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| 1 | Two-Stage Transformerless Dual-Buck PV Grid-Connected Inverters with High Efficiency显示文摘A semi-two-stage common-ground-type transformerless dual-buck-based grid-connected inverter is proposed in this paper.The common-ground-type topology can eliminate common mode(CM)leakage current by connecting the negative terminal of the photovoltaic(PV)directly to the neutral point of the grid,which bypasses the PV array’s stray capacitance.The dual-buck-based topology guarantees increased robustness since the dc-link cannot be short-circuited by a shoot-through event.The semi-two-stage topology features multi-level characteristic,which has a lower forward-voltage drop and smaller dv/dt.Compared with the conventional two-stage inverter,the proposed topology achieves higher efficiency and higher reliability.Experimental results of a 1.5kW prototype show that the proposed inverter is able to achieve high efficiency and low leakage currents. | Li Zhang Fengkai Jiang Dewei(David)Xu Kai Sun Yongqiang Hao Tao Zhang | 2018 | Chinese Journal of Electrical Engineering2018，4，2： | 4 |
| 2 | Decomposition and decoupling analysis of carbon dioxide emissions in African countries during 1984–2014显示文摘The potential for mitigating climate change is growing worldwide,with an increasing emphasis on reducing CO_(2)emissions and minimising the impact on the environment.African continent is faced with the unique challenge of climate change whilst coping with extreme poverty,explosive population growth and economic difficulties.CO_(2)emission patterns in Africa are analysed in this study to understand primary CO_(2)sources and underlying driving forces further.Data are examined using gravity model,logarithmic mean divisia index and Tapio's decoupling indicator of CO_(2)emissions from economic development in 20 selected African countries during 1984-2014.Results reveal that CO_(2)emissions increased by 2.11%(453.73 million ton)over the research period.Gravity centre for African CO_(2)emissions had shifted towards the northeast direction.Population and economic growth were primary driving forces of CO_(2)emissions.Industrial structure and emission efficiency effects partially offset the growth of CO_(2)emissions.The economic growth effect was an offset factor in central African countries and Zimbabwe due to political instability and economic mismanagement.Industrial structure and emission efficiency were insufficient to decouple economic development from CO_(2)emissions and relieve the pressure of population explosion on CO_(2)emissions in Africa.Thus,future efforts in reducing CO_(2)emissions should focus on scaleup energy-efficient technologies,renewable energy update,emission pricing and long-term green development towards sustainable development goals by 2030. | Claudien Habimana Simbi Jianyi Lin Dewei Yang Jean Claude Ndayishimiye Yang Liu Huimei Li Lingxing Xu Weijing Ma | 2021 | Journal of Environmental Sciences2021，33，4： | 3 |
| 3 | Evaluation of spatial and temporal patterns of insect damage and aflatoxin level in the pre-harvest corn fields to improve management tactics显示文摘在与有一致基因背景的植物的一个玉米领域里的黄麴毒素污染的关系的昆虫损坏的空间、时间的模式很好没被理解。在昆虫损坏和黄麴毒素在的空间模式的以前的考试以后预先收获玉米地,我们进一步与二采样检验了喂圆块、喂核的昆虫损坏,和黄麴毒素水平的空间、时间的模式在在 2008 和 2009 预先收获。由每 ear/kernel-feeding 昆虫的喂的损坏(即,丝绸 / 圆块上的玉米一种有害幼虫 / 秋天粟蚕损坏,和玉米核由的褪色坏透臭虫) 并且玉米象鼻虫人口用五只耳朵在每个格子点被估计。采样数据在两年里处于昆虫损坏和黄麴毒素污染显示出域边效果。玉米象鼻虫比任何一个玉米一种有害幼虫更经常向聚集的分布趋于或坏透两年里的臭虫损坏。为黄麴毒素水平检测聚集的分发的频率是昆虫损坏评价的不到任何东西。坏透臭虫损坏和玉米象鼻虫数字更仔细比是玉米一种有害幼虫的与黄麴毒素水平被联系损坏。另外,空间时间的协会(χ
) 的索引证明玉米象鼻虫的数字被联系在之间第一(4 个星期预先收获) 并且秒(1 个星期预先收获) 所有地上的两年里的采样。相反,在来自 Belflower 农场上的地的第一和第二采样之间的玉米一种有害幼虫损坏,和黄麴毒素水平和玉米一种有害幼虫在 Lang 农场上从这块地损坏在 2009 被分裂。 | Xinzhi Ni Jeffrey P. Wilson Michael D. Toews G. David Buntin R. Dewey Lee Xin Li Zhongren Lei Kanglai He Wenwei Xu Xianchun Li Alisa Huffaker Eric A. Schmelz | 2014 | Insect Science2014，21，5： | 2 |
