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一种新型多输入/单输出DC-DC变换器研究

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电气传动 2019年第7期49卷 48-53页

作者：曾进辉张伯伦孙志峰罗仔翼莫霜叶阳文闯湖南工业大学电气与信息工程学院湖南株洲412000 电传动控制与智能装备湖南省重点实验室湖南株洲412000

提出了一种高集成可扩展的新型多输入/单输出(MIO)DC-DC变换器拓扑结构,所提变换器可满足不同形式新能源的混合接入。相比于传统的多输入Buck-Boost变换器,新型DC/DC变换器不需要额外增加变压器,在体积与成本优化上更具优势。同时,所提... 详细信息

提出了一种高集成可扩展的新型多输入/单输出(MIO)DC-DC变换器拓扑结构,所提变换器可满足不同形式新能源的混合接入。相比于传统的多输入Buck-Boost变换器,新型DC/DC变换器不需要额外增加变压器,在体积与成本优化上更具优势。同时,所提变换器具备Buck,Boost,Buck-Boost等3种独立运行模态,各模态切换简单可行,能够满足不同的运行需要。针对所提变换器,重点分析了其电感电流连续导通模式(CCM)和断流模式(DCM)的运行特性,并通过仿真与实验验证了所提拓扑的可行性与理论分析的正确性。

关键词： DC-DC变换器拓扑结构连续导通模式断流模式

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基于综合能量最优补偿的动态电压恢复器

电测与仪表 2021年第3期58卷 105-111页

作者：曾进辉宋志杰兰征何佳奇赵勇超骆娇湖南工业大学电气与信息工程学院湖南株洲412007 电传动控制与智能装备湖南省重点实验室湖南株洲412007

为实现动态电压恢复器(DVR)对暂降电压幅值和相位补偿的同时,减少能量的损耗,延长补偿时间,最大程度减小暂降电压对负载的影响,文中提出了一种综合能量最优补偿策略。通过分析综合能量最优补偿过程,得出补偿相量图和解析式,并讨论了该... 详细信息

为实现动态电压恢复器(DVR)对暂降电压幅值和相位补偿的同时,减少能量的损耗,延长补偿时间,最大程度减小暂降电压对负载的影响,文中提出了一种综合能量最优补偿策略。通过分析综合能量最优补偿过程,得出补偿相量图和解析式,并讨论了该策略的极限补偿问题。分析补偿电压幅值、输出有功与相关物理量之间的数学关系式和关联曲线,得出最优补偿条件。通过MATLAB/Simulink进行仿真实验,分析了不同程度的电压暂降补偿效果,仿真结果验证了所提补偿策略的有效性。

关键词：动态电压恢复器综合能量最优补偿极限补偿补偿特性

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基于静态开关技术的直流断路器仿真

湖南工业大学学报 2018年第1期32卷 49-54页

作者：雷敏袁兰兰曾进辉莫霜叶湖南工业大学电气与信息工程学院湖南株洲412007

综合机械开关的静态特性与电力电子开关的动态特性,能够实现快速且无弧的故障开断。基于此,提出了一种高速机械开关与双向集成门控晶闸管组件并联的组合新型拓扑结构,分析了混合式直流断路器的电路工作原理,并在Matlab/Simulink环境下... 详细信息

综合机械开关的静态特性与电力电子开关的动态特性,能够实现快速且无弧的故障开断。基于此,提出了一种高速机械开关与双向集成门控晶闸管组件并联的组合新型拓扑结构,分析了混合式直流断路器的电路工作原理,并在Matlab/Simulink环境下搭建了实验仿真模型。所得仿真结果表明,所提出的断路器实现了故障在零电压情况下的无弧开断,且比传统直流断路器更为快速,故障切除后能够有效抑制过电压及故障电流的上升速率。

关键词：直流断路器静态开关模块无弧中断电流换向

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微电网多端口变换器拓扑结构研究综述

分布式能源 2017年第6期2卷 1-7页

作者：曾进辉何智成孙志峰张伯伦湖南工业大学电气与信息工程学院湖南株洲412008

发展微电网已成为破解高渗透率分布式能源高效、安全接入电网的客观需要,多端口变换器(multi-port converters,MPC)作为微电网中电能转换的核心装置,在微电网的建设中有着巨大的应用价值和广阔的应用前景。首先,分析了电能变换器拓扑结... 详细信息

