A5100352016- Advanced Fiber Optic Sensors
- Building Energy and Comfort Optimization
- Advanced Fiber Laser Technologies
- Photonic and Optical Devices
- Granular flow and fluidized beds
- Topic Modeling
- Laser-Matter Interactions and Applications
- Thermochemical Biomass Conversion Processes
- Combustion and flame dynamics
- Enhanced Oil Recovery Techniques
- Photonic Crystal and Fiber Optics
- Advanced Text Analysis Techniques
- Optical Systems and Laser Technology
- Petroleum Processing and Analysis
- Catalytic Processes in Materials Science
- Intermetallics and Advanced Alloy Properties
- Solid State Laser Technologies
- Wireless Sensor Networks and IoT
- Natural Language Processing Techniques
- Electric Motor Design and Analysis
- Electrical and Bioimpedance Tomography
- Optical Wireless Communication Technologies
- Wind Turbine Control Systems
- Forest Ecology and Biodiversity Studies
- Human Motion and Animation
China Electronics Technology Group Corporation
2024
National Engineering Research Center of Electromagnetic Radiation Control Materials
2024
Jiangnan University
2024
Yantai University
2023
Beijing Aerospace Flight Control Center
2019-2023
Xihua University
2022
Zhejiang University
2022
Tsinghua University
2019-2022
East China Normal University
2022
Beijing University of Technology
2022
Abstract: A sprinkler irrigation system was designed and applied for a tea field to achieve frost protection through latent heat released when water turning into ice. Frost effects during night were tested at different application rates by monitoring air temperature around canopy (Tc). Temperature sensors arranged distances from the sprinkler. The preliminary results showed that, worked continuously rate of 2-4 mm/h before sunrise, covered with ice Tc remained 0°C, preventing plants damage....
Abstract An all‐solid‐state pulse width adjustable Nd:YAG nanosecond laser at 1064 nm is demonstrated based on the bidirectional voltage supplied Q‐switched technology. Continuously pulse‐width from 4.6 to 32.3 ns generated in a linear cavity, which diode side‐pumped 808 100 Hz repetition rate. With 27 Q‐switch duration, shortest of with single energy 0.77 mJ and near‐Gaussian beam quality ( M 2 < 1.6) obtained. Our results suggest an approach generating lasers for applications LIDAR.
In this paper, we demonstrated an efficient degenerate middle infrared (mid-IR) ZGP-OPO that is pumped by electro-optically Q-switched diode-pumped Tm:YAP laser. The laser, operating at a repetition rate of 1 kHz, produced peak pulse energy 9.66 mJ 1.94 μm and minimum width 25 ns. Utilizing the laser as pump source, average output power 3.14 W 3.88 was achieved in with incident Tm 9.4 W, resulting slope efficiency 62.7% optical conversion 33.4%. measured 21 ns, leading to 149.5 kW....
Abstract Enhanced oil recovery (EOR) by surfactant flooding has been attractive. Among the surfactants developed alcohol polyoxypropylene (PO)‐polyoxyethylene (EO) ether sulfates (APES), also named extended surfactants, have proved efficient. However, arrangement of PO and EO chains as well hydrocarbon structure in molecules may significantly affect their performances. In this paper three APES, C 18−16 25 10 SO 4 Na (I), (PO/EO) 25+10 (II), 16 GA(PO/EO) (III) were prepared investigated,...
Abstract A method of admitting oil‐atomized air into a furnace to adjust coal combustion in down‐fired boiler is described. Experiments with small‐scale simulating down‐fired, pulverized‐coal, 300‐MW e utility were carried out at single‐phase test facility investigate the influence on aerodynamic field furnace. With acceleration oil by secondary air, primary air/fuel can reach more distant position respect burner nozzle and volume recirculation zone shrinks. Industrial experiments also...
This paper describes the physical design, rf measurement, and tuning result of a 325 MHz four-vane radio frequency quadrupole (RFQ) with ramped inter-vane voltage. The 3-meter-long RFQ will accelerate negative hydrogen ion beam from 50 keV to 3 MeV peak current 5 mA, pulse width $10--40\text{ }\text{ }\ensuremath{\mu}\mathrm{s}$, maximum repetition rate 0.5 Hz. During we reveal that coupling loop coaxial coupler adopted for this enhances interference between dipole field distribution...
The variation in fine root traits terms of size inequality at the individual level can be identified as a strategy for adapting to drastic changes soil water and nutrient availabilities. Gini Lorenz asymmetry coefficients have been applied describe overall degree inequality, which, however, are neglected when conventional statistical means calculated. Here, we used coefficient, coefficient mean an investigation
Lack of suitable towed array has existed as a main problem for further extended use small underwater mobile platforms such UUV. In this paper, an ultra-thin fiber-optic hydrophone is developed based on DFB fiber laser, which diameter only 12mm. And the performance tested by towboat. The experimental results show that noise 69dB re. uPa/√Hz@1kHz. addition, can precisely determine spatial characteristics acoustic field at 6 knots, verifies feasibility laser in UUV and other platforms.
A zero drift suppression method of a distributed feedback (DFB) fiber laser hydrophone is studied. The working principle the DFB and cause, phenomenon, influence are briefly introduced. design idea implementation described in detail. differential cross-multiplication demodulation improved by adding closed-loop control to appropriate stage, problem solved without any hardware modification. Simulation analysis experiments performed verify feasibility effectiveness method. experimental results...
A laser shadowgraphy system was built based on a Nd:YAG backlight with half width of 9 ns and wavelength 532 nm. It has the capacity time resolution integration simultaneously during lighting by utilizing streak camera commercial digital as image recording devices. Experimental study insulated-ordinary mixed planar wire array Z pinches carried out Qiangguang-I facility. results indicate that expansion corona plasma insulated tungsten wires is slower than ordinary over ablation stage. Average...
Text-to-SQL parsing and end-to-end question answering (E2E TQA) are two main approaches for Table-based Question Answering task. Despite success on multiple benchmarks, they have yet to be compared their synergy remains unexplored. In this paper, we identify different strengths weaknesses through evaluating state-of-the-art models benchmark datasets: demonstrates superiority in handling questions involving arithmetic operations long tables; E2E TQA excels addressing ambiguous questions,...
A spectral splicing method is proposed for an optical frequency domain reflectometry (OFDR) sensing system using a distributed Bragg reflector (DBR) laser. An external cavity tunable laser (ECTL) used in conventional OFDR system. There are no reports to our knowledge about DBR as the light source has advantages of small size, mechanical scanning, easy integration, and low cost. However, due mode hopping, wavelength can only be continuously tuned range 1 nm. The was splice 39 partially...