简介:the way a military general organises his army would affect the behaviour of the troops in battle. In the same way,the general must change his strategy accordingly. In other words,an existing organisation or structure should not be viewed as constraints to change if the strategy dictates that the change is necessary. In this aspect
简介:the way a military general organises his army would affect the behaviour of the troops in battle. In the same way,the general must change his strategy accordingly. In other words,an existing organisation or structure should not be viewed as constraints to change if the strategy dictates that the change is necessary. In this aspect
简介:Wettingandspreadingprocesseswhichinvolvesurfactantsolutionsarewidelyusedinnumerousindustrialandpracticalapplicationsnowadays.Theperformanceofdifferentnon-ionicsurfactantsmayvarysignificantlyandsofarsuperspreadersolutionsshowthemostpromisingspreadingability.Theadditionoftrisiloxanesurfactantstowaterwasproventoenhancewetting,evenonhydrophobicsurfaces,onwhichconventionalsurfactantsseemtohavelittleornoeffect.Althoughtheseextraordinarysurfactantshavebeenextensivelystudiedoverrecentyears,completeunderstandingoftheirunderlyingmechanismsandasuitablemathematicalmodelarestilllacking.Herewepresentapossibleexplanationfortheimpressiveperformanceoftrisiloxane,whichiscomparedtowettingenhancementofaconventionalsurfactant.Additionally,wewillexplainwhythehydrophobicityofthesurfaceisacrucialfactorforthespreadingphenomenon.LightwillbealsoshedontheeffectofthepHofthesolutiontowhichsurfactantsareadded.Finally,wewillinvestigatelong-termeffectsofthewaterenvironmentontrisiloxanewettingabilityanddiscussifageingmaysignificantlyaffecttheirperformance.
简介:Thevolumesperoxygenofsomesilicatemeltshavebeencalculatedandthencomparedwiththoseofsilicateglasses.Itissuggestedthatthevolumeofasilicatemeltcanbedividedintotwoparts.Oneiscontributedbythesilicon-oxygennetworkandtheotherbythe“oxides”.VariationpatternsofVPOssuggestthatthevolumeoftheSi-Onetworkgenerallyremainsunchangedandtheexpansionofthemeltiscausedmainlybythelocatexpansionofthe“oxides”.ItisfurtherproposedthattheradiusofO^2-showslittlevariation,instrikingcontrasttotheradiusofcations.Themechanismgoverningtheexpansionisdiscussedindetail.
简介:这份报纸在小粒的固体的体积回答上检验严肃的影响。在这研究的装载情形包括限制压缩,杆穿入进小粒的媒介并且通过一个孔排出。类似的装载和流动条件是可能的在表土在在situ资源利用过程包括的地球外的探索活动受到的压力和变丑政体被遇到。球形、非球形的粒子用分离元素方法(DEM)被学习。虽然DEM逐渐地被用来为小粒的固体建模,模拟结果的小心的确认是相当稀罕的。因此除了探索严肃的效果,这份报纸也在陆上的状况下面把DEM模拟与实验作比较验证DEM是否能生产令人满意的预言。陆上的实验与大照顾被进行并且用DEM仔细模仿了。为粒子的关键机械、几何的性质在DEM模拟为使用在实验室测试被测量。一系列DEM计算然后在减少的严肃下面被执行在地球外的环境下面模仿这些实验。严肃没在限制压缩盒子中在力量传播上有显著效果,这被发现;在杆穿入的装载坡度与严肃线性地成正比;在地窖分泌物的集体流动率是比例的与减少严肃摆平严肃和休息增加的角度的根。这些调查结果与期望一致并且存在科学证据。
