简介：Renderingoflarge-scaleforestscenesisachallengingtask,whosehighlygeometriccomplexitywillputheavyburdenoncurrentgraphicshardware.Whennavigatingthescene,theoverallvisualresultisgenerallyconsideredasthecoreconcern.Anewmethodisproposedinthispaperforlarge-scaleforestrenderingusingclusteringandmergingstrategies.Ourmethodimprovestherenderingeffectbyclusteringpolygonsaccordingtothepointinformationwithrelationtoneighbours.Afastforestrenderingsystemisdevelopedaccordingly.Therelativetechniquesinthesystemcanimprovethevisualqualityondemandofdifferentapplications.

简介：Thenoisedatainverticalcomponentrecordsof85seismicstationsinFujianProvinceduring2012isusedastheresearchobjectinthispaper.Thenoisedataisdividedintofiveminutesegmentstocalculatethepowerspectra.Thehighreferencelineandlowreferencelineofstationarethenidentifiedbydrawingaprobabilitydensityfunctiongraph(PDF)usingthepowerspectralprobabilitydensityfunction.Moreover,accordingtotheanomaliesofPDFgraphsin85seismicstations,theabnormalnoiseisdividedintofourcategories:droppedpacket,lownoise,highnoise,andmediannoiseanomalies.Afterwards,fourselectionmethodsarefoundbythehighorlownoisereferencelineofthestations,andthesystemofreal-timemonitoringofseismicnoiseisformedbycombiningthefourselectionmethods.Noiserecordsof85seismicstationsinFujianProvinceinJuly2013areselectedforverification,andtheresultsshowthattheanomalousnoise-recognitionsystemcouldreacha90%successrateatmoststationsandtheeffectofselectionareverygood.Therefore,itcouldbeappliedtotheseismicnoisereal-timemonitoringinstations.

简介：ThetraditionalorientedFASTandrotatedBRIEF(ORB)algorithmhasproblemsofinstabilityandrepetitionofkeypointsanditdoesnotpossessscaleinvariance.Inordertodealwiththesedrawbacks,amodifiedORB(MORB)algorithmisproposed.Inordertoimprovetheprecisionofmatchingandtracking,thispaperputsforwardanMOKalgorithmthatfusesMORBandKanade-Lucas-Tomasi(KLT).ByusingKalman,theobject’sstateinthenextframeispredictedinordertoreducethesizeofsearchwindowandimprovethereal-timeperformanceofobjecttracking.TheexperimentalresultsshowthattheMOKalgorithmcanaccuratelytrackobjectswithdeformationorwithbackgroundclutters,exhibitinghigherrobustnessandaccuracyondiversedatasets.Also,theMOKalgorithmhasagoodreal-timeperformancewiththeaverageframeratereaching90.8fps.

简介：Parameterestimationofsignalsofuniversalsoftwareradioperipheral(USRP)devicesiscrucialtosolvetheproblemofphaseoffsetsofreceivedsignalsindistributedbeamforming.Forsystemsthatwillutilizetheclosedloopfeedbackalgorithmwherethereceiverneedstosendthereceivedsignalstrength(RSS)valuesperiodicallytothebeamformingnodesoastotakeadvantageofenergyconservation,thefrequencyandphaseofthesesignalsshouldbeestimatedbeforesmootheningbynonlinearfilters.ThisarticlepresentstheestimationofthefrequencyoffsetsofaGaussianminimumshiftkeying(GMSK)signalfromN210USRPdevicesinrealtimebyusingtheRadix-2fastFouriertransform(FFT)algorithminGNURadio.Forthesegreencommunicationsdevices,mostoftheneededhardwarepartshavebeensoftwaredefined,therebyreducingthesupposedenergyconsumption.Thefrequencyoffsetsfromreferencecarrierfrequenciesof900MHzand2.4GHzarelessthan3kHzeachbeforetheestimation,buttheaverageoffsetsare45Hzand100Hzaftertheestimation,respectively.Thehighoffsetvalueexperiencedwiththe2.4GHzcarrierwasduetoconsistentinterferencefromdevicesonthatsamefrequency.

