A5100448998- Multilevel Inverters and Converters
- Advanced DC-DC Converters
- Microgrid Control and Optimization
- Luminescence Properties of Advanced Materials
- Magnetic Field Sensors Techniques
- Nonlinear Optical Materials Studies
- Radio Frequency Integrated Circuit Design
- HVDC Systems and Fault Protection
- Nanoplatforms for cancer theranostics
- Luminescence and Fluorescent Materials
- Advanced Surface Polishing Techniques
- Engineering Diagnostics and Reliability
- Radiation Detection and Scintillator Technologies
- Electromagnetic Compatibility and Noise Suppression
- Fullerene Chemistry and Applications
- Evaluation and Optimization Models
- Power Quality and Harmonics
- Power Transformer Diagnostics and Insulation
- Ocular and Laser Science Research
- Evolutionary Algorithms and Applications
- Advancements in PLL and VCO Technologies
- PAPR reduction in OFDM
- Surface Roughness and Optical Measurements
- Silicon Carbide Semiconductor Technologies
- High-Voltage Power Transmission Systems
Harbin Institute of Technology
1996-2024
China Southern Power Grid (China)
2015-2023
Liaoning Technical University
2022
Jianghan University
2021
Electric Power Research Institute
2015
Chongqing University
2013
Infineon Technologies (United Kingdom)
2010
Huazhong University of Science and Technology
2008
Upconversion nanoparticles (UCNPs), typically converting near-infrared (NIR) light into visible luminescence, are promising for bioimaging applications. However, optical multiplexed in vivo upconversion experiments have long been hampered by the exceptional rarity of available luminescence bands UCNPs that can penetrate deep tissues. Herein, we describe an approach to accomplish imaging through time-domain discrimination tissue-penetrating NIR at 808 nm (from thulium ions) with a multitude...
Abstract Luminescence nanothermometry is promising for noninvasive probing of temperature in biological microenvironment at nanometric spatial resolution. Yet, wavelength‐ and temperature‐dependent absorption scattering tissues distort measured spectral profile, rendering conventional luminescence nanothermometers (ratiometric, intensity, band shape, or shift) problematic vivo determination. Here, a class lanthanide‐based nanothermometers, which are able to provide precise reliable readouts...
Abstract The Space Plasma Environment Research Facility (SPERF) for ground simulation of the space plasma environment is a key component Simulation Infrastructure (SESRI), major national science and technology infrastructure fundamental research. It designed to investigate outstanding issues in environment, such as energetic particle acceleration, transport, interaction with electromagnetic waves, well magnetic reconnection processes, magnetospheric plasmas. Tail-Research EXperiment (TREX)...
To improve the normal operation power quality, dc side harmonic reduction circuit (HRC) has been extended to multipulse rectifiers (MPRs) based on five-phase bridge rectifier. The quality under fault conditions is also an important aspect that affects overall reliability of rectifier system. This article focused open-phase research passive MPRs with autoconnected phase-shifting transformer. parallel-connected 40-pulse selected as main circuit. Under primary or secondary faults, modes and HRC...
A novel static compensator (STATCOM) is proposed in this paper. The new STATCOM constructed by a hybrid topology cascading neutral-point-clamped (NPC) inverter and several identical H-bridge inverters. With the consisting of same DC bus voltage but different structure modules, realization multilevel converter using approach that involves higher devices fast switch operating synergism possible. Accordingly, modulation method for proposed. By type STATCOM, bulky weighty transformers can be...
A hysteresis space vector pulse width modulation (SVPWM) reconfigurable fault-tolerant method for single-phase voltage source multi-level inverter with current tracking is proposed. Firstly, the influence of single switch open circuit fault and double switches on analyzed, this basis, equivalent replacement obtained by using topology reconstruction inverter, redundant vectors overlapping positions are preferred replacement. If there no coincident non-fault vectors, other closest position...
The interphase reactor (IPR) is one of the most important components passive harmonic reduction circuit (HRC), and optimum turns ratio design IPR great significance to ensure effect HRC. In combination with pulse number multiplication methods, configuration multipulse rectifiers (MPRs) single/dual/triple-passive HRCs are constructed, respectively. general method for IPRs proposed, which contains realizable combinations HRCs. relationship between phase bridge rectifier in main established,...
This paper proposes a decoupled six degrees of freedom (DOF) displacement measurement methodology, which is accomplished by utilizing pairs permanent magnets and Hall sensors. Firstly, the coordinate transformation was mathematically derived, represented relationships between main system motion each body With aid an ellipsoid function least squares method, only output voltages sensors were required to decouple six-DOF inclination platform with high accuracy. Finally, experimental...
This paper presents the methane detection at low concentration based on 2f harmonic signal to achieve highly sensitive monitoring. Since is characteristic gas in power transformer oil once a thermal fault temperature (
Abstract The article describes a method for dynamic identification of AC and DC hybrid power network parameters. inaccuracy the parameters electromechanical transient simulation model system has caused obvious difference between results actual measurement, which restricted its online application. Over years, parameter technology based on field test made great progress, but it is far from satisfactory accurate. There still long research journey requirements performance. way to solve problem....
Abstract With the development of high voltage grid, it is trend future grid to unlock electromagnetic loop network and carry out layered partitioned operation. Subarea operation power can effectively alleviate complex structure current serious problem short-circuit exceeding standard. A new partitioning method based on Dijkstra algorithm proposed. Firstly, according knowledge graph theory, transformed into a topology graph, impedance stations lines in corresponds nodes weights graph. Then,...
Optical power limiting of Fullerenes/PMMA has been studied based on a time-resolved single-beam technique. A nanosecond/picosecond Nd:YAG laser system with pulse width 8-ns, repetition frequency 10 Hz and wavelength 532-nm was employed. Temporal profile beam is Gaussian profile. When the peak density incident P<SUB>in</SUB> 180 WM/cm<SUP>2</SUP>, transmitted pulses versus time are measured using 4402 Boxcar 0.4 ns resolution. The experimental results have shown that, at high irradiance...
It is of great significance for Engineering colleges cultivating more professional talents with comprehensive ability to innovate in the social construction first line work our country realize strategic planning and goal solve sustainable development key technology problem faced by all.At first, this paper summarized current ways extend improve college students ability, pointed out importance combination traditional classroom teaching cultivation second practice way improving students'...
This paper presents a novel method for determining the harmonic emission responsibilities of utility and customer at point common coupling (PCC). The proposed approach is based on robust partial least squares regression (robust PLS), which estimates system impedance by utilizing signals voltage current measured synchronously PCC. Consequently are calculated. presented reduces or removes effect outlying data points. simulation practical engineering results indicate that valid feasible.
Thyristor Controlled Phase Shifting Transformer (TCPST) has gained popularity for its ability to regulate power flow. The electronic devices of TCPST have limited capability withstand short-circuit current, making it susceptible equipment damage caused by current shocks. To improve the operational safety TCPST, is necessary research suppressing currents in system where installed. This paper proposes a method systems containing based on controllable reactors. Firstly, selection strategy table...
At present, the food quality inspection industry has become an important foundation of national development strategy. Combined with China's current and testing work to implement status quo analysis, there are still problems in stage, need grasp actual situation based on factors affecting targeted solution ensure that importance for a strong.