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Rare Metals 2021年第11期40卷 3222-3234页

作者： Hao Luo Xiao-Qiang Li cun-liang pan Peng-Jiang He Ke-Li Zeng National Engineering Research Center of Near-Net-Shape Forming for Metallic Materials South China University of TechnologyGuangzhou 510640China Institute of Materials and Processing Guangdong Academy of SciencesGuangzhou 510650China Dongguan Hyperpowder Co.Ltd. Dongguan 523808China

In this study,Alloy 718 specimens were fabricated via selective laser melting(SLM),and the effects of different post-treatments on microstructures and mechanical properties of the alloy were systematically *** post-treatment techniques investigated were solid solution+dual aging(SA) and hot isostatic pressing+solid solution+dual aging treatment(HIP+SA).The results indicate that the specimens treated using SA have a columnar crystal structure similar to the as-built sample,the microstructure is partially recrystallized,and the grain size increases ***,the grain morphology is dominated by equiaxed crystals in samples treated using HIP+SA,and the microstructure is completely recrystallized,with distinct grain coarsening and a large number of twins *** treated using SA and HIP+SA show high tensile strength and yield strength and excellent elongation at room temperature,which can be primarily attributed to the strengthening of the γ’ and γ "precipitated *** number of γ" precipitated phases are reduced due to the consumption of Nb to form a large amounts of δ phase and(Ti,Nb)C carbides,resulting in the strength of HIP+SA specimens being lower than that of SA specimens.

关键词： Selective laser melting Alloy 718 Post-treatments Microstructural evolution Mechanical properties

Microstructure and mechanical properties of TiAl/Ni-based superalloy joints vacuum brazed with Ti-Zr-Fe-Cu-Ni-Co-Mo filler metal

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Rare Metals 2021年第8期40卷 2134-2142页

作者： Bao Wan Xiao-Qiang Li cun-liang pan Dong-Yu Li Sheng-Guan Qu Chao Yang National Engineering Research Center of Near-Net-Shape Forming for Metallic Materials South China University of TechnologyGuangzhou510640China

For the purpose of elevated temperature service and weight reduction in aerospace vehicle applications,a novel Ti-Zr-Fe-Cu-Ni-Co-Mo filler metal was employed to join TiAl to Ni-based superalloy(GH536).The effects of brazing temperature on interfacial microstructure and chemical composition of the joints were *** representative joint microstructure from TiAl substrate to GH536 substrate was primarily composed of four characteristic layers in order:B_(2);Al_(3)NiTi_(2);AlNi_(2)Ti containing Cr-rich(Cr,Ni,Fe)_(ss)(subscript ss represents solid solution),Ni-rich(Ni,Cr,Fe)_(ss) and TiNi3;Cr-rich(Cr,Ni,Fe)_(ss)containing AlNi_(2)Ti,Ni-rich(Ni,Cr,Fe)_(ss) and *** IV has the majority of the brazing seam,while LayerⅡwas the *** the thickness of LayerⅡwas not affected by brazing *** the increase in brazing temperature in the range of 1110-1170℃,both the shear strength and the thickness of brazing seam firstly increased and then *** joint performance was jointly controlled by the thickness of brazing seam,the amounts of microcracks and intermetallic compounds formed in brazing *** maximum shear strength of 183 MPa at room temperature was obtained together with a peak thickness when the joint was brazed at 1150℃for 10 min and the shear fracture mainly occurred in the thinnest LayerⅡAl_(3)NiTi_(2).

关键词： TiAl alloy Ni-based superalloy Brazing Microstructure Shear strength

The role of axon guidance molecules in the pathogenesis of epilepsy

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Neural Regeneration Research 2025年第5期20卷 1244-1257页

作者： Zheng Liu Chunhua pan Hao Huang Department of Neurology Affiliated Hospital of Zunyi Medical UniversityZunyiGuizhou ProvinceChina

Current treatments for epilepsy can only manage the symptoms of the condition but cannot alter the initial onset or halt the progression of the disease. Consequently, it is crucial to identify drugs that can target novel cellular and molecular mechanisms and mechanisms of action. Increasing evidence suggests that axon guidance molecules play a role in the structural and functional modifications of neural networks and that the dysregulation of these molecules is associated with epilepsy susceptibility. In this review, we discuss the essential role of axon guidance molecules in neuronal activity in patients with epilepsy as well as the impact of these molecules on synaptic plasticity and brain tissue remodeling. Furthermore, we examine the relationship between axon guidance molecules and neuroinflammation, as well as the structural changes in specific brain regions that contribute to the development of epilepsy. Ample evidence indicates that axon guidance molecules, including semaphorins and ephrins, play a fundamental role in guiding axon growth and the establishment of synaptic connections. Deviations in their expression or function can disrupt neuronal connections, ultimately leading to epileptic seizures. The remodeling of neural networks is a significant characteristic of epilepsy, with axon guidance molecules playing a role in the dynamic reorganization of neural circuits. This, in turn, affects synapse formation and elimination. Dysregulation of these molecules can upset the delicate balance between excitation and inhibition within a neural network, thereby increasing the risk of overexcitation and the development of epilepsy. Inflammatory signals can regulate the expression and function of axon guidance molecules, thus influencing axonal growth, axon orientation, and synaptic plasticity. The dysregulation of neuroinflammation can intensify neuronal dysfunction and contribute to the occurrence of epilepsy. This review delves into the mechanisms associated with

