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International Conference on Electrical Machines and systems (ICEMS)

作者： Xiaohui Xu Nianzhou Liu Kui Wang Zedong Zheng Yongdong Li Science and Technology on Ship Integrated Power System Technology Laboratory Wuhan China China State Key Lab. of Power System Tsinghua University Beijing China

Multi-phase open-winding motors are widely used in ship electric propulsion systems. In order to improve the power density, efficiency and harmonic performance, this paper presents an ANPC/H-Bridge inverter with hybrid utilization of Si IGBTs and SiC MOSFETs. Each phase of this inverter consists of two three-level ANPC bridges and all the phases are powered by a common DC-link. Each three-level ANPC bridge includes four Si IGBTs operated at fundamental frequency and two SiC MOSFETs operated at carrier frequency. A neutral-point potential balance method is also proposed. Simulation results are presented to demonstrate the validity of this voltage balancing method.

关键词： Inverters Bridge circuits Marine vehicles Modulation Propulsion Harmonic analysis Silicon

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An interpretable reasoning network for multi-relation question answering 27

An interpretable reasoning network for multi-relation questi...

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27th International Conference on Computational Linguistics, COLING 2018

作者： Zhou, Mantong Huang, Minlie Zhu, Xiaoyan State Key Lab. of Intelligent Technology and Systems National Lab. for Information Science and Technology Dept. of Computer Science and Technology Tsinghua University Beijing China

ISBN: (纸本)9781948087506

Multi-relation Question Answering is a challenging task, due to the requirement of elab.rated analysis on questions and reasoning over multiple fact triples in knowledge base. In this paper, we present a novel model called Interpretable Reasoning Network that employs an interpretable, hop-by-hop reasoning process for question answering. The model dynamically decides which part of an input question should be analyzed at each hop;predicts a relation that corresponds to the current parsed results;utilizes the predicted relation to update the question representation and the state of the reasoning process;and then drives the next-hop reasoning. Experiments show that our model yields state-of-the-art results on two datasets. More interestingly, the model can offer traceable and observable intermediate predictions for reasoning analysis and failure diagnosis, thereby allowing manual manipulation in predicting the final answer. © 2018 COLING 2018 - 27th International Conference on Computational Linguistics, Proceedings. All rights reserved.

关键词： Knowledge based systems

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A Novel Environment Perception Algorithm Combining Biologically Inspired Features and Brain-like Memory Pattern 4

A Novel Environment Perception Algorithm Combining Biologica...

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2019 4th Annual International Conference on Information system and Artificial Intelligence, ISAI 2019

作者： Yan, Xingwei Yang, Afeng Du, Chun Liu, Zhangmeng State Key Lab. of Complex Electromagnetic Environment Effects on Electronics and Information System National University of Defense Technology No.109 Deya Road Kaifu District Changsha China College of Electronic Science National University of Defense Technology No.109 Deya Road Kaifu District Changsha China

In this paper, we proposed a novel framework for environment perception. The proposed model combines the physio-logical mechanisms of human vision and psychological principle of cognitive development. Our algorithm consists of two major components, a gist module and a memory module. The gist module simulates the cognition process associated with visual attention. The memory module is simulated by the Incremental Hierarchical Discriminant Regression (IHDR) tree, which ensures the memories of the world are distributed over the hierarchy. Experimental results on the USC dataset demonstrated that the proposed algorithm is robust and efficient. © 2019 Published under licence by IOP Publishing Ltd.

关键词： Behavioral research

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Extended-range Forecasts of Power Grid Ice Accretion in Southern China: Case Studies 3

Extended-range Forecasts of Power Grid Ice Accretion in Sout...

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3rd IEEE Conference on Energy Internet and Energy system Integration, EI2 2019

作者： Cai, Zelin Feng, Tao Xu, Xunjian Hu, Zhe Cao, Xi Peng, Jiwen State Key Lab. of Disaster Prev. and Reduction for Pwr. Grid Transmission and Distribution Equipment Changsha China Huazhong University of Science and Technology Wuhan China Institute of Atmospheric Physics Chinese Academy of Sciences Center for Monsoon System Research Beijing China

ISBN: (纸本)9781728131375

The acceleration of wide-spread ice on transmission linescan cause a large number of tower collapse and line breakage, which threatens the essential security of power grid. The forecast of transmission line ice accretion could guide the deployment of anti-icing equipment in advance and reduce the economic losses caused by ice disasters. In this paper, the relationship between five ice storm events over southern China and Stratospheric planetary wave (PW) anomalies was studied by synthetic analysis. It is found that planetary wave activities will abruptly increase within 10 - 15 days before the ice storm events. Furthermore, a method of forecasting ice storm events over southern China by using such planetary wave anomalies is proposed. © 2019 IEEE.

