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简介：Bambooasanimportantbiologicalresourcehasbecomeanalternativetowoodgradually,butthevariationinmechanicalpropertiesleadstodifficultyinitsusetosomeextent.Sodeepunderstandingofthenatureinbambooisneededtosatisfytheutilizationeffectively.Aswehaveknown,thedensityisoneofmechanicalpropertiesofbamboo.Therefore,thispaperstudiedthevariationinbamboodensitywiththeweighingmethod.Theresultsshowedthatthedensitydecreasesgraduallyfromtheoutertotheinn...

简介：Thecharacteristicsofalaminarwalljetsubmittedtodifferentconfigurationshavebeenexperimentallyexploredinordertoobtainabetterknowledgeoftransitionmodifications,Infactdifferentparameterscanaccelerateordelaythetransitionusingasmoothorroughsurface,heatedornot,submittedtovibrationsornot.Inthisstudy,significanteffectscanbenoticed.Ithasbeenpossibletomeasurethebeginningofgrowthratesofdisturbanceamplitudeusingawindtunnelandcomparingtheresultswiththelinearstabilitytheory.

简介：Theexactclassicallimitsforthecoefficientofvariationcforthenormaldistributionarederived.Thehand-calculatingapproximatedclassicallimitsforchavinghighaccuracyaregiventomeetpracticalengineeringneeds.UsingOdehandOwen’scomputationalmethodandBrent’salgorithm,thetablesforther-upperexactclassicallimitsofcoefficientofvariation.fornormaldistributionarecalculatedforthedifferentconfidencecoefficientγ,thesamplesizen=I（1）30,40,60,120,thesamplecoefficientofvariation（?）=0.01（0.01）0.20.Itisshownthatifn≤8,（?）≤0.20,thentheY-upperexactclassicallimitscuforcareslightlyhigherthantheexactfiduciallimitscu,Fforc.ifn>8,（?）≤0.20,thencu-cu,F<5×10-6.

简介：这篇文章讨论北方大西洋摆动(NAO)和诺思太平洋摆动(NPO)的interannual变化，它与在与气候被联系的中国的interdecadal气候变化的关系在1960鈥檚在北半球跳，用数据分析。两个都，NAO和NPO的振幅在1960鈥檚显然增加，这清楚地被显示出，摆动的主要时期在1960鈥檚前从3-4年改变到8鈥?在1960鈥檚以后的5年。因此，在中国的interdecadal气候变化或气候在1960鈥檚跳仔细与NAO和NPO的异例有关。关键词诺思大西洋摆动(NAO)-诺思太平洋摆动(NPO)-气候跳-Interdecadal气候变化这个工作被国家关键基本科学节目在中国(G1998040903)支持，科学的中国学院和中国(资助No.49823002)的国家自然科学Fundation。作者对为打手稿的王璇女士也感激。

简介：Thegeneticimprovementofwoodpropertiesisoneoftheimportantmeasuresofimprovingwoodquality.Toachievethat,forestryandwoodscientistshavedoneagreatdealofresearchinexpectationtoproducemorehigh-qualitywood.Thepapersummarizestheresearchesongeneticvariationandgeneticcorrelationofwoodpropertiesandproposestheprospectstoconductthegeneticimprovementofwoodproperties.

简介：体积变化是影响木材处理的一个无常元素。我们学习了优秀缺点在传统的木材处理引起并且建立了一条优化途径的木头的体积变化，用一个柔韧的优化方法。我们使用了生产学习在板厚度和原料日志之间的关系的可接受的板的全部的数字，用控制改进板的输出，减少副产品的数量，并且降低生产费用的板体积的变化的一个启发式的搜索算法。柔韧的优化方法能有效地在木材处理控制体积变化的影响，远及增长处理的可能的使用减少切的废物并且增加利润，最大化木材的利用比率，在处理阻止废物，栽培树种类的生产类型并且节省森林资源。

