简介:【摘要】本文着重介绍了石油钻杆接头复合模锻工艺,通过我公司生产具体实例,对石油钻杆接头复合模锻生产中钢锭加热、毛坯制定、加工设备选择、模具设计、锻后缓冷等工艺过程进行了探讨,可为石油钻杆接头生产提供借鉴。
简介:摘要:钛合金较其他金属结构材料相比,具有三个显著的优点:比强度高、中温性能好和耐腐蚀。在室温下,钛合金的比拉伸强度为高强钢的1.26倍,为高强铝合金的1.38倍。在400~550℃的温度范围内,钛合金的比持久强度,比蠕变强度和比疲劳强度,都明显地优于耐热不锈钢。
简介:AStudyonHandoverandChannelAllocationSchemewithCostFunctioninLowEarth-OrbitalSatelliteSystems,Astudyontheshort-circuitcapabilityoffield-stopIGBTs,ATutorialonOpticalNetworks,ATwo-Cell-LookaheadCallAdmissionandHandoffManagementSchemeforMultimediaLEOSatelliteNetworks,AbstractSpecificationinObject-ZandCSP,ACCEPTANCEOFINTERNETCONTENTFILTERS:ANEMPIRICALSTUDY,AccurateandEfficientPredictionofCoverageMapinanOfficeEnvironmentUsingFrustumRayTracingandIn-SituPenetrationLossMeasurement.
简介:AnewmethodofblockingfaultdiagnosisonstatorwindingbasedonANN;AnewSi:CepitaxialchannelnMOSFETarchitecturewithimproveddrivabilityandshort-channelcharacteristics;AnewvalidatedphysicallybasedIGCTmodelforcircuitsimulationofsnubberlessandseriesoperation;ANovel100MHz-40GHzRFTerminationwithBiasNetworkforOpticalSystems;Anovelchannelallocationschemeinintegratedwirelessandmobilenetworks
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