简介:SUV的全称是SportUtilityVehicle,即运动型多用途汽车,单从名字看,与很多人印象中的越野车或者说吉普车似乎并不是一回事.这里就要引入一下所谓“城市SUV”的概念,传统意义上的越野车的确可以翻山越岭,带你去很多地方,有着坚实的大梁、强悍的四驱系统,这样的车型现在往往被称为“硬派SUV”.
简介:Ablationdynamicsoftungstenirradiatedwitha70fslaserpulseisinvestigatedwithX-rayinterferometryandX-rayimagingusinga13.9nmsoftX-raylaserof7pspulseduration.Theevolutionofhigh-densityablationfrontoftungsten(i.e.,W)ispresented.Theablationfrontexpandsto~120nmabovetheoriginaltargetsurfaceat160psafterfemtosecond-laserirradiationwithanexpansionspeedofapproximately750m∕s.TheseresultswillprovideimportantdataforunderstandingablationpropertiesofW,whichisacandidatematerialofthefirstwallofmagneticconfinementfusionreactors.