简介:AbstractIntra-abdominal infection (IAI) is a deadly condition in which the outcome is associated with urgent diagnosis, assessment and management, including fluid resuscitation, antibiotic administration while obtaining further laboratory results, attaining precise measurements of hemodynamic status, and pursuing source control. This last item makes abdominal sepsis a unique treatment challenge. Delayed or inadequate source control is an independent predictor of poor outcomes and recognizing source control failure is often difficult or impossible. Further complicating issue in the debate is surrounding the timing, adequacy, and procedures of source control. This review evaluated and summarized the current approach and challenges in IAI management, which are the future research directions.
简介:这份报纸用单个万向节的控制时刻旋转罗盘(CMG)和磁性的torquers(MTQ)集中于小活泼的卫星的态度控制问题。因为他们的转矩扩大能力,CMG为活泼的卫星被认为是有效转矩发电机。然而,他们由于他们的复杂内部机制对失败脆弱。在这份报纸,CMG的不同失败盒子被分析。灵活失败容忍的控制策略被自动地在操作CMG和MTQ之中再分配要求的控制转矩开发,与提供CMG失败介绍的致动器动力学变化的可变limiter。关于在不同失败盒子下面的不同方向的演习的表演也被讨论并且检验。数字模拟证明建议策略在一或二CMG失败的情况中维持某些活泼。而且,有仅仅离开的一CMG的幸存策略也被验证。指太阳的稳定和指地球的稳定能在这种情况中被完成,它完成一些基本使命要求。
简介:Asimulationmodelisintroducedaboutthenon-linearityprocessofshort-circuitingtransferinCO2arcweldingfordisplayingtheinteractionbetweentheinverterpowersourceandweldingarcunderwaveformcontrol.Inthesimulationmodel,thefeedbacksignalsofcurrentandvoltagearetakenrespectivelyatthedifferentphaseinashortcircuitperiodictimeandappliedtothePWM(pulsewidthmodulation)moduleinamodelofinverterpowersourcetocontroltheoutputofpowersource.ThesimulationoperationaboutthedynamicprocessofCO2short-circuitingtransferweldingisimplementedonthefoundedsimulationmodelwithapeakarccurrentof400Aandapeakvoltageof35V,producingthedynamicarcwaveformswhichcanembodytheeffectofinverterharmonicwave.Thesimulatingwaveformsareclosetothatofweldingexperiments.
简介:活跃力量过滤器(APF)基于电压来源inverter(VSI)是为处理力量质量问题的重要措施之一。算术地,APF模型尽最大努力格子是典型的非线性的。被动的想法是一个强大的工具学习如此的一个非线性的系统的稳定。在这篇论文,四腿的APF的一个州空间的模型被导出,基于哪个为当前的追踪的一个新H无穷控制器从被动观点被建议。它能完成asymptotic不仅在L_2获得的意义追踪,而且骚乱变细。随后,保证theboundedness的一个足够的条件和DC电压的需要的平均数也被给。这个直接条件与电的电路的平衡力量的法律一致。在PSCADplatform上执行的模拟验证新途径的有效性。
简介:Despitethedevelopmentofnoninvasivetoolsasechocardiography,right-sidedheartcatheterizationremainsanintegralpartofthecardiovascularevaluation.Inthelastdecade,betterunderstandingofthehemodynamicprocessbeforeheartfailuredecompensationledtoimprovementofoutpatientstrategiestopreventit.Advancesinimplantablewirelesstechnologynowallowfrequentanddirectmeasurementofintracardiacfillingpressures,whichcanbemonitoredbyhealthcareproviderstohelptailortherapytoreducefillingpressuresandhospitalreadmissionrates.
简介:Thekeytosurvivalforanyconte-mporarybrandiscrossover,andwhenyourbrandisalifestylethatexpressesitselfinclothing,music,andart,thenfindinganoutletthattraverseseveryleveliscrucial.
简介:<正>Successiswonderful,nobodycandenythis.However,Ibelievethatfailurecanalsobedesirable.It’sonlyamatterofperception.Failure