简介：Studiesonbrain-evokedpotentialandcontingentnegativevariation(CNV)inmooddisorderremaincontroversial.Todate,noCNVdifferencebetweenunipolarandbipolardepressionhasbeenreported.Brain-evokedpotentialsweremeasuredinthepresentstudytoanalyzeCNVinthreesubtypesofmooddisorder(mania,unipolardepression,andbipolardepression),andtheseresultswerecomparedwithnormalcontrols.Inthemaniagroup,CNVamplitudeBwasgreaterthanincontrols,andthedepressiongroupexhibitedlowerCNVamplitudeBandsmallerA-S'2area,andprolongedpost-imperativenegativevariationlatency.TheCNVcomparisonbetweenunipolarandbipolardepressionfoundthattheprolongedpost-imperativenegativevariationlatencywasonlyinunipolardepression.Theseresultssuggestthatprolongedpost-imperativenegativevariationlatencyisacharacteristicofunipolardepression,andCNVamplitudechangeisastatecharacteristicofmooddisorderpatients.

简介：Knowledgeoftheevolutionofpathogensisofgreatmedicalandbiologicalsignificancetotheprevention,diagnosis,andtherapyofinfectiousdiseases.InordertounderstandtheoriginandevolutionoftheSARS-CoV(severeacuterespiratorysyndrome-associatedcoronavirus),wecollectedcompletegenomesequencesofallvirusesavailableinGenBank,andmadecomparativeanalyseswiththeSARSCoV.GenomicsignatureanalysisdemonstratesthatthecoronavirusesalltaketheTGTTastheirrichesttetranucleotideexcepttheSARS-CoV.Adetailedanalysisoftheforty-twocompleteSARS-CoVgenomesequencesrevealedtheexistenceoftwodistinctgenotypes,andshowedthattheseisolatescouldbeclassifiedintofourgroups.OurmanualanalysisoftheBLASTNresultsdemonstratesthattheHE(hemagglutinin-esterase)geneexistsintheSARS-CoV,andmanymutationsmadeitunfamiliartous.

简介：ThecharacteristicsandpossiblephysicalmechanismofinterdecadalvariationoftheintensityoftheSouthAsianHigh(SAH)insummerareanalyzedusingtheNCEP/NCARreanalysisdataandNOAAextendedreconstructedseasurfacetemperature(SST)data.Theresultsindicatethataremarkableinterdecadaltransitionoccurredinthelate1970sthatincreasedtheintensityofSAH,or,anabruptclimatechangewasaround1978.AcomparativeanalysisbetweentheweakandstrongperiodoftheSAHintensityshowsthattherelatedanomalouspatternsoftheatmosphericcirculation(includingwindfield,airtemperaturefieldandverticalvelocityfield)arenearlyoppositetoeachother.Thesurfacelatentheatfluxanomaliesovertheplateau(especiallyinthenorthwestoftheplateau)insummerexertgreatinfluenceontheinterdecadalvariationoftheSAHintensityandthesurfacesensibleheatfluxanomaliesplayamoreimportantrole.ConsistentwiththeinterdecadalvariationoftheSAHintensity,themonopolemodeofthetropicalIndianOceanSSTinsummeralsoexperiencedalowtohightransitioninthelate1970s.Tosomeextent,thiscanrevealtheimpactoftheanomalousmonopolemodeofthetropicalIndianOceanSSTinsummeroninterdecadalvariationoftheSAH.

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简介：A6-layer,4°×5°horizontalresolutionglobaloceanmodelhasbeendesignedandimproved.Aftera100-yearin-tegration,anequilibriumstatehasbeenreachedfromtheuppertolowerlayers.Bytakingthemeanstateoflastl0mod-elyearsasclimaticstate,weanalyzedthecharacteristicsoftheseasonalvariationinourmodelintegration.Theresultsshowthatthesimulatedseasonalvariationissimilartotheobserved.Sothedesignofourmodelissuccessful.Then,us-ingthesimulatedclimaticstateoftheseasonalvariationastheinitialstate,andtheobservedstressandthermalstateastheatmosphericforcing,wesimulatedtheprocessofElNinoin1972—1973successfully.Thesimulatedresultsofsea-sonalvariationusingourmodelwillbepresentedinpartI.

