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简介：Thereentrytrajectoryplanningforhypersonicvehiclesiscriticalandchallenginginthepresenceofnumerousnonlinearequationsofmotionandpathconstraints,aswellasguaranteedsatisfactionofaccuracyinmeetingallthespecifiedboundaryconditions.Inthelasttenyears,manyresearchershaveinvestigatedvariousstrategiestogenerateafeasibleoroptimalconstrainedreentrytrajectoryforhypersonicvehicles.Thispaperbrieflyreviewsthenewresearcheffortstopromotethecapabilityofreentrytrajectoryplanning.Theprogressoftheonboardreentrytrajectoryplanning,reentrytrajectoryoptimization,andlandingfootprintissummarized.Themainchallengesofreentrytrajectoryplanningforhypersonicvehiclesareanalyzed,focusingontherapidreentrytrajectoryoptimization,complexgeographicconstraints,andcooperativestrategies.

简介：OnDecember18,2013,NationalHealthandFamilyPlanningCommission(NHFPC),MinistryofCivilAffairs,MinistryofFinance,MinistryofHumanResourcesandSocialSecurityandMinistryofHousingandUrban-RuralDevelopmentjointly

简介：Inthispaper,weaddressabasicproductionplanningproblemwithpricedependentdemandandstochasticyieldofproduction.Weusepriceandtargetquantityasdecisionvariablestolowertheriskoflowyield.Thevalueofriskcontrolbecomesmoreimportantespeciallyforproductswithshortlifecycle.Thisisbecause,theprofitimplicationsoflowyieldmightbeunbearableintheshortrun.WeapplyConditionalValueatRisk(CVaR)tomodelthe.risk.CVaRmeasureisacoherentriskmeasureandtherebyhavingniceconceptualandmathematicalunderpinnings.Itisalsowidelyusedinpractice.Weconsidertheproblemundergeneraldemandfunctionandgeneraldistributionfunctionofyieldandfindsufficientconditionsunderwhichtheproblemhasauniquelocalmaximum.Wealsobothanalyticallyandnumericallyanalyzetheimpactofparameterchangeontheoptimalsolution.Amongourresults,weanalyticallyshowthatwithincreasingriskaversion,theoptimalpriceincreases.ThisrelationisoppositetothatofinNewsvendorproblemwheretheuncertaintyliesindemandside.

简介：在一种紧急情况状况期间改进survivability，为飞机的一个算法强迫了登陆轨道计划被建议。方法集成计划进一个最佳的控制框架的损坏飞机建模和轨道。以便处理复杂飞机飞行动力学，解决的策略基于高斯pseudospetral方法(GPM)被介绍。A3-DOF考虑风的非线性的集体点的模型被开发接近在损失以后的飞机飞行动力学推进。答案最小化强迫的登陆持续时间，关于翻译改变的动力学，飞行信封限制和运作的安全要求的限制。GPM被用来变换计划问题到一个非线性的编程问题(NLP)的轨道，它被顺序的二次的编程算法解决。模拟结果证明建议算法能在事件产生最小时间的强迫的登陆轨道发动机外面与高效率和精确。

简介：NationalTeleconferenceonFamilyPlanningWorkwasheldinBeijingonFebruary27,2014.LiKeqiang,MemberoftheStandingCommitteeofCPCCentralCommitteePoliticalBureauandPremieroftheStateCouncilmadeimportantinstructions,'Adjustingandimprovingfertilitypolicies

简介：AccordingtoNHFPCwebsite,tostrengthenmoralconstructionofmedicalandhealthcareindustry,promotepracticesinaccordancewiththelawandadvocatehonestmedicalpractices,NationalHealthandFamilyPlanningCommission(NHFPC)andStateAdministrationofTraditionalChineseMedicinejointlyreleasedinDecember26,2013'NineProhibitionsto

简介：在实际波浪条件下面用一个大规模自己推动的模型进行水动力学和物理运动模拟测试是为研究轮船的环境适应性的一个重要工具。在自己推动的模型的航行测试期间，包括附近的各种各样的港口设备，航行设备，和轮船的复杂环境必须小心地被考虑，因为在这稠密的环境模型上的海波浪和风的影响是特别地重要的。为了改进自己推动的模型，的安全，这份报纸介绍基于加强学习学习的Q为模型碰撞回避与混乱想法结合了，以便改进计划的本地路径的可靠性。模拟和海测试结果证明这个算法与好适应性是在海风和波浪的干扰下面的自我航行模型的碰撞回避的一个更好的解决方案。

简介：Thispaperdescribespathre-planningtechniquesandunderwaterobstacleavoidanceforunmannedsurfacevehicle（USV）basedonmulti-beamforwardlookingsonar（FLS）.Near-optimalpathsinstaticanddynamicenvironmentswithunderwaterobstaclesarecomputedusinganumericalsolutionprocedurebasedonanAalgorithm.TheUSVismodeledwithacircularshapein2degreesoffreedom（surgeandyaw）.Inthispaper,two-dimensional（2-D）underwaterobstacleavoidanceandtherobustreal-timepathre-planningtechniqueforactualUSVusingmulti-beamFLSaredeveloped.Ourreal-timepathre-planningalgorithmhasbeentestedtoregeneratetheoptimalpathforseveralupdatedframesinthefieldofviewofthesonarwithaproperupdatefrequencyoftheFLS.Theperformanceoftheproposedmethodwasverifiedthroughsimulations,andseaexperiments.Forsimulations,theUSVmodelcanavoidbothasinglestationaryobstacle,multiplestationaryobstaclesandmovingobstacleswiththenear-optimaltrajectorythatareperformedbothinthevehicleandtheworldreferenceframe.Forseaexperiments,theproposedmethodforanunderwaterobstacleavoidancesystemisimplementedwithaUSVtestplatform.TheactualUSVisautomaticallycontrolledandsucceededinitsreal-timeavoidanceagainstthestationaryunderseaobstacleinthefieldofviewoftheFLStogetherwiththeGlobalPositioningSystem（GPS）oftheUSV.

简介：OnFebruary10,NationalMeetingonHealthandFamilyPlanningWorkwasheldinBeijing.Themeetinghadanin-depthstudyofthespiritsoftheEighteenthCPCNationalCongressandtheThirdPlenarySessionoftheEighteenthCentralCommitteeofthe