简介:Totesttheaccuracyofanewfingerprintscanner,researcherstypicallyrunmillionsofknownfingerprintimagesthroughthesystem'smatchingsoftware.Butthistestingprocedurecan'tquitemimicrealoperatingconditions,asa2-Dimagefedintoaprogramisfundamentallydifferentthana3-Dfingerpressedtoasensor.
简介:Myocardialperfusioniswellcontrolledbyadjustmentofvasomotortoneofre-sistancevessels.Thestaticandsamedynamicaspectsofcoronaryflowcontrolcanwellbedescribedbyassumingfeedbackfromtissueoxygenpressuretothecoronaryvessel.Theseresistancevesselsaresmallarteriesfrom400/mandlessinarteriolesdownto10/m.Itisnotclearyethowvesselsofdifferentsizecanbeunderthecon-troloftissuefactorsandhowadaptationoftoneinlargervesselsistunedtothatofsmallerones.
简介:Antibodies,alsoknownasimmunoglobulins,areincrediblyspecificandverygoodatstickingtomolecules.Theyareabletodiscriminatebetweenmoleculesthatvarybyaslittleasasingleatomandflagforeignorharmfulonesforattackorremovalbytheimmunesystem.Essentially,theyserveasthebackboneofthehumoralimmunesystem.This'exquisitespecificity'isimportanttopreventtheimmunesystemfrommistakinghealthy,humanproteinsandmoleculesfrominvadingones.However,
简介:Alongwiththeincreasinglyurgentmanagementneedsofintranetterminalsinhospital,andlargescaleddeploymentofterminalmanagementsystem,terminalaccesscontrolhasbecomeoneofthestandardfunctionsofterminalmanagement.Thispapermainlyaimsatsomesimpleresearchforthesystemconstructionofhospitalintranetterminalaccesscontrol.
简介:Theadditionofenvironmentalsensing,intheformofdepthsensing,tothecontrolofpowered,lower-limbprostheseswasproposed.Currently,thepredictionofwhichlocomotionmode-basedcontrollertousehasbeenperformedusingEMGfromtheresiduallimbandkineticsandkinematicsfromtheprosthesis.However,duetothevariabilityofEMG,kinetics,andkinematicsacrosstrials,days,andsubjects,itisdifficulttoproducerobustpredictionswithlowerrorrates.Thisworkfocusedonthede-
简介:Thispaperdevelopesatemperaturecontrolsysteminordertocarryoutarealtimeandcontinuousobservationonlivingcellsunderthemicroscope.Inthissystem,transparentindiumtinoxid(ITO)conductivefilmwasusedasaheater,temperaturewasmeasuredbythetemperaturedependenceofresistancebehavioroftheITOfilm,C8051F340single-clupwasusedasthecontrolhardwarecore,andthemodifiedPIDalgorithmandpulsewidthmodulation(PWM)wereadoptedasthekeycontrolsoftwareprograms.Thetemperaturesystemhadasimplestructurewithoutaddedtemperaturesensor,anuniformtemperaturedistributionwithin±1℃ontheITOfilmsurfaceandtemperaturecontrolprecisionof±0.2℃couldbeobtained.ThesystemcouldmaintainagoodgrowthstateforBHK-21livingcellunderthemicroscopefor48h.
简介:Inthispaper,acryosurgery-hyperthermiasystemisproposedfortakingadvantageofthealternatedcoolingandheatingtreatmentintumor.Anovelcontrolsystemisproposedtoensurethatthethermalsystemworkseffectively.Firstly,thetissuetemperaturearoundtheprobeisregulatedandkeptinadesiredrangewhenradiofrequencyablationisoperated.Secondly,precisecontroloftemperatureisachievedinhyperthermiatreatmentusingfuzzylogicPIDtypecontroller.Theresultsofexvivoliverexperimentdemonstratethatthissystemcouldprovidearathergoodperformancewiththeproposedcontrolmethod.
简介:客观:处于pathophysiological条件工作在试验性的动物学习mitochondrial氧化还原作用状态易感知地检测mitochondrial的早符号,例如局部缺血。方法:菸碱腺嘌dinucleotide(磷酸盐)的荧光,或NAD(P)H,在为cardiomyocytes的重要ATP供应负责的mitochondrial呼吸的主要电子施主,为mitochondrial功能的非侵略的荧光灯的探查被学习。在由由幽灵似地解决的相关时间的单个光子数的紫外脉搏的激光二极管和察觉(TCSPC)的生活cardiomyocytes追随者刺激的NAD(P)H荧光的检查,基于荧光系列和一生的同时的测量。结果:在生活老鼠cardiomyocytes表演的NAD(P)H荧光腐烂的动态特征至少一个3-exponential腐烂模型与0.4-0.7ns,1.2-1.9ns和8.0-13.0ns一生,是必要的描述cardiomyocyteautofluorescence(AF)。联系腐烂的系列(DSA)在cardiomyocytes揭示了NADH分子的4张幽灵似地不同的人口的存在与光谱在为短一生的水池的470nm最大第一次,并且在为中间、长一生的水池的450nm,470nm和490nm的排放山峰。由酉同类身体的增加的mitochondrialNADH内容比率提高了AF紧张,没有重要变化在荧光灯一生。毒鱼藤素,建筑群的禁止者我mitochondrial呼吸的链,增加了AF并且弄短平均荧光一生。二硝基酚(DNP),mitochondrial的一个解开的代理人氧化phosphorylation,降低的AF,拓宽光谱在520nm的肩膀并且增加了平均一生。这些效果,比得上在集中并且处于在vitro的NADH的除氢作用的率的变化,也在局部缺血模仿的conditions.Conclusion下面被检验:我们的调查结果从NADH期望两个conformationalNADH变化和精力转移的贡献到lipoamide脱氢酶(LipDH)界限黄素,为了解释,观察到荧光kinetics.Presented幽灵似地决定荧光一生途径在生活为mitochondrialNAD(P)H的分析提供有希望的新工具
简介:目的p27Kip1是一种细胞周期素依赖激酶抑制物,它抑制G1期的进程并对其进行调节。方法采用乳化-溶剂挥发法制备含p27kip1的纳米粒子,粒度集中分布在243~343nm,平均粒度为288.9nm,粒径呈窄分布,粒度分布指数为0.192。p27Kip1纳米粒子的载基因率为3%。包封效率为86%。p27Kip1基因纳米粒子的体外释放,开始的5d累积释放曲线接近直线,约1周后释放量开始变慢,释放曲线缓慢上升,可平稳维持释放2周以上。用p27kip1基因纳米粒子转染大鼠动脉平滑肌细胞,分为p27Kip1基因纳米粒子组、空白纳米粒子组、对照组,培养48h后收集细胞,流式细胞仪测定p27kip1纳米粒子对细胞周期调控的结果显示转染前细胞G1/G0期比例为92.4%,转染后48h,对照组及空白纳米粒子组G1/G0期比例为64.5%、68.3%,S期为12.4%、10.3%,表明G0/G1→S的过程非常迅速,细胞增殖活跃。而基因组G1/G0期比例为88.3%,S期为7.2%,说明细胞发生G1期阻滞,细胞增殖受到抑制。建立大鼠自体静脉移植模型,随机分成转基因治疗组、空白纳米粒子组、单纯静脉移植组,应用显微...