A5037224266- Adaptive Control of Nonlinear Systems
- Hydrology and Watershed Management Studies
- Flood Risk Assessment and Management
- Iterative Learning Control Systems
- Optical Imaging and Spectroscopy Techniques
- Advanced Measurement and Detection Methods
- Stability and Control of Uncertain Systems
- Photoacoustic and Ultrasonic Imaging
- Spacecraft and Cryogenic Technologies
- Cruise Tourism Development and Management
- Gear and Bearing Dynamics Analysis
- Image Processing Techniques and Applications
- Educational Assessment and Pedagogy
- Hydrology and Sediment Transport Processes
- Adaptive Dynamic Programming Control
- Thermography and Photoacoustic Techniques
- Mechanical Engineering and Vibrations Research
- Education and Critical Thinking Development
- Maritime Navigation and Safety
- Fluid Dynamics Simulations and Interactions
- Science Education and Pedagogy
- Advanced Steganography and Watermarking Techniques
- Cryospheric studies and observations
- Image Retrieval and Classification Techniques
- Image and Signal Denoising Methods
Beijing Normal University
2014-2024
Chengdu University of Information Technology
2024
The Ohio State University
2017-2022
Yanshan University
2018-2022
Collaborative Innovation Center of Advanced Microstructures
2017-2021
Nanjing University
2017-2021
City University of Hong Kong, Shenzhen Research Institute
2020
Northeastern University
2020
Chinese Academy of Sciences
2019
Institute of Mechanics
2019
Abstract Space‐borne instruments can measure river water surface elevation, slope, and width. Remote sensing of discharge in ungauged basins is far more challenging, however. This work investigates the estimation from simulated observations forthcoming Surface Water Ocean Topography (SWOT) satellite mission using a variant classical variational data assimilation method “4D‐Var.” The scheme simultaneously estimates discharge, bathymetry, bed roughness context 1.5 D full Saint‐Venant hydraulic...
Abstract The upcoming Surface Water and Ocean Topography (SWOT) mission will measure water surface heights widths for rivers wider than 100 m. At its native resolution, SWOT height errors are expected to be on the order of meters, which prevent calculation slopes use slope‐dependent discharge equations. To mitigate width errors, high‐resolution measurements grouped into reaches (∼5 15 km), where slope estimated. We describe three automated river segmentation strategies defining optimum...
Abstract Transceiving ultra-weak sound typically relies on signal pre-amplification at the transmitting end via active electro-acoustic devices, which inherently perturbs environment in form of noise that inevitably leads to information leakage. Here we demonstrate a passive remote-whispering metamaterial (RWM) enabling weak airborne audible frequencies reach unprecedented enhancement without altering detected ambient soundscape, is based extraordinary scattering properties formed by pair...
Abstract The goal in this commentary is to share the development of NASA Applied Science pre‐launch protocol called Early Adopter Program (EAP) that designed build user‐readiness planned satellite Earth observing missions proactively and before launch . Here we focus particular on Surface Water Ocean Topography mission EAP as an illustration benefits such a program proactive sustained user community engagement. Such will be value other observation are currently service, scheduled for or...
Existing publicly available digital elevation models (DEMs) provide global-scale data but are often not precise enough for studying processes that depend on small-scale topographic features in rivers. For example, slope breaks and knickpoints rivers can be important understanding tectonic processes, riffle-pool structures drivers of riverine ecology. More (e.g. lidar) some areas, their spatial extent limits large-scale research. The upcoming Surface Water Ocean Topography (SWOT) satellite...
Abstract The development of students' core competencies for the future society has become a shared goal in curriculum reform worldwide. Efforts are being made to investigate which should be cultivated and how they relate content. Specifically, designing competency-oriented intended translating it into implemented common concerns challenges encountered by countries during reform. In order promote mutual sharing learning among different regions, Organization Economic Co-operation Development...
A mathematical model of an injector powered transonic wind tunnel is developed in this paper. The whole running process divided into three stages and the each child processes established respectively. data applied to parameter identification obtained from actual process. NARMAX adopted as structure parameters including order sampling interval are identified by means false nearest neighbors algorithm mutual information accordingly. non-linear mapping between inputs outputs completed BP neural...
Acoustic scattering medium is a fundamental challenge for photoacoustic imaging. In this study, we reveal the different coherent properties of waves and direct in matrix form. Direct show particular coherence on antidiagonals matrix, whereas do not. Based property, correlation filter combining with time reversal operator proposed to preserve recover image behind layer. Both numerical simulations imaging experiments demonstrate that approach effectively increases contrast decreases background...
In the inhomogeneous medium, acoustic scattering is always a fundamental challenge for photoacoustic imaging. We implement correlation full-matrix filter (CFMF) combing with time reversal operator to improve imaging quality of sources in complex media. The filtering process extracts direct wave component from detected signal and preserve all useful information at same time. A location factor considered compensate image distortion false contrast caused by limited-view detection. numerical...
Using the two-tooth difference swing-rod movable teeth transmission system satisfying drive function of large optical instruments as study object, influence each component error on is analysed. Each presented by vector method, and then it transformed into equivalent in direction meshing action line based principle. The instantaneous ratio obtained velocity center model established. numerical analysis, obtained. test platform used to analyze system. research results show that length wave...
In this paper, we propose a content-based binary image authentication scheme. At first, use Zernike moments magnitudes (ZMM) to generate the feature vector and demonstrate that can represent decide its authenticity effectively. Then watermark is generated by quantizing ZMMs embedded into image. The doesn't need original watermark. decision depends on distance between extracted of test metric measure. To decrease influence watermarking vector, split two parts random mask, one for generating...
Photoacoustic (PA) tomography (PAT) has potential for use in brain imaging due to its rich optical contrast, high acoustic resolution deep tissue, and good biosafety. However, the skull often poses challenges transcranial imaging. The can cause severe distortion attenuation of phase amplitude PA waves, which leads poor resolution, low strong noise images. In this study, we propose an image reconstruction method recover insider a skull-like scattering layer. This reduces artifacts by...
A kind of non-delay optimal control problem for nonlinear time-delay systems affected by external disturbance with quadratic performance index is considered. Through the Artstein transformation, system translated into simple without delay. Then finite horizon and infinite are discussed, we get approximate law solving a Riccati matrix equation two Stein equations using successive approximation method. simulation example shows that approach effective robust respect to exogenous persistent disturbances.
The structure of the full flexible nozzle in 0.6m×0.6m trans-supersonic wind tunnel and it's working principle features were introduced. Combined with mechanical features, various control structures comparative analyzed a multi-motor proportion synchronization method which based on virtual shaft was proposed. According to error tracking requirement system, simulation platform build system four electric cylinders using MATLAB, convergence robustness tested verified. In order stably,...