A5038109693- Magnetic Properties of Alloys
- Risk and Portfolio Optimization
- Perovskite Materials and Applications
- Magnetic Properties and Applications
- Magnetic and transport properties of perovskites and related materials
- Water resources management and optimization
- Optical properties and cooling technologies in crystalline materials
- Railway Engineering and Dynamics
- Economic theories and models
- Optimization and Mathematical Programming
- Advanced Optimization Algorithms Research
- Solid-state spectroscopy and crystallography
- Hydrogen Storage and Materials
- Aluminum Alloys Composites Properties
- Multi-Criteria Decision Making
- Magnetic properties of thin films
- Face and Expression Recognition
- Game Theory and Applications
- Mechanical stress and fatigue analysis
- Climate change and permafrost
- Optimization and Variational Analysis
- Rough Sets and Fuzzy Logic
- Fuzzy Systems and Optimization
- Civil and Geotechnical Engineering Research
- Probabilistic and Robust Engineering Design
Xidian University
2023-2025
KTH Royal Institute of Technology
2021-2025
China Iron and Steel Research Institute Group
2021-2024
Qinghai University
2024
Xi'an Jiaotong University
2018-2021
Laboratoire de Recherche en Informatique
2018-2019
Université Paris-Sud
2018
Nippon Steel (Japan)
2014
Xi'an University of Architecture and Technology
2013
CCCC Highway Consultants (China)
2013
The efficient single-photon upconversion photoluminescence (UCPL) feature of lead halide perovskite semiconductors makes it promising for developing laser cooling devices. This is an attractive potential application, but the underlying physics still remains unclear so far. By using all-inorganic CsPbX3 (X = Br, I) nanocrystal samples, this phenomenon was investigated by (PL) and time-resolved PL under different temperatures various excitation conditions. A broad emission band located at...
The improvement of corrosion resistance for sintered Nd-Fe-B magnets is usually focused on the modification grain boundary phase. main phase similarly a key point to enhance resistance. In this work, novel magnet designed with addition Ni and Cr. This kind Nd-Ni-Fe-Cr-B maintains typical 2:14:1 tetragonal phase, metallurgical behavior Cr characterized by distribution in Accelerated electrochemical tests were conducted compare traditional magnet. Results show that exhibits superior It found...
We describe a facile method to synthesize silicon nanoparticles through plasma-assisted decomposition of tetrabromide, novel precursor for gas phase synthesis. Raman spectroscopy, transmission electron microscopy, energy dispersive X-ray spectroscopy and Fourier transform infrared analyses demonstrate that the obtained nanocrystals were covered with oxide layer. The can be easily dispersed in ethanol dispersion exhibited stable optical properties over half year, showing strong...
We investigate quasi-Newton methods for minimizing a strictly convex quadratic function which is subject to errors in the evaluation of gradients. The all give identical behavior exact arithmetic, generating minimizers Krylov subspaces increasing dimensions, thereby having finite termination. A BFGS method empirically known behave very well on problem small errors. also large-error scenarios, expected not so clear. In particular, we are interested matrices that differ from identity by...
Abstract The enhancement of coercivity in Nd-Fe-B sintered magnets modified by Pr 58 D y 10 Cu 32 alloy was investigated through scanning electron microscope（ SEM） and in-situ magneto-optic Kerr effect (MOKE) microscopy. modification treatment resulted the formation a smooth continuous weakly magnetic grain boundary layer (Nd,Pr,Dy) 2 Fe 14 B main phase with high magnetocrystalline anisotropy field, leading to an increased 23 kOe. MOKE observations revealed that dynamic evolution maze domain...
Abstract Controlling the phases of matter is a central task in condensed physics and materials science. In 2D magnets, manipulating spin orientation great significance context Mermin–Wagner theorem. Herein, systematic study temperature‐ pressure‐dependent magnetic properties up to 1 GPa van der Waals CrPS 4 reported. Owing temperature‐dependent change anisotropy energy, material undergoes first‐order reorientation transition with moments realigning from being almost parallel c axis ac plane...
Tetragonal CsPb2Br5 has attracted tremendous attention due to its high stability and strong green emission. But luminescence mechanism become controversial after it was found have an indirect band gap of 3.35 eV. Here, the phase structure a sample is confirmed by X-ray diffraction pattern absorption spectrum. The emission investigated temperature evolution features resonant Raman signals. wavelength large-scale blue shift with increasing from 10 300 K agree well that perovskite CsPbBr3,...
The exciton–phonon coupling plays a significant role in the optical property of lead halide perovskite semiconductors, but concerned phonon modes have not been well identified. Under resonant excitation and low temperature conditions, strong sharp Raman signals CsPbBr3 nanocrystals (NCs) were found to superimpose on fluorescence band free exciton, including both Stokes anti-Stokes signals. Also, two basic with energies 3.7 6.3 meV obtained, respectively. At same time, emission from...
This paper aims to comprehensively analyze the influence of principal stress angle rotation and intermediate on loess's strength deformation characteristics. A hollow cylinder torsional shear apparatus was utilized conduct tests remolded samples under both normal frozen conditions investigate mechanical properties behavior loess complex conditions. The results indicate significant differences in internal changes soil particles, unfrozen water, relative positions conditions, leading...
An interval-fuzzy chance-constrained integer programming (IFCIP) method is developed for contamination control of a fluid power system (FPS) under uncertainty. The model derived by incorporating the techniques fuzzy and within general interval-optimization framework. It can tackle uncertainties presented as both members discrete intervals. applied to case one-year planning FPS. Interval solutions associated different risk levels constraint violation are obtained, which be used generating...