关键词： Losses

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Application and Effect Analysis of Series Reactive Power Compensation in Low Voltage Distribution Network 20

Application and Effect Analysis of Series Reactive Power Com...

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3rd International Conference on Electronics and Electrical Engineering technology. EEET 2020

作者： Yu, Yongjun Weng, Junmei Xu, Weifeng Cai, Chongkai Duanmu, Ziang Hong, Jinqi Zhao, Hui Shaoxing Power Supply Company State Grid Zhejiang Electric Power Co.Ltd Shaoxing China Songyang Power Supply Company State Grid Zhejiang Electric Power Co.Ltd Lishui China Songyang Power Supply Company State Grid Zhejiang Electric Power Co.Ltd Lishui China Shaoxing Power Supply Company State Grid Zhejiang Electric Power Co.Ltd Shaoxing China State Key Lab. of Pwr. Transmiss. Equip. and Syst. Secty. and New Technol. Chongqing Univ. Chongqing China Shaoxing Power Supply Company State Grid Zhejiang Electric Power Co. Ltd Shaoxing China State Key Laboratory of Power Transmission Equipment and System Security and New Technology Chongqing University Chongqing China

ISBN: (纸本)9781450387569

The load terminal voltage at the low voltage side of the distribution network will drop when the user load increases. Thereby affecting the normal operation of the electrical appliance. Currently, the treatment approach to the voltage deviation at the low voltage side of the distribution network is using the Parallel reactive power compensation technology. However, the compensation effect will decrease with the load increases. To solve the above problems, this paper proposes a method for applying series capacitor compensation to the low voltage side of the distribution network. Firstly, the principle of low voltage generation on the low-voltage side of the distribution network is derived. Then introduce the principle of series reactive power compensation method. And according to the actual parameters of the project, simulate the terminal voltage amplitudes and the line current under the different wire types and load rates. Finally, the improvement effect of series reactive power compensation on the low-voltage side power quality of distribution network is analyzed with simulation calculation. The results show that the proposed method has a good control effect on the power quality of the low-voltage side of the distribution network. © 2020 ACM.

关键词： Electric power utilization

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A New Method of Specific Emitter Identification

A New Method of Specific Emitter Identification

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2019 IEEE International Conference on Signal, Information and Data Processing, ICSIDP 2019

作者： Sun, Liting Zhang, Wanlong Wang, Xiang Li, Kaihong Guo, Yiwei Yang, Jiarun State Key Lab. of Complex Electromagnetic Environment Effects on Electronics and Information System National University of Defense Technology Changsha China Unit 78100 of PLA Chengdu Sichuan China Unit 91605 of PLA Xiamen Fujian China Unit 32045 of PLA Xiamen Fujian China

ISBN: (纸本)9781728123455

Specific Emitter Identification (SEI) techniques have been widely used as a tool of spectrum management operation to enhance the security by matching the received signal with the specific emitter. However, there are few methods focusing on the unintentional modulation (UIM) of signals. In this letter, we propose a novel method which extracts the UIM part in the frequency spectrum and instantaneous phase from the original signals as UIM radio frequency fingerprinting, and then use the non-Gaussian measuring tools to extract the dimension-reduced secondary features. The real-world signals are used to evaluate the performance of the proposed method and the Support Vector Machine (SVM) classifier and the Gaussian Mixture Model (GMM) classifier are applied to make the classification. Experiment results verified that the proposed method has remarkable performance and less computational complexity, which is relatively practical. © 2019 IEEE.

关键词： Support vector machines

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A Corrective Control Approach For Combined Heat And Power system integrated with Multiple Energy Storage system

A Corrective Control Approach For Combined Heat And Power Sy...

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2019 IEEE PES Innovative Smart Grid Technologies Asia, ISGT 2019

作者： Lin, Qunli Shen, Xinwei Sun, Yong Li, Zhenyuan Guo, Qinglai Sun, Hongbin Shenzhen Environmental Science and New Energy Technology Engineering Laboratory Tsinghua-Berkeley Shenzhen Insitute Tsinghua University Shenzhen China State Grid Corp. of China Jilin Power Grid Company Jilin China State Key Lab. of Control and Simulation of Power System and Generation Equipments Tsinghua University Beijing China

ISBN: (纸本)9781728135205

The integrated Energy system (IES) becomes very important nowadays, however, the coupling between multiple energy systems will bring new challenges to the security control of the IES, such as combined heat and power (CHP) system. The corrective control means that the operations can be adjusted after contingency happens to eliminate the constraints violation in the contingency state such as the transmission outage or generator outage. This paper proposes a corrective control approach for CHP system integrated with the energy storage system based on security constrained economic dispatch (SCED) model. Case studies based on the IEEE 9-bus CHP system are presented to verify the method. The case result shows that the energy storage device can solve the ramping of the unit's output adjustment well. The corrective control method is more scientific and economical. © 2019 IEEE.

