简介:本文用一阶导数差示脉冲极谱法(FDDPP)对链霉素、青霉素G、土霉素,用二阶导数差示脉冲极谱法(SDDPP)对氯霉素、卡那霉素、核糖霉素进行了定量研究。链霉素、青霉素G、土霉素、氯霉素、卡那霉素、核糖霉素分别在200~700μg·ml-1,35~210μg·ml-1,10~60μg·ml-1,32~192μg·ml-1,150~900μg·ml-1,80~480μg·ml-1的范围内与导数差示脉冲极谱峰幅值呈极为显著的线性关系(P<0.01)。链霉素、青霉素G、土霉素、氯霉素、卡那霉素、核糖霉素的峰电位、检测限分别为0.100V,5.6×10-8mol·L-1,-1.400V,8.0×10-9mol·L-1,-1.536V,6.9×10-7mol.L-1,-0.060V,60×10-9mol·L-1,-0.370V,4.6×10-8mol·L-1,和-0.105V,7.2×109mol·L-1。方法简便、快速、灵敏,结果准确。
简介:Inthispaper,wetheoreticallyandnumericallystudyacombinedmonopole–dipolemeasurementmodetoshowitscapabilitytoovercometheissuesencounteredinconventionalsingle-wellimaging,i.e.,thelowsignal-to-noiseratioofthereflectionsandazimuthambiguity.First,theazimuthambiguity,whichexistsextensivelyinconventionalsingle-wellimaging,issolvedwithanimprovedimagingprocedureusingcombinedmonopole–dipoleloggingdatainadditiontoconventionalloggingdata.Furthermore,wedemonstratethatthedirectwavespropagatingalongtheboreholeswithstrongenergy,canbeeffectivelyeliminatedwiththeproposedcombinedmonopole–dipolemeasurementmode.Thereflectionsarethereforepredominantinthecombinedmonopole–dipoledataevenbeforethesignalsarefiltered;thus,thereflections’arrivaltimesineachreceiverareidentified,whichmayhelpminimizethedifficultiesinfilteringconventionalloggingdata.Theoptimizedprocessingflowofthecombinedmeasurementmodeloggingimageisgiveninthispaper.Theproposedcombinedmonopole–dipolemeasurementmodemayimprovetheaccuracyofsingle-wellimaging.
简介:摘要:在新时代环境影响下,国内科技水平正在不断进步,人们的生活质量也越来越好。为了更好的改善城市环境,目前城市街道上清洁道路的各类洗扫车产品也受到了更多的关注。目前单发洗扫车的应用正在逐渐普及,为了更好的提升单发洗扫车的清洁水准,就必须要对其扫刷速度进行优化调整。因为单发洗扫车的清洁能力是和其扫刷机构的运行速度成正比的,为了进一步优化单发洗扫车的应用水准,就必须要对其扫刷机构速度特性展开深入探究,对其扫刷马达等结构特点做出全面的分析,以此来让单发洗扫车的扫刷速度调节方式得到有效优化,让其能够根据不同的路况利用不同的扫刷转速进行工作,从而达成最佳的清扫水准。