简介:摘要2017年3月份,济钢中厚板厂生产的Q345R钢板表面出现网状裂纹,严重影响产品质量。本文根据生产实践,就网状裂纹的形成原因及影响因素进行探讨,并提出了有效的改进措施。
简介:Wedevelopahybridoptofluidicmicrocavitybyplacingamicrospherewithadiameterrangingfrom1to4μminliquid-filledplano-planoFabry–Perot(FP)cavities,whichcanprovideanextremelyloweffectivemodevolumedownto0.3–5.1μm^3whilemaintainingahighQ-factorupto1×10^4–5×10^4andafinesseof~2000.Comparedtothepureplano-planoFPcavitiesthatareknowntosufferfromthelackofmodeconfinement,diffraction,andgeometricalwalk-offlossesaswellasbeinghighlysusceptibletomirrormisalignment,ourmicrosphere-integratedFP(MIFP)cavitiesshowstrongopticalconfinementinthelateraldirectionwithatightmoderadiusofonly0.4–0.9μmandhightolerancetomirrormisalignmentaslargeas2°.Withthemicrosphereservingasawaveguide,theMIFPisadvantageousoverafiber-sandwichedFPcavityduetotheopen-cavitydesignforanalytes/liquidstointeractstronglywiththeresonantmode,theeaseofassembly,andthepossibilitytoreplacethemicrosphere.Inthiswork,themaincharacteristicsoftheMIFP,includingQ-factor,finesse,effectivemoderadiusandvolume,andtheirdependenceonthesurroundingmedium’srefractiveindex,mirrorspacing,microspherepositioninsidetheFPcavity,andmirrormisalignment,aresystematicallyinvestigatedusingafinite-elementmethod.Then,byinsertingdye-dopedpolystyrenemicrospheresofvarioussizesintotheFPcavityfilledwithwater,weexperimentallyrealizesingle-modeMIFPoptofluidiclasersthathavealasingthresholdaslowasafewmicrojoulespersquaremillimeterandalasingspotradiusofonly~0.5μm.OurresultssuggestthattheMIFPcavitiesprovideapromisingtechnologyplatformfornovelphotonicdevicesandbiological/chemicaldetectionwithultra-smalldetectionvolumes.
简介:WeproposeanddemonstrateawidelytunablepassivelyQ-switchedHo^3+∕Pr^3+-codopedZrF4-BaF2-LaF3-AlF3-NaFfiberlaseroperatinginthe2.8μmmid-infrared(MIR)wavebandbasedonasingle-walledcarbonnanotube(SWCNT)saturableabsorber(SA).TheSWCNTshavediametersrangingfrom1.4to1.7nm.ThemodulationdepthandsaturationintensityoftheSWCNTSAmeasuredat2850nmare16.5%and1.66MW∕cm^2,respectively.StableQ-switchedpulseswiththeshortestpulsedurationof1.46μsandthemaximumpulseenergyof0.43μJareachievedatalaunchedpumppowerof445.6mW.ThecombineduseofabroadbandSWCNTSAandaplaneruledgratingensuresabroadcontinuouslytuningrangeof55.0nmfrom2837.6to2892.6nm.Theoutputpowers,emissionspectra,repetitionrates,andpulsedurationsatdifferenttuningwavelengthsarealsocharacterizedandanalyzed.OurresultsindicatethatSWCNTscanbeexcellentbroadbandSAsinthe3μmMIRregion.Totheauthor’sknowledge,thisisthefirstdemonstrationofawidelytunablecarbon-nanotubeenabledpassivelyQ-switchedfiberlaseroperatinginthe2.8μmMIRwaveband.
