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Large-scale evaluation of pea(Pisum sativum L.)germplasm for cold tolerance in the field during winter in Qingdao

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The Crop Journal 2016年第5期4卷 377-383页

作者： Xiaoyan Zhang shuwei wan Junjie Hao Jinguo Hu Tao Yang Xuxiao Zong Qingdao Academy of Agricultural Sciences Qingdao 266100China National Key Facility for Crop Gene Resources and Genetic Improvement/Institute of Crop Science Chinese Academy of Agricultural SciencesChina USDA Agricultural Research ServiceWestern Regional Plant Introduction StationWashington State UniversityPullmanWA 99164USA

As a cool-season crop, pea(Pisum sativum L.) can tolerate frost at the vegetative stage but experiences yield loss when freezing stress occurs at the reproductive stage. Cold-tolerance improvement of pea varieties is important for stable yield and expansion of the winter pea planting area. Under natural low-temperature conditions during winter in Qingdao,Shandong, China, we evaluated the cold tolerance of 3672 pea germplasm accessions in the field and categorized them as displaying high resistance(214), moderate resistance(835), or susceptibility(2623). The highly and moderately resistant genotypes were validated in the following year. We found that genotypes from the winter production region showed higher cold tolerance than genotypes from the spring production region. The accessions identified as having high levels of cold tolerance are recommended as potential genetic resources in cold-tolerance breeding of pea.

关键词： Pisum sativum L. Cold tolerance Germplasm evaluation Open-field experiment

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考虑配电网三相不平衡性的台区降损方法研究

自动化仪表 2024年第5期45卷 40-44页

作者：胡文骆凯波万树伟钟爱叶大勇国网重庆电力公司营销服务中心重庆400000 北京中电普华信息技术有限公司北京100192

目前,台区损耗的影响因素较多,存在三相电流差异大、线路损耗和功率损耗高的三相不平衡问题。为了提高配电台区的供电质量,提出考虑配电网三相不平衡性的台区降损方法。分析了三相不平衡对台区损耗产生的影响。在分析结果的基础上,将最... 详细信息

目前,台区损耗的影响因素较多,存在三相电流差异大、线路损耗和功率损耗高的三相不平衡问题。为了提高配电台区的供电质量,提出考虑配电网三相不平衡性的台区降损方法。分析了三相不平衡对台区损耗产生的影响。在分析结果的基础上,将最小化三相电流在台区中的不平衡度、控制自动换相装置、在台区运行过程中调整开关次数最小作为优化目标。通过建立台区降损优化目标函数和采用遗传算法求解目标函数,获得台区降损优化目标函数的最优解。通过调整三相不平衡,完成台区的降损优化。试验结果表明,采用所提方法优化后,三相电流的值基本相符,且线路损耗、功率损耗减小。该方法有效降低了台区损耗。

关键词：三相不平衡优化改造遗传算法台区损耗目标函数开关次数适应度函数二进制编码

The role of low air pressure in the variation of negative corona-generated space charge in a rod to plane electrode

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High Voltage 2018年第2期3卷 126-132页

作者： Bian XingMing Zhu JunYu Yang Wei wan shuwei Qi Lei Li XueBao Li HaiBing State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power UniversityBeijing 102206People's Republic of China State Key Laboratory of Advanced Transmission Technology Global Energy Interconnection Research InstituteBeijing 102211People's Republic of China State Grid Chongqing Nan'an Power Supply Company Chongqing 400060People's Republic of China

The corona-generated space charge may vary in different air pressures,and the quantitative law between the corona-generated space charge density and air pressure has never been *** work utilised computational approaches to explore the role of air pressure in the variation of negative corona-generated space charge.A negative fluid model in which the air pressure could be varied was built up to calculate the charged-particle density and electric field under different applied *** continuity equations were solved by flux corrected transport algorithm and the Poisson equation was computed by the successive over relaxation *** variations of important parameters due to air pressure were *** particles densities of electrons,positive ions and negative ions at standard and low atmosphere pressures were computed,which increased markedly due to the decrease of atmosphere *** fixed applied voltages,the exponential decay law between the maximal values of electron/positive ion densities at the head of the streamer and air pressure could be *** quantitative law between the maximal values of electron/positive ion densities at the head of the streamer and the applied voltage,relative air density was also achieved.

