A5100381466- Magnetic Bearings and Levitation Dynamics
- Robot Manipulation and Learning
- Electric Motor Design and Analysis
- Advanced Fiber Laser Technologies
- Laser-Matter Interactions and Applications
- Industrial Technology and Control Systems
- Teleoperation and Haptic Systems
- Reinforcement Learning in Robotics
- Advanced Measurement and Detection Methods
- Advanced Combustion Engine Technologies
- Nonlinear Photonic Systems
- Iterative Learning Control Systems
- Hydraulic and Pneumatic Systems
- Photonic Crystal and Fiber Optics
- Vehicle emissions and performance
- High-Voltage Power Transmission Systems
- Robotic Mechanisms and Dynamics
- Building Energy and Comfort Optimization
- Sensorless Control of Electric Motors
- Robotic Path Planning Algorithms
- Quantum optics and atomic interactions
- Advanced Algorithms and Applications
- Simulation and Modeling Applications
- Advanced machining processes and optimization
- Adaptive Dynamic Programming Control
Northwestern Polytechnical University
2013-2024
National University of Defense Technology
2010-2024
Systems Engineering Society of China
2024
China Design Group (China)
2024
Fudan University
2021-2024
Xi'an Jiaotong University
2014-2023
University of Electronic Science and Technology of China
2023
Zhejiang University
2021-2023
Sichuan University of Science and Engineering
2014-2023
China National Nuclear Corporation
2023
The dynamics of wave packets in the fractional Schrödinger equation is still an open problem. difficulty stems from fact that Laplacian derivative essentially a nonlocal operator. We investigate analytically and numerically propagation optical beams with harmonic potential. find one- two-dimensional input chirped Gaussian not harmonic. In one dimension, beam propagates along zigzag trajectory real space, which corresponds to modulated anharmonic oscillation momentum space. two dimensions,...
This paper proposes an improved disturbance observer to realize accurate contact force estimation using the joint torque sensor. The sensor separates dynamics of link side from motor robot manipulator. Therefore, only computing partial on can external estimation. considerably reduce modeling workload and error terms that may affect results. Furthermore, this presents observed residual value during free motion be considered as friction dynamics, which is approximated by neural network (NN)...
Abstract Transition-metal dichalcogenides (TMDCs) and black phosphorus (BP) are typical 2D materials with layer-dependent bandgaps, which emerging as promising saturable absorption for pulsed fiber lasers. In this review, we discuss the nonlinear properties of TMDCs BP, summarize recent progress absorbers from fabrication methods to incorporation strategies. The performances Q-switched/mode-locked lasers at different wavelengths summarized compared give a comprehensive insight optical...
We analytically and numerically investigate an anharmonic propagation of two-dimensional beams in a harmonic potential. pick noncentrosymmetric common interest that carry orbital angular momentum. The examples studied include superposed Bessel-Gauss (BG), Laguerre-Gauss (LG), circular Airy (CA) beams. For the BG beams, periodic inversion, phase transition, rotation with velocity are demonstrated during propagation. LG CA inversion variable still there but not transition. On whole, "center...
We experimentally demonstrate the Talbot effect resulting from repeated self-reconstruction of a spatially intensity-modulated probe field under Fresnel near-field regime. By launching beam into an optically induced atomic lattice (established by interfering two coupling fields) inside rubidium vapor cell, we can obtain diffracted pattern formed electromagnetically grating (EIG) in three-level $\Lambda$-type Doppler-free configuration with assistance transparency (EIT). The EIG-based...
In this brief, impedance adaptation is investigated for robots interacting with unknown environments, subject to environment dynamics and position parameters. A cost function that measures the tracking error interaction force defined, a complete state-space considering desired trajectory, dynamics, parameters presented. The unobservable lead part of system as well states in model. To end, output feedback adaptive dynamic programming (OPFB ADP) method selected realize optimized adaptation....
Typical underwater images exhibit poor visibility because of light scattering and absorption in turbid water. To resolve the ill-posed problem, a novel image enhancement method based on Removing Light Source Color Dehazing(RLSCD) is proposed. Scene depth, which assumed strongly correlated with attenuations, often ignored most previous methods. A new scene depth estimation, takes attenuations different conditions into account, first presented. Additionally, background estimated gray open...
We have experimentally generated a vortex six-wave mixing (SWM) signal via photonic band gap structure in hot atomic ensemble. The output SWM carrying orbital angular momentum, transferred from probe beam, has the interaction with nonlinear effect multilevel system. Our results show that spatial image can be modulated by detunings and intensities of related generating fields. Also, nonreciprocal feature is demonstrated. Such characteristics potentially used information processing.
Hyperuricemia, a major worldwide burden on public hygiene, is closely connected with dietary habits. However, few studies have evaluated the association of diversity hyperuricemia. To preliminarily reveal status diversified diet in preventing hyperuricemia based neighborhood-based, massive-scale cohort China, total 43,493 participants aged 20–74 years old, no history at baseline, were enrolled research from April 2016 to December 2019. The Dietary Diversity Score (DDS) was utilized evaluate...
We demonstrate the dual accelerating Airy-Talbot recurrence effect, i.e., self-imaging of optical beams, by propagating a superposition Airy beams with successively changing transverse displacements. The effect is spontaneous recurring imaging input and alternating component signs. It results from constructive interference wave functions, which also responsible for other kinds example, breathers. An composed finite-energy displays but it demands large displacement diminishes fast along...
In this article, a novel interactioncontrol is presented to resolve the optimized robot-environment interaction control problems subject flexible environment with unknown dynamics parameters. A cost function measuring trajectory tracking error as well noninertial force defined. complete state-space equation considering robot desired trajectory, object and position parameters also address problem. The improved Q-learning method developed fundamental of proposed deal challenges brought by...
The construction of eco-city is a hot spot nowadays, aiming to build harmony between human and nature. Ecological city able deal with the relationship environment, whose key point establish comfortable outdoor thermal environment. To evaluate built microclimate campus area located in Northwest China was selected. Different scenarios extra greening, high albedo pavement materials, water body their combinations were numerically analyzed through Universal Thermal Climate Index (UTCI)...