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简介：ThefracturetoughnessandfractureworkofAl2O3/SiCprismaticceramiccompositeswasevaluatedinthispaper,whichshowedthefractureenergywasimprovedgreatly.Basedontheobservationforcrackpropagationandfracturemorphology,thefracturebehavioroftheprismaticcompositeswasanalyzed.Inthebendingtest,thecompositesdisplayedanon-catastrophicbehaviorandagracefulfailurewithreasonableload-carryingcapability.

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简介：macroporous的吸着性质为La3+离子的弱酸树脂(D113)被化学分析和红外系列学习。试验性的结果显示D113树脂在pH=为La3+有一个好吸附能力6.0在HAc-NaAc媒介。静态地浸透的吸附能力是273.3mg/g。La3+/Ce3+，La3+/Gd3+，La3+/Er3+，和La3+/Y3+的分离系数分别地是2.29，3.64，4.27，和0.627。吸附的明显的激活精力，Ea是吸着的18.4kJ/mol，热力学参数H，S，和G是4.53kJ/mol，61.8J/(mol.K)，?13.9kJ/mol分别地。为La3+的D113的吸附行为服从Freundlich等温线。在树脂上吸附的La3+能是由2.0mol/LHCl份量上的eluted。

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简介：DynamicbehaviorofsinglepileembeddedintransverselyisotropiclayeredmediaisinvestigatedusingthefiniteelementmethodcombinedwithdynamicstiffnessmatricesofthesoilderivedfromGreen’sfunctionforringloads.Theinfluenceofsoilanisotropyonthedynamicbehaviorofpilesisexaminedthroughaseriesofparametricstudies.

简介：Withthecontinuousimprovementofproductqualityandfunction,thequalitycontrolofmoldsteelisbecomingincreasinglystricter.Argonprotectionisessentialforensuringcastingqualityduringingotcasting.Thedevelopmentofargonprotectioniningotcastingandtheproductionprocessofenclosedargonprotectionin40tlineisdiscussed,withparticularfocusgiventhefactorsaffectingtheflowofoxygenintheargonprotectioncoverarediscussed.Theinfluenceofsomerelatedfactorsontheoxygencontentisanalyzed.Onthebasisoftheonlinemeasurementsoftheoxygencontent,theoptimizedoperationalapproachesforimprovingtheeffectofargonprotectionaredeveloped.Thiscandecreasetheliquidsteelviasecondaryoxidation,andimprovethequalityoftheingots.

简介：一个有力的数字模型的发展长有模仿具体材料的破裂行为是在地震工程的主导的研究区域之一。一个可靠模型应该能足够地代表裂缝的不连续的特征并且在复杂装载条件下面模仿各种各样的失败行为。在这篇论文，数字明确的表达，它合并一个复杂僵硬塑料的接口联合弄软的结合的组成的模型，接触，磨擦并且砍膨胀进XFEM，被建议描述具体材料的各种各样的裂缝行为。为精确地在断绝的双方上装配贡献到弱形式的一个有效数字集成计划被介绍。建议方法的有效性被模仿几著名试验性的测试估计了。数字方法罐头成功地捕获裂缝路径并且精确地预言具体结构的破裂行为，这被结束。混合模式破裂行为上的mode-II参数的影响进一步被调查更好决定这些参数。

简介：Aluminamagnesiacastablecruciblespecimenswerepreparedusingtabularcorundum(≤5mm),fusedmagnesiapowder(≤0.088mm),fusedspinelpowder(≤0.044mm),andα-Al2O3micropowder(d50≤0.7μm)asmainstartingmaterials,batching,mixing,shaping,anddrying.Slagresistancewasdeterminedbystaticcruciblemethodat1600℃for3hadoptingtwoladleslagswithdifferentbasicities(3.40and1.03).Thecorrosionandpenetrationindexesandmicrostructurecharacteristicsofthespecimensafterslagresistancetestwereanalyzedtostudythecorrosionbehaviorsofthetwoslagstoaluminamagnesiacastables.Theresultsshowthatthecorrosionofthelowbasicityslagtoaluminamagnesiacastablesismuchmoreseriousthanthatofthehighbasicityslagforthattheirreactionswithcastablesformdifferentproducts;forthelowbasicityslag,themulti-phasecoexistenceofCA6andcompoundsofCaO-Al2O3-SiO2inthematerialstogetherwithvolumeexpansioncausedbytheformationofCA6intensifytheslagcorrosionandpenetration;forthehighbasicityslag,thereactionbetweenslagandcastablesgeneratesaCA2denselayerandalargeamountofin-situMAintheinterface,reducingtheslagcorrosiontothematerialseffectively.

