简介：

简介：为树立高档车的典范,新型CROWN(皇冠)的开发思想是:一切从零开始。

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：Thetitlepolymerwaspreparedfrom5-diethylamino-3-thia-pentylglycidyletheranddiethyleneglycolbisglycidyletherviaring-openingcopolymerization.Itwasfoundthatthisreactioncouldbecatalyzedbysodium,butnotLewisacid.Theobtainedpolymercancoordinatewithplatinumcompound,andtheplatinumcomplexisanewkindofcatalystforthehydrosilylationofolefinswithtriethoxysilane.

简介：GOOD舒适、安静、工艺好BAO后排空间不如对手当一辆车发展到第14代产品,不论它是什么品牌,都承载着众多期望,而多年之后还能大刀阔斧地去革新,则更为不易。TOYOTACROWN双显示屏符合当前潮流趋势,看着也更具备科技感,从使用上来说,下屏比上屏更好用革新但同样保留精华1955年皇冠系列的第一款产品问世,这之后的60年,它已发展成为日系高端车型典范,并且衍生出众多版本,而在2015年初,它将在中国正式揭开第14代车型的面纱。虽然早在去年的广州车展就已经亮相,但真的想让普罗大众亲身体验,还是要等到2015年3月份之后,

简介：新奇的宏有切换氧化还原作用的二硫化物连接的周期的dilactams被综合。这些混合物被快增加方法在中等收益在宏环合步从2,2′-dithiodibenzoyl氯化物获得。

简介：Variousmethodsforsynthesisof2-methyl-5,6-(1,4,7,10,13-pentaoxatridecamethyl-ene)benzotellurazole(8)aredescribed.Underdifferentconditions,alkylationofcompound8withmethyliodidegavetelluroniumsalt1,2-dimethyl-5,6-(1,4,7,10,13-pentaoxatridecamethylene)benzo-tellurazoliumiodide(15)orquaternaryammoniumsalt2,3-dimethyl-5,6-(1,4,7,10,13-pentaoxatri-decamethylene)benzotellurazoliumiodide(14)inhighyields,repectively.Thecyaninedye3,3’-dimethyl-5,6,5’,6’-bis(1,4,7,10,13-pentaoxatridecamethylene)telluracarbocyanineiodide(16)isobtainedbycondensationof14withethylorthoformateinaceticanhydride.Thevisibleabsorptionofthecyaninedyeisalsodiscussed.

简介：Networkcrownetherpolymerwithpendantsulfidesidechaininthenetworkstructureunitshasbeensynthesizedviaring-openingcopolymerizationofβ-ethylthioethylglycidyletheranddiethyleneglycolbisglycidylether.Akindofactivecatalystsuitableforthisreactionwassuggested.Thetitlepolymerwasfoundtobeagoodligandforplatinouschloride,andtheplatinouscomplexcouldcatalyzethehydrosilylationofolefinswithtriethoxysilaneefficiently.

简介：<正>AttheinvitationoftheChineseAssociationforInternationalUnderstanding(CAFIU),CrownPrinceTupouto’a’UlukalalaandCrownPrincessSinaitakalaoftheKingdomofTongavisitedChinafromDecember8toDecember14,2014.

简介：Silica-bound15-Crown-5,18-Crown-6withaspacerofpropyloxymethylandtheirplatinumcomplexeshavebeensynthesized.Itwasfoundthattheywereefficientcatalystsforthehydrosilylationofolefmswithtriethoxysilaneinthetemperaturerangeof60to130℃.

简介：Thenovelcomplex[K(18-C-6)]2[Cd(mnt)2][18-C-6-18-crown-6,nmt=1,2-dicyanoethene-1,2-dithiolate,C2S2-(CN)2^2-]wassynthesizedandcharacterizedbyelementalanalysis,IRspectrumandX-raydiffractionanalysis.Thecomplexdisplaystwo-dimensionalnetworkstructureof[K(18-C-6)]complexsegmentsand[Cd(nmt)2]complexsegmentbridgedbyS-K-S,S-K-NandN-K-Ninteractionsbetweenadjacent[K(18-C-6)]and[Cd(mnt)2]units.

