学科分类
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61 个结果
  • 简介:橡胶的水泥的磨损抵抗性质被作为添加剂拿硅石烟和面包屑轮胎橡胶比较地学习。磨损测试根据中国标准测试方法DL/T被进行51502001,二个推荐测试方法:在水方法和戒指方法下面,被使用。有8网孔和16网孔的筛尺寸的面包屑轮胎橡胶被代替沙并且作为添加剂的一样的体积合并到水泥。水泥的磨损抵抗根据磨损抵抗力量和集体损失被评估。测试结果证明硅石烟的增加提高了压缩力量和水泥的磨损抵抗,并且面包屑橡胶的增加减少了压缩力量,但是显著地增加了水泥的磨损抵抗。硅石烟水泥比控制水泥执行了一个更好的磨损电阻,并且橡胶的水泥比硅石烟水泥执行了一个好一些的磨损电阻。橡胶的水泥的磨损抵抗随橡胶内容的增加增加了。

  • 标签: 橡胶混凝土 耐磨性 硅粉混凝土 标准试验方法 耐磨损性 橡胶添加剂
  • 简介:Multi-cellmulti-usermultiple-inputmultiple-output(MC-MU-MIMO)isapromisingtechniquetoeliminateinter-userinterferenceandinter-cellcochannelinterferenceinwirelesstelecommunicationsystems.AsthelargenumberofusersinthesystemandthelimitednumberofsimultaneouslysupportableuserswithMC-MU-MIMO,itisnecessarytoselectasubsetofuserstomaximizethetotalthroughput.However,thefullycentralizeduserselectionalgorithmsusedinsinglecellsystem,whichwillincurhighcomplexityandbackhaulloadinmulti-cellcooperativeprocessing(MCP)systems,arenotsuitabletoMC-MU-MIMOsystems.ThisarticlepresentsatwocascadeduserselectionmethodforMCPsystemswithmulti-cellblockdiagonalization.Inthispaper,alocaloptimalsubsetofusers,whichcanmaximizethelocalsumcapacity,isfirstchosenbythegreedymethodineverycooperativebasestationinparallel.Then,allthecooperativebasestationsreporttheirlocaloptimaluserstothecentralunit(CU).Finally,theglobaloptimalusers,whichcanmaximizetheglobalsumcapacityofMCPsystems,areselectedfromtheaggregatedlocaloptimalusersattheCU.Thesimulationresultsshowthattheproposedmethodperformscloselytotheoptimalandcentralizedalgorithm.Meanwhile,thecomplexityandbackhaulloadarereduceddramatically.

  • 标签: MIMO系统 用户选择 多用户 回程 小区 多输入多输出
  • 简介:Sprayingtestwereconductedtwicebeforesteelslabswereputintothefurnaceandtheeffectsoftheoxidationresistancecoatingwereinvestigatedandverified.Bycomparingthechangeofslabweight,rollingforceoftheroughingmill&finishingmill,thicknessofoxidefilmonthesurfaceslabsbyanXL-30SEMandacidpicklingspeedofslabswithandwithoutcoating,itwasfoundthattheoxidizationwasteinthefurnacedecreasedby40percentwiththeuseofthecoatingandthecorrespondingyieldcapacitycouldincreaseby0.2percentatleast.Besides,thethicknessofoxidescalefilmonhotrolledproductswasreducedby1.44micrometersandtheacidpicklingtimewasshortenedby6swiththecoatingtechnology,whilethetotalrollingforceofRM&FMdidnotchanged.Furthermore,theapplicationprospectofthistechnologywasalsodiscussedinthispaper.

  • 标签: 工业性试验 涂层技术 耐氧化性 喷雾试验 轧制力 粗轧机
  • 简介:SlagcorrosionresistanceofMgOZrO2refractorieswasinvestigatedinthiswork.Theresultsindicatethatinanon-orientedelectricsteelslagsystemwithahighratioofcalciatosilica,theslagresistanceofMgOZrO2refractoriescanbedescribedasfollows:ZrO2reactswithCaOformingcalciumzirconatecompoundwhichstrengthensthematerialandblocksthechanneloftheslaginfiltration;however,inanorientedelectricsteelslagsystemwithahighconcentrationofsilicaandthelowratioofcalciatosilica,theslagcorrosionresistanceofMgOZrO2refractoriesisdifferent;ZrO2reactswithCaOformingthecalciumzirconateandsimultaneouslyonemoreproductC2Saswell;C2Scanimprovecorrosionresistancebyblindingporeandenhancingslagviscosity;therefore,itisexpectedtobethemajorreasonfortheenhancedcorrosionresistanceobservedforMgOZrO2refractories.

