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CSEE Journal of Power and Energy Systems 2024年第4期10卷 1799-1807页

作者： Han Cao Puqi Ning yunhao huang Xuhui Wen Wuhan Second Ship Design and Research Institute Wuhan 430205China Key Laboratory of Power Electronics and Electric Drive Institute of Electrical EngineeringChinese Academy of SciencesBeijing 100190China Institute of Electrical Engineering Chinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China Collaborative Innovation Center of Electric Vehicles in Beijing Beijing 100081China

Compared to Si devices,the junction temperature of SiC devices is more critical due to the reliability concern introduced by immature packaging technology applied to new *** paper proposes a practical SiC MOSFET junction temperature monitoring method based on the on-state voltage$\\boldsymbol{V}_{\\mathbf{ds}(\\mathbf{on})}$*** Section II of the paper,the temperature sensitivity of the on-state voltage$\\boldsymbol{V}_{\\mathbf{ds}(\\mathbf{on})}$is *** hardware of the measurement system is set up in Section III,which consists of an On-state Voltage Measurement Circuit(OVMC),the sampling and isolation ***,a calibration method based on the self-heating of the SiC MOSFET chip is presented in Section *** the final Section,the junction temperature is monitored synchronously according to the calibration *** proposed method is applied to a Buck converter and verified by both an Infrared Radiation(IR)camera and a Finite Element Analysis(FEA)tool.

关键词： Junction temperature Silicon Carbide(SiC)MOSFET TSEP

Online Junction Temperature Measurement of Double-sided Cooling IGBT Power Module through On-state Voltage with High Current

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Chinese Journal of Electrical Engineering 2022年第4期8卷 104-112页

作者： Xiaoguang Chai Puqi Ning Han Cao Dan Zheng Huakang Li yunhao huang Yuhui Kang Institute of Electrical Engineering Chinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100190China Wuxi Power Supply Company of State Grid Wuxi 214026China

The aim of this study is to achieve online monitoring of the junction temperature of double-sided-cooling insulated gate bipolar transistor(IGBT)power modules by using the on-state voltage under a high current to maximize the utilization of IGBT power *** junction temperature measurement plays an important role in improving the reliability of the inverter with IGBT,increasing the power density of the motor controller of electric vehicles,and reducing the cost of electric vehicles.

关键词： Double-sided-cooling IGBT junction temperature monitoring on-state voltage with high current

Employee Stock Ownership Plans and Stock-price Informativeness

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China & World Economy 2024年第3期32卷 162-190页

作者： Yuehua Zuo Xin huang Xiaojun Liu yunhao Dai School of Economics Huazhong University of Science and TechnologyChina School of Economics and Modern Economics Research Center Huazhong University of Science and TechnologyChina

This study examines the impact of employee stock ownership plans(ESOPs)on stock-price informativeness in Chinese stock *** findings indicate that firms implementing ESOPs experienced an average 11.89 percent increase in stock-price *** plans improved stock-price informativeness through increased external attention and *** event study shows that ESOPs gave rise to an announcement effect,driven by anticipated performance improvements and the novelty associated with ESOPs.A mechanism analysis demonstrates that the implementation of ESOPs attracted market attention,and the increased market supervision resulting from this mitigated the moral hazards of management associated with *** with more positive signals exerted a greater ***,ESOPs that prioritized management incentives gained more recognition in the *** the incentive effects of ESOPs were weaker than those of equity incentive plans and the ESOPs lost novelty over time,the annual announcement effect diminished *** findings underscore the necessity of strengthening ESOP incentives for continued optimization of priceefficiency.

关键词： announcement effect corporate governance employee stock ownership plan stock-price informativeness

Review of Power Module Automatic Layout Optimization Methods in Electric Vehicle Applications

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Chinese Journal of Electrical Engineering 2020年第3期6卷 8-24页

作者： Puqi Ning Huakang Li yunhao huang Yuhui Kang Institute of Electrical Engineering Chinese Academy of SciencesBeijing 100190China School of Electronic Electrical and Communication EngineeringUniversity of Chinese Academy of SciencesBeijing 100049China

The layout of power modules is a crucial design consideration,especially for silicon carbide *** electrical layout,optimizing the parasitic parameters can improving switching loss and dynamic *** thermal layout,reducing the thermal resistance and controlling thermal capacitance can reduce the local hot *** layout design iterations are based on human knowledge and *** the major drawback of manual design methods is a limited choice of candidates,large time consumption and also the lack of *** the introduce of automatic layout design,these challenges can be overcome which in the meanwhile alleviates current and temperature *** reviewing element representation,placement,routing,fitness evaluation,and the optimization algorithm approaches,a state-of-the-art power module layout design method for electric vehicle applications is introduced.

