A5101738990- Force Microscopy Techniques and Applications
- Mechanical and Optical Resonators
- Near-Field Optical Microscopy
- Integrated Circuits and Semiconductor Failure Analysis
- Piezoelectric Actuators and Control
- Power Systems and Renewable Energy
- Smart Grid and Power Systems
- Power Systems and Technologies
- Advanced MEMS and NEMS Technologies
- Electric Motor Design and Analysis
- High-Voltage Power Transmission Systems
- Geophysics and Sensor Technology
- Image Processing Techniques and Applications
- Advanced Surface Polishing Techniques
- Optimal Power Flow Distribution
- Energy Load and Power Forecasting
- Advanced Frequency and Time Standards
- Surface and Thin Film Phenomena
- Astronomical Observations and Instrumentation
- Refrigeration and Air Conditioning Technologies
- Photoacoustic and Ultrasonic Imaging
- Sparse and Compressive Sensing Techniques
- Space Exploration and Technology
- Photovoltaic System Optimization Techniques
- Analytical Chemistry and Sensors
Quanzhou Normal University
2023-2024
Beihang University
2014-2024
Sun Yat-sen University
2023
Nanchang University
2022
Central South University
2020
Southern University of Science and Technology
2020
Beijing University of Civil Engineering and Architecture
2007-2019
Ministry of Education of the People's Republic of China
2016
North China Electric Power University
2015
Beijing Normal University
2014
With grid-connected photovoltaic system increasing, distributed generations will influence the power quality. The forecast of (e.g. system) be helpful to planning, operations and management system. Basing on Grey GM (l, l) model stochastic processes Markov model, deviation results grey was used as transfer probability matrix forecast. In order increase reliability, calculation result modified limited in a range which consisted interval probability. application grey-Markov have greatly...
Recent interest in high-precision positioning stages with large travel ranges has sparked renewed attention to the development of voice coil motors (VCMs). Due their output force, VCMs can actuate more complicated flexure structures, eliminate rail friction, and improve speed. The VCM structure is both compact flexible; hence, it convenient design for a variety stage structures. Furthermore, combined other actuators are able achieve high precision. In this paper, we summarize principles...
A grid-connected photovoltaic system has the characteristics of time-varying and random. Markov chain model power generation forecast was built based on decision theory according to 6 kW PV operating data. The initial formation probability matrix transition for have been obtained. After considering weather conditions, solar radiation other specific factors, if statistical sample is large enough, theoretical calculations are very close actual results. results show feasible, correct effective....
Abstract This study constructs and validates a heat transfer model of PFHE applied in data center cabinet cooling systems, using water R134a as working fluids. By comparing with experimental data, the specific impacts two fluids on exchanger performance are thoroughly analyzed. Findings indicate that compared to water, demonstrates superior uniformity outlet air temperature its capacity is 1.23 2.27 times water. However, pressure drop two-phase exchange generally higher than during...
Background: Recent overweight and obesity prevalence data are lacking for China. Methods: Data were from provincially representative surveys conducted in 2013 2018 Hunan Province, Overweight defined according to the Chinese standard. Complex sampling weights considered statistical analyses. 95% confidence interval (95% CI) of rate was calculated. Results: The overall between significantly increased 20.81% CI: 17.68-23.95) 26.97% 23.48-30.45) 4.09% 3.21-4.96) 7.13% 5.10-9.15) Province China,...
Atomic force microscopes are a key tool in nanotechnology that overcome the limitations of optical and provide imaging capabilities with nanoscale resolution. We have developed an atomic microscope uses inexpensive quartz tuning fork as micro cantilever. Because its ease operation open structure, it can be easily customized by students. Due to low costs, is possible every student course has access one setup, allowing all students obtain deep insights into understand principles microscopy.
The space-based gravitational wave detection mission, TianQin, requires high-level synchronization between independent clocks of all spacecrafts to extract the signals. It is necessary measure inter-spacecraft relative clock jitter based on laser phase-sideband transfer. main challenge tracking and locking sideband beatnote signals with low signal-to-noise ratio frequency variation. In this paper, a systematic scheme readout reported. requirement transfer link for TianQin time-delay...
The periodic impact force induced by tip-sample contact in a tapping mode atomic microscope (AFM) gives rise to the non-harmonic response of micro-cantilever. These signals contain full characteristics interaction. A complete theoretical model describing dynamical behaviour tip–sample system was developed this paper. An analytic formula introduced describe relationship between time-varying and tip motion. analysis numerical results both show that can be reconstructed recording This allows...
A quartz tuning fork (QTF) has been widely used as a force sensor of the frequency modulation atomic microscope due to its ultrahigh stiffness, high quality factor and self-sensing nature. However, bulky structure exposed surface electrode arrangement, application is limited, especially in liquid imaging situ biological samples, ionic liquids, electrochemical reaction, etc. Although complication can be resolved by coating insulating materials on QTF then immersing whole into liquid, it would...
The tip motion of the dynamic atomic force microscope in liquids shows complex transient behaviors when using a low stiffness cantilever. second flexural mode cantilever is momentarily excited. Multiple impacts between and sample might occur one oscillation cycle. However, commonly used Fourier transform method cannot provide time-related information about these features. To overcome this limitation, we apply wavelet to perform time-frequency analysis liquids. momentary excitation phenomenon...