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Your search keyword '"Shao, Liyang"' showing total 145 results
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145 results on '"Shao, Liyang"'

1. Winning of inhomogeneous bad for curves

Author

Datta, Shreyasi and Shao, Liyang

Subjects
Mathematics - Number Theory, Mathematics - Dynamical Systems, 11J13, 11J83, 37A17
Abstract

We prove the absolute winning property of weighted simultaneous inhomogeneous badly approximable vectors on non-degenerate analytic curves. This answers a question by Beresnevich, Nesharim, and Yang. In particular, our result is an inhomogeneous version of the main result in \cite{BNY22} by Beresnevich, Nesharim, and Yang. Also, the generality of the inhomogeneous part that we considered extends the previous result in \cite{ABV}. Moreover, our results even contribute to classical results, namely establishing the inhomogeneous Schmidt's conjecture in arbitrary dimensions.

Published
2023

2. Compressed domain vibration detection and classification for distributed acoustic sensing

Author

Shen, Xingliang, Wu, Huan, Zhu, Kun, Li, Yujia, Zheng, Hua, Li, Jialong, Shao, Liyang, Shum, Perry Ping, and Lu, Chao

Subjects
Electrical Engineering and Systems Science - Signal Processing
Abstract

Distributed acoustic sensing (DAS) is a novel enabling technology that can turn existing fibre optic networks to distributed acoustic sensors. However, it faces the challenges of transmitting, storing, and processing massive streams of data which are orders of magnitude larger than that collected from point sensors. The gap between intensive data generated by DAS and modern computing system with limited reading/writing speed and storage capacity imposes restrictions on many applications. Compressive sensing (CS) is a revolutionary signal acquisition method that allows a signal to be acquired and reconstructed with significantly fewer samples than that required by Nyquist-Shannon theorem. Though the data size is greatly reduced in the sampling stage, the reconstruction of the compressed data is however time and computation consuming. To address this challenge, we propose to map the feature extractor from Nyquist-domain to compressed-domain and therefore vibration detection and classification can be directly implemented in compressed-domain. The measured results show that our framework can be used to reduce the transmitted data size by 70% while achieves 99.4% true positive rate (TPR) and 0.04% false positive rate (TPR) along 5 km sensing fibre and 95.05% classification accuracy on a 5-class classification task.

Published
2022

9. 561 - Dupilumab treatment reduces signs in patients with atopic hand and foot dermatitis: results from a phase 3, randomized, double-blind, placebo-controlled trial

Author

Simpson, Eric L, primary, Soong, Weily, additional, Worm, Margitta, additional, Pinter, Andreas, additional, Masuda, Koji, additional, Shao, Liyang, additional, Dubost-Brama, Ariane, additional, Bansal, Ashish, additional, Korotzer, Andrew, additional, and Rossi, Ana B, additional

Published
2024
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10. 566 - Efficacy of dupilumab treatment in atopic hand and foot dermatitis across morphological subtypes: results from a phase 3, randomized, double-blind, placebo-controlled trial

Author

Worm, Margitta, primary, Simpson, Eric L, additional, Honari, Golara, additional, Soong, Weily, additional, Pinter, Andreas, additional, Masuda, Koji, additional, Shao, Liyang, additional, Dubost-Brama, Ariane, additional, Bansal, Ashish, additional, Korotzer, Andrew, additional, and Rossi, Ana B, additional

Published
2024
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19. Compact optical fiber sensor based on Vernier effect with speckle patterns

Author

Zhao, Fang, primary, Lin, Weihao, additional, Guo, Penglai, additional, Hu, Jie, additional, Liu, Yuhui, additional, Liu, Shuaiqi, additional, Yu, Feihong, additional, Zuo, Guomeng, additional, Wang, Guoqing, additional, Liu, Huanhuan, additional, Chen, Jinna, additional, Li, Yi, additional, Shum, Perry Ping, additional, and Shao, Liyang, additional

Published
2023
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20. Fiber-based High-resolution Raman Endoscopic Probe

Author

Chen, Junfan, primary, Hu, Jiaqi, additional, Xiong, Qiaozhou, additional, Xue, Chenlong, additional, Zhang, Aoyan, additional, Dang, Hong, additional, Lu, Dan, additional, Bai, Xiaosong, additional, Lin, Weihao, additional, Liu, Yuhui, additional, Liu, Huanhuan, additional, Shao, Liyang, additional, Chen, Gina Jinna, additional, Cong, Longqing, additional, and Shum, Perry Ping, additional

Published
2023
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21. Cisplatin SERS Detection Based on the Binding of Sulfhydryl Groups

Author

Xue, Chenlong, primary, Hu, Jiaqi, additional, Xiang, Yanqun, additional, Chen, Junfan, additional, Wei, Junyu, additional, Lv, Jinqian, additional, Zhang, Aoyan, additional, Dang, Hong, additional, He, Hao, additional, Hu, Jie, additional, Shao, Liyang, additional, Chen, Gina Jinna, additional, Gao, Zhen, additional, and Shum, Perry Ping, additional