  • 标签: 耐腐蚀性能 耐火材料 氧化锆 氧化镁 二氧化硅 炉渣粘度
  • 简介:<正>Thishighlightarticlefocusesontheeffectsofdifferenttypesofexerciseonthepreventionandtreatmentoftype2diabetesandonfuturechallengesindevelopingeffectivepreventivestrategies.1.CurrentprevalenceofdiabetesinChinaCardiovasculardiseaseshavebecometheleadingcauseofdeathinChina.DiabetesisamajorriskfactorforcardiovasculardiseasesandtherapidchangeinlifestyleisthemainreasonfortheincreasedriskforcardiovasculardiseasesinChina.TheChina

  • 标签: CARDIOVASCULAR EXERCISE HIGHLIGHT LIFESTYLE METHYL
  • 简介:Multi-functionaldendrometerisakindofforestrytoolthatcanmeasuremultiplefactorsofforest.Bycombiningsensortechnologyandcomputertechnology,adigitalmulti-functiondendrometerhasbeendeveloped,whichintegratedthefunctionsofmeasuringheight,distance,azimuth,slope,elevation,formquotientofanypartsofthestemintoonebodyatthesametest.Thedendrometercanfitthecomplexforestenvironment,solvethedifficultproblemsinaspectsofplantheight,measuredistance,centraldiameterandformquotientofbreastheight.Theaccuracycanmeettherequirementsofgeneralforestsurvey.

  • 标签: DIGITAL multi-function DENDROMETER form QUOTIENT of
  • 简介:多代理签名是一位原来的签名人托付签署能力到一个代理组的一个计划。在计划,仅仅在代理组的所有代理签名人的合作能代表原来的签名人创造签名。Jin和皮脂腺囊瘤第一定义无证书的多代理签名(CLMPS)的正式安全模型并且建议了一个具体CLMPS计划。然而,他们的构造有三个问题:加强的安全模型的定义是不精密的,具体签名计划有一个安全缺陷,并且安全的证明是有瑕疵的。与进一步的考虑,一个补救加强的安全模型被重新定义,并且一个改进计划是也存在地求婚了,它是unforgeable对适应地,选择保证,选择消息和选择身份在随机的神谕攻击。处于这个条件,计算Diffie-Hellman(CDH)假设被用来为我们的CLMPS计划证明安全完整。

  • 标签: 代理签名 安全证书 DIFFIE-HELLMAN 数字签名方案 建筑模型 安全漏洞
  • 简介:在漂浮的身体附近的波浪衍射和放射在相当完美的液体在线性潜在的理论的框架以内被考虑。液体域在水平方向无穷地延长了,但是被排除身体waterplane的免费表面的海床,身体壳,和部分限制,并且根据身体几何学被细分进二子域。二子域被控制表面在液体连接。在每子域,速度潜力被使用包含格林功能的平常的边界积分表示描述。边界积分方程然后被建立由令人满意边界条件和越过控制的潜力和正常推导的连续条件出现。这个多域边界元素方法(MDBEM)为有包括平常的BEM介绍奇特和数字结果的慢集中给的moonpools的一种壳形式的身体特别地有趣。MDBEM的申请出现在moonpools学习水列的反响的运动MDBEM提供一个有效、可靠的预言方法。

  • 标签: 边界元法 耗散 边界积分方程 自由表面 水平方向 积分表示
  • 简介:Livermetastasessynchronouslyormetachronouslyoccurinapproximately50%ofcolorectalcancerpatients.Multimodalitycomprehensivetreatmentisthebesttherapeuticstrategyforthesepatients.However,theoptimalpatternofmultimodalitytherapyisstillcontroversial,anditraisesseveralsignificantconcerns.Liverresectionisthemostimportanttreatmentforcolorectallivermetastases.ThedefinitionofresectabilityhasshiftedtofocusonthecompletionofR0resectionandnormalliverfunctionmaintenance.Theroleofneoadjuvantandadjuvantchemotherapystillneedstobeclarified.Themanagementofeitherprogressionorcompleteremissionduringneoadjuvantchemotherapyischallenging.Theoptimalsequencingofsurgeryandchemotherapyinsynchronouscolorectallivermetastasespatientsisstillunclear.Conversionalchemotherapy,portalveinembolization,two-stageresection,andtumorablationareeffectiveapproachestoimproveresectabilityforinitiallyunresectablepatients.Severaltechnicalissuesandconcernsrelatedtothesemethodsneedtobefurtherexplored.Forpatientswithdefinitelyunresectableliverdisease,thenecessityofresectingtheprimarytumorisstilldebatable,andevaluatingandpredictingtheefficacyoftargetedtherapydeservefurtherinvestigation.Thisreviewdiscussesdifferentpatternsandimportantconcernsofmultidisciplinarytreatmentofcolorectallivermetastases.

