简介：Basedonthetensoranalysisofwater-sedimenttwo-phaseflow,thebasicmodelequationsforclearwaterflowandsediment-ladenflowarededucedinthegeneralcurvecoordinatesfornaturalwatervariable-densityturbulentflow.Fur-thermore,correspondingboundaryconditionsarealsopresentedinconnectionwiththecompositionandmovementofnon-uniformbedmaterial.Thetheoreticalresultsareappliedtothecalculationofthefloatopencaissonintheconstructionperiodandgoodresultsareobtained.

简介：Thestructuralpropertiesofwateratdifferenttemperatureshavebeeninestigatedusingaflexiblewatermodelintheisothermal-isobaricensemble.Withdecreasingtemperature,thetetrahedralityofthedistributionofthewatermoleculesaroundthecentralwatermoleculeisenhanced,andthehydrogenbondsbecomemorelinear.Bymeansofaconjugategradientenergyminimization,dynamicalconfigurationsatvarioustemperatureshavebeenmappedontonearbypotential-energyminima,the50°-60°peak(P1)inthedistributionfunctionoftheO-O-Oangleofatrimerbecomesfarsmaller.HoweverthereappearstobeasmallbutobservabletemperaturedependenceofP1,i.e.thehigherthetemperature,thehighertheP1intensity.

简介：ThepotentiometricbehaviorofthechelatingionexchangeresinD751containingiminodiaceticacidgroupshasbeenstudiedat25℃bybatchtitrationwithalkaliandacidinwaterandinethanol-watermixturesolvent.Thetitrtioncurves,theamountofchemicallyboundcounter-ionsandinvasiveelectrolytesintheresinphase,andthesolventcontentstheresinhavebeeninvestigated.

简介：Thenumericalmethodsformiscibledisplacmentinaggregatedorsorbingmediumareconsidered.Amixedfiniteelementmethodisadoptedforthepressureequation.Theconcentra-tioninthemobilewaterisapproximatedbyacombinationofaGalerkinfiniteelementmethodandthemethodofcharacteristicsandtheconcentrationinimmobilewaterisapproximatedbyastan-dardGalerkinmethod.Themovingmeshtechniquewhichdependsontimetisadoptedhere.Themovingmeshescanvaryindifferentspacialdomainswithdifferentvariabletimes.OptimaerrorestimatesinenergynormandL2normareobtainedundercertainconstraints.

简介：WatersorptionisothermsavailableintheliteraturesofNa^+-fromofDowex50W×4and×8,BioRex-70,Amberlyst-15,Nafion-117,hydroustitaniumoxide,crystallinezirconiumphosphateandzinchexacyanoferrate(Ⅱ）,havebeenanalysedbytheD′ArcyandWattequation.HydrationofNa^+intheionexchangersisthepredominantinteractionofsorbedwater.Thecorrelationbetweenthehydrationnumbersandthoseobtainedforelectrolytesolutionisfoundinthispaper.Qualitativeimplicationsofthestateofsorbedwaterintheionexchangersonitsvariouscharacteristicquantitieslikeselectivity,arebrieflydiscussed.

简介：Astrongandhereditarysymmetryoperatorforamulticomponentwaterwaveequationisfoundwhichyieldsahierarchyofclassicalsymmetries.FurthermoreitisshownthatEq.(3.1)possessesnewsymmetrieswhichdependexplicitlyonthetime-variabletandallofthesymmetriesforEq.(3.1)formaninfinitelydimensionalLiealgebra.

简介：InthispaperweextendthemethoddevelopedinforlimitingStokeswaveofinfinitewaterdepthtocoverthecaseoffinitedepth.Themethodhashighefficiencyandtheresultisaccurate.

简介：Acousticimpulsesproducedthroughthemechanismofthelaser-inducedbreakdowninwaterhavebeeninvestigatedintherangefrom0℃toroomtemperature.Differentlyfromtheacousticimpulsesproducedviathermalexpansion,thepolarityandtheamplitudeofacousticimpulseproducedvialiquidbreakdownmechanismdonotchangewithwatertemper-ature.Thisindirectlyprovesthattheproductionofacousticimpulseisduetotheexpansionofthecavityitselfwhichincludesplasma.Asemiempiricaldescriptionofthisphenomenonisgiveninthispaper.

简介：Thepresenceoftracephosphatesintreatedwastewaterfrommunicipalitiesandindustriesisoftenresponsibleforeutrophicationproblemsinlakes,rivers,andotherwaterbodies.Inthispaper,wereporttheremovalofPO43-fromwaterbyusingapillaredrectoritethatwesynthesizedrecently.Theresultsshowthatcross-linkingcansignificantlyincreasetheadsorbingcapacityofNa-rectoriteforphosphates.ThepH,theconcentrationsofF,NH4+andCODaremainfactors,whichaffecttheresultsforpillaredrectoritetoadsorbphosphatesfromwater.TheOH-,andF-ionsdecreasethecapacitytoadsorbphosphates,whiletheCODandNH4+ionsincreaseit.

简介：ThecharacteristicsofsuspendedsedimentimagecanbereflectedbythecoefficientsofbiorthogonalwavelettransformofCDF(2,2).Basedonthepowerdistributionindifferentscales,anadaptivealgorithmisproposedinthispaper,wherebythecoefficientsareadjustednon-linearly.Theparticleinformationcanbewellretainedwhiletheuselessbackgroundisremoved.Inthisway,satisfactorybinaryimagecanbeobtainedforfurtheranalysisofthesedimentparticle.

