Publications by authors named "Xuning Liu"
Article Synopsis
- Researchers are developing artificial compound eyes (CE) modeled after arthropods to improve imaging technology, but current designs have issues with defocusing when used with standard CMOS cameras.
- A new compact camera inspired by South American shrimps utilizes a deep learning method to achieve clear wide-field imaging without complex hardware, significantly simplifying its design.
- The innovative camera, weighing only 5.4g and measuring 3 x 3 cm, shows superior resolution and 3D trajectory tracking, making it suitable for applications in nano-optics, medical endoscopy, and robotics.
Mineralization of dissolved organic matter (DOM) in thermokarst lakes plays a non-negligible role in the permafrost carbon (C) cycle, but remains poorly understood due to its complex interactions with external C and nutrient inputs (i.e., aquatic priming and nutrient effects).
View Article and Find Full Text PDFAn adaptive liquid lens with controllable light intensity is demonstrated, which can modulate both light intensity and beam spot size. The proposed lens consists of a dyed water solution, a transparent oil, and a transparent water solution. The dyed water solution is used to adjust light intensity distribution by varying the liquid-liquid (L-L) interface.
View Article and Find Full Text PDFPhotochemical and biological degradation of dissolved organic carbon (DOC) and their interactions jointly contribute to the carbon dioxide released from surface waters in permafrost regions. However, the mechanisms that govern the coupled photochemical and biological degradation of DOC are still poorly understood in thermokarst lakes. Here, by combining Fourier transform ion cyclotron resonance mass spectrometry and microbial high-throughput sequencing, we conducted a sunlight and microbial degradation experiment using water samples collected from 10 thermokarst lakes along a 1100-km permafrost transect.
View Article and Find Full Text PDFArticle Synopsis
- - Recent research highlights the response of the soil nitrogen cycle to permafrost thaw, specifically focusing on the largely unexplored anaerobic nitrogen transformations happening in thermokarst lakes, which represent a significant portion of permafrost landscapes.
- - A comprehensive study involving 30 thermokarst lakes in the Tibetan alpine permafrost region utilized various techniques to measure nitrogen transformations, revealing higher rates of nitrogen mineralization and ammonium immobilization in the eastern lakes compared to the west.
- - The study found that denitrification was the primary process for nitrate reduction, significantly outpacing other processes like anammox and DNRA, with microbial biomass and organic carbon content influencing the variability of nitrogen transformation rates across different lakes.