A5033485685- Electrical and Bioimpedance Tomography
- Flow Measurement and Analysis
- Fault Detection and Control Systems
- Atomic and Subatomic Physics Research
- Quantum optics and atomic interactions
- Magnetic and transport properties of perovskites and related materials
- Fire dynamics and safety research
- Image and Signal Denoising Methods
- Combustion and Detonation Processes
- Advanced Image and Video Retrieval Techniques
- Advanced Frequency and Time Standards
- Hemodynamic Monitoring and Therapy
- 2D Materials and Applications
- Magnetic Properties of Alloys
- Advanced Neural Network Applications
- Photoacoustic and Ultrasonic Imaging
- Transition Metal Oxide Nanomaterials
- Advanced MRI Techniques and Applications
- Advanced Image Fusion Techniques
- Sparse and Compressive Sensing Techniques
- Combustion and flame dynamics
- High voltage insulation and dielectric phenomena
- Magnetic Properties and Applications
- Ga2O3 and related materials
- Cold Atom Physics and Bose-Einstein Condensates
Institute of Mechanics
2025
China Academy of Space Technology
2021-2024
Beihang University
2018-2021
Automatic detection and localization of objects in remote sensing images are great significance for systems. Existing frameworks usually train an object network using collected images. However, these models perform poorly due to the lack large-scale training datasets, which is often case special scenarios, e.g., ships open sea. Although image synthesis a common strategy alleviate issue data insufficiency, trained model still performs when being tested on real-world scenes. Aimed at this,...
Measurement of combustion temperature field is essential for diagnosis. As intrusive devices measurement interfere the flow flame, nonintrusive thermometry techniques are highly desired. Electrical tomography, which a noncontact technique and can reconstruct complex admittivity distribution in promising However, needs to be mapped practical applications. In this article, an ion current probe thermocouple measured electrical served as calibration establishing mapping model from reconstructed...
Electrical capacitance tomography has been widely used in flame monitoring. In this paper, a dual-modality electrical system was developed for imaging of admittivity distribution, including conductivity and permittivity distributions. An admittance measuring circuit to obtain both resistance the impedance, Calderon method-based reconstruction algorithm developed, which could be directly reconstruct cross-sectional images flame. The 2-D 3-D phantoms were modeled simulation validate...
Electrical capacitance tomography (ECT) utilizes measured mutual capacitances across a region of interest to visualize distributions inside. As typical two-phase flows can be roughly treated as binary-valued material distributions, in this article, fuzzy PID-controlled iterative algorithm is proposed for image reconstruction cases binary distributions. A closed-loop control system includes PID controller, Calderon’s method, and fast calculation the Dirichlet-to-Neumann map. Capacitances an...
Heating the vapor cell without introducing magnetic field is a requirement for magnetically sensitive atomic instruments. But, inevitable in electrical heating mode. Therefore, how to realize optimal design of electric film becomes an important issue practice. To solve this problem, quantitative analysis cancellation conducted, and quadra-layered multipole moment proposed with optimized conduction pattern. First, considering that wire number current directions may influence field, different...
The alkali metal atoms in spin-exchange-relaxation-free (SERF) atomic magnetometers require high temperature and non-magnetic environment. Increasing the of causes higher density, which can enhance intensity output signal. However, heating current introduces additional magnetic flux density unexpected gradient, will reduce device's sensitivity. Therefore, it is necessary to develop a chip for SERF magnetometer. In this paper, new design chips, fabricated by microelectromechanical system...
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In this article, an annular electrical capacitance tomography (ECT) sensor was designed, and a revised Calderon image reconstruction method proposed for monitoring the flashback flame of bluff-body burner. The central support used as internal electrode sensor, external array fixed on outer surface values all pairs electrodes, including external, composed boundary matrix sensing field. compared with commonly sensitivity matrix-based methods linear back projection (LBP) Landweber imaging...
Electrical tomography has been used to monitor the processes of flame ignition, fluctuation and extinction. To obtain more quantitative key information from images conductivity permittivity distributions, a calibration method is necessary for studies on different combustors. In this paper, ion probe sensor proposed as means verification electrical in monitoring. From impedance data probe, local can be calculated. Both an system were experimented alcohol lamp. The experiment results are that...
For the magnetically sensitive atomic sensors, heating vapor cell without introducing magnetic field is required. In order to evaluate film suppression effect, independent magnetometer usually employed. However, in this method accuracy of measurement result greatly affected by distance between and tested film, as inversely proportional distance. overcome issue, an in-situ proposed. The principle based on Larmor precession spin polarized noble gases. assembled into sensor can be measured...
Flame flashback poses a significant threat to combustors, necessitating the development of reliable detection methods. However, detecting is challenging due its occurrence within premixing tube. In this study, we employed an electrical capacitance tomography (ECT) system, capable nonintrusively reconstructing permittivity distribution in opaque tubes, address challenge. A bluff-body stabilized combustor under acoustic excitation was utilized generate controllable flashback. To reconstruct...
Electrical capacitance tomography (ECT) is a technique that uses image reconstruction algorithms to reconstruct permittivity distributions in the region of interest (ROI) with capacitances measured at boundary ROI. In this paper, closed-loop iterative algorithm proposed, and it aims eliminate error between recuperative capacitances, way, quality reconstructed images improved. The proposed includes three parts, namely, Fractional-order Proportional Integral Derivative (FPID) controller,...