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832 results on '"Zhang, Guogang"'

2. Multichannel consecutive data cross-extraction with 1DCNN-attention for diagnosis of power transformer

Author

Zheng, Wei, Zhang, Guogang, Zhao, Chenchen, and Zhu, Qianqian

Subjects
Computer Science - Machine Learning, Electrical Engineering and Systems Science - Systems and Control
Abstract

Power transformer plays a critical role in grid infrastructure, and its diagnosis is paramount for maintaining stable operation. However, the current methods for transformer diagnosis focus on discrete dissolved gas analysis, neglecting deep feature extraction of multichannel consecutive data. The unutilized sequential data contains the significant temporal information reflecting the transformer condition. In light of this, the structure of multichannel consecutive data cross-extraction (MCDC) is proposed in this article in order to comprehensively exploit the intrinsic characteristic and evaluate the states of transformer. Moreover, for the better accommodation in scenario of transformer diagnosis, one dimensional convolution neural network attention (1DCNN-attention) mechanism is introduced and offers a more efficient solution given the simplified spatial complexity. Finally, the effectiveness of MCDC and the superior generalization ability, compared with other algorithms, are validated in experiments conducted on a dataset collected from real operation cases of power transformer. Additionally, the better stability of 1DCNN-attention has also been certified.

Published
2023

16. Fault Diagnosis and Location of Power Transformer Based on Optimized Deep Belief Network with Random Forest and Sparrow Search Algorithm

Author

Liu, Jiaxin, Wang, Shuai, Zhao, Chenchen, Zheng, Wei, Zhang, Guogang, Zhou, Yuxiao, Lu, Xuchen, Angrisani, Leopoldo, Series Editor, Arteaga, Marco, Series Editor, Panigrahi, Bijaya Ketan, 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, Hirche, Sandra, 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, Möller, Sebastian, Series Editor, Mukhopadhyay, Subhas, Series Editor, Ning, Cun-Zheng, Series Editor, Nishida, Toyoaki, Series Editor, Oneto, Luca, 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, Zhang, Junjie James, Series Editor, Yang, Qingxin, editor, Li, Jian, editor, Xie, Kaigui, editor, and Hu, Jianlin, editor

Published
2023
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29. Assessing the role of live poultry trade in community-structured transmission of avian influenza in China

Author

Yang, Qiqi, Zhao, Xiang, Lemey, Philippe, Suchard, Marc A, Bi, Yuhai, Shi, Weifeng, Liu, Di, Qi, Wenbao, Zhang, Guogang, Stenseth, Nils Chr, Pybus, Oliver G, and Tian, Huaiyu

Subjects
Medical Microbiology, Biomedical and Clinical Sciences, Clinical Sciences, Prevention, Infectious Diseases, Pneumonia & Influenza, Influenza, 2.2 Factors relating to the physical environment, Aetiology, Infection, Animals, China, Genome, Viral, Humans, Influenza A Virus, H5N1 Subtype, Influenza A Virus, H7N9 Subtype, Influenza in Birds, Phylogeography, Poultry, Transportation, avian influenza, poultry trade, phylogeography, community-structured transmission
Abstract

The live poultry trade is thought to play an important role in the spread and maintenance of highly pathogenic avian influenza A viruses (HP AIVs) in Asia. Despite an abundance of small-scale observational studies, the role of the poultry trade in disseminating AIV over large geographic areas is still unclear, especially for developing countries with complex poultry production systems. Here we combine virus genomes and reconstructed poultry transportation data to measure and compare the spatial spread in China of three key subtypes of AIV: H5N1, H7N9, and H5N6. Although it is difficult to disentangle the contribution of confounding factors, such as bird migration and spatial distance, we find evidence that the dissemination of these subtypes among domestic poultry is geographically continuous and likely associated with the intensity of the live poultry trade in China. Using two independent data sources and network analysis methods, we report a regional-scale community structure in China that might explain the spread of AIV subtypes in the country. The identification of this structure has the potential to inform more targeted strategies for the prevention and control of AIV in China.