关键词： Automatic layout design power modules optimization method

Enhancing Photovoltaic Performance of Nonfused-Ring Electron Acceptors via Asymmetric End-Group Engineering and Noncovalently Conformational Locks

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Chinese Journal of Chemistry 2024年第5期42卷 485-490页

作者： Bo Liu Congqi Li Xiaobin Gu Yinghui Han Zhixiang Wei yunhao Cai Xin Zhang Hui huang Yanping Huo School of Chemical Engineering and Light Industry Guangdong University of TechnologyGuangzhouGuangdong510006 China College of Materials Science and Opto-Electronic Technology & Center of Materials Science and Optoelectronics Engineering & CAS Center for Excellence in Topological Quantum Computation & CAS Key Laboratory of Vacuum Physics University of Chinese Academy of SciencesBeijing100049 China College Resources and Environment University of Chinese Academy of SciencesBeijing100049 China Center for Excellence in Nanoscience (CAS) & Key Laboratory of Nanosystem and Hierarchical Fabrication (CAS) National Center for Nanoscience and TechnologyBeijing100190 China

By employing the asymmetric end-group engineering,an asymmetric nonfused-ring electron acceptor(NFREA)was designed and *** with the symmetric analogs(NoCA-17 and NoCA-18),NoCA-19 possesses broader light absorption range,more coplanarπ-conjugated backbone,and appropriate crystallinity according to the experimental and theoretical *** organic solar cells based on J52:NoCA-19 exhibited a power conversion efficiency as high as 12.26%,which is much higher than those of J52:NoCA-17(9.50%)and J52:NoCA-18(11.77%),mainly due to more efficient exciton dissociation,better and balanced charge mobility,suppressed recombination loss,shorter charge extraction time,longer charge carrier lifetimes,and more favorable blend film *** findings demonstrate the great potential of asymmetric end-group engineering in exploring low-cost and high-performance NFREAs.

关键词： Organic solar cells Nonfused-ring electron acceptors Asymmetric end-group engineering Noncovalently conformational locks Low-cost acceptors

铅铋合金环境中高强AlCrFeNi多主元合金的腐蚀行为

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核动力工程 2023年第S1期44卷 137-142页

作者：黄赟浩王健斌王志军赵可中国核动力研究设计院核反应堆系统设计技术重点实验室成都610213 西北工业大学凝固技术国家重点实验室西安710072

传统结构材料限制了铅铋核能系统性能的进一步提高,为给铅铋反应堆提供高性能结构材料,针对高强Al_(17)Cr_(10)Fe_(37)Ni_(36)多主元合金开展了高温静态铅铋合金环境相容性研究。研究表明,在500~600℃的铅铋饱和氧环境下,合金形成致密的... 详细信息

传统结构材料限制了铅铋核能系统性能的进一步提高,为给铅铋反应堆提供高性能结构材料,针对高强Al_(17)Cr_(10)Fe_(37)Ni_(36)多主元合金开展了高温静态铅铋合金环境相容性研究。研究表明,在500~600℃的铅铋饱和氧环境下,合金形成致密的Fe-Cr-Al-O氧化膜与疏松的氧化铁双层氧化膜结构,双层氧化膜厚度仅有1.5μm,氧化膜生长速率极低;Fe-Cr-Al-O氧化膜在高温铅铋环境具有极佳的致密性、结构与组织稳定性,显著保护了液态铅铋向基体溶解。相比于传统的铁素体/马氏体钢(F/M钢)、奥氏体不锈钢,Al_(17)Cr_(10)Fe_(37)Ni_(36)多主元合金在高温铅铋环境中应用具有明显的优势。

关键词：铅铋合金 Al_(17)Cr_(10)Fe_(37)Ni_(36)多主元合金腐蚀

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基于数据表示不变性的域泛化研究

图学学报 2024年第4期45卷 705-713页

作者：倪云昊黄雷北京航空航天大学人工智能研究院北京100191 北京航空航天大学复杂关键软件环境全国重点实验室北京100191

域泛化是人工智能近几年非常热门的一个研究方向,希望在不同的数据分布中学习到与任务相关的不变表征,即移除不同域在学习任务中的影响,从而提升模型的域泛化能力。为提升模型域泛化能力,利用基于不变性风险最小化的思想,具体将神经网... 详细信息