简介:摘要目的探讨抗C1q抗体辅助诊断LN的临床价值。方法选取SLE患者66例(包括30例LN和36例非LN),其他自身免疫病患者34例及健康体检者30例。比较各组抗C1q抗体,并与抗ds-DNA抗体、补体C3、C4进行相关性分析。结果抗C1q抗体阳性率SLE组高于疾病对照组和健康对照组(31.8%;8.8%;3.3%。P<0.017)。LN组高于非LN组(46.7%与19.4%。P<0.05)。抗C1q抗体诊断LN的敏感度与抗dsDNA抗体相同(46.7%),但其特异度高于抗dsDNA抗体(80.6%与55.6%),两种抗体联合检测诊断LN的特异度提高至91.6%。抗C1q抗体AUC为0.756,抗dsDNA抗体AUC为0.516。抗C1q抗体与抗dsDNA抗体水平呈正相关(r=0.358,P<0.01),与补体C3、C4呈负相关(r值分别为-0.443和-0.467,均P<0.01)。结论血清抗C1q抗体能客观反映SLE疾病活动性,有效指导LN的诊断。ROC曲线提示血清抗C1q抗体实验效能优于抗dsDNA抗体,两者联合检测可提高LN诊断的特异度。
简介:Photonics-basedradarwithaphotonicde-chirpreceiverhastheadvantagesofbroadbandoperationandreal-timesignalprocessing,butitsuffersfrominterferencefromimagefrequenciesandotherundesiredfrequency-mixingcomponents,duetosingle-channelreal-valuedphotonicfrequencymixing.Inthispaper,weproposeaphotonicsbasedradarwithaphotonicfrequency-doublingtransmitterandabalancedin-phaseandquadrature(I/Q)de-chirpreceiver.Thisradartransmitsbroadbandlinearlyfrequency-modulatedsignalsgeneratedbyphotonicfrequencydoublingandperformsI/Qde-chirpingoftheradarechoesbasedonabalancedphotonicI/Qfrequencymixer,whichisrealizedbyapplyinga90°opticalhybridfollowedbybalancedphotodetectors.Theproposedradarhasahighrangeresolutionbecauseofthelargeoperationbandwidthandachievesinterference-freedetectionbysuppressingtheimagefrequenciesandotherundesiredfrequency-mixingcomponents.Intheexperiment,aphotonics-basedK-bandradarwithabandwidthof8GHzisdemonstrated.ThebalancedI/Qde-chirpingreceiverachievesanimage-rejectionratioofover30dBandsuccessfullyeliminatestheinterferenceduetothebasebandenvelopeandthefrequencymixingbetweenradarechoesofdifferenttargets.Inaddition,thedesireddechirpedsignalpowerisalsoenhancedwithbalanceddetection.Basedontheestablishedphotonics-basedradar,inversesyntheticapertureradarimagingisalsoimplemented,throughwhichtheadvantagesoftheproposedradarareverified.
简介:摘要通过应用三菱Q06HPLC搭载各功能模块运用在一条16工位的产品自动组装生产线的电气控制系统。采用PLC运动控制模块精确定位部件的组装位置;组建由以太网通讯模块完成PLC与上位机及视觉系统之间的数据交换。
简介:目的探讨阿托伐他汀+辅酶Q10治疗冠心病早期心功能减退患者的临床效果。方法选取2018年1月-2018年12月在我所接受治疗的60例冠心病早期心功能减退患者为研究目标,运用区组的随机数字表按照11的比例分为对照组和观察组。对照组采用阿托伐他汀进行治疗,观察组采用阿托伐他汀联合辅酶Q10进行治疗,对两组患者的临床效果和心功能指标情况进行对比。结果观察组的临床效果显著高于对照组(P<0.05);治疗前,观察组和对照组的相关数据比较,差异不明显(P>0.05);治疗后,观察组LVEF、LVEDD、LVESD均低于对照组,差异显著(P<0.05)。结论对冠心病早期心功能减退患者采用阿托伐他汀+辅酶Q10进行治疗可以缓解患者早期心功能减退的症状,提高患者的临床效果。
简介:摘要目的探讨阿托伐他汀、辅酶Q10联合应用治疗冠心病早期心功能减退的效果。方法我院74例2017年2月至2018年11月冠心病早期心功能减退患者。随机分组,阿托伐他汀治疗组采取阿托伐他汀治疗,联合应用治疗组则采取阿托伐他汀、辅酶Q10治疗。比较两组冠心病早期心功能减退患者治疗总有效率;心功能好转2级;治疗前后患者左心室射血分数、E峰值、A峰值、E/A、左室舒张功能和收缩功能。结果联合应用治疗组疗效是100%,且左心室射血分数、E峰值、A峰值、E/A、左室舒张功能和收缩功能、心功能好转2级的时间和阿托伐他汀治疗组比较有优势,P<0.05。结论阿托伐他汀、辅酶Q10治疗冠心病早期心功能减退的临床效果确切,可缩短治疗时间,改善心功能。