷 566-581页

作者： Lingwen Lu Faith ka.Shun Chan Matthew Johnson Fangfang Zhu Yaoyang xu Key Laboratory of Urban Environment and Health Ningbo Observation and Research StationInstitute of Urban EnvironmentChinese Academy of Sciences(CAS)Xiamen361021China School of Geographical Sciences Faculty of Science and EngineeringUniversity of Nottingham Ningbo ChinaNingbo315100China CAS Haixi Industrial Technology Innovation Center in Beilun Zhejiang Key Laboratory of Urban Environmental Processes and Pollution ControlNingbo315830China Water@Leeds Research Institute University of LeedsLeeds LS29JTUK School of Geography University of NottinghamNottinghamshireNG72RDUK Department of Civil Engineering Faculty of Science and EngineeringUniversity of Nottingham Ningbo ChinaNingbo 315100China Zhejiang Key Laboratory of Urban Environmental Processes and Pollution Control CAS Haixi Industrial Technology Innovation Center in BeilunNingbo 315830China

Roadside green swales have emerged as popular stormwater management infrastructure in urban areas,serving to mitigate stormwater pollution and reduce urban surface water ***,there is a limited understanding of the various types,structures,and functions of swales,as well as the potential challenges they may face in the *** recent years,China has witnessed a surge in the adoption of roadside green swales,especially as part of the prestigious Sponge City Program(SCP).These green swales play a crucial role in controlling stormwater pollution and conserving urban water resources by effectively removing runoff pollutants,including suspended solids,nitrogen,and *** review critically examines recent research findings,identifies key knowledge gaps,and presents future recommendations for designing green swales for effective stormwater management,with a particular emphasis on ongoing major Chinese infrastructure *** the growing global interest in bioswales and their significance in urban development,China's current classification of such features lacks a clear definition or specific consideration of ***,policymakers have often underestimated the adverse environmental effects of road networks,as reflected in existing laws and planning *** review argues that the construction and maintenance of roadside green swales should be primarily based on three critical factors:Wellthought-out road planning,suitable construction conditions,and sustainable long-term *** integration of quantitative environmental standards into road planning is essential to effectively address the challenge of pollution from rainfall *** combat pollution associated with roads,a comprehensive assessment of potential pollution loadings should be carried out,guiding the appropriate design and construction of green swales,with a particular focus on addressing the phenomenon of first *** of the major challenges faced in su

关键词： grass swale infiltration swale bioswale wet swale spongecity

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Correlation of effective hepatic blood flow with liver pathology in patients with hepatitis B virus

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Liver Research 2021年第4期5卷 243-250页

作者： Xin Shu Haixia Sun Xiaoan Yang Yifan Jia Peiyan xu Hong Cao ka.Zhang Department of Infectious Diseases The Third Affiliated Hospital of Sun Yat-sen UniversityGuangzhouChina Department of Infectious Diseases Huadu District People's Hospital of GuangzhouGuangzhouChina

Background and aims:Effective hepatic blood flow(EHBF)decreases with liver disease progression,and identifying liver pathology is critical for patients with liver *** study was designed to elucidate the correlation between EHBF and liver pathology and explore the potential of EHBF for predicting the degree of liver ***:In this study,207 patients with hepatitis B virus(HBV)who underwent liver biopsy and indocyanine green(ICG)clearance tests were *** was measured using the ICG clearance test,and liver tissue was histologically analyzed to determine the pathological stage according to the Scheuer scoring *** data,biochemical indexes,and FibroScan data were collected for statistical ***:EHBF levels decreased as the liver histological stages of inflammation and fibrosis increased(Pka.ine phosphatase,aspartate aminotransferase-to-platelet ratio index,fibrosis index based on the four factors,and liver stiffness measurement(P<0.05).The EHBF levels of patients without liver inflammation(G0)were significantly higher than those of patients with liver inflammation(G1e4)(P<0.001).The area under the receiver operating characteristic curve(AUROC)value for discriminating patients without liver inflammation was 0.827,and the optimal cutoff value was 0.936 L/*** EHBF levels of patients with severe liver inflammation(G4)were significantly lower than those of patients with G0e3 liver inflammation(P<0.001).The AUROC value for discriminating patients with severe liver inflammation was 0.792,and the optimal cutoff value was 0.552 L/*** EHBF levels of patients without liver fibrosis(S0)were significantly higher than those of patients with liver fibrosis(S1e4)(P<0.001).The AUROC value for discriminating patients without liver fibrosis was 0.633,and the optimal cutoff val

关键词： Hepatitis B virus(HBV) Liver inflammation Liver fibrosis Effective hepatic blood flow(EHBF) Liver disease

Performance of a small AT-TPC prototype

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Nuclear Science and Techniques 2018年第7期29卷 138-144页

作者： Jin-Yan xu Qi-Te Li Yan-Lin Ye Jian Gao Jia-Xing Han Shi-Wei Bai ka.Hou Ng School of Physics and State Key Laboratory of Nuclear Physics and Technology Peking University

A small prototype of an active-target time projection chamber detector based on the gas electron multiplier(GEM) readout technique was designed and *** calculations were performed to analyze the electric field distribution and optimize the *** particular,a guard ring installed above the GEM foil may play an important role in shaping the electric field in the gas vessel and improving the overall performance of the *** best results were obtained at a guard-ring voltage of-950 *** using a collimated a-particle source,an energy resolution of 3.6–4.0 ke V can be achieved for deposited energies of 18–21 keV,respectively.A position resolution of less 0.2 mm was observed along the electron drift direction,whereas the resolution in the readout plane was approximately 0.45 mm.A time resolution of less than 20 ns was *** using helium as the primary working gas as well as the target material,a t a elastic scattering events can be clearly imaged.

关键词：原型性能优化设计模拟计算工作气体宝石时间电子