简介：

简介：自相关函数并且有非线性的推迟时间的反馈的一个自治随机的系统跨关联被使用随机的模拟方法调查。在一个自治随机的系统的关联上二次的推迟时间的反馈和立方的推迟时间的反馈的角色之间有突出的差别。在二次的推迟时间的反馈下面，非线性的时间延期没能改进自治随机的系统的吵闹的状态，自相关单调地减少到零，并且跨关联的增加单调地到零与腐烂时间。在立方的推迟时间的反馈下面，非线性的时间延期能改进自治随机的系统的吵闹的状态；自相关和跨关联的表演期刊摆动和变细，最后与腐烂时间趋于到零。比较系统在之间的关联与非线性的推迟时间的反馈和线性推迟时间的反馈，我们发现非线性的推迟时间的反馈降低自治随机的系统的关联力量。

简介：我们分析磁电机尾巴水流表的垂直结构为两次间隔在哪个期间簇太空船在一安静时间穿过中立的表。Inthe间隔，慢慢地移动的当前的表，和AE的价值索引是相对小的，关于40-130nT。我们发现当前的表的二个例子，与在磁性的赤道的当前的密度最大值(B-x=0)，以及离开中心的一个例子或区分的电流表。在安静时间，没有任何快血浆流动并且没有重要flapping运动，我们直接也观察了区分的当前的表。区分的当前的表可能在当前的表在稳定性以内被联系。这些可能为研究当前的表分叉的机制是重要的。

简介：

简介：Improvementonextinctionandpollutionemissionhavebecomeoneofthemostprominentresearchtopicsingasturbine.Itiswidelyrecognizedthatthefuel/airmixturedistributionintherecirculationzoneisacriticalfactorinimprovingleanblow-out(LBO)andignition.Thispaperproposedanewlowemissionschemewithfuelstagedcentrallyandhybridinjectortoimproveflameoutandemission.Arelativesmallamountoffuelentersintocentralpilotairblastatomizerburnerandthenatomizedbyinnerswirlair.Theremainingmajorityoffuelisdirectlyinjectedintovanechannelsoftheprimaryswirlerthroughaseriesofholeslocatedonthesidewallofthemainstage.Onlypilotstageisfueledunderignitionandleanflameoutcondition.Theuniformityoffuel/airmixturedistributionintheprimaryzoneofthenewdesigndecreasesNOXemission,meanwhilethefuelairmixtureinpilotrecirculationzoneislocallyrichtoimproveflameoutandignition.Experimentalinvestigationwasconductedtocomparethenewschemewithbaselinedesignofdual-swirlerintermsofLBOandignitioncharacteristicsunderthesameconditioninamulti-sectorcombustor.Itisfoundthatthefuel-airratioofignitionlimitandLBOdecreasewiththereferencevelocityincreasing.Theexperimentalresultsalsoshowthatthenewschemesuccessfullyimproveleanblow-outandbroadentheoperationrangeofthecombustor.Theexperimentalresultsindicatedthatthecentrallystagedschemecanwidentheoperationboundaryofthecombustorandcanprovideguidancefordesignandoptimizationofcombustionchamber.

简介：Inthispaper,weconsiderthestationaryprobabilityandfirst-passagetimeofbiasedrandomwalkon1Dchain,whereateachstepthewalkermovestotheleftandrightwithprobabilitiespandqrespectively(0p,q1,p+q=1).Wederiveexactanalyticalresultsforthestationaryprobabilityandfirst-passagetimeasafunctionofpandqforthefirsttime.Ourresultssuggestthatthefirst-passagetimeshowsadoublepower-lawF~(N-1)~γ,wheretheexponentγ=2forN<|p-q|~(-1)andγ=1forN>|p-q|~(-1).Ourstudyshedsusefulinsightsintothebiasedrandom-walkprocess.

