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Your search keyword '"Shi, Yuqing"' showing total 361 results
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361 results on '"Shi, Yuqing"'

1. Universal property of the Bousfield--Kuhn functor

Author

Shi, Yuqing

Subjects
Mathematics - Algebraic Topology, 55Q51, 16S30, 18N60 (Primary) 18N70, 55U35, 18M70 (Secondary)
Abstract

We present a universal property of the Bousfield--Kuhn functor $\operatorname{\Phi}_h$ of height $h$, for every positive natural number $h$. This result is achieved by proving that the costabilisation of the $\infty$-category of $v_h$-periodic homotopy types is equivalent to the $\infty$-category of $\operatorname{T}(h)$-local spectra. A key component in our proofs is the spectral Lie algebra model for $v_h$-periodic homotopy types (see arXiv:1803.06325): We relate the costabilisation of the $\infty$-category of spectral Lie algebras with the costabilisations of the $\infty$-category of non-unital $\mathcal{E}_{n}$-algebras, via our construction of higher enveloping algebras of spectral Lie algebras., Comment: 44 pages

Published
2024

6. Multi-stage Progressive Reasoning for Dunhuang Murals Inpainting

Author

Liu, Wenjie, Liu, Baokai, Du, Shiqiang, Shi, Yuqing, Li, Jiacheng, and Wang, Jianhua

Subjects
Computer Science - Computer Vision and Pattern Recognition
Abstract

Dunhuang murals suffer from fading, breakage, surface brittleness and extensive peeling affected by prolonged environmental erosion. Image inpainting techniques are widely used in the field of digital mural inpainting. Generally speaking, for mural inpainting tasks with large area damage, it is challenging for any image inpainting method. In this paper, we design a multi-stage progressive reasoning network (MPR-Net) containing global to local receptive fields for murals inpainting. This network is capable of recursively inferring the damage boundary and progressively tightening the regional texture constraints. Moreover, to adaptively fuse plentiful information at various scales of murals, a multi-scale feature aggregation module (MFA) is designed to empower the capability to select the significant features. The execution of the model is similar to the process of a mural restorer (i.e., inpainting the structure of the damaged mural globally first and then adding the local texture details further). Our method has been evaluated through both qualitative and quantitative experiments, and the results demonstrate that it outperforms state-of-the-art image inpainting methods.

Published
2023

18. Prevalence, risk factors, impact and management of pneumonia among preschool children in Chinese seven cities: a cross-sectional study with interrupted time series analysis

Author

Shi, Haonan, Wang, Tingting, Zhao, Zhuohui, Norback, Dan, Wang, Xiaowei, Li, Yongsheng, Deng, Qihong, Lu, Chan, Zhang, Xin, Zheng, Xiaohong, Qian, Hua, Zhang, Ling, Yu, Wei, Shi, Yuqing, Chen, Tianyi, Yu, Huaijiang, Qi, Huizhen, Yang, Ye, Jiang, Lan, Lin, Yuting, Yao, Jian, Lu, Junwen, and Yan, Qi

Published
2023
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24. Goodwillie's cosimplicial model for the space of long knots and its applications

Author

Shi, Yuqing

Subjects
Mathematics - Algebraic Topology, Mathematics - Geometric Topology
Abstract

We work out the details of a correspondence observed by Goodwillie between cosimplicial spaces and good functors from a category of open subsets of the interval to the category of compactly generated weak Hausdorff spaces. Using this, we compute the first page of the integral Bousfield--Kan homotopy spectral sequence of the tower of fibrations given by the Taylor tower of the embedding functor associated to the space of long knots. Based on the methods in [Con08], we give a combinatorial interpretation of the differentials $d^1$ mapping into the diagonal terms, by introducing the notion of $(i, n)$-marked unitrivalent graphs., Comment: Revised according to referee report. Published in the Journal of Homotopy and Related Structures

Published
2020
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25. Cognitive Aging: How the Brain Ages?

Author

Zhao, Shaokun, Li, Yumeng, Shi, Yuqing, Li, Xin, Crusio, Wim E., Series Editor, Dong, Haidong, Series Editor, Radeke, Heinfried H., Series Editor, Rezaei, Nima, Series Editor, Steinlein, Ortrud, Series Editor, Xiao, Junjie, Series Editor, and Zhang, Zhanjun, editor

Published
2023
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34. Research progress in electrochemical sensors based on MXene

Author

CHEN Da, SHI Yuqing, ZHANG Wei, and LIAN Meiling

Subjects
mxene, electrochemistry, enzyme sensor, immunosensor, aptamer sensor, Materials of engineering and construction. Mechanics of materials, TA401-492
Abstract

MXene is a two-dimensional (2D) layered material composed of early transition metal carbides, nitrides and carbonitride. Due to MXene's unique layered morphology, high electrical conductivity, high specific surface area, excellent hydrophilicity and good thermal stability, it has broad application prospect in the fields of physics, materials, chemistry and nanotechnology. It can also be used in a variety of scientific fields such as catalysis, energy storage and sensors. This paper mainly reviews the research progress in electrochemical sensors based on MXene. Firstly, the principle, composition, electrode surface modification of electrochemical sensors and the preparation methods of MXene were introduced. Then, the research progress of MXene in electrochemical enzyme sensors, electrochemical non-enzyme sensors, electrochemical immunosensors, electrochemical aptamer sensors and electrochemical molecularly imprinted sensors were reviewed. Finally, the industrialization and commercialization of MXene electrochemical sensing field, and the challenges of the development of new types of MXene were pointed out. The applications of MXene in various analytes and more potential fields were also prospected.

