简介：Anovelschemeemployinglow-densityparity-check(LDPC)codesinatmosphericopticalcommunicationsystemisproposed.Wedeploycoherentdetectionatthereceivingsideintheproposedscheme.Toreducebiterrorrate(BER)andenhancethesystemperformance,LDPCcodesareexploitedandcoherentreceiverisusedtoimprovethereceivingsensitivity.Experimentsareimplementedtoevaluatetheperformanceofthetransmissionsystem.Theatmosphericchannelattenuationsaresetto20-30dB/km.ThecoherentdetectionwithLDPCcodescanreducethereceivedpowerrequirementby~4dBmattheBERof10-9.

简介：Conceptofblackbox,conditionofmodelingandcontrolmethodswereintroduced.Takinghighpuritysilicabrickasanexample,thesilicabrickfeaturedwithhighpurity,lowporosity,lowtruedensityandhighstrengthwasdevelopedthroughproblemanalysis,testdesign,modelingandoptimization.Usinginformationtechnologytoupgraderefractoriesindustrywasdiscussed.

简介：BACKGROUND:Presently,over40kindsofduralgraftshavebeensuccessivelyusedinclinic.Amongthem,lyophilizedhumanduramaterwithgoodhistocompatibilityandlesscomplicationsisappliedmostwidely.Butthereareafewreportsoncasesofinfectedspongiformencephalopathyfollowingapplicationoflyodura.Moreidealrepairmaterialsdeservetobefurtherinvestigated.OBJECTIVE:Toinvestigatetheefficiencyandsafetyofbiologicalduralgraftmadebymeningesfromporkerstorepairmeningealinjury.DESIGN:Aself-controlobservation.SETTING:WuhanGeneralHospitalofGuangzhouMilitaryAreaCommandofChinesePLA.MATERIALS:SixteenNewZealandRabbits,ofeithergender,weighingfrom2to3kg,ofcleangradeⅡ,withtheageof0.5–1year,wereinvolvedinthisexperiment.TheinvolvedrabbitswereprovidedbytheAnimalExperimentalCenteroftheFirstMilitaryMedicalUniversityofChinesePLA.Biologicalsurgicalpatch(duralgraft)wasdevelopedbyGuangdongGuanhaoBiotechnologicalCo.,Ltd.Itwasprocessedbyusingmeningesfromporkersbytissueengineeringtechnology.METHODS:ThisexperimentwascarriedoutintheExperimentalCenterofthe157HospitalofChinesePLAbetweenDecember2003andJune2004.①Theexperimentalrabbitswereanesthetized.Duramaterwasexposedfromtwosidesofpostmediallineofcoronalsuture.Arectangularduramaterabout8mm×8mminsizewascutoff.Thenabiologicalsurgicalpatch(duralgraft)wasshearedintoinsertwith8mmdiameterandsutured.Theleftduramaterwasuntouchedandusedascontrol.Scalpwassutured,andpostoperativewoundhealingandrecoverywereobserved.②Theanesthetizedrabbitsweresacrificedatpostoperative3,14,30and90days,4rabbitsonce.Thewholeheadwascutoff,anditsscalpwasremoved.Afterwards,theheadwasfixedbyformalin.Tissuesinoperativesitewereobtained,performedroutineparaffinembedding,slicedandconductedHEstaining,finally,thesectionswereobserved.Whitebloodcellsinv

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简介：在我们担心的一些海区域附近获得长期的观察数据的尝试通常在很难或甚至不可能实际近海并且海洋工程状况。在这份报纸，借助于线性吝啬平方的评价方法，扩大短期的数据到长期的一个新方法被开发。长期的数据关于有关海，区域能经由从邻居获得的一系列长期的数据被构造海洋学的车站，通过不同数据的关联分析系列。在在多重线性回归模型采用的可变数字的数据系列，以及限制的长度之上盖住时间系列预言方法overdependence的不足是有效的。当分析数字选择的例子引用完成海洋学的车站，从位于山东半岛的三个海洋学的车站收集的暴风雨巨浪数据被拿(邻近concerning海区域)并且在为参考并且为分别地设计工程建设被选择的海地点之间的关联系数。由比较N年回来时期，计算从的价值观察了未加工的数据并且处理了借助于线性吝啬平方的评价方法从有限数据系列被扩大的数据，一个人能得出这个方法能在实际海洋工程给更加好的评价的一个结论，尽管有关于未加工、处理的数据的不同的极端值分布。

简介：Thecastablesforladlenozzleweredevelopedusingbrowncorundumasthemainrawmaterialandtherightamountsofcomplexadditives.Theinfluenceofseveraladditivesonthepropertiessuchasstrengthandpermanentlinearchangeofthesampleswasstudied.Theresultsshowedthatapplyingcomplexadditivesimprovedthestrengthandthevolumestabilityofthecastablesgreatly.Thecampaignofthecastablesforladlenozzlehasincreasedfromabout40heatsto70heats.