| 4 | Arabidopsis ENOR3 regulates RNAi-mediated antiviral defense显示文摘Viruses can infect host plants to cause severe diseases and substantial agricultural loss, while plants have evolved RNA interference(RNAi) strategy to defend against viral infection. Despite enormous efforts, only a few host proteins in RNAi pathway were shown to mediate antiviral defense, including RNA-dependent RNA polymerase 1(RDR1), RDR6, DICER-LIKE 2(DCL2) and DCL4. In this study, we carried out a genetic screen for antiviral factors of RNAi pathway in Arabidopsis rdr6 background via inoculation with a 2 bdeficient Cucumber Mosaic Virus(CMV-D2b). We identified a mutant susceptible to CMV-D2b, referred to as enhancer of rdr6(enor) 3-1 rdr6, and found that ENOR3 encodes a functionally unknown protein with high homology to the mammalian Non Imprinted in Prader-Willi/Angelman(NIPA) magnesium transporters. ENOR3 inhibits accumulation of CMV-D2b and acts additively with RDR1, RDR6, DCL2 and DCL4 in antiviral defense. These results uncover that ENOR3 is a key component in antiviral RNAi pathway, and provide new insights into antiviral immunity. | Hua Gao Mai Yang Haitao Yang Yue Qin Biyun Zhu Gang Xu Chengyuan Xie Dewei Wu Xiaolin Zhang Wanxiang Li Jianbin Yan Susheng Song Tiancong Qi Shou-Wei Ding Daoxin Xie | 2018 | Journal of Genetics and Genomics2018，45，1： | 2 |
| 5 | Indirect space vector based modulation techniques for high-power multi- modular matrix converters显示文摘 | Wang Jiangcheng Wu Bin Xu Dewei | 2013 | Industrial Electronics Maga- zine IEEE2013，60，8： | 1 |
| 6 | Power loss and junction temperature analysis of power semiconductor devices显示文摘 | Xu Dewei Lu Haiwei Huang Lipei | 2002 | IEEE Transations on Industry Applications2002，38，5： | 1 |
| 7 | A novel AC-DC converter for PMSG variable speed wind energy conversion systems 显示文摘 | XU Dewei LUO Zhenhan | 2009 | IEEE2009，，2： | 1 |
| 8 | A novel hardware-based all-digital phase-locked loop applied to grid-connected power converters显示文摘 | Geng Hua Xu Dewei Wu Bin | 2011 | IEEE Transactions on Industrial Electronics2011，58，5： | 1 |
| 9 | Unified power control for PMSG-based WECS operating under different grid conditions 显示文摘 | Hua Geng Geng Yang Dewei Xu | 2011 | IEEE Transactions on Energy Conversion2011，26，3： | 1 |
| 10 | A Novel Control Scheme for Current Source Converter Based PMSG Wind Energy Conversion Systems 显示文摘 | Jingya Dai Dewei Xu Bin Wu | 2009 | IEEE Transactions on Power Electronics2009，24，4： | 1 |
| 11 | Modeling and Control of Brushless Doubly-Fed Induction Generators in Wind Energy Applications 显示文摘 | Protsenko K Xu Dewei | 2008 | IEEE Transactions on Power Electronics2008，23，3： | 1 |
| 12 | Power loss and junction temperature analysis of power semiconductor devices显示文摘 | Xu Dewei Lu Haiwei Huang Lipei | 2002 | IEEE Transactions on Industry Applications2002，38，5： | 1 |
| 13 | Iliac graft vasculari- zation for femoral head osteonecrosis 显示文摘 | Dewei Zhao Dachuan Xu Weiming Wang | 2006 | Clin Orthop Relat Res2006，442，： | 1 |
| 14 | A Novel Control System for Current Source Converter Based Variable Speed PM Wind Power Generators显示文摘 | Jingya Dai Dewei Xu Bin Wu | 2007 | IEEE2007，，： | 1 |
| 15 | Active islanding detection for inverter-based distributed generation systems with power control interface 显示文摘 | Geng Hua Xu Dewei Wu Bin | 2011 | IEEE Transactions on Energy Conversion2011，26，4： | 1 |
| 16 | United power control for PMSG-hased WECS operating under different grid conditions显示文摘 | GENG Hua YANG Geng XU Dewei | 2011 | IEEE Trans on Energy Conversion2011，26，3： | 1 |
| 17 | Active damping for PMSG-based WECS with DC-link current estimation显示文摘 | GENG Hua XU Dewei WU Bin | | 0，，04： | 1 |
| 18 | Stability analysis and improve- ments for variable-speed muhipole permanent magnet synchronous generator-based wind energy conversion sys- tem显示文摘 | GENG Hua XU Dewei | 2011 | IEEE Transactions on Sustainable Energy2011，2，4： | 1 |
| 19 | Hybrid PWM for High Power Current-Source Inverter Fed Drives With Low Switching Frequency显示文摘 | Zheng Wang BinWu Dewei Xu | 2011 | IEEE Transactions on Power Electronics2011，26，6： | 1 |
| 20 | Mesoscale scanning probes tips with subnanometer rms roughness 显示文摘 | XU Dewei LIECHTI Kenneth M RAVI-Chandar K | 2007 | Review of Scientific Instruments2007，78，07： | 1 |
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