A5018498689- Lightning and Electromagnetic Phenomena
- Fire effects on ecosystems
- High voltage insulation and dielectric phenomena
- Aerosol Filtration and Electrostatic Precipitation
- Plasma Diagnostics and Applications
- Thermal Analysis in Power Transmission
- Advanced Decision-Making Techniques
- Integrated Energy Systems Optimization
- Anomaly Detection Techniques and Applications
- Power Transformer Diagnostics and Insulation
- Power Line Inspection Robots
- Smart Grid Energy Management
- Icing and De-icing Technologies
- Currency Recognition and Detection
- Magnetic Properties and Applications
- Sustainable Industrial Ecology
- Plant Water Relations and Carbon Dynamics
- Electrohydrodynamics and Fluid Dynamics
- Process Optimization and Integration
- Wireless Power Transfer Systems
- Model Reduction and Neural Networks
- Electric Vehicles and Infrastructure
- Earthquake Detection and Analysis
- Surface Modification and Superhydrophobicity
- Tree Root and Stability Studies
Wuhan University
2020-2024
University of Science and Technology of China
2019-2021
Abstract Blue discharges are one type of rarely observed upward discharge emerging from the top thunderstorms. The favorable meteorological conditions and charge structures needed to produce this marvelous phenomenon still poorly understood. In study, we report on two midlatitude thunderstorms producing 13 blue simultaneously by Imager Sprites Upper Atmospheric Lightning (ISUAL) ground‐based lightning detection array. these thunderstorms, always occurred in vicinity coldest cloud (∼195 K)...
To investigate the possible impact of urban development on lightning activity, an eight-year (2010–2017) cloud-to-ground (CG) dataset provided by National-Wide Lightning Detection Network in China was analyzed to characterize CG activity metropolitan area Beijing. There is a high flash density over downtown Beijing, but different from previous studies, downwind Beijing not significantly enhanced. Compared with upwind area, enhanced about 50%. Negative flashes mainly occurred and industrial...
The triangulation of red sprites was obtained, based on concurrent observations over a mesoscale convective system (MCS) in North China from two stations separated by about 450 km. In addition, broadband sferics the sprite-producing lightning were measured at five ground stations, making it possible to locate and identify individual causative discharges for different elements this dancing sprite event. results our analyses indicate that produced above trailing stratiform region MCS, their...
Abstract Positive leaders branch less frequently than negative counterpart, and the physical processes properties of positive leader branching remain a mystery. We investigated 10 m laboratory discharges under four voltages using high‐speed video camera. differ from by either directly splitting or connecting with floating bidirectional to form branching, number branches shows correlation applied voltage, that is, branched channels increased 1 4 when voltage factor 1.5. Grounding points are...
ABSTRACT This study investigates discharge phenomena in suspended droplets using needle–needle electrodes. By employing ultrasonic suspension technology for noncontact droplet and high‐speed cameras capturing time‐resolved images, the examines impact of on characteristics morphology. Results show that alter electric field distribution, affecting paths. Low‐conductivity hinder discharge, causing deflection or changes channel, whereas high‐conductivity act as electrodes, facilitating channel...
The streamer discharge physical process can be described by the coupled Poisson's equation and convection–diffusion equation. It is a multi-physical field problem involving electromagnetism hydrodynamics. We propose model based on physics-informed neural networks (PINNs) to improve computational efficiency regarding classical approach. are trained generate sufficient data construct deep operator network (DeepONet). performance of PINN, in terms accuracy, analyzed applying it different...
With the accumulation of raw lightning data in various fields, it's more important to automatically analyze large amounts natural data. In recent years, neural network has made great process pattern recognition, which makes it possible efficiently classify this study, a convolutional is proposed for classification waveform Low Frequency/ Very Frequency (LF/VLF) bands. The trained by six-year (2012-2017) set including over 50,000 waveforms. By using series one-dimensional convolutions layer...
Abstract The physical mechanism of leader formation and development is not well understood. In this study, we present experimental simulation results obtained with a 10 m long air gap discharge. A outdoor discharge experiment carried out to obtain the current, voltage, optical image during process. Four different impulse voltages were applied rod‐plane gap. measured current used as an input for plasma model, then temperature electric field could be calculated. show that streamer stem dark...
With the decline of fossil energy and deterioration global environment, companies are transforming from traditional system to integrated (IES). IES is a platform containing multiple supply can realize conversion between different sources. Although highly competitive, its economic benefits remain be investigated. In this study, an evaluation model developed considering internal relationship system, major costs sources revenue. This paper presents set scientific complete indexes, core...
With the application of lightning data in meteorology, electric power as well public safety, massive is accumulated. Meanwhile, a synthesized and complicated problem arose, which is, how to automatically obtain valuable information from data. The deep learning method provides an effective way classify event type discharges raw In this paper, we propose five-category classification model for waveforms VLF/LF bands. based on convolutional neural network, trained tested by six year (2012-2017)...
In this study, we report the precious observations of a thunderstorm with frequent negative Narrow bipolar events (NBEs) and examine temporal spatial relationship between seven blue discharges (including jets, starters pixels) observed by ISUAL payload onboard FORMOSAT-2 satellite. Our analysis shows that nearly all are associated NBEs within 1ms, indicating is most probably initial event could provide convenient approach to detect discharges. work will enrich recognition about intra-cloud...
Lower ionosphere is difficult to probe for conventional measurements, as its altitude range too low the satellite and high atmospheric balloons. Recently, an alternative method study lower using lightning signatures. In this work，we investigate daytime fluctuations of by analyzing time domain VLF/LF waveform emitted Narrow Bipolar Events (NBEs), which were recorded eight-station location network called Jianghuai-Area Sferic Array (JASA) a systemic real-time monitoring ionosphere. JASA has...
The number of charging stations for electric vehicles is gradually increasing. In order to meet the demands vehicle owners, some have become large users with power demand and participated in market bidding. Since bidding capacity enough influence price, would be inefficient if not coordinated. To coordinate multiple stations, this paper, a systematic framework day-ahead joint considering non-profit third-party operator presented, models are established respectively, cost settlement method...
Computing inductance parameters of electromagnetic devices for different coil positions and angles is a practical problem commonly encountered. Typical applications include finding the mutual inductances relative coils wireless power transfer system. Due to lot sample need be swept, it really time-consuming process obtaining all values each position. In this paper, firstly new efficient dual formulations are proposed where global finite element matrices totally same thus assembly needs...
Integrated energy services (IESs) contain a variety of service contents and forms, resulting in that economic evaluation IESs can't rely on single financial data. Therefore, it is necessary to establish an method suitable for IESs. In this study, combined with the operating characteristics profit models typical IESs, set core index systems was built based perspectives flow, information flow cash flow. The combination weight determined by network analysis anti-entropy power method. By...
Due to the unbalanced distribution of energy resources in China, main solution is transmit electricity from west east. In addition, western part China has a higher altitude, and highest altitude can reach more than 5000m. Therefore, it necessary fully understand corona characteristics line fittings high-altitude areas when constructing lines region. this paper, ultraviolet imaging detection technology used carry out characteristic test for different sizes types at altitudes. The AC inception...