简介:Weproposeandexperimentallydemonstrateanovelultracompactdual-modewaveguidecrossingbasedonsub-wavelengthmultimode-interferencecouplersforadenselyintegratedon-chipmode-divisionmultiplexingsystem.Byengineeringthelateral-daddingmaterialindexandmanipulatingphaseprofilesoflightatthenanoscaleusinganimprovedinversedesignmethod,asubwavelengthstructurecouldtheoreticallyrealizetheidenticalbeatlengthforbothTE0andTE1,whichcanreducethescaleofthedevicegreatly.Thefabricateddeviceoccupiedafootprintofonly4.8μm×4.8μm.Themeasuredinsertionlossesandcrosstalkswerelessthan0.6dBand-24dBfrom1530nmto1590nmforbothTE0andTE1modes,respectively.Furthermore,ourschemecouldalsobeexpandedtodesignwaveguidecrossingsthatsupportmoremodes.
简介:Adual-channelaccessmechanismtoovercomethedrawbackoftraditionalsingle-channelaccessmechanismfornetwork-on-chip(NoC)isproposed.Intraditionalsingle-channelaccessmechanism,everyInternetprotocol(IP)hasonlyonechanneltoaccesstheon-chipnetwork.Whenthenetworkisrelativelyidle,theinjectionrateistoosmalltomakegooduseofthenetworkresource.Whenthenetworkisrelativelybusy,theejectionrateissosmallthatthepacketsinthenetworkcannotleaveimmediately,andthustheprobabilityofcongestionisincreased.Inthedual-channelaccessmechanism,theinjectionrateofIPandtheejectionrateofthenetworkareincreasedbyusingtwooptionalchannelsinnetworkinterface(NI)andlocalportofrouters.Therefore,thecommunicationperformanceisimproved.Experimentalresultsshowthatcomparedwithtraditionalsingle-channelaccessmechanism,theproposedschemegreatlyincreasesthethroughputandcutsdowntheaveragelatencywithreasonableareaincrease.
简介:Inthiswork,resultsonthestudyofthestructureandphotoluminescence(PL)propertiesofSiOxNythinfilmsarepresented.Thefilmsweredepositedatroomtemperatureusingadual-ion-beamco-sputteringsystem.TheXRDandTEMresultsshowthatthedepositedfilmshaveanamorphousstructure.IntheXPSresult,wefindN1sspectraconsistofonesymmetricsinglepeakat397.8eV,indicatingthatthenitrogenatomsaremainlybondedtosilicon.ItisinagreementtotheresultofFTIR.InSiOxNyfilms,anintensesinglePLpeakat590nmisobserved.Furthermore,withtheincreaseoftheNcontentintheSiOxNyfilms,theintensityofthePLpeakat590nmincreasesalot.ThePLpeakof590nmissuggestedtooriginatefromN-relateddefects.
简介:Basedontheassumptionthatarepresentativeelementofapearliticsteelisanaggregateofnumeroussphericalpearliticcolonieswithrandomlydistributedorientations,andthateachcolonyiscom-posedofmanyparallelfinelamellasofferriteandcementite,adescriptionforthedual-phasepearlilicsteelisobtainedbymakinguseofamicrostructure-basedconstitutiveequationforasingledual-phasepearliticcolonyandtheHill’sself-consistentscheme.Theelastoplasticresponseofdual-phasepearliticsteelBS11subjectedtoasymmetricallycyclicloadingisanalyzed,andacomparisonwiththeexperimentalresultsshowssatisfacto-ryagreement.Thenon-proportionalcyclicplasticityofBS11isalsoanalyzed,inwhichstressdevelopsalongasemi-circleinabiaxialtension/compressionandshearstressplane,asistypicallyexperiencedbythesur-faceelementsinrollingandslidingcontact.
