简介:Theabstractshouldbestructuredintothesubsections'BACKGROUND','OBJECTIVE','DESIGN,TIMEANDSETTING','PARTICIPANTS/MATERIALS','INTERVENTIONS/METHODS','MAINOUTCOMEMEASURE(S)','RESULTS',and'CONCLUSION'.BACKGROUND:Aconcisestatementofthehistoryandsignificanceofthestudy.OBJECTIME:Statethepreciseobjectiveorstudyquestionaddressedinthereport(e.g.,'Todeterminewhether...').Ifmorethanoneobjectiveis
简介:Wereviewthepresentstatusandfutureprospectsoffastignition(FI)researchofthetheoreticalgroupattheIAPCM(InstituteofAppliedPhysicsandComputationalMathematics,Beijing)asapartoftheinertialconfinementfusionproject.SincetheapprovaloftheFIprojectattheIAPCM,wehavedevotedoureffortstoimprovingtheintegratedcodesforFIanddesigningadvancedtargetstogetherwiththeexperimentalgroup.RecentFIexperiments[K.U.Aklietal.,Phys.Rev.E86,065402(2012)]showedthatthepetawattlaserbeamenergywasnotefficientlyconvertedintothecompressedcorebecauseofthebeamdivergenceofrelativisticelectronbeams.Thecouplingefficiencycanbeimprovedinthreeways:(1)usingacone–wire-in-shelladvancedtargettoenhancethetransportefficiency,(2)usingexternalmagneticfieldstocollimatefastelectrons,and(3)reducingtheprepulselevelofthepetawattlaserbeam.TheintegratedcodesforFI,namedICFI,includingaradiationhydrodynamiccode,aparticle-in-cell(PIC)simulationcode,andahybridfluid–PICcode,havebeendevelopedtodesignthisadvancedtargetattheIAPCM.TheShenguang-IIupgradedlaserfacilityhasbeenconstructedforFIresearch;itconsistsofeightbeams(intotal24kJ/3ω,3ns)forimplosioncompression,andaheatinglaserbeam(0.5–1kJ,3–5ps)forgeneratingtherelativisticelectronbeam.AfullyintegratedFIexperimentisscheduledforthe2014project.
简介:Inthispaper,thecauseofbit-errorisanalyzedwhendataaredecidedintheopticalreceiver.AmonolithicD-ffdecisioncircuitisdesigned.Itcanworkeffectivelyat622Mb/s.Moreover,adecisionmethodofparallelprocessingtoimprovethddecisionspeedispresented,throughwhichtheparallelcircuitcanworkupto1Gb/susingthesamemodel.Withthetechnique,higher-speeddatacanbedecidedbyusinglowerspeeddevice.
简介:Biomimeticdesignemploystheprinciplesofnaturetosolveengineeringproblems.Suchdesignswhicharehopedtobequick,efficient,robust,andversatile,havetakenadvantageofoptimizationvianaturalselection.Inthepresentresearch,anenvironment-friendlypropulsionsystemmimickingundulatingfinsofstingraywasbuilt.Anon-conventionalmethodwasconsideredtomodeltheflexibilityofthefinsofstingray.Atwo-degree-of-freedommechanismcomprisedofseverallinkageswasdesignedandconstructedtomimictheactualflexiblefin.Thedrivinglinkageswereusedtoformamechanicalfincon-sistingofseveralfinsegments,whichareabletoproduceundulations,similartothoseproducedbytheactualfins.Owingtothemodularityofthedesignofthemechanicalfin,variousundulatingpatternscanberealized.Somequalitativeobservations,obtainedbyexperiments,predictedthatthethrustsproducedbythemechanicalfinaredifferentamongvariousundulatingpatterns.Tofullyunderstandthisexperimentalphenomenonisveryimportantforbetterperformanceandenergysavingforourbioroboticunderwaterpropulsionsystem.Here,fourbasicundulatingpatternsofthemechanicalfinwereperformedusingtwo-dimensionalunsteadycomputationalfluiddynamics(CFD)method.Anunstructured,grid-based,unsteadyNavier-Stokessolverwithautomaticadaptivere-meshingwasusedtocomputetheunsteadyflowaroundthefinthroughtwentycompletecycles.Thepressuredistributiononfinsurfacewascomputedandintegratedtoprovidefinforceswhichweredecomposedintoliftandthrust.Thepressureforceandfrictionforcewerealsocomputedthroughouttheswimmingcycle.Finally,vortexcontourmapsofthesefourbasicfinundulatingpatternsweredisplayedandcompared.
简介:BasedonthebiologicalresourcessurveysinChina'sexclusiveeconomiczone,thepaperdiscussestheapplicationoftheGIStechnologyinevaluatingthemarineenvironmentalquality,establishesthebasicconceptandtechnologicalprocessforevaluatingtheenvironmentalqualityofthehabitatsofmarinelivingresources,proposesthekeypointsfortheestablishmentoftherelevantevaluationattributesdatabasebyapplyingtheGIStechnologyandanalysesseveraltypicalevaluationmodelsandthedatainterpolationmethodforthemodelinGIS.ResultsshowthatthecombinationoftheGIStechnologywiththequantitativeevaluationmodelcanbeappliedtothefastandaccurateevaluationofthemarineenvironmentalquality.