  • 标签: COLORECTAL cancer LIVER METASTASES MULTIMODALITY THERAPY
  • 简介:到还原剂隧道噪音,褪色,并且内部用户的干扰有效地在有多用户的混乱通讯系统,一个盲目隧道均等算法基于双unscentedKalman,过滤器算法被建议。假设多输入多产量(MIMO)的系数隧道能被一个autoregressive模型,描述二个分开的州空间的代表被用于信号和系数。然后,二个unscentedKalman过滤器被用来同时估计混乱信号和隧道系数。模拟结果显示算法罐头有效地追踪以快集中速度在混乱MIMO通讯系统使隧道褪色的多路径的系数。

  • 标签: UNSCENTED卡尔曼滤波 混沌通信系统 多输入多输出 均衡算法 盲信道 卡尔曼滤波算法
  • 简介:Thepresentworkisaimedtostudythepharmacokineticparametersofoptimizedrepaglinidefloatingdrugdeliverysystem(FDDS)by24factorialdesigns,followedbycomparisonwithacommerciallyavailableformulation.Themaineffectsandinteractionsofformulationvariableswerestudiedbyusingnormalandparetocharts.Theoptimizedformulationshowsafickiandiffusiondrugreleasemechanism.Pharmacokineticparametersofthedesigneddrugdeliverysystemwereevaluatedinrabbitmodels.Meanwhileasimple,specifichighperformanceliquidchromatographicmethodwasdevelopedandvalidatedasperbiopharmaceuticalspecifications,thelinearitywasobservedattherangeof110-550ng/mL(r2=0.999).Byusingmethanol-phosphatebuffer(pH2.5)(70:30,v/v)asmobilephaseattheflowrateof1.0mL/minthevalidationshowsabetterretentiontimeof5.2minforrepaglinide.AndthesamevalidationmethodwasusedforpharmacokineticprofileanalysisofrepaglinidemarketedproductsandFDDS.Thecomparativepharmacokineticresultssuchastmax,half-life,areaunderthecurve,meanresidencetimeswereincreasedsignificantlyfortherepaglinideinFDDSthanthemarketedproductofrepaglinideexceptCmaxandeliminationrateconstant.

  • 标签:
  • 简介:Thispaperproposesanautomaticmethodofporecombinationrecognition,whichisanimportantfeaturetohardwoodrecognition.Afterextractingedgefromwoodmicroscopiccross-section,basedonareahistogramofthesimilarcircleregions,themethodclassifiesallregionsintotwoclasseswithmaximumbetween-classvariance,soastodistinguishtheporefromothertextures,whicharesimilarinshapesbutdifferentinsizes.Meanwhile,secondobjectivefunctionaboutaverageareaofclosedregionsisusedtoimprovetheporesegmentationperformance.Atlast,themethodusesadjacencydegreeofporesettojudgeporecombination.Theexperimentsdemonstratethatthetaskofporesegmentationcanbecompletedsuccessfullyforallkindsofporedistributionandcombination,andalsothecorrectcombinationsofporesaregiven.

  • 标签: ADJACENCY degree of PORE set MULTI-OBJECTIVE
  • 简介:Geoacoustic倒置为声学的域预言是重要的并且在浅水里匹配域本地化。梳火柴地倒置MFI和Reflectionloss倒置,多步为geoacoustic参数的贝叶斯的倒置被介绍。这个方法为随后的倒置作为优先的信息从一倒置使用了以后的概率密度PPD或倒置结果。首先,敏感参数被MFI决定。第二,感觉迟钝的参数被思考损失倒置基于PPD决定,倒置源于MFI。PPD结果比直接火柴地倒置,和一些参数的倒置结果显著地被改进的显示多步倒置方法更好被执行。为了在声音上表明多步倒置方法的优点,回答预言,传播损失的统计性质基于以后的概率被介绍。传播损失分发证明预言的声学的地基于多步倒置方法有更小的错误。

  • 标签: 多步 反转 匹配场反演 拖线阵 概率统计特性 小额信贷
  • 简介:这份报纸学习多相的thermoelasticcomposites的有效性质。把免费精力和吉布斯基于Helmholtz多相的composites的单个阶段,有效有弹性的张肌,热扩大的张肌,和特定的热的免费精力借助于体积一般水准被导出这些阶段免费精力。特别强调以经常紧张、经常压力的状况,修改Eshelby的micromechanics理论在被开发被放在有效的特定的热的新分析表情的推导上,在包括之间的相互作用被考虑。作为一个解说性的例子,为三阶段的thermoelastic的有效的特定的热的分析表示合成被介绍。

  • 标签: 弹性复合材料 有效热 亥姆霍兹自由能 解析表达式 吉布斯自由能 多相复合材料