简介：CatalyzedbyAgNO3,Mgwasfoundforthefirsttimetobeabletomediatethecouplingreactionbetweenaromaticaldehydesandbenzylbromideorchlorideinwater.TheyieldswereslightlyhigherthantherecentresultsforMg-mediatedallylationdespitethefactthataqueousbenzylationisintrinsicallymuchharderthanallylation.Itwasalsofoundthatthecouplingreactionwaschemoselectiveforaromaticaldehydesoveraliphaticaldehydes,andchemoselectiveforaromaticaldehydesoveraromaticketones.

简介：瞄准靠近环的水系统，由方法关上某些subcircuit，并且解决尖网络，另外的subcircuits的计算流动偏差，然后与各种各样的因素分析稳定性的变化的规则，后面的结论被获得：当在主要管子中减少抵抗时，subcircuits的增加的抵抗，系统稳定性能被改进。由改变力量的集中的规定没在系统稳定性上有影响；由改变电阻愿望减少系统稳定性的集中的规定。泵特征曲线影响系统稳定性，扁平的特征的稳定性比陡峭的优异。为直接回来系统(医生)，来自热来源最远的subcircuit的稳定性是最糟。为反向的回来系统(RRS)，在管子网络的中间的subcircuit的稳定性有最糟的稳定性。总的来说，RRS的稳定性低于医生关键词靠近环的水系统的-稳定性-流动偏差-直接回来系统-反向的回来系统CLC数字TK172

简介：Ourobjectiveisabetterunderstandingoftheroleofphysicalpropertiesofrealfluidsinthethermodynamicsofcavitationinimpurewater.Anextensiontotheclassicalhomogenousnucleationtheorysuitableformixturesispresentedinattempttoaddressthediscrepancybetweenthetheoreticalpredictionsandpracticalobservationsofcavitationratesinwateratnormaltemperatures.Theextensiontakesintoaccoutthenon-equilibrium(dissipative)effectsinvolvedinnucleiformationthroughasubstancedependentcorrectioncoefficienttobedeterminedexperimentally.Thetheoryofthermodynamicfluctuationsisappliedtoderivetheworkofformationofabubblenucleus.Thevalueofthecorrectioncoefficientisestimatedusingpreliminaryexperimentaldatafromaconvergent-divergentnozzle.Anapplicationoftheresultstothenumericalpredictionofthecavitationzonesinaradial-flowwaterpumpisshown.

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简介：D－riboseisaunique,5-carbonsugarthatoccursnaturallyinalllivingcells,D-ribosehasbeenusedasastaringmaterialforpreparationofsomecertainmedicinesorjustasanewnutraceuticalthathelpstheodynaturallyrestoreitsenergylevel,Thefermentativeprocessesarethebestfortheirrelativelysimpleseriesofproductionstepsandrelativelycheapstartingmaterials.However,becauseofthemanyimpuritiesinglucoseyeastwateranditsdarkcolor,pretreatmentandpurificationmustbedonetothefluidbeforeD-ribosecanbeseparated.Inthispaper,separationandpurificationofD-ribosewascarriedoutusingcationexchangeresins,ofwhichCa^2+exchangeresinhadthebesteffect.Theoptimalconditionforadsorptionisaflowvelocityof0.5BV/hatadsorptiontemperatureof25℃,Theoptimalconditionfordesorptionisaflowvelocityof0.5BV/hatdesorptiontemperatureof80℃。

简介：ThepreparationofconductingPPQfilmwasfirstreportedinthepreviouspaper.Itisveryinterestingthatthisfilmishighlysensitivetomoistureinair.ThehydrationanddehydrationofthefilmareaccompaniedbychangenotonlyincolorbutalsoinconductivityandUV-visiblespectrum.TheconductingPPQisreducedtoPPQandlosesitsconductivityafterbeingsoakedinwater.

简介：

简介：Theeffectofinitialconcentrationsonsolidificationofammoniumchloridewatersolutionisnumericallyinvestigatedindetail.Thesolidifyingprocess.withthecoldwalltemperaturelowerthantheeutectictemperature,isassumedtobeone-dimensional,andcontrolledbyheatconductiononly.Thesimulationrevealsthat:(1)Thesolid-mushinterfacegrowsinalinearmanner,whilethegrowthrateofthemush-liquidinterfacedecreasesinaparabolicmanner,withincreasinginitialconcentrations.(2)Thetemperaturefieldinthewholeregionhasparaboliccharacteristics,butisshowsalinearfeatureinthesolidzoneandmushyzone.(3)Theconcentrationalwayshaslinearcharacteristicsinthemuch.(4)Thesolidfractiondistributionisstronglyaffectedbytheinitialconcertration.Thesolidificationprocessshowsquitedifferentfeatures,especiallyatsmallandhighinitialconcentrations.

简介：γ-Aminobutyricacid(GABA)andseveralγ-glutamyloligopeptideswereisolatedandidentifiedfromwater-extractofginseng.

简介：Inviewofthepoorwatersupplysystem'snetworkproperties,thesystem'scomplicatednetworkhydraulicequationswerereplacedbymacroscopicnodalpressuremodelandthemodelofrelationshipbetweensupplyflowandwatersourcehead.Byusingpump-stationpressureheadandinitialtankwaterlevelsasdecisionvariables,themodelofoptimalallocationofwatersupplybetweenpump-sourceswasdeveloped.Geneticalgorithmwasintroducedtodealwiththemodelofoptimalallocationofwatersupply.Methodsforhandlingeachconstraintconditionwereputforward,andovercometheshortcomingsuchasprematureconvergenceofgeneticalgorithm;asolvingmethodwasbroughtforwardinwhichgeneticalgorithmwascombinedwithsimulatedannealingtechnologyandself-adaptivecrossoverandmutationprobabilitieswereadopted.Anapplicationexampleshowedthefeasibilityofthisalgorithm.