摘要：
The power system is an important part of the spacecraft. The Superbuck converter is a high-order topology with continuous current and high efficiency. However, when the main circuit parameters are improperly selected, the right half-plane (RHP) zero-point exists in the small-signal model of the converter, which increases the difficulty of the control system design. In this paper, methods such as increasing the damping loop and optimizing the control loop are used to improve the stability of the converter. The main circuit parameters were analyzed and calculated. The PSIM software was used to analyze the time domain transient, frequency domain characteristics, ripple and parameter scanning of the circuit model with parasitic parameters. The voltage control method was selected and the modules of the control loop were designed. The Bode plot shows that the system is robust enough and stable. In addition, using the CST software to simulate the electromagnetic field distribution of the devices. The simulation results can lay a good foundation for the actual production in the next step. Due to its unique advantages, Superbuck circuit will have broad application prospects in the space power controller unit(PCU).
摘要：
A tentative diagnosis is a preliminary suspicion of patient status, which is usually made by physicians according to patient narrative right at admission. It largely depends on the experiences and professional knowledge of physicians. We explored a combination model for automatic tentative diagnosis prediction based on clinical narratives. Text features are extracted in two ways. Firstly, the context semantic features are extracted by attention-based bidirectional long-short term memory (BiLSTM) network. Secondly, the symptom concepts recognized from input texts by Metamap and are vectorized by TF-IDF. Two combination strategies are proposed to utilize both two features for one candidate international classification of diseases (ICD) code recommendation: feature vectors combination and prediction results combination. The experiments performed on MIMIC III dataset. Both of the two combination strategies achieved better perfomance, comparing with either of the model based on single type feature.
作者机构：
[Tan, Huaxin; Zhang, Peng; Liu, Zhonghua; Liang, Songping; Huang, Yazhou] Hunan Normal Univ, Natl & Local Joint Engn Lab Anim Peptide Drug Dev, Coll Life Sci, Changsha 410081, Hunan, Peoples R China.;[Tan, Huaxin; Xu, Jianghong; Ye, Zhongju; Xiao, Lehui; Chen, Bo] Hunan Normal Univ, Key Lab Phytochem R&D Hunan Prov, Coll Chem & Chem Engn, Changsha 410081, Hunan, Peoples R China.;[Xiao, Lehui] Nankai Univ, State Key Lab Med Chem Biol, Coll Chem, Tianjin Key Lab Biosensing & Mol Recognit, Tianjin 300071, Peoples R China.;[Tan, Huaxin] Univ South China, Dept Biochem & Mol Biol, Sch Pharmaceut & Biol Sci, Hengyang 421001, Peoples R China.
通讯机构：
[Lehui Xiao] K;[Zhonghua Liu] T;The National & Local Joint Engineering Laboratory of Animal Peptide Drug Development, College of Life Sciences, Hunan Normal University, Changsha 410081, Hunan, China<&wdkj&>Key Laboratory of Phytochemical R&D of Hunan Province, College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha, Hunan, 410081, China<&wdkj&>State Key Laboratory of Medicinal Chemical Biology College of Chemistry, Tianjin Key Laboratory of Biosensing and Molecular Recognition, Nankai University, Tianjin, 300071, China
会议名称：
19th World Congress of the International-Society-on-Toxinology (IST) / 11th Asia Pacific Congress of the International-Society-on-Toxinology (IST) / 13th Chinese Conference on Toxins and Medical Applications
会议名称：
16th International Symposium on Metal-Hydrogen Systems (MH)
会议时间：
OCT 28-NOV 02, 2018
会议地点：
Guangzhou, PEOPLES R CHINA
会议主办单位：
[Zhong, Dan;Ouyang, Liuzhang;Liu, Jiangwen;Wang, Hui;Zhu, Min] South China Univ Technol, Sch Mat Sci & Engn, Guangdong Prov Key Lab Adv Energy Storage Mat, Guangzhou 510641, Guangdong, Peoples R China.^[Jia, Yi] Griffith Univ, Sch Nat Sci, Nathan, Qld 4111, Australia.^[Jia, Yi] Griffith Univ, Queensland Micro & Nanotechnol Ctr, Nathan, Qld 4111, Australia.^[Ouyang, Liuzhang;Jia, Yi;Zhu, Min] Joint Venture Griffith Univ & South China Univ Te, China Australia Joint Lab Energy & Environm Mat, Nathan, Qld 4111, Australia.
