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38 results on '"Yu, Zhenting"'

3. Keyphrase Extraction with Span-based Feature Representations

Author

Mu, Funan, Yu, Zhenting, Wang, LiFeng, Wang, Yequan, Yin, Qingyu, Sun, Yibo, Liu, Liqun, Ma, Teng, Tang, Jing, and Zhou, Xing

Subjects
Computer Science - Computation and Language
Abstract

Keyphrases are capable of providing semantic metadata characterizing documents and producing an overview of the content of a document. Since keyphrase extraction is able to facilitate the management, categorization, and retrieval of information, it has received much attention in recent years. There are three approaches to address keyphrase extraction: (i) traditional two-step ranking method, (ii) sequence labeling and (iii) generation using neural networks. Two-step ranking approach is based on feature engineering, which is labor intensive and domain dependent. Sequence labeling is not able to tackle overlapping phrases. Generation methods (i.e., Sequence-to-sequence neural network models) overcome those shortcomings, so they have been widely studied and gain state-of-the-art performance. However, generation methods can not utilize context information effectively. In this paper, we propose a novelty Span Keyphrase Extraction model that extracts span-based feature representation of keyphrase directly from all the content tokens. In this way, our model obtains representation for each keyphrase and further learns to capture the interaction between keyphrases in one document to get better ranking results. In addition, with the help of tokens, our model is able to extract overlapped keyphrases. Experimental results on the benchmark datasets show that our proposed model outperforms the existing methods by a large margin.

Published
2020

26. Word Segmentation of Micro Blogs with Bagging

Author

Yu, Zhenting, Dai, Xin-Yu, Shen, Si, Huang, Shujian, Chen, Jiajun, Hutchison, David, Editorial Board Member, Kanade, Takeo, Editorial Board Member, Kittler, Josef, Editorial Board Member, Kleinberg, Jon M., Editorial Board Member, Mattern, Friedemann, Editorial Board Member, Mitchell, John C., Editorial Board Member, Naor, Moni, Editorial Board Member, Pandu Rangan, C., Editorial Board Member, Terzopoulos, Demetri, Editorial Board Member, Tygar, Doug, Editorial Board Member, Weikum, Gerhard, Series Editor, Goos, Gerhard, Founding 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, Woeginger, Gerhard, Editorial Board Member, Li, Juanzi, editor, Ji, Heng, editor, Zhao, Dongyan, editor, and Feng, Yansong, editor

Published
2015
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32. Catalytic pyrolysis of woody oil over SiC foam-MCM41 catalyst for aromatic-rich bio-oil production in a dual microwave system

Author

Yu, Zhenting, primary, Jiang, Lin, additional, Wang, Yunpu, additional, Li, Yanzhi, additional, Ke, Linyao, additional, Yang, Qi, additional, Peng, Yujie, additional, Xu, Jiamin, additional, Dai, Leilei, additional, Wu, Qiuhao, additional, Liu, Yuhuan, additional, Ruan, Roger, additional, Xia, Donghua, additional, and Jiang, Li, additional

Published
2020
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38. Hydrothermal pretreatment of bamboo sawdust using microwave irradiation.

Author

Dai, Leilei, He, Chao, Wang, Yunpu, Liu, Yuhuan, Ruan, Roger, Yu, Zhenting, Zhou, Yue, Duan, Dengle, Fan, Liangliang, and Zhao, Yunfeng

Subjects
*PYROLYSIS kinetics, *BAMBOO, *WOOD waste, *MICROWAVE heating, *IRRADIATION
Abstract

In the present study, the effect of temperature and residence time during microwave hydrothermal pretreatment (MHT) on hydrochar properties and pyrolysis behaviors was investigated. Experimental results indicated that higher heating value (HHV) and fixed carbon content gradually increased with increased pretreatment severity. Obvious reduction of oxygen content was found under MHT at 230 °C-15 min and 210 °C-35 min. Although lower mass yield was observed under severe conditions, corresponding energy yield was relatively higher. Crystallinity indexes of hydrochar demonstrated an upward trend with increased residence time. Unlike hydroxyl group, dissociation of acetyls was more favorable under prolonged residence time rather than increased temperature. Peaks in thermogravimetric and derivative thermogravimetric curves shifted to higher temperature region under severe conditions, indicating better thermal stability. Py-GC/MS analysis suggested that acids content was decreased but sugars increased with increased MHT severity. Moreover, compared to temperature, residence time was mainly responsible for acetic acid formation. [ABSTRACT FROM AUTHOR]

Published
2017
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