简介:Acouplingframeofspeedgainandmaintainwassuggestedtoassesstheflightperformanceofhypersoniccruisevehicles(HCV).Theoptimalcruisespeedwasobtainedbyanalyzingtheflightperformancemeasuredbytheratioofinitialboostmasstogeneralizedpayload.TheperformanceofHCVsbasedonrocketsandair-breathingramjetswasstudiedandcomparedtothatofaminimum-energyballistictrajectoryunderacertainflightdistance.Itisconcludedthatrocket-basedHCVsflyingattheoptimalspeedar...
简介:Oneofthemaindriversforintelligenttransportationsystemsissafety.Adaptivecruisecontrol,asacommonsolutionfortrafficsafety,hasextendedfromradarstocameras.Duetohighmobilityofvehiclesandunevennessofroads,thepicturequalityofcamerashasbeengreatchallengesforcamera-basedadaptivecruisecontrol.Inthispaper,animagedistortioncorrectionalgorithmisaddressed.Ourmethodisbasedonopticalflowtechnologywhichisnormallyappliedinmotionestimationandvideocompressionresearch.Wearethefirsttoattempttoadaptitinimagedistortioncorrection.Twoopticalflowapproaches,theLucas-KanademethodandtheHorn-Schunckmethod,areselectedandcompared.Theprocedureofimagedistortioncorrectionusingtheopticalflowmethodhasbeentestedbybothsynthetictestimagesandcameraimages.TheexperimentalresultsshowthattheLucas-Kanademethodismoresuitableinthecorrectionofimagedistortion.
简介:为车辆适应巡航控制(ACC)系统,切换的性能在之间扼杀并且刹车决定开车舒适,燃料消费和车辆的服务生活机械部件。在这份报纸,有最佳的切换控制在之间的一个ACC算法扼杀并且刹车在模型被设计预兆的控制(MPC)框架。由介绍二进制整数变量,动力学扼杀并且刹车集成于为控制器设计的一模型表情。然后,ACC算法被设计满足不仅安全汽车列在后面,而且最佳的切换在之间扼杀并且刹车,它导致二次的编程由嵌套的二环的方法解决了的一个在网上混合的整数。模拟结果证明建议ACC算法满足安全汽车列在后面的要求,由执行更光滑的回答超过传统的算法,减少切换的时间在之间扼杀并且刹车,并且因此显著地改进开车舒适和燃料效率。
简介:摘要:轮式装载机在工程机械中占有较大的比重,在建筑施工、道路施工以及厂房建设等场阔应用较为广泛。本文以AVL CRUISE软件为基础,建立了轮式装载机的简易计算模型,并与装载机整车实际性能试验结果对比,吻合度较高,能很好的指导装载机用发动机的性能开发。
简介:[摘要]:根据某款纯电动垃圾车底盘的技术参数要求,进行底盘驱动电机和动力电池匹配,利用AVL CRUISE软件对该车动力性与经济性进行仿真分析。
简介:摘要:在聚丙烯行业中霍尼韦尔 R500版本能够根据客户的要求满足所需,且可以指定特定的优化方案。
简介:WhiletheAntarcticSlopeCurrent(ASC)hasbeenintensivelystudiedfortheEastAntarcticaslopeareaandtheWeddellSea,itsfateinthewesternAntarcticPeninsula(WAP)regionremainsmuchlessknown.DatafromtwocruisesconductedneartheSouthShetlandIslands(SSIs)andtheElephantIsland(EI),oneinaustralsummerof2004andoneinaustralwinterof2006,wereanalyzedtoprovideabroadpictureofthecirculationpatternoverthecontinentalslopeofthesurveyedarea,andaninsightintothedynamicalbalanceofthecirculation.Theresultsindicatethatsouthwestwardcurrentsarepresentovertheupperslopeinthestudyarea,indicatingtheASCintheWAPregion.NeartheShackletonGap(SG)northoftheEI,thesouthwestwardslopecurrentsneartheshelfbreakarecharacterizedbyawatermasscolderandfresherthantheambientwater,whichproducescross-slopedensitygradientsandthenverticalshearofthealong-slope(oralong-isobath)velocity.Theverticalshearisassociatedwithareversalofthealong-slopecurrentfromnortheastwardatsurfacetosouthwestwardindeeperlayers,oradepth-intensificationofthesouthwestwardslopecurrents.ThewatermasswithtemperatureandsalinitycharacteristicssimilartotheobservedcoldandfreshwaterisalsorevealedonthesouthernslopeoftheScotiaSea,suggestingthatthiscoldandfreshwaterisoriginatedfromtheScotiaSeaslopeandflowssouthwestwardthroughtheSG.OvertheshelfnorthoftheSSIs,thecoldandfreshwatermassisalsoobservedandoriginatesmainlyfromtheBransfieldStrait.Inthisarea,verticalstructureofthesouthwestwardslopecurrentsisassociatedwiththeonshoreintrusionoftheupperCircumpolarDeepWaterthatcreatescross-slopedensitygradients.