简介：即时监视和3D可视化分析系统为水坝基础窗帘grouting被建议。基于即时控制技术，优化方法和集合理论，系统的一个数学模型被建立。grouting数据的即时收集和传播技术为系统提供一个数据基础。监视的即时grouting和动态惊动方法帮助系统在grouting期间控制grouting质量这样，处理grouting的畸形，例如jacking并且水力高举，能有效地被控制。另外，3Dgrouting可视化分析技术被建议建立grouting信息模型(GIM)。GIM提供一个平台设想并且分析grouting过程和结果。系统作为案例研究被用于中国的一个水力的工程，并且应用程序结果显示监视的即时grouting和为grouting进程的3D可视化分析能帮助工程师更高效地控制grouting质量。

简介：Andynamicsystemforreal-timeobstacleavoidancepathplanningofredundantrobotsisconstructedinthispaper.Firstly,theinter-framedifferencemethodisusedtoidentifythemovingtargetandtocalculatethetargetarea,thenonthebasisofcolorfeaturesandgradientfeaturesextractedfromthetargetarea,thefeaturefusionCam-Shiftmeanshiftalgorithmisusedtotracktarget,improvingtherobustnessofthetrackingalgorithm.Secondly,aparalleltwo-channeltargetidentificationandlocationmethodbasedonbinocularvisionisproposed,updatingthetarget’sthree-dimensionalinformationinrealtime.Then,adynamiccollision-freepathplanningmethodisimplemented:thesafetyrodsareremovedthroughtheintersectiontest,andtheminimumdistanceisderiveddirectlybyusingthecoordinatevaluesofthetargetinthelocalcoordinatesystemoftherod.Onthisbasis,theobstacleavoidancegainandescapevelocityrelatedtotheminimumdistanceisestablished,andobstacleavoidancepathplanningisimplementedbyusingthezerospacemappingmatrixofredundantrobot.Experimentsareperformedtostudytheefficiencyoftheproposedsystem.

简介：Graphicprocessingunits(GPUs)havebeenwidelyrecognizedascost-efficientco-processorswithacceptablesize,weight,andpowerconsumption.However,adoptingGPUsinreal-timesystemsisstillchallenging,duetothelackinframeworkforreal-timeanalysis.Inordertoguaranteereal-timerequirementswhilemaintainingsystemutilizationinmodernheterogeneoussystems,suchasmulticoremulti-GPUsystems,anovelsuspension-basedk-exclusionreal-timelockingprotocolandtheassociatedsuspension-awareschedulabilityanalysisareproposed.TheproposedprotocolprovidesasynchronizationframeworkthatenablesmultipleGPUstobeefficientlyintegratedinmulticorereal-timesystems.Comparativeevaluationsshowthattheproposedmethodsimproveupontheexistingworkintermsofschedulability.

简介：Thesecond-generationGlobalOceanDataAssimilationSystemoftheBeijingClimateCenter(BCC_GODAS2.0)hasbeenrundailyinapre-operationalmode.Itspanstheperiod1990tothepresentday.ThegoalofthispaperistointroducethemaincomponentsandtoevaluateBCC_GODAS2.0fortheusercommunity.BCC_GODAS2.0consistsofanobservationaldatapreprocess,oceandataqualitycontrolsystem,athree-dimensionalvariational(3DVAR)dataassimilation,andglobaloceancirculationmodel[ModularOceanModel4(MOM4)].MOM4isdrivenbysix-hourlyfluxesfromtheNationalCentersforEnvironmentalPrediction.Satellitealtimetrydata,SST,andin-situtemperatureandsalinitydataareassimilatedinrealtime.ThemonthlyresultsfromtheBCC_GODAS2.0reanalysisarecomparedandassessedwithobservationsfor1990-2011.TheclimatologyofthemixedlayerdepthofBCC-GODAS2.0isgenerallyinagreementwiththatofWorldOceanAtlas2001.ThemodeledsealevelvariationsinthetropicalPacificareconsistentwithobservationsfromsatellitealtimetryoninterannualtodecadaltimescales.PerformancesinpredictingvariationsintheSSTusingBCC_GODAS2.0areevaluated.ThestandarddeviationoftheSSTinBCC-GODAS2.0agreeswellwithobservationsinthetropicalPacific.BCC-GODAS2.0isabletocapturethemainfeaturesofE1NinoModokiIandModokiⅡ,whichhavedifferentimpactsonrainfallinsouthernChina.Inaddition,therelationshipsbetweentheIndianOceanandthetwotypesofE1NinoModokiarealsoreproduced.