发展微电网已成为破解高渗透率分布式能源高效、安全接入电网的客观需要,多端口变换器(multi-port converters,MPC)作为微电网中电能转换的核心装置,在微电网的建设中有着巨大的应用价值和广阔的应用前景。首先,分析了电能变换器拓扑结构的发展过程,并在其基础上对国内外适用于微电网的二端口变换器、三端口变换器、四端口变换器以及多端口变换器的典型拓扑结构进行了分析和比较。然后,指出多端口变换器在功率密度、转换效率以及变流功能等方面具有传统双端口变换器不可比拟的优势,是未来电能变换器的发展方向。最后,在拓扑结构、潮流控制以及运行可靠性等方面指出多端口变换器在工程应用中亟待解决的几个关键技术问题,并从多个方面分析了微电网多端口变换器的发展趋势。

关键词：微电网多端口变换器(MPC) 功率密度拓扑结构电能路由器电能转换转换效率

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高海拔地区变电站外绝缘及空气间隙设计

湖南工业大学学报 2018年第5期32卷 32-38页

作者：廖晓宇樊非之肖强晖曾进辉湖南工业大学电气与信息工程学院湖南株洲412007 湖南省电力勘探设计院湖南长沙410000

针对我国实际应用中西藏高海拔地区的外绝缘水平及空气间隙与平原地区不同的问题,为得到高海拔设计经验,通过实地实验获得的图形曲线,提出了将实际环境与理论公式相结合的方法,并结合设计规范中的修正公式得到了修正结论。结果表明:工... 详细信息

针对我国实际应用中西藏高海拔地区的外绝缘水平及空气间隙与平原地区不同的问题,为得到高海拔设计经验,通过实地实验获得的图形曲线,提出了将实际环境与理论公式相结合的方法,并结合设计规范中的修正公式得到了修正结论。结果表明:工程应用的爬电比距可通过统一爬电比距和现场污染度的关系经公式修正得到,且可通过计算得出绝缘子片数在工程中的实际用量,还可通过结合实验图形和修正公式得出实际应用的外绝缘水平以及空气间隙。

关键词：超高海拔环境外绝缘水平爬电距离空气间隙

CHDbase:A Comprehensive Knowledgebase for Congenital Heart Disease-related Genes and Clinical Manifestations

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Genomics, Proteomics & Bioinformatics 2023年第1期21卷 216-227页

作者： Wei-Zhen Zhou Wenke Li Huayan Shen Ruby W.Wang Wen Chen Yujing Zhang Qingyi zeng Hao Wang Meng Yuan Ziyi zeng jinhui Cui Chuan-Yun Li Fred Y.Ye Zhou Zhou State Key Laboratory of Cardiovascular Disease Beijing Key Laboratory for Molecular Diagnostics of Cardiovascular DiseasesCenter of Laboratory MedicineFuwai HospitalNational Center for Cardiovascular DiseasesChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100037China International Joint Informatics Laboratory&Jiangsu Key Laboratory of Data Engineering and Knowledge Service School of Information ManagementNanjing UniversityNanjing 210023China Institute of Molecular Medicine Peking UniversityBeijing 100871China

Congenital heart disease(CHD)is one of the most common causes of major birth defects,with a prevalence of 1%.Although an increasing number of studies have reported the etiology of CHD,the findings scattered throughout the literature are difficult to retrieve and utilize in research and clinical *** therefore developed CHDbase,an evidence-based knowledgebase of CHD-related genes and clinical manifestations manually curated from 1114 publications,linking 1124 susceptibility genes and 3591 variations to more than 300 CHD types and related *** such as the information of each publication and the selected population and samples,the strategy of studies,and the major findings of studies were integrated with each item of the research *** also integrated functional annotations through parsing50 databases/tools to facilitate the interpretation of these genes and variations in disease *** further prioritized the significance of these CHD-related genes with a gene interaction network approach and extracted a core CHD sub-network with 163 *** clear genetic landscape of CHD enables the phenotype classification based on the shared genetic ***,CHDbase provides a comprehensive and freely available resource to study CHD susceptibilities,supporting a wide range of users in the scientific and medical *** is accessible at http://***.

关键词： Congenital heart disease Congenital heart defect Database Genetics Classification

Eco-districts in France:What tools to ensure goals achievement?

