简介:ThreesynchrotronradiationbeamlineshavebeenbuiltonDAΦNE,theFrascatielectron-positronaccelerator.ItisPossibletomonitorandcontrolalltheelementsonthebeamlinesusingamodularnetworkdistributedI/OsystembyNationalInstrunments(FieldPoint)withBridgeVIEW/LabVIEWprograms,Twoofthesebeamlineshaveradiationsafetyproblemssolvedbytwoindependentandredundantsystems,usingmechanicalswitches,andS7-200PLC'sbySiemens.Inthisarticleoursolutionwillbedescribedindetails.
简介:EFFECTOFHe-NeLASERONTHEASTHMATICSUBJECTSEFFECTOFHe-NeLASERONTHEASTHMATICSUBJECTSGuGuoxian;WuSuying;RenJlnyun;WangFuqiang(Depa...
简介:Lowercontentofcarboncanfurtherimprovethestressrupturelifeofp-modifiedDA718alloyuptomorethan270%.Meanwhile,theductilityofthealloydecreasedalittle.Moreboronatomsdissociateduetodecreasingcarboncontentandinteractwithphosphoruswhichbringsthelongerstressrupturelifeofthealloy.Lesscarbonmayinducemorephosphorussegregatinginthegrainboundaryandresultinbrittleness.