0.30ecs
ecs 时间:2021-03-02 阅读:()
1ECSECSWeldGeometryStandardsWeldGeometryStandardswww.
esveld.
comwww.
esveld.
comwww.
rail.
tudelft.
nlwww.
rail.
tudelft.
nlFORCE-BASEDASSESSMENTOFWELDGEOMETRYFORCE-BASEDASSESSMENTOFWELDGEOMETRYCoenraadEsveldCoenraadEsveldDelftUniversityofTechnologyEsveldConsultingServicesDelftUniversityofTechnologyEsveldConsultingServices2ECSECSWeldGeometryStandardsWeldGeometryStandardswww.
esveld.
comwww.
esveld.
comwww.
rail.
tudelft.
nlwww.
rail.
tudelft.
nlDAMAGEDUETOPOORWELDGEOMETRYDAMAGEDUETOPOORWELDGEOMETRY3ECSECSWeldGeometryStandardsWeldGeometryStandardswww.
esveld.
comwww.
esveld.
comwww.
rail.
tudelft.
nlwww.
rail.
tudelft.
nlEXISTINGWELDGEOMETRYSTANDARDSEXISTINGWELDGEOMETRYSTANDARDSForexampleVersine:0ECSECSWeldGeometryStandardsWeldGeometryStandardswww.
esveld.
comwww.
esveld.
comwww.
rail.
tudelft.
nlwww.
rail.
tudelft.
nlThedynamiccontactforceasafunctionofthefirsttimederivative:Thedynamiccontactforceasafunctionofthefirsttimederivative:VELOCITYAPPROACHVELOCITYAPPROACHzvu(t)=z(t)MK2dyndzFCv*dx=2dyndzFCv*dx=5ECSECSWeldGeometryStandardsWeldGeometryStandardswww.
esveld.
comwww.
esveld.
comwww.
rail.
tudelft.
nlwww.
rail.
tudelft.
nlzQI≤1:AcceptedzQI>1:RejectedzQI≤1:AcceptedzQI>1:RejectedQUALITYINDICES(QI)QUALITYINDICES(QI)maxmaxnormnormdzFdxQI1OKdzFdx==≤maxmaxnormnormdzFdxQI1OKdzFdx==≤6ECSECSWeldGeometryStandardsWeldGeometryStandardswww.
esveld.
comwww.
esveld.
comwww.
rail.
tudelft.
nlwww.
rail.
tudelft.
nlFORCE-BASEDSTANDARDSFORCE-BASEDSTANDARDS1.
4mrad50kN100km/h0.
7mrad140kN300km/hInclinationFDynVelocity0.
9mrad65kN200km/h1.
8mrad35kN140km/h2.
4mrad15kN80km/h3.
2mrad5kN40km/hQI=1QI=1ConventionalConventionalHSLHSLHHHHImplementedinRAILPROFImplementedinRAILPROFTotalforceinprinciple225kNTotalforceinprinciple225kN7ECSECSWeldGeometryStandardsWeldGeometryStandardswww.
esveld.
comwww.
esveld.
comwww.
rail.
tudelft.
nlwww.
rail.
tudelft.
nlNEWVERSUSOLDNORMNEWVERSUSOLDNORM1.
00.
30OldNorm0.
70.
21300km/hInclination[mrad]Versine[mm]Velocity0.
90.
27200km/h1.
80.
54140km/h2.
40.
7280km/h3.
20.
9640km/h0dz2zdx20.
31.
0mrad2πλπ==≈0dz2zdx20.
31.
0mrad2πλπ==≈02xzzsinπλ=02xzzsinπλ=2mλ=2mλ=02z02z0z0.
3mm=0z0.
3mm=For80km/hthenewnormis2.
4timesmorefavorablethantheoldnorm,providedshortwaveshavebeengroundoff.
For80km/hthenewnormis2.
4timesmorefavorablethantheoldnorm,providedshortwaveshavebeengroundoff.
8ECSECSWeldGeometryStandardsWeldGeometryStandardswww.
esveld.
comwww.
esveld.
comwww.
rail.
tudelft.
nlwww.
rail.
tudelft.
nlLATERALGEOMETRYSTANDARDSLATERALGEOMETRYSTANDARDS0.
5mm300km/hVersineVelocity0.
5mm200km/h0.
5mm140km/h0.
7mm80km/h1.
