简介：正在EOS550D的热度还没消退时,佳能就在日本CP+数码影像展上发布了EOS600D。熟悉佳能单反相机的朋友们可能都会有疑惑,因为600D的规格怎么看也不像是一台换代产品。随着佳能官方表示600D将和550D一同销售,我们就豁然开朗了——600D是一台意图抢占细分

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简介：售价42万元或许你认为一部跑车哪里需要那么复杂的东西,简单对你来说本身就是种美,而EOS就是这样一部你要的车。EOS是大众的第一款硬顶敞篷车系,也是让大众可以与标致307CC等对手占领这一越来越大的硬顶敞篷车市场的杀手锏。EOS以大众ConceptC的同一平台开发,第一次见到ConceptC的时候就

简介：Asaspecialshift-invariantspaces,splinesubspacesyieldmanyadvantagessothattherearemanypracticalapplicationsforsignalorimageprocessing.Inthispaper,wepayattentiontothesamplingandreconstructionprobleminsplinesubspaces.Weimprovelowerboundofsamplingsetconditionsinsplinesubspaces.Basedontheimprovedexplicitlowerbound,aimprovedexplicitconvergenceratioofreconstructionalgorithmisobtained.Theimprovedconvergenceratiooccupiesfasterconvergenceratethanoldone.Attheend,somenumericalexamplesareshowntovalidateourresults.

简介：AbstractUpper respiratory tract samples are the most commonly used samples for coronavirus disease 2019 (COVID-19) diagnosis. The samples collected from the nasopharynx are preferred for viral nucleic acids detection. Commercial nasopharyngeal swabs (NPSs) are the major factor that influences the sampling quality. We here evaluated the acceptability and efficiency of NPSs from five manufacturers by examining the concentration of glyceraldehyde-3-phosphate dehydrogenase gene (GAPDH) retrieved from the swabs using the RT-PCR method. Significant different concentrations of GAPDH were detected, ranged from 4.36 × 108 copies/mL to 6.98 × 1010 copies/mL among the five swabs (P < 0.05). The designation of the swab head, with or without tip expansion, had limited influence on the collection efficiency. The discrepancy among the NPSs emphasized the improvement of the swab head material.

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简介：Opticalperformancemonitoringusingasynchronousopticalorelectricalsamplinghasgainedconsiderableattention.Relativeclockwanderbetweendatasignalandsamplingsourceisatypicaloccurrenceinsuchsystems.Amethodforthequantitativemonitoringoftherelativeclockwanderinasynchronousopticalundersamplingsystemispresented.Withaseriesofsimulations,theclockwandersrecoveredusingthismethodareingoodagreementwiththepresetclockwandersofdifferentamountsandfrequenciesforbothRZandNRZsignals.Hence,thereliabilityandrobustnessofthemethodareproven.

简介：Compressivesensingisarevolutionaryideaproposedrecentlytoachievemuchlowersamplingrateforsignals.Intheimageapplicationwithlimitedresourcesthecameradatacanbestoredandprocessedincompressedform.Analgorithmformovingobjectandregiondetectioninvideousingacompressivesamplingisdeveloped.Thealgorithmestimatesmotioninformationofthemovingobjectandregionsinthevideofromthecompressivemeasurementsofthecurrentimageandbackgroundscene.Thealgorithmdoesnotperforminversecompressiveoperationtoobtaintheactualpixelsofthecurrentimagenortheestimatedbackground.Thisleadstoacomputationallyefficientmethodandasystemcomparedwiththeexistingmotionestimationmethods.Theexperimentalresultsshowthatthesamplingratecanreduceto25%withoutsacrificingperformance.

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简介：Background:Dependingontreeandsitecharacteristicscrownbiomassaccountsforasignificantportionofthetotalabovegroundbiomassinthetree.Crownbiomassestimationisusefulfordifferentpurposesincludingevaluatingtheeconomicfeasibilityofcrownutilizationforenergyproductionorforestproducts,fuelloadassessmentsandfiremanagementstrategies,andwildfiremodeling.However,crownbiomassisdifficulttopredictbecauseofthevariabilitywithinandamongspeciesandsites.Thustheallometricequationsusedforpredictingcrownbiomassshouldbebasedondatacollectedwithpreciseandunbiasedsamplingstrategies.Inthisstudy,weevaluatetheperformancedifferentsamplingstrategiestoestimatecrownbiomassandtoevaluatetheeffectofsamplesizeinestimatingcrownbiomass.Methods:Usingdatacollectedfrom20destructivelysampledtrees,weevaluated11differentsamplingstrategiesusingsixevaluationstatistics:bias,relativebias,rootmeansquareerror(RMSE),relativeRMSE,amountofbiomasssampled,andrelativebiomasssampled.Wealsoevaluatedtheperformanceoftheselectedsamplingstrategieswhendifferentnumbersofbranches(3,6,9,and12)areselectedfromeachtree.Treespecificloglinearmodelwithbranchdiameterandbranchlengthascovariateswasusedtoobtainindividualbranchbiomass.Results:Comparedtoallothermethodsstratifiedsamplingwithprobabilityproportionaltosizeestimationtechniqueproducedbetterresultswhenthreeorsixbranchespertreeweresampled.However,thesystematicsamplingwithratioestimationtechniquewasthebestwhenatleastninebranchespertreeweresampled.Underthestratifiedsamplingstrategy,selectingunequalnumberofbranchesperstratumproducedapproximatelysimilarresultstosimplerandomsampling,butitfurtherdecreasedRMSEwheninformationonbranchdiameterisusedinthedesignandestimationphases.Conclusions:UseofauxiliaryinformationindesignorestimationphasereducestheRMSEproducedbyasamplingstrategy.Howe

