简介:<正>1IntroductionSaltLake,asakindofchemicalresources,hasbeenattractedtomanyresearchers,especiallytheresourcesoflithium.Asreported,manykindsofbrinesexistintheworlddependingonthecompositionsofthebrine.Basedonthechemicalcompositionthebrinescanbeclassifiedasthetypesofchloride,carbonate,sulfate.Fordifferent
简介:Inmagneticresonanceelastography,oneseekstoreconstructtheshearmodulusfrommeasurementsofthedisplacementfieldinthewholebody.Inthispaper,wepresentanoptimizationapproachwhichsolvestheproblembysimplyminimizingadiscrepancyfunctional.Inordertorecoveracomplexanomalyinahomogenousmedium,wefirstobservethattheinformationcontainedinthewavefieldshouldbedecomposedintotwoparts,a'near-field'partintheregionaroundtheanomalyanda'far-field'partintheregionawayfromtheanomaly.Aswillbejustifiedboththeoreticallyandnumerically,separatingthesescalesprovidesalocalandprecisereconstruction.
简介:Basedonthehydrodynamicalfeatureandthetheoreticalvelocityprofilesoftidalflowandwind-inducedflowinshal-lowsea,acomputationalmodelisestablishedforthefirsttime,whichcanseparateobservedvelocityintotidalvelocityandwind-inducedvelocitybyuseoftheleastsquaremethod.Withthemodel,notonlythesurfacevelocitiesoftidalflowandwind-inducedflowareobtained,butalsothebedroughnessheightisdeterminedandthewindvelocityabovethewa-tersurfaceisestimated.Forverificationofthemodel,theobservedvelocityintheYellowRiverEstuaryandthelaborato-rytestisseparated,thenitisappliedtotheYangtzeRiverEstuary.Alltheresultsaresatisfactory.Theresearchresultsshowthatthemodelissimpleinmethod,feasibleinprocessandreasonableinresult.Themodelisavalidapproachtoanalysisandcomputationoffielddata,andcanbeappliedtoseparatetheobservedvelocityinshallowsea;atthesametime,reasonableboundaryconditionsofthesurfaceandbottomcanbeobtainedfortwo-andthree-dimensionalnumericalsimulation.
简介:Thefeasibilityofrecoveringglutamicacidbyionexchangemethodwithmacroporousresinswasinvestigated.Theiradsorptionpropertiesinstatistateandtheeffectivefactors,suchaspH,concentrationofeeedandtheratioofammoniumiontoglutamicacid,weresystematicallyexplored.Thebestconditionofseparatingglutamicacidfrommotherliquidwereobtained.
简介:客观;在脚关节关节上学习远侧的tibiofibularsyndesmosis的分离的影响并且比较各种各样的起作用的方法以便为分开的远侧的tibiofibular韧带联合发现合适的稳定。方法:从1997年7月到2002年7月,我们对待87个病人(64男性和23女性,变老18-54年)与distaltibiofibular韧带联合的分离,在谁之中,79与踝的骨折被相结合。Manipulativereduction,有cancellous螺丝钉的内部固定和有灰浆支持的外部固定在37个病人,有为腓骨的骨折的板和螺丝钉的固定和固定上被执行为34个病人上的远侧的tibiofibular韧带联合的withcancellous螺丝钉,和有peroneus的腱的distaltibiofibular系带的修理渴望我们,分开的distaltibiofibular韧带联合的减小,和有16个病人上的cancellous螺丝钉的固定。当远侧的tibiofibular韧带联合与cancellous螺丝钉被修理时,脚关节关节是为30°的dorsiflexed。并且cancellous螺丝钉在操作以后在8-10星期被拿出。结果:这些病人被跟随在上面为至少二年。药品效果根据病人的抱怨被估计,脚关节的轮廓,功能和无线电报连接;优秀in55病人(63%),在14个病人(16%)在18个病人(21%)好、公平。distaltibiofibular韧带联合的分离在为长与peroneus的腱修理远侧的tibiofibular系带经历了一个手术的2个病人复发了我们并且恢复。一个cancellous螺丝钉被折断。没有坏死在脚关节榫眼的前面的皮肤发展了。结论:远侧的tibiofibular韧带联合的分离能与各种各样的合理操作被对待。长与peroneus的腱修理我们能为远侧的tibiofibular韧带联合的完全的分离得到优秀结果。
