Search

Your search keyword '"Chen, Shuwen"' showing total 622 results
Start Over Author "Chen, Shuwen"
622 results on '"Chen, Shuwen"'

1. Streets-Tian Conjecture holds for 2-step solvmanifolds

Author

Chen, Shuwen and Zheng, Fangyang

Subjects
Mathematics - Differential Geometry, 53C55
Abstract

A Hermitian-symplectic metric is a Hermitian metric whose K\"ahler form is given by the $(1,1)$-part of a closed $2$-form. Streets-Tian Conjecture states that a compact complex manifold admitting a Hermitian-symplectic metric must be K\"ahlerian (i.e., admitting a K\"ahler metric). The conjecture is known to be true in dimension $2$ but is still open in dimensions $3$ or higher. In this article, we confirm the conjecture for all 2-step solvmanifolds, namely, compact quotients of 2-step solvable Lie groups by discrete subgroups. In the proofs, we adopted a method of using special {\em non-unitary} frames, which enabled us to squeeze out some hidden symmetries to make the proof go through. Hopefully the technique could be further applied., Comment: 15 pages. arXiv admin note: text overlap with arXiv:2409.09425

Published
2024

2. Bismut torsion parallel metrics with constant holomorphic sectional curvature

Author

Chen, Shuwen and Zheng, Fangyang

Subjects
Mathematics - Differential Geometry, 53C55
Abstract

An old conjecture in non-K\"ahler geometry states that, if a compact Hermitian manifold has constant holomorphic sectional curvature, then the metric must be K\"ahler (when the constant is non-zero) or Chern flat (when the constant is zero). It is known to be true in complex dimension $2$ by the work of Balas and Gauduchon in 1985 (when the constant is negative or zero) and Apostolov, Davidov and Muskarov in 1996 (when the constant is positive). In dimension $3$ or higher, the conjecture is only known in some special cases, such as the locally conformally K\"ahler case (when the constant is negative or zero) by the work of Chen, Chen and Nie, or for complex nilmanifolds with nilpotent $J$ by the work of Li and the second named author. In this note, we confirm the above conjecture for all non-balanced Bismut torsion parallel (BTP) manifolds. Here the BTP condition means that the Bismut connection has parallel torsion. In particular, the conjecture is valid for all Vaisman manifolds., Comment: 12 pages

Published
2024

6. Establishment and evaluation of induced model of meibomian gland dysfunction in rats through eyeliner tattoo

Author

Hu Fen, Wang He, Zhao Kai, Chen Shuwen, Lu Qiuchen, Liu Qian, and Li Mingxin

Subjects
eyeliner tattoo, meibomian gland dysfunction, dry eye, animal model, Ophthalmology, RE1-994
Abstract

AIM:To establish a model of meibomian gland dysfunction in rats induced by eyeliner tattoo and investigate its potential mechanisms.METHODS:A total of 40 SD rats were selected, with 30 randomly chosen to have eyeliner tattoo applied their right eyes and designated as the eyeliner group. The remaining 10 rats were not given any treatment and served as the normal group. The corneal morphology of both groups was observed using a slit lamp at 1, 2, and 4 wk after establishment, and the tear film break-up time(BUT), Schirmer I test(SIt), corneal fluorescein staining score, and corneal irregularity score were calculated. The corneal Placido rings were examined using an ocular surface analyzer, and the corneal tissue structures of both groups were observed under a confocal microscope. After 4 wk and completion of clinical indicator recording, the eyeballs and upper and lower eyelid tissues were taken for pathological examination. The meibomian gland structures were observed through HE staining, the conjunctival goblet cells were observed using PAS staining, and the lipid droplets were observed with ORO staining.RESULTS:The slit lamp examination results showed that the eyeliner group rats exhibited in situ black pigmentation in the eyelids, with no eyelid deformation or scarring. The corneal epithelium was rough, with positive fluorescein staining, presenting as spotty staining that worsened over time. Compared with the normal group, the BUT was significantly shortened, tear secretion volume was significantly decreased, and the corneal fluorescein staining score and corneal irregularity score were significantly increased at 1, 2, and 4 wk after modeling in the eyeliner group(all P

Published
2024
Full Text
View/download PDF

7. Enhancing Retrieval-Augmented Generation Models with Knowledge Graphs: Innovative Practices Through a Dual-Pathway Approach