关键词： axon guidance drug-resistant epilepsy epilepsy nerve regeneration nervous system diseases neural pathways neuroinflammatory diseases neuronal plasticity neurons synaptic remodeling

Interpretation of the DAMPE 1.4 Te V peak according to the decaying dark matter model

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Science China(Physics,Mechanics & Astronomy) 2018年第10期61卷 36-42页

作者： Xu pan cun Zhang Lei Feng Key Laboratory of Dark Matter and Space Astronomy Purple Mountain Observatory Chinese Academy of Sciences School of Physics Nanjing University

Highly accurate measurements of cosmic ray electron flux by the dark matter particle explorer （DAMPE） ranging between 25 GeV and 4.6 TeV have recently been published. A sharp peak structure was found at - 1.4 TeV. This unexpected peak structure can be reproduced by the annihilation/decay of a nearby dark matter （DM） halo. In this study, we adopt the decaying-DM model to interpret the - 1.4 TeV peak. We found that the decay products of the local DM subhalo could contribute to the DMAPE peak with mDM = 3 TeV and r - 10^28 s. We also obtain constraints on DM lifetime and the distance of the local DM subhalo by comparison with DAMPE data.

关键词： dark matter cosmic ray DAMPE

Sky location of massive black hole binaries in the foreground of Galactic white dwarf binaries

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 97-108页

作者： pan Guo Hong-Bo Jin Cong-Feng Qiao Yue-liang Wu The International Centre for Theoretical Physics Asia-Pacific University of Chinese Academy of Sciences The School of Physical Sciences University of Chinese Academy of Sciences Institute for Frontiers in Astronomy and Astrophysics Beijing Normal University National Astronomical Observatories Chinese Academy of Sciences Institute of Theoretical Physics Chinese Academy of Sciences

For space-based gravitational wave （GW） detection,the main noise source for massive black hole binaries （MBHBs） is attributed to approximately 10～7double white dwarf binaries in the *** a GW source,the amplitude of the detector response,recorded by a space-based gravitational wave detector,exhibits a modulation effect with a year period when observing the source from various orbital *** the adverse conditions mentioned above,where there is a strong foreground noise and annual modulation in the signals,we employed the wavelet transform and the strong-amplitude relevant orbital position search methods,which allows the weak MBHB sources to achieve higher locating *** detail,for two MBHB sources of lower intensity,the precision of luminosity distance,represented by the ratio ?DL/DLat the 95%confidence level,is enhanced by factors of ～*** angular resolutions,denoted by??s,are enhanced by a factor of ～*** improvements increase the number of detectable GW sources,facilitate multi-messenger follow-up observations and provide constraints on the cosmological constant.

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Defect Engineering:Can it Mitigate Strong Coulomb Effect of Mg^(2+)in Cathode Materials for Rechargeable Magnesium Batteries?

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Nano-Micro Letters 2025年第1期17卷 135-159页

作者： Zhengqing Fan Ruimin Li Xin Zhang Wanyu Zhao Zhenghui pan Xiaowei Yang School of Chemistry and Chemical Engineering Shanghai Jiao Tong UniversityShanghai 200240People’s Republic of China School of Chemistry and Chemical Engineering Taiyuan University of TechnologyTaiyuan 030024People’s Republic of China School of Materials Science and Engineering Tongji UniversityShanghai 201804People’s Republic of China

Rechargeable magnesium batteries(RMBs)have been considered a promising“post lithium-ion battery”system to meet the rapidly increasing demand of the emerging electric vehicle and grid energy storage ***,the sluggish diffusion kinetics of bivalent Mg^(2+)in the host material,related to the strong Coulomb effect between Mg^(2+)and host anion lattices,hinders their further development toward practical *** engineering,regarded as an effective strategy to break through the slow migration puzzle,has been validated in various cathode materials for *** this review,we first thoroughly understand the intrinsic mechanism of Mg^(2+)diffusion in cathode materials,from which the key factors affecting ion diffusion are further ***,the positive effects of purposely introduced defects,including vacancy and doping,and the corresponding strategies for introducing various defects are *** applications of defect engineering in cathode materials for RMBs with advanced electrochemical properties are also ***,the existing challenges and future perspectives of defect engineering in cathode materials for the overall high-performance RMBs are described.