维普期刊数据库评论

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Science China Earth Sciences 2020年第6期63卷 865-874页

作者： Kathleen BOQUET Charline FROITIER jinhui LI Kaihua XU Xianlai zeng State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China Higher Institute for Environmental Engineering and Management MINES ParisTechParis Cedex 06France GEM Company Limited Shenzhen 518101China

Globally,to build cities and communities more inclusive,safe,resilient and sustainable is one of the most important sustainable development ***-districts in cities emerged as an answer to current global environmental concerns and have been developed in France since the *** objective of this work is to gather operational feedback from sustainable neighborhood projects owners to better understand the key barriers of such projects and how to overcome them.A case study of the eco-district Les Tanneries,Lingolsheim showed that the carbon footprint of each inhabitant annually amounted to 4 tons CO2 equivalent,more than half of the French *** for improvements were clearly identified regarding transports and food carbon *** for energy consumption,social diversity and density reached the level of the eco-districts average.A governance review pointed out some superior practices such as the formalization of a specification requirements handbook,a competition between project management teams,and the use of neighborhood sustainability assessment tools to measure and track changes in *** validated tools and obtained results can be useful in building sustainable cities and even China’s ecological civilization.

关键词： Geography and environment City management Eco-district Sustainability Assessment France

α硫辛酸联合贝那普利对早期糖尿病肾病患者尿微量白蛋白排泄率与血清超敏C反应蛋白水平的影响

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中国药师 2016年第8期19卷 1497-1499页

作者：曾锦辉罗芳涛林鹭平沈小燕张劼厦门市第二医院内分泌科福建厦门361021

目的:观察α硫辛酸联合贝那普利对早期糖尿病肾病患者尿微量白蛋白排泄率(UAER)与血清超敏C反应蛋白(hsCRP)水平的影响。方法:64例早期糖尿病肾病住院患者随机分成两组,每组32例。A组予贝那普利片10 mg,po,qd;B组在A组基础上加用α硫辛... 详细信息

目的:观察α硫辛酸联合贝那普利对早期糖尿病肾病患者尿微量白蛋白排泄率(UAER)与血清超敏C反应蛋白(hsCRP)水平的影响。方法:64例早期糖尿病肾病住院患者随机分成两组,每组32例。A组予贝那普利片10 mg,po,qd;B组在A组基础上加用α硫辛酸600 mg,ivd,qd。疗程均为2周。比较两组患者治疗前后血糖、血脂、UAER、hs-CRP等指标变化。结果:治疗后,两组UAER均较治疗前明显下降(P0.05)。结论:α硫辛酸联合贝那普利可有效治疗早期糖尿病肾病,降低hs-CRP水平,效果优于单独应用贝那普利。

关键词：糖尿病肾病 α硫辛酸贝那普利尿微量白蛋白排泄率血清超敏C反应蛋白

Spectroscopic studies of dye-surfactant interactions with the co-existence of heavy metal ions for foam fractionation

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Journal of Environmental Sciences 2012年第12期24卷 2068-2074页

作者： Dongmei Zhang Guangming zeng jinhui Huang Wenkai Bi Gengxin Xie College of Environmental Science and Engineering Hunan UniversityChangsha 410082China Key Laboratory of Environmental Biology and Pollution Control Hunan UniversityMinistry of EducationChangsha 410082China

The interaction between a cationic dye Methylene Blue （MB） and an anionic surfactant sodium dodecyl sulfate （SDS） with the presence of Cd2＋ was investigated spectrophotometrically in a certain concentration range. The spectrophotometric measurements of dye-metal ion-surfactant system were carried out. The results indicated that the SDS concentration had a significant influence on the dye spectrum, while the addition of Cd2~ hardly caused change of the maximum value of absorbance. According to this observation, we concluded that electrostatic and hydrophobic interaction between dye and surfactant occurred up to a certain level, and the homo-ions Cd2＋ almost exerted no effect on the dye-surfactant complexation, establishing a theoretical foundation for simultaneous removal of organic dye and heavy metal using foam fractionation. Meanwhile, the effects of their interaction on foam performance were investigated. The results showed that the addition of Cd2＋ favored the tendency to ameliorate foam properties just contrary to MB. The feasibility of foam separation for dye and heavy metal removal from simulated wastewater was also confirmed using a continuous foam fractionator. In the simultaneous removal process, with the initial SDS concentration ranging from 0.5 to 5.0 retool/L, the maximum removal efticiencies of MB and Cd2＋ were obtained as 99.69% and 99.61%, respectively. The enrichment ratios were reduced from 24.34 to 7.65 for MB and from 22.01 to 3.35 for Cd2＋.

关键词： foam fractionation simultaneous removal spectroscopic study SDS MB Cd2+