简介：afterdesignresearchhastworoles,influencingtheconceptgenerationprocessandtheapplicationoftheconceptonthesite.Fivemodelsemergedforusingresearchduringdesign,Astudywasundertakentoexploretheincorporationofresearchintothelandscapearchitecturaldesignprocess.Areviewoftheliteraturerevealedfivediscretemodelsbywhichresearchisintegratedintodesign

简介：Plasmonicwaveguides,asacompetitivecandidate,havebeenwidelystudiedinrapiddevelopingphotonicintegratedcircuits(PICs)andopticalinterconnectionfields.However,crosstalkbetweenplasmonicwaveguidesisacriticalissuethathastobeconsideredinpractice.Actually,crosstalkdominatestheultimateintegrationdensityoftheplanarphotoniccircuits.Thispaperreviewstherecentresearchworkonevaluationmethodsandcrosstalksuppressionapproachesofplasmonicwaveguides.Threecrosstalkevaluationmethodsbasedoncomparisonofspecificparametersofwaveguideshavebeensummarized.Furthermore,fourspecificapproachestoreducecrosstalkhavebeenillustratedastwocategoriesaccordingtotheirimpactsonwaveguideperformancesandthewholecircuit.Onemeansofcrosstalksuppressionischangingtheplacementofwaveguides,whichcouldmaintainthetransmissioncharacteristicsoftheoriginalwaveguide.Theothermeansisinsertingmedium,whichhastheadvantageofoccupyingsmallerspacecomparedtothefirstmethod.Consequently,tosuppresscrosstalkbetweenplasmonicwaveguides,oneshouldchoosesuitableapproach.

简介：ResearchersatStockholmUniversityhavedevelopedamethodtomultiplythelifespanofnickel-metalhydridebatteries.Thismeansthatthebatteriescanhandleagreatmanymorechargingcycleswithoutlosingcapacity.Thenewmethodalsomeansthatthebatteriescaneasilyberestoredoncetheyhavebeguntowearout,unlikeotherrechargeablebatteriesthatmustbemelteddownforrecycling.

简介：宰予字子我,字子周,曾参字子舆、例5

简介：TheenergyradiationprocessofanairgunseismicsourceinlandreservoirisstudiedbasedontheunderwaterwaveletdatacollectedintheairgunexcitationexperimentsinBinchuan,Yunnan,China.Theempiricalformulaforcalculatingthebubblepulsationperiodandthemaximumradiusoftheunderwaterairgunseismicsourceisobtained.Theresultsshowthat:①Theenergyradiationefficiencyishigherverticallythanhorizontally.②Theverticalbubbleenergyradiationefficiencyincreaseswiththeincreaseoftheairsupplypressure.③Theverticalenergyradiationefficiencyoftheairgunseismicsourceis9.4%whentheairsupplypressureis15MPa.④Thehighertheairsupplypressure,thefurtherthepropagatingdistanceofthesuperposition-enhancedpressurewaveofanairgunsource.

简介：Thisstudyinvestigatestheeffectivenessofthenon-smoothsemi-activecontrolalgorithmonsuppressingthevibrationperformanceofabuildingstructuresubjectedtoseismicwaves.AccordingtotheLyapunovstabilitytheory,ithasbeneproventhatthenon-smoothsemi-activecontrolalgorithmcanachieveafinite-timestabilityofthevibrationrelativetotheisolationlayerofabuildingstructure.Throughnumericalsimulationoftwobuildingswithdifferentparameterssubjectedtotheinputofaseismicwave,thevibrationconditionsofpassivecontrol,LQRsemi-activecontrolandnon-smoothsemiactivecontrolarecomparedandanalyzed.Thesimulationresultsshowthatthenon-smoothsemi-activecontrolalgorithmhasabetterrobustnessandeffectivenessinrestrainingtheimpactofearthquakesonthestructure.

简介：Mostfluidflowsinnatureandengineeringapplicationsareinthestateofturbulence.Turbulentmotionsusuallyexhibitawiderangeofspatialandtemporalscales,suchastheflowofnaturalgasandoilinpipelines,thewakesofcarsandsubmarines,theboundarylayerofanaircraft,thecurrentintheoceansurface,theatmosphericboundarylayer,theinterstellargasclouds(gaseousstars),andtheEarth’swakeinthesolarwind.Turbulencecangreatlyimprovetheheatandmasstransferefficiencyofmacroscopicflow.Forexample,chemicalengineersuseturbulencetomixupandhomogenizefluidcomponentsandtoincreasechemicalreactionratesinliquidsorgases.However,turbulencecanalsoleadtoincreasesindrag,aerodynamicheat,andhydrodynamicandaerodynamicnoise.Forinstance,theaerodynamicloadingofhigh-speedaircraftcanbesignificantlyincreasedduetoturbulence.

简介：2019年2月27日,西班牙-巴塞罗那,维谛技术(Vertiv)联同451Research共同发布了一项调查报告。