简介:Alasersimulatorisproposedwhichisbasedonahardware-in-loop(HWIL)simulationtestsystem.Asanimportantdeviceinthesimulationtestsystem,itisusedtosimulatethelaserenergyandthedivergenceangle.ThelasersimulatorsimulatestheattenuationprocessoflaserenergybythecontinuousrotationofGlanprismsandthechangingoflaserspotsizethroughthecontinuousmotionofthelaserbeamexpandingtelescopeonthestraightplatform.Thedynamicattenuationvelocityofthelasersimulatorisupto4dB/s,andthedivergenceangleadjustmentvelocityisupto3mrad/s.Themethodisfeasibleforthesimulationtest.
简介:Thenoisedatainverticalcomponentrecordsof85seismicstationsinFujianProvinceduring2012isusedastheresearchobjectinthispaper.Thenoisedataisdividedintofiveminutesegmentstocalculatethepowerspectra.Thehighreferencelineandlowreferencelineofstationarethenidentifiedbydrawingaprobabilitydensityfunctiongraph(PDF)usingthepowerspectralprobabilitydensityfunction.Moreover,accordingtotheanomaliesofPDFgraphsin85seismicstations,theabnormalnoiseisdividedintofourcategories:droppedpacket,lownoise,highnoise,andmediannoiseanomalies.Afterwards,fourselectionmethodsarefoundbythehighorlownoisereferencelineofthestations,andthesystemofreal-timemonitoringofseismicnoiseisformedbycombiningthefourselectionmethods.Noiserecordsof85seismicstationsinFujianProvinceinJuly2013areselectedforverification,andtheresultsshowthattheanomalousnoise-recognitionsystemcouldreacha90%successrateatmoststationsandtheeffectofselectionareverygood.Therefore,itcouldbeappliedtotheseismicnoisereal-timemonitoringinstations.
简介:DigitaldecayspectroscopyofactinideisotopesatthegasfilledseparatorSHANSAlloverthechartofnuclides,theregiontothe“north-east”of208Pb,withZ≥84andN=128~130,hoststheshortest-livedαradioactivities,withhalf-livesintherangeofnanosecondstomicroseconds.Synthesisanddetectionofneutron-deficientisotopesabovethoriuminthisregionarechallengingduetotheirlowproductioncrosssectionsandshorthalf-lives.
简介:Inthispaper,usedBSO(Bi12SiO20)crystalasahologramrecordingmaterial,TV-cameraasadetector,andaholographicsetupcontrolledbyacomputer,automaticallycalculatinghologramof3-interferogramsmethodistheoreticallyandexperimentallystudied.Thisnewholographicrecordingmaterialandautomaticallycalculatinghologrammakeitpossibletousereal-timeholographyinanindustry.Asapracticalexample,theshrinkingof2-componentsadhesivein4hismeasured.
简介:Throughtheanalysisoftheprinciple,errorsourcesandprecisionoftrigonometricleveling,thispaperpointsoutthekeyproblemsaboutfirstorderlevelingreplacedbytrigonometricleveling;andforthefirsttimeputsforwardthat,insomegivenconditions,itisnotonlyfeasiblebutalsovaluabletoreplacefirstorderlevelingbyprecisetrigonometricleveling,andprovesitbyexperimentationaswell.Thecontentandconclusionofthispaperhaveconsultingsignificanceandpracticablevalueforoursettingdownrelationalcriterionandproductionpractice.
简介:钢的地震行为增强了高力量,高效水泥(SRHC)框架列通过16框架列的伪静电干扰实验被调查与各种各样砍跨度比率,轴的压缩比率,具体力量,钢比率和马镫比率。三种失败机制被介绍,有不同设计参数的试验性的hysteretic曲线和骨骼曲线的特征被讨论。列韧性和精力驱散是基于地震抵抗评估的份量上。研究结果显示SRHC框架列能承受韧性的极端适用的能力,而是能力,因为SRHC自然易碎物,精力驱散是劣等的。作为结果,轴的负担比率应该被限制,一些构造措施采用了,例如增加马镫比率。这研究在SPHC列的适用的能力上建立了效果因素。最后,为用曲折失败模式获得最终的适用的能力的一个算法基于一个修改飞机节假设被建立。作者也证实决定砍的baroclinic失败并且砍的方程结合失败基于轴的负担力量分发比率的累积。计算结果砍忍受能力因为不同失败模式在对试验性的结果的好同意。
简介:AbstractDecidualization is a special type of differentiation of endometrial stromal cells into secretory decidualized cells, which is closely related to the occurrence of menstruation and establishment of pregnancy. Decidualization abnormalities can cause female infertility and abortion, and the decidualization model in vitro is an important tool for studying relevant mechanisms. This article summarizes several in vitro decidualization models in recent research from three aspects, including the selection of model cells and culture systems, evaluation of decidualization markers, and induction schemes. These models can be appropriately selected and applied in specific endometrium-related disease models, such as endometriosis, recurrent pregnancy loss, and preeclampsia.