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487 results on '"Xu, Mengyang"'

1. Enhancing Question Answering Precision with Optimized Vector Retrieval and Instructions

Author

Yang, Lixiao, Xu, Mengyang, and Ke, Weimao

Subjects
Computer Science - Information Retrieval, Computer Science - Computation and Language, Computer Science - Machine Learning
Abstract

Question-answering (QA) is an important application of Information Retrieval (IR) and language models, and the latest trend is toward pre-trained large neural networks with embedding parameters. Augmenting QA performances with these LLMs requires intensive computational resources for fine-tuning. We propose an innovative approach to improve QA task performances by integrating optimized vector retrievals and instruction methodologies. Based on retrieval augmentation, the process involves document embedding, vector retrieval, and context construction for optimal QA results. We experiment with different combinations of text segmentation techniques and similarity functions, and analyze their impacts on QA performances. Results show that the model with a small chunk size of 100 without any overlap of the chunks achieves the best result and outperforms the models based on semantic segmentation using sentences. We discuss related QA examples and offer insight into how model performances are improved within the two-stage framework., Comment: 6 pages, 4 tables

Published
2024

7. Scalable Mask Annotation for Video Text Spotting

Author

He, Haibin, Zhang, Jing, Xu, Mengyang, Liu, Juhua, Du, Bo, and Tao, Dacheng

Subjects
Computer Science - Computer Vision and Pattern Recognition, Computer Science - Artificial Intelligence
Abstract

Video text spotting refers to localizing, recognizing, and tracking textual elements such as captions, logos, license plates, signs, and other forms of text within consecutive video frames. However, current datasets available for this task rely on quadrilateral ground truth annotations, which may result in including excessive background content and inaccurate text boundaries. Furthermore, methods trained on these datasets often produce prediction results in the form of quadrilateral boxes, which limits their ability to handle complex scenarios such as dense or curved text. To address these issues, we propose a scalable mask annotation pipeline called SAMText for video text spotting. SAMText leverages the SAM model to generate mask annotations for scene text images or video frames at scale. Using SAMText, we have created a large-scale dataset, SAMText-9M, that contains over 2,400 video clips sourced from existing datasets and over 9 million mask annotations. We have also conducted a thorough statistical analysis of the generated masks and their quality, identifying several research topics that could be further explored based on this dataset. The code and dataset will be released at \url{https://github.com/ViTAE-Transformer/SAMText}., Comment: Technical report. Work in progress

Published
2023

15. The complete and fully-phased diploid genome of a male Han Chinese

Author

Yang, Chentao, Zhou, Yang, Song, Yanni, Wu, Dongya, Zeng, Yan, Nie, Lei, Liu, Panhong, Zhang, Shilong, Chen, Guangji, Xu, Jinjin, Zhou, Hongling, Zhou, Long, Qian, Xiaobo, Liu, Chenlu, Tan, Shangjin, Zhou, Chengran, Dai, Wei, Xu, Mengyang, Qi, Yanwei, Wang, Xiaobo, Guo, Lidong, Fan, Guangyi, Wang, Aijun, Deng, Yuan, Zhang, Yong, Jin, Jiazheng, He, Yunqiu, Guo, Chunxue, Guo, Guoji, Zhou, Qing, Xu, Xun, Yang, Huanming, Wang, Jian, Xu, Shuhua, Mao, Yafei, Jin, Xin, Ruan, Jue, and Zhang, Guojie

Published
2023
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23. Research on Active Power Coordinated Control Strategy of Multiple Converter Stations in Flexible DC Grid

Author

Song, Yantao, Xu, Mengyang, Wu, Qingfan, Liu, Xuhui, Xu, Menghua, 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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