0mm40km/hQI=1QI=1ImplementedinRAILPROFImplementedinRAILPROF9ECSECSWeldGeometryStandardsWeldGeometryStandardswww.
esveld.
comwww.
esveld.
comwww.
rail.
tudelft.
nlwww.
rail.
tudelft.
nlASSESSMENTOLDANDNEWONPRORAILASSESSMENTOLDANDNEWONPRORAILRP002432RP002432RP002945RP002945RP002949RP002949RP003125RP003125Oldnorm:Rejected,New:OKOldnorm:Rejected,New:OKOldnorm:OK,New:RejectedOldnorm:Rejected,New:Rejected10ECSECSWeldGeometryStandardsWeldGeometryStandardswww.
esveld.
comwww.
esveld.
comwww.
rail.
tudelft.
nlwww.
rail.
tudelft.
nlSELECTIONONPRORAILSELECTIONONPRORAIL00.
20.
40.
60.
81CumulativeFrequencyCDFMoerdijk-Dordrecht(VSRT)Delft-DenHaagLageZwaluwe-HollandsDiep0123456789WeldQualityIndex[-](140km/h)81%60%31%1.
8mrad(140km/h)1.
8mrad(140km/h)Limitat80km/hLimitat80km/h100weldspergroup100weldspergroup11ECSECSWeldGeometryStandardsWeldGeometryStandardswww.
esveld.
comwww.
esveld.
comwww.
rail.
tudelft.
nlwww.
rail.
tudelft.
nlOLDVERSUSNEWSTANDARDSOLDVERSUSNEWSTANDARDS00.
20.
40.
60.
81CumulativeFrequency012345678910111213MaximumAbsoluteInclinationofWeldGeometry(25mmbase)[mrad].
46%NewStandards3001408040km/hOldNorm(0–0.
3mm)isindependentoflinespeed16%passedOldNorm(0–0.
3mm)isindependentoflinespeed16%passed3%58%73%Population239welds00.
20.
40.
60.
81CumulativeFrequency012345678910111213MaximumAbsoluteInclinationofWeldGeometry(25mmbase)[mrad].
46%NewStandards3001408040km/hOldNorm(0–0.
3mm)isindependentoflinespeed16%passedOldNorm(0–0.
3mm)isindependentoflinespeed16%passed3%58%73%Population239weldsQInormat140km/his3timesmorefavorablethanoldnorm00.
20.
40.
60.
81CumulativeFrequency012345678910111213MaximumAbsoluteInclinationofWeldGeometry(25mmbase)[mrad].
46%NewStandards3001408040km/hOldNorm(0–0.
3mm)isindependentoflinespeed16%passedOldNorm(0–0.
3mm)isindependentoflinespeed16%passed3%58%73%Population239welds00.
20.
40.
60.
81CumulativeFrequency012345678910111213MaximumAbsoluteInclinationofWeldGeometry(25mmbase)[mrad].
46%NewStandards3001408040km/hOldNorm(0–0.
3mm)isindependentoflinespeed16%passedOldNorm(0–0.
3mm)isindependentoflinespeed16%passed3%58%73%Population239weldsQInormat140km/his3timesmorefavorablethanoldnorm12ECSECSWeldGeometryStandardsWeldGeometryStandardswww.
esveld.
comwww.
esveld.
comwww.
rail.
tudelft.
nlwww.
rail.
tudelft.
nly=18,62x+20,93R2=0,0905010000,250,50,7511,25versine[mm]max.
dyn.
contactforce[kN]y=4,33xR2=0,9105010005101520max.
discretisedgradient(5mmbasis)[mrad]max.
dyn.
contactforce[kN]LowcorrelationforceandversineLowcorrelationforceandversineHighcorrelationforceandQIHighcorrelationforceandQICALCULATEDDYNAMICFORCESCALCULATEDDYNAMICFORCES13ECSECSWeldGeometryStandardsWeldGeometryStandardswww.
esveld.
comwww.
esveld.
comwww.
rail.
tudelft.
nlwww.
rail.
tudelft.
nlDynamicforcelinearwithQIDynamicforcelinearwithQIDynamicforcelinearwithtrainspeedDynamicforcelinearwithtrainspeed0204060801001201401600246810max.
weldslope[mrad]Fdyn[kN]v=300km/hv=140km/hv=80km/hv=40km/hy=0,28xR2=0,98020406080100050100150200250300trainspeed[km/h]Fdyn[kN]slope:5mradCALCULATEDDYNAMICFORCESCALCULATEDDYNAMICFORCES14ECSECSWeldGeometryStandardsWeldGeometryStandardswww.
esveld.
comwww.
esveld.
comwww.
rail.
tudelft.
nlwww.
rail.
tudelft.
nlAXLEBOXACCELERATIONSAXLEBOXACCELERATIONSDynamicamplificationlessthan2.