关键词： Rechargeable magnesium battery Sluggish diffusion kinetic Defect engineering Cathode materials Ion migration

Systematic comparison of Kawasaki disease Z-score formulas:Enhancing diagnostic accuracy and clinical applicability across populations

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World Journal of Clinical Pediatrics 2025年第1期14卷 63-68页

作者： Yan pan Fu-Yong Jiao Department of Pediatrics The First Affiliated Hospital of Yangtze UniversityJingzhou 434000Hubei ProvinceChina Shaanxi Kawasaki Disease Diagnosis and Treatment Center Children's HospitalShaanxi Provincial People's Hospital of Xi'anJiaotong UniveristyXi'an 710000Shaanxi ProvinceChina

This study aims to evaluate the performance of six distinct Z-score formulas in diagnosing coronary artery dilation in Kawasaki disease(KD)patients,with a focus on their clinical applicability across diverse populations.A retrospective analysis was conducted using comparative statistical methods to assess the sensitivity and specificity of each *** Kobayashi and Dallaire formulas demonstrated the highest sensitivity in China,particularly in younger patients with prolonged fever *** findings provide evidence-based recommend-ations for selecting Z-score formulas to optimize diagnostic precision in KD patients.

关键词： Kawasaki disease Early diagnosis Z-score Children

Tidal Bore Dynamics Around the Similar Right-Angle Shoreline in the Qiantang Estuary,China

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China Ocean Engineering 2022年第5期36卷 827-838页

作者： WANG Qiu-shun pan cun-hong CHEN Fu-yuan Zhejiang Institute of Hydraulics and Estuary Hangzhou 310020China Zhejiang Provincial Key Laboratory of Estuary and Coast Hangzhou 310020China

Tidal bores are a unique hydrodynamic phenomenon during flood tide in the Qiantang *** tidal bore propagation around the similar right-angle shoreline is rarely documented in tidal *** investigate tidal bores around this shoreline,a hydrodynamic model combined with a theoretical method is employed to reveal the characteristics of the bore *** theoretical solution of the tidal bore intensity is deduced to illustrate the relationship of the incident tidal bores and the back-flow bores during the *** hydrodynamic model based on shallow water equation is employed to perform the simulation of tidal bores in the *** results with respect to the bore height and the propagation speed of tidal bores have a favourable agreement with field *** tidal bore dynamics in the neighborhood of the similar right-angle shoreline are *** characteristics of tidal bores in terms of water surface,velocity,bore steepness and the intensity are illustrated and the back-flow bore is analyzed by numerical and theoretical methods around the similar right-angle *** height of the back-flow bore relative to the incident tidal bore ranges from 1.05 to *** result reveals that the ambient water depth and the shape of the similar right-angle shoreline are contributed to the back-flow bore formation.

关键词： back-flow bore numerical model shallow water equation Qiantang Estuary tidal bores

NUMERICAL SIMULATION FOR 2D SHALLOW WATER EQUATIONS BY USING GODUNOV-TYPE SCHEME WITH UNSTRUCTURED MESH

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Journal of Hydrodynamics 2006年第4期18卷 475-480页

作者： pan cun-hong DAI Shi-qiang CHEN Sen-mei Shanghai Institute of Applied Mathematics and Mechanics Shanghai University Shanghai 200436 China Zhejiang Institute of Hydraulics and Estuary Hangzhou 310020 China Shanghai Institute of Applied Mathematics and Mechanics Shanghai University. Shanghai 200436 China Zhejiang Institute of Hydraulics and Estuary Hangzhou 310020. China

In order to establish a well-balanced scheme, 2D shallow water equations were transformed and solved by using the Finite Volume Method （FVM） with unstructured mesh. The numerical flux from the interface between cells was computed with an exact Riemann solver, and the improved dry Riemann solver was applied to deal with the wet/dry problems. The model was verified through computing some typical examples and the tidal bore on the Qiantang River. The results show that the scheme is robust and accurate, and could be applied extensively to engineering problems.

关键词： 2D shallow water equations Finite Volume Method (FVM) unstructured mesh Godunov-type scheme Riemann solver

NUMERICAL PREDICTION OF SUBMARINE HYDRODYNAMIC COEFFI-CIENTS USING CFD SIMULATION

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Journal of Hydrodynamics 2012年第6期24卷 840-847页

作者： pan Yu-cun ZHANG Huai-xin ZHOU Qi-dou State Key Laboratory of Ocean Engineering Shanghai Jiao Tong University Department of Naval Architecture Naval University of Engineering

The submarine Hydrodynamic coefficients are predicted by numerical simulations. Steady and unsteady Reynolds Averaged Navier-Stokes （RANS） simulations are carried out to numerically simulate the oblique towing experiment and the Planar Motion Mechanism （PMM） experiment performed on the SUBOFF submarine model. The dynamic mesh method is adopted to simulate the maneuvering motions of pure heaving, pure swaying, pure pitching and pure yawing. The hydrodynamic forces and moments acting on the maneuvering submarine are obtained. Consequently, by analyzing these results, the hydrodynamic coefficients of the submarine maneuvering motions can be determined. The computational results are verified by comparison with experimental data, which show that this method can be used to estimate the hydrodynamic derivatives of a fully appended submarine.

关键词： submarine maneuverability hydrodynamic coefficients Planar Motion Mechanism (PMM) dynamic mesh