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Achievement and photoluminescence of ultra-small size of Ge quantum dots directly grown on Si（001） substrate

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Achievement and photoluminescence of ultra-small size of Ge ...

Rational modulation of fluorophosphate cathode by anionic groups to reduce the polarization behavior for fast-charging sodium-ion batteries

第18届国际真空大会

作者： k.f. wang* W.f. Zhang M.J. Huang and Y.L. Mao key Laboratory for Photovoltaic Materials Henan University kaifeng 475004 China

Sub-10-nm domelike Ge quantum dots （QDs） have been successfully grown directly on Si （001）（2×1） reconstruction surface for the first time. Their density and diameter are respectively 5.2×1011cm-2 and 7.6±2.3nm, which can be explained by a pit-mediated mass transferring mechanism. Their morphology of domelike is ascribed to a relatively high growth temperature of 450℃. Their optical property was studied by low temperature photoluminescence （PL） spectrum and showed a strong non-phonon （NP） peak with a big blue shift of 0.19eV.

关键词： Ge quantum dots Photoluminescence

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Journal of Energy Chemistry 2025年第1期100卷 509-521页

作者： Xinyuan wang fan Zhang Xingyu Zhou Qian wang Changyu Liu Yangyang Liu Hui wang Xiaojie Liu key Laboratory of Synthetic and Natural functional Molecule of the Ministry of Education College of Chemistry & Materials Science Northwest University

Na3V2（PO4）2O2f （VP） is recognized as a promising cathode material for sodium-ion batteries due to its stable structural framework and high specific *** functional theory （DfT） and finite element simulations show that incorporating SO42-into VP decreases its band gap,lowers the migration energy barrier,and ensures a uniform Na+concentration gradient and stress distribution during charge and discharge ***,the average Na+diffusion coefficient of Na3V2（PO4）1.95（SO4）0.05O2f（VPS-1） is roughly double that of VP,leading to enhanced rate capability (80 C,75.5 mAh g-1) and cycling stability (111.0 mAh g-1capacity after 1000 cycles at 10 C current density) for ***-1 exhibits outstanding fast-charging capabilities,achieving an 80%state of charge in just 8.1 *** assembled VPS-1//SbSn/NPC full cell demonstrated stable cycling over 200 cycles at a high 5 C current,maintaining an average coulombic efficiency of 95.35%.

关键词： Anionic group modulation Polarization behavior fast-charging Sodium-ion battery fluorophosphate Cathode

SUPERPLASTICITY AND DIffUSION BONDING Of IN718 SUPERALLOY

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Acta Metallurgica Sinica(English Letters) 2007年第4期20卷 307-312页

作者： W.B. Han k.f. Zhang B. wang D.Z. Wu School of Materials Science and Engineering Harbin Institute of Technology Harbin 150001 China

The superplasticity and diffusion bonding of IN718 superalloy were studied in this article. The strain rate sensitivity index m was obtained at different temperatures and various initial strain rates using the tensile speed mutation method; m reached its maximum value 0.53 at an initial strain rate of 1×10^-4s^-1 at 1253k. The diffusion bonding parameters, including the bonding temperature T, pressure p, and time t, affected the mechanism of joints. When the bonded specimen with 25μm thick nickel foil interlayer was tensile at room temperature, the shear fracture of the joints with nickel foil interlayer took place at the IN718 part. Microstructure study was carried out with the bonded samples. The microstructure shows an excellent bonding at the interfaces. The optimum parameters for the diffusion bonding are： T = 1273-1323k, p = 20-30MPa, t = 45-60min.

关键词： superplasticity diffusion bonding nickel foil IN718 alloy

NUMERICAL INVESTIGATION ON fLOW CHARACTERISTICS IN RIBBED BEND

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Journal of Hydrodynamics 2001年第2期13卷 111-120页

作者： Yao, J. fan, J.R. Zhang, X.Y. Cen, k.f. Dept. of Energy Engineering Zhejiang Univ. Hangzhou 310027 China

Previous research by the author has proved that ribbed bend technology is a simple and efficient anti-erosion method. The present paper is a further study to unveil the mechanism of the technology by using numerical method. The flow characteristics in ribbed bend were studied. A k-Ε turbulence model was used and the simulations were carried out in the body-fitted coordinates. This procedure was confirmed to be credible by showing the satisfactory agreement between the predications and experimental results. It is concluded that the character of the longitudinal flow in ribbed bend especially in the concave parts between ribs has a beneficial effect on increasing the anti-erosion ability of ribbed bend but the secondary flow has little effect on determining the particle trajectory.

关键词： Boundary conditions Differential equations Erosion Mathematical models Numerical methods Three dimensional

PROPERTIES Of THREE-DIMENSIONAL MOVEMENT Of SANDY WATER DISCHARGED INTO A LAkE

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Journal of Hydrodynamics 2001年第2期13卷 72-76页

作者： Deng, Y. Li, J. Li, k.f. Zhao, W.Q. State key Lab. of High Speed flow Sichuan Univ. Chengdu 610065 China

A Random Trajectory Model (RTM) for solid-liquid two-phase flow based on the Lagrangian Method is presented in this paper. The effects of water drag force, pressure gradient force, buoyancy and virtual mass force on the particles were included and the turbulent dispersion was modeled by random method. Three-dimensional k-Ε model was used to calculate the flow field. A pumped-storage power station, with a natural lake as its upper pool, was taken as a case for the study. Averaged movement trajectories, velocities and the volume-concentration distributions for 5 groups of sediment particles, were predicted with RTM. The possible silted locations in the lake were also predicted.