关键词：
CO2 methanation;Ni catalyst;Metal hydride;LaNi5
摘要：
LaNi5 alloy can be utilized to directly store and release hydrogen in mild condition, thus it is considered as a long-term safe and stable solid-state hydrogen storage material. In this work, LaNi5H5 was used as the solid-state hydrogen source in the CO2 methanation reaction. Impressively, the carbon dioxide conversion can be achieved to nearly 100% under 3 MPa mixed gas at 200 degrees C. The microstructure and composition analysis results reveal that the high catalytic activity may originate from the promoted elementary steps over in situ formed metallic Ni nanoparticles during the CO2 methanation process. More importantly, as the lowered reaction temperature prevented the agglomeration of Ni nanoparticles, this catalyst exhibited durable stability with 99% conversion rate of CO2 retained after 400 h cycling test. (C) 2019 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
期刊：
Advances in Intelligent Systems and Computing,2019年778:68-76 ISSN：2194-5357
通讯作者：
Li, Pengcheng
作者机构：
[Jin, Xiao; Li, Pengcheng; Zhang, Li; Li, Xiaofang; Dai, Licao] Univ South China, Human Factor Inst, Hengyang 421001, Hunan, Peoples R China.;[Li, Pengcheng] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Hunan, Peoples R China.
通讯机构：
[Li, Pengcheng] U;Univ South China, Human Factor Inst, Hengyang 421001, Hunan, Peoples R China.;Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Hunan, Peoples R China.
会议名称：
9th International Conference on Applied Human Factors and Ergonomics and the Affiliated Conferences (AHFE) / 2nd International Conference on Human Error, Reliability, Resilience, and Performance (HERRP)
会议时间：
JUL 21-25, 2018
会议地点：
Orlando, FL
会议主办单位：
[Li, Pengcheng;Li, Xiaofang;Dai, Licao;Zhang, Li;Jin, Xiao] Univ South China, Human Factor Inst, Hengyang 421001, Hunan, Peoples R China.^[Li, Pengcheng] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Hunan, Peoples R China.
会议论文集名称：
Advances in Intelligent Systems and Computing
关键词：
Digital nuclear power plants;Human factor event report;Performance Influencing Factors;Team situation awareness
摘要：
In the digital main control rooms (MCRs) of nuclear power plants (NPPs), the role and responsibility of operators as well as their communication ways are changed by the digitization of the human-machine interface, which leads to some new team situation awareness (TSA) errors and different error distribution. In order to identify the interaction mechanism among a team during collecting information and consistently understanding the system/component status, an team interaction model is established by field observation, video analysis, operator interview and event report analysis. Furthermore, the model-based TSA error classification is developed and the influencing factors of TSA error are identified. On this basis, a number of human factor event reports are analyzed and combining with statistical analysis to identify the main TSA errors and influencing factors in digital NPPs. It provides theoretical support for the prevention and control of TSA errors.
期刊：
2018 9th International Conference on Computer Aided Design for Thin-Film Transistor Technologies, CAD-TFT 2018,2019年:18-19
通讯作者：
He, Hongyu
作者机构：
[He, Hongyu] Univ South China, Sch Elect Engn, Hengyang 421001, Peoples R China.;[He, Hongyu; Zhang, Shengdong; Lin, Xinnan] Peking Univ, Sch Elect & Comp Engn, Shenzhen Grad Sch, Shenzhen 518005, Peoples R China.;[Liu, Yuan; Zheng, Xueren] South China Univ Technol, Sch Elect & Informat Engn, Guangzhou 510640, Guangdong, Peoples R China.;[Yan, Binghui] South China Agr Univ, Coll Elect Engn, Guangzhou 510642, Guangdong, Peoples R China.
通讯机构：
[He, Hongyu] U;[He, Hongyu] P;Univ South China, Sch Elect Engn, Hengyang 421001, Peoples R China.;Peking Univ, Sch Elect & Comp Engn, Shenzhen Grad Sch, Shenzhen 518005, Peoples R China.
会议名称：
9th Inthernational Conference on Computer Aided Design for Thin-Film Transistors (CAD-TFT)
会议时间：
NOV 16-18, 2018
会议地点：
Shenzhen, PEOPLES R CHINA
会议主办单位：
[He, Hongyu] Univ South China, Sch Elect Engn, Hengyang 421001, Peoples R China.^[He, Hongyu;Lin, Xinnan;Zhang, Shengdong] Peking Univ, Sch Elect & Comp Engn, Shenzhen Grad Sch, Shenzhen 518005, Peoples R China.^[Liu, Yuan;Zheng, Xueren] South China Univ Technol, Sch Elect & Informat Engn, Guangzhou 510640, Guangdong, Peoples R China.^[Yan, Binghui] South China Agr Univ, Coll Elect Engn, Guangzhou 510642, Guangdong, Peoples R China.
关键词：
Amorphous silicon;analytical model;polycrystalline silicon;thin-film transistor;trap states
摘要：
Our previous drain current model for the organic and amorphous InGaZnO thin-film transistors is applied to the amorphous and polycrystalline silicon thin-film transistors. In the drain current model, it is assumed that the trapped carrier concentration is much higher than the free carrier concentration considering both deep trap states and tail trap states in the energy gap of the thin film. The model is valid in both subthreshold and above-threshold regime, and is verified by the available experimental data at different temperatures.
