A5016414668- Rock Mechanics and Modeling
- Hydrocarbon exploration and reservoir analysis
- Particle Accelerators and Free-Electron Lasers
- Hydraulic Fracturing and Reservoir Analysis
- Drilling and Well Engineering
- Photonic Crystal and Fiber Optics
- Enhanced Oil Recovery Techniques
- Particle accelerators and beam dynamics
- Laser-Matter Interactions and Applications
- Advanced Fiber Laser Technologies
- Photocathodes and Microchannel Plates
- Geophysical Methods and Applications
- Landslides and related hazards
- Seismic Imaging and Inversion Techniques
- Superconducting Materials and Applications
- Particle Detector Development and Performance
- Laser Design and Applications
- Methane Hydrates and Related Phenomena
- Welding Techniques and Residual Stresses
- Groundwater flow and contamination studies
- Advanced Measurement and Detection Methods
- Tunneling and Rock Mechanics
- Concrete and Cement Materials Research
- Coal Properties and Utilization
- Solid State Laser Technologies
Wuhan University
2020-2024
China University of Geosciences
2023-2024
University of Science and Technology of China
2024
Anhui University of Science and Technology
2023-2024
China XD Group (China)
2023
Shanghai Zhangjiang Laboratory
2023
Wuhan Donghu University
2022
Brookhaven National Laboratory
2017-2021
Chongqing University
2015-2020
Shenzhen Polytechnic
2018
High-power, high-brightness electron beams are of interest for many applications, especially as drivers free lasers and energy recovery linac light sources. For these particular photoemission injectors used in most cases, the initial beam brightness from injector sets a limit on quality generated at end accelerator. At Cornell University, we have built such high-power using DC gun followed by superconducting accelerating module. Recent results will be presented demonstrating record setting...
Cracking behaviors of rocks significantly affect the safety and stability explorations underground space deep resources. To understand deeply microscopic cracking process mechanical property rocks, X-ray micro-computed tomography (X-μCT) is applied to capture rock microstructures. The digital color difference UNet (DCD-UNet)-based learning algorithm with 3D reconstruction proposed reconstruct multiphase heterogeneity microstructure models rocks. properties are studied based on...
We present a detailed study of the six-dimensional phase space electron beam produced by Cornell Energy Recovery Linac Photoinjector, high-brightness, high repetition rate (1.3 GHz) DC photoemission source designed to drive hard x-ray energy recovery linac (ERL). A complete simulation model injector has been constructed, verified measurement, and optimized. Both horizontal vertical 2D transverse spaces, as well time-resolved (sliced) space, were simulated directly measured at end for 19 77...
The Text-to-Image (T2I) diffusion model is one of the most popular models in world. However, serving at entire image level faces several problems, especially when there are multiple candidate resolutions. First, based system prevents requests with different resolutions from batching together. On other hand, hybrid also indicate diverse locality features, which makes it hard to apply same cache policy all them. To this end, we propose PATCHEDSERVE, A Patch Management Framework for...
Cooling of beams gold ions using electron bunches accelerated with radio-frequency systems was recently experimentally demonstrated in the Relativistic Heavy Ion Collider at Brookhaven National Laboratory. Such an approach is new and opens possibility this technique higher energies than possible electrostatic acceleration beams. The challenges include generation suitable for cooling, delivery required quality to cooling sections without degradation beam angular divergence energy spread,...
We report on the direct amplification of picosecond pulses to megawatt peak power and 150 W average using a Yb-doped rod-type fiber master oscillator amplifier. 3 ps at 50 MHz repetition rate are amplified in 55 cm amplifier produce linearly polarized with μJ pulse energy 1 MW power. These results extend amplifiers 100 regime for first time. Frequency doubling yields 70 green power, 1.4 energy, 500 kW
Summary An integrated approach of improved pseudo color image enhancement (IPCE) method and three‐dimensional (3D) reconstruction technology is proposed. The evolution characteristics two‐dimensional (2D) 3D spatial cracks in X‐ray computed tomography (CT) images sandstones subjected to triaxial compression with confining pressure 10, 20, 30 MPa are investigated. equations crack width, length, dip angle established based on the proposed digital damage ratio. Based images, point cloud maps...
We report on the generation of 180 W average green power from a frequency-doubled picosecond rod fiber amplifier. In an Yb-doped master-oscillator-power-amplifier system, 2.3-ps 704 MHz pulses are first amplified in small-core fibers and then large-mode-area to produce 270 infrared with high polarization extinction ratio diffraction-limited beam quality. By carrying out frequency doubling lithium triborate (LBO) crystal, is generated. To best our knowledge, this highest achieved fiber-based...
The cracking behaviors of rocks significantly affect their mechanical properties. In this paper, a digital analysis approach with X-ray Computed Tomography (CT) imagery is developed to investigate the and rocks. damage ratio, integrity, porosity subjected triaxial compression are firstly defined based on CT image pixel coordinate system. Then, evolution process two-dimensional (2D) three-dimensional (3D) cracks studied via 2D images reconstructed 3D fracture models, respectively. Finally,...
Summary X‐ray computed tomography (CT) imaging and digital image correlation techniques are applied to study spatial cracking behaviors of sandstone under uniaxial compression, in which the angle between precracks is 45°, 90°, 135° crack depth 7.5 mm 10 mm, respectively. Layered anisotropy damages evolution quantitatively analyzed by defined layered index damage ratio, Three cases with different array evidence effects on propagation. Results show that failure process samples first controlled...
A fiber amplifier that generates nearly transform-limited sub-picosecond pulses and greater than 100 W average power at 1.3-GHz repetition rate is described. Modest stretching of the seed allows to be operated in linear regime. The amplified dechirped exhibit excellent beam quality, can frequency-doubled produce green 65 power. Detailed characterization performance presented.
In this paper, we propose a new hollow-core photonic crystal fiber, which can be available for gas sensor. addition, properties of the fiber are analyzed at wavelength C 2 H and NH 3 absorption peak 1530nm 1967nm, respectively. For both wavelengths, relative sensitivity coefficients higher than 0.95, makes sense in sensing. We also get relationship between coefficient radius core, as well effective refractive index mode field.
Abstract Heterogeneity representations of rocks can bring out large errors due to inaccurate partitions different phases. This study aims deeply characterize the microscopic heterogeneity in represented by phases and their effects on damage properties sandstone. X‐ray μ‐CT imaging with low‐high resolution is applied capture microstructures information. Digital analysis statistical models employed accurately heterogeneity. The are analyzed using numerical simulations coupling multiple point...