A5023501723- Metallurgical Processes and Thermodynamics
- Solidification and crystal growth phenomena
- Aluminum Alloy Microstructure Properties
- Electrical Contact Performance and Analysis
- Geotechnical Engineering and Underground Structures
- Vacuum and Plasma Arcs
- Grouting, Rheology, and Soil Mechanics
- Lattice Boltzmann Simulation Studies
- Fluid Dynamics and Heat Transfer
- solar cell performance optimization
- Geomechanics and Mining Engineering
- Legal and Policy Issues
- Metallurgy and Material Science
- Civil and Geotechnical Engineering Research
- Geotechnical Engineering and Analysis
- Advancements in Solid Oxide Fuel Cells
- Metal and Thin Film Mechanics
- Vibration and Dynamic Analysis
- Semiconductor Quantum Structures and Devices
- Advanced Measurement and Detection Methods
- Enzyme-mediated dye degradation
- Technology and Security Systems
- Topology Optimization in Engineering
- Plant Gene Expression Analysis
- Tribology and Lubrication Engineering
Harbin Engineering University
2023
Baotou Teachers College
2021
Sichuan University
2007-2021
University of Nottingham Ningbo China
2014-2019
Southwest Jiaotong University
2015-2016
CCCC Highway Consultants (China)
2014
Montanuniversität Leoben
2010-2012
Huazhong University of Science and Technology
2007-2009
University of Oxford
2006
Science Oxford
2006
Pantograph-catenary (PC) arc has become an obstacle for the further development of high-speed railway. Understanding on underlying physical mechanisms PC dynamics is still far away from satisfactory; therefore, researches both experimental and numerical aspects are urgently required. This paper focused dynamic characteristics during pantograph lowering process by simulation method. A model was established based classical magnetohydrodynamics theory, with temporal evolution considered. The...
Recombinant glucose oxidase from Aspergillus niger expressed in Pichia pastoris by fed-batch fermentation was purified and assessed with 1·26 purification fold to homogeneity using Q-Sepharose F.F. chromatography. The enzyme determined SDS-PAGE gradient PAGE, which showed a dimeric form of 150 kDa. rGOD proved be glycoprotein, the content estimated 36·7 25·14% phenol-sulfuric acid anthrone-sulfuric methods. Characteristics demonstrated that highest activity pH 6·0 at 40°C stable broad range...
The performance of the pantograph–catenary system plays a significant role in determining reliability and safety high-speed train. With an increase train speed, repeated separations between pantograph catenary result increased number arcing events, which exacerbate levels damage on system, leading to frequent accidents. event is complex phenomenon that influenced by various factors, involves interactions electromagnetic, thermal airflow fields. high temperatures generated arc ablation...
Pantograph-catenary (PC) arc has become one of important factors which effect the behaviors pantograph-catenary system. Understanding on underlying physical mechanisms PC dynamics is still far away from satisfactory, therefore researches both experimental and numerical aspects are urgently required. This paper focuses dynamic characteristics during pantograph lowering process by simulation method. A model established based classical magneto-hydrodynamics (MHD) theory, with temporal evolution...
Abstract With the increasing demands for large scale and high productivity, polymer pipes are recently produced using advanced spiral mandrel dies. However, fundamental research related to melt flow mechanism in die pipe extrusion is lagging behind. In present study, mathematical model such a complex three‐dimensional non‐isothermal viscous of melts obeying power law was developed based on computational fluid dynamics theory. Finite volume element method applied predict rheological behaviors...
A theoretical model on accumulation of temperature and stress in a three-junction GaAs solar cell is proposed to analyze its damage characteristics while irradiated by multipulse laser. The distribution effect with different pulse widths are calculated. Specifically, the influences energy duty ratio discussed. Results show that weakened as decrease differ widths. rate more rapid than under nanosecond laser irradiation. Furthermore, tensile main form irradiation, melting will change from millisecond
In semi condinuous casting of technincal bronze alloys homogenuous microstructure is very important for the assurance material properties. The improvement knowledge about both, thermodynamics ternary system Cu-Sn-P and solidification process main interest involved industry. To describe these alloys, in Cu-rich corner experimentally investigated. DSC measurements, diffusion annealing experiments have been performed compared with computational based on Calphad approach. so defined...
Level Set Method is an appropriate mathematical tool for solving two-phase flow problems. The main advantage of its efficiency to deal with complex interfaces, even if topology changes. In this paper, the liquid-gas simulated using a combination and SOLA method. used compute Navier-Stokes equation, track interfaces between liquid gas during mold filling process. difficulty in simulation comes from great change physical parameters (e.g., density viscosity) across interfaces. allows large...
A three-phase Eulerian approach is used to model the columnar-to-equiaxed transition (CET) during solidification in DC casting of technical bronze. The three phases are melt, solidifying columnar dendrites and equiaxed grains. They considered as spatially interpenetrating interacting continua by solving conservation equations mass, momentum, species enthalpy for all phases. so defined applied a binary CuSn6 process benchmark demonstrate potentials. Two cases studied: one considering only...
Time series foundation models have demonstrated strong performance in zero-shot learning, making them well-suited for predicting rapidly evolving patterns real-world applications where relevant training data are scarce. However, most of these rely on the Transformer architecture, which incurs quadratic complexity as input length increases. To address this, we introduce TSMamba, a linear-complexity model time forecasting built Mamba architecture. The captures temporal dependencies through...
The heat transfer during the casting solidification process includes: radiation of high temperature and mold, convection between conduction in to mold. In this paper, a formula time step simulation is derived, considering radiation, based on conservation energy. different condition ordinary sand permanent mold taken into account formula. characteristic interior surface also considered. numerical experiments show that can avoid computation, improve computational efficiency about 20% process.
High-Pressure Die-Casting (HPDC) is an important process for manufacturing high-volume and low-cost components. In this molten metal injected at high speed under pressure into the die cavity, which often leads to entrapment of air liquid metal. This will cause porosity after solidification, main defect in parts made by HPDC. The aim work was develop a CFD multiphase flow simulation method numerically study formation Some numerical models have been developed predict However, most them are...
A 3-phase Eulerian approach is used to model the macrosegregation during solidification in direct chill (DC) casting of binary bronze (Cu-Sn). The three phases are melt, solidifying columnar dendrites and equiaxed grains. thermodynamic information Cu-Sn included based on published data, which coupled with model. occurrence columnar-to-equiaxed transition (CET), phase interactions, feeding flow, sedimentation their influence considered applied a laboratory DC process as benchmark demonstrate...