Publications by authors named "Yu Xiuwu"
Article Synopsis
- Underwater wireless sensor networks face challenges in node positioning accuracy due to factors like tidal motion, ocean currents, and multipath effects.
- To enhance positioning accuracy for moving nodes, a method based on a tidal motion model is introduced, leveraging Time Difference of Arrival (TDOA) localization optimized by niche genetic algorithms.
- Simulation results show this new algorithm outperforms traditional methods (like the Chan and Taylor algorithms) in accuracy, and real-time updates using a Kalman filter help ensure that predicted positions closely match actual ones, meeting application needs.
In this paper, we present an ultrawide-range radiation detection method based on dynamic recognition and analysis of the response signal of a monolithic active pixel sensor (MAPS). Our analysis of the MAPS response mechanism determined that adaptive adjustment of the sensor's integral time is key to quantification of ionizing radiation in an ultrawide range. We also determined that different data processing methods are required for accurate quantification of high and low radiation dose rates.
View Article and Find Full Text PDFWe present γ-ray radiation detection in a neutron radiation environment using a monolithic active pixel sensor (MAPS) camera without conversion or shielding layers. The measured output signal is the sum of the pedestal value, noise, and real radiation response signal. The sensor response shows that the MAPS camera is sensitive to neutrons and can capture a single photon.
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