2Dynamicamplificationlessthan2.
2y=0,23x+1,11R2=0,5911,21,41,61,822,200,511,522,53QI(140km/h)DAF(750Hz)15ECSECSWeldGeometryStandardsWeldGeometryStandardswww.
esveld.
comwww.
esveld.
comwww.
rail.
tudelft.
nlwww.
rail.
tudelft.
nlProcedure:zSampleweldgeometrywithdigitalstraightedgezFiltermeasuredsignalzDetermine1stderivative(inclination)zNormalizewithinterventionvalueforlinespeedzCalculateQI.
zQIECSECSWeldGeometryStandardsWeldGeometryStandardswww.
esveld.
comwww.
esveld.
comwww.
rail.
tudelft.
nlwww.
rail.
tudelft.
nlPRACTICALIMPLEMENTATIONPRACTICALIMPLEMENTATION17ECSECSWeldGeometryStandardsWeldGeometryStandardswww.
esveld.
comwww.
esveld.
comwww.
rail.
tudelft.
nlwww.
rail.
tudelft.
nlPDASCREENPDASCREENV=140km/hQI=1.
06V=140km/hQI=1.
06QIuniquelyshowswheretogrindQIuniquelyshowswheretogrind18ECSECSWeldGeometryStandardsWeldGeometryStandardswww.
esveld.
comwww.
esveld.
comwww.
rail.
tudelft.
nlwww.
rail.
tudelft.
nlDESKTOPSOFTWAREDESKTOPSOFTWAREAlldataandgraphscanbeshownonaPC;Resultsinpdf-formatcandirectlybeemailedtocustomer.
AlldataandgraphscanbeshownonaPC;Resultsinpdf-formatcandirectlybeemailedtocustomer.
19ECSECSWeldGeometryStandardsWeldGeometryStandardswww.
esveld.
comwww.
esveld.
comwww.
rail.
tudelft.
nlwww.
rail.
tudelft.
nlCONCLUSIONSCONCLUSIONS1.
Theorybasedonfirstderivativeworksfineinpractice;2.
Steelstraightedgeisabsolutelyinadequate;3.
InsteadelectronicstraightedgeswithQI(RAILPROF);4.
HighcorrelationofforceandQI,lowcorrelationwithversine;5.
WithRAILPROFQImeasurement:Youseewhatyoudo;Higherquality;Lessrejectionsprovidedshortwavesaregroundproperly(alsonegativeweldsallowed);Extensionoflifecycle.
1.
Theorybasedonfirstderivativeworksfineinpractice;2.
Steelstraightedgeisabsolutelyinadequate;3.
InsteadelectronicstraightedgeswithQI(RAILPROF);4.
HighcorrelationofforceandQI,lowcorrelationwithversine;5.
WithRAILPROFQImeasurement:Youseewhatyoudo;Higherquality;Lessrejectionsprovidedshortwavesaregroundproperly(alsonegativeweldsallowed);Extensionoflifecycle.
esveld.
comwww.
esveld.
comwww.
rail.
tudelft.
nlwww.
rail.
tudelft.
nlFORCE-BASEDASSESSMENTOFWELDGEOMETRYFORCE-BASEDASSESSMENTOFWELDGEOMETRYCoenraadEsveldCoenraadEsveldDelftUniversityofTechnologyEsveldConsultingServicesDelftUniversityofTechnologyEsveldConsultingServices2ECSECSWeldGeometryStandardsWeldGeometryStandardswww.
esveld.
comwww.
esveld.
comwww.
rail.
tudelft.
nlwww.
rail.
tudelft.
nlDAMAGEDUETOPOORWELDGEOMETRYDAMAGEDUETOPOORWELDGEOMETRY3ECSECSWeldGeometryStandardsWeldGeometryStandardswww.
esveld.
comwww.
esveld.
comwww.
rail.
tudelft.
nlwww.
rail.
tudelft.
nlEXISTINGWELDGEOMETRYSTANDARDSEXISTINGWELDGEOMETRYSTANDARDSForexampleVersine:0ECSECSWeldGeometryStandardsWeldGeometryStandardswww.
