A5065057751- Geophysical Methods and Applications
- Geophysical and Geoelectrical Methods
- Non-Destructive Testing Techniques
- Seismic Waves and Analysis
- Magnetic Field Sensors Techniques
- Advanced Sensor and Control Systems
- Electromagnetic Launch and Propulsion Technology
- Smart Grid and Power Systems
- Seismic Imaging and Inversion Techniques
- Industrial Technology and Control Systems
- Sensor Technology and Measurement Systems
- Video Surveillance and Tracking Methods
- Injection Molding Process and Properties
- High-Voltage Power Transmission Systems
- Pulsed Power Technology Applications
- Ultrasonics and Acoustic Wave Propagation
- Lightning and Electromagnetic Phenomena
- Advanced Algorithms and Applications
- Welding Techniques and Residual Stresses
- Power Systems and Renewable Energy
- Geoscience and Mining Technology
- Human-Animal Interaction Studies
- UAV Applications and Optimization
- Gyrotron and Vacuum Electronics Research
- Advanced DC-DC Converters
Chongqing University
2015-2024
Beihang University
2021
Electric Power Research Institute
2019
Central South University
2012-2018
State Key Laboratory of High Performance Complex Manufacturing
2012
Guizhou Electric Power Design and Research Institute
2012
Xiaomi (China)
2009
Chongqing University of Technology
2007
Shaanxi Research Association for Women and Family
2005
University of Georgia
2002
Boosting performance of the offline trained siamese trackers is getting harder nowadays since fixed information template cropped from first frame has been almost thoroughly mined, but they are poorly capable resisting target appearance changes. Existing with updating mechanisms rely on time-consuming numerical optimization and complex hand-designed strategies to achieve competitive performance, hindering them real-time tracking practical applications. In this paper, we propose a novel...
The Visual Object Tracking challenge VOT2021 is the ninth annual tracker benchmarking activity organized by VOT initiative. Results of 71 trackers are presented; many state-of-the-art published at major computer vision conferences or in journals recent years. was composed four sub-challenges focusing on different tracking domains: (i) VOT-ST2021 focused short-term RGB, (ii) VOT-RT2021 "real-time" (iii) VOT-LT2021 long-term tracking, namely coping with target disappearance and reappearance...
Optimizing the grounding grid configuration is an effective approach to improve performance of grid. On other hand, necessary for some defect diagnosis method detect faults existing in conductors. This paper employs transient electromagnetic (TEM) draw a substation The surface magnetic field recorded by receiver coils above Based on regular distribution characteristics field, conductor accurately located from curve intensity. complete process detection described detail. After fast inversion...
Transient electromagnetic (TEM) soundings are being increasingly used in engineering applications of environmental and regional surveys shallow metal detection. Efficient real time the processing observed TEM data is trend for geophysical prospecting detection instrument modern times. This letter presents a fast resistivity imaging method using artificial neural networks. The input-output mapping relations networks established based on response characteristics under different transmitter...
The small-loop transient electromagnetic (TEM) method has great application prospects in shallow surface geophysical exploration. However, the theoretical research on forward and inversion of this is obviously lagging behind, which seriously affects effect practical engineering. For oscillation problem TEM response calculated by using theory conventional methods, dipole integral superposition was proposed to solve article. transmitter source divided into an infinite number electric dipoles,...
The transient electromagnetic (TEM) method is a widely used nonintrusive geophysical for ground exploration. Due to the mutual inductance between transmitter (TX) coil and receiver (RX) coil, primary field generated by emission current reduces accuracy of near-surface detection. Because feature signal [Formula: see text] carrying target information mainly distributed in early secondary-field response, expanded detection will reduce investigation capability TEM device due following three...
ABSTRACT Distributed parameters of the receiver coils greatly affect transient electromagnetic signals over short time periods, causing a delay in signal's effective sampling and loss shallow exploration information. This paper investigates influence process on apparent resistivity calculation analyses relations between error coil design. We find that, under same area, different radii lead to levels impact estimation resistivity. An optimization model is proposed determine optimal size that...