关键词： method charge maximal

High-Power and Ultralong-Life Aqueous Zinc-Ion Hybrid Capacitors Based on Pseudocapacitive Charge Storage

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Nano-Micro Letters 2019年第4期11卷 650-658页

作者： Liubing Dong wang Yang Wu Yang Chengyin wang Yang Li Chengjun Xu shuwei wan Fengrong He Feiyu Kang Guoxiu wang Centre for Clean Energy Technology Faculty of ScienceUniversity of Technology SydneySydneyNSW 2007Australia School of Chemistry and Chemical Engineering Yangzhou UniversityYangzhou 225002People’s Republic of China School of Photovoltaic and Renewable Energy Engineering University of New South WalesSydneyNSW 2052Australia Shenzhen Geim Graphene Center Tsinghua Shenzhen International Graduate SchoolTsinghua UniversityShenzhen 518055People’s Republic of China HEC Group Pty Ltd CanterburyVIC 3216Australia

Rechargeable aqueous zinc-ion hybrid capacitors and zincion batteries are promising safe energy storage *** this study,amorphous RuO2·H2O for the first time was employed to achieve fast and ultralong-life Zn2+storage based on a pseudocapacitive storage *** the RuO2·H2O||Zn zinc-ion hybrid capacitors with Zn(CF3SO3)2 aqueous electrolyte,the RuO2·H2O cathode can reversibly store Zn2+in a voltage window of 0.4-1.6 V(***/Zn2+),delivering a high discharge capacity of 122 mAh g?*** particular,the zinc-ion hybrid capacitors can be rapidly charged/discharged within 36 s with a very high power density of 16.74 kW kg?1 and a high energy density of 82 Wh kg?***,the zinc-ion hybrid capacitors demonstrate an ultralong cycle life(over 10,000 charge/discharge cycles).The kinetic analysis elucidates that the ultrafast Zn2+storage in the RuO2·H2O cathode originates from redox pseudocapacitive *** work could greatly facilitate the development of high-power and safe electrochemical energy storage.

关键词： Zinc-ion hybrid capacitor Hydrous ruthenium oxide Ultralong life Redox pseudocapacitance High power

Differentially Expressed MicroRNAs Associated with Vein Graft Restenosis in Rats

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Cardiovascular Innovations and Applications 2020年第3期5卷 45-55页

作者： shuwei wan Hui Cao Yubo Zhao Yaming Guo Chuang Li Nan Li Can Cao Zhaohui Hua Zhen Li Department of Endovascular Surgery The First Affi liated HospitalZhengzhou UniversityZhengzhou450000 HenanPeople’s Republic of China

Objective:Intimal hyperplasia is the main cause of restenosis of vein grafts after venous *** are considered to play a role in vein graft restenosis;however,the expression profi le of microRNAs in neointima has not been reported in *** wanted to investigate the differentially expressed microRNAs in the restenosis of vein grafts in ***:We established a rat model for vein transplantation to explore the pathogenic roles of microRNAs during intimal *** and eosin staining was used to confi rm intimal hyperplasia in the vein *** in microRNA expression in the vein grafts were detected 3 and 14 days after surgery by sequencing,reverse transcription–quantitative polymerase chain reaction,and bioinformatics analyses for functional ***:We detected 711 newly predicted microRNAs among all the *** these comparisons,437 differentially expressed microRNAs were detected in the postoperative day 3 group versus the control group,265 were detected in the postoperative day 14 group versus the control group,and 158 were detected in the postoperative day 14 group versus the postoperative day 3 *** analysis revealed signifi cant enrichment of target genes that mediate Wnt,mitogen-activated protein kinase,vascular smooth muscle contraction,and regulation of actin cytoskeleton ***:Our results provide insight into the pathogenesis of restenosis and will help develop novel targets in the prevention and treatment of vein graft restenosis.

关键词： vein graft intimal hyperplasia restenosis microRNA

Safety Distance Determination for 500 kV AC Transmission Line’s Helicopter Inspection

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Energy and Power Engineering 2013年第4期5卷 1153-1158页

作者： shuwei wan Xingming Bian Lan Chen Liming wang Zhicheng Guan Graduate School at Shenzhen Tsinghua University Beijing China

As an efficient and advanced line inspection method, helicopter line patrol is gradually more and more used in transmission lines inspection, promoting the elaborate operation of transmission lines and reducing the management cost. However, as a 'floating-potential conductor' near to a high-voltage transmission line, the helicopter would be at a high electric field region;and bring security risk to equipment and operating personnel. In this paper, the electric field strength near the cabin at locations of different distance from transmission lines is investigated by calculation, and the field in the helicopter cabin is also calculated with finite element method (FEM). The result indicates that the potential difference becomes higher with the decrease of the distance between the helicopter and transmission line. Considering the discharge energy and the guarantee of the persons’ safety, the safety distance is determined as d≥15 m.