作者机构：
[Wang, Minghua; Zhu, Lu; Jiang, Yalan; Deng, Xianjun] Univ South China USC, Dept Elect & Commun Engn, Hengyang, Hunan, Peoples R China.;[Yi, Lingzhi] Univ South China USC, Sch Civil Engn, Hengyang, Hunan, Peoples R China.;[Liu, Yong; Deng, Xianjun; Li, Xiangyang] Hunan Prov Engn Technol Res Ctr Uranium Tailings, Hengyang, Hunan, Peoples R China.;[Jin, Zhenkun] China Informat Commun Technol Grp, Wuhan, Peoples R China.
会议名称：
IEEE 17th Int Conf on Dependable, Autonom and Secure Comp / IEEE 17th Int Conf on Pervas Intelligence and Comp / IEEE 5th Int Conf on Cloud and Big Data Comp / IEEE 4th Cyber Science and Technology Congress (DASC/PiCom/CBDCom/CyberSciTech)
会议时间：
AUG 05-08, 2019
会议地点：
Fukuoka, JAPAN
会议主办单位：
[Jiang, Yalan;Zhu, Lu;Deng, Xianjun;Wang, Minghua] Univ South China USC, Dept Elect & Commun Engn, Hengyang, Hunan, Peoples R China.^[Yi, Lingzhi] Univ South China USC, Sch Civil Engn, Hengyang, Hunan, Peoples R China.^[Deng, Xianjun;Liu, Yong;Li, Xiangyang] Hunan Prov Engn Technol Res Ctr Uranium Tailings, Hengyang, Hunan, Peoples R China.^[Jin, Zhenkun] China Informat Commun Technol Grp, Wuhan, Peoples R China.
关键词：
Barrier Coverage;Confident Information Coverage Model;Sensor Networks
摘要：
This paper focuses on barrier coverage problem in sensor networks which are deployed for uranium tailing border monitoring scenarios. Based on the novel Confident Information Coverage(CIC) model, we define and formulate the Barrier Confident Information Coverage (BCIC) problem and propose a novel Learning automata (LA) theory based strategy to construct barrier confident information coverage paths. Simulation results show the devised strategy can effectively construct barrier paths with minimum nodes and optimize barrier coverage performance.
作者机构：
[Chen, Zhiling] Univ South China, Hengyang 421001, Peoples R China.
会议名称：
11th International Conference on Measuring Technology and Mechatronics Automation (ICMTMA)
会议时间：
APR 28-29, 2019
会议地点：
Qiqihar, PEOPLES R CHINA
会议主办单位：
[Chen, Zhiling] Univ South China, Hengyang 421001, Peoples R China.
会议论文集名称：
International Conference on Measuring Technology and Mechatronics Automation
关键词：
physique health monitoring;Android;Java;API
摘要：
By monitoring the health and physical quality of college students in real time, we can find the problems and adjust the training plan and training methods. This article designs and implements a student physical health monitoring and management system under Android platform. The requirements analysis, architecture design, outline design, detailed design and implementation of the system are described in detail, and the database design of the system is completed. The details of the interface of the module are determined, the implementation process of key technologies are realized, and the implementation of the extensible framework for the application of the system server and the application of the intelligent terminal are also performed. The tests and analysis results show that the whole system meets the requirements of function and performance, which achieves expected effects.
作者：
Cooke, C.*;Velthuis, J. J.;Beck, L.;Martin, P.
作者机构：
[Martin, P.; Cooke, C.; Beck, L.; Velthuis, J. J.] Univ Bristol, HH Wills Phys Lab, Sch Phys, Tyndall Ave, Bristol BS8 1TL, Avon, England.;[Velthuis, J. J.] Univ South China, Sch Nucl Sci & Technol, 28 West Changsheng Rd, Hengyang, Peoples R China.
会议名称：
IEEE Nuclear Science Symposium / Medical Imaging Conference (NSS/MIC)
会议时间：
OCT 26-NOV 02, 2019
会议地点：
Manchester, ENGLAND
会议主办单位：
[Cooke, C.;Velthuis, J. J.;Beck, L.;Martin, P.] Univ Bristol, HH Wills Phys Lab, Sch Phys, Tyndall Ave, Bristol BS8 1TL, Avon, England.^[Velthuis, J. J.] Univ South China, Sch Nucl Sci & Technol, 28 West Changsheng Rd, Hengyang, Peoples R China.
会议论文集名称：
IEEE Nuclear Science Symposium and Medical Imaging Conference
摘要：
For homeland security applications, it is of high importance to locate radioactive sources. This is usually done using networks of sensors. We developed a technique to obtain the distance between the source and detector using a single detector without knowledge of the source activity. The percentage of detected counts in a radiation detector with energies lower than the photopeak is used to find the distance between the detector and stationary gamma source. This method has been tested using Geant4 simulations for Cs-137, Co-60 and U-235, and experimentally confirmed for Cs-137. A very strong correlation between the true distance and reconstructed distance was found. High and low air pressure simulations were also tested for Cs-137 and found to retain good distance resolution.