esveld.
comwww.
esveld.
comwww.
rail.
tudelft.
nlwww.
rail.
tudelft.
nlThedynamiccontactforceasafunctionofthefirsttimederivative:Thedynamiccontactforceasafunctionofthefirsttimederivative:VELOCITYAPPROACHVELOCITYAPPROACHzvu(t)=z(t)MK2dyndzFCv*dx=2dyndzFCv*dx=5ECSECSWeldGeometryStandardsWeldGeometryStandardswww.
esveld.
comwww.
esveld.
comwww.
rail.
tudelft.
nlwww.
rail.
tudelft.
nlzQI≤1:AcceptedzQI>1:RejectedzQI≤1:AcceptedzQI>1:RejectedQUALITYINDICES(QI)QUALITYINDICES(QI)maxmaxnormnormdzFdxQI1OKdzFdx==≤maxmaxnormnormdzFdxQI1OKdzFdx==≤6ECSECSWeldGeometryStandardsWeldGeometryStandardswww.
esveld.
comwww.
esveld.
comwww.
rail.
tudelft.
nlwww.
rail.
tudelft.
nlFORCE-BASEDSTANDARDSFORCE-BASEDSTANDARDS1.
4mrad50kN100km/h0.
7mrad140kN300km/hInclinationFDynVelocity0.
9mrad65kN200km/h1.
8mrad35kN140km/h2.
4mrad15kN80km/h3.
2mrad5kN40km/hQI=1QI=1ConventionalConventionalHSLHSLHHHHImplementedinRAILPROFImplementedinRAILPROFTotalforceinprinciple225kNTotalforceinprinciple225kN7ECSECSWeldGeometryStandardsWeldGeometryStandardswww.
esveld.
comwww.
esveld.
comwww.
rail.
tudelft.
nlwww.
rail.
tudelft.
nlNEWVERSUSOLDNORMNEWVERSUSOLDNORM1.
00.
30OldNorm0.
70.
21300km/hInclination[mrad]Versine[mm]Velocity0.
90.
27200km/h1.
80.
54140km/h2.
40.
7280km/h3.
20.
9640km/h0dz2zdx20.
31.
0mrad2πλπ==≈0dz2zdx20.
31.
0mrad2πλπ==≈02xzzsinπλ=02xzzsinπλ=2mλ=2mλ=02z02z0z0.
3mm=0z0.
3mm=For80km/hthenewnormis2.
4timesmorefavorablethantheoldnorm,providedshortwaveshavebeengroundoff.
For80km/hthenewnormis2.
4timesmorefavorablethantheoldnorm,providedshortwaveshavebeengroundoff.
8ECSECSWeldGeometryStandardsWeldGeometryStandardswww.
esveld.
comwww.
esveld.
comwww.
rail.
tudelft.
nlwww.
rail.
tudelft.
nlLATERALGEOMETRYSTANDARDSLATERALGEOMETRYSTANDARDS0.
5mm300km/hVersineVelocity0.
5mm200km/h0.
5mm140km/h0.
7mm80km/h1.
0mm40km/hQI=1QI=1ImplementedinRAILPROFImplementedinRAILPROF9ECSECSWeldGeometryStandardsWeldGeometryStandardswww.
esveld.
comwww.
esveld.
comwww.
rail.
tudelft.
nlwww.
rail.
tudelft.
nlASSESSMENTOLDANDNEWONPRORAILASSESSMENTOLDANDNEWONPRORAILRP002432RP002432RP002945RP002945RP002949RP002949RP003125RP003125Oldnorm:Rejected,New:OKOldnorm:Rejected,New:OKOldnorm:OK,New:RejectedOldnorm:Rejected,New:Rejected10ECSECSWeldGeometryStandardsWeldGeometryStandardswww.
esveld.
comwww.
esveld.
comwww.
rail.
tudelft.
nlwww.
rail.
tudelft.
nlSELECTIONONPRORAILSELECTIONONPRORAIL00.
20.
40.
60.
81CumulativeFrequencyCDFMoerdijk-Dordrecht(VSRT)Delft-DenHaagLageZwaluwe-HollandsDiep0123456789WeldQualityIndex[-](140km/h)81%60%31%1.
8mrad(140km/h)1.