简介:Attheeast-westeconomicandtradeexchangeandcooperationconferencesponsoredbytheChinaCouncilforthePromotionofInternationalTrade,Shaanxi’sVice-GovernorJiangXingzhenspokeaboutShaanxi’sinvestmentenvironmentanditsdualopeningstrategy.FirstlyMr.JiangmadeabriefintroductiononShaanxi.Shaanxi,locatedatthejunctionofthemiddleandwesternareasofChina,isoneoftheoriginsofChina’ssplendidancientcivilization.Itsrichmineralresourcesinclude92varietiesofprovenreserves,28ofwhich,includingmolybdenum,rhenium,mercury,coalandnaturalgashavereservesrankinginthefirstthreeand58rankinginthetopteninthecountry.The
简介:Adual-ratepreviewcontrolstrategyforatypeofdiscrete-timesystemisproposedbasedonthetheoryofmultiratecontrol.First,byusingthediscreteliftingtechnique,thegeneraldual-ratediscrete-timesystemisconvertedintoasingle-rateaugmentedsystem.Onthisbasis,theaugmentederrorsystemisconstructedbyintroducingafirst-orderdifferenceoperatorandthepreviewablereferencesignal.Thenthetrackingproblemistransformedintoaregulatorproblemoftheaugmentederrorsystem.Theoptimalpreviewcontrollawoftheaugmentederrorsystemisobtainedbyusingstandardlinearquadraticoptimalpreviewcontroltheory,andthentheoptimalpreviewcontrolleroftheoriginalsystemisderived.Inaddition,thenecessaryandsufficientconditionsforthecontrolleraregiven.Finally,simulationresultsshowtheeffectivenessoftheproposedmethod.
简介:Adual-bandbandpassmicrowavephotonicfilter(MPF)basedonstimulatedBrillouinscattering(SBS)istheoreticallyanalyzedandexperimentallydemonstrated.Twoseparatedtunablelasersources(TLSs)areemployedtogeneratetwopassbandsbyimplementingphasemodulationtoamplitudemodulationconversionbyusingSBSinducedsidebandamplification.Thecenterfrequenciesofbothpassbandscanbeindependentlytunedrangingfrom1GHzto19GHz.Highresolutionwith3dBbandwidthlessthan30MHzandlargeout-of-bandrejectionabout40dBunder25mWopticalpumppowerareachieved.
简介:ThegeneralizedBallcurvesofWang-SaidtypewithapositionparameterLnotonlyunifytheWang-BallcurvesandtheSaid-Ballcurves,butalsoincludeseveralusefulintermediatecurves.ThispaperpresentsthedualfunctionalsforthegeneralizedBallbasisofWang-Saidtype.Therelevantbasistransformationformulaearealsoworkedout.
简介:摘要目的制备同时携带IR780碘化物和硫酸长春新碱(VCR)的聚乳酸-羟基乙酸(PLGA)靶向纳米粒(IR780-VPN),并观察其在体外对肾母细胞瘤(SK-NEP1)的靶向作用及抗肾母细胞瘤增殖效率。方法制备IR780-VPN,检测其基本理化特性,培养SK-NEP1细胞作为体外肿瘤细胞模型,研究IR780-VPN的体外靶向性,观察以下6组的体外抗SK-NEP1细胞增殖效率:A组,PBS(对照组);B组,游离VCR;C组,空白纳米粒(PN);D组,载VCR纳米粒(VPN);E组,载IR780纳米粒(IR780-PN);F组,IR780-VPN。结果制备出的IR780-VPN平均粒径为(290.82±3.22)nm,粒径的分散指数(PDI)为0.024,平均Zeta电位为(1.16±0.87)mV。用细胞膜绿色荧光探针染色后于倒置荧光显微镜下观察,IR780-VPN大小均匀、形态规则,无聚集、粘连;透射电镜下观察IR780-VPN为球形或类球形,表面光滑,粒径分布均匀。其平均包封率为72.80%,平均载药量为2.80%,平均连靶率为91.30%。体外寻靶实验中可见SK-NEP1细胞表面有大量的IR780-VPN聚集。体外抗SK-NEP1细胞增殖实验证实,在相同药物质量浓度条件下,IR780-VPN组较VCR、VPN组的体外抗肿瘤细胞增殖效率高(P均<0.001),且游离VCR、VPN、IR780-VPN对SK-NEP1细胞增殖的抑制率具有浓度依赖性,药物质量浓度越大,对细胞的抑制作用越强(F=13254.105、54354.510、1370.059,P均<0.001);而随着药物质量浓度增加,PN、IR780-PN组的细胞增殖抑制率差异均无统计学意义(P均>0.05),PBS(对照组)对SK-NEP1细胞增殖的抑制率为(2.83±0.32)%。结论本实验成功制备了性质稳定的靶向IR780-VPN,对肾母细胞瘤细胞有良好的的靶向性,并提高了体外抗肾母细胞瘤增殖效率,为体内的肿瘤分子靶向研究提供了实验基础。
简介:Theconceptofdualimagereversibledatahiding(DIRDH)isthetechniquethatcanproducetwocamouflageimagesafterembeddingsecretdataintooneoriginalimage.Moreover,notonlycanthesecretdatabeextractedfromtwocamouflageimagesbutalsotheoriginalimagecanberecovered.Toachievehighimagequality,Luetal.'smethodappliedleast-significant-bit(LSB)matchingrevisitedtoDIRDH.Inordertofurtherimprovetheimagequality,theproposedmethodmodifiesLSBmatchingrevisitedrulesandappliesthemtoDIRDH.Accordingtotheexperimentalresults,theimagequalityoftheproposedmethodisbetterthanthatofLuetal.'smethod.
