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10 results on '"Chen, Qi-Xing"'

1. Preconditioned TBiCOR and TCORS Algorithms for Solving the Sylvester Tensor Equation

Author

Huang, Guang-Xin, Chen, Qi-Xing, and Yin, Feng

Subjects
Mathematics - Numerical Analysis, 65F10 (Primary), 65F50 (Secondary)
Abstract

In this paper, the preconditioned TBiCOR and TCORS methods are presented for solving the Sylvester tensor equation. A tensor Lanczos $\mathcal{L}$-Biorthogonalization algorithm (TLB) is derived for solving the Sylvester tensor equation. Two improved TLB methods are presented. One is the biconjugate $\mathcal{L}$-orthogonal residual algorithm in tensor form (TBiCOR), which implements the $LU$ decomposition for the triangular coefficient matrix derived by the TLB method. The other is the conjugate $\mathcal{L}$-orthogonal residual squared algorithm in tensor form (TCORS), which introduces a square operator to the residual of the TBiCOR algorithm. A preconditioner based on the nearest Kronecker product is used to accelerate the TBiCOR and TCORS algorithms, and we obtain the preconditioned TBiCOR algorithm (PTBiCOR) and preconditioned TCORS algorithm (PTCORS). The proposed algorithms are proved to be convergent within finite steps of iteration without roundoff errors. Several examples illustrate that the preconditioned TBiCOR and TCORS algorithms present excellent convergence., Comment: 22 pages, 3 figures, 30 references

Published
2021

2. The impact of the COVID-19 pandemic on the mental health of young people: A comparison between China and the United Kingdom

Author

Ming-Bo Liu, Géraldine Dufour, Zhuo-Er Sun, Julieta Galante, Chen-Qi Xing, Jing-Ye Zhan, and Li-Li Wu

Subjects
COVID-19, Mental health, Young people, Loneliness, Posttraumatic stress symptoms, Medicine (General), R5-920
Abstract

Abstracts: Purpose: As COVID-19 spreads globally and affects people's health, there are concerns that the pandemic and control policies may have psychological effects on young people (age from 17 to 35 years). This psychological impact might vary in different countries, and thus we compared the prevalence of self-reported psychological distress, loneliness and posttraumatic stress symptoms (PTSS) among young people in the United Kingdom (UK) and China at the beginning of the COVID-19 pandemic. Methods: Data of this study came from two sources. One source was the first wave of COVID-19 study in Understanding Society, a special wave of the UK household longitudinal study, which provided the high-quality, national-wide representative panel data. The sample comprised 1054 young people. The other source was an online survey on the mental health of 1003 young people from Shanghai, a highly developed area in China. The questionnaire included questions on the prevalence of common mental disorders (cut-off score ≥ 4), loneliness and potential PTSS (cut-off ≥ 33). Univariable analyses were conducted to test the differences in the self-reported prevalence of psychological distress and loneliness between the two groups. Multivariable logistic regression analyses were run to explore the predictors of psychological distress and loneliness among all the young people from England and Shanghai. Results: Among the samples with self-reported psychological distress, the UK sample accounted for 34.4% (n=1054) and the Chinese sample accounted for 14.1% (n=1003). The difference between the two groups was statistically significant (p

Published
2021
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5. Beneficial for mental health, exercise more or less?

Author

Wen-Jie Yan, Fan Zhang, Hui Ouyang, Chen-Qi Xing, and Wei-Zhi Liu

Subjects
General Earth and Planetary Sciences, General Environmental Science
Abstract

Regular physical activity may improve mental health during the pandemic by reducing inflammatory responses. However, overtraining or prolonged exercise training may adversely affect mental health.

Published
2022

6. Additional file 1 of Phenotype, genotype and long-term prognosis of 40 Chinese patients with isobutyryl-CoA dehydrogenase deficiency and a review of variant spectra in ACAD8

Author

Feng, Junqi, Yang, Chenxi, Zhu, Ling, Zhang, Yuchen, Zhao, Xiaoxu, Chen, Chi, Chen, Qi-xing, Shu, Qiang, Jiang, Pingping, and Tong, Fan

Abstract

Additional file 1: Table 1. redicted functional effects of 10 novel missense variants; Table 2. Clinical features and genotypes of 40 IBDD patients.

Published
2021
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9. Defensins and Sepsis

Author

Xie, Guo-Hao, Chen, Qi-Xing, Cheng, Bao-Li, and Fang, Xiang-Ming

Subjects
Article Subject, fungi
Abstract

Sepsis is a leading cause of mortality and morbidity in the critical illness. Multiple immune inflammatory processes take part in the pathogenesis of sepsis. Defensins are endogenous antimicrobial peptides with three disulphide bonds created by six cysteine residues. Besides the intrinsic microbicidal properties, defensins are active players which modulate both innate and adaptive immunity against various infections. Defensins can recruit neutrophils, enhance phagocytosis, chemoattract T cells and dendritic cells, promote complement activation, and induce IL-1β production and pyrotosis. Previous publications have documented that defensins play important roles in a series of immune inflammatory diseases including sepsis. This review aims to briefly summarize in vitro, in vivo, and genetic studies on defensins’ effects as well as corresponding mechanisms within sepsis and highlights their promising findings which may be potential targets in future therapies of sepsis.

Published
2014
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