简介：Thestationarycorrelationfunctionandtheassociatedrelaxationtimeforageneralsystemdrivenbycrosscorrelatedwhitenoisesarederived,byvirtueofaStratonovich-likeansatz.Theeffectsofcorrelatednoisesontherelaxationtimeofabistablekineticmodelcoupledtoanadditiveandamultiplicativewhitenoisesarestudied.ItisprovedthatforsmallfluctuationstherelaxationtimeTcasafunctionofλ(thecorrelatedintensitybetweennoises)exhibitsverydifferentbehavioursforαD(αandD,respectively,standfortheintensitiesofadditiveandmultiplicativenoises).Whenα>D,Tcincreaseswithincreasingλ.Butwhenα

简介：

简介：Theuniaxialratchetingbehaviorofapolyetherimide(PEI)polymer'TECAPEI'wasstudiedusingstress-controlledcyclicloadingatroomtemperature,includingbothcyclictension-compressionwithnon-zerotensilemeanstressandtension-unloadingtests.Theexperimentalobservationswerefocusedonthetime-dependentratchetingofthePEIpolymerrevealedincyclictestsatdiversestressratesandwithdifferentpeakstressholdingtimes.TheresultsshowedthatthePEIpolymershowsobviousratchetingdeformation;i.e.,theratchetingstrainaccumulatesprogressivelyinthetensiledirectionduringstress-controlledcyclictestswithnon-zeromeanstress.Theratchetingishighlydependentontheappliedmeanstressandstressam-plitude,andisalsocharacterizedbyastrongtime-dependencyduringthecyclicstressingatdiversestressratesandwithdifferentpeakstressholdingtimes.Thetime-dependentratchetingofthePEIpolymeriscausedmainlybyitsremarkableviscosity.AcomparisonoftheratchetingoccurringbeforeandbeyondtheultimatestresspointofthePEIpolymershowedthattheratchetingbeyondtheultimatestresspointismoresignificantthanthatoccurringbeforethatpoint.

简介：在氧化的缺氧的硫化物(ASO)的最佳的操作条件生物反应器被调查。最大的移动为硫化物评价；硝酸盐被发现是4.18kg/(m[3]·d)；1.73kg/(m[3]·d)分别地。装载在固定底层集中整个减少的水力的保留时间(HRT)观察的率(LR)的volumetricalvolumetri比由在固定HRT增加底层集中的那些高。在ASO反应堆的硫化物氧化部分正在生产两硫酸盐；硫；但是生产的硫酸盐的数量是约三分之一硫的。这个过程能高容忍硫化物集中，当流入的集中直到580mg/L时，硫化物移动百分比总是在99%附近留下了。它容忍了因为当流入的集中在110mg/L上面被增加时，移动百分比落下到85%，相对降低硝酸盐集中。这个过程能容忍更短的HRT但是小心的操作被需要。自从当HRT从3.12h被减少到2.88h时，进程性能突然地败坏了，硝酸盐变换比硫化物变换对HRT更敏感。以便在反应堆避免亚硝酸根累积，流入的硫化物；硝酸盐集中应该在280mg/L被保留；67.5mg/L分别地。现在的生物工学为把硫化物从下水道移开是有用的；原油。

简介：Itisknownthatthereisalagtimeforsmokeplumeinducedbyfirestransportingfromafireorigintothelocationofinterestunderneathanunconfinedandflatceiling.Thislagbehaviorofsmokeplumealsoexistsforafireunderaslopedceiling,andisfundamentaltoestimatetheactivationtimeofafiredetectororotherfireextinguishingsystem.Thisstudyfocusesonthelagtimeofsmokeplumeunderaslopedceiling.Basedontheweak-plumetheoryatearly-firephaseandpreviousstudiesconcerningthefireplumecharacteristicsunderaslopedceiling,acalculationmethodonlagtimeoffireplumetransportingispresentedintheory.Meanwhile,twodimensionlessequationspredictingthelagtimeoffireplumeforsteadyfireandunsteadyfireareproposedrespectively.Furthermore,thecriticaltimecalculationequationisalsoproposedtodeterminetheapplicabilityofquasi-steadyassumptionforatime-dependentfire.

简介：Ｉｎ－ｐｌａｎｅａｎｄＯｕｔ－ｏｆ－ｐｌａｎｅＥｍｉｓｓｉｏｎｏｆＵｎｓｔａｂｌｅＮｕｃｌｅｉｆｒｏｍ４０Ａｒ＋１９７ＡｕＲｅａｃｔｉｏｎＳｙｓｔｅｍ￥ＨｅＺｈｉｙｏｎｇ；ＤｕａｎＬｉｍｉｎ；ＬｉＺｕｙｕ；ＪｉｎＧｅｎｍｉ...

