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Centralized control of parallel connected power conditioning system in electric vehicle charge-discharge and storage integration station

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Journal of Modern Power Systems and Clean Energy 2015年第2期3卷 269-276页

作者： Jiuqing CAI changsong chen Peng LIU Shanxu DUAN State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhanChina

This study presents a centralized control scheme that coordinates parallel operations of power conditioning system(PCS)for the grid interactions of electric vehicles(EVs)in EV charge-discharge and storage integration *** issues for the control and operation of PCS under various operation modes are discussed,including vehicle to grid(V2G)mode,stand-alone mode and seamless transfer *** intelligent multi-mode charge-discharge method is utilized for the V2G mode,and the parallel control method based on communication network is adopted for the standalone *** addition,a novel seamless transfer strategy is proposed,which is able to implement PCS transition between V2G mode and stand-alone *** detailed process of the seamless transfer between the two modes is *** results are presented to show the performance and feasibility of this strategy.

关键词： Centralized control Power conditioning system(PCS) Charge-discharge and storage integration station Vehicle to grid(V2G) Seamless transfer

Free-standing ZnO nanorod arrays modified with single-walled carbon nanotubes for betavoltaics and photovoltaics

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Journal of Materials Science & Technology 2020年第19期54卷 48-57页

作者： changsong chen Jiang chen Zhen Wang Jian Zhang Haisheng San Shichao Liu Chunyu Wu Werner Hofmann Pen-Tung Sah Institute of Micro-Nano Science and Technology Xiamen UniversityXiamen 361005China Shenzhen Research Institute of Xiamen University Shenzhen 518000China College of Energy Xiamen UniversityXiamen 361005China Shanghai Institute of Space Power-Sources Shanghai 200245China Institute of Solid State Physics Technical University of BerlinBerlin 10623Germany

A full-duplex radiant energy converter based on both betavoltaic and photovoltaic effects in an easyto-implement way is an attractive alternative for the autonomous wireless sensor ***,we report a novel beta/photovoltaic cell based on free-standing Zn O nanorod arrays(ZNRAs)modified with metallic single-walled carbon nanotubes(m-SWCNTs),using radioisotope63 Ni as beta-emitting *** ZNRAs were grown on Al-doped Zn O(AZO)conductive glass using hydrothermal *** optimum length and diameter of Zn O nanorods were determined by Monte Carlo simulation for beta energy deposition in *** m-SWCNTs were anchored into the ZNRAs to form a three-dimensional(3-D)Schottky junction structure for effectively separating the beta/photo-excited electron-hole ***,the betavoltaic and photovoltaic effects were confirmed through the I-V measurements of beta/photovoltaic cells under beta/UV/Vis irradiations,*** is suggested that the m-SWCNTs play key role for the enhancement of beta/photovoltaic performance through the formation of extensive3-D Schottky junction,the conductive network for hole transport,and the surface plasmon resonance exciton absorption for visible light.

关键词： ZnO nanorod arrays Single-walled carbon nanotube Betavoltaics Photovoltaics

Key Management for Outsourced Data Security

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Wuhan University Journal of Natural Sciences 2014年第5期19卷 449-454页

作者： PEI Bei chen changsong WAN Changsheng The Third Research Institute of Ministry of Public Security School of Information Science and Engineering Southeast University

This paper analyzes the efficiency and security of bi- linear-map-based schemes and brings about an AAA based publicly auditable scheme for cloud computing, which is much more efficient. In this scheme, a trust model including four entities is designed to provide both integrity and confidentiality protection. The proposed scheme can be proved to achieve the security goals that no cheating cloud server can pass the auditing without storing users＇ data intact. The efficiency of the proposal is evaluated by analyzing the fulfillment of the design goals, including the computation cost, communication cost and storage cost of our scheme. This light weight publicly auditable Proof-of-storage scheme achieves security goals perfectly, and has an excellent efficiency performance superior to the current bilinear-map-based publicly auditable Proof-of-storage scheme.

