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简介：Inordertoimprovetheperformanceofawellsturbinetheeffectofguidevaneswithvariousgapsbetweenturbinerotorandguidevanehasbeenclarifiedbymodeltestingandnumericalsimulation.Theresultshavebeencomparedwiththoseofthecasewithoutguidevanes,ItisfoundthattheoverallCharacteriticsareconsiderablyimprovedbytheinletguidevanes.Furthermore,asuitablechoiceofdesignfactorforthegaphasbeensuggested.

简介：Inthelightofφ-mappingmethodandtopologicalcurrenttheory,theeffectofdisclinationlinesonthefreeenergydensityofnematicliquidcrystalsisstudied.ItispointedoutthatthetotalFrankfreeenergydensitycanbedividedintotwoparts.Oneisthedistortedenergydensityofdirectorfieldaroundthedisclinationlines.Theotheristhesaddle-splayenergydensity,whichisshowntobecentralizedatthedisclinationlinesandtobetopologicallyquantizedintheunitofkπ/2whentheJacobiandeterminantofthedirectorfielddoesnotvanishatthesingularitiesofthedirectorfield.ThetopologicalquantumnumbersaredeterminedbytheHopfindicesandBrouwerdegreesofthedirectorfieldatthedisclinationlines,i.e.,thedisclinationstrengthes.WhentheJacobiandeterminantvanishes,thegeneration,annihilation,intersection,splittingandmergingprocessesofthesaddle-splayenergydensityaredetailedintheneighborhoodsofthelimitpointsandbifurcationpoints,respectively.Itisshownthatthedisclinationlinewithhightopologicalquantumnumberisunstableandwillevolvetothelowtopologicalquantumnumberstatesthroughthesplittingprocess.

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简介：在这份报纸，当精力特征值的空间与时间的模型，和表情被从量力学使用阶段振幅表示和基本想法导出，我们考虑二维的复杂Ginzburg四轮马车方程(CGLE)。由数字模拟，我们发现在CGLE系统的精力特征值能被划分成二部分，相应于螺线波浪和体积摆动。螺线波浪的精力特征值是确定的，它证明它表面地宣传；当螺线波浪的精力特征值是否定的时，哪个它里面地宣传的表演。为产生螺线波浪的精力特征值比体积摆动大的一个螺线波浪有一个必要条件。当它在CGLE系统的空间与更小的精力特征值与另一个波浪竞争时，有更大的精力特征值的一个波浪统治。在这研究的结束，一试验在波浪繁殖和精力传播之间的关系的讨论被给。

简介：Thezero-pointenergyofamesoscopicnonlinearinductance-capacitance(L-C)circuitisobtainedbymakinguseofthevariationmethod.Thisissomewhatlessthanthatofsimpleharmonicoscillator.

简介：通过相互作用精力坡度nanopore的聚合物链的translocation时间被蒙特卡罗模拟和佛克普朗克常数方程与双absorbing边界条件学习。模拟和计算为聚合物translocation揭示了三不同行为。这些行为能从在不同参数为聚合物translocation获得的免费精力的风景被解释品质上。结果证明通过nanopore的聚合物链的translocation时间能被合适设计相互作用精力坡度调节。

简介：Wereviewcurrentsiliconphotonicdevicesandtheirperformanceinconnectionwithenergyconsumption.Fourcriticalissuesareidentifiedtolowerenergyconsumptionindevicesandsystems:reducingtheinfluenceofthethermo-opticeffect,increasingthewall-plugefficiencyoflasersonsilicon,optimizingenergyperformanceofmodulators,andenhancingthesensitivityofphotodetectors.Majorconclusionsare(1)Mach–Zehnderinterferometer-baseddevicescanachieveathermalperformancewithoutanyextraenergyconsumptionwhilemicroringsdonothaveanefficientpassiveathermalsolution;(2)whiledirectbondedIII–V-basedSilaserscanmeetsystempowerrequirementfornow,hetero-epitaxialgrownIII–Vquantumdotlasersarecompetitiveandmaybeabetteroptionforthefuture;(3)resonantmodulators,especiallycouplingmodulators,arepromisingforlow-energyconsumptionoperationevenwhenthepowertostabilizetheiroperationisincluded;(4)benefitingfromhighsensitivityandlowcost,Ge/Siavalanchephotodiodeisthemostpromisingphotodetectorandcanbeusedtoeffectivelyreducetheopticallinkpowerbudget.Theseanalysesandsolutionswillcontributetofurtherloweringenergyconsumptiontomeetaggressiveenergydemandsinfuturesystems.

