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| 1 | Voltage regulation in LV grids by coordinated volt-var control strategies显示文摘The increasing penetration level of photovoltaic(PV)power generation in low voltage(LV)networks results in voltage rise issues,particularly at the end of the feeders.In order to mitigate this problem,several strategies,such as grid reinforcement,transformer tap change,demand-side management,active power curtailment,and reactive power optimization methods,show their contribution to voltage support,yet still limited.This paper proposes a coordinated volt-var control architecture between the LV distribution transformer and solar inverters to optimize the PV power penetration level in a representative LV network in Bornholm Island using a multi-objective genetic algorithm.The approach is to increase the reactive power contribution of the inverters closest to the transformer during overvoltage conditions.Two standard reactive power control concepts,cosu(P)and Q(U),are simulated and compared in terms of network power losses and voltage level along the feeder.As a practical implementation,a reconfigurable hardware is used for developing a testing platform based on real-time measurements to regulate the reactive power level.The proposed testing platform has been developed within PVNET.dk project,which targets to study the approaches for large PV power integration into the network,without the need of reinforcement. | Miguel JUAMPEREZ Guangya YANG Søren Bækhøj KJÆR | 2014 | Journal of Modern Power Systems and Clean Energy2014，2，4： | 10 |
| 2 | Voltage rise mitigation for solar PV integration at LV grids Studies from PVNET.dk显示文摘Solar energy from photovoltaic(PV)is among the fastest developing renewable energy systems worldwide.Driven by governmental subsidies and technological development,Europe has seen a fast expansion of solar PV in the last few years.Among the installed PV plants,most of them are situated at the distribution systems and bring various operational challenges such as power quality and power flow management.The paper discusses the modelling requirements for PV system integration studies,as well as the possible techniques for voltage rise mitigation at low voltage(LV)grids for increasing PV penetration.Potential solutions are listed and preliminary results are presented. | Guangya YANG Francesco MARRA Miguel JUAMPEREZ Søren Bækhøj KJÆR Seyedmostafa HASHEMI JacobØSTERGAARD Hans Henrik IPSEN Kenn H.B.FREDERIKSEN | 2015 | Journal of Modern Power Systems and Clean Energy2015，3，3： | 5 |
| 3 | 灰鹤在天山木扎提河湿地越冬及行为观察显示文摘于2017年10月—2019年5月,采用直接计数法、瞬时扫描取样法、卫星跟踪和最小凸多边形法(MCP),对新疆阿克苏地区拜城县木扎提河流域灰鹤(Grus grus)的种群特征、活动范围、行为时间分配和行为节律进行调查和分析。结果表明,2019年越冬灰鹤种群数量超过4700只,较2016年增加1倍多,种群发展动态呈上升趋势。灰鹤主要以家庭群为主(63.90%),聚集群次之(28.62%),孤鹤最少(7.48%)。家庭群主要以2成鸟1幼鸟为主(占46.82%),聚集群以5~8只个体为主(占65.91%)。整个越冬期持续140~160 d,灰鹤越冬期活动距离为1058 km,活动区域相对固定,活动区域面积为125 km^2。日活动面积和活动距离随着气温的变化而变化,温度降低,日活动范围和活动距离降低;反之,则增加。因此,活动面积和活动距离呈凹形变化,即先增加(10—11月),再逐渐减少(12—1月),然后增加(2—3月)的变化趋势。取食和警戒是灰鹤的主要越冬行为。灰鹤的46.8%日间时间用于取食,17.8%的日间时间用于警戒,用于休息、走动、理羽和其他行为的日间时间分别占13.4%、11.4%、7.4%和3.2%。日取食高峰呈双凸型,出现在8:00—9:00和17:00—18:00,分别达到57.0%和58.5%。休息高峰出现在11:00—15:00,占24.6%,呈单峰型。研究区灰鹤种群面临着放牧、农耕、天敌、道路车辆、低温和人为驱赶等诸多威胁因素。 | 李军伟 马鸣 孟凡娟 E I Ilyashenko V Yu Ilyashenko O V Belyalov A E Gavrilov S Kh Zaripova N Batbayar 曹垒 | 2020 | 生态与农村环境学报2020，36，5： | 4 |
| 4 | 心脏病及非心脏病患者降低舒张压的效果:收缩压干预试验结果分析显示文摘收缩压和舒张压低于何种阈值时心血管事件增多仍然不明确。应用收缩压干预试验(systolic blood pressure intervention trial,SPRINT)的数据,研究者评估了1519例心血管病患者和7574位非心血管病者的收缩压和舒张压与心血管事件之间的关系。 | 刘青 叶鹏 Khan NA Rabkin SW Zhao Y McAlister FA Park JE Guan M Chan S Humphries KH | 2018 | 中华高血压杂志2018，26，6： | 3 |