8mrad(140km/h)Limitat80km/hLimitat80km/h100weldspergroup100weldspergroup11ECSECSWeldGeometryStandardsWeldGeometryStandardswww.
esveld.
comwww.
esveld.
comwww.
rail.
tudelft.
nlwww.
rail.
tudelft.
nlOLDVERSUSNEWSTANDARDSOLDVERSUSNEWSTANDARDS00.
20.
40.
60.
81CumulativeFrequency012345678910111213MaximumAbsoluteInclinationofWeldGeometry(25mmbase)[mrad].
46%NewStandards3001408040km/hOldNorm(0–0.
3mm)isindependentoflinespeed16%passedOldNorm(0–0.
3mm)isindependentoflinespeed16%passed3%58%73%Population239welds00.
20.
40.
60.
81CumulativeFrequency012345678910111213MaximumAbsoluteInclinationofWeldGeometry(25mmbase)[mrad].
46%NewStandards3001408040km/hOldNorm(0–0.
3mm)isindependentoflinespeed16%passedOldNorm(0–0.
3mm)isindependentoflinespeed16%passed3%58%73%Population239weldsQInormat140km/his3timesmorefavorablethanoldnorm00.
20.
40.
60.
81CumulativeFrequency012345678910111213MaximumAbsoluteInclinationofWeldGeometry(25mmbase)[mrad].
46%NewStandards3001408040km/hOldNorm(0–0.
3mm)isindependentoflinespeed16%passedOldNorm(0–0.
3mm)isindependentoflinespeed16%passed3%58%73%Population239welds00.
20.
40.
60.
81CumulativeFrequency012345678910111213MaximumAbsoluteInclinationofWeldGeometry(25mmbase)[mrad].
46%NewStandards3001408040km/hOldNorm(0–0.
3mm)isindependentoflinespeed16%passedOldNorm(0–0.
3mm)isindependentoflinespeed16%passed3%58%73%Population239weldsQInormat140km/his3timesmorefavorablethanoldnorm12ECSECSWeldGeometryStandardsWeldGeometryStandardswww.
esveld.
comwww.
esveld.
comwww.
rail.
tudelft.
nlwww.
rail.
tudelft.
nly=18,62x+20,93R2=0,0905010000,250,50,7511,25versine[mm]max.
dyn.
contactforce[kN]y=4,33xR2=0,9105010005101520max.
discretisedgradient(5mmbasis)[mrad]max.
dyn.
contactforce[kN]LowcorrelationforceandversineLowcorrelationforceandversineHighcorrelationforceandQIHighcorrelationforceandQICALCULATEDDYNAMICFORCESCALCULATEDDYNAMICFORCES13ECSECSWeldGeometryStandardsWeldGeometryStandardswww.
esveld.
comwww.
esveld.
comwww.
rail.
tudelft.
nlwww.
rail.
tudelft.
nlDynamicforcelinearwithQIDynamicforcelinearwithQIDynamicforcelinearwithtrainspeedDynamicforcelinearwithtrainspeed0204060801001201401600246810max.
weldslope[mrad]Fdyn[kN]v=300km/hv=140km/hv=80km/hv=40km/hy=0,28xR2=0,98020406080100050100150200250300trainspeed[km/h]Fdyn[kN]slope:5mradCALCULATEDDYNAMICFORCESCALCULATEDDYNAMICFORCES14ECSECSWeldGeometryStandardsWeldGeometryStandardswww.
esveld.
comwww.
esveld.
comwww.
rail.
tudelft.
nlwww.
rail.
tudelft.
nlAXLEBOXACCELERATIONSAXLEBOXACCELERATIONSDynamicamplificationlessthan2.
2Dynamicamplificationlessthan2.
2y=0,23x+1,11R2=0,5911,21,41,61,822,200,511,522,53QI(140km/h)DAF(750Hz)15ECSECSWeldGeometryStandardsWeldGeometryStandardswww.
esveld.
comwww.
esveld.
comwww.
rail.
tudelft.
nlwww.
rail.
tudelft.
nlProcedure:zSampleweldgeometrywithdigitalstraightedgezFiltermeasuredsignalzDetermine1stderivative(inclination)zNormalizewithinterventionvalueforlinespeedzCalculateQI.
zQIECSECSWeldGeometryStandardsWeldGeometryStandardswww.
esveld.
comwww.
esveld.
comwww.
rail.
tudelft.
nlwww.
rail.
tudelft.
nlPRACTICALIMPLEMENTATIONPRACTICALIMPLEMENTATION17ECSECSWeldGeometryStandardsWeldGeometryStandardswww.
esveld.
comwww.
esveld.
comwww.
rail.
tudelft.
nlwww.
rail.
tudelft.
nlPDASCREENPDASCREENV=140km/hQI=1.