Published
2022
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36. Pyramid Textured Photonic Films with High‐Refractive Index Fillers for Efficient Radiative Cooling.

Author

Fu, Yuting, Chen, Le, Guo, Yuao, Shi, Yuqing, Liu, Yanjun, Zeng, Yuqiang, Lin, Yuanjing, and Luo, Dan

Subjects
BORON nitride, THERMAL conductivity, GLOBAL warming, SURFACE structure, COOLING systems
Abstract

Sub‐ambient cooling technologies relying on passive radiation have garnered escalating research attention owing to the challenges posed by global warming and substantial energy consumption inherent in active cooling systems. However, achieving highly efficient radiative cooling devices capable of effective heat dissipation remains a challenge. Herein, by synergic optimization of the micro‐pyramid surface structures and 2D hexagonal boron nitride nanoplates (h‐BNNs) scattering fillers, pyramid textured photonic films with remarkable solar reflectivity of 98.5% and a mid‐infrared (MIR) emittance of 97.2% are presented. The h‐BNNs scattering filler with high thermal conductivity contributed to the enhanced through‐plane thermal conductivity up to 0.496 W m−1 K−1 and the in‐plane thermal conductivity of 3.175 W m−1 K−1. The photonic films exhibit an optimized effective radiative cooling power of 201.2 W m−2 at 40 °C under a solar irradiance of 900 W m−2 and a daily sub‐ambient cooling effect up to 11 °C. Even with simultaneous internal heat generation by a 10 W ceramic heater and external solar irradiance of 500 W m−2, a sub‐ambient cooling of 5 °C can be realized. The synergic matching strategy of high thermal conductivity scattering fillers and microstructured photonic surfaces holds promise for scalable sub‐ambient radiative cooling technologies. [ABSTRACT FROM AUTHOR]

Published
2024
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45. Prevalence, risk factors, and management of dementia and mild cognitive impairment in adults aged 60 years or older in China: a cross-sectional study

Author

Quan, Meina, Wang, Yan, Li, Wenwen, Cao, Shuman, Xu, Lingzhi, Han, Yue, Liang, Junhua, Qiao, Yuchen, Qin, Qi, Qiu, Qiongqiong, Jia, Longfei, Du, Yifeng, Chu, Lan, Zhang, Zhanjun, Li, Fangyu, Lyu, Diyang, Li, Yan, Zhu, Min, Jiao, Haishan, Song, Yang, Shi, Yuqing, Zhang, Heng, Gong, Min, Wei, Cuibai, Tang, Yi, Fang, Boyan, Guo, Dongmei, Wang, Fen, Zhou, Aihong, Chu, Changbiao, Zuo, Xiumei, Yu, Yueyi, Yuan, Quan, Wang, Wei, Li, Fang, Shi, Shengliang, Yang, Heyun, Zhou, Chunkui, Liao, Zhengluan, Lv, Yan, Li, Yang, Kan, Minchen, Zhao, Huiying, Wang, Shan, Yang, Shanshan, Li, Hao, Liu, Zhongling, Wang, Qi, Qin, Wei, and Jia, Jianping

Published
2020
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47. Motion Analysis of Impact Oscillators with Symmetrical and Asymmetrical Rigid Constraints in Two-Parameter Bifurcation Plane.

Author

Shi, Yuqing, Ma, Xinhao, Luo, Guanwei, and Lyu, Xiaohong

Subjects
*PERIODIC motion, *POINCARE maps (Mathematics), *MOTION analysis, *RELIABILITY in engineering, *ANALYTICAL solutions
Abstract

The excited, one-degree-of-freedom mechanical system with symmetrical and asymmetrical rigid constraints, is investigated in a two-parameter bifurcation plane ω–b. Decision conditions for the chattering-sticking motion of the system are given. The analytical solution of P(1, 1, 1) periodic motion and the linearization matrix of the Poincaré map are derived. The bifurcation characteristics of the P(1, 1, 1) periodic motion are analyzed theoretically by the position of the eigenvalue passing through the unit circle. The multiplicity and evolution of periodic motions of the system with symmetrical and asymmetrical constraints are explained by zones of their occurrence and stability in the plane of ω–b. Special attention is given to the complex dynamics near the singular points Si and the mutual transfer law of adjacent P(1,r,r) motion. The singular point is a codimensional-2 grazing bifurcation point related to P(1,r,r) type, and also a codimensional-2 flip-fold bifurcation point related to P(1,r + 1,r + 1) motion. The mutual evolution of adjacent P(1,r,r) motion is reversible only at the singular point Si. For symmetrical system, motions P(1,r + 1,r), P(2, 2r, 2r + 1), P(3, 3r + 1, 3r + 1) and their evolutions emerge in the ligulate zone. For an asymmetrical system, a cluster of abnormal basic groups gathers in the low-frequency. The symmetrical constraint model is a special case of the asymmetrical model. The obtained results have reference value for reducing component wear, noise, and improving the operational reliability of mechanical systems with clearance couplings. [ABSTRACT FROM AUTHOR]

Published
2024
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