简介：Point-basedsurfacehasbeenwidelyusedincomputergraphicsformodeling,animation,visualization,simulationofliquidandsoon.Furthermore,particle-basedapproachcandistributethesurfacesamplingpointsandcontrolitsparametersaccordingtotheneedsoftheapplication.Inthispaper,weexamineseveralkindsofalgorithmspresentedoverthelastdecades,withthemainfocusonparticlesamplingtechnologiesforimplicitsurface.Therefore,weclassifyvariousalgorithmsintocategories,describemainideasbehindeachcategories,andcomparetheadvantagesandshortcomingsofthealgorithmsineachcategory.

简介：Adoptingaprincipleof“check-acceptforthefirstrank,inspectionforthesecondrank”,thispaperbrieflydiscussestherationaleofthesamplinginspectionandthesamplinginspectionschemestodigitalproductsinGIS.TheOCcurveisdrawntoexplainthedeficiencyofthepercentsamplinginspection.Meanwhile,themethodofOneTimeLimitingQualityofcountselectionispresentedastheinspectionschemeforproductiondepartmentswhilethemethodofOneTimeAfter-inspectionMeanPercentDefectiveUpperLimitofcountselectionisforacceptancedepartments.

简介：在这份报纸，multivariate伯恩斯坦多项式定义在上一单一当由允许采样操作员在散布地点发生的采样操作员，和归纳被学习，被看。随机、确定的方面在学习被使用。在随机的方面上，为采样操作员的Chebyshev类型估计被建立。在确定的方面上，联合一致分发和差异方法的理论，接近的连续功能和L的率<啜class=“a-plus-plus”>为这些操作符的p集中分别地被学习。

简介：ＣｈｉｎａｔｏＣｏｎｄｕｃｔＯｎｅＰｅｒｃｅｎｔＰｏｐｕｌａｔｉｏｎＳａｍｐｌｉｎｇＳｕｒｖｅｙ￥／／ＣｈｉｎａｗｉｌｌｃｏｎｄｕｃｔａｏｎｅｐｅｒｃｅｎｔｐｏｐｕｌａｔｉｏｎｓａｍｐｌｉｎｇｓｕｒｖｅｙｏｎＯｃｔｏｂｅｒ１，１９９５，ａｃｃｏｒｄｉ...

简介：<正>Aftermorethan2,000yearsofhistoryasatradingcentreandcommu-nicationshubontheBeijing-HangzhouGrandCanal(firstduginthe5thcenturyBC),Huai’anhasacquiredanairofoldmoneyandmellowleisure.Itmustbeoneoffewsmall-sizedcitieswherepeopleareashappytospendtheirleisuretimeinoneofthedozensofopen-airteahousesorrestaurantsbythewaterasinanair-conditionedshoppingmall.

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简介：这份报纸描述使用条纹原则的一个完整的波形采样激光雷达系统。基于原来的条纹的边察觉，信号被建议的一种降噪的方法。这个方法与另外的降噪的方法相比，例如维纳过滤，吝啬的过滤并且中部的过滤。建议降噪的方法为处理波形信号是更有效的，这被发现。

简介：ThepaperpresentsandprovesanapproximateoptimalrelationshipbetweensamplesizenandacceptancenumbercinthesamplingplansunderimperfectinspectionwhichminimizetheBayesianrisk.TheconclusiongeneralizestheresultobtainedbyA.Haldontheassumptionthattheinspectionisperfect.

简介：近日，北京景明影像EOS俱乐部“感动常在”2014年会，在北京建银饭店顺利落下了帷幕。近一千位来自五湖四海的新老影友欢聚一堂，共同回首了一年走过的辉煌历程!年会现场，景明影像总经理张景明先生代表公司全体员工向一直支持和帮助景明影像的新老影友致以最诚挚的谢意，

简介：Thetrafficbufferingproblemsintheethernetoversynchronousdigitalhierarchy(EOS)areintroducedandanalyzed.Differentsolutionsarealsopresentedindetail.SynchronousDRAM(SDRAM)isusedasoff-chipbuffertostore-and-retransmissionethernetframes.Anewandeasycontroldesignisintroducedhere.Thebufferareasizeonchipisgreatlyreducedandthepowerdissipationislowedatthesametime.