Author

Xu, Sheng, Chen, Mike, Chen, Shuwen, Goos, Gerhard, Series 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, Huang, De-Shuang, editor, Si, Zhanjun, editor, and Chen, Wei, editor

Published
2024
Full Text
View/download PDF

8. Stationary Wavelet Entropy and Cat Swarm Optimization to Detect COVID-19

Author

Wu, Meng, Chen, Shuwen, Wang, Jiaji, Wang, Shuihua, Gorriz, Juan Manuel, Zhang, Yudong, Goos, Gerhard, Series Editor, Hartmanis, Juris, Founding Editor, van Leeuwen, Jan, Series Editor, Hutchison, David, Editorial Board Member, Kanade, Takeo, Editorial Board Member, Kittler, Josef, Editorial Board Member, Kleinberg, Jon M., Editorial Board Member, Kobsa, Alfred, Series Editor, Mattern, Friedemann, Editorial Board Member, Mitchell, John C., Editorial Board Member, Naor, Moni, Editorial Board Member, Nierstrasz, Oscar, Series Editor, Pandu Rangan, C., Editorial Board Member, Sudan, Madhu, Series Editor, Terzopoulos, Demetri, Editorial Board Member, Tygar, Doug, Editorial Board Member, Weikum, Gerhard, Series Editor, Vardi, Moshe Y, Series Editor, Bertino, Elisa, Editorial Board Member, Gao, Wen, Editorial Board Member, Steffen, Bernhard, Editorial Board Member, Yung, Moti, Editorial Board Member, Woeginger, Gerhard, Editorial Board Member, Ferrández Vicente, José Manuel, editor, Val Calvo, Mikel, editor, and Adeli, Hojjat, editor

Published
2024
Full Text
View/download PDF

10. Machine Learning for Image Denoising: A Review

Author

Wu, Meng, Wang, Shuihua, Chen, Shuwen, Zhang, Yudong, Angrisani, Leopoldo, Series Editor, Arteaga, Marco, Series Editor, Chakraborty, Samarjit, Series Editor, Chen, Jiming, Series Editor, Chen, Shanben, Series Editor, Chen, Tan Kay, Series Editor, Dillmann, Rüdiger, Series Editor, Duan, Haibin, Series Editor, Ferrari, Gianluigi, Series Editor, Ferre, Manuel, Series Editor, Jabbari, Faryar, Series Editor, Jia, Limin, Series Editor, Kacprzyk, Janusz, Series Editor, Khamis, Alaa, Series Editor, Kroeger, Torsten, Series Editor, Li, Yong, Series Editor, Liang, Qilian, Series Editor, Martín, Ferran, Series Editor, Ming, Tan Cher, Series Editor, Minker, Wolfgang, Series Editor, Misra, Pradeep, Series Editor, Mukhopadhyay, Subhas, Series Editor, Ning, Cun-Zheng, Series Editor, Nishida, Toyoaki, Series Editor, Oneto, Luca, Series Editor, Panigrahi, Bijaya Ketan, Series Editor, Pascucci, Federica, Series Editor, Qin, Yong, Series Editor, Seng, Gan Woon, Series Editor, Speidel, Joachim, Series Editor, Veiga, Germano, Series Editor, Wu, Haitao, Series Editor, Zamboni, Walter, Series Editor, Tan, Kay Chen, Series Editor, Su, Ruidan, editor, Zhang, Yu-Dong, editor, and Frangi, Alejandro F., editor

Published
2024
Full Text
View/download PDF

11. AlexNet for Image-Based COVID-19 Diagnosis

Author

Tang, Min, Peng, Yibin, Wang, Shuihua, Chen, Shuwen, Zhang, Yudong, Angrisani, Leopoldo, Series Editor, Arteaga, Marco, Series Editor, Chakraborty, Samarjit, Series Editor, Chen, Jiming, Series Editor, Chen, Shanben, Series Editor, Chen, Tan Kay, Series Editor, Dillmann, Rüdiger, Series Editor, Duan, Haibin, Series Editor, Ferrari, Gianluigi, Series Editor, Ferre, Manuel, Series Editor, Jabbari, Faryar, Series Editor, Jia, Limin, Series Editor, Kacprzyk, Janusz, Series Editor, Khamis, Alaa, Series Editor, Kroeger, Torsten, Series Editor, Li, Yong, Series Editor, Liang, Qilian, Series Editor, Martín, Ferran, Series Editor, Ming, Tan Cher, Series Editor, Minker, Wolfgang, Series Editor, Misra, Pradeep, Series Editor, Mukhopadhyay, Subhas, Series Editor, Ning, Cun-Zheng, Series Editor, Nishida, Toyoaki, Series Editor, Oneto, Luca, Series Editor, Panigrahi, Bijaya Ketan, Series Editor, Pascucci, Federica, Series Editor, Qin, Yong, Series Editor, Seng, Gan Woon, Series Editor, Speidel, Joachim, Series Editor, Veiga, Germano, Series Editor, Wu, Haitao, Series Editor, Zamboni, Walter, Series Editor, Tan, Kay Chen, Series Editor, Su, Ruidan, editor, Zhang, Yu-Dong, editor, and Frangi, Alejandro F., editor

