A5100451973- Thin-Film Transistor Technologies
- Adaptive Control of Nonlinear Systems
- Silicon and Solar Cell Technologies
- Optical Coatings and Gratings
- Iterative Learning Control Systems
- Sensorless Control of Electric Motors
- Silicon Nanostructures and Photoluminescence
- Nanowire Synthesis and Applications
- Magnetic Bearings and Levitation Dynamics
- Hydraulic and Pneumatic Systems
- Electric Motor Design and Analysis
- Metallic Glasses and Amorphous Alloys
- Advanced Control Systems Optimization
- Industrial Technology and Control Systems
- Graphene research and applications
- Power Systems and Renewable Energy
- Structural Health Monitoring Techniques
- High voltage insulation and dielectric phenomena
- Image Enhancement Techniques
- Proteins in Food Systems
- Mechanical Engineering and Vibrations Research
- Thermal properties of materials
- Near-Field Optical Microscopy
- Smart Grid Energy Management
- Gear and Bearing Dynamics Analysis
Hefei University of Technology
2016-2025
Duke Energy (United States)
2023
CRRC (China)
2022
Massachusetts Institute of Technology
2022
Huazhong University of Science and Technology
2020
The University of Texas at Austin
2019
Institute of Physics
2019
Chinese Academy of Sciences
2019
North Carolina State University
2018
Beihang University
2011-2012
Because of their weak interlayer bonding, van der Waals (vdW) solids are very sensitive to external stimuli such as strain. Experimental studies strain tuning thermal properties in vdW have not yet been reported. Under ∼9% cross-plane compressive created by hydrostatic pressure a diamond anvil cell, we observed an increase conductivity bulk MoS_{2} from 3.5 about 25 W m^{-1} K^{-1}, measured with picosecond transient thermoreflectance technique. First-principles calculations and coherent...
Second sound refers to the phenomenon of heat propagation as temperature waves in phonon hydrodynamic transport regime. We directly observe second graphite at temperatures over 200 K using a sub-picosecond transient grating technique. The experimentally determined dispersion relation thermal-wave velocity increases with decreasing period, consistent first-principles-based solution Peierls-Boltzmann equation. Through simulation, we reveal this increase result thermal zero sound-the due...
What a relief! In 1955, strain release was put forward as reactivity factor to explain the differing of axial and equitorial alcohols during oxidation. The same rationale may account for rates activation between CH bonds in processes (see scheme). Detailed facts importance specialist readers are published "Supporting Information". Such documents peer-reviewed, but not copy-edited or typeset. They made available submitted by authors. Please note: publisher is responsible content...
A novel robust control strategy is proposed in this work to address the dynamic problem of permanent magnet synchronous motors (PMSM) position tracking and lessen effect system parameter load fluctuations on performance PMSM. The improved by a element built with Lyapunov method reduce impact uncertain factors such as uncertainty, nonlinear friction, external interference; nominal stabilized dynamics model. uniformly bounded final systems are proven, associated conclusions provided using...
This paper studies a prescribed performance adaptive robust control (PPARC) scheme for uncertain robotic manipulators. First, state transformation is introduced to embed the predefined output constraints into trajectory tracking servo constraints. Second, PPARC designed fulfill reference and ensure errors within regardless of uncertainty initial condition deviations. Then, Lyapunov stability analysis conducted prove uniform boundedness (UB) ultimate (UUB) error. Moreover, optimization...
Radial clearance, particularly the axial clearance in 3D joint of a mechanism owing to assemblage, manufacturing tolerances, wear, and other conditions, has become research focus field multibody dynamics recent years. In this study, hydraulic cylinder model with joints was constructed by combining various potential contact scenarios. The novelty study is that points between bearing wall journal were calculated when circle projected an ellipse misalignment axes. Moreover, simulation...
The control performance of permanent magnet linear synchronous motor (PMLSM) is limited by uncertainty. uncertainty bounded an unknown bound and may be time-varying. boundary information but can described fuzzy set theory. To mitigate the impact on performance, this paper proposes a Udwadia–Kalaba theory-based adaptive robust (UKBARC). proposed controller contains controller. In controller, expected trajectory taken as constraint, then task converted to make constraint followed....
Clearance exists in the joint of a mechanism because assemblage, manufacturing tolerances, wear, and other conditions, it is focus research field multibody dynamics. This study built planar hydraulic rock‐breaker model with multiple clearances by combining cylinder model, clearance joints based on Lankarani–Nikravesh contact force Lagrange multiplier method. Dynamic simulation results indicated that can degrade dynamic responses which be decomposed to rapid vibrations slow movements. The are...
By developing a deeper understanding of the formation mechanism and origin stability, we report simple large-scale fabrication approach to create Janus emulsions that can be controlled in size, geometry stability.
We present a theoretical crystalline silicon thin-film solar cell with concave quadratic bottom gratings using parametric design of the and systematically perform optoelectronic simulations proposed grating structures. Numerical results reveal that structure leads to desirable enhancement light absorption in near-IR region (750-1100 nm), this is dominated by TE-polarized light. The mechanisms under are based on hybrid effect optical waveguide modes Fabry-Perot modes. Moreover, research...
We systematically investigate the light-trapping schemes of crystalline silicon thin-film solar cells (TFSCs) for three common grating layouts via one-dimensional super-quadratic subwavelength gratings. The effects antireflective coating, absorber layer thickness, and geometry on performance TFSCs are numerically studied using finite-difference time-domain method. results suggest that conformal aluminum-doped zinc oxide (AZO) coatings have better optical properties than plane AZO coatings....
We theoretically introduce a Si-based photovoltaic absorber with different grating profiles, which demonstrates desirable enhancement of light absorption in the near-infrared region by increasing degree grating's profile function. The mechanisms originate from synergetic effect optical waveguide modes, scattering, and Fabry–Perot resonances. Moreover, numerical results indicate that convex structure is more conducive to excitation modes compared concave structure. research findings can be...
A ceramic insulator has an excellent anti-pollution performance, but sometimes flashover occurs on it and then the outage of power network follows. This paper analyzes formation mechanism result is that RMS leakage current(LC) discharge pulses reflect contamination severity approximately. shows to a large extent accident can be avoided by means monitoring current value pulses. Existing device for contaminated insulators inspects either currents or pulses, also, difficult meet requirements...
In 2005, a bicontinuous arrangement of domains was explored by large-scale computer simulations. binary liquid host, the behaviors neutrally wetting particles were simulated following an instantaneous quench into demixed region. As two mutually immiscible liquids phase separate, can be swept up freshly created interface and jam together as coarsen, forming particle-stabilized between continuous phases. This type material is known “bicontinuous interfacially jammed emulsion gel” (Bijel), has...
Crystalline silicon thin-film solar cells with period-mismatched sine dual-interface gratings are proposed. Several structural parameters of the front and rear gratings, such as heights, periods, duty ratios, optimized using finite-difference time-domain method. The mechanisms absorption enhancement also illustrated by analyzing optical electrical performance in different grating arrangements. Numerical results indicate that structure shows obvious improvement efficiency is more suitable for...