Lei Cheng

ORCID: 0000-0002-2776-7434
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About
Contact & Profiles
Research Areas
  • Environmental remediation with nanomaterials
  • Image Processing Techniques and Applications
  • Electrokinetic Soil Remediation Techniques
  • Advanced Vision and Imaging
  • Optical measurement and interference techniques
  • Groundwater flow and contamination studies
  • Photoacoustic and Ultrasonic Imaging
  • Nanoparticles: synthesis and applications
  • Power Line Inspection Robots
  • Remote Sensing and LiDAR Applications
  • Synthetic Aperture Radar (SAR) Applications and Techniques
  • 3D Surveying and Cultural Heritage
  • Retinal Diseases and Treatments
  • Optical Coherence Tomography Applications
  • Wireless Communication Security Techniques
  • Heavy metals in environment
  • GaN-based semiconductor devices and materials
  • Ocular and Laser Science Research
  • Nanomaterials for catalytic reactions
  • Mineral Processing and Grinding
  • Geophysical and Geoelectrical Methods
  • Organic Light-Emitting Diodes Research
  • Fault Detection and Control Systems
  • Geophysical Methods and Applications
  • Perovskite Materials and Applications

Hong Kong Polytechnic University
2017-2025

Hefei Institutes of Physical Science
2024

High Magnetic Field Laboratory
2024

University of Science and Technology of China
2024

Anhui Agricultural University
2021-2022

Zhejiang University
2016-2021

China Electric Power Research Institute
2020

Wuhan University of Technology
2017

Jacobs (United States)
2010

The Retina Center
2010

The primary challenge in commercializing perovskite solar cells (PSCs) mainly stems from fragile and moisture-sensitive nature of halide materials. In this study, we propose an asynchronous cross-linking strategy. A multifunctional initiator, divinyl sulfone (DVS), is firstly pre-embedded into precursor solutions. DVS, also as a special co-solvent, facilitates intermediate-dominated crystallization manipulation, favouring formamidine-DVS based solvate transition. Subsequently, DVS-embedded...

10.1038/s41467-024-55414-4 article EN cc-by-nc-nd Nature Communications 2025-01-02

In recent years, studies have shown that independent components of local windows natural images resemble the receptive fields cells in early stages mammalian visual pathway. However, role independence recognition is not well understood. We argue resolves curse dimensionality by reducing complexity probability models to linear order dimension. addition, we show empirically reduction does degrade performance on all data sets used with an spectral representation. this representation, input...

10.1364/josaa.20.001271 article EN Journal of the Optical Society of America A 2003-07-01

The calibration of camera systems employing zoom lenses raises several challenges, as changes in lens control settings introduce various imaging conditions, especially different degrees defocus. This article presents a Fourier-based defocus method to calibrate attached with an electronically focus-tunable (ETL). Different from the traditional which requires changing scale object for sharp images, proposed is more concerned frequency characteristics captured images than gray distributions....

10.1109/tim.2021.3097412 article EN IEEE Transactions on Instrumentation and Measurement 2021-01-01

Fisheye lens is widely employed in many practices due to its wide field-of-view (FOV) and portability. There are however serious image distortions followed up with the fisheye lens. To address problem, this letter proposed a pixel-wise correction method based on single-view phase target. Compared traditional methods which rely specific model calibrate parameters of distortion, can establish pixel-to-pixel mapping between distortion ideal undistortion without modeling, more flexible efficient...

10.1109/lpt.2022.3199616 article EN IEEE Photonics Technology Letters 2022-08-17

Pneumatic control valves are the most frequently used actuators in industrial processes. Its property definitely affects performance of processes and therefore process monitoring pneumatic valve is great importance. Canonical Variate Analysis (CVA) a multivariate data-driven method which considers time correlations has been demonstrated to be superior some methods certain benchmark case studies. Inspired by successful application CVA technique industry, we firstly monitor using demonstrate...

10.1109/cac.2017.8243249 article EN 2017-10-01

A numerical simulation of the electromagnetic scattering characteristics ultra-high-voltage (UHV) power line at X-band over a wide range incidence angle is presented. The geometry and material properties UHV are first described, then high frequency method (HFM) used to analyze its X-band. Here, two shapes considered, including symmetrical parabola in case where adjacent pylons have same height, inclined catenary heights different. results show that influenced by angle, height difference...

10.1109/iccc51575.2020.9345200 article EN 2020-12-11

This paper proposes a large depth-of-field (DOF) imaging method, which uses an image acquisition system equipped with liquid lens. also establishes the relationship between focusing distance and current value to estimate object distance. The proposed method firstly lens capture multi-focus images. Then different objects in scene are segmented by processing algorithm. we apply effective blur estimation algorithm on each determine clearest from all images obtain corresponding value. Finally,...

10.1117/12.2606953 article EN Twelfth International Conference on Information Optics and Photonics 2021-11-01

Symmetric distributed source coding has made great progress in the past several years. However, few attempts have been tried to use symmetric schemes real data compression scenarios. In this paper, with inspiration of previous schemes, we first put forward a novel syndrome-based scheme which can achieve whole Slepian-Wolf rate region. Then propose general architecture for multiview video schemes. Our experiments show very encouraging results. high-rate case, our saving from separate H.264 at...

10.1109/icassp.2009.4959668 article EN IEEE International Conference on Acoustics Speech and Signal Processing 2009-04-01
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