简介：Thesinglecrystalofthecomplex[Sc（NO3）3（H2O）2]·（15C5）hasbeenpreparedinacetonitrile.Thenewcomplexhasbeencharacterizedbyelementalanalysis,IRspectra,solubilityandmolarconductancemeasurements.ThestructureofthecomplexisdeterminedbysinglecrystalX-raydiffractionanalysis.

简介：The4-hicoldmillisoneofthekeywidestriptandemcoldrollingmillsandhasmanyadvantagesandcharacteristics.Themilltypeisthemostimportant,fundamentalandlong-termeffectivefactorforthestripshapecontrol.ManyadvancedmilltypessuchasCVC-4,HCWandPC-4,etcarecreatedbasedontheconventionalfour-rollmill.Thefactorsofmilltypewhichaffectthedeformationofrollsystem,suchasstripwidth,rollingforce,bendingforce,workrolldiameter,backupdiameterandsoon,arestudiedhowtoaffectrollgapcrown.Itprovidesagoodfoundationforimprovingtheshapeperformanceofmill.

简介：<正>阿联酋的Crown造纸厂,正在为新的PM2造纸生产线进行工程建设及组装工作。预计在今年第二季度投产。新项目的建筑面积超过2万米2,安装一台意大利PMT厂制造的新月型成形器卫生纸机。这台纸机幅宽2.75米,

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简介：2007年8月16日．146°E卫星上的菲律宾梦幻直播系统停掉了包括NHK、Disney、Eurosport、Bloomberg、Australia、TV5Asie等知名频道在内的13个频道。致使原接收NHK频道的国内用户不得不寻找新的信号源，其实NHKWorldPremjum（NHK综合娱乐台）的真正信号源是在166°E国际8号（国际10号上的信号相同）上，其它所有系统所采的信号均是从这里得到的，但因其采用PowerVu方式加密，这种解码器在国内很难买到，

简介：位于阿联酋阿治曼市的Crown造纸厂7月底投产了一台能力为80吨/日的卫生纸机PM2。这台纸机幅宽2．75米，纸机试产非常顺利，准备生产可供出售的卫生纸原纸。新纸机的生产车速将达到1700米，分。这台纸机开机初期全部采用原生纸浆进行生产。由Comer公司提供的一套新的脱墨设备计划于11月投产，届时，纸机生产可选择全部使用或部分使用回用纤维浆料。

简介：哈曼国际工业公司（Harman）中国经销商ACE近期与大连万达集团签署合约，万达集团旗下的万达院线20个影城183张幕（影厅）均采用“哈曼”的JBL音箱和Crown功放设备，将于2010年12月底前完成设备安装。

简介：Thesynthesisofanewtypeofhetero-macrocyclicpolyether2,3-henzo-1,4,7,13-tetraoxa-10-selenacyclopentadeca-2-eneisdeseribed.

简介：Thepredictionofthedistributionofquantitativevariablesinaforeststandisofgreatinteresttoforestmanagers,fortheevaluationofforestresourcesandschedulingoffuturesilviculturaltreatments.TheaimofthisresearchwastomodelthedistributionofquantitativevariablesforQuercuspersicainopenforestsinIran.Toinvestigatetheprobabilitydistributionoftreesinnaturalstands,642treeswereselectedformeasurementusingasystematicrandomsamplingmethod.Selectedtreesweremeasuredanddatawereanalyzed.Gamma,beta,normal,lognormal,exponentialandWeibullprobabilitydistributionswerefittedtotheheightdistributionoftrees.Variablesofdistributionfunctionswereestimatedusingthemaximumlikelihoodestimationmethod.ActualprobabilityandprobabilitywhichderivedfromfunctionswascomparedusingKolmogorov–SmirnovandAnderson–Darlingtests.Beta,WeibullandWeibullprobabilitydistributionsexplainedthedistributionsoftreeheight,DBHandcrownarea.