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220 results on '"Ding, Xiaofei"'

2. Improving Audio-Visual Speech Recognition by Lip-Subword Correlation Based Visual Pre-training and Cross-Modal Fusion Encoder

Author

Dai, Yusheng, Chen, Hang, Du, Jun, Ding, Xiaofei, Ding, Ning, Jiang, Feijun, and Lee, Chin-Hui

Subjects
Computer Science - Computation and Language, Computer Science - Artificial Intelligence, Computer Science - Sound, Electrical Engineering and Systems Science - Audio and Speech Processing
Abstract

In recent research, slight performance improvement is observed from automatic speech recognition systems to audio-visual speech recognition systems in the end-to-end framework with low-quality videos. Unmatching convergence rates and specialized input representations between audio and visual modalities are considered to cause the problem. In this paper, we propose two novel techniques to improve audio-visual speech recognition (AVSR) under a pre-training and fine-tuning training framework. First, we explore the correlation between lip shapes and syllable-level subword units in Mandarin to establish good frame-level syllable boundaries from lip shapes. This enables accurate alignment of video and audio streams during visual model pre-training and cross-modal fusion. Next, we propose an audio-guided cross-modal fusion encoder (CMFE) neural network to utilize main training parameters for multiple cross-modal attention layers to make full use of modality complementarity. Experiments on the MISP2021-AVSR data set show the effectiveness of the two proposed techniques. Together, using only a relatively small amount of training data, the final system achieves better performances than state-of-the-art systems with more complex front-ends and back-ends., Comment: 6 pages, 2 figures, published in ICME2023

Published
2023

3. Coupling Dynamic Characteristics Analysis of a Dual-Rotor Aeroengine

Author

Ding, Xiaofei, Liao, Mingfu, Shao, Zengde, Liu, Yixiong, Angrisani, Leopoldo, Series Editor, Arteaga, Marco, Series Editor, Chakraborty, Samarjit, 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, 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, and Fu, Song, editor

Published
2024
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4. Study on Heat Transfer Model Modification of Air Oil Radiator for Aircraft Generator

Author

Pang, Xiaodong, Liang, Yiqiang, Zhao, Meng, Zhao, Jianjun, Ding, Xiaofei, Chinese Society of Aeronautics and Astronautics, Chaari, Fakher, Series Editor, Gherardini, Francesco, Series Editor, Ivanov, Vitalii, Series Editor, Haddar, Mohamed, Series Editor, Cavas-Martínez, Francisco, Editorial Board Member, di Mare, Francesca, Editorial Board Member, Kwon, Young W., Editorial Board Member, Trojanowska, Justyna, Editorial Board Member, and Xu, Jinyang, Editorial Board Member

Published
2024
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13. Differences between phytophagous and predatory species in Pentatomidae based on the mitochondrial genome.

Author

Ding, Xiaofei, Ge, Siyuan, Chen, Jing, Qi, Long, Wei, Jiufeng, Zhang, Hufang, Hao, Chi, and Zhao, Qing

Subjects
*MITOCHONDRIAL DNA, *BIOLOGICAL pest control agents, *CIRCULAR DNA, *PLANT parasites, *STINKBUGS
Abstract

Pentatomidae includes many species of significant economic value as plant pests and biological control agents. The feeding habits of Pentatomidae are closely related to their energy metabolism and ecological adaptations. In this study, we sequenced the mitochondrial genomes of 12 Asopinae species using the next‐generation sequencing to explore the effect of dietary changes on mitochondrial genome evolution. Notably, all sequences were double‐stranded circular DNA molecules containing 37 genes and one control region. We then compared and analyzed the mitochondrial genome characteristics of phytophagous and predatory bugs. Notably, no significant difference was observed in the length of the mitochondrial genomes between the predatory and phytophagous bugs. However, the AT content was higher in the mitochondrial genomes of phytophagous bugs than that of predatory bugs. Moreover, phytophagous bugs prefer codon usage patterns ending in A/T compared with predatory bugs. The evolution rate of predatory bugs was lower than that of phytophagous bugs. The phylogenetic relationships across phytophagous bugs' lineages were largely consistent at depth nodes based on different datasets and tree‐reconstructing methods, and strongly supported the monophyly of predatory bugs. Additionally, the estimated divergence times indicated that Pentatomidae explosively radiated in the Early Cretaceous. Subsequently, the subfamily Asopinae and the genus Menida diverged in the Late Cretaceous. Our research results provide data supporting for the evolutionary patterns and classification of Pentatomidae. [ABSTRACT FROM AUTHOR]

Published
2024
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16. Design of UHVDC Converter Station

Author

Zhou, Zhichao, Ding, Xiaofei, Qiu, Wenqian, Chen, Jianhua, An, Chunxiu, Liu, Sheng, Zhou, Hao, editor, Qiu, Wenqian, editor, Sun, Ke, editor, Chen, Jiamiao, editor, Deng, Xu, editor, Qian, Feng, editor, Wang, Dongju, editor, Zhao, Bincai, editor, Li, Jiyuan, editor, Li, Sha, editor, Qiu, Yuting, editor, and Yu, Jingzhe, editor

Published
2018
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29. Comparative mitogenomics and phylogenetic analyses of the genus Menida (Hemiptera, Heteroptera, Pentatomidae)

Author

ding, xiaofei, Chen, Chao, Wei, Jiu-Feng, Gao, Xiao-Yun, Zhang, Hufang, and Zhao, Qing

Subjects
Hemiptera, Insecta, Arthropoda, Pentatomidae, phylogenetic relationship, Menida, Animalia, Animal Science and Zoology, Pentatomoidea, mitochondrial genomesm Pentatominae, Biota, Ecology, Evolution, Behavior and Systematics
Abstract

In order to explore the genetic diversity and phylogenetic relationship of the genus Menida Motschulsky, 1861 and reveal the molecular evolution of the family Pentatomidae, subfamily Pentatominae, complete mitochondrial genomes of three species of Menida were sequenced, and the phylogenetic relationships of tribes within the subfamily Pentatominae were studied based on these results. The mitochondrial genomes of Menida musiva (Jakovlev, 1876), M. lata Yang, 1934, and M. metallica Hsiao & Cheng, 1977 were 16,663 bp, 16,463 bp, and 16,418 bp, respectively, encoding 37 genes and including 13 protein-coding genes (PCGs), two rRNA genes, 22 tRNA genes, and a control region. The mitochondrial genome characteristics of Menida were compared and analyzed, and the phylogenetic tree of the Pentatominae was constructed based on the mitochondrial genome datasets using Bayesian inference (BI) and maximum likelihood (MI) methods. The results showed that gene arrangements, nucleotide composition, codon preference, gene overlaps, and RNA secondary structures were highly conserved within the Menida and had more similar characteristics in Pentatominae. The phylogenetic analysis shows a highly consistent topological structure based on BI and ML methods, which supported that the genus Menida belongs to the Pentatominae and is closely related to Hoplistoderini. The examined East Asian species of Menida form a monophyletic group with the internal relationships: (M. musiva + (M. lata + (M. violacea + M. metallica))). In addition, these results support the monophyly of Eysarcorini and Strachiini. Placosternum and Cappaeini are stable sister groups in the evolutionary branch of Pentatominae. The results of this study enrich the mitochondrial genome databases of Pentatominae and have significance for further elucidation of the phylogenetic relationships within the Pentatominae.

Published
2023
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