简介:Basedupon3widelyusedbasemodels,atotalof8ADA/GADAsiteindexmodelswerederived.Thedataforthesemodelsinthisstudywereobtainedfrom79pith-splitstemanalysisplotsandtheestimationmethodwas"indicatorvariableapproach".Weusedbothfitstatisticsandvisualanalysistoselectthebest-fitmodel,andattachedmoreimportancetothevisualanalysis.Acomprehensiveapplicationanalysiswasalsogiventotheselectedmodel.Theresultsshowed:1)GADAoutperformedADAwithrespecttopredictions.2)AGADAmodelderivedfromHossfeldⅣpresentedthebestpredictionability.Itwassuggestedthatthemodelbeusedtopredictdominantheightandtoestimatesiteindexforponderosapinestandsranging30-200yearsinBritishColumbia,Canada.3)Thebestsiteindexagewasageof100years,baseduponrelativeerrorsofpredictions.
简介:摘要目的对在院前急救的重要性以及特点和院前急救目前的现状等进行简要的分析。方法抽取在2011-2012年这一段时间内我院院前急救科所接受的急救患者病例106例,对这些病例的资料进行回顾性分析,总结院前急救的重要性以及特点和院前急救的现状等。结果本院救护车配备为良好,几乎车的空车率为27.7%左右,需要进行院前急救的病种主要为交通伤、急腹症、治安伤、突发心脏病等。患者的年龄分布较大一般在18-72岁之间不等,在所抢救的患者中外科患者所占比例较大一般为占58.6%左右。呼叫响应间期大约为10-15分钟左右。结论院前急救对临床工作而言具有十分重要的作用,在进行院前急救时要结合该地区的一些特点,对急救资源予以合理有效地利用,要加强相关人员的急救技术培训工作,确保急救能够真正做到及时有效。
简介:Toimprovethereliabilityandaccuracyoftheglobalpositioningsystem(GPS)/microelectromechanicalsystem(MEMS)inertialnavigationsystem(INS)integratednavigationsystem,thispaperproposestwodifferentmethods.Basedonwaveletthresholddenoisingandfunctionalcoefficientautoregressive(FAR)modeling,acombineddataprocessingmethodispresentedforMEMSinertialsensor,andGPSattitudeinformationisalsointroducedtoimprovetheestimationaccuracyofMEMSinertialsensorerrors.ThenthepositioningaccuracyduringGPSsignalshortoutageisenhanced.ToimprovethepositioningaccuracywhenaGPSsignalisblockedforlongtimeandsolvetheproblemofthetraditionaladaptiveneuro-fuzzyinferencesystem(ANFIS)methodwithpoordynamicadaptationandlargecalculationamount,aself-constructiveANFIS(SCANFIS)combinedwiththeextendedKalmanfilter(EKF)isproposedforMEMS-INSerrorsmodelingandpredicting.Experimentalroadtestresultsvalidatetheefficiencyoftheproposedmethods.