简介:Theeffectofresinstructureondesalinationofligninsolutionwasinvestigated,theoptimalstructureofresinisasfollows;crosslinkingdegreeas4%,ratioofcationogentoanionogenisnear1.withsuchresinthedesalinationofligninwasproducedverywellbecausetheresinhasbothmoleculesievingandionretardationproperties.Thesulfonationdegressofligninandtotalsaltcontentofligninsolutionweredeterminredwithionexchangetechnique,therelativeerrorlessthan1%.Thesaltcontentofsmallmoleculeintheligninsolutionwascalculatedfromsulfonationdegreeofligninandtotalsalt.Amonggelandmacroporousresinsthebestseparationofligninfromreducingsugarwasachievedwithinterpenetratingsulfonatedresin2×1.5×1.Theseparationofligninwithinterpenetratingresinwascarriedoutsimultaneouslywithfractionationoflignin,theeffectoffractionationwithmacroporoussulfonatedresinisbetterthanthatwithinterpenetratingresin,buttheformerhasadefinitesorptionofligninwhichdecreasedtherecoveryoflignin.
简介:高度有效的汽轮机用尽更弥漫没有与汽轮机的最后旋转的排考虑不稳定的相互作用,不能被设计。在文学描述的以前的调查为改善与涡轮机器的另外的部分的相比显示出一个很高的潜力更弥漫。一台典型煤气的汽轮机的一个规模模型用尽更弥漫试验性地被调查。为了调查旋转的影响,醒来,没有象有有2公里的一个可变速度的旋转圆柱的轮辐车轮的大小一样的一个说的车轮的大小--或模仿汽轮机转子的10公里轮辐醒来被做。象2D-Laser-Doppler-Velocimeter(LDV)一样的使小型化的3洞灵魂探针被用来调查速度侧面。122静态的压力拍被用来测量几轴、环绕的静态的压力分布。没有一个轮辐车轮环形更弥漫在笼罩分开因为所有打漩配置。为有2公里轮辐车轮的大小,分开更弥漫当使测试钻塔操作参数不变时,是不稳定的。为一非旋转10公里轮辐车轮并且以旋转速度不到1,000rpm,环形更弥漫在笼罩分开了。增加10mm轮辐车轮的旋转速度,流动不比没有轮辐,车轮完成在笼罩和高得多的压力恢复分开了。
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简介:TherearetwomajorapproachesforBlindSignalSeparation(BSS)problem:MaximumEntropy(ME)andMinimumMutualInformation(MMI)algorithms.BasedontherecursivearchitectureandtherelationshipbetweentheMEandMMIalgorithms,anExtendedME(EME)algorithmisproposedbyusingprobabilitydensityfunction(pdf)estimationoftheoutputstodeducethecorrespondingiterativeformulasinBSS.Basedonthesimulationresults,itcanbeconcludedthattheproposedalgorithmhasbetterperformancesthanthetraditionalMEalgorithminconvolutemixtureBSSproblems.
简介:Anovelpressurizedcapillaryelectrochromatography(PCEC)wasdevelopedtoseparatebaxicdrugsonstrongcationexchange(SCX)column.TheseparationresultbyusingPCECwasbetterthanthatbyusingmicro-HPLC.Theeffectsofelectricalfieldandpressureonplateheightandresolutionwereinvestigated.Influencesoforganicmodifier,ionicstrengthandpHvalueofbufferonretentionbehaviorwereevaluated,andtheseparationmechanismwasalsodiscussed.
简介:TheseparationofxyleneisomersusingGCisamuchdifficulttaskforalongtime,ontheotherhandtheyareveryimpoFtantindustrialmaterials,sofindingagoodstationaryphasehasbeenaninterestingwork.Anexcellentseparationofxyleneisomerswasobtainedbyusing2,6-di-O-pentyl-3-O...