关键词： Outages

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Research on the dispatch proportion of battery capacity in photovoltaic primary frequency control 3

Research on the dispatch proportion of battery capacity in p...

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3rd IEEE Conference on Energy Internet and Energy system Integration, EI2 2019

作者： Han, Zhijun Luo, Gang Song, Xinrui Yang, Caiming Zhang, Lizong Jia, Yanbing Zhao, Zhou Jin, Yuanwen State Grid Zhejiang Power Co. Ltd. Hangzhou China State Grid Shaoxing Power Supply Company Shaoxing China Taiyuan University of Technology Shanxi Key Lab. of Power System Operation and Control Taiyuan China Shaoxing Jianyuan Power Group Co. Ltd. Shaoxing China

ISBN: (纸本)9781728131375

It is an inevitable problem of frequency control with the increasing capacity of PV connected into large-scale grid. In order to resolve the problem of the contradiction between the increasing demand and dressing supply capacity of frequency control, the requirement of relevant technical for PV to take part in primary frequency control is put forward. The battery-assisted frequency control system is introduced, and the primary frequency control effect can be improved by using its fast response characteristic. In this paper, the ratio of battery output to all power output is used to analyze the primary frequency control gain of the battery participating in the frequency control of the PV plant. The simulation results show that the larger proportion of energy storage system output can bring better frequency control capacity, reduce frequency fluctuations and improve system stability. © 2019 IEEE.

关键词： system stability

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technology Roadmap for Flexible Sensors

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ACS NANO 2023年第6期17卷 5211-5295页

作者： Luo, Yifei Abidian, Mohammad Reza Ahn, Jong-Hyun Akinwande, Deji Andrews, Anne M. Antonietti, Markus Bao, Zhenan Berggren, Magnus Berkey, Christopher A. Bettinger, Christopher John Chen, Jun Chen, Peng Cheng, Wenlong Cheng, Xu Choi, Seon-Jin Chortos, Alex Dagdeviren, Canan Dauskardt, Reinhold H. Di, Chong-an Dickey, Michael D. Duan, Xiangfeng Facchetti, Antonio Fan, Zhiyong Fang, Yin Feng, Jianyou Feng, Xue Gao, Huajian Gao, Wei Gong, Xiwen Guo, Chuan Fei Guo, Xiaojun Hartel, Martin C. He, Zihan Ho, John S. Hu, Youfan Huang, Qiyao Huang, Yu Huo, Fengwei Hussain, Muhammad M. Javey, Ali Jeong, Unyong Jiang, Chen Jiang, Xingyu Kang, Jiheong Karnaushenko, Daniil Khademhosseini, Ali Kim, Dae-Hyeong Kim, Il-Doo Kireev, Dmitry Kong, Lingxuan Lee, Chengkuo Lee, Nae-Eung Lee, Pooi See Lee, Tae-Woo Li, Fengyu Li, Jinxing Liang, Cuiyuan Lim, Chwee Teck Lin, Yuanjing Lipomi, Darren J. Liu, Jia Liu, Kai Liu, Nan Liu, Ren Liu, Yuxin Liu, Yuxuan Liu, Zhiyuan Liu, Zhuangjian Loh, Xian Jun Lu, Nanshu Lv, Zhisheng Magdassi, Shlomo Malliaras, George G. Matsuhisa, Naoji Nathan, Arokia Niu, Simiao Pan, Jieming Pang, Changhyun Pei, Qibing Peng, Huisheng Qi, Dianpeng Ren, Huaying Rogers, John A. Rowe, Aaron Schmidt, Oliver G. Sekitani, Tsuyoshi Seo, Dae-Gyo Shen, Guozhen Sheng, Xing Shi, Qiongfeng Someya, Takao Song, Yanlin Stavrinidou, Eleni Su, Meng Sun, Xuemei Takei, Kuniharu Tao, Xiao-Ming Tee, Benjamin C. K. Thean, Aaron Voon-Yew Trung, Tran Quang Wan, Changjin Wang, Huiliang Wang, Joseph Wang, Ming Wang, Sihong Wang, Ting Wang, Zhong Lin Weiss, Paul S. Wen, Hanqi Xu, Sheng Xu, Tailin Yan, Hongping Yan, Xuzhou Yang, Hui Yang, Le Yang, Shuaijian Yin, Lan Yu, Cunjiang Yu, Guihua Yu, Jing Yu, Shu-Hong Yu, Xinge Zamburg, Evgeny Zhang, Haixia Zhang, Xiangyu Zhang, Xiaosheng Zhang, Xueji Zhang, Yihui Zhang, Yu Zhao, Siyuan Zhao, Xuanhe Zheng, Yuanjin Zheng, Yu-Qing Zheng, Zijian Zhou, Tao Zhu, Bowen Zhu, Ming Zhu, Rong Zhu, Yangzhi Zhu, Yong Zou, Guijin Chen, Xiaodong 08-03 Innovis Singapore 138634 Republic of Singapore Innovative Centre for Flexible Devices (iFLEX) School of Materials Science and Engineering Nanyang Technological University Singapore 639798 Singapore Department of Biomedical Engineering University of Houston Houston Texas 77024 United States School of Electrical and Electronic Engineering Yonsei University Seoul 03722 Republic of Korea Department of Electrical and Computer Engineering The University of Texas at Austin Austin Texas 78712 United States Microelectronics Research Center The University of Texas at Austin Austin Texas 78758 United States Department of Chemistry and Biochemistry California NanoSystems Institute and Department of Psychiatry and Biobehavioral Sciences Semel Institute for Neuroscience and Human Behavior and Hatos Center for Neuropharmacology University of California Los Angeles Los Angeles California 90095 United States Colloid Chemistry Department Max Planck Institute of Colloids and Interfaces 14476 Potsdam Germany Department of Chemical Engineering Stanford University Stanford California 94305 United States Laboratory of Organic Electronics Department of Science and Technology Campus Norrköping Linköping University 83 Linköping Sweden Wallenberg Initiative Materials Science for Sustainability (WISE) and Wallenberg Wood Science Center (WWSC) SE-100 44 Stockholm Sweden Department of Materials Science and Engineering Stanford University Stanford California 94301 United States Department of Biomedical Engineering and Department of Materials Science and Engineering Carnegie Mellon University Pittsburgh Pennsylvania 15213 United States Department of Bioengineering University of California Los Angeles Los Angeles California 90095 United States School of Chemistry Chemical Engineering and Biotechnology Nanyang Technological University Singapore 637457 Singapore Nanobionics Group Department of Chemical and Biological Engineering Monash University Clayton Australia 3800 Monash

