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772 results on '"Liu, Zhi-Yong"'

3. Atlas of dynamic spectra of fast radio burst FRB 20201124A

Author

Wang, Bo-Jun, Xu, Heng, Jiang, Jin-Chen, Xu, Jiang-Wei, Niu, Jia-Rui, Chen, Ping, Lee, Ke-Jia, Zhang, Bing, Zhu, Wei-Wei, Dong, Su-Bo, Zhang, Chun-Feng, Fu, Hai, Zhou, De-Jiang, Zhang, Yong-Kun, Wang, Pei, Feng, Yi, Li, Ye, Li, Dong-Zi, Lu, Wen-Bin, Yang, Yuan-Pei, Caballero, R. N., Cai, Ce, Chen, Mao-Zheng, Dai, Zi-Gao, Esamdin, A., Gan, Heng-Qian, Han, Jin-Lin, Hao, Long-Fei, Huang, Yu-Xiang, Jiang, Peng, Li, Cheng-Kui, Li, Di, Li, Hui, Li, Xin-Qiao, Li, Zhi-Xuan, Liu, Zhi-Yong, Luo, Rui, Men, Yun-Peng, Niu, Chen-Hui, Peng, Wen-Xi, Qian, Lei, Song, Li-Ming, Sun, Jing-Hai, Wang, Fa-Yin, Wang, Min, Wang, Na, Wang, Wei-Yang, Wu, Xue-Feng, Xiao, Shuo, Xiong, Shao-Lin, Xu, Yong-Hua, Xu, Ren-Xin, Yang, Jun, Yang, Xuan, Yao, Rui, Yi, Qi-Bin, Yue, You-Ling, Yu, Dong-Jun, Yu, Wen-Fei, Yuan, Jian-Ping, Zhang, Bin-Bin, Zhang, Song-Bo, Zhang, Shuang-Nan, Zhao, Yi, Zheng, Wei-Kang, Zhu, Yan, and Zou, Jin-Hang

Subjects
Astrophysics - High Energy Astrophysical Phenomena
Abstract

Fast radio bursts (FRBs) are highly dispersed millisecond-duration radio bursts, of which the physical origin is still not fully understood. FRB 20201124A is one of the most actively repeating FRBs. In this paper, we present the collection of 1863 burst dynamic spectra of FRB 20201124A measured with the Five-hundred-meter Aperture Spherical radio Telescope (FAST). The current collection, taken from the observation during the FRB active phase from April to June 2021, is the largest burst sample detected in any FRB so far. The standard PSRFITs format is adopted, including dynamic spectra of the burst, and the time information of the dynamic spectra, in addition, mask files help readers to identify the pulse positions are also provided.

Published
2023
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10. Clinical characteristic for stroke in plateau area with altitude of 4000 meters above: 103 cases report

Author

HE Zhong‑zheng, LI Rui‑qian, LIU Zhi‑yong, LONG Qian‑fa, YUE Shu‑yuan, and YANG Yan‑ping

Subjects
stroke, altitude, risk factors, logistic models, Neurology. Diseases of the nervous system, RC346-429
Abstract

Objective To summarize the clinical characteristic of stroke in the plateau area with altitude of 4000 m above, and to screen the risk factors of hemorrhagic stroke. Methods The clinical data of 103 stroke patients (including 71 hemorrhagic stroke and 32 ischemic stroke) admitted to Ngari Prefecture People's Hospital of Tibet Autonomous Region from January 2017 to December 2018 were retrospectively analyzed, and the clinical characteristic of hemorrhagic stroke and ischemic stroke were compared. Univariate and multivariate Logistic regression analyses were used to screen the risk factors of hemorrhagic stroke. Results The age of hemorrhagic stroke patients was lower than that of ischemic stroke patients [(57.48 ± 10.81) years vs. (64.03 ± 10.96) years; t = 2.836, P = 0.006], and the systolic blood pressure at admission [(171.92 ± 28.95) mm Hg vs. (141.81 ± 23.24) mm Hg; t = 5.174, P = 0.000], diastolic blood pressure [(107.58 ± 18.76) mm Hg vs. (93.44 ± 14.94) mm Hg; t = 3.757, P = 0.000], hemoglobin [(189.54 ± 28.12) g/L vs. (165.35 ± 25.42) g/L; t = 4.111, P = 0.000] and total cholesterol [(4.60 ± 0.88) mmol/L vs. (4.04 ± 0.82) mmol/L; t = 3.118, P = 0.002] were higher than those of ischemic stroke patients. Logistic regression analysis showed that systolic blood pressure on admission (OR = 1.048, 95%CI: 1.024-1.073; P = 0.000) and hemoglobin (OR = 1.043, 95%CI: 1.015-1.072; P = 0.002) elevation were risk factors of hemorrhagic stroke. Conclusions Hemorrhagic stroke is the main type of stroke in the plateau area with altitude of 4000 m above. Patients with high systolic blood pressure on admission and hemoglobin are more likely to have hemorrhagic stroke.

