A5100706339- High voltage insulation and dielectric phenomena
- Electrostatic Discharge in Electronics
- Power Transformer Diagnostics and Insulation
- Lightning and Electromagnetic Phenomena
- Aerosol Filtration and Electrostatic Precipitation
- Physics of Superconductivity and Magnetism
- Medical Imaging Techniques and Applications
- Dielectric materials and actuators
- Radiomics and Machine Learning in Medical Imaging
- Network Security and Intrusion Detection
- Advanced Malware Detection Techniques
- Electromagnetic Compatibility and Noise Suppression
- Nuclear Physics and Applications
- Superconducting Materials and Applications
- Video Surveillance and Tracking Methods
- Thermal Analysis in Power Transmission
- Advanced Optical Imaging Technologies
- Machine Fault Diagnosis Techniques
- Engineering Applied Research
- Speech and Audio Processing
- Cellular Mechanics and Interactions
- Quasicrystal Structures and Properties
- Face and Expression Recognition
- Elevator Systems and Control
- Magnetic Field Sensors Techniques
Jiangsu Second Normal University
2025
Sichuan University
2015-2024
University of Warwick
2024
Chengdu University
2023-2024
Chengdu University of Information Technology
2009-2020
Beijing Normal University
2016
Southwest Jiaotong University
2007-2013
University of Bologna
2013
Chinese Academy of Sciences
2013
Nanjing University of Science and Technology
2011
This paper focuses on the influence of repetitive square wave voltage rise time partial discharge pulse characteristics in ultra-high frequency range. Paerial Discharge (PD) tests single-point contact crossed pairs were carried out using voltages with a wide range times, from 200 ns to 400 μs, including also 50 Hz sinusoidal waveforms. Experimental results show that has significant magnitude and spectrum PD pulses. Voltages shorter times generate larger pulses predominance high components...
Abstract The observation of superconductivity in infinite‐layer nickelates has attracted significant attention due to its potential as a new platform for exploring high‐ T c superconductivity. However, thus far, only been observed epitaxial thin films, which limits the manipulation capabilities and modulation methods compared two‐dimensional exfoliated materials. Given exceptionally giant strain tunability stacking capability freestanding membranes, separating superconducting from as‐grown...
In the rapidly evolving field of healthcare, Artificial Intelligence (AI) is increasingly driving promotion transformation traditional healthcare and improving medical diagnostic decisions. The overall goal to uncover emerging trends potential future paths AI in by applying text mining collect scientific papers patent information. This study, using advanced multiple deep learning algorithms, utilized Web Science for (1587) Derwent innovations index patents (1314) from 2018 2022 study...
This paper reviews results of partial discharge measurements and accelerated life tests performed on models random form wound insulation systems subjected to impulse voltage waveforms. The goal is highlight how the features supply affect activity this, eventually, reflects endurance system. most salient are that, for both types systems, short rise times trigger PD large magnitude, which able erode system faster than discharges incepted using waveforms with longer times. In particular,...
Dealing with electrical rotating machines fed by voltage converters, understanding the effect of impulsive parameters on partial discharge features is great importance to select appropriate perform inception measurements. Similarly, dependence insulation endurance might help develop qualification tests providing more accurate evaluation performance. The duty cycle characteristics and inverter-fed motor were investigated through a large number performed single-contact crossed enameled wires...
We have designed and built a novel high-temperature superconducting (HTS) flux pump device to charge second-generation (2G) HTS double pancake coil (DPC). This generates dc-biased ac travelling wave on sections of 2G coated conductor (superconducting stator), which pumps into the closed loop formed by DPC stator. In this paper, we discuss importance field, wave, direction in process, how control magnetization an with above factors. found that pure can only transport net presence dc-bias...
Partial discharge (PD) measurements under repetitive impulse voltages are critical for the qualification of inverter-fed motor insulation systems. Severe electromagnetic interference due to high frequency switching from power electronic devices can cause traditional PD detection techniques sinusoidal voltage unfeasible. This article presents design an Archimedes spiral antenna that work effectively fast rise time voltages. The structure is optimized by a media superstrate with dielectric...