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简介：Recentresearchactivitiesrelevanttohighenergydensityphysics(HEDP)drivenbytheheavyionbeamattheInstituteofModernPhysics,ChineseAcademyofSciencesarepresented.RadiographyofstaticobjectswiththefastextractedhighenergycarbonionbeamfromtheCoolingStorageRingisdiscussed.Investigationofthelowenergyheavyionbeamandplasmainteractionisreported.WithHEDPresearchasoneofthemaingoals,theprojectHIAF(HighIntensityheavy-ionAcceleratorFacility),proposedbytheInstituteofModernPhysicsasthe12thfive-year-planofChina,isintroduced.

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简介：Anovelcharged-particlevelocityfilterforslowpositronbeamhasbeensuccessfullybuiltandtested.Itisapuremagneticsystemcomposedofthreemagneticfields,twoofthemarepuredipolemagneticfieldsgeneratedbytwosymmetricallyputcosinecoils.Thephysicalprincipleandtheperformanceofthecosinecoilsarereviewed.

简介：Inthecourseofimprovingand/ordesigninganenergysystem,eitherpurelyeconomiccriteria,althoughtheoverridingcriteria,orpurelyenergy-basedcriteria,althoughtheemphasizedcriteria,cannotseparatelyhandlereal-worldsituationsinasatisfactorymanner,Theeconmiceffectivenessandtheenergyefficiencymustbeconsideredsimultaneouslytodemonstratetheconfilictingandnon-commensurablecharacteristicsofthesemultiplecriteria.Aniterativeandinteractiveapproachtoformulatingandsolvingnon-linearmulti-criteriadecisionmakingproblemsfortheanalysisofanenergysystemisproposed.Itallowsthedecisionmaker(DM)tolearnfromtheavailableinformationanddymamicallychangehismind.Criterionfunctioinscanbetreatedasobjectivefunctions,asconstraintsofassomethinginbetweenbytheDM.Afteraseriesofiterationsandinteractiveprocedures,apreferredsolutioncanbemadeamongthenon-inferiorsetsconsideringthermodymamiccriteriaandeconomiccreteriasimultaneously,asimpleexamplefordesignofahestexchangerisusedtoillustratetheprocedure.

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简介：把温度分发用作一个外部参数改变对称并且在铝测量声学的回声的频率光谱堵住，我们在混乱台球调查精力层次的统计和动力学。精确地提取回声并且消除噪音的影响，为泛音倒置的一个filter-diagonalization方法被用来为低数量因素回声系统克服常规快Fourier变换方法的低分辨率。我们在场一改善并且试验性地学习量系统的混乱特征的可行模拟方法。

简介：TheGroupofEnergyMaterials(GEM)inIMPisengagedintheirradiationresponseofmaterialscandidatetoadvancednuclearenergysystems(GenIV,fusionreactors).Themajorprogressofresearchinourgroupin2016isintheirradiationhardening/embrittlementofoxide-dispersion-strengthened(ODS)ferriticsteelsandVanadiumalloys,andinthemechanismsunderlyingdamageproductioninsiliconcarbide(SiC)fibers.Abriefdescriptionisgivenasfollows.1.EffectoftheoxidenanoparticlesontheirradiationhardeningofODSferriticsteelsTheinfluenceofoxidenanoparticlesontheirradiationresistanceofODSferriticsteelsisacrucialissuefortheupgradeofODSsteels.

简介：Thesymmetryenergy,whichgovernsmanyphysicalphenomenafromthestructureofexoticnucleitoastrophysicalprocesses,hasmanyramificationsinbothnuclearphysicsandastrophysics.Althoughnuclearsymmetryenergyanditsslopeatthenormaldensityofnuclearmatterhavebeenroughlypinneddown,recentinterpretationsofFOPIandFOPI-LANDdatabydifferenttransportmodelsleadtodivergentconclusionsonthedensity-dependentsymmetryenergyatsupradensities.

简介：Thispaperreviewsthedifferentchallengesthatareencounteredinthedeliveryofhighpowerlasersasdriversforfusionenergy.Wewillfocusondiode-pumpedsolid-statelasersandwewillhighlightsomeofthemainrecentachievementswhenusingytterbium,cryogeniccoolingandceramicgainmedia.Apartfromsomeexistingfusionfacilitiesandsomemilitaryapplicationsofdiode-pumpedsolid-statelasers,wewillshowthatdiode-pumpedsolid-statelasersarescalabletoinertialfusionenergy(IFE)’sfacilitylevelandthattheall-fiberlaserschemeisverypromising.