简介：Adirect-currentairplasmajetoperatedunderwaterpresentsthreestablemodesincludinganintermittently-pulseddischarge,aperiodically-pulseddischargeandacontinuousdischargewithincreasingthepowervoltage.Thethreedischargemodeshavedifferentappearancesfortheplasmaplumes.Moreover,gapvoltage-currentcharacteristicsindicatethatthecontinuousdischargeisinanormalglowregime.Spectrallinesfromreactivespecies(OH,N_2,N_2~+,H_α,andO)havebeenrevealedintheemissionspectrumoftheplasmajetoperatedunderwater.SpectralintensitiesemittedfromOHradicalandoxygenatomincreasewithincreasingthepowervoltageorthegasflowrate,indicatingthatreactivespeciesareabundant.Thesereactivespeciescausethedegradationofthemethylenebluedyeinsolution.Effectsoftheexperimentalparameterssuchasthepowervoltage,thegasflowrateandthetreatmenttimeareinvestigatedonthedegradationefficiency.Resultsindicatethatthedegradationefficiencyincreaseswithincreasingthepowervoltage,thegasflowrateorthetreatmenttime.Comparedwithdegradationintheintermittently-pulsedmodeortheperiodically-pulsedone,itismoreefficientinthecontinuousmode,reaching98%after21mintreatment.

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简介：在这份报纸，塑造建筑群的遥远地操作的车辆(ROV)的数字建模并且模型测试被显示出。纸强调了在塑造建筑群的ROV上用计算液体抑制动态软件ANSYS-CFX的水动力学的系统的建模，不是的一个惯例通常适用。为在发展阶段期间测试的起始的设计和原型，用一个免费腐烂的实验的小规模的测试被用来验证从ANSYS-CFX获得的理论模型，模拟结果被显示与试验性的测试与一致。建议方法能决定抑制ROV的系数的水动力学。

简介：Thispaperpresentstheresultsofaluminumsurfacetreatmentbydiffusecoplanarsurfacebarrierdischarge.Thegoalsaretostudytheeffectivenessoftheplasmatreatmentandthedependenceofitsefficiencyonoperationparameters,suchassample-to-electrodedistance,treatmenttimeorgasatmosphere.Threetypesofaluminummaterials(bricks,sheetsandthinfilms)weretestedtoensurethereliabilityofthetreatment.Thechangesinthesurfacepropertieswerecharacterizedbythesurfacefreeenergy,atomicforcemicroscopy,attenuatedtotalreflectanceFouriertransforminfraredspectroscopy(ATRFTIR)andX-rayphotoelectronspec-troscopy(XPS).Theinfluenceofagingeffectonthetreatmentwasalsomeasuredanddiscussed.

简介：Amulti-bodycoupleddynamicmodelisdevelopedtosimulatethemotionofaTetheredRemotelyOperatedVehicle(TROV)system.AstrongnonlinearcouplingmotionbetweenumbilicaltetherandROVisdiscussed.ThemovementofROVisconsideredassix-degreesoffreedom.Thelumpedmassmodelisappliedandanaveragedtangentialvectortechniqueisincludedinthethree-dimensionaldynamicresponseequationsofthecable-segments.Themodelcansimulatethethree-dimensionaltransientcoupledmotionofthecomplexmulti-bodysystemintypicalshipmaneuveringconditionsandcanbeusedineitheratowingproblemoratetheredunderwatervehicleproblem.Simulationresultsareseentofitwellwiththeexperiment.