简介：TheauthorsstudytheasymptoticbehaviorofthesmoothsolutionstotheCauchyproblemsfortwomacroscopicmodels(hydrodynamicanddrift-diffusionmodels)forsemiconductorsandtherelatedrelaxationlimitproblem.First,itisprovedthatthesolutionstothesetwosystemsconvergetotheuniquestationarysolutiontimeasymptoticallywithoutthesmallnessassumptionondopingprofile.Then,verysharpestimatesonthesmoothsolutions,independentoftherelaxationtime,areobtainedandusedtoestablishthezerorelaxationlimit.

简介：ＮＵＭＥＲＩＣＡＬＳＩＭＵＬＡＴＩＯＮＳＯＦＷＨＯＬＥＦＩＥＬＤＢＥＨＡＶＩＯＲＦＯＲＲＯＵＮＤＢＵＯＹＡＮＴＪＥＴＬｉＷｅｉ，ＨｕａｉＷｅｎ－ｘｉｎ（ＷｕｈａｎＵｎｉｖｅｒｓｉｔｙｏｆＨｙｄｒａｕｌｉｃａｎｄＥｌｅｃｔｒｉｃＥｎｇｉｎｅｅｒｉｎｇ，...

简介：Theelasticbehaviorofsaturatedporousmaterialsunderundrainedfreezingisinvestigatedbyusingaporomechanicalapproach.Thermodynamicequilibriaareusedtodescribethecrystallizationprocessofthepartiallyfrozensolutioninbulkstateandconfinedstateinpores.Byphasetransitionatfreezing,fusionenergy,thermalcontractionofsolid,solutionandicecrystals,volumechangesofcrystallizationbuildupremarkableporepressurethatinducesexpansionorshrinkageofsolidmatrix.Owingtothelowerchemicalpotentialwhenporewatermixeswithsalts,fewericeformsinpores.Penetrationoficeintotheporousmaterialsincreasesthecapillarypressure,butlimitse?ectontheporeliquidpressureandthestrainofsolidmatrix.Onthecontrary,theporepressureinducedbysolutiondensityrisesassaltconcentrationincreasesandcausessignificantshrinkageofsolidmatrix.

简介：许多尝试被做了为学习微粒媒介的行为为不同参数和某些组成的模型发现各种各样的关系。所有这些模型基于连续媒介的概念。用象分离元素方法那样的一个数字方法，一个人能弄明白什么正在发生通过一玷污粒子的不连续的媒介在介绍shear力量和变丑特征起主要作用。有易碎的粒子的媒介的行为与非易碎的粒子在这份报纸并且与集会的相比被学习。在这份报纸，夸张有弹性的模型被调查因为多角形的集会在二个不同测试系列塑造了粒子。另外，象卷紧张，磨擦的角度，膨胀性的角度和有弹性的模量那样的汇编的不同的宏参数的进化为非易碎、易碎的土壤粒子两个都在模拟测试期间被学习。在结束，参量的研究在集会行为上在粒子破裂的力量的效果上被执行。

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简介：Withthefrequentoccurrenceofagriculturalproductsafetyincidentsinrecentyears,theagriculturalproducts’qualitysafetyhasbecomemoreandmoreconcernedbythepeople.Therelevantsubjectsarethedirectrelationshipwiththequalitysafetyofagriculturalproducts,andplayakeyroleinensuringthequalitysafetyofagriculturalproducts.Thispaperanalyzesthebehaviorperformanceofproductionsubject,circulationsubject,consumptionsubject,supervisionsubjectonagriculturalproducts’qualitysafety,andputsforwardthefollowingcountermeasurestoimprovethequalitysafetyofagriculturalproductsaccordingtotheirbehaviorperformance:toregulatetheproductionofagriculturalproducts,tostrengthenthemanagementandcontrolagriculturalinputs,toimprovethesafetysupervisionsystemofagriculturalproducts,toacceleratethedevelopmentofnewcirculationsubject,toactivelycultivateanddevelopnewtypesagriculturalbusiness,toacceleratetheprocessofagriculturalscalemanagement,toestablishthemultiplesupervisionsubject,andtomakeuptheregulatoryloopholes.

简介：Photoisomerization(trans-cis)ofazoaromaticcompoundshasbeeninvestigatedextensivelyusingabsorptionspectroscopysince1950s[1].Byirradiationwithlightofwavelengthλ1orλ2,thegeometricconfigurationoftheazobondinazobenzenebasedcompoundscanbereversiblyswitchedfromtranstocis.Thetwostateshavedistinctabsorptionspectra.Thisfeaturewouldallowreversiblestorageofdataonthebasisofcisandtransstateswiththeaidofλ1andλ2.However,thecisstateisthermodynamicallyunstablewithrespecttothetransstate,thereforeathermalrelaxationprocessoccursinthedark(atroomtemperature).Thisthermalback-reactionstronglylimitsthelifetimeofthecisstate,anditisinfluencedbythesubstituentR1andR2,catalysts,temperature,andenvironment(solventpolarity,typeofpolymermatrix)[2].