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203 results on '"Guo, Xin-Yu"'

1. Energy Bands of Incommensurate Systems

Author

Guo, Xin-Yu, Chen, Jin-Rong, Zhao, Chen, Liang, Miao, Wu, Ying-Hai, Gao, Jin-Hua, and Xie, X. C.

Subjects
Condensed Matter - Mesoscale and Nanoscale Physics
Abstract

Energy band theory is a fundamental cornerstone of condensed matter physics. According to conventional wisdom, discrete translational symmetry is mandatory for defining energy bands. Here, we illustrate that, in fact, the concept of energy band can be generalized to incommensurate systems lacking such symmetry, thus transcending the traditional paradigm of energy band. The validity of our theory is verified by extensive numerical calculations in the celebrated Aubry-Andr\'e-Harper model and a two-dimensional incommensurate model of graphene. Building upon the proposed concept of incommensurate energy bands, we further develop a theory of angle-resolved photoemission spectroscopy (ARPES) for incommensurate systems, providing a clear physical picture for the incommensurate ARPES spectra. Our work establishes a comprehensive energy band theory for incommensurate systems., Comment: 8 pages, 3 figures

Published
2024

2. Energy Spectrum Theory of Incommensurate Systems

Author

He, Zhe, Guo, Xin-Yu, Ma, Zhen, and Gao, Jin-hua

Subjects
Condensed Matter - Mesoscale and Nanoscale Physics, Condensed Matter - Other Condensed Matter
Abstract

Due to the lack of the translational symmetry, calculating the energy spectrum of an incommensurate system has always been a theoretical challenge. Here, we propose a natural approach to generalize the energy band theory to the incommensurate systems without reliance on the commensurate approximation, thus providing a comprehensive energy spectrum theory of the incommensurate systems. Except for a truncation dependent weighting factor, the formulae of this theory are formally almost identical to that of the Bloch electrons, making it particularly suitable for complex incommensurate structures. To illustrate the application of this theory, we give three typical examples: one-dimensional bichromatic and trichromatic incommensurate potential model, as well as a moir\'{e} quasicrystal. Our theory establishes a fundamental framework for understanding the incommensurate systems., Comment: 7 pages, 3 figures

Published
2023
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14. Rapid Actuation for Soft Pneumatic Actuators Using Dynamic Instability Mechanism

Author

Guo, Xin-Yu, Li, Wen-Bo, Zhang, Wen-Ming, Goos, Gerhard, Founding Editor, Hartmanis, Juris, Founding Editor, Bertino, Elisa, Editorial Board Member, Gao, Wen, Editorial Board Member, Steffen, Bernhard, Editorial Board Member, Woeginger, Gerhard, Editorial Board Member, Yung, Moti, Editorial Board Member, Chan, Chee Seng, editor, Liu, Hong, editor, Zhu, Xiangyang, editor, Lim, Chern Hong, editor, Liu, Xinjun, editor, Liu, Lianqing, editor, and Goh, Kam Meng, editor

Published
2020
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17. myofibroblasts mediate immune suppression in malignant transformation of squamous cell carcinoma

Author

Hu, Simeng, Lu, Huanzi, Xie, Wenqiang, Wang, Dikan, Shan, Zhongyan, Xing, Xudong, Wang, Xiang-Ming, Fang, Juan, Dong, Wei, Dai, Wenxiao, Guo, Junyi, Zhang, Yanshu, Wen, Shuqiong, Guo, Xin-Yu, Chen, Qianming, Bai, Fan, and Wang, Zhi

Subjects
RNA sequencing -- Analysis, Immunotherapy -- Patient outcomes, Mouth cancer -- Diagnosis -- Care and treatment, Health care industry
Abstract

Characterization of the dynamic change in the immunological landscape during malignant transformation from precancerous lesions to cancerous lesions in squamous cell carcinoma (SCC) is critical for the application of immunotherapy. Here, we performed single-cell RNA-Seq (scRNA-Seq) of 131,702 cells from 13 cancerous tissues of oral squamous cell carcinoma (OSCC), 3 samples of precancerous oral leukoplakia, and 8 adjacent normal samples. We found that tumor-infiltrating [CD4.sup.+] and [CD8.sup.+] T cells were functionally inhibited by immunosuppressive ligands expressed on various types of myeloid cells or neutrophils in the process of oral carcinogenesis. Notably, we identified a subset of myofibroblasts that exclusively expressed tryptophan 2,3-dioxygenase (TDO2). These [TDO2.sup.+] myofibroblasts were located distally from tumor nests, and both [CD4.sup.+] and [CD8.sup.+] T cells were enriched around them. Functional experiments revealed that [TDO2.sup.+] myofibroblasts were more likely to possess the ability for chemotaxis toward T cells but induced the transformation of [CD4.sup.+] T cells into Tregs and caused [CD8.sup.+] T cell dysfunction. We further showed that use of the TDO2 inhibitor LM10 attenuated the inhibitory states of T cells, restored the T cell antitumor response, and prevented the progression of OSCC malignant transformation in murine models. Our study reveals a multistep transcriptomic landscape of OSCC and demonstrates that [TDO2.sup.+] myofibroblasts are potential targets for immunotherapy., Introduction Oral squamous cell carcinoma (OSCC), a malignancy that occurs in the epithelium of the oral cavity, is the predominant type of head and neck squamous cell carcinoma (HNSCC). It [...]

Published
2022
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30. The crystal structure of 1,3-bis(4-(methoxycarbonyl)benzyl)-2-methyl-1H-benzo[d]imidazol-3-ium bromide, C26H25BrN2O4

Author

Cai Bin, Fu Chun-Yan, Guo Xin-Yu, and Wang Ying

Subjects
1960463, Physics, QC1-999, Crystallography, QD901-999
Abstract

C26H25BrN2O4, triclinic, P1̄ (no. 2), a = 9.4202(5) Å, b = 9.7871(5) Å, c = 15.0135(9) Å, α = 106.775(3)°, β = 92.534(3)°, γ = 117.424(3)°, V = 1150.52(11) Å3, Z = 2, Rgt(F) = 0.0316, wRref(F2) = 0.0671, T = 150(2) K.

Published
2020
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32. TDO2+ myofibroblasts mediate immune suppression in malignant transformation of squamous cell carcinoma

Author

Hu, Simeng, primary, Lu, Huanzi, additional, Xie, Wenqiang, additional, Wang, Dikan, additional, Shan, Zhongyan, additional, Xing, Xudong, additional, Wang, Xiang-Ming, additional, Fang, Juan, additional, Dong, Wei, additional, Dai, Wenxiao, additional, Guo, Junyi, additional, Zhang, Yanshu, additional, Wen, Shuqiong, additional, Guo, Xin-Yu, additional, Chen, Qianming, additional, Bai, Fan, additional, and Wang, Zhi, additional

Published
2022
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