06V=140km/hQI=1.
06QIuniquelyshowswheretogrindQIuniquelyshowswheretogrind18ECSECSWeldGeometryStandardsWeldGeometryStandardswww.
esveld.
comwww.
esveld.
comwww.
rail.
tudelft.
nlwww.
rail.
tudelft.
nlDESKTOPSOFTWAREDESKTOPSOFTWAREAlldataandgraphscanbeshownonaPC;Resultsinpdf-formatcandirectlybeemailedtocustomer.
AlldataandgraphscanbeshownonaPC;Resultsinpdf-formatcandirectlybeemailedtocustomer.
19ECSECSWeldGeometryStandardsWeldGeometryStandardswww.
esveld.
comwww.
esveld.
comwww.
rail.
tudelft.
nlwww.
rail.
tudelft.
nlCONCLUSIONSCONCLUSIONS1.
Theorybasedonfirstderivativeworksfineinpractice;2.
Steelstraightedgeisabsolutelyinadequate;3.
InsteadelectronicstraightedgeswithQI(RAILPROF);4.
HighcorrelationofforceandQI,lowcorrelationwithversine;5.
WithRAILPROFQImeasurement:Youseewhatyoudo;Higherquality;Lessrejectionsprovidedshortwavesaregroundproperly(alsonegativeweldsallowed);Extensionoflifecycle.
1.
Theorybasedonfirstderivativeworksfineinpractice;2.
Steelstraightedgeisabsolutelyinadequate;3.
InsteadelectronicstraightedgeswithQI(RAILPROF);4.
HighcorrelationofforceandQI,lowcorrelationwithversine;5.
WithRAILPROFQImeasurement:Youseewhatyoudo;Higherquality;Lessrejectionsprovidedshortwavesaregroundproperly(alsonegativeweldsallowed);Extensionoflifecycle.
buyvm美国大硬盘VPS，1Gbps带宽不限流量
buyvm正式对外开卖第四个数据中心“迈阿密”的块存储服务，和前面拉斯维加斯、纽约、卢森堡一样，依旧是每256G硬盘仅需1.25美元/月，最大支持10T硬盘。配合buyvm自己的VPS，1Gbps带宽、不限流量，在vps上挂载块存储之后就可以用来做数据备份、文件下载、刷BT等一系列工作。官方网站：https://buyvm.net支持信用卡、PayPal、支付宝付款，支付宝付款用的是加元汇率，貌似...
博鳌云¥799/月,香港110Mbps(含10M CN2)大带宽独立服务器/E3/8G内存/240G/500G SSD或1T HDD
博鳌云是一家以海外互联网基础业务为主的高新技术企业，运营全球高品质数据中心业务。自2008年开始为用户提供服务，距今11年，在国人商家中来说非常老牌。致力于为中国用户提供域名注册（国外接口）、免费虚拟主机、香港虚拟主机、VPS云主机和香港、台湾、马来西亚等地服务器租用服务，各类网络应用解決方案等领域的专业网络数据服务。商家支持支付宝、微信、银行转账等付款方式。目前香港有一款特价独立服务器正在促销，...
快云科技：香港沙田CN2云服务器低至29元/月起;美国高防弹性云/洛杉矶CUVIP低至33.6元/月起
快云科技怎么样?快云科技是一家成立于2020年的新起国内主机商，资质齐全 持有IDC ICP ISP等正规商家。云服务器网(yuntue.com)小编之前已经介绍过很多快云科技的香港及美国云服务器了，这次再介绍一下新的优惠方案。目前，香港云沙田CN2云服务器低至29元/月起;美国超防弹性云/洛杉矶CUVIP低至33.6元/月起。快云科技的云主机架构采用KVM虚拟化技术，全盘SSD硬盘，RAID10...
ecs为你推荐
-
iphone5解锁iphone5密码忘了怎么解锁qq怎么发邮件怎样在QQ上发送邮件？vbscript教程vbs 学习方法以及 vbs 实例 有编程基础怎么点亮qq空间图标QQ空间图标怎么点亮?二层交换机什么是二层交换机网管工具网吧工具有什么？网站优化方案网站优化方法有哪些如何清理ie缓存怎么清除IE缓存网站地图制作如何制作、提交网站地图购买流量买流量怎么买