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Your search keyword '"Yin, Xiaobo"' showing total 42 results
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42 results on '"Yin, Xiaobo"'

2. On the convergence to local limit of nonlocal models with approximated interaction neighborhoods

Author

Du, Qiang, Xie, Hehu, and Yin, Xiaobo

Subjects
Mathematics - Numerical Analysis, 45A05, 45N05, 45P05, 46N20, 65R20, 65R99
Abstract

Many nonlocal models have adopted Euclidean balls as the nonlocal interaction neighborhoods. When solving them numerically, it is sometimes convenient to adopt polygonal approximations of such balls. A crucial question is, to what extent such approximations affect the nonlocal operators and the corresponding solutions. While recent works have analyzed this issue for a fixed horizon parameter, the question remains open in the case of a small or vanishing horizon parameter, which happens often in many practical applications and has significant impact on the reliability and robustness of nonlocal modeling and simulations. In this work, we are interested in addressing this issue and establishing the convergence of the nonlocal solutions associated with polygonally approximated interaction neighborhoods to the local limit of the original nonlocal solutions. Our finding reveals that the new nonlocal solution does not converge to the correct local limit when the number of sides of polygons is uniformly bounded. On the other hand, if the number of sides tends to infinity, the desired convergence can be established. These results may be used to guide future computational studies of nonlocal models.

Published
2021

20. Cool photonics for sustainable agriculture

Author

Bai, Xiaopeng and Yin, Xiaobo

Abstract

High temperatures cause thermal stress, impair plant physiology, and reduce crop yield. In a recent publication in Nexus, Wang et al. describe a radiative cooling mulch for soil cooling. This technique increases crop yield in hot climates by alleviating thermal stress on plant roots and reducing soil evaporation, facilitating sustainable agriculture in regions prone to thermal stress.

Published
2024
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32. Dual-compressed photoacoustic single-pixel imaging.

Author

Guo, Yuning, Li, Baowen, and Yin, Xiaobo

Subjects
ACOUSTIC imaging, OPTICAL modulation, PHOTOACOUSTIC spectroscopy, THREE-dimensional imaging, OPTICAL resolution, SPATIAL resolution
Abstract

Photoacoustic imaging, an acoustic imaging modality with potentially optical resolution in an optical turbid medium, has attracted great attention. However, the convergence of wavefront optimization and raster scanning in computational photoacoustic imaging leads to the challenge of fast mapping, especially for a spatial resolution approaching the acoustic deep-subwavelength regime. As a sparse sampling paradigm, compressive sensing has been applied in numerous fields to accelerate data acquisition without significant quality losses. In this work, we propose a dual-compressed approach for photoacoustic surface tomography that enables high-efficiency imaging with 3D spatial resolution unlimited by the acoustics in a turbid environment. The dual-compressed photoacoustic imaging with single-pixel detection, enabled by spatially optical modulation with synchronized temporally photoacoustic coding, allows decoding of the fine optical information from the modulated acoustic signal even when the variance of original photoacoustic signals is weak. We perform a proof-of-principle numerical demonstration of dual-compressed photoacoustic imaging, that resolves acoustic sub-acoustic-wavelength details with a significantly reduced number of measurements, revealing the potential for dynamic imaging. The dual-compressed concept, which transforms unobtrusive spatial difference into spatio-temporal detectable information, can be generalized to other imaging modalities to realize efficient, high-spatial-resolution imaging. [ABSTRACT FROM AUTHOR]

Published
2023
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42. Selective directional liquid transport on shoot surfaces of Crassula muscosa .

Author

Yang L, Li W, Lian J, Zhu H, Deng Q, Zhang Y, Li J, Yin X, and Wang L

Abstract

Directional liquid transport has been widely observed in various species including cacti, spiders, lizards, the pitcher plant Nepenthes alata , and Araucaria leaves. However, in all these examples the liquid transport for a specific liquid is completely restricted in a fixed direction. We demonstrate that Crassula muscosa shoot surfaces have the ability to transport a specific liquid unidirectionally in either direction. This is accomplished through the presence of asymmetric reentrant leaves with varying reentrant angles, which yields the variation in liquid meniscus heterogeneity. These findings enable engineered biomimetic structures capable of selective directional liquid transport, with functions such as intelligent flow direction switching, liquid distribution, and mixing.

Published
2024
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