Published
2020

41. Disscussion on the Design Philosophy to Meet Water Consumption Index of Circulation Cooling Combined-Cycle Peak-Regulation Power Plant in South China

Author

ZHANG Ying, ZHANG Guogang, and ZOU Jian

Subjects
combined-cycle, peak-regulation, circulation cooling, cooling tower, water consumption index, Energy industries. Energy policy. Fuel trade, HD9502-9502.5
Abstract

[Introduction] With the promotion of comprehensive utilization of natural gas and the encouragement of clean energy power generation, the construction of large combined-cycle power plant is one of the important forms to achieve this goal. [Method] In this paper, through case study, scheme formulation, analysis and summary, the design philosophy to meet water consumption index of large combined-cycle peak-regulation power plant in south China was studied and discussed: The water source characteristics and design difficulties of the project were analyzed, the water-saving design scheme was formulated, the water balance was calculated, and other water-saving design ideas were discussed. [Result] In order to meet the increasingly stringent requirements of water consumption index, large circulation cooling combined-cycle peak-regulation power plant in South China should consider the water source characteristics, selection of concentration ratio of cooling tower and reuse of cooling tower discharge water based on the site conditions of the project, and formulate appropriate design schemes to ensure the realization of water-saving goal. [Conclusion] The research can provide design philosophy for the same type plants to meet water comsuption index.

Published
2022
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44. Wear Characteristics Caused by Ti 3 AlC 2 Particles under Impact-Sliding Conditions in Marine Engine.

Author

Liu, Jie, Shen, Yan, Liu, Zhixiang, Yu, Baihong, Qu, Jinghao, Li, Leize, and Zhang, Guogang

Subjects
PISTON rings, MARINE engines, LUBRICANT additives, CAST-iron, IRON founding
Abstract

With the marine industry's demands for carbon reduction and increased reliability, the friction and wear performance of marine engines is becoming increasingly important. MAX phase materials show great potential in marine engine tribopair materials due to their unique microstructure and performance. The typical MAX phase material Ti3AlC2 was combined with MoDTC and added to the lubricant containing ZDDP additive for the tribopair composed of chromium-based ceramic composite coated steel (CKS) piston rings and cast iron cylinder liners under impact-sliding conditions. Compared to Ti3AlC2 alone, the friction coefficient and wear depth of the designed composite additive MoDTC/Ti3AlC2 were reduced by 36.9% and 41.4%, respectively. The worn surface lubricated with the Ti3AlC2/MoDTC composite additive showed fewer scratches with significantly less plastic deformation and clearer honing grooves. The multi-component tribofilm containing FeS, MoS2, MoO3, ZnO, TiO2, Al2O3, unoxidised particles, short-chain phosphates, and some ZnS was present on the worn cylinder liner surface. The synergistic effect of Ti3AlC2, MoDTC and ZDDP additives in the lubricant can isolate the mutual contact, generate a solid tribofilm and reduce the scratching. This can provide some guidance for the development of high-performance lubricant additives under impact-sliding conditions. [ABSTRACT FROM AUTHOR]

Published
2024
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45. Rapid Spread of Severe Fever with Thrombocytopenia Syndrome Virus by Parthenogenetic Asian Longhorned Ticks

Author

Zhang, Xing, Zhao, Chaoyue, Cheng, Chaoyuan, Zhang, Guogang, Yu, Tao, Lawrence, Kevin, Li, Hongyue, Sun, Jimin, Yang, Zeyu, Ye, Ling, Chu, Hongliang, Wang, Ying, Han, Xiaohu, Jia, Yongchao, Fan, Shuozhang, Kanuka, Hirotaka, Tanaka, Tetsuya, Jenkins, Cheryl, Gedye, Kristene, Chandra, Shona, Price, Dana C., Liu, Qiyong, Choi, Young Ki, Zhan, Xiangjiang, Zhang, Zhibin, and Zheng, Aihua

Subjects
Tick-borne diseases -- Statistics -- Risk factors, Fever -- Statistics -- Risk factors, Disease transmission -- Statistics -- Risk factors, RNA virus infections -- Statistics -- Risk factors, Hyperthermia -- Statistics -- Risk factors, Thrombocytopenia -- Statistics -- Risk factors, Health
Abstract

Parthenogenesis is the development of an embryo from an unfertilized egg and is a common reproductive mechanism in invertebrate arthropods, especially insects and mites (1). One of the potential advantages [...]

Published
2022
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