A5057024926- Spectroscopy and Laser Applications
- Advanced Fiber Optic Sensors
- Advanced Sensor Technologies Research
- Semiconductor Lasers and Optical Devices
- Oil and Gas Production Techniques
- Laser Design and Applications
- Analytical Chemistry and Sensors
- Photonic and Optical Devices
- Drilling and Well Engineering
- Engineering Diagnostics and Reliability
- Water Quality Monitoring and Analysis
- Tribology and Lubrication Engineering
- Flow Measurement and Analysis
- Engineering Applied Research
- Hydraulic and Pneumatic Systems
- Optical Systems and Laser Technology
- Advanced Sensor and Control Systems
- Advanced Fiber Laser Technologies
- NMR spectroscopy and applications
- Advanced Optical Sensing Technologies
- Machine Fault Diagnosis Techniques
- Spectroscopy Techniques in Biomedical and Chemical Research
China University of Petroleum, East China
2023-2025
Shandong University
2013-2014
The continuous wave mud channel is an extremely complex channel, and the signal transmitted with phenomena such as inter-code crosstalk, which leads to a decrease in correct rate of information transmission. Channel equalizers can effectively solve problems crosstalk. Compared traditional equalizer, neural network equalizer has better equalization effect, but NARX slow convergence speed tends fall into local optimal solutions. To above problems, method based on Particle Swarm Optimization...
A novel temperature demodulation method which eliminates the impact of Rayleigh scattering on Raman distributed sensors (RDTS) using anti-Stokes light only is presented. This utilizes two sections reference fiber are placed into control chambers with different temperatures, such that caused by variation laser' power and eliminated temperatures. In experiment, error was decreased 0.6℃ 1.7℃ at 30℃ 50℃compared conventional respectively.
In trace water vapor direct absorption spectroscopy, the signal is buried in noise and up downs of light intensity, an effective extraction method vital. basis double-beam differential absorption, division voltage approach based on balanced ratiometer detection (BRD) were studied. Voltage has excellent stability to temperature variation, mechanical extrusion fiber bend loss. As BRD method, it outstanding self-adjusting capability can also avoid excess phase difference caused by...
Two measuring methods of the wide absorption spectrum by distributed feedback laser diodes (DFB-LDs) are presented in detecting water vapor line. One is subsection scanning method, and it takes advantage tuning range temperature modulation fast speed current modulation. Specifically, this method realized dividing a target spectral region into several sections which correspond to specific DFB-LD, every section for hundreds times, averaging data raise signal noise ratio (SNR), then combining...
Two measuring methods of wide absorption spectrum by DFB-LDs are presented in detecting water vapor line. One is subsection scanning method, it takes advantage tuning range temperature modulation and fast speed current modulation, specifically, this method realized dividing a target spectral region into several sections which corresponding to specific DFB-LD, every section for hundreds times average the data raise SNR, combining all get whole spectrum. An accuracy 10 ppmv had been obtained...