A5100741221- Solid State Laser Technologies
- Advanced Fiber Laser Technologies
- Laser Design and Applications
- 3D Shape Modeling and Analysis
- Photorefractive and Nonlinear Optics
- Nuclear reactor physics and engineering
- 3D Surveying and Cultural Heritage
- Photonic Crystal and Fiber Optics
- Remote Sensing and LiDAR Applications
- Reservoir Engineering and Simulation Methods
- Oil and Gas Production Techniques
- Advanced Numerical Methods in Computational Mathematics
- Cavitation Phenomena in Pumps
- Nuclear Materials and Properties
- Hydraulic Fracturing and Reservoir Analysis
- Hydraulic and Pneumatic Systems
- Seismic and Structural Analysis of Tall Buildings
- Geological Modeling and Analysis
- Laser-Matter Interactions and Applications
- Railway Engineering and Dynamics
- Extraction and Separation Processes
- Advanced Algorithms and Applications
- Seismic Performance and Analysis
- Geotechnical Engineering and Underground Structures
- Geoscience and Mining Technology
Chinese Academy of Geological Sciences
2022-2024
Institute of Applied Physics and Computational Mathematics
2023-2024
Shenzhen University
2024
Xi'an Jiaotong University
2023
Hohai University
2022
Anhui Medical University
2022
Jiangsu University
2017-2021
Shanghai Architectural Design & Research Institute
2019
Sinopec (China)
2006-2018
Harbin Institute of Technology
2012-2017
Learning 3D representation plays a critical role in masked autoencoder (MAE) based pre-training methods for point cloud, including single-modal and cross-modal MAE. Specifically, although MAE learn strong representations via the auxiliary of other modal knowledge, they often suffer from heavy computational burdens heavily rely on massive data pairs that are unavailable, which hinders their applications practice. Instead, with solely clouds as input preferred real due to simplicity...
We demonstrated a 1.91 μm pumped, injection-seeded Q-switched Ho:YAG laser operating at room temperature. By inserting two Fabry-Perot etalons into the cavity, single-frequency Tm, seed lasing was achieved wavelength of 2090.9 nm, with typical output power 60 mW. Single-frequency, nearly transform-limited operation by injection seeding. The energy pulse is 7.6 mJ, width 132 ns and repetition rate 100 Hz. measured spectrum, half-width which 3.5 MHz, heterodyne technique.
An efficient 2 μm room-temperature Q-switched Ho:GdVO4 laser end-pumped by a 1942 nm Tm-fiber is demonstrated. To our knowledge, this the first report of performance crystal. A maximum CW output power 6.85 W under absorbed pump 24.1 was obtained with slope efficiency 39.5% at temperature 17°C. With same power, energy per pulse about 0.9 mJ and minimum width 4.7 ns were pulsed repetition frequency (PRF) 5 kHz, corresponding to peak approximately 187.2 kW.
The unstructured mesh (UM)–based Monte Carlo (MC) method can utilize modern computer-aided-design/computer-aided-engineering platforms to obtain geometric models with reduced human effort and is capable of generating high-resolution tally data. This approach presents a significant advantage over the traditional Constructive Solid Geometry (CSG)–based MC in handling complex geometries conducting multiphysics calculations. In this study, UM-based calculation capability was developed code...
We demonstrate a diode-pumped, injection-seeded Q-switched Er:YAG laser operating at room temperature. The diode-pumped single-frequency monolithic nonplanar ring oscillator (NPRO) was used as the seed emitting 1645.22 nm with maximum output power of 550 mW. Single-frequency, operation achieved by injection seeding. energy pulse 3.5 mJ, width 195 ns repetition rate 100 Hz.
Summary Reliable relative permeability curves of polymer flooding are great importance to the history matching, production prediction, and design injection plan. Currently, obtained mainly by steady-state, nonsteady-state, pore-network methods. However, steady-state method is extremely time-consuming sometimes produces huge errors, while nonsteady-state suffers from its excessive assumptions incapable capturing effects diffusion adsorption. As for method, scale very small, which leads size...
A continuous wave mode-locked (CWML) Ho: YAG laser based on an acousto-optic modulator (AOM) pumped by a 1.9 μm Tm: YLF is demonstrated. This the first time report active CWML has been published. maximum output power of 1.04 W at 2097.25 nm in regime obtained pump 13.2 W, corresponding to slope efficiency 13.3%. The pulse repetition frequency 82.76 MHz and single energy 12.57 nJ. width 102 ps measured through no-background second harmonic autocorrelation with KTP as nonlinear crystal....
A diode pumped, injection-seeded -switched Er : YAG laser at is demonstrated. single frequency monolithic nonplanar ring oscillator (NPRO) emitting with a maximum output power of used as seed laser. The injected into bow-tie slave laser, obtaining stable single-frequency operation the energy pulse duration .
A compact continuous wave (CW) and actively Q-switched (AQS) Ho:LuVO4 laser pumped by a 1.94 μm Tm: YAP is demonstrated. The performance of the was investigated changing output coupler. maximum power 4.1 W at 2058.43 nm in CW regime obtained absorbed pump 12.3 W. minimum pulse width 29.3 ns Pulse Repetition Frequency (PRF) 20 kHz with same coupler corresponding to peak 6.9 kW. maximal center wavelength PRF 40 kHz, slope efficiency 43.0% respect power. M2 factors measured traveling knife-edge...
Abstract To improve the tensile properties of steel fiber–reinforced reactive powder concrete (SFRPC), we prepared aligned (ASFRPC) members by controlling fiber distribution under a magnetic field. Four‐point bending tests were carried out to examine flexural SFRPC and ASFRPC members. In comparison with same conditions, found that capacity increased 72.4%–149.5%. Moreover, toughness, residual strength coefficient, load greatly improved. The bearing toughness both reduced certain extent...
The deterministic methods are efficient for solving the neutron transport equation (NTE), but suffer from discretization errors. increasingly complex geometric models make spatial errors primary source of Considering that come inaccurate shape descriptions and low-accuracy numerical schemes, this paper develops a Discontinuous Galerkin Finite Element Method NTE on unstructured polygonal meshes to reduce In method, physical modal basis is adopted handle mesh achieve high-order accuracy in...
Abstract In this paper, reservoir simulation model is built so that the geological characteristics of West region in Gudao oilfield, which has entered into very high watercut development period, are described finely. Then, production history about 20 years was matched. Base on exact through match, remaining oil distribution and cyclic waterflooding mechanism studied systematically. The research achievements can be taken as reference for similar reservoirs have or period improved effects...