简介：Compressivesensing(CS)hasemergedasanovelsamplingframeworkwhichenablessparsesignalacquisitionandreconstructionwithfewermeasurementsbelowtheNyquistrate.AnimportantissueforCSistheconstructionofmeasurementmatrixorsensingmatrix.Anewdeterministicsensingmatrix,namedasOOC-B,isproposedbyexploitingopticalorthogonalcodes(OOCs),BernoullimatrixandSingerstructure,whichhastheentriesof0,+1and-1beforenormalization.Wehaveproventhatthedesigneddeterministicmatrixisasymptoticallyoptimal.Inaddition,theproposeddeterministicsensingmatrixisappliedtodirectionofarrival(DOA)estimationofnarrowbandsignalsbyCSarrays(CSA)processingandCSrecovery.TheoreticalanalysisandsimulationresultsshowthattheproposedsensingmatrixhasgoodperformanceforDOAestimation.ItisveryeffectiveforsimplifyinghardwarestructureanddecreasingcomputationalcomplexityinDOAestimationbyCSAprocessing.Besides,lowerrootmeansquareerror(RMSE)andbiasareobtainedinDOAestimationbyCSrecovery.

简介：硅(Si)经由钙硅酸盐的申请被供应了到植物到土壤；然而，因为它的低溶解度，钙硅酸盐的高剂量被要求。Nanoparticles能减少Si剂量并且被用于播种沟。这研究调查了液体Si来源的效果，即，高度可溶的硅酸盐(115.2gL1Si和60.5gL1Na2O)并且nanosilica(<200nm)，在Si上，由米饭的举起种，植物木质化，植物C:N:Pstoichiometry，植物生理学，和谷物在greanhousecondistions下面用Oxisol让步。处理包括了nanosilica和可溶的硅酸盐的申请到在0，605，1210，和2420g的Si剂量播种沟哈1。植物举起和处理效果被测量累积，生理的特征，和谷物米饭产出的C和木质素内容，Si，N，和P评估。在标志叶子的硅石身体和非结晶的硅石的免职用扫描电子显微镜学被分析。液体Si的申请在与控制的关系在米饭增加了Si累积47.3%(0g哈1Si)，不管Si，来源使用了。Nanosilica申请增加了叶木质素内容112.7%什么时候与那相比在控制。硅中等影响了网C吸收(增加了1.83%)并且蒸发率(增加了48.3%)；然而，Si影响了既不植物生长也不米饭的谷物产量。这些结果被关於生命或不能生活的应力的缺乏在实验期间在米饭植物解释。就我们的知识而言，在巴西农业，这在植物营养上作为Si化肥和它的效果是nanosilica的使用上的第一份报告。这研究提供米饭植物吸收并且积累nanoparticles的证据；然而，进一步的研究被要求在另外的植物种类调查nanoparticles的使用。

简介：Inthecourseofreductionofreformingcatalystbynothydrogenacertainamountofchlorinecontainingcompoundsisaddedtotherecyclehydrogentofacilitatethereductionofsulfates.Theoutcomeofcommercialapplicationofthistechniquehasrevealedthattheprocedureof"regenerationbychlorination→reduction→sulfateremoval→sulfidingandoilfeed-in"aimedatsulateremovalisverysimpleandcanrecoverthereactionactivityofreformingcatalystafterhavingbeenpoisonedbysulfates.Thisprocedurecanbedisseminatedforapplicationinrefineries.