关键词： Transmission Lines Electric Field Helicopter Inspection Safety Distance Limit-value Transient Electric Shock

大鼠自体移植静脉差异表达microRNA及其生物信息学分析

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中国普通外科杂志 2019年第12期28卷 1490-1496页

作者：万树威李震曹辉郑州大学第一附属医院腔内血管外科

目的:通过分析大鼠自体移植静脉microRNA(miRNA)表达谱,探讨miRNA对移植静脉内膜增生的调控机制。方法:将SD大鼠自体颈外静脉移植到肾下腹主动脉制作静脉移植模型,分别术后3、14d取移植静脉,以正常SD大鼠颈外静脉为对照,提取总RNA后用... 详细信息

目的:通过分析大鼠自体移植静脉microRNA(miRNA)表达谱,探讨miRNA对移植静脉内膜增生的调控机制。方法:将SD大鼠自体颈外静脉移植到肾下腹主动脉制作静脉移植模型,分别术后3、14d取移植静脉,以正常SD大鼠颈外静脉为对照,提取总RNA后用高通量测序技术检测miRNA表达谱,筛选差异表达miRNA并预测其靶基因,进行靶基因的GO富集分析和KEGG富集分析。结果:与正常静脉比较,术后14d的移植静脉差异表达miRNA总数为265,其中表达上调的miRNA有183个,表达下调的miRNA有82个;术后14d与术后3d的移植静脉间比较,差异表达的miRNA总数158,其中表达上调的miRNA有94个,表达下调的miRNA有64个。miRNA靶基因GO功能分析显示,富集的基因主要参与了DNA转录过程的调节、细胞间信号转导的调控和蛋白质磷酸化过程的调节;KEGG通路分析显示,富集的信号通路主要有MAPK信号通路、cAMP信号通路、Wnt信号通路、紧密连接、cGMP-PKG信号通路。结论:miRNA通过复杂的调控网络参与移植静脉内膜增生的生物学过程。所发现的miRNA及其调控网络可能为移植静脉内膜增生的机制研究与干预提供参考。

关键词：血管移植术静脉血管内膜微RNAs 计算生物学

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交流老化导线温升特性改变对载流量的影响

高电压技术 2014年第5期40卷 1499-1506页

作者：陈澜卞星明万树伟王黎明关志成清华大学电机工程与应用电子技术系北京100084 清华大学深圳研究生院深圳518055

国内对于长期运行的导线老化对其载流量影响的研究鲜有报道,往往根据国外设计标准进行载流量校验,缺乏实际测量数据。针对上述情况,采用我国多条运行多年的交流老化后导线作为样本进行了通流温升实验测量到线路老化后实际载流量变化特性... 详细信息

国内对于长期运行的导线老化对其载流量影响的研究鲜有报道,往往根据国外设计标准进行载流量校验,缺乏实际测量数据。针对上述情况,采用我国多条运行多年的交流老化后导线作为样本进行了通流温升实验测量到线路老化后实际载流量变化特性;同时对样本单位长度电阻进行了测量。结果表明老化后导线温升快于新导线,且稳定后温度更高;老化后导线单位长度电阻虽未超过国标限值,但与同型号新导线实测值相比增加4%～14%。根据热平衡方程和实验结果对载流量进行了计算,并反推出导线表面辐射系数,表面辐射系数与参考值相比差异较大,据此估算将使载流量下降约6%。分析认为导线长期运行老化后表面状态改变,形成一定厚度的污质层最终影响了导线的散热效果和单位长度电阻变化。

关键词：载流量表面辐射系数老化导线输电线路架空线路单位长度电阻

巡线直升机对500kV交流输电线路电场影响的仿真

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高电压技术 2013年第1期39卷 201-209页

作者：王黎明于德明陈方东万树伟卞星明陈澜清华大学深圳研究生院深圳518055 清华大学电机工程与应用电子技术系北京100084 冀北电力有限公司冀北电力检修分公司北京102488

电磁安全距离的确定是当巡线直升机靠近导线时确保操作人员安全的有效保证。为此,通过有限元软件的数值仿真,首先对输电线路模型进行简化并应用镜像法对简化模型的有效性进行验证。模拟直升机悬浮于500kV超高压输电线路附近时,对直升机... 详细信息

电磁安全距离的确定是当巡线直升机靠近导线时确保操作人员安全的有效保证。为此,通过有限元软件的数值仿真,首先对输电线路模型进行简化并应用镜像法对简化模型的有效性进行验证。模拟直升机悬浮于500kV超高压输电线路附近时,对直升机处于输电线路不同位置及不同距离时机身附近电场的畸变情况进行计算。结果表明:无直升机时,输电线路周围空间电场强度与其到最近的导线的距离近似呈反比例关系;有直升机时,直升机上最大电场强度与直升机到最近导线的距离近似呈反比例关系,场强最大值点主要出现在机翼上,大小约为没有直升机时的6～10倍;当直升机在地线附近时,由于地线屏蔽作用使得直升机上电场强度较小,该电场不影响直升机日常巡线。通过直升机上最大场强与直升机到导线距离的关系,确定在不同电场强度限值下直升机巡线的安全距离,当限值为500kV/m时,安全距离约为2.2m。

关键词：直升机巡线 500kV线路超高压空间电场强度电场数值仿真悬浮电势