简介：Becausethelargermetallicsurroundsareheatedbytheeddycurrent,whichisgeneratedbytheACcurrentflowingthroughtheACbusbarintheInternationalThermonuclearExperimentalReactor(ITER)poloidalfield(PF)convertersystem,shieldingoftheACbusbarisrequiredtodecreasethetemperatureriseofthesurroundstosatisfythedesignrequirement.ThreespecialtypesofACbusbarwithnaturalcooling,aircoolingandwatercoolingbusbarstructurehavebeenproposedandinvestigatedinthispaper.Foreachcoolingscheme,a3Dfinitemodelbasedontheproposedstructurehasbeendevelopedtoperformtheelectromagneticandthermalanalysistopredicttheiroperationbehavior.Comparingtheanalysisresultsofthethreedifferentcoolingpatterns,watercoolinghasmoreadvantagesthantheotherpatternsanditisselectedtobethethermaldissipationpatternfortheACbusbarofITERPFconverterunit.TheapproachtoqualifythesuitablecoolingschemeinthispapercanbeprovidedasareferenceonthethermaldissipationdesignofACbusbarintheconvertersystem.

简介：摘要目的比较TPF、PF方案在局部晚期鼻咽癌同步放化疗中的近期疗效及毒副反应。方法将50例Ⅱb-Ⅳb期鼻咽癌患者随机分为2组，分别为TPF组（治疗组）、PF组（对照组），于治疗完成后12周评估近期疗效，并观察放化疗期间的毒副反应。结果治疗组CR率为92%、PR为8%,有效率为100%，对照组CR率为68%、PR为28%，有效率96%，两组之间近期疗效有统计学差别；治疗组毒副反应较对照组增加，但无统计学意义。结论TPF方案在局部晚期鼻咽癌同步放化疗中的近期疗效优于PF方案，毒副反应无统计学差异。