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简介：ArealLiouvilledomainisaLiouvilledomainwithanexactanti-symplecticinvolution.TheauthorscallarealLiouvilledomainuniruledifthereexistsaninvariantfiniteenergyplanethrougheveryrealpoint.Asymptotically,aninvariantfiniteenergyplaneconvergestoasymmetricperiodicorbit.Inthisnote,theyworkoutacriterionwhichguaranteesunirulednessforrealLiouvilledomains.

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简介：在这份报纸，我们由输出反馈控制学习分离线性时间延期系统的输出规定问题。我们为连续线性时间延期系统的产量规定问题建立了一些结果平行到那些。

简介：Inthispaper,weproposeasusceptible-infected-susceptible(SIS)modeloncomplexnetworks,small-world(WS)networksandscale-free(SF)networks,tostudytheepidemicspreadingbehaviorwithtimedelaywhichisaddedintotheinfectedphase.Consideringtheuniformdelay,thebasicreproductionnumberR_0onWSnetworksandR_0onSFnetworksareobtainedrespectively.OnWSnetworks,ifR_0≤1,thereisadisease-freeequilibriumanditislocallyasymptoticallystable;ifR_0>1,thereisanepidemicequilibriumanditislocallyasymptoticallystable.OnSFnetworks,ifR_0≤1,thereisadisease-freeequilibrium;ifR_0>1,thereisanepidemicequilibrium.Finally,wecarryoutsimulationstoverifytheconclusionsandanalyzetheeffectofthetimedelayr,theeffectiverateλ,averageconnectivityandtheminimumconnectivitymontheepidemicspreading.

简介：摘要目的研究细菌检验中应用PCR检验法的效果。方法抽取我院2015年1—6月中，确诊为阴道炎的患者66例，并采集患者的阴道分泌物，对其应用细菌培养法和PCR检验法进行细菌学检测，对比分析不同的检测方法检测的结果。结果PCR检验法细菌检出率明显优于细菌培养法，两组患者比较差异有统计学意义，P＜0.05。结论PCR检验方法检验准确率高、效率高以及临床价值显著，值得在临床推广应用。

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简介：这份报纸在相同平行用机器制造最小化最大的流动时间的m上与拒绝考虑安排问题。甚至当有一台单个机器，所有工作有二个不同出版日期时，作者证明这个问题是NP难的。而且，在场的作者一个动态编程算法和二个近似算法到解决他们。

简介：摘要目的探讨PCR检测人乳头瘤病毒的方法及注意事项。方法对38例宫颈分泌物进行检测分析。结果38例受检宫颈分泌物检测，其中检测出HPV阳性34例，其中低危亚型10株，高危亚型24株。其中高危亚型HPV16型16例，HPV18型2例，HPV33型2例，HPV58型2例，HPV52型1例，HPV66型1例。低危亚型主要以HPV6和HPV11型为主。结论PCR技术操作简便、出结果快、灵敏度高及特异性强，已广泛用于生命科学的各个领域，在卫生检验中主要用于病原体的快速检验或不易培养的微生物的检测。