简介：Handlingindustrialpowdersleadstodustemissions.Theseemissionstendtogeneratehumandiseasesorcauseotherenvironmentaleffects.Amultitudeofapparatushasbeendevelopedtoestimatethisdustinessbehaviourofpowders.Twoofthesewell-knownmethodsarepresentedandcomparedwitheachother.Athirdrecentlydevelopedmethodisalsointroduced.

简介：Thedeterminationofstructuraldynamicstressspectrumdistributionisofgreatsignificanceinthestructuralfatiguestrengthevaluationaswellasreliabilitydesign.Inpreviousempiricaldataprocessingmethods,thedatagroupinganddistributionfittingwereexcessivelycoarseandcontaineddistinctivedefects.Thispaperproposedaneffectiveapproachtostatisticallygroupactualmeasureddynamicstressdataandvalidlyextrapolatethecombineddistributiontofitthedynamicstressspectrumdistribution.Thisapproachhasbeenverifieditseffectivenessthroughchi-squaretest,stressspectrumextrapolationanddamagecalculationindynamicstressstudy.

简介：为灵活multibody系统的模拟的一个重要问题是自由的灵活身体度的减小。根据安全问题被担心，自由的灵活的度的减小介绍的错误的知识有用、很重要。

简介：Inoffshoreengineeringdesign,itisconsiderablysignificanttohaveanadequatelyaccurateestimationofmarineenvironmentalparameters,inparticular,theextremewindspeedoftropicalcyclone(TC)withdifferentreturnperiodstoguaranteethesafetyinprojectedoperatinglifeperiod.Basedonthe71-year(1945–2015)TCdataintheNorthwestPacific(NWP)bytheJointTyphoonWarningCenter(JTWC)ofUS,anotablegrowthoftheTCintensityisobservedinthecontextofclimatechange.Thefactimpliesthatthetraditionalstationarymodelmightbeincapableofpredictingparametersintheextremeevents.Therefore,anon-stationarymodelisproposedinthisstudytoestimateextremewindspeedintheSouthChinaSea(SCS)andNWP.Wefindthattheextremewindspeedsofdifferentreturnperiodsexhibitanevidentenhancementtrend,forinstance,theextremewindspeedswithdifferentreturnperiodsbynonstationarymodelare4.1%–4.4%higherthanstationaryonesinSCS.Also,thespatialdistributionofextremewindspeedinNWPhasbeenexaminedwiththesamemethodologybydividingthewestseaareasoftheNWP0°–45°N,105°E–130°Einto45subareasof5°×5°,whereoilandgasresourcesareabundant.Similarly,remarkablespacialin-homogeneityintheextremewindspeedisseeninthisarea:theextremewindspeedwith50-yearreturnperiodinthesubarea(15°N–20°N,115°E–120°E)ofZhongshaandDongshaIslandsis73.8m/s,whilethatinthesubareaofYellowSea(30°N–35°N,120°E–125°E)isonly47.1m/s.Asaresult,thepresentstudydemonstratesthatnon-stationaryandin-homogeneouseffectsshouldbetakenintoconsiderationintheestimationofextremewindspeed.

简介：ThestabilitydegreeofperiodicsolutionofnonlinearnonautonomoussystemwasdefinedbymeansoftheFloquettheory.Amethodevaluatingthestabilitydegreeofperiodicsolutionbasedontransientresponsewaspresentedbytheaidoftheconceptofdynamicsystemsorflows.Thecriticalvalueofasystemwasdeterminedbythecondition,i.e.,itsstabilitydegreeequalszero.Stableregionsofrotorsystemswithbalancedandunbalanceddisksupportedonlubricatedbearingswerecalculated.Thestudyshowsthatstableregiondecreaseswiththeincreaseofspeedforabalancedrotorsystemanddecreaseswiththeincreaseofunbalanceforanunbalancedrotorsystem.Stableregionsofperiodicsolutionsarelessthanthatofequilibriumpointsunderthesamesystematicconditions.

