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简介：我们建议被用来在single-j壳的Hamiltonian决定联合参数C的一个修改公式。与以前已知的公式比较，新公式改进在入侵者single-j层次和尼尔逊之间的协议。为在粒子转子模型以内的chiral乐队的研究，新联合参数将更加影响在马甲乐队之间切开的精力。

简介：Electricaldischargemachining(EDM)process,atpresentisstillanexperienceprocess,whereinselectedparametersareoftenfarfromtheoptimum,andatthesametimeselectingoptimizationparametersiscostlyandtimeconsuming.Inthispaper,artificialneuralnetwork(ANN)andgeneticalgorithm(GA)areusedtogethertoestablishtheparameteroptimizationmodel.AnANNmodelwhichadaptsLevenberg-Marquardtalgorithmhasbeensetuptorepresenttherelationshipbetweenmaterialremovalrate(MRR)andinputparameters,andGAisusedtooptimizeparameters,sothatoptimizationresultsareobtained.Themodelisshowntobeeffective,andMRRisimprovedusingoptimizedmachiningparameters.

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简介：我们与一个悦耳的攻击信息参数为建筑群的坚韧性介绍一个新奇模型。知道的随机的失败和故意的攻击是我们的模型的二种极端情况。基于模型，我们分别地在随机的信息和优先的信息下面学习复杂网络的坚韧性。用产生函数方法，我们为网络的崩溃和巨大的部件的尺寸导出节点的批评移动部分的准确的值。我们证明随机隐藏就节点的小部分能阻止一个没有规模的网络折叠并且检测就节点preferentiallycan破坏的小部分一个没有规模的网络。

简介：Theaimofthisresearchistocharacterizethedevelopmentoffatiguedamagebymeansofstress-strainhysteresis.Experimentswereconductedon14specimensmadeofcold-finishedunannealedAISI1018steel.Resultsdemonstratethatthemechanicalhysteresisloopareas,whenplottedasafunctionofthenumberofloadingcycles,showsignificantvariationsanddemonstratethethreeprincipalstagesconcerningtheprogressofthefatiguefailure—initialaccommodation,accretionofdamageandterminalfailure.ThesethreestagesoffatiguearemarkedbythetransitionsatcyclesN2andN3.ExperimentalresultsshowthatalthoughfatiguelifeNfrangesfrom2644cyclesto108992cycles,theratiosofN2/NfandN3/Nftendtobestable:N2/Nf=10.7%,N3/Nf=91.3%.

简介：Spatialcoherenceresonanceinatwo-dimensionalneuronalnetworkinducedbyadditiveGaussiancolourednoiseandparameterdiversityisstudied.WefocusontheabilityofadditiveGaussiancolourednoiseandparameterdiversitytoextractaparticularspatialfrequency(wavenumber)ofexcitatorywavesintheexcitablemediumofthisnetwork.Weshowthatthereexistsanintermediatenoiselevelofthecolourednoiseandaparticularvalueofdiversity,whereacharacteristicspatialfrequencyofthesystemcomesforth.Hereby,itisverifiedthatspatialcoherenceresonanceoccursinthestudiedmodel.Furthermore,weshowthattheoptimalnoiseintensityforspatialcoherenceresonancedecaysexponentiallywithrespecttothenoisecorrelationtime.Someexplanationsoftheobservednonlinearphenomenaarealsopresented.

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简介：在黑色基于Blandford-Znajek和磁性的联合进程的共存洞(BH)生长圆盘，为喷气力量的一个多参数模型和活跃星群的原子核(AGN)的收音机大声被学习。结果，AGN的收音机大声能被五个参数管理：(ⅰ)BH旋转，(ⅱ)变化的一个幂定律索引磁性在圆盘上删除；(ⅲ)决定圆盘的内部边的位置的一个参数，(ⅳ)到生长流动的最深处的部分的公羊压力的领带地平线上的磁场的压力的比率，并且(ⅴ)到地平线的户外Reldlines的尖速度的比率。观察两分在之间收音机大声并且收音机安静AGN被上述参数的效果很好解释。而且，我们独立关于每个参数讨论AGN的收音机大声的衍生物。另外，AGN的收音机大声上的螺丝钉不稳定性的效果被讨论。

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简介：Ｅｍｉｓｓｉｏｎ　Ｔｅｍｐｅｒａｔｕｒｅｓ　ｆｒｏｍ　Ｐｏｐｕｌａｔｉｏｎｓ　ｏｆ　Ｐａｒｔｉｃｌｅ　Ｕｎｓｔａｂｌｅ　Ｓｔａｔｅｓ　ａｓ　ａ　Ｆｕｎｃｔｉｏｎ　ｏｆ　Ｉｍｐａｃｔ　ＰａｒａｍｅｔｅｒＥｍｉｓｓｉｏｎＴｅｍｐｅｒａｔｕｒｅｓｆｒｏｍＰ...