简介：土地信息系统的不停的变化问题能通过重新分解和设计模式被解决。为了在开发再使用软件的土地信息系统支持设计模式和重新分解的方法的实现，设计，适用重新分解在土地信息系统开发的模式被讨论的到抽象工厂和装饰者设计的方法。

简介：Digitaldataofprecursorsisnotedforitshighaccuracy.Therefore,itisimportanttoextractthehighfrequencyinformationfromthelowonesinthedigitaldataofprecursorsandtodiscriminatebetweenthetrendanomaliesandtheshort-termanomalies.Thispaperpresentsamethodtoseparatethehighfrequencyinformationfromthelowonesbyusingthewavelettransformtoanalyzethedigitaldataofprecursors,andillustrateswithexamplesthetrainofthoughtsofdiscriminatingtheshort-termanomaliesfromtrendanomaliesbyusingthewavelettransform,thusprovideaneweffectiveapproachforextractingtheshort-termandtrendanomaliesfromthedigitaldataofprecursors.

简介：Accesscontrolinmulti-domainenvironmentsisoneoftheimportantquestionsofbuildingcoalitionbetweendomains.OnthebasisofRBACaccesscontrolmodel,theconceptsofroledelegationandrolemappingareproposed,whichsupportthethird-partyauthorization.Then,adistributedRBACmodelispresented.Finallytheimplementationissuesarediscussed.

简介：1FundamentalBusinessofSINOPECSINOPECisanintegratedenergyandchemicalcompanyengaginginupstream,midstreamanddownstreamoperations.ThebusinessofSINOPECcoversE&Pofoilandgas,refining,chemicalproduction,aswellassalesandmarketingofrefinedoilproducts.

简介：Ultrafastcoolingisanewtechnologywhichusedtocontrolthehot-rollingstripcoolinginrecentyearsontheinternationaldeveloped.Ifsuitablycooperatedwithanumberofothernewcontrolledrollingtechnologies,canachievefastandaccuratetemperaturecontrolinthehot-rolledstripproductionprocesstoobtaincorrespondingtransformationmicrostructureandidealmechanicalproperties.Thisarticledescribesthetechnicalprincipleandlayoutofultrafastcoolinginhot-rolledaswellasapplicationprofilesinthemajorironandsteelenterpriseinChinaandabroad.Carriedoutthelayoutofultrafastcoolinganalysisontheadaptabilityofsteelthatinstallbetweenthefinishingmillandlaminarcooling,onthisbasis,proposedtheuseofultrafastcoolingtechnologyproposals.

简介：Duringtheingotcastingprocess,theparametricchangesofthemoltensteelpouringprocessoftencausebothingotsurfaceandinternalqualitydefects.Withtheincreasinglywideapplicationofcomputersinindustrialtechnology,numericalsimulationsofthemoltensteelpouringprocessenablepredictionsofthedefectsthatwillariseduringthepouringandsolidificationprocess,especiallyforthemoltensteelflowduringtheearlystagesofcasting.Inaddition,usingacomputertosimulatethecastingprocessofa40tingotandsolidificationcanpreventmanydefects.Thesimulationresultsindicatethatcontrollingthepouringspeedtolessthan80kg/s,hangingthecastingpowderinamoldwiththehangingheightmaintainedat100-150mm,andcontrollingthetaperangleofthemoldbrickoutlettoasuitablelevelcanreducetheprobabilityofslagentrapmentandimprovetheinternalandsurfacequalityoftheingot.

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简介：Thedevelopmentstatus,productiontechnologyandcharacteristicsofMgO-CaOrefractoriesareintroduced,coveringMgO-CaOclinkers,firedMgO-CaObricksandunburnedMgO-CaO-Cbricks.TheapplicationsofMgO-CaOrefractoriesinsecondaryrefiningfurnacesincludingAOD,VOD,LF-VDandGORareintroduced.

简介：BycombiningChapman-EnskogexpansionwiththeBGKapproximationtoBaltzmannequationandNavier-Stokesequationwasobtained.AndanexpressionofDarcy'slawwasobtainedthroughtakingvariableaverageoverNavier-Stokesequationonsomerepresentativespaceinporousmedia,andfinallyanexamplewastakentoproveitsreliability.

简介：ThisstudydescribesanoverviewofthePOSCO'sBaosteel'sshort-flow(BSSF)slagprocessingproject,includingprocessflow,processset-up,equipmentcomposition,auxiliaryfacilitiesandrelevantparameters,aswellasabriefdescriptionofitsapplicationaftercommissioning.

简介：BasedonthecurrentsituationofChinaConstructionBIMtechnology,thisarticlediscussedtherequirementofBIMapplicationsinconstructionphase.BytheintroductionofPKPMBIM-basedConstructionManagementPlatform,themeaningoftheplatformapplicationwasrevealed.Finally,twoapplicationcaseswereshowntoexplainplatform’svalueandprospect.