关键词： cloud computing malicious cloud server key management

Optimization of Agrobacterium tumefaciens-Mediated Transformation Systems in Tea Plant(Camellia sinensis)

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Horticultural Plant Journal 2017年第3期3卷 105-109页

作者： LV Qianru chen changsong XU Yijuan HU Shunkai WANG Le SUN Kang chen Xuan LI Xinghui Tea Research Institute Nanjing Agricultural University Tea Research Institute Fujian Academy of Agricultural Sciences

In this study, an efficient plant regeneration protocol in vitro and transformation by Agrobacterium-mediated method of Camellia sinensis was achieved, which would lay the foundation for genetic improvement of tea plant by genetic engineering technology. The cotyledon callus of *** were used as the receptors for transformation by Agrobacterium tumefaciens EHA105 containing PS1aG-3. Some factors which affected the result of Agrobacterium-mediated transformation of C. sinensis were studied on the basis of GUS transient expression system. The optimum system of Agrobacterium-mediated transformation was that the cotyledon callus were pre-cultured for 3 d, and then infected by EHA105 for 15 min followed by 3 d co-culture in the dark on the YEB medium containing 150 μmol·L^(-1) acetosyringone(AS). The transient expression rate of GUS gene was 62.6%. After being delayed selective culture for 3 d, infected callus were transferred into the differentiation medium and the root induction medium both of which were supplemented with 100 mg·L^(-1) spectinomycin, and then resistant seedlings of C. sinensis were obtained. The conversion rate was 3.6%.

关键词： Camellia sinensis cotyledon callus Agrobacterium-mediated GUS transient expression transformation ratio

Roles of trichomes in tea plant resistance against multiple abiotic and biotic stresses

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Beverage Plant Research 2022年第1期2卷 103-115页

作者： Penghui Li Yanrui Zhang Zhili Ye Hao Zuo Ping Li Xuecheng Zhao Zhihui chen changsong chen Jian Zhao State Key Laboratory of Tea Plant Biology and Utilization Anhui Agricultural UniversityHefei 230036China Tea Research Institute Fujian Academy of Agricultural SciencesFuzhou 350013China

Tea trichomes contribute significantly to tea flavors by providing diverse and specific flavor-determining metabolites,including catechins,caffeine,theanine,and ***,not much is known about the physiological functions of tea trichomes in tea plant adaptation to complex environments,nor the trichome *** trichomes not only build up chemical defenses,but also act as the first physical barrier protecting herbivore attacks,reflecting high light and UV-B radiation,and preventing water ***,transcriptome profiling on the tea trichomes compared with the trichome-removed leaves also showed that tea trichomes highly expressed numerous defense-related genes involved in protection from high light and UV-B radiation,cold stress,disease resistance signal transduction,anti-herbivore or anti-abiotic peptide biosynthesis,and other defense *** pieces of experimental evidence supported the notes,highlighting the roles of tea trichomes in plant defenses against both abiotic and biotic *** study provides fresh insights into the multiple protective functions of tea trichome for tea plant adaptation to harsh *** new understanding on tea trichomes could benefit the development of better breading strategy for new tea varieties with greater adaption and tolerance to changing environmental challenges.

关键词： resistance protective removed

带飞跨电容的三电平全桥直流变换器输入中点电压的自平衡分析

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电工技术学报 2018年第18期33卷 4335-4344页

作者：刘朋陈昌松段善旭华中科技大学电气与电子工程学院强电磁工程与新技术国家重点实验室武汉430074

输入中点电压平衡问题通常是三电平拓扑的研究重点,但是在现有的文献中针对三电平全桥(TLFB)直流变换器的输入中点电压平衡问题还没有深入分析。针对TLFB直流变换器,给出其详细的模态分析,进而揭示其中点电压偏移的原因,并说明飞跨电容... 详细信息

