简介:Wemeasurethecurrent–voltage(I–V)characteristicsforthesinglecrystalofTl0.4K0.41Fe1.71Se2withthesuperconductingtransitiontemperature(TC)around30.5K,undera10Tmagneticfieldappliedperpendicularandparalleltotheabplane.WefindthattheshapesoftheI–Visothermsareverydifferentfromthedescriptionbythevortex-glass(VG)model.CombiningtheoreticalcalculationsandanalysisoftheρH⊥ab–TandρHab–Tdata,wegiveanexplicitdiscussionoverthesuitabilityoftheVGmodelfortheA0.8Fe2Se2superconductors,andpointoutthepossibilityofthematerialactingasaconvenientplatformforre-examinationandfurtherstudyofthecomplexvortexbehaviorsinthelayeredsuperconductors.
简介:摘要随着电力调度的不断发展,对电网调度自动化系统的要求越来越高,对“四遥”数据的精准率要求也越来越高,因此电力调度自动化状态估计合格率的稳定已成为国家电网公司地区电网运行情况的主要考核指标。对于影响状态估计遥测合格率的根源、以及提高状态估计合格率的改进措施的研究变的刻不容缓。