Search

Your search keyword '"Zheng, Weiyang"' showing total 34 results
Start Over Author "Zheng, Weiyang" Publication Year Range Last 10 years
34 results on '"Zheng, Weiyang"'

7. Rapid Sintering and Nondestructive Testing of Nanometal Chip Bonding Layer by Pulsed Current Discharge

Author

Li, Xiandong, Xiong, Ding, Zheng, Weiyang, Yu, Liang, and Li, Jian

Abstract

Developing new high-performance packaging technologies adapting for the third-generation semiconductors is an urgent need to the related industry applications nowadays. In this work, we reported a novel method for the rapid sintering and nondestructive testing of the nanometal chip bonding layer by pulsed current discharge, which can realize short sintering time (millisecond level), low sintering temperature (< 200 °C), and high bonding strength (>50 MPa). The physical mechanism behind the transient sintering process was revealed based on high-speed observation, infrared measurement, and electrical parameter analysis. The statistical and SEM analysis indicated that the sample resistance and the bonding strength have a negative correlation, which means that the electric characteristics can be used as an important evaluation index for the bonding state. Finally, a practical prediction model for the time-varying resistance of the well-sintered sample (reference curve) was established. On this basis, the nondestructive testing method of the bonding layer and its optimal sintering strategy were proposed. Overall, this work provides a deeper insight into the electrical sintering, proving its promising application prospect.

Published
2023
Full Text
View/download PDF

13. The efficacy and safety of anti‐tumor necrosis factor agents in the treatment of intestinal Behcet's disease, a systematic review and meta‐analysis

Author

Zhang, Mengyuan, primary, Liu, Jinjing, additional, Liu, Tingting, additional, Han, Wei, additional, Bai, Xiaoyin, additional, Ruan, Gechong, additional, Lv, Hong, additional, Shu, Huijun, additional, Li, Yue, additional, Li, Ji, additional, Tan, Bei, additional, Zheng, Weiyang, additional, Xu, Hui, additional, Zheng, Wenjie, additional, Yang, Hong, additional, and Qian, Jiaming, additional

Published
2022
Full Text
View/download PDF

17. Upfront transplantation may have better outcomes than pretransplant cytoreductive therapy for treating patients with MDS‐EB ‐1 or MDS‐EB ‐2

Author

Chen, Yili, primary, Huang, Fen, additional, Xuan, Li, additional, Zhang, Yu, additional, Fan, Zhiping, additional, Xu, Na, additional, Zhao, Ke, additional, Xu, Jun, additional, Liu, Hui, additional, Shi, Pengcheng, additional, Wang, Zhixiang, additional, Sun, Jing, additional, Zheng, Weiyang, additional, Dai, Min, additional, and Liu, Qifa, additional

Published
2021
Full Text
View/download PDF

20. The role of cytomegalovirus colitis on short- and long-term outcomes for patients with ulcerative colitis.

Author

Zhang, Mengmeng, Bai, Xiaoyin, Zhang, Huimin, You, Yan, Lv, Hong, Li, Yue, Tan, Bei, Li, Ji, Xu, Hui, Zheng, Weiyang, Yang, Hong, and Qian, Jiaming

Subjects
ULCERATIVE colitis, COLITIS, DISEASE risk factors, CYTOMEGALOVIRUSES, IMMUNOGLOBULIN G, ISCHEMIC colitis
Abstract

Cytomegalovirus (CMV) colitis brings great obstacles for treatment of ulcerative colitis (UC). We aimed to assess the impact of CMV colitis on prognostic outcomes and associated risk factors for UC patients. A consecutive 77 inpatients diagnosed as UC were collected retrospectively from January 2012 to December 2015. About 33 patients were defined with CMV colitis by histological tests of colon mucosa. Clinical characteristics and outcomes were compared between patients with CMV colitis or those without. The primary outcomes were UC-related colectomy or the first time of disease relapse after discharge. 33 CMV colitis patients had higher frequency of recent steroid treatment (81.8% vs. 31.8%, p <.001), older age of onset (45.3 ± 13.0 vs. 44.5 ± 15.7 years, p =.028) and more severe colitis (p <.001) characterized by lower hemoglobin (99.0 ± 23.2 vs. 114.6 ± 22.6 g/L, p =.004), albumin (29.7 ± 4.6 vs. 35.4 ± 6.5 g/L, p <.001), immunoglobulin G [8.8 (5.9–10.6) vs. 12.3 (9.3–16.2) g/L, p =.003] and higher C reactive protein [48.5 (21.6–73.8) vs. 9.1 (3.6–35.0) mg/L, p <.001]. The occurrence of UC-related colectomy in patients with CMV colitis was more frequent (48.5% vs 20.5%, p<.01) and CMV colitis was proved to be one of risk factors of colectomy with a hazard ratio of 3.15 (95%CI 1.387–7.171, p =.006), mainly in a short term period. UC-related complications almost occurred within 1 year since CMV colitis diagnosis. And UC patients with CMV colitis always experienced early relapse. CMV colitis increases the colectomy risk mainly in a short term due to severe inflammatory response, early-onset complications or medication treatment failure. There is also potential correlation between CMV colitis and early relapse. Short-term therapy for UC patients with CMV colitis should be more concerned on controlling systemic inflammation and reducing complications whereas long-term maintenance therapy may not require more aggressive intervention. [ABSTRACT FROM AUTHOR]

Published
2022
Full Text
View/download PDF

34. Impact of Helicobacter pylori on the gastric microbiome in patients with chronic gastritis: a systematic review and meta-analysis protocol.

Author

Cao X, Yang Y, Zhang Y, Ji R, Zhao X, Zheng W, and Yang A

Subjects
Adult, Humans, Middle Aged, Systematic Reviews as Topic, Meta-Analysis as Topic, Gastrointestinal Microbiome, Helicobacter pylori, Gastritis microbiology, Gastritis, Atrophic
Abstract

Introduction: Chronic gastritis is a common disease worldwide. Studies have consistently shown that chronic gastritis is usually associated with gastric microbial dysbiosis, especially the infection of Helicobacter pylori . However, the interaction between H. pylori and non- H. pylori bacteria in patients with chronic gastritis has not been clearly identified yet. Consequently, we designed a protocol for a systematic review and meta-analysis, which focused on identifying the changes in gastrointestinal microbiota composition between patients with H. pylori -infective and non-infective chronic gastritis., Method and Analysis: We will search PubMed, EMBASE and Cochrane Library databases to retrieve observational studies on humans. The eligible studies must include data about the relative abundance of the gastrointestinal microbiome in patients with H. pylori -infective or non-infective chronic gastritis. Only the data of adults aged over 18 years will be analysed. Two researchers will extract the data independently, and Newcastle-Ottawa Scale will be used to assess the risk of bias. Random-effects model will be performed in quantitative analyses. Correlation analysis, bioinformatics analysis and function analysis will be performed., Discussion: Currently, numerous studies have revealed the role of H. pylori in chronic gastritis. However, the alterations of non- H. pylori bacteria in patients with chronic gastritis remain an open question. The results of our study might provide new insights into future diagnosis and treatments., Ethics and Dissemination: This study is based on published documents, unrelated to personal data, so ethical approval is not in need. The results of this study are expected to be published in journals or conference proceedings., Prospero Registration Number: CRD42020205260; Pre-results., Competing Interests: Competing interests: None declared., (© Author(s) (or their employer(s)) 2023. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.)

Published
2023
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results