Published
2024
Full Text
View/download PDF

12. Advance of Thyroid Nodule Ultrasound Diagnosis Based on Deep Learning

Author

Wan, Huiling, Chen, Shuwen, Ni, Yiyang, Qi, Shaojia, Qu, Hui, 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, and Li, Shaofan, editor

Published
2024
Full Text
View/download PDF

13. A Survey of Internet of Things in Healthcare

Author

Chen, Shuwen, Wang, Jiaji, Song, Zhijun, 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, and Li, Shaofan, editor

Published
2024
Full Text
View/download PDF

15. A Comparative Study on Image Segmentation Models in COVID-19 Diagnosis

Author

Xu, Sheng, Chen, Shuwen, Chen, Mike, 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, and Li, Shaofan, editor

Published
2024
Full Text
View/download PDF

21. On Strominger space forms

Author

Chen, Shuwen and Zheng, Fangyang

Subjects
Mathematics - Differential Geometry, 53C55
Abstract

In this article, we propose the following conjecture: if the Strominger connection of a compact Hermitian manifold has constant non-zero holomorphic sectional curvature, then the Hermitian metric must be K\"ahler. The main result of this article is to confirm the conjecture in dimension $2$. We also verify the conjecture in higher dimensions in a couple of special situations., Comment: Added the missing term in formula (32) (the ninth parenthesis on the right hand side), which resulted in changes in formula (33), (34) and (37, and a couple of sentences after (37) to make the argument go through. The paper will appear in Journal of Geometric Analysis

Published
2021

29. Research on the typical fault modes of multi-category aviation transformer rectifier units

Author

CHEN Shuwen and YU Nalun

Subjects
aviation transformer rectifier units, failure mode and effects analysis, fault tree analysis, simulink sim-ulation, fault modes, Motor vehicles. Aeronautics. Astronautics, TL1-4050
Abstract

With the development of multi-electric aircraft, the researches on the structure improvement and fault di-agnosis of aviation transformer rectifier units (TRUs) are increasing, but research on the characteristics and effects of typical fault modes of different types of TRUs is lacked. Based on the analysis of TRUs structures, the failure mode and effects analysis (FMEA) and fault tree analysis (FTA) of TRUs are studied to determine typical failure modes of TRUs. Then, simulation models of various TRUs are established by Simulink, and the electrical signal characteristics of TRUs under different fault modes are analyzed and compared; the detailed fault modes of 8 TRUs are defined. The results show that the hard faults of TRUs have great impact on the system, and the high-pulse TRUs have better stability under fault modes and lower reliability.

Published
2023
Full Text
View/download PDF

36. Transcriptome-wide identification of walnut PP2C family genes in response to external stimulus

Author

Chen Sisi, Deng Jieru, Cheng Peidong, Zhang Zhaolong, Wang Yihang, Chen Shuwen, Tang Yan, Wang Tianyu, and Yang Guiyan

Subjects
Juglans regia, Protein phosphatase 2C, Bioinformatics, Expression analysis, Biotechnology, TP248.13-248.65, Genetics, QH426-470
Abstract