关键词： Boundary conditions Computer simulation Lakes Sand Three dimensional Two phase flow Velocity

EffECTS Of HIGH-DENSITY CURRENT PULSES ON WORk HARDENING BEHAVIORS Of AUSTENITE STAINLESS STEEL IN WIRE-DRAWING DEfORMATION

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Acta Metallurgica Sinica(English Letters) 2001年第5期14卷 341-346页

作者： k.f. Yao, P. Yu, J. wang, W. fang and M.X. Zheng Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China Dept. of Mech. Eng. Tsinghua Univ. Beijing 100084 China

The influence of high-density pulsing current on the work-hardening behaviour of H0Cr17Ni6Mn3 and 1Cr18Ni9 stainless steels in wire-drawing deformation processes has been studied. It was found that the drawing stress and the work-hardening rate of wires were significantly reduced by applying current pulses in drawing process. The work-hardening behavior of the multi-courses drawing deformation can be well described by Hollomon formula σ=κΕn. With the application of current pulses in drawing deformation, the work-hardening exponents of H0Cr17Ni6Mn3 steel wires and 1Cr18Ni9 stainless steel wires were reduced by 33% and 45%, respectively, and their work-hardening coefficients were reduced by 41% and 47%, respectively. It was also found that the work-hardening coefficient of wires was reduced with the increment of the frequency of current pulses, while the work-hardening exponents of both steels were insensitive to the pulsing frequency.

关键词： Deformation Electric currents Pulsatile flow Strain hardening Wire drawing

Protein arginine methyltransferase-6 regulates heterogeneous nuclear ribonucleoprotein-f expression and is a potential target for the treatment of neuropathic pain

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Neural Regeneration Research 2025年第9期20卷 2682-2696页

作者： Xiaoyu Zhang Yuqi Liu fangxia Xu Chengcheng Zhou kaimei Lu Bin fang Lijuan wang Lina Huang Zifeng Xu Department of Anesthesiology International Peace Maternity and Child Health HospitalSchool of MedicineShanghai Jiao Tong UniversityShanghaiChina Department of Anesthesiology Shanghai General HospitalSchool of MedicineShanghai Jiao Tong UniversityShanghaiChina Shanghai key Laboratory of Embryo Original Diseases ShanghaiChina

Protein arginine methyltransferase-6 participates in a range of biological functions,particularly RNA processing,transcription,chromatin remodeling,and endosomal ***,it remains unclear whether protein arginine methyl transferase-6 modifies neuropathic pain and,if so,what the mechanisms of this *** this study,protein arginine methyltransferase-6 expression levels and its effect on neuropathic pain were investigated in the spared nerve injury model,chronic constriction injury model and bone cancer pain model,using immunohistochemistry,western blotting,immunoprecipitation,and label-free proteomic *** results showed that protein arginine methyltransferase-6 mostly co-localized withβ-tubulinⅢin the dorsal root ganglion,and that its expression decreased following spared nerve injury,chronic constriction injury and bone cancer *** addition,PRMT6 knockout(Prmt6~(-/-))mice exhibited pain ***,the development of spared nerve injury-induced hypersensitivity to mechanical pain was attenuated by blocking the decrease in protein arginine methyltransferase-6 ***,when protein arginine methyltransferase-6 expression was downregulated in the dorsal root ganglion in mice without spared nerve injury,increased levels of phosphorylated extracellular signal-regulated kinases were observed in the ipsilateral dorsal horn,and the response to mechanical stimuli was ***,protein arginine methyltransferase-6 appeared to contribute to spared nerve injury-induced neuropathic pain by regulating the expression of heterogeneous nuclear ***,protein arginine methyltransfe rase-6-mediated modulation of hete rogeneous nuclear ribonucleoprotein-f expression required amino atids 319 to 388,but not classical H3R2 *** findings indicated that protein arginine methyltransferase-6 is a potential therapeutic target fo r the treatment of peripheral neuro pathic pain.

关键词： dorsal root ganglion heterogeneous nuclear ribonucleoprotein f neuropathic pain protein arginine methyltransferase-6 sensory neurons

A MODEL fOR BAINITIC TRANSfORMATION kINETICS WITH PARABOLIC NUCLEATION RATE

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Acta Metallurgica Sinica(English Letters) 2001年第1期14卷 63-71页

作者： C.C. Liu, k.f. Yao and Z Liu (Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China) Dept. of Mech. Eng. Tsinghua Univ. Beijing 100084 China

Based on the assumptions of parabolic variation of nucleation rate versus time and transformation kinetics depending mainly on nucleation rate, a different model for bainitic transformation kinetics in hypoeutectoid steels was established. And this model was proved to be effective in the description of bainitic transformation by comparison with the result of conventional Avrami equation.

关键词： bainitic transformation kinetics parabolic nucleation rate rapid growth

STUDY ON THE PROBLEMS Of CONTACT IN THE NUMERICAL SIMULATION Of SHEET fORMING

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Acta Metallurgica Sinica(English Letters) 2000年第2期13卷 459-464页

作者： k.f. Zhang, f.X. Diao, Q.f. Song, W. Wu, k.B. Chen and T.Xie Harbin Institute of Technology, Harbin 150001, China

This study is concerned with the problems of contact in the process of numerical simulation of sheet metal forming in rigid visco-plastic shell fEM. In respect of analysis of sheet deep drawing process,for the tool model described by triangular elements, a kind of contact judging algorithm about the correlation between the node of deformed mesh and the triangular element of a tool is presented. In SPf/DB Lagrangian multiplier method is adopted to solve the contact problem between deformed meshes, and a new reliable practical dynamic contact checking algorithm is presented. As computation examples, the simulation results of metal sheet deep drawing and SPf/DB are introduced in this paper.

关键词： kcontact search algorithm rigid visco-plastic shell fEM Lagrangian multiplier method sheet metal forming