Humans rely increasingly on sensors to address grand challenges and to improve quality of life in the era of digitalization and big data. For ubiquitous sensing, flexible sensors are developed to overcome the limitations of conventional rigid counterparts. Despite rapid advancement in bench-side research over the last decade, the market adoption of flexible sensors remains limited. To ease and to expedite their deployment, here, we identify bottlenecks hindering the maturation of flexible sensors and propose promising solutions. We first analyze continued...challenges in achieving satisfactory sensing performance for real-world applications and then summarize issues in compatible sensor-biology interfaces, followed by brief discussions on powering and connecting sensor networks. Issues en route to commercialization and for sustainable growth of the sector are also analyzed, highlighting environmental concerns and emphasizing nontechnical issues such as business, regulatory, and ethical considerations. Additionally, we look at future intelligent flexible sensors. In proposing a comprehensive roadmap, we hope to steer research efforts towards common goals and to guide coordinated development strategies from disparate communities. Through such collab.rative

关键词： soft materials mechanics engineering flexible electronics conformable sensors bioelectronics human-machine interfaces body area sensor networks technology translation sustainable electronics

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Study on Chaff Diffusion and Polarization Stratification

Study on Chaff Diffusion and Polarization Stratification

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2018 IEEE International Conference on Computational Electromagnetics, ICCEM 2018

作者： Cui, Gang Shi, Longfei Ma, Jiazhi Wang, Xuesong National University of Defense Technology State Key Lab. of Complex Electromagnetic Environ. Effects on Electronics and Information System Changsha China

ISBN: (纸本)9781538612415

A new polarization property of chaff cloud is found, differential reflectivity varying with height during diffusion. The differential reflectivity (ZDR) of chaff fiber can be predicted as a function of time and initial orientation. The description of the chaff properties statistical changes from integrated to sectional, which Using this property, distribution curve of differential reflectivity will be plotted after the release of chaff fiber. The results of differential reflectivity stratification can be used as an explanation of the chaff event at the key West, FL KBYX WSR-88D site on 17 June 2016. © 2018 IEEE.

关键词： Polarization

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