Using the National Center for Environment Prediction Climate Forecast System Reanalysis coupled dataset during 1979–2010,we selected four subseasonal indexes from the 16 East Asian Summer Monsoon(EASM)indexes to char...Using the National Center for Environment Prediction Climate Forecast System Reanalysis coupled dataset during 1979–2010,we selected four subseasonal indexes from the 16 East Asian Summer Monsoon(EASM)indexes to characterize the subseasonal variability of the entire EASM system.The strongest(1996)and weakest(1998)years of the subseasonal variation were revealed based on these subseasonal EASM indexes.Furthermore,three rainfall concentration areas were defined in East Asia,and these areas were dissected by the atmospheric midlatitude jet stream axis and the position of the Western North Pacific Subtropical High(WNPSH).Then,the subseasonal effects of the WNPSH,the South Asian High(SAH),the Mongolian Cyclone(MC),and the Boreal Summer Intraseasonal Oscillation(BSISO)on each rainfall concentration area were studied in the strongest and weakest subseasonal variation years of the EASM.During the summer of 1998,the WNPSH and the SAH were stable in the more southern region,which not only blocked the northward progression of the BSISO but also caused the MC to advance southward.Therefore,the summer of 1998 was the weakest subseasonal variability of the EASM,but with significant subseasonal precipitation episodes in the northern and central rainfall areas.However,in 1996,the BSISO repeatedly spread northward in the south rainfall area because of the weak intensities and northern positions of the WNPSH and the SAH,which caused significant subseasonal precipitation episodes.In addition,MC was blocked to the north of approximately 42°N with a weak subseasonal rainfall.展开更多
应用饱和铁芯故障限流器(saturated-core fault current limiter,SCFCL)是限制系统短路电流的最有效措施,为解决传统SCFCL直流励磁损耗大的难题,提出了一种新型永磁励磁型饱和铁芯故障限流器(permanent-magnet-biased saturated-core fa...应用饱和铁芯故障限流器(saturated-core fault current limiter,SCFCL)是限制系统短路电流的最有效措施,为解决传统SCFCL直流励磁损耗大的难题,提出了一种新型永磁励磁型饱和铁芯故障限流器(permanent-magnet-biased saturated-core fault current limiter,PSFCL)o本文利用等效磁路、等效电路对该新拓扑进行研究分析,并进行相关参数设计,通过搭建基于Maxwell-3D的有限元电磁仿真模型,证明所提新型拓扑可有效限制故障电流,并通过样机试验进一步验证所提结构的有效性与理论的正确性。展开更多
基金supported by the National Key Program for Developing Basic Science (Nos.2018YFC1505900 and 2016YFA0600303)the National Natural Science Foundation of China (Nos.42175060,41621005, 41675064, 4167 5067, and 41875086)+2 种基金the Jiangsu Province Science Foundation (No. BK20201259)support of the Jiangsu Provincial Innovation Center for Climate Change and Fundamental Research Funds for the Central Universityjointly supported by the Joint Open Project of KLME and CIC-FEMD (No. KL ME201902)。
文摘Using the National Center for Environment Prediction Climate Forecast System Reanalysis coupled dataset during 1979–2010,we selected four subseasonal indexes from the 16 East Asian Summer Monsoon(EASM)indexes to characterize the subseasonal variability of the entire EASM system.The strongest(1996)and weakest(1998)years of the subseasonal variation were revealed based on these subseasonal EASM indexes.Furthermore,three rainfall concentration areas were defined in East Asia,and these areas were dissected by the atmospheric midlatitude jet stream axis and the position of the Western North Pacific Subtropical High(WNPSH).Then,the subseasonal effects of the WNPSH,the South Asian High(SAH),the Mongolian Cyclone(MC),and the Boreal Summer Intraseasonal Oscillation(BSISO)on each rainfall concentration area were studied in the strongest and weakest subseasonal variation years of the EASM.During the summer of 1998,the WNPSH and the SAH were stable in the more southern region,which not only blocked the northward progression of the BSISO but also caused the MC to advance southward.Therefore,the summer of 1998 was the weakest subseasonal variability of the EASM,but with significant subseasonal precipitation episodes in the northern and central rainfall areas.However,in 1996,the BSISO repeatedly spread northward in the south rainfall area because of the weak intensities and northern positions of the WNPSH and the SAH,which caused significant subseasonal precipitation episodes.In addition,MC was blocked to the north of approximately 42°N with a weak subseasonal rainfall.
文摘应用饱和铁芯故障限流器(saturated-core fault current limiter,SCFCL)是限制系统短路电流的最有效措施,为解决传统SCFCL直流励磁损耗大的难题,提出了一种新型永磁励磁型饱和铁芯故障限流器(permanent-magnet-biased saturated-core fault current limiter,PSFCL)o本文利用等效磁路、等效电路对该新拓扑进行研究分析,并进行相关参数设计,通过搭建基于Maxwell-3D的有限元电磁仿真模型,证明所提新型拓扑可有效限制故障电流,并通过样机试验进一步验证所提结构的有效性与理论的正确性。