域泛化是人工智能近几年非常热门的一个研究方向,希望在不同的数据分布中学习到与任务相关的不变表征,即移除不同域在学习任务中的影响,从而提升模型的域泛化能力。为提升模型域泛化能力,利用基于不变性风险最小化的思想,具体将神经网络分为特征提取器和不变性分类器进行分别探究。在特征提取器上,采用了基于牛顿迭代的组白化方法来控制激活值的分布,从而使得不同的图像经过神经网络后能够去除部分域信息,以求达到域泛化的目的;在不变性分类器上,探究了特征和权重的规范化方法对模型域泛化效果的影响,并提出了基于余弦相似度损失函数的雪花算法,该算法提升了模型域泛化的准确率。此外,提供了关于雪花算法的理论推导并做了深入分析,为实验提供了理论支撑。

关键词：域泛化不变风险最小化组白化迭代白化雪花算法

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基于云边协同的变电站倒闸操作平台设计与实现

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电网技术 2023年第2期47卷 833-841页

作者：陈建洪黄运豪林静怀刘东陈郑平狄方春国网福建省电力有限公司福建省福州市350003 电力调度自动化技术研究与系统评价北京市重点实验室(中国电力科学研究院有限公司) 北京市海淀区100192

随着智能电网技术的快速发展,变电站综合自动化技术取得了显著的提高。但监控与运维自动操作功能尚不完善,倒闸操作大多依赖于传统的人工逐项依次操作的方式,倒闸效率低下,已远远不能适应电力系统的发展需求。该文基于调控云平台利用云... 详细信息

随着智能电网技术的快速发展,变电站综合自动化技术取得了显著的提高。但监控与运维自动操作功能尚不完善,倒闸操作大多依赖于传统的人工逐项依次操作的方式,倒闸效率低下,已远远不能适应电力系统的发展需求。该文基于调控云平台利用云边协同技术实现调令、操作票、预演、操作全流程一体化在线协同管控,提高变电站倒闸操作效率与准确性。首先依据变电站倒闸操作过程中云防误中心与防误子站、移动终端的业务角色确立了云端和边缘侧,然后基于倒闸操作全流程设计了云边交互、云边协同机制,形成了状态全感知、防误全过程、操作全在线、业务全协同”倒闸防误操作平台,并引入信誉机制提高边缘节点的防误可信度,通过实验对云–边模型性能评估、系统可扩展性、防误准确性等方面进行了验证分析,结果表明所设计的云边协同倒闸防误操作平台在在提升倒闸操作效率和准确性方面具有一定的优势。

关键词：调控云云边交互云边协同倒闸防误

铊在土壤环境中的行为及其生态毒理学研究进展

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安全与环境工程 2022年第3期29卷 146-154页

作者：刘仕翔宁晖黄允豪罗泽娇广西博世科环保科技股份有限公司土壤环境修复事业部广西南宁530007 武汉一洋环保科技有限公司湖北武汉430205 中国地质大学(武汉)环境学院湖北武汉430078

铊是一种典型的分散、剧毒元素,相较于Cd、Cu、Pb、Hg等常见的重金属元素,铊表现出更高的毒性,但由于其在地壳中丰度低,现有研究及标准制定过程中对其关注较少。伴随着含铊矿石的开采与利用,大量铊被释放到地表环境中,造成严重的土壤和... 详细信息

铊是一种典型的分散、剧毒元素,相较于Cd、Cu、Pb、Hg等常见的重金属元素,铊表现出更高的毒性,但由于其在地壳中丰度低,现有研究及标准制定过程中对其关注较少。伴随着含铊矿石的开采与利用,大量铊被释放到地表环境中,造成严重的土壤和水体铊污染,铊污染防治工作形势严峻。通过整理近年来国内外研究报道和相关规范标准,针对土壤中铊的评价标准、污染现状、迁移转化行为、生态毒性和修复技术等进行了综述,并基于现阶段研究存在的不足,提出了今后的研究方向。

关键词：铊土壤环境生态毒理学迁移行为

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惜春大观园居所建筑意境探微

曹雪芹研究 2019年第4期 132-138页

作者：黄云皓北京市海淀区100091

本文对《红楼梦》中惜春大观园居所的建筑意象进行了深入探微,揭示出其居所具有多重的建筑意象和象征寓意。曹雪芹在构思惜春居所时,饱含艺术匠心,达到了建筑空间与人物情节情景交融、相得益彰的艺术效果。

关键词：蓼风轩藕香榭暖香坞建筑意象