简介：Resortingtocubicsplinefunctioninsteadofparametricsplinerepresentation,anexplicitfairnessindicatorandanefficientfairingalgorithmfor2Dcurvesarepresented.Theinputpointsequenceisfirstlypartitionedintoseveraloverlappedfunctionsegments.Foreachsegment,acubicsplinefunctionisusedastherepresentationtoolwhichentailsapolylineapproximationofcurvatureplot.Basedontheextrinsicrelationshipbetweenthepolylineandthepositionsofdatapoints,acoarse-to-finefaringmethodisproposedwhichefficientlyidentifiesandeliminatestheunnecessaryinflectionpoints.Ouralgorithmgeneratesthebestresultstodate,whichisvalidatedbynumerouspracticalexamples.

简介：高铁覆盖建设对TD-LTE网络具有重要意义，既可以为中国移动发展高端用户特别是其在高速数据业务方面提供网络支持，也有助于中国移动品牌推广。主要介绍了TD-LTE高速铁路场景下基于F频段与D频段组网的专用移动通信网络覆盖的相关问题及性能对比分析。

简介：Triangulationiswidelyusedinscientificresearch,suchasfiniteelementmeshgeneration,surfacereconstructionandthereconstructionofthedensityfielddata.Thispaperproposesanewmethodcombiningimageprocessinganddensity-controlledCentroidalVoronoitessellationstoquicklygenerateadensity-controlledconstrainedDelaunaytriangulationfor2Dseaarea.Firstly,preprocessdigitalimagesoftheseaareaandextracttheboundaryofseawaterregionbyeight-neighborsearchingalgorithm.Then,Iuse"Odd-EvenTesting"methodtocheckifonerandomvertexisinsidetheboundaryandinsertrandomverticesintotheboundary.Finally,wegettheCDTofrandomverticesbydensity-controlledCVT-Lloydmethod.Wealsogivesomecomparisonswithexistingmethods,andourmethodperformsbetterinfinalresultoftriangulation.

简介：本文在基于Hash函数的RFID安全认证协议基础上通过增加共享密钥、设置可动态更新的标签别名提高了认证过程中后端数据库查找标签时的查询效率,同时能够有效抵御追踪攻击,保障了标签的匿名性;在所有权转换过程中采用原所有者作为转换中介,能够保证标签信息的前向及后向安全性。