A bipolar pulse current source is proposed for a highly inductive load. The exploits noninductive capacitor to store or release the energy back and from load during switching on off of power inverter. boost module designed at dc side inverter supplement required gap so that edge steepness can be improved. elements are configured based analysis impact inductor current. stability guaranteed by multiple driving pulses generated closed-loop control switch, regardless changes initial width...
Transient electromagnetic (TEM) method is widely used in regional mineral resources surveys, environmental engineering geological surveys and shallow surface geophysical exploration, so on. However, interpretation inversion of TEM data a complicated process. The traditional algorithm employs the "smoke ring" fast imaging method, which can only reflect approximate morphology stratigraphic model, accuracy low. Therefore, this cannot meet requirements high-precision inversion. In article, we...
The pulsed eddy current (PEC) inspection is considered a versatile non-destructive evaluation technique, and it widely used in metal thickness quantifications for structural health monitoring target recognition. However, non-ferromagnetic conductors covered with non-uniform thick insulating layers, there are still deficiencies the schemes. main purpose of this study to find an effective feature, measure wall thinning under large lift-off variations, further expand application PEC technology....
The grounding grid is critical to the safety and stability of a power system. Corrosive cracking conductor main cause deterioration performance. Existing fault diagnosis methods for grids are limited by number distribution leads, some them cannot be used online detection. This paper proposes detection method based on magnetic source excitation. measuring device consists four coils, two horizontal excitation vertical receiving coils. secondary field signal extracted from primary background...
Abstract In this article, a novel circuit topology of near rectangular current pulse generation suitable for the transient electromagnetic (TEM) applications is proposed. Satisfactory TEM applications, in general, rely upon transmitter acting as excitation source to produce high-quality primary magnetic field. This requires that generated be short turn-off delay time, with highly linear falling edge, and fast rising edge. The bipolar pulses very challenging high-current high-power...
The transient electromagnetic (TEM) method is widely used in shallow surface engineering geological surveys due to its advantages such as light weight, high efficiency, and strong resolution. However, interpretation inversion of TEM data a complicated process. traditional algorithm employs the "smoke ring" fast imaging method, which can only reflect approximate morphology stratigraphic model, accuracy low. Therefore, this cannot meet requirements high-precision inversion. In article, we...
Summary form only given. Faults in the grounding grid are hidden danger to safety of power system and cause significant economic loss every year. This paper presents a new means locate faults grids using transient electromagnetic imaging method. The method compares distribution characteristics equivalent resistivity underground covered by for no fault case those with break points. We describe why how proposed can be used point diagnosis grids. Simulation was performed Ansoft FEM package,...
Transient electromagnetic (TEM) method is a reliable means of non‐destructive testing for fault diagnosis grounding grid in substation. In view the small transmitter loop TEM system and many measuring points survey lines detection This study presents fast solution to apparent resistivity imaging using artificial neural networks. The input ‐output mapping relation network established based on response characteristics grid. built could map recorded data quickly obtain image. proposed offers...
This article presents a novel design of bipolar current-pulsed power supply (BCPPS) for shallow electromagnetic detection. Problems acquiring current pulses with low oscillation and energy cost are analyzed in detail relevant solutions given. An improved topology based on constant-voltage clamping circuit is proposed to satisfy the demands supplying highly inductive load. The relationship between main steady-state parameters BCPPS provided shape can be adjusted flexibly by changing duty...
ABSTRACT The transient electromagnetic method has a wide range of depth exploration in the ground. transient‐electromagnetic‐method‐based shallow sounding is becoming popular engineering geophysics such as grounding grid measurement, pipeline detection, and mine exploration. It useful for to raise transmitting frequency, improve spectral resolution, enhance power withstanding all kinds near‐surface noise. Therefore, well‐designed transmitter current waveform should not only induce more...
In this paper, a novel AC magnetic transmitter current source circuit is proposed for application of frequency domain electromagnetic method (FEM) prospecting. The capable generating high and constant amplitude currents, which are key technical problems FEM. It suitable very wide frequencies. main the consists rising-edge enhancing unit, control voltage clamping unit. Large applied during rising edge falling alternating square to obtain linearity source. On flat stage, unit provides energy...