| 5 | Flexible impedance and capacitive tensile load sensor based on CNT composite显示文摘In this paper, the fabrication and investigation of flexible impedance and capacitive tensile load sensors based on carbon nanotube(CNT) composite are reported. On thin rubber substrates, CNTs are deposited from suspension in water and pressed at elevated temperature. It is found that the fabricated load cells are highly sensitive to the applied mechanical force with good repeatability. The increase in impedance of the cells is observed to be 2.0 times while the decrease in the capacitance is found to be 2.1 times as applied force increases up to 0.3 N. The average impedance and capacitive sensitivity of the cell are equal to 3.4 N^(-1) and 1.8 N^(-1), respectively. Experimental results are compared with the simulated values,and they show that they are in reasonable agreement with each other. | Zubair Ahmad Kh S Karimov Farid Touati | 2016 | Chinese Physics B2016，25，2： | 3 |
| 6 | Randomized comparison of 3 types of micronutrient supplements for home fortification of complementary foods in Ghana: effects on growth and motor development显示文摘 | Adu - Afarwuah S Lartey A Brown KH | 2007 | Am J Clin Nutr2007，86，2： | 1 |
| 7 | FDG PET detetion of unknown primary tumor显示文摘 | Klutmann S Kroger S | 2000 | J Nucl Med2000，41，5： | 1 |
| 8 | Radioprotection of salivary glands by S-2-(3-arninopropylarnino)-ethylphosphorothioic(amifostion) obtained in a rabbit animal model显示文摘 | Bohuslavizki KH Klutmann S Jenicke L | 1999 | Int J Radiat Onco! Bio! Phys1999，45，1： | 1 |
| 9 | Thrombolysis in resuscitated patient swith pulmonary embolism显示文摘 | Scholz KH Hilmer T Schuster S | 1990 | Dtsch Med Wochenschr1990，115，： | 1 |
| 10 | Tensile fracture toughness of ceramic materials: effects of dynamic loading and elevated temperatures显示文摘 | Suresh S Nakamura T Yeshurun Y Yang KH Duffy J | 1990 | Journal of the American Ceramic Society1990，73，8： | 1 |
| 11 | Research guidelines for the Delphi sur- vey technique 显示文摘 | Hasson F Keency S Mc KH | 2002 | J Adv Nuts2002，32，： | 1 |
| 12 | Prevalence and extent of cal- cification over aorta, coronary and carotid arteries in patients with Rheumatoid arthritis显示文摘 | Wang S Yiu KH Mok MY | 2009 | J Intern Med2009，266，： | 1 |
| 13 | The chemistry of secondary products from Acan- thopanax Species and their pharmacological activities 显示文摘 | Shin KH Lee S | 2002 | Nat Prod Sci2002，8，4： | 1 |
| 14 | One-year prophylactic treatment of euthyroid Hashimoto' s thyroiditis patients with levothyroxine: is there a benefit显示文摘 | Padberg S Heller K Usadel KH | 2001 | Thyroid2001，11，： | 1 |
| 15 | Mixed dentition analysis for Asian-Americans显示文摘 | Lee-Chan S Jacobson BN Chwa KH | | 0，，03： | 1 |
| 16 | Podocytespecific loss of functional microRNAs leads to rapid glomerular and tubular injury显示文摘 | Ho J Ng KH Rosen S | | 0，，11： | 1 |
| 17 | Effects of levonorgestrel-releasing intrauterine system and T380A intrauterine copper device on dysmenorrhea and days of bleeding in women with and without adenomyosis显示文摘 | Kelekci S Kelekci KH Yilmaz B | | 0，，05： | 1 |
| 18 | Sustained efllcacy and ~emi~m with the Toll-like ~ 7 agonist C-S-9620 in the Woodchuck model of chronic hepatitis B 显示文摘 | Menne S Tmrt~ D B Liu KH | 2015 | J Hepatol2015，62，6： | 1 |
| 19 | Cell type specific upregulation of vascular endothelial growth factor in an MCA-occlusion model of cerebral infarct 显示文摘 | Plate KH Beck H Danner S | 1999 | J Neuropathol Exp Neurol1999，58，6： | 1 |
| 20 | In vivo protective effect of tumour necrosis factor alpha against experimental infection with herpes simplex virus type 1显示文摘 | Rossol-Voth R Rossol S Schutt KH | 1991 | J Gen Virol1991，，72： | 1 |
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