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2,001 results on '"Xing Han"'

102. MeDAL: Medical Abbreviation Disambiguation Dataset for Natural Language Understanding Pretraining

Author

Wen, Zhi, Lu, Xing Han, and Reddy, Siva

Subjects
Computer Science - Computation and Language, Computer Science - Artificial Intelligence, Computer Science - Machine Learning
Abstract

One of the biggest challenges that prohibit the use of many current NLP methods in clinical settings is the availability of public datasets. In this work, we present MeDAL, a large medical text dataset curated for abbreviation disambiguation, designed for natural language understanding pre-training in the medical domain. We pre-trained several models of common architectures on this dataset and empirically showed that such pre-training leads to improved performance and convergence speed when fine-tuning on downstream medical tasks., Comment: EMNLP 2020 Clinical NLP

Published
2020
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103. The Tsinghua University-Ma Huateng Telescopes for Survey: Overview and Performance of the System

Author

Zhang, Ji-Cheng, Wang, Xiao-Feng, Mo, Jun, Xi, Gao-Bo, Lin, Jie, Jiang, Xiao-Jun, Zhang, Xiao-Ming, Li, Wen-Xiong, Yan, Sheng-Yu, Chen, Zhi-Hao, Hu, Lei, Li, Xue, Lin, Wei-Li, Lin, Han, Miao, Cheng, Rui, Li-Ming, Sai, Han-Na, Xiang, Dan-Feng, and Zhang, Xing-Han

Subjects
Astrophysics - Instrumentation and Methods for Astrophysics
Abstract

Over the past decade, time-domain astronomy in optical bands has developed rapidly with the operations of some wide-field survey facilities. However, most of these surveys are conducted with only a single band, and simultaneous color information is usually unavailable for the objects monitored during the survey. Here we present introductions to the system of Tsinghua University-Ma Huateng Telescopes for Survey (TMTS), which consists of an array of four optical telescopes installed on a single equatorial mount. Such a system is designed to get multiband photometry simultaneously for stars and transients discovered during the survey. The optics of each telescope is a modified Hamilton-Newtonian system, covering the wavelengths from 400 to 900 nm, with a field of view (FoV) of about 4.5 deg2 and a plate scale of 1.86"/pixel when combining with a 4K*4K QHY4040 CMOS detector. The TMTS system can have a FoV of about 9 deg2 when monitoring the sky with two bands (i.e., SDSS g and r filters) at the same time, and a maximum FoV of ~18 deg2 when four telescopes monitor different sky areas in monochromatic filter mode. For an exposure time of 60 s, the average 3{\sigma} detection limit of the TMTS system can reach at ~19.4 mag in Luminous filter and at ~18.7 mag in SDSS r filter. The preliminary discovery obtained during the first few months' survey is briefly discussed. As this telescope array is located at the Xinglong Observatory of NAOC, it can have an excellent synergy with the spectroscopic survey by the LAMOST (with a FoV of about 20 deg2) at the same site, which will benefit the studies of stellar and binary physics besides the transient sciences., Comment: 27 pages, 21 figures

Published
2020
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104. Kilonova Emission From Black Hole-Neutron Star Mergers. II. Luminosity Function and Implications for Target-of-opportunity Observations of Gravitational-wave Triggers and Blind Searches

Author

Zhu, Jin-Ping, Wu, Shichao, Yang, Yuan-Pei, Zhang, Bing, Gao, He, Yu, Yun-Wei, Li, Zhuo, Cao, Zhoujian, Liu, Liang-Duan, Huang, Yan, and Zhang, Xing-Han

Subjects
Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Solar and Stellar Astrophysics, General Relativity and Quantum Cosmology
Abstract