Published
2023
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23. Spatially Modulated Fiber Speckle for High-Sensitivity Refractive Index Sensing

Author

Guo, Penglai, primary, Liu, Huanhuan, additional, Zhou, Zhitai, additional, Hu, Jie, additional, Wang, Yuntian, additional, Peng, Xiaoling, additional, Yuan, Xun, additional, Shu, Yiqing, additional, Zhang, Yingfang, additional, Dang, Hong, additional, Xu, Guizhen, additional, Zhang, Aoyan, additional, Xue, Chenlong, additional, Hu, Jiaqi, additional, Shao, Liyang, additional, Chen, Jinna, additional, Li, Jianqing, additional, and Shum, Perry Ping, additional

Published
2023
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27. Polyphase Unimodular Coding in Phase-Sensitive OTDR for Low Crosstalk

Author

Zhang, Tianfang, Lin, Quancong, Lv, Jie, Li, Wei, Cheng, Linghao, Liang, Hao, Shao, Liyang, and Guan, Bai-Ou

Abstract

Using coding in phase sensitive optical time domain reflectometry (ϕ-OTDR) system has long been pursued. However, since no single sequence with ideal aperiodic autocorrelation has been found, sidelobes of aperiodic autocorrelation induce crosstalk among sensors. Finding coding schemes with as low crosstalk as possible is very meaningful. In this paper, a novel ϕ-OTDR scheme with coding using polyphase unimodular sequence is proposed. Theoretical analysis of crosstalk due to coding sequence is presented at first. It shows that crosstalk is upper-bounded by sidelobes of aperiodic autocorrelation which is also an effective indicator of crosstalk level. Polyphase unimodular sequence with very low aperiodic autocorrelation sidelobes has then been searched through optimization of the Frank sequence using gradient descent algorithm. The merit factor (MF) of the obtained sequence is more than 2 times of that of the original Frank sequence. Compared to the pseudorandom binary sequence (PRBS), the MF of the obtained sequence is more than 10 dB higher. The evolution of MF of the obtained sequence at various stages and different transmission distance in a ϕ-OTDR system is demonstrated, which confirms that the sequence can support long-range sensing even though phases of the sequence are densely spaced. A ϕ-OTDR system with a weak fiber Bragg grating (WFBG) array is then set up to quantify crosstalk due to the polyphase unimodular sequence. In comparison to PRBS, experiment results confirm that the polyphase unimodular sequence has much lower crosstalk level and enhance the crosstalk rejection ratio by more than 10 dB.

Published
2024
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28. Integrated Fading Suppression for Phase-Sensitive OTDR: An Algorithm Set

Author

Yu, Feihong, Liu, Shuaiqi, Xu, Deyu, Gu, Huaxin, Liu, Chuanqing, Wu, Yu, Zhang, Haifeng, and Shao, Liyang

Abstract

Interference fading problem is an inevitable challenge in distributed acoustic sensing (DAS) system, and the uncertainty of the dynamic external environment further increases the difficulty of denoising. Based on the conventional single-domain fading suppression methods, we propose the concept of integrated fading suppression (IFS) algorithm set, which provides four denoising approaches and each of them is composed of at least two independent techniques. The combination of multiple single-domain denoising methods enhances the reliability of the proposed method. In an experiment involving 30 sets of data, the IFS algorithm set succeeded in completely eliminating all fading noise. In addition, the demodulation results show that compared to only applying a bandpass filter, these four IFS algorithms could improve the intensity signal-to-noise ratio by an average of 5.82 dB, while decreasing the amplitude fluctuation range by 31.84 dB on average. Benefiting from its powerful fading suppression capability, the average strain noise of the demodulated results obtained by the proposed algorithm set goes down to 0.47 nϵ. It is worth noting that the IFS algorithm set with four denoising methods is highly flexible and could meet different requirements and preferences. With the proposed IFS algorithm set, it is expected that the DAS system could be thoroughly free from the influence of interference fading.

Published
2024
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34. Demodulation of DBR Fiber Laser Sensors with Speckle Patterns

Author

Zhao, Fang, primary, Lin, Weihao, additional, Guo, Penglai, additional, Hu, Jie, additional, Liu, Shuaiqi, additional, Yu, Feihong, additional, Zuo, Guomeng, additional, Wang, Guoqing, additional, Liu, Huanhuan, additional, Chen, Jinna, additional, Li, Yi, additional, Shum, Perry Ping, additional, and Shao, Liyang, additional

Published
2023
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48. Refractive Index Detection of Liquid Analyte in Broad Range Using Multimode Fiber Speckle Sensor

Author

Guo, Penglai, primary, Peng, Xiaoling, additional, Li, Jianqing, additional, Guo, Penglai, additional, Zhou, Zhitai, additional, Hu, Jie, additional, Xue, Chenlong, additional, Hu, Jiaqi, additional, Li, Jialong, additional, Dang, Hong, additional, Chen, Jinna, additional, Shao, Liyang, additional, Liu, Huanhuan, additional, and Shum, Perry Ping, additional

Published
2022
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