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简介：AnewmethodisproposedtocalculatetheGrüneisenparameterdirectlyfromtheexperimentalHugoniotdata,withoutanyassumptiononthelatticevibrationalmodeofthematerialbeingstudied.Comparedwiththeresultscalculatedbythemethodsproposedpreviously,thevaluesoftheGrüneisenparametercalculatedhavethreedistinguishablefeaturesthatsupporttherationalityofthemethod.Anewphenomenonthatthelatticevibrationalmodechangeswiththethermodynamicstateofthesolidhasbeenfirstobservedfromthecalculatedresults,whichimpliesthatthematerialparameterg,characterizingthelatticevibrationalmode,ismaterialdependentratherthanamaterialconstant.

简介：WefallintodisusetheJUHUsystembasedonthePDP/11computerforRSX11Moperationsystem,andupdateourmulti-parameterdataaequisitionandanalysissystem’shardwareandsoftwarebasedonVAXIIcomputerandOpenVMSoperationsystem,makeitadaptedtotherecentphysicsexperiment.Inthispaper,wedescribetheupdatedinulti-parameterdataacquisitionandanalysissystem’shardware,softwareconfigurationandsystemfunction.

简介：Gas-liquidcouplingoscillationisanovelapproachtoreducingtheresonantfrequencyandtoelevatingthepressureamplitudeofathermoacousticengine.Ifathermoacousticengineisusedtodrivelow-frequencypulsetuberefrigerators,thefrequencymatchingbetweenthethermoacousticengineandtherefrigeratorplaysanimportantrole.Basedonanacoustic-electricanalogy,alumpedparametermodelisproposedtoestimatetheresonantfrequencyofastanding-wavethermoacousticenginewithgas-liquidcouplingoscillation.Furthermore,asimplifiedlumpedparametermodelisalsodevelopedtoreducethecomputationcomplexity.Theresonantfrequencydependenceonthemeanpressure,thegasspacevolume,andthewatercolumnlengthiscomputedandanalyzed.Theimpactofdifferentworkinggasesontheresonantfrequencyisalsodiscussed.Theeffectivenessofthemodelsisvalidatedbycomparingthecomputedresultswiththeexperimentaldataofthegas-liquidcouplingoscillationsystem.Anincreaseinthemeanworkingpressurecanleadtoariseintheresonantfrequency,andalowerresonantfrequencycanbeachievedbyelongatingtheliquidcolumn.Incomparisonwithnitrogenandargon,carbondioxidecanrealizealowerfrequencyduetoasmallerspecificheatratio.

简介：这研究是为冷却高温度汽轮机翼和片的先进调查。在片的表面附近交换的有效的热可以被强迫从在结构的高力量金属上被粘贴的多孔的金属的薄层射出的冷却空气流动完成。内容通过多孔的材料，具体建模和模型，的分析的层在热转移的计算模型上包括考虑为二层的多孔的材料和热转移的关键参数的数字调查通过模型隧道的液体流动。结果表明构造系统是合理的。为多孔的材料热转移效率建议了一个评估公式。

简介：A3DfiniteelementmodelfortheTaizhouYangtzeRiverBridge,thefirsttriple-towerlong-spansuspensionbridgeinChina,isestablishedbasedonthenonlinearfiniteelementsoftwareABAQUS,andthedynamiccharacteristicsofthebridgeareanalyzedusingtheLANCZOSeigenvaluesolutionmethod.Thestudyfocusesontheeffectsofthevertical,lateralandtorsionalstiffnessofthesteelboxgirder,therigidcentralbuckleandtheelasticrestraintsconnectingthetowersandthesteelboxgirderonthedynamiccharacteristicsofthetriple-towersuspensionbridge.Ourresultsshowthat,ingeneral,thedynamiccharacteristicsofthetriple-towersuspensionbridgearesimilartothoseoftwo-towersuspensionbridges.Thevertical,lateralandtorsionalstiffnessofthesteelboxgirderhavedifferenteffectsonthedynamiccharacteristicsoftriple-towersuspensionbridges.Theelasticre-straintshaveamoresignificanteffectonthedynamiccharacteristicsthanthecentralbuckle,anddecreasingthestiffnessoftheelasticrestraintsresultsintheappearanceofalongitudinalfloatingvibrationmodeofthebridge.Also,rigidcentralbuckleshaveagreaterinfluenceonthedynamiccharacteristicsoftriple-towersuspensionbridgesthanonthoseoftwo-towersuspensionbridges.Theresultsobtainedcouldserveasavaluablenumericalreferenceforanalyzinganddesigningsuper-long-spantriple-towersuspensionbridges.

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