简介：Anapproximatemethodfordescribingtheplastichardening-softeningbehaviourofcircularpipessubjectedtopurebendingispresented.Theo-reticalestimationbasedontheuniformovalizationmodelandlocalcollapsemodelproposedinthepaperisincorporatedtogiveseveralsimpleformulationswithrea-sonableaccuracyfordeterminingtherelationshipbetweenbendingmoment(M)andcurvature(k)inthepurelybendedpipes.Attentionisfocusedonthecriticalcur-vatureassociatedwithmaximumresistantmomentandthemaximumchangeintheoriginaldiameterbeforetheendofuniformovalizationstageaswellasthelocalcollapsebehaviour.Somecomparisonsbetweenanalyticalresultsandexperimentalresultsaremadeinordertoexaminethetheory.

简介：纸由使用biomagnetic液体动力学(BFD)的原则通过一个多孔的中等题目处理biomagnetic液体流动的一个基本问题的理论调查到一个磁场。学习与液体的磁化与温度变化的一种状况相关。液体被认为非牛顿，其流动被一个二年级的方程管理粘弹性的液体。隧道的墙被假定可拉长，在表面速度与从坐标的起源的纵的距离成正比的地方。这个问题首先被归结为解决包含七个参数的联合非线性的微分方程的一个系统。把血看作biomagnetic液体并且使用现在的分析，被尝试由开发一个合适的数字方法并且由设计一个适当有限差别计划计算血流动的一些参数。计算结果在图形的形式被介绍，并且从而，一些理论预言在一个磁场的行动下面处于一个过高热的状态关于血的hemodynamical流动被做。结果清楚地显示磁性的偶极子的存在忍受潜力以便在电磁的过高热的治疗学的过程期间在动脉影响血流动的特征到重要程度。学习将吸引临床医生，结果将在由电磁的过高热的方法的癌症病人的治疗是谁有用的注意。

简介：Theauthorsinvestigateadisturbance-compensatingandenergy-savingcontrolmethodforairturbinespindlesequippedwitharotationcontrolsystemdesignedforuseinultra-precisionmilling.Thecontrollabilityandenergy-conservingcharacteristicsoftheproposedmethodusingtheproposedpneumaticregulatingdevice,calledahigh-precisionquick-responsepneumaticpressureregulator,weredemonstratedexperimentallypreviously.Herein,theproposedrotation-controlledairturbinespindleisfirstsummarised.Subsequently,theproposedrotation-controlledairturbinespindleissettoamillingmachineandappliedtothemillingofanalloytoolsteel,togaindataandvalidatetheeffectivenessofthein-processtoolwearestimationmethodthathavebeenrecentlydevelopedandproposedbytheauthors.Particularly,toevaluatethepossibilityofapplyingtheproposedestimationmethodtothree-dimensionalmilling,millingexperimentswheretheairturbinespindleissetata45°inclinewereconductedandtheresultsindicateahighpossibilityoftheproposedmethod.

简介：Theauthorsinvestigateadisturbance-compensatingandenergy-savingcontrolmethodforairturbinespindlesequippedwitharotationcontrolsystemdesignedforuseinultra-precisionmilling.Thecontrollabilityandenergy-conservingcharacteristicsoftheproposedmethodusingtheproposedpneumaticregulatingdevice,calledahigh-precisionquick-responsepneumaticpressureregulator,weredemonstratedexperimentallypreviously.Herein,theproposedrotation-controlledairturbinespindleisfirstsummarised.Subsequently,theproposedrotation-controlledairturbinespindleissettoamillingmachineandappliedtothemillingofanalloytoolsteel,togaindataandvalidatetheeffectivenessofthein-processtoolwearestimationmethodthathavebeenrecentlydevelopedandproposedbytheauthors.Particularly,toevaluatethepossibilityofapplyingtheproposedestimationmethodtothree-dimensionalmilling,millingexperimentswheretheairturbinespindleissetata45°inclinewereconductedandtheresultsindicateahighpossibilityoftheproposedmethod.