简介：Duetothegrowingconcernabouttheagriculturalphosphorus(P)lossespollution,anin-depthunderstandingofPinpaddysoilsofChinawouldbehelpfulinprovidinganationalperspectiveoftheenvironmentalimpactofPcyclingandfertilityonChina'sfarms.Inthisstudy,weevaluatedthePstorageandthePdensityofpaddysoilsinChina,characterizedthespatialvariationsofPamongthesubgroupsofpaddysoilsandsoilregionsinChina,andevaluatedthePdatausingGIS-basedanalysis,whichincludedanewlycompiled1:1000000digitalsoilmapofChina,andusing1490soilprofiles.TheavailableandtotalPdensitiesofpaddysoilswere6.7and698.5gm-3,respectively.OverallinChina,thetotalPstoragewithin1mofpaddysoilswasestimatedtobe330.2Tg.ThePdensityofpaddysoilsvariedsubstantiallywithsubgroupsduetothedifferentsoilwaterregimessuchasgroundwatertableandsoildrainage.ThePavailabilityinpaddysoils,especiallyinsurfacelayer,washigherinhightemperatureandprecipitationareas.Furtherresearchisneededtoexaminemoreanthropogenicimpactfactors,suchasincreasinguseofchemicalfertilizer.

简介：ByusingtheobservationalO3dataofKunmingandHongKongduringtheperiodof1997-2001,thepaperstudiesthedistributionandvariationoftotalozoneinlowlatituderegionofChina.ThestudyshowsthatthecharacteristicsofvariationinKunmingandHongKongareverysimilar,andthetotalozoneinthewesternareasislargerthanintheeasternones.Itismaximuminsummerandminimuminwinter.

简介：Microfibrilangle(MFA)inChinesefirwastestedbyX-raydiffractionapparatusandcalculatedbycomputersoftware.Theresultswereasfollows:MFAwascontrolledstronglybyinheritance,andtherewasnosignificantdifferenceinMFAamonginterspecies,juvenileandmaturewood.Inthelongitudinal,MFAreduceswiththeheightrisingfrom0to5.5m,especiallyintheheightsfrom0to1.5m.ThevaluesofMFAarenearlyconsistencefrom1.5to7.5m.Thevariationrangewasbetween10.82oand12.57ofrom1.5to7.5m,R2ofpowerequationachieved0.9321,andanalysisofvarianceindicatedthatthevariationofMFAwasnotsignificantfrom1.5to7.5m.TheageofthetreeshadanimportantinfluenceonMFA,consequently,thedifferenceinMFAwassignificantamongannualringsinradial,whichwasmaximalinnearpithandreducedrapidlyfromthepithtosapwood,anditsdeclinetendencywasslowbeyondtheninthannualring.MFAreachedminimumvalueatthe15thannualring,andthedifferencereachedmorethan20oandR2ofbinomialequationachieved0.7556.

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简介：ＭｏｄｅｌｌｉｎｇｔｈｅＩｎｔｅｒａｎｎｕａｌＶａｒｉａｔｉｏｎｏｆＲｅｇｉｏｎａｌＰｒｅｃｉｐｉｔａｔｉｏｎ　ｏｖｅｒ　ＣｈｉｎａＷａｎｇＨｕｉｊｕｍ（王会军）（ＬＡＳＧ，ＩｎｓｔｉｔｕｔｅｏｆＡｔｍｏｓｐｈｅｒｉｃＰｈｙｓｉｃｓ，ＣｈｉｎｅｓｅＡ...

简介：全部的变化(电视)最小化问题广泛地在图象恢复被学习。尽管许多其他的方法为它的答案被建议了，牛顿方法由于没有集中为最初的明确的表达仍然保持不可用。由禅宗，周和禅宗的以前的研究[15]认为一个规则化参数继续想法与一些成功而是没有柔韧的参数选择增加牛顿方法的集中的领域计划。在这份报纸，我们为一样的最初的电视明确的表达考虑一个homotopy方法并且建议使用曲线追踪适应地选择规则化参数。结果，这个想法帮助实质地在高效地解决TVEuler-Lagrange方程改进以前的工作。一样的想法也象deblurring问题一样为二个另外的方法被考虑，再与获得的改进。数字实验证明我们的新方法为图象恢复柔韧、快，甚至为有大noisy-to-signal比率的图象。

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