简介：

简介：非相对论的量力学的明白地计量器不变的明确的表达在磁性的偶极子近似被用于时间依赖者泛音振荡器的盒子。为获得计量器不变的转变概率振幅的一个一般方程被导出。

简介：

简介：Wehaveoptimizedtheinputpulsewidthandinjectiontimetoachievethehighestpossibleoutputpulseenergyinadouble-passlaseramplifierusingtwoNd:YAGrods.Forthispurpose,wehaveextendedtheFrantz–Nodvikequationbysimultaneouslyincludingbothspontaneousemissionandpumpenergyvariation.Theeffectivepumpenergyoftheflashlampwas8.84Jforeachgainmedium.Theenergyof1Jcouldbeamplifiedtoanoutputenergyof12.17Jwiththemaximumachievedextractionefficiencyof63.18%whenaninputpulsehavingapulsewidthof168μsissent10μsaftertheabsorbedpumpenergybecomesthemaximumvalue.

简介：Wedemonstrateexperimentallyaradiofrequencyarbitrarywaveformgeneratorusingtheincoherentwavelengthto-timemappingtechnique.Thesystemisimplementedbyamplitudemodulationofabroadbandopticalresourcewhosespectrumisreshapedbyaprogrammableopticalpulseshaperandtransmittedoverasinglemodefiberlink.Theshapeofthegeneratedwaveformiscontrolledbytheopticalpulseshaper,andthefiberlinkintroducesacertaingroupvelocitydelaytoimplementwavelength-to-timemapping.Assistedbytheflexibleopticalpulseshaper,weobtaindifferentshapesofopticalwaveforms,suchasrectangle,triangle,andsawtoothwaveforms.Furthermore,wealsodemonstrateultra-widebandgeneration,suchasGaussianmonocycle,doublet,andtripletwaveforms,usingtheincoherenttechnique.

简介：时间的不平等的一种新类型被讨论，它适用于算法的进程，包含处理联合起来的有限记忆。他们是Leggett-Grag，以及到由Brukner等的修改的一种选择。如果一个人考虑包含有限存储器的系统的量和古典进程的比较(在两个盒子中的一样的能力)，不平等给我们能期望量加速的一条清楚的消息。在古典进程，一个人清楚地总是定义可能的大小的值，或以信息处理语言如果我们有一取决于到达各个的数据的某功能的顺序的计算走在一个算法上，函数总是有清楚地定义的值。在算法的结束以后，在量盒子中，仅仅最后的价值被定义。与Bohrs补充一致，所有中间的价值不能被归功于明确的价值。

简介：Ｅｍｉｓｓｉｏｎ　Ｔｉｍｅ　ｏｆ　Ｌｉｇｈｔ　Ｐａｒｔｉｃｌｅｓ　ａｎｄ　Ｌｉｆｅｔｉｍｅ　ｏｆ　Ｈｏｔ　Ｎｕｃｌｅｉ　Ｆｏｌｌｏｗｉｎｇ　Ｂｉｎａｒｙ　ＦｉｓｓｉｏｎＥｍｉｓｓｉｏｎＴｉｍｅｏｆＬｉｇｈｔＰａｒｔｉｃｌｅｓａｎｄＬｉｆｅｔｉｍｅｏｆ...

简介：IntheresearchofusingRadialBasisFunctionNeuralNetwork(RBFNN)forecastingnonlineartimeseries,weinvestigatehowthedifferentclusteringsaffecttheprocessoflearningandforecasting.Wefindthatk-meansclusteringisverysuitable.Inordertoincreasetheprecisionweintroduceanonlinearfeedbacktermtoescapefromthelocalminimaofenergy,thenweusethemodeltoforecastthenonlineartimeserieswhichareproducedbyMackey-Glassequationandstocks.Byselectingthek-meansclusteringandthesuitablefeedbackterm,muchbetterforecastingresultsareobtained.