We present detailed simulations of black hole-neutron star (BH-NS) mergers kilonova and gamma-ray burst (GRB) afterglow and kilonova luminosity function, and discuss the detectability of electromagnetic (EM) counterpart in connection with gravitational wave (GW) detections, GW-triggered target-of-opportunity observations, and time-domain blind searches. The predicted absolute magnitude of the BH-NS kilonovae at $0.5\,{\rm days}$ after the merger falls in $[-10,-15.5]$. The simulated luminosity function contains the potential viewing-angle distribution information of the anisotropic kilonova emission. We simulate the GW detection rates, detectable distances and signal duration, for the future networks of 2nd/2.5th/3rd-generation GW detectors. BH-NSs tend to produce brighter kilonovae and afterglows if the BH has a higher aligned-spin, and a less massive NS with a stiffer EoS. The detectability of kilonova is especially sensitive to the BH spin. If BHs typically have low spins, the BH-NS EM counterparts are hard to discover. For the 2nd generation GW detector networks, a limiting magnitude of $m_{\rm limit}\sim23-24\,{\rm mag}$ is required to detect the kilonovae even if BH high spin is assumed. Thus, a plausible explanation for the lack of BH-NS associated kilonova detection during LIGO/Virgo O3 is that either there is no EM counterpart (plunging events), or the current follow-ups are too shallow. These observations still have the chance to detect the on-axis jet afterglow associated with an sGRB or an orphan afterglow. Follow-up observations can detect possible associated sGRB afterglows, from which kilonova signatures may be studied. For time-domain observations, a high-cadence search in redder filters is recommended to detect more BH-NS associated kilonovae and afterglows., Comment: Accepted for Publication in ApJ, 36 pages, 17 figures, 6 tables

Published
2020
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113. Proteomics study of changes in soybean lines resistant and sensitive to Phytophthora sojae

Author

Gai JunYi, Shen Qi, Zuo QiaoMei, Bian XiaoChun, Xiang Yang, Zhao JinMing, Zhang YuMei, and Xing Han

Subjects
Cytology, QH573-671
Abstract

Abstract Background Phytophthora sojae causes soybean root and stem rot, resulting in an annual loss of 1-2 billion US dollars in soybean production worldwide. A proteomic technique was used to determine the effects on soybean hypocotyls of infection with P. sojae. Results In the present study, 46 differentially expressed proteins were identified in soybean hypocotyls infected with P. sojae, using two-dimensional electrophoresis and matrix-assisted laser desorption/ionization tandem time of flight (MALDI-TOF/TOF). The expression levels of 26 proteins were significantly affected at various time points in the tolerant soybean line, Yudou25, (12 up-regulated and 14 down-regulated). In contrast, in the sensitive soybean line, NG6255, only 20 proteins were significantly affected (11 up-regulated and 9 down-regulated). Among these proteins, 26% were related to energy regulation, 15% to protein destination and storage, 11% to defense against disease, 11% to metabolism, 9% to protein synthesis, 4% to secondary metabolism, and 24% were of unknown function. Conclusion Our study provides important information on the use of proteomic methods for studying protein regulation during plant-oomycete interactions.

Published
2011
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127. Precise classification and regional delineation of maturity groups in soybean cultivars across China

Author

Song, Wenwen, Liu, Luping, Sun, Shi, Wu, Tingting, Zeng, Haiyan, Tian, Shiyan, Sun, Bincheng, Li, Wenbin, Liu, Lijun, Wang, Shuming, Xing, Han, Zhou, Xin’an, Nian, Hai, Lu, Wencheng, Han, Xiaozeng, Wang, Shouyi, Chen, Weiyuan, Guo, Tai, Song, Xiqing, Tian, Zhongyan, Cheng, Yanxi, Song, Shuhong, Fu, Lianshun, Wang, Huicai, Luo, Ruiping, Liu, Xueyi, Liu, Qi, Zhang, Guohong, Lu, Sihui, Xu, Ran, Li, Suzhen, Lu, Weiguo, Zhang, Qi, Wang, Zongbiao, Jiang, Chengong, Shen, Weiliang, Zhang, Mingrong, Zhu, Danhua, Wang, Ruizhen, Chen, Yuan, Wang, Tiejun, Zhu, Xingtao, Zhan, Yong, Jiang, Bingjun, Xu, Cailong, Yuan, Shan, Hou, Wensheng, Gai, Junyi, Wu, Cunxiang, and Han, Tianfu

Published
2023
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