简介:为了庆祝Focal发展的重要里程碑,原厂推出了Chorus826W30周年限量纪念版本,Chorus826W延续既有Chorus的造型,但细节更为精进,可说是AMG版本的Chorus。铝镁合金内凹式TNV高音单元安装在铝合金框架上,高频延伸直上28kHz。
简介:At-hyperwheel(t≥3)oflengthl(orW(t)lforbrevity)isat-uniformhypergraph(V,E),whereE={e1,e2,...,el}andv1,v2,...,vlaredistinctverticesofV=∪eii=1lsuchthatfori=1,...,l,vi,vi+1∈eiandei∩ej=P,j∈/{i1,i,i+1},wheretheoperationonthesubscriptsismodulolandPisavertexofVwhichisdifferentfromvi,1≤i≤l.Inthispaper,theminimumcoveringproblemofMCλ(3,W(3)4,v)isinvestigated.DirectandrecursiveconstructionsonMCλ(3,W(3)4,v)arepresented.Thecoveringnumbercλ(3,W(3)4,v)isfinallydeterminedforanypositiveintegersv≥5andλ.
简介:Inthisstudy,tungsten(W)wascoatedonacopper(Cu)substratebyusingdouble-glowdischargetechniqueusingapureWpanelasthetargetandargon(Ar)asthedischargeandsputteringgas.ThecrystalstructureoftheWcoatingwasexaminedbyX-raydiffraction(XRD).Scanningelectronmicroscopy(SEM)wasperformedwithcross-sectionimagestoinvestigatethepenetrationdepthofWintotheCubody.Additionally,thepropertiesofwearabilityresistance,corrosionresistanceandmechanicalstrengthoftheWcoatedCumatrixwerealsomeasured.Itisconcludedthatindouble-glowplasma,WcoatedCucanbefacilelyprepared.ItisnoticedthatthetreatmenttemperatureheavilydominatesthepropertiesoftheW-Cucomposite.
简介:伴随着计算机和网络技术的普及、成熟,企业的培训形式也随着发生变革。以E-Learning为代表的信息化学习方式在企业培训中扮演着越来越重要的角色,本文从投资回报(ROI)的角度针对企业培训做出分析,通过对案例的数据分析得出,在企业大规模培训中基于E-Learning方式培训为企业带来可观回报。