输入中点电压平衡问题通常是三电平拓扑的研究重点,但是在现有的文献中针对三电平全桥(TLFB)直流变换器的输入中点电压平衡问题还没有深入分析。针对TLFB直流变换器,给出其详细的模态分析,进而揭示其中点电压偏移的原因,并说明飞跨电容能带来中点电压自平衡的功能。首先通过对比无飞跨电容的三电平半桥(TLHB)和TLFB变换器的供电模态,指出在对管关断不一致的情况下,TLFB电路也会出现单个分压电容提供负载电流的模态,从而导致输入中点电压偏移;之后针对带飞跨电容的TLFB电路进行模态分析,证明即使在对管关断不一致的情况下,飞跨电容的引入能极大缓解中点电压的偏移,从而实现自平衡;最后分析稳态情况下偏移电压的影响因素,推导带飞跨电容的TLFB电路中点电压稳态误差的数学表达式,该表达式能够对TLFB变换器中飞跨电容的设计提供理论指导。通过仿真和实验验证了所提方法的有效性。

关键词：三电平全桥直流变换器中点电压平衡飞跨电容

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电视广告的符号学解读

新闻界 2007年第6期 33-34,40页

作者：陈长松淮阴师范学院信息传播与技术系淮安223300

本文运用符号学的相关理论,分析了电视广告符号"能指"的"无根""漂移"现象以及由此造成的符号"意指链"的脆弱性现象;并借助"陌生化"理论探讨了电视广告符号制作的"陌生化"趋势。

关键词：电视广告陌生化能指

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悬索桥索股架设全过程的非线性精确分析

西南交通大学学报 2007年第1期42卷 44-48页

作者：陈常松苏龙颜东煌长沙理工大学桥梁与结构工程学院湖南长沙410076

为精确分析悬索桥主缆的成缆过程,基于悬索桥多跨悬链线空缆线形计算原理,分析了主缆索股架设过程中塔的受力与索股线形的变化规律.将索塔对主索鞍的作用等效成非线性弹簧,其刚度计入索塔的梁柱效应,导出了索塔的非线性抗推刚度和塔底... 详细信息

为精确分析悬索桥主缆的成缆过程,基于悬索桥多跨悬链线空缆线形计算原理,分析了主缆索股架设过程中塔的受力与索股线形的变化规律.将索塔对主索鞍的作用等效成非线性弹簧,其刚度计入索塔的梁柱效应,导出了索塔的非线性抗推刚度和塔底截面弯矩的计算公式;根据悬索桥主缆索股架设方法,以空缆状态为基础,计算并分析了一座主跨1280 m的悬索桥索股架设过程中主索鞍处主缆的不平衡力、塔顶水平位移和塔底截面弯矩随索股架设的变化规律.研究表明,索股架设过程中,梁柱效应较小.

关键词：桥梁工程悬索桥主缆索股悬链线等效刚度

一种基于离散空间矢量调制的Vienna整流器模型预测控制方法

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中国电机工程学报 2019年第20期39卷 6008-6016页

作者：朱文杰陈昌松段善旭强电磁工程与新技术国家重点实验室(华中科技大学)

应用于三相整流器的有限控制集-模型预测控制(finite control set model predictive control,FCS-MPC)方法以指标函数最小为目标,遍历计算输出单一最优电压矢量,开关频率不固定,输入电流品质依赖较高的采样频率。该文提出一种基于离散... 详细信息

应用于三相整流器的有限控制集-模型预测控制(finite control set model predictive control,FCS-MPC)方法以指标函数最小为目标,遍历计算输出单一最优电压矢量,开关频率不固定,输入电流品质依赖较高的采样频率。该文提出一种基于离散空间矢量调制(discretespacevector modulation,DSVM)的Vienna整流器模型预测控制方法。该方法采用由实矢量线性组合而成的虚拟矢量,在一个采样周期内可输出多个实矢量,能固定开关频率;通过引入虚拟矢量,增加预测控制中的可控矢量集,能有效减少参考电压和预测电压之间的误差,从而降低输入电流总谐波畸变率(total harmonics distortion,THD)。该文分析虚拟矢量及其调制方式,给出DSVM-MPC的实现方法。为验证所提DSVMMPC方法的正确性,与常规FCS-MPC方法进行仿真和实验对比分析,结果表明所提方法可提高输入电流品质。

关键词： Vienna整流器模型预测控制虚拟矢量离散空间矢量调制总电压误差