A5100345578- Aerodynamics and Fluid Dynamics Research
- Wind and Air Flow Studies
- Fluid Dynamics and Vibration Analysis
- Railway Engineering and Dynamics
- Aerodynamics and Acoustics in Jet Flows
- Vehicle emissions and performance
- Engineering Applied Research
- Advanced Antenna and Metasurface Technologies
- Antenna Design and Analysis
- Electromagnetic wave absorption materials
- Microwave Engineering and Waveguides
- Vehicle Noise and Vibration Control
- Infection Control and Ventilation
- Metamaterials and Metasurfaces Applications
- Advanced Measurement and Detection Methods
- Allelopathy and phytotoxic interactions
- Smart Grid and Power Systems
- Vehicle Dynamics and Control Systems
- Evacuation and Crowd Dynamics
- Traditional Chinese Medicine Analysis
- Vibration and Dynamic Analysis
- Evaluation Methods in Various Fields
- Traffic control and management
- Railway Systems and Energy Efficiency
- Fire dynamics and safety research
Southwest Jiaotong University
2016-2025
Jiangsu University of Science and Technology
2024
China Agricultural University
2022-2024
Ministry of Agriculture and Rural Affairs
2024
Southwest China Institute of Electronic Technology
2023-2024
Peking University
2024
Nanjing Forestry University
2023
Nanjing University of Science and Technology
2022
Guangxi University of Chinese Medicine
2022
Hong Kong Polytechnic University
2022
Nowadays, the rapidly development of advanced antidetection technology raises stringent requirements for microwave absorption materials (MAMs) to focus more attention on wider bandwidth, thinner thickness, and lower density. Adding magnetic medium realize broadband may usually result in decline service performance accelerating corrosion MAMs. Chiral MAMs can produce extra loss without adding due unique electromagnetic cross polarization effect. However, efforts should be taken furtherly...
Vortex generator (VG) is one of the potential technical tools to reduce aerodynamic resistance high-speed trains. The passive control reduction research a train carried out by using VG. Three typical installation locations, including flow separation point, boundary layer mutation and streamline transition location, several nearby locations were selected study effect VG location on characteristics. results show that tail car drag significantly reduced when arranged at mutation, car's can be...
Double-unit trains increase passenger capacity but also energy consumption. Therefore, research about the aerodynamic resistance of a double-unit train is great importance to save energy. In this study, commercial long-marshalling high-speed and 8 kinds are used investigate effect gap length on resistance. The results show that 8.5%-12.9% larger than train. It tail car (CC1 car) first single-unit head (CC2 second lead difference in For with different length, increases incrementally which...
The design of the cavity structure is one effective means to reduce resistance and noise pantograph installed on roof a high-speed train. This research first investigated flow acoustic characteristics with four different structures, namely rectangular (original), rounded edge (case 1), other two cavities asymmetric 2) symmetric 3) connecting tubes. results show that three treatment methods all improve aerodynamic performance, model case 2 determined be optimal structure. In 2, tube at front...
Exploring ways to minimize drag and noise for high speed train pantographs is critical. This study investigates the effects of incorporating holes in panhead as a potential solution reducing noise. Using an improved delayed detached eddy simulation (IDDES) model applying Ffowcs Williams Hawkings (FW-H) equation far-field prediction, aerodynamic characteristics with without are analyzed compared. The results show that opening streamwise hole on pantograph can affect vortex wake when airflow...
Abstract The numerical simulation based on Reynolds time-averaged equation is one of the approved methods to evaluate aerodynamic performance trains in crosswind. However, there are several turbulence models, may present different performances crosswind using models. In order select most suitable model, inter-city express 2 (ICE2) model chosen as a research object, 6 models used simulate flow characteristics, surface pressure and forces train crosswind, respectively. standard k-ε ,...
A novel wideband circularly polarized (CP) antenna with a stair-shaped dielectric resonator and an open-ended slot ground is introduced. By adjusting parameter values of the hybrid structure, CP characteristics can be realized. In order to improve impedance matching enhance axial-ratio (AR) bandwidth, also inserted in plane. The fully studied manufactured. Measured results show that proposed has 10-dB return loss 71.7% (3.844-8.146 GHz) 3-dB AR bandwidths 46.0% (4.15-6.63 GHz), respectively,...
Owing to multiple-electron transfer of producing CH4 from photocatalytic CO2 reduction (CO2PR), a great challenge is achieving high selectivity CH4, especially under long-wavelength irradiation. Herein, we synthesize series monolayer Ni3X-layered double hydroxide (LDH) (m-Ni3X-LDH, X = Cr, Mn, Fe, Co). When applied for CO2PR, the exhibits volcano-like trend with highest point at m-Ni3Mn-LDH using Ru-complex as photosensitizer. After further optimization, nearly 99% achieved irradiation λ 600...
Shear stress transport (SST) k–ω model and detached eddy simulation (DES) have been widely applied in crosswind stability simulations for trains the literature. In previous research, influence of SST DES approaches on flow field around trains, which affects surface pressure consequently aerodynamic forces train, was not properly investigated terms their field. The improved delayed (IDDES) turbulence models tested this study ability to predict around, pressure, a 1/25th scale Class 390 train...
Using high robust radiomic features in modeling is recommended, yet its impact on model unclear. This study evaluated the model's robustness and generalizability after screening out low-robust before modeling. The results were validated with four datasets two clinically relevant tasks.A total of 1,419 head-and-neck cancer patients' computed tomography images, gross tumor volume segmentation, outcomes (distant metastasis local-regional recurrence) collected from publicly available datasets....
Field test and computational fluid dynamics (CFD) method are conducted to investigate the safety of high-speed train under unsteady crosswind. Wheel–rail forces passing a breach between two windbreaks strong crosswind measured in field test. The derailment coefficient first wheelset front car at windward side reaches allowable value. Meanwhile, left right lateral wheel–rail force opposite direction. This kind phenomenon has not been tested before. Therefore, CFD multi-body simulations...
In this paper, the effect of strip spacing on aerodynamic performance a high-speed pantograph with double-strip is numerically studied using shear stress transport turbulence model. Seven different spacings varied from 100 to 700 mm are considered. The errors in resistance between numerical simulation and wind tunnel test within 5% both knuckle-downstream knuckle-upstream operating conditions. drag lift forces increase when train's running speed 350 km/h. By considering two strips...
In this work, a multiobjective aerodynamic optimization of high-speed train head was performed to improve the performance running on an embankment under crosswinds. Seven design variables were selected control five regions head. The total drag force, lift and side force coach set as objectives. optimal Latin hypercube sampling method used obtain values sample points. deformed using free-form deformation approach through which mesh morphing without remodeling re-meshing. Then, performances...
Based on the classical 1-D isentropic theory, relationship between critical blocking ratio and incoming flow Mach number in evacuated tube is deduced this paper. Next, a simplified 2-D train (ETT) model used to reveal distribution characteristics of field by CFD. The results show that whether shock waves are fully developed corresponds there turning point change ETT drag or wall pressure. maximum minimum pressure has same trend as wall. Linear relationships exist after point. Because...
Abstract Intelligent electromagnetic interference (EMI) shielding materials, with their tunable EM wave response characteristics, have attracted much attention. However, the molecular‐level mechanism is under‐explored and tuning range narrow. This study proposes an EMI switch hydrogel based on molecular precision manipulation of a thermoresistive network capable adaptively regulating performance. It has two temperature‐controlled switching states: on/off strong/weak shielding. The consists...