简介：TheonlywayTerabytesofdatacanbeprocessedandanalyzedinareasonabletimeisbyusingparallelprocessingarchitectures.TheParalleROOTFacility,PROOF,isssystemfortheparallelinteractiveanalysisofsuchdatasetsonclustersofheterogeneouscomputers.EarlyprototypeshaveconfirmedthevalidityofthebasicPROOFarchitectureHowever,someimportantworkstillhastobedonebeforePROOFcanbeusedasaproductionfacility.Thebasicarchitectureandtheplanneddevelopmentsaredescribedinthispaper.

简介：Anoverviewoftheprogressonpulse-preserving,coherent,nonlinearfiber-basedsupercontinuumgenerationispresented.Thecontextencompassesvariouswavelengthrangesandpumpsources,startingwithsilicaphotoniccrystalfiberspumpedwith1.0μmfemtosecondlasersuptochalcogenidestep-indexandmicrostructuredfiberspumpedfromopticalparametricamplifierstunedtomid-infraredwavelengths.Inparticular,silicaandsilicatebasedall-normaldispersion(ANDi)photoniccrystalfibershavebeendemonstratedforpumpingwithfemtosecondlasersoperatingat1.56μmwiththerecordedspectracovering0.9–2.3μm.Thismatchesamplificationbandsofrobustfiberamplifiersandfemtosecondlasers.Thereviewthereforefocusesspecificallyonthiswavelengthrange,discussingglassandnonlinearfiberdesigns,experimentalresultsonsupercontinuumgenerationuptothefundamentallimitofoxideglassfibertransmissionaround2.8μm,andvariouslimitationsofsupercontinuumbandwidthandcoherence.Specifically,theroleofnonlinearresponseagainsttheroleofdispersionprofileshapeisanalyzedfortwodifferentsoftglassANDifiberspumpedatmorethan2.0μm.Aspatio-temporalinteractionofthefundamentalfibermodewithmodespropagatinginthephotoniclatticeofthediscussedANDifibersisshowntohavepositiveeffectsonthecoherenceofthesupercontinuumatpumppulsedurationsof400fs.Finally,thedesignanddevelopmentofgraded-index,nanostructuredcoreopticalfibersarediscussed.Insuchstructuresthearbitraryshapingofthecorerefractiveindexprofilecouldsignificantlyimprovetheengineeringflexibilityofdispersionandeffectivemodeareacharacteristics,andwouldbeaninterestingplatformtofurtherstudytheintermodalinteractionmechanismsandtheirimpactonsupercontinuumcoherenceforsubpicosecondlaserpumpedsetups.

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简介：Wereviewtherecenttheoreticalstudyontheopticalpropertiesofone-dimensionalsoftphotoniccrystals（1DSPCs）withferrofluids.Theproposedstructureiscomposedofalternatingferrofluidlayersanddielectriclayers.Fortheferrofluid,singledomainferromagneticnanoparticlescanaligntoachainunderthestimuliofanexternalmagneticfield,thuschangingthemicrostructureofthesystem.Meanwhile,nonlinearopticalresponsesinferrofluidsarealsobrieflyreviewed.

简介：Ininjectionmouldingproduction,thetuningoftheprocessparametersisachallengingjob,whichreliesheavilyontheexperienceofskilledoperators.Inthispaper,takingintoconsiderationoperatorassessmentduringmouldingtrials,anovelintelligentmodelforautomatedtuningofprocessparametersisproposed.Thisconsistsofcasebasedreasoning(CBR),empiricalmodel(EM),andfuzzylogic(FL)methods.CBRandEMareusedtoimitaterecallandintuitivethoughtsofskilledoperators,respectively,whileFLisadoptedtosimulatetheskilledoperatoroptimizationthoughts.First,CBRisusedtosetuptheinitialprocessparameters.IfCBRfails,EMisemployedtocalculatetheinitialparameters.Next,amouldingtrialisperformedusingtheinitialparameters.ThenFLisadoptedtooptimizetheseparametersandcorrectdefectsrepeatedlyuntilthemouldedpartisfoundtobesatisfactory.Basedontheabovemethodologies,intelligentsoftwarewasdevelopedandembeddedinthecontrollerofaninjectionmouldingmachine.Experimentalresultsshowthattheintelligentsoftwarecanbeeffectivelyusedinpracticalproduction,anditgreatlyreducesthedependenceontheexperienceoftheoperators.

