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287 个结果
  • 简介:在这份报纸,我们在一个二状态的调制Markov的双风险模型,获得到达,获得尺寸和开销被一个Markov过程在影响考虑红利问题。为打折的红利的期望的值的integro微分的方程的一个系统被导出直到毁灭。在指数的获得尺寸的情况中,方程被解决,最好的障碍经由数字例子被获得。用数字例子,最后,我们在一个联系平均复合泊松风险模型在二状态的调制Markov的双风险模型把最好的障碍和期望的打折的红利与那些作比较。数字结果建议一个人能使用联系平均复合泊松风险模型的结果接近那些为二状态的调制Markov的双风险当模特儿。

  • 标签: 马尔可夫调制 风险模型 屏障 微分方程系统 恒定 马尔可夫过程
  • 简介:Weproposeandexperimentallydemonstrateanovelultracompactdual-modewaveguidecrossingbasedonsub-wavelengthmultimode-interferencecouplersforadenselyintegratedon-chipmode-divisionmultiplexingsystem.Byengineeringthelateral-daddingmaterialindexandmanipulatingphaseprofilesoflightatthenanoscaleusinganimprovedinversedesignmethod,asubwavelengthstructurecouldtheoreticallyrealizetheidenticalbeatlengthforbothTE0andTE1,whichcanreducethescaleofthedevicegreatly.Thefabricateddeviceoccupiedafootprintofonly4.8μm×4.8μm.Themeasuredinsertionlossesandcrosstalkswerelessthan0.6dBand-24dBfrom1530nmto1590nmforbothTE0andTE1modes,respectively.Furthermore,ourschemecouldalsobeexpandedtodesignwaveguidecrossingsthatsupportmoremodes.

  • 标签: 亚波长结构 波导理论 通讯技术 技术创新
  • 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.

  • 标签: 片上网络 存取机制 双通道 成本效益 机制设计 访问机制
  • 简介:Inthiswork,resultsonthestudyofthestructureandphotoluminescence(PL)propertiesofSiOxNythinfilmsarepresented.Thefilmsweredepositedatroomtemperatureusingadual-ion-beamco-sputteringsystem.TheXRDandTEMresultsshowthatthedepositedfilmshaveanamorphousstructure.IntheXPSresult,wefindN1sspectraconsistofonesymmetricsinglepeakat397.8eV,indicatingthatthenitrogenatomsaremainlybondedtosilicon.ItisinagreementtotheresultofFTIR.InSiOxNyfilms,anintensesinglePLpeakat590nmisobserved.Furthermore,withtheincreaseoftheNcontentintheSiOxNyfilms,theintensityofthePLpeakat590nmincreasesalot.ThePLpeakof590nmissuggestedtooriginatefromN-relateddefects.

  • 标签: 光致发光 氮氧化硅薄膜 双离子束沉积 薄膜结构
  • 简介:Basedontheassumptionthatarepresentativeelementofapearliticsteelisanaggregateofnumeroussphericalpearliticcolonieswithrandomlydistributedorientations,andthateachcolonyiscom-posedofmanyparallelfinelamellasofferriteandcementite,adescriptionforthedual-phasepearlilicsteelisobtainedbymakinguseofamicrostructure-basedconstitutiveequationforasingledual-phasepearliticcolonyandtheHill’sself-consistentscheme.Theelastoplasticresponseofdual-phasepearliticsteelBS11subjectedtoasymmetricallycyclicloadingisanalyzed,andacomparisonwiththeexperimentalresultsshowssatisfacto-ryagreement.Thenon-proportionalcyclicplasticityofBS11isalsoanalyzed,inwhichstressdevelopsalongasemi-circleinabiaxialtension/compressionandshearstressplane,asistypicallyexperiencedbythesur-faceelementsinrollingandslidingcontact.

  • 标签: pearlitie steel LAMELLAR DUAL-PHASE material Hill’s
  • 简介:有混合边界节点方法(HBNM)的联合双交换方法(DRM),双交换混合边界节点方法(DRHBNM)与身体力量为三维的线性弹性问题被开发。没有领域积分,这个方法能被用来与身体力量解决弹性问题,它由HBNM是不可避免的。表明通用性和这个方法的快集中,有身体力量的3-D弹性问题的一些数字例子被检验。计算结果证明现在的方法是有效的并且能广泛地在解决实际工程问题被使用。

  • 标签: 混合边界节点法 双互惠性 弹性力学 质量力
  • 简介:Attheeast-westeconomicandtradeexchangeandcooperationconferencesponsoredbytheChinaCouncilforthePromotionofInternationalTrade,Shaanxi’sVice-GovernorJiangXingzhenspokeaboutShaanxi’sinvestmentenvironmentanditsdualopeningstrategy.FirstlyMr.JiangmadeabriefintroductiononShaanxi.Shaanxi,locatedatthejunctionofthemiddleandwesternareasofChina,isoneoftheoriginsofChina’ssplendidancientcivilization.Itsrichmineralresourcesinclude92varietiesofprovenreserves,28ofwhich,includingmolybdenum,rhenium,mercury,coalandnaturalgashavereservesrankinginthefirstthreeand58rankinginthetopteninthecountry.The

