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3,151 results on '"Luo, Zhong"'

1. Superradiant instability of area quantized Kerr black hole with discrete reflectivity

Author

Luo, Zhong-Hao and Zhang, Yun-Long

Subjects
General Relativity and Quantum Cosmology, Astrophysics - High Energy Astrophysical Phenomena, High Energy Physics - Phenomenology, High Energy Physics - Theory
Abstract

Ultralight bosons can condense to form the so-called bosonic clouds around spinning black holes by superradiance instability. When quantum effects are taken into account, the classical black holes were replaced by exotic compact objects including area quantized black holes. In this work, we consider the superradiant instabilities of massive scalar fields around area quantized Kerr black hole. We introduce the reflectivity of area quantized black hole possesses the distinct discrete feature, and the scalar fields have the superradiant modes solution only within the specific mass range. In addition, the area quantization may terminate the superradiance when the black hole spins down, or even suppress the formation of the bosionic cloud., Comment: 10 pages, 5 figures

Published
2024

10. Fetal overgrowth and weight trajectories during infancy and adiposity in early childhood

Author

Tao, Min-Yi, Liu, Xin, Chen, Zi-Lin, Yang, Meng-Nan, Xu, Ya-Jie, He, Hua, Fang, Fang, Chen, Qian, Mao, Xuan-Xia, Zhang, Jun, Ouyang, Fengxiu, Shen, Xiu-Hua, Li, Fei, Luo, Zhong-Cheng, Shen, Xiaoming, Huang, Hong, Sun, Kun, Zhang, Jun, Wang, Weiye, Xu, Weiping, Ouyang, Fengxiu, Li, Fei, Huang, Yin, Zhang, Jinsong, Yan, Chonghuai, Shen, Lisong, Bao, Yixiao, Tian, Ying, Chen, Weiwei, Zhang, Huijuan, Tong, Chuanliang, Xu, Jian, Zhang, Lin, Zhang, Yiwen, Jiang, Fang, Yu, Xiaodan, Yu, Guangjun, Chen, Jinjin, Zhang, Yu, Li, Xiaotian, Cheng, Haidong, Zhang, Qinying, Duan, Tao, Hua, Jing, and Peng, Hua

Published
2024
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14. Dynamics Analysis and Optimization of a Simplified Axisymmetric Vectoring Nozzle Rigid Flexible Coupling Mechanical System with Clearance Joints

Author

Wang, Haofeng, Wang, Xiaoyu, Xu, Chunyang, Luo, Zhong, Han, Qingkai, Chaari, Fakher, Series Editor, Gherardini, Francesco, Series Editor, Ivanov, Vitalii, Series Editor, Haddar, Mohamed, Series Editor, Cavas-Martínez, Francisco, Editorial Board Member, di Mare, Francesca, Editorial Board Member, Kwon, Young W., Editorial Board Member, Trojanowska, Justyna, Editorial Board Member, Xu, Jinyang, Editorial Board Member, Rui, Xiaoting, editor, and Liu, Caishan, editor

Published
2024
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15. Computation of Components System Stiffness for Variable Stator Vane Mechanism

Author

Chang, Jing, Luo, Zhong, Ceccarelli, Marco, Series Editor, Agrawal, Sunil K., Advisory Editor, Corves, Burkhard, Advisory Editor, Glazunov, Victor, Advisory Editor, Hernández, Alfonso, Advisory Editor, Huang, Tian, Advisory Editor, Jauregui Correa, Juan Carlos, Advisory Editor, Takeda, Yukio, Advisory Editor, Chu, Fulei, editor, and Qin, Zhaoye, editor

Published
2024
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16. Dynamic Behaviors of a Bolted Joint Rotor System Considering the Contact State at Mating Interface

Author

Li, Yuqi, Zhu, Zhimin, Luo, Zhong, Wen, Chuanmei, Li, Lei, Jin, Long, Ceccarelli, Marco, Series Editor, Agrawal, Sunil K., Advisory Editor, Corves, Burkhard, Advisory Editor, Glazunov, Victor, Advisory Editor, Hernández, Alfonso, Advisory Editor, Huang, Tian, Advisory Editor, Jauregui Correa, Juan Carlos, Advisory Editor, Takeda, Yukio, Advisory Editor, Chu, Fulei, editor, and Qin, Zhaoye, editor

Published
2024
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28. Dynamic crystallography reveals spontaneous anisotropy in cubic GeTe

Author

Kimber, Simon A. J., Zhang, Jiayong, Liang, Charles H., Guzman-Verri, Gian G., Littlewood, Peter B., Cheng, Yongqiang, Abernathy, Douglas L., Hudspeth, Jessica M., Luo, Zhong-Zhen, Kanatzidis, Mercouri G., Chatterji, Tapan, Ramirez-Cuesta, Anibal J., and Billinge, Simon J. L.