Abstract Walnut is an important economic tree species while confronting with global environmental stress, resulting in decline in quality and yield. Therefore, it is urgent to elucidate the molecular mechanism for the regulation of walnut response to adversity. The protein phosphatase 2C (PP2C) gene family participates in cellular processes in eukaryotes through reversible phosphorylation of proteins and signal transduction regulation. However, the stress response function of PP2C genes was far to be clarified. Therefore, to understand the stress response mechanism of walnut tree, in this study, a total of 41 PP2C genes with complete ORFs were identified from Juglans regia, whose basic bio-information and expression patterns in response to multiple stresses and ABA were confirmed. The results showed that the ORFs of JrPP2Cs were 495 ~ 3231 bp in length, the predicted JrPP2C proteins contained 164 to 1076 amino acids and the molecular weights were 18,581.96 ~ 118,853.34 Da, the pI was 4.55 ~ 9.58. These JrPP2C genes were unevenly distributed on 14 chromosomes, among which Chr11 and Chr13 contained the most genes. Phylogenetic analysis found that these JrPP2C proteins were classed into 9 subfamilies, among which group F covered most JrPP2Cs. The JrPP2Cs in the same subfamily exhibited similarities in the composition of conserved domains, amino acid sequences of motifs and exon/intron organization in DNA sequences. Each JrPP2C includes 4 ~ 10 motifs and each motif contained 15 ~ 37 amino acids. Among the motifs, motif1, motif2, motif3 and motif8 were most abundant. Most of the JrPP2C genes diversely response to osmotic, cadmium, and Colletotrichum gloeosporioide stress as well as ABA treatments, among which JrPP2C28, JrPP2C17, JrPP2C09, JrPP2C36 were more obvious and deserves further attention. All these results indicated that JrPP2C genes play potential vital roles in plant response to multiple stimulus, and are possibly involved in ABA-dependent signaling pathway.

Published
2022
Full Text
View/download PDF

45. What R Mandarin Chinese /ɹ/s? – acoustic and articulatory features of Mandarin Chinese rhotics.

Author

Chen, Shuwen, Whalen, Douglas H., and Mok, Peggy Pik Ki

Abstract

Rhotic sounds are well known for their considerable phonetic variation within and across languages and their complexity in speech production. Although rhotics in many languages have been examined and documented, the phonetic features of Mandarin rhotics remain unclear, and debates about the prevocalic rhotic (the syllable-onset rhotic) persist. This paper extends the investigation of rhotic sounds by examining the articulatory and acoustic features of Mandarin Chinese rhotics in prevocalic, syllabic (the rhotacized vowel [ɚ]), and postvocalic (r-suffix) positions. Eighteen speakers from Northern China were recorded using ultrasound imaging. Results showed that Mandarin syllabic and postvocalic rhotics can be articulated with various tongue shapes, including tongue-tip-up retroflex and tongue-tip-down bunched shapes. Different tongue shapes have no significant acoustic differences in the first three formants, demonstrating a many-to-one articulation-acoustics relationship. The prevocalic rhotics in our data were found to be articulated only with bunched tongue shapes, and were sometimes produced with frication noise at the start. In general, rhotics in all syllable positions are characterized by a close F2 and F3, though the prevocalic rhotic has a higher F2 and F3 than the syllabic and postvocalic rhotics. The effects of syllable position and vowel context are also discussed. [ABSTRACT FROM AUTHOR]

Published
2024
Full Text
View/download PDF

46. High Extracellular K+ Drives T-Cell Exhaustion by Disrupting TCR Signals Implicated in Tumor Immune Evasion

Author

Wong, Brandon Han Siang, primary, Poh, Zhi Sheng, additional, Wei, James Tan Chia, additional, Amuthavalli, Kottaiswamy, additional, Ho, Ying Swan, additional, Chen, Shuwen, additional, Mak, Shi Ya, additional, Bi, Xuezhi, additional, Webster, Richard, additional, Shelat, Vishalkumar, additional, Chandy, K. George, additional, and Verma, Navin Kumar, additional

Published
2024
Full Text
View/download PDF

49. Modeling and Simulation of Self-organized Criticality of Intelligent Optical Network Based on Sand Pile Model

Author

Wang, Jingyu, Li, Wei, Li, Juan, Chen, Shuwen, Ran, Jinzhi, Kacprzyk, Janusz, Series Editor, Pal, Nikhil R., Advisory Editor, Bello Perez, Rafael, Advisory Editor, Corchado, Emilio S., Advisory Editor, Hagras, Hani, Advisory Editor, Kóczy, László T., Advisory Editor, Kreinovich, Vladik, Advisory Editor, Lin, Chin-Teng, Advisory Editor, Lu, Jie, Advisory Editor, Melin, Patricia, Advisory Editor, Nedjah, Nadia, Advisory Editor, Nguyen, Ngoc Thanh, Advisory Editor, Wang, Jun, Advisory Editor, Liu, Qi, editor, Mısır, Mustafa, editor, Wang, Xin, editor, and Liu, Weiping, editor

Published
2020
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results