简介:Effectivelyandaccuratelymodellingthespatialrelationoffracturesurfacesiscrucialinthedesignandconstructionoflargehydropowerdamshavingacomplexunderlyinggeology.However,fracturesurfacesarerandomlyformedandvarygreatlywithrespecttotheirspatialdistribution,whichmakestheconstructionofaccurate3-Dmodelschallenging.Inthisstudy,weuseanoptimalMonteCarlosimulationanddynamicconditioningtoconstructafracturenetworkmodel.WefoundtheoptimalMonteCarlosimulationtoeffectivelyreducetheerrorassociatedwiththeMonteCarlomethodandusedynamicconditioningtoensuretheconsistencyofthemodelwiththeactualdistributionoffracturesontheexcavationfacesandoutcrops.WeappliedthisnovelapproachtoahydropowerstationontheJinshajiangRiver,China.Thesimulationresultsmatchedtherealsampledvalueswell,confirmingthatthemodeliscapableofeffectivelyandaccuratelysimulatingthespatialrelationsinafracturenetwork.
简介:通过对无线传感器网络WSN中的非测距定位(Range—free)技术进行分析,阐述非测距定位技术的基本思想,并对一些经典的非测距定位技术进行研究与比较。首先,阐述WSN中非测距定位技术的主要思想;其次,分析和比较一些典型的非测距定位技术;最后,分析非测距定位技术的研究现状与发展趋势。