A5066549239- Digital Holography and Microscopy
- Fluid Dynamics and Heat Transfer
- Advanced Chemical Sensor Technologies
- Combustion and flame dynamics
- Gas Sensing Nanomaterials and Sensors
- Analytical Chemistry and Sensors
- Particle Dynamics in Fluid Flows
- Electrohydrodynamics and Fluid Dynamics
- Image Processing Techniques and Applications
- Microfluidic and Bio-sensing Technologies
- Coal Properties and Utilization
- Fire dynamics and safety research
- Industrial Gas Emission Control
- Fault Detection and Control Systems
- Combustion and Detonation Processes
- Advanced Optical Imaging Technologies
- Orbital Angular Momentum in Optics
- Fluid Dynamics and Mixing
- Fluid Dynamics and Turbulent Flows
- Air Quality Monitoring and Forecasting
- Aerodynamics and Acoustics in Jet Flows
- Coal Combustion and Slurry Processing
- Optical measurement and interference techniques
- Computer Graphics and Visualization Techniques
- Catalytic Processes in Materials Science
Zhejiang University
2015-2024
State Key Laboratory of Clean Energy Utilization
2015-2024
Jiaxing University
2024
Ningbo University
2022-2024
Purdue University West Lafayette
2018-2021
China Aerodynamics Research and Development Center
2019
Rapid detection of low concentration toluene is highly desirable in environment monitoring, industrial processes, medical diagnosis, etc. In this study, we prepared Pt-loaded SnO2monodispersed nanoparticles through hydrothermal method and assembled a sensor based on micro-electro-mechanical system (MEMS) to detect toluene. Compared with the pure SnO2, 2.92 wt% SnO2sensor exhibits 2.75 times higher gas sensitivity at about 330 °C. Meanwhile, also has stable good response 100 ppb Its...
A digital holographic particle tracking velocimetry system is applied to quantitatively study the drop atomization induced by capillary waves, and breakup caused increased sound pressure levels. wavelet-based algorithm used for detection autofocusing with a wide size range of 20 μm-2 mm. To eliminate influence large particles on small particles, two-step method adopted. Large drops are first characterized simulated diffraction-based model. Then contributions subtracted from original hologram...
The 3D measurement of the particles in a gas-solid pipe flow is great interest, but remains challenging due to curved walls various engineering applications. Because astigmatism induced by pipe, concentric ellipse fringes hologram spherical are observed experiments. With theoretical analysis particle holography an ABCD matrix, in-focus image can be reconstructed modified convolution method and fractional Fourier transform. Thereafter, size, position, velocity simultaneously measured digital...
Detecting hydrogen leaks remains a pivotal challenge demanding robust solutions. Among diverse detection techniques, the fiber-optic method distinguishes itself through unique benefits, such as its distributed measurement properties. The adoption of hydrogen-sensitive materials coated on fibers has gained significant traction in research circles, credited to operational simplicity and exceptional adaptability across varied conditions. This manuscript offers an exhaustive investigation into...
Dynamic stringy objects such as liquid rims and ligaments are frequently observed in important applications the multiphase breakup of fuel droplets. We develop a new method based on digital in-line holography to automatically measure complicated objects. A static spring mounted rotator is measured validate effectiveness accuracy method. The sections extracted along skeleton depth-of-field extended image then sized located individual particles using hybrid surface points stitched together...
The chemical industrial park is an important source of volatile organic compounds (VOCs) emissions which difficult to monitor due its diversity and low concentration. In this work, a hybrid sensor array consisting six gas sensors (four semiconductor sensors, one electrochemical sensor, photo ionization detector) was constructed measure VOCs. Three most frequently detected VOCs in Chinese fine park, namely toluene, dichloromethane, ethyl acetate, their mixtures, were tested all below 5 ppm...
A long working distance digital holographic system is developed to study burning coal particles, which are less than 200 μm in diameter, a methane-air flame. general model for the lensed holography introduced first. An optimal lateral resolution of 3.9 achieved while object located at safe (>15 cm) from optical apparatus. The evolutions particle morphology and devolatilization products observed. Sizes three-dimensional velocities particles measured compared burner outlet, 10 24 cm above...
Comprehension on the primary fragmentation of coal particles is important in understanding and optimizing practical combustion creating credible models. High-speed digital inline holography (DIH) at 6000 Hz employed to investigate China Ximeng lignite (90–154 μm) during devolatilization. The particle morphologies, 3D trajectories, size evolutions parent coals as well corresponding fragments are captured by time-resolved holographic visualization. Three modes, center,...
Many studies focus on feature extraction and selection of gas sensor arrays for identification. In this work, we intended to find a subset obtained by selecting the most important features simultaneously improving component concentration detection performance array three harmful VOCs (toluene, methanol, ethanol) their mixtures. First, 30 were extracted from 6 sensors’ responses form multi-feature set. Then, two methods based Wilks’ Λ-statistic random forest employed obtain best combination....
The effects of the individual scattering process on formations both particle hologram and its corresponding reconstructed three-dimensional image are investigated using Debye series. A model series decomposes object wave into different modes thus permits evaluating [diffraction, reflection, transmission, refractions with (p-1) internal reflections] holography quantitatively. In Gabor inline a transparent droplet, transmission light causes small discrepancies between fringes an opaque...