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简介：In1929,AmericanastronomerHubblefirstdiscoveredthattherecessionalvelocityofagalaxyincreaseswithitsdistancefromtheearth,andthereforeputforwardHubble’slaw.ItisconsideredthefirstobservationalbasisfortheexpansionoftheuniverseandtodayservesasoneofthepiecesofevidencemostoftencitedinsupportoftheBigBangmodel.SincethentheastrophysicscommunityhasbelievedthattheuniverseisinaconstantrateofexpansionuntilSaulPermutter,BrianPaulSchmitandAdamGuyRieesdiscoveredtheacceleratingexpansionoftheuniversethroughobservationofseveraldozendistantsupernovasin1998,whothenwontheNobelPrizeinPhysics2011.Buthumanstillcannotcompletelyexplainthephenomenonthattheuniverseisexpandingatanever-acceleratingrate.Thustheauthorofthispaperstudiedtheoriginandevolutionofgalaxiesagain,andrevealedthestructureofgalaxyandprovedHubble’slaw,thenrevealedthetruthabouttheexpansionoftheuniverseaswellasdarkmatteranddarkenergy.

简介：Anextendedelectronmodelfullyrecoversmanyoftheexperimentalresultsofquantummechanicswhileitavoidsmanyofthepitfallsandremainsgenerallyfreeofparadoxes.TheformulationofthemanybodyelectronicproblemhereresemblestheKohnShamformulationofstandarddensityfunctionaltheory.However,ratherthanreferringelectronicpropertiestoalargesetofsingleelectronorbitals,theextendedelectronmodelusesonlymassdensityandfieldcomponents,leadingtoasubstantialincreaseincomputationalefficiency.Todate,theHohenberg-Kohntheoremshavenotbeenprovedforamodelofthistype,norhasauniversalenergyfunctionalbeenpresented.Inthispaper,weaddresstheseproblemsandshowthattheHohenbergKohntheoremsdoalsoholdforadensitymodelofthistype.Wethenpresentaproof^of^conceptpracticalimplementationofthismethodandshowthatitreproducestheaccuracyofmorewidelyusedmethodsonatest-setofsmallatomicsystems,thuspavingthewayforthedevelopmentoffast,efficientandaccuratecodesonthisbasis.

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简介：这篇论文论述一个多模式控制计划为一软开关回扫在全部负担上完成高效率和优秀负担规定的变换器变化。在重负担，有山谷切换的批评传导模式(CCMVS)被采用认识到以便象进行的电磁的干扰(EMI)一样减少刺激电源损耗开关的软切换。在轻负担，变换器与山谷切换和适应离开时间控制(AOT)限制切换的频率值域，频数值域和maintain负担规定在不连续的传导模式(DCM)操作。在极其轻的负担或在待机模式，爆炸模式操作被采用通过减少两个都切换的频率和控制器的静态的力量驱散提供低动力消耗量。多模式控制被其脉搏持续时间被产量反馈调整的一个振荡器实现。切换的控制电路保证力量的最小的刺激电压落下得到的一条精确山谷切换。控制器IC的原型在一个1.5-μmBiCMOS过程被制作并且适用于310V/20V，90W回扫DC/DC变换器电路。试验性的结果证明所有期望的功能成功地被认识到。flyback变换器完成了从完整的负担的超过80%的效率击倒到2.5W的高度，与到达88.8%的最大值，当在待机模式的总功率消费是大约300mW时。