Published
2023
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40. Multi-frequency Radio Profiles of PSR B1133+16: radiation location and particle energy

Author

Lu, Ji-Guang, Du, Yuan-Jie, Hao, Long-Fei, Yan, Zhen, Liu, Zhi-Yong, Lee, Ke-Jia, Qiao, Guo-Jun, Shang, Lun-Hua, Wang, Min, Xu, Ren-Xin, Yue, You-Ling, and Zhi, Qi-Jun

Subjects
Astrophysics - High Energy Astrophysical Phenomena
Abstract

The pulse profile of PSR B1133+16 is usually regarded as a conal-double structure. However, its multifrequency profiles cannot simply be fitted with two Gaussian functions, and a third component is always needed to fit the bridge region (between two peaks). This would introduce additional, redundant parameters. In this paper, through a comparison of five fitting functions (Gaussian, von Mises, hyperbolic secant, square hyperbolic secant, and Lorentz), it is found that the square hyperbolic secant function can best reproduce the profile, yielding an improved fit. Moreover, a symmetric 2D radiation beam function, instead of a simple 1D Gaussian function, is used to fit the profile. Each profile with either well-resolved or not-so-well-resolved peaks could be fitted adequately using this beam function, and the bridge emission between the two peaks does not need to be a new component. Adopting inclination and impact angles based on polarization measurements, the opening angle ({\theta}_{\mu}0) of the radiation beam in a certain frequency band is derived from beam-function fitting. The corresponding radiation altitudes are then calculated. Based on multi-frequency profiles, we also computed the Lorentz factors of the particles and their dispersion at those locations in both the curvature-radiation (CR) and inverse-Compton-scattering (ICS) models. We found that the Lorentz factors of the particles decrease rapidly as the radiation altitude increases. Besides, the radiation prefers to be generated in annular region rather than core region, and this needs further validation., Comment: 13 pages, 18 figures, ApJ, 816, 76

Published
2015
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42. A Weighted Common Subgraph Matching Algorithm

Author

Yang, Xu, Qiao, Hong, and Liu, Zhi-Yong

Subjects
Computer Science - Data Structures and Algorithms, Computer Science - Computer Vision and Pattern Recognition
Abstract

We propose a weighted common subgraph (WCS) matching algorithm to find the most similar subgraphs in two labeled weighted graphs. WCS matching, as a natural generalization of the equal-sized graph matching or subgraph matching, finds wide applications in many computer vision and machine learning tasks. In this paper, the WCS matching is first formulated as a combinatorial optimization problem over the set of partial permutation matrices. Then it is approximately solved by a recently proposed combinatorial optimization framework - Graduated NonConvexity and Concavity Procedure (GNCCP). Experimental comparisons on both synthetic graphs and real world images validate its robustness against noise level, problem size, outlier number, and edge density., Comment: 6 pages, 5 figures, the second round revision in IEEE TNNLS

Published
2014

47. Multi-Omics profiling identifies aldehyde dehydrogenase 2 as a critical mediator in the crosstalk between Treg-mediated immunosuppression microenvironment and hepatocellular carcinoma

Author

Liu, Zhi-Yong, primary, Lin, Xia-Hui, additional, Guo, Hong-Ying, additional, Shi, Xuan, additional, Zhang, Dan-Ying, additional, Sun, Jia-Lei, additional, Zhang, Guang-Cong, additional, Xu, Ru-Chen, additional, Wang, Fu, additional, Yu, Xiang-Nan, additional, Wang, Dou, additional, Weng, Shu-Qiang, additional, Shen, Xi-Zhong, additional, Liu, Tao-Tao, additional, Dong, Ling, additional, and Zhu, Ji-Min, additional

Published
2024
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