A5101916104- Non-Destructive Testing Techniques
- Metallurgy and Material Forming
- Welding Techniques and Residual Stresses
- Adaptive optics and wavefront sensing
- Optical Systems and Laser Technology
- Metal Forming Simulation Techniques
- Advanced Sensor Technologies Research
- Nanowire Synthesis and Applications
- Advanced Photocatalysis Techniques
- High voltage insulation and dielectric phenomena
- Laser and Thermal Forming Techniques
- Optical measurement and interference techniques
- Hydrogen embrittlement and corrosion behaviors in metals
- Electronic Packaging and Soldering Technologies
- Powder Metallurgy Techniques and Materials
- Sensor Technology and Measurement Systems
- Thin-Film Transistor Technologies
- Aerosol Filtration and Electrostatic Precipitation
- Landslides and related hazards
- Magnetic Field Sensors Techniques
- Power Transformer Diagnostics and Insulation
- Organic Electronics and Photovoltaics
- Microstructure and mechanical properties
- Rock Mechanics and Modeling
- Optical Coherence Tomography Applications
China Electric Power Research Institute
2019-2024
Ministry of Education
2024
State Grid Corporation of China (China)
2024
Southwest University of Science and Technology
2024
Hefei Normal University
2017-2024
Fujian Agriculture and Forestry University
2024
University of Science and Technology of China
2010-2023
Sun Yat-sen University
2012-2021
Ningbo University of Technology
2014-2020
Changshu Institute of Technology
2020
In this study, aiming to characterize the dynamic polarization behavior of water molecules affected by hydrogen bonding with oil-paper insulation, we performed dielectric spectroscopy on insulation moisture contents 0.4-4.7% in terahertz band (0.3-3.3 THz). A relaxation-resonance integrated model considering water-participant bond (WHB) effects is established describe complex constant moisture. The theoretical good agreement experimental results. By analyzing relationship between parameters...
Pertechnetate (99TcO4–), a physiologically toxic radioactive anion, is of great concern due to its high mobility in environmental contamination remediation. Although the soluble oxyanion can be photoreduced sparingly TcO2·nH2O, effective removal from strongly acidic aqueous solution remains challenge. Here, we found that low-crystalline nitrogen-doped titanium oxide (N-TiO2, 0.6 g L–1) could effectively uptake perrhenate (ReO4–, 10 mg L–1, nonradioactive surrogate for TcO4–) with 50.8%...
This article proposes a self-temperature compensation method based on an analog multiplier, which reduces the circuit thermal drift by more than order of magnitude. An ac bridge eddy current sensor (ECS) is used as example to analyze in detail, and basic principle expounded. A high-precision ECS prototype manufactured tested. Results show that temperature coefficient decreased from 243 5 ppm/°C with this technique. self-compensation simple, effective, universal. Furthermore, technique has...
Image display technology has greatly developed over the past few decades, which make it possible to recapture high-quality images from medium, such as a liquid crystal display(LCD) screen or printed paper. The recaptured are not regarded separate image class in current research of digital forensics, while content may have been tempered. In this paper, two sets features based on noise and traces double JPEG compression proposed identify these images. Experimental results showed that our...
H-beams are currently the largest output section steel in world. Straightening is an important finishing step manufacturing process and directly determines ultimate straightness of beams. To analyse straightening process, a multiroller analytical model H-beam was established based on pure bending springback equation symmetrical curved beam. The purpose establishment to calculate exit residual deflection by inputting reduction rules ultimately get best rules. In model, concept plastic region...
Addressable nanowire field-emitter arrays (FEAs) show potential for application in vacuum microelectronic devices, and a focusing structure is essential modulation of the electron beam FEAs. However, because complicated device induced by structure, integration such very difficult. To address this issue, coaxis-gated ZnO FEA with an in-plane gate electrode proposed. The located same plane as cathode control gate, addressing function realized using via structure. FEAs were fabricated four-mask...
In this article, a kind of edge sensor based on the eddy current effect is proposed to realize accurate detection nano-level resolution in large temperature span. Compared with sensors different principles used optical telescope projects, has advantages being insensitive nontarget direction and immune nonferromagnetic medium. The dual-differential (DDES) greatly simplifies its installation reduces number support components for half by replacing complementary symmetrical method. By analyzing...
This article proposes a compensation method for precision sensors considering historical temperature states, which can significantly reduce the thermal drift of during rapid change process. A typical differential eddy current sensor (ECS) measuring displacement is used as an example to explain principle. By analyzing source ECS, it proved that time history will also affect output ECS. In this article, response characteristics sensing head ECS are obtained by lumped capacitance method, and...
Designers and artists often require reference images at authoring time. The emergence of computer technology has provided new conditions possibilities for artistic creation research. It also expanded the forms expression attracted many artists, designers experts to explore different directions collaborate with one another. In this paper, we present an efficient k-means-based method segment colors original picture analyze composition ratio color information calculate individual areas that are...
Understanding the oxidative mechanism of natural ester based insulating oils will benefit seeking antioxidants for their long time service in a transformer. The present studies introduced comprehensive investigation on soybean oil under accelerated aging conditions through 1H, 13C, DEPT-135 NMR, GPC, ICP, viscosity analysis, and chemical scavenger tests. It was found that superoxide radical, generated by copper wire activated oxygen, played significant role aging. Capturing radical...
Polyimide-based (PI) nanocomposites possess excellent electrical and thermal performance, widely used in inverter motor. In the paper using different particle sizes made polyimide/titania (PI/TiO2) nanocomposite films situ polymerization, including 20nm A series 50nm B series. The results shows that have a larger specific surface, combination of film matrix is closer without affecting imidization PI, there clear interface layer structure more stable. According to time corona-resistant Series...
In this study, a series of novel nanofibers based on gelatin (GA) loading with purple potato anthocyanin (PPA) and syringic acid (SA) were obtained by electrospinning technology. The effects SA mechanical property, thermal stability, antioxidant capacity, antimicrobial activity the GA/PPA systematically characterized. scanning electron microscopy observation result revealed that smooth surface can be observed nanofibers. incorporation increased viscosity electrospun solutions, it enhanced...
The Large Sky Area Multi-Object Spectroscopic Telescope (LAMOST) is currently the largest field of view in use internationally. Its primary mirror Mb spliced by 37 hexagonal segments with a diagonal length 1.1 meters. current cofocus maintenance strategy using Shack-Hartmann wavefront sensor (SHWFS) would interrupt observation mission, kind eddy edge high-precision and accuracy proposed this article to achieve closed-loop control. Through structural design, interaction matrix deduction...
The Large Sky Area Multi-Object Spectroscopic Telescope (LAMOST) is currently the largest field of view in use internationally. Its primary mirror Mb spliced by 37 hexagonal segments with a diagonal length 1.1 meters. current cofocus maintenance strategy using Shack-Hartmann wavefront sensor (SHWFS) would interrupt observation mission, kind eddy edge high-precision and accuracy proposed this article to achieve closed-loop control. Through structural design, interaction matrix deduction...
The current cofocus maintenance strategy of the primary mirror Large Sky Area Multi-Object Spectroscopic Telescope (Mb) using Shack–Hartmann Wavefront Sensor (SHWFS) interrupts observation mission. This study proposed an Eddy edge sensor with high precision and accuracy to achieve closed-loop control. Through structural design, interaction matrix deduction, installation parameter analysis, performance calibration, was validated for use in detecting segment attitudes. minimum system...