简介:Tow-phaseflowmixedvariationalformulationsofevolutionfiltrationproblemswithseawaterintrusionareanalyzed.Adualmixedfractionalflowvelocity-pressuremodelisconsideredwithanair-freshwaterandafreshwater-seawatercharacterization.Foranalysisandcomputationalpurposes,spatialdecompositionsbasedonnonoverlappingmultidomains,aboveandbelowthesealevel,arevariationallyintroducedwithinternalboundaryfluxesdualizedasweaktransmissionconstraints.Further,parallelaugmentedandexactlypenalizeddualityalgorithms,andproximationsemi-implicittimemarchingschemes,areestablishedandanalyzed.
简介:AbstractSchatzkter type-I tibial plateau fracture is a split fracture of the lateral tibial plateau in sagittal plane, consequent to valgus impaction caused by low velocity of trauma. However, a deep understanding of the different columns of the tibial plateau and patho-mechanisms of the injury led to the unmasking of atypical fractures around the tibial plateau. We have encountered 2 cases with unusual fracture pattern of the lateral tibial condyle caused by road traffic accidents. The fracture pattern and severity of injury deviate from the original description of Schatzker type 1; in view of dual plane split, there is rotation of the posterolateral column fragment along its sagittal plane plus grade-III medial collateral ligament injury. The patients were initially treated with knee spanning external fixator and after a latency of 5 days, definitive fracture specific fixation was done, combined with repair of grade-III medial collateral ligament injury. At the 6 months follow-up both the patients achieved satisfactory knee functions (knee society score case 1:100 and case 2: 92) and returned to their jobs. The severity of fracture pattern and displacement as described should prompt for examination of associated ligament injury. Because of timely diagnosis, early and appropriate care promised an excellent function outcome even in such a severe nature of knee injury. To prompt the description of injury pattern we coined the name "dual split and dislocation" of lateral tibial plateau, as a complex injury variant of split fracture of lateral tibial plateau fracture.
简介:Inthearticle,weattributethemaininstitutionalreasonsforimpactsoncitizenizationofmigrantworkerstotheurban-ruraldualinstitution,andanalyzeitscontentandthebasiccharacteristics.Thenempiricalanalysisoftheimpactonthewill,theability,decision-makingandprocessofcitizenizationofmigrantworkersisgivenbyuseofLogisticregressivemodelandinvestigationdata.Finallyaresultisfoundthatalthoughthemigrantworkershaveastrongdesireforbecomingcitizens,thevastmajorityofmigrantworkerscannotbeconvertedtothepublicbecauseoftheircapacityconstraints,soassoonaspossibletoimprovetheirabilityofcitizenizationbecomesthekeytopromotecitizenizationofmigrantworkers;furthermore,intheurban-ruraldualinstitution,inadditiontothehouseholdregistrationsystem,theemploymentsystem,thesocialsecuritysystem,thelandsystemandtheeducationsystemhaveobviousobstaclesonthewill,theabilitydecision-makingandprocessofcitizenizationofmigrantworkers.Therefore,thefuturefocusofinnovationoftheurban-ruraldualinstitutioncannotcontinuetoremainintheformalaspectsofthehouseholdregistrationsystem,butassoonaspossibletoswitchtoinnovationoftheemploymentsystem,thesocialsecuritysystem,thelandsystemandtheeducationsystemwhichhaveasubstantialimpactontherightsandbenefitsofruralmigrantworkers,suchasexpectationsandincome.