To obtain high-quality positron emission tomography (PET) images while minimizing radiation exposure, numerous methods have been dedicated to acquiring standard-count PET (SPET) from low-count (LPET). However, current failed take full advantage of the different emphasized information multiple domains, i.e., sinogram, image, and frequency resulting in loss crucial details. Meanwhile, they overlook unique inner-structure sinograms, thereby failing fully capture its structural characteristics...
To address the challenges of significant detail loss in Neural Radiance Fields (NeRF) under sparse-view input conditions, this paper proposes DASNeRF framework. aims to generate high-detail novel views from a limited number viewpoints. limitations few-shot NeRF, including insufficient depth information and loss, introduces accurate priors employs constraint strategy combining relative ordering fidelity regularization structural consistency regularization. These methods ensure reconstruction...
The linear-motor type flux pump is a wireless DC power source for high-temperature superconducting coils, which compact in size, efficient energy use, fast output control, etc. It consists of three major parts: windings, phase windings and iron circuit, generates DC-bias AC travelling wave its airgap. In theory, there are controllable parameters such as field, amplitude the wave, field frequency (travelling speed). By changing those parameters, we change applied fields current into coils....
Adhesive interface stiffness is capable of modulating cellular behavior and gene expression, yet the underlying mechanobiological mechanisms remain unclear. In this study, we investigated effects on expression pathways by hydrogels with divergent stiffness. Our results reveal that adhesive affects cytoplasmic mechanotranduction as well nuclear mechanics, ultimately regulating subcellular localization HDAC3. Further investigation unfolds HDAC3 directly global acetylation levels within...
Ultrahigh-frequency (UHF) antenna sensors are used extensively for partial discharge (PD) detection to diagnose insulation systems subjected high dV/dt voltage waveforms, e.g., inverter-fed motors. Through frequency spectrum analysis and appropriate high-pass filtering, it is possible remove the source interference reliably detect PD activity; however, still unclear whether content of signals gathered representative or sample under test, acting as a transmitting antenna. In this paper,...
A novel high-efficiency resonant light emitting diode (LED) backlight driver with passive current balancing and dimming is proposed analyzed in this paper. The LED achieves uniform brightness of each string by the charge balance capacitor, which benefits from high efficiency. By controlling output one string, currents other strings can be controlled via capacitors, makes its control simple. uses only active switch, decreases circuit volume simplifies control. Furthermore, a wide load range...
Endurance tests under repetitive impulse voltages should be performed on inverter-fed motor insulation to evaluate its performance according the technical specification (TS) released by International Electrical Commission (IEC), i.e. IEC TS 60034-18-42. To simplify testing procedures in application, allows life sinusoidal waveform, as it assumes that and impulsive will provide comparable results if they have same peak-to-peak voltage frequency. However, we found rise time can significant...
The improvements in signal-to-noise ratio (SNR) are indispensable to obtain the desired output signal of partial discharge (PD) under square wave pulsewidth modulation (PWM) voltage. In this article, effect complex PWM voltage parameters (rise time, fall frequency, duty cycle) on SNR PD tests is investigated. results revealed that sensor's high-frequency gain should be increased improve faster switching. impulses more likely submerged residual interference can improved by only detecting at...
Abstract Variation in air pressure severely affects the insulation of electric vehicle (EV) motors, hence weakening reliability EVs for safe operation. Nomex‐polyimide‐Nomex, a typical material EV was used to investigate motor performance under different pressures. The results show that partial discharge inception voltage is significantly reduced motors operated at lower pressures, and probability (PD) occurrence increased. macroscopic reveal active area PD expands low pressure, while...
Polyimide (PI) film is an important type of insulating material used in inverter-fed motors. Partial discharge (PD) under a sequence high-frequency square impulses one the key factors that lead to premature failures insulation systems In order explore damage mechanism PI caused by discharge, aging system surface bipolar continuous impulse voltage (BCSIV) designed based on ASTM 2275 01 standard and electrical tests samples are performed above partial inception (PDIV). The chemical bonds...
Malware which in general are programs that developed for malicious purpose can be used to change or destroy data, run destructive intrusive programs, and steal personal other sensitive information. becoming more complex by keeping evolving with technology development. Newly emerged malware has enhanced the ability of survival anti-detection, have become a serious safety problem corporations, government agencies, individuals. Most previous researches about detection using machine learning...