简介:Experimentsshowthatsiltsandsiltysoilsexhibitcontractionfollowedbydilationduringshearingandtheslopeoffailurelinedecreasesatlargestrains,termedasphasetransformationbehaviour.Thispaperistodevelopanewmicromechanicalstress-strainmodelthataccountsforthephasetransformationbehaviourbyexplicitlyemployingthephasetransformationlineanditsrelatedfrictionangles.Theoverallstrainincludesplasticslidingandplasticcompressionamonggrains.Theinternal-frictionangleatthephasetransformationstateandthevoidstatevariableareemployedtodescribethephasetransformationbehaviour.ThemodelisexaminedbysimulatingundrainedanddrainedtriaxialcompressiontestsperformedonPiteasilts.Thelocalstress-strainbehaviourforcontactplanesisalsoinvestigated.更多还原
简介:我们在场散开的一个计算机模型与线arseed限制了聚集。有改变线性种子长度的簇被模仿,并且他们的模式结构,分数维的尺寸和多分数维的光谱被获得。如果它的长度比较地更短,模拟结果证明线性种子长度在聚集簇的模式结构上有小效果。与它的增加,线性种子长度有更强壮的效果在模式结构,当尺寸D-f减少时。当线性种子长度更大时,相应模式结构同样地是生气的。线性种子长度越大,越多明显有在二点聚类的更多的粒子的跨like结构线性种子并且沿着垂直方向结束到线性种子的中心。而且,multifractralspectra曲线变得更低并且奇特的范围更狭窄。线arseed的长度越长,模式变得越不不规则、不一致。
简介:—Effectivestressanalysisisperformedtoevaluatetheresidualdisplacementofacaissonquaywallduring1994Hokkaido-Toho-OkiEarthquakeand1993Kushiro-OkiEarthquake.Theconstitutivemodelusedinthisstudyisamultipleshearmechanismtypedefinedinstrainspaceandcantakeintoaccounttheeffectofrotationofprincipalstressaxis.Theearthquakeaccelerationsrecordedattheoutcroppingrockduringtheearthquakeareusedasinputbedrockmotion.Theresultsoffiniteele-mentanalysisareingoodagreementwiththeobservedbehaviourofthequaywall.Theanalysisalsoindi-catesthatliquefactionandhighexcessporewaterpressurehaveasignificanteffectonthedeformationofthecaisson.Soilimprovementisspeculatedasthemostreliablemeasuresagainstliquefaction.Theinflu-enceofsoilimprovementandthereasonableimprovedareaarediscussedinthepaper.
简介:ThispaperdiscussesthenonlinearstabilitybehaviourofdistortedplaneCouetteflowto2-dimensionaldisturbances,andcomparesitwiththatofdistortedplanePoiseuilleflow.TheresultsshowthatplaneCouetteflowismoreunstablethanplanePoiseuilleflowtofinite-amplitudedisturbances.
简介:张力爬精细的Fe-Mn二进制合金containing0.42-1.21wt.%Mn的行为从房间温度在温度范围被调查了到475Kunder10-50MPa。张力的测试以紧张率在uniaxail负担下面以经常的小标题速度被执行10(-4)s(-1)。压力代表和激活精力决心澄清变丑机制。稳定的状态的获得的变化爬关于为Fe-Mn二进制合金的应用压力的率在大约20MPa展出二不同政体,显示一个可能的变化在爬机制。平均压力代表是约2.2,它是在合金滑动的谷物boundry的一个特征。为塑料流动的激活精力从135~92kJ/mol变化,取决于Mn内容。
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简介:Renewableenergyisclearlyaveryimportanttopicnowadays.Theriskandthedamagethatcouldbecausedbyconventionalenergyresourcescannotbehidden.Thereisanenormousneedthatpeoplestartformulatingabetterattitudetowardsrenewableenergyandchangetheirconsumptionbehaviour.Otherwise,thefutureofenvironmentandthecominggenerationsaredefiantlynotgoingtobepromising.Thispaperdiscussestheimportanceofsustainableenergyandhowtheenergyrelatedbehaviouriscreated.Itpresentsaframeworktoinfluencethecurrentbehaviourandpushittobemoregreenoriented.Itisalsoimportanttoknowtillwhatlimitaregovernmentsresponsibleinthischange,andwhatarethetoolsthattheyhavetopushtowardsgreendirection.