Subjects
Condensed Matter - Materials Science
Abstract

Cubic energy materials such as thermoelectrics or hybrid perovskite materials are often understood to be highly disordered. In GeTe and related IV-VI compounds, this is thought to provide the low thermal conductivities needed for thermoelectric applications. Since conventional crystallography cannot distinguish between static disorder and atomic motions, we develop the energy-resolved variable-shutter pair distribution function technique. This collects structural snapshots with varying exposure times, on timescales relevant for atomic motions. In disagreement with previous interpretations, we find the time-averaged structure of GeTe to be crystalline at all temperatures, but with anisotropic anharmonic dynamics at higher temperatures that resemble static disorder at fast shutter speeds, with correlated ferroelectric fluctuations along the $<$100$>$c direction. We show that this anisotropy naturally emerges from a Ginzburg-Landau model that couples polarization fluctuations through long-range elastic interactions. By accessing time-dependent atomic correlations in energy materials, we resolve the long-standing disagreement between local and average structure probes, and show that spontaneous anisotropy is ubiquitous in cubic IV-VI materials., Comment: Published version, substantial changes, many references removed due to journal limits :-( Please see the supporting information online. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format (see conditions)

Published
2022
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47. A Faster and More Robust Momentum Observer for Robot Collision Detection Based on Loop Shaping Techniques

Author

Duan, Zhongkai, Luo, Zhong, Liu, Yuliang, Wu, Yuqiang, Chen, Wenjie, Goos, Gerhard, Founding Editor, Hartmanis, Juris, Founding Editor, Bertino, Elisa, Editorial Board Member, Gao, Wen, Editorial Board Member, Steffen, Bernhard, Editorial Board Member, Yung, Moti, Editorial Board Member, Yang, Huayong, editor, Liu, Honghai, editor, Zou, Jun, editor, Yin, Zhouping, editor, Liu, Lianqing, editor, Yang, Geng, editor, Ouyang, Xiaoping, editor, and Wang, Zhiyong, editor

Published
2023
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48. Lightweight Design Method of Stacker Column Structure Based on Multi-parameter Sensitivity Analysis

Author

Li, Yuxin, Luo, Zhong, Chen, Wenjie, Wu, Wenjing, Jin, Mingliang, Shi, Baolong, Wang, Pengfei, Goos, Gerhard, Founding Editor, Hartmanis, Juris, Founding Editor, Bertino, Elisa, Editorial Board Member, Gao, Wen, Editorial Board Member, Steffen, Bernhard, Editorial Board Member, Yung, Moti, Editorial Board Member, Yang, Huayong, editor, Liu, Honghai, editor, Zou, Jun, editor, Yin, Zhouping, editor, Liu, Lianqing, editor, Yang, Geng, editor, Ouyang, Xiaoping, editor, and Wang, Zhiyong, editor

Published
2023
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49. Dynamic Analysis of Under-Actuated Thrust Reverse Mechanism Considering Joint Clearance

Author

Wang, Xiaoyu, Zhao, Jingchao, Song, Huitao, Luo, Zhong, Han, Qingkai, Chaari, Fakher, Series Editor, Gherardini, Francesco, Series Editor, Ivanov, Vitalii, Series Editor, Cavas-Martínez, Francisco, Editorial Board Member, di Mare, Francesca, Editorial Board Member, Haddar, Mohamed, Editorial Board Member, Kwon, Young W., Editorial Board Member, Trojanowska, Justyna, Editorial Board Member, Xu, Jinyang, Editorial Board Member, and Liu, Xinjun, editor

Published
2023
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50. Dynamics Analysis of Simplified Axisymmetric Vectoring Exhaust Nozzle Mechanical System with Joint Clearance and Flexible Component

Author

Wang, Xiaoyu, Wang, Haofeng, Xu, Chunyang, Luo, Zhong, Han, Qingkai, Chaari, Fakher, Series Editor, Gherardini, Francesco, Series Editor, Ivanov, Vitalii, Series Editor, Cavas-Martínez, Francisco, Editorial Board Member, di Mare, Francesca, Editorial Board Member, Haddar, Mohamed, Editorial Board Member, Kwon, Young W., Editorial Board Member, Trojanowska, Justyna, Editorial Board Member, Xu, Jinyang, Editorial Board Member, and Liu, Xinjun, editor

Published
2023
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