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  • 简介:Adual-ratepreviewcontrolstrategyforatypeofdiscrete-timesystemisproposedbasedonthetheoryofmultiratecontrol.First,byusingthediscreteliftingtechnique,thegeneraldual-ratediscrete-timesystemisconvertedintoasingle-rateaugmentedsystem.Onthisbasis,theaugmentederrorsystemisconstructedbyintroducingafirst-orderdifferenceoperatorandthepreviewablereferencesignal.Thenthetrackingproblemistransformedintoaregulatorproblemoftheaugmentederrorsystem.Theoptimalpreviewcontrollawoftheaugmentederrorsystemisobtainedbyusingstandardlinearquadraticoptimalpreviewcontroltheory,andthentheoptimalpreviewcontrolleroftheoriginalsystemisderived.Inaddition,thenecessaryandsufficientconditionsforthecontrolleraregiven.Finally,simulationresultsshowtheeffectivenessoftheproposedmethod.

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  • 简介:Adual-bandbandpassmicrowavephotonicfilter(MPF)basedonstimulatedBrillouinscattering(SBS)istheoreticallyanalyzedandexperimentallydemonstrated.Twoseparatedtunablelasersources(TLSs)areemployedtogeneratetwopassbandsbyimplementingphasemodulationtoamplitudemodulationconversionbyusingSBSinducedsidebandamplification.Thecenterfrequenciesofbothpassbandscanbeindependentlytunedrangingfrom1GHzto19GHz.Highresolutionwith3dBbandwidthlessthan30MHzandlargeout-of-bandrejectionabout40dBunder25mWopticalpumppowerareachieved.

  • 标签: 受激Brillouin散射 微波光子 滤波器 可调谐 带通 双频
  • 简介:ThegeneralizedBallcurvesofWang-SaidtypewithapositionparameterLnotonlyunifytheWang-BallcurvesandtheSaid-Ballcurves,butalsoincludeseveralusefulintermediatecurves.ThispaperpresentsthedualfunctionalsforthegeneralizedBallbasisofWang-Saidtype.Therelevantbasistransformationformulaearealsoworkedout.

  • 标签: 双功能 基本变形 算法 Wang-Said型 伯恩斯坦原理
  • 简介:隐藏的对称和一个无限的集合广告5S5上的格林Schwarz超弦的非局部的保存水流被Bena等指出了。在这篇论文,我们证明在MaurerCartan方程和运动的方程之间双的农夫在格林Schwarz超弦的moduli空格给隐藏的对称。因此由扭曲的转变vielbeins,我们能表示纸的水流[我。Bena,J。Polchinski,和R。Roiban,Phys。加快。D69(2004)046002]作为宽松的连接由一唯一光谱参数。

  • 标签: 超粒子 Hodge对偶 隐藏对称 分子物理学
  • 简介:新奇双旋转的线轴工具磨擦促使焊接(DBT-FSW)被开发,在哪个上面的肩膀(美国)和更低的肩膀(LS)有不同旋转速度。这个过程被试试焊接3.2?公里厚铝锂合金表。metallographic分析和转矩测量被执行描绘焊接formability。试验性的结果与常规线轴工具磨擦相比显示出那促使焊接,DBT-FSW有优秀进程稳定性,和罐头在大量焊接参数生产没有缺点的关节。这些能被归因于在US和LS之间的蹒跚的层结构和失衡的力量的形成在DBT-FSW过程期间引起的材料流动的重要改进。

  • 标签: 焊接参数 旋转速度 磨擦 工具 线轴 转矩测量
  • 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。

  • 标签: 靶向纳米粒 超声造影剂 肾母细胞瘤 细胞增殖
  • 简介:Theconceptofdualimagereversibledatahiding(DIRDH)isthetechniquethatcanproducetwocamouflageimagesafterembeddingsecretdataintooneoriginalimage.Moreover,notonlycanthesecretdatabeextractedfromtwocamouflageimagesbutalsotheoriginalimagecanberecovered.Toachievehighimagequality,Luetal.'smethodappliedleast-significant-bit(LSB)matchingrevisitedtoDIRDH.Inordertofurtherimprovetheimagequality,theproposedmethodmodifiesLSBmatchingrevisitedrulesandappliesthemtoDIRDH.Accordingtotheexperimentalresults,theimagequalityoftheproposedmethodisbetterthanthatofLuetal.'smethod.

  • 标签: 图像数据 数据隐藏 有效位 检验规则 可逆 配重
  • 简介:Tow-phaseflowmixedvariationalformulationsofevolutionfiltrationproblemswithseawaterintrusionareanalyzed.Adualmixedfractionalflowvelocity-pressuremodelisconsideredwithanair-freshwaterandafreshwater-seawatercharacterization.Foranalysisandcomputationalpurposes,spatialdecompositionsbasedonnonoverlappingmultidomains,aboveandbelowthesealevel,arevariationallyintroducedwithinternalboundaryfluxesdualizedasweaktransmissionconstraints.Further,parallelaugmentedandexactlypenalizeddualityalgorithms,andproximationsemi-implicittimemarchingschemes,areestablishedandanalyzed.

  • 标签: 海水入侵 变分分析 混合 两相流 过滤 演化
  • 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.

  • 标签: Tibial plateau fracture Schtazker classification Posterolateral Soft tissue injury
  • 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.

  • 标签: 实证分析 农民工 市民 机构 二元 城乡