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1.
Qu Yan |hui Non |linear Scientific Center Wuhan University Wuhan Hubei China 《武汉大学学报:自然科学英文版》2003,8(1):5-8
Forstudyingthedimensiontheoryofdynamicalsystem ,PesinintroducedCarath啨odorystructure(C structure)whichleadstothegeneralizationsofbothclassicaldimensionsandtopologicalpressures;HeconsideredtwotypicalC structureswhichconnectsrespectivelytheopencoveringand… 相似文献
2.
ItiswellknownthattheBergman ,Carath啨odory ,KobayashiandEinstein K hlermetricsarefourclassicalinvariantmetricsincomplexanaly sis .TheBergmanmetric(denotedbyB)wasintro ducedbyBergmanforone[1] in 192 1orseveralvari ables[2 ] in 1933.Carath啨odoryintroducedtheinvari antdistancein 192 6 [3] andReiffenintroducedthein variantmetricin 196 3[4 ] ,thereforetheCarath啨odorymetric (denotedbyC)isalsocalledCarath啨odory Reiffenmetric .TheKobayashimetric (d… 相似文献
3.
IntroductionAminoacylase (N acylaminoacidamidohydrolase .EC 3.5.1.14 ) ,whichexistsinmammaliankidneysandmicroorganisms ,catalyzesthereversiblehydrolysisofL acylaminoacids[1] .Theenzymeisdimericwitharelativemolecularwassof86 0 0 0 ,containingoneZn2 ionpersubunitwhichis… 相似文献
4.
IntroductionChinaisthesecondlargeInternetmarketinAsia .Wearenowseeingmoree stores ,e banksande trading .InternationalDataGroupexpectse commercesalesof$ 3.8billionby 2 0 0 3.Theincreaseincomputerpenetration ,loweredphonechargesandinternet accessfeeswillleadtohighe… 相似文献
5.
Introduction Since 196 0 s ,withthedetailedstudyoftransformationalgen erativegrammar,Englishteachinghasgraduallyabandonedthemechanicpatterndrillsusedinaural oralmethodin 195 0 s,andfocusedondevelopingstudents communicativecompetence .MoreandmoreEnglishteacher… 相似文献
6.
Fiber Migration and Distribution of Twist at Different Radial Positions of Rotor Yarn-by Hi-Scope Video Microscope System 总被引:2,自引:0,他引:2
BackgroundIntheearly 195 0s,MortonandYen[1] developedthefibertracingmethodintheyarn .Theymixedsomedyedfibersintoyarnbeforecarding ,anddippedtheyarninachemicalreagentwithsimilarrefractiveindextoobservethedyedfibersintheyarnunderthemicroscope .Theconceptoffibe… 相似文献
7.
0 IntroductionCalixarenesandtheirderivativeshaveattractedgreatinterestinhost guestchemistry .Theyarenotedfortheirabilitytoformhost guestcomplexesbytrappingorganiccompounds,smallions ,andgasesintheirtoruslikecavitiesaswellastomimicenzymefunctions[1] .Theyca… 相似文献
8.
0 IntroductionMP 1 1isobtainedfrompepsindigestionofcytochromec .Itretainsaminoacidresidues 1 1 2 1ofcytochromec .Itisconsideredagoodmodelofc typehemeenzymesandperoxidases .Sofar,somemethodshavebeenusedtoimmobilizeMP 1 1onelectrodes ,suchasmixingupwithgraphitepast… 相似文献
9.
Yang Yan He Chu Liao Ya |li Cao Yang Qin Qian |qing .School of Electronic Informatio n Wuhan University Wuhan Hubei China .The State Key Laboratory of Cartographical Remote Sensing Information Engineering Wuhan Univer sity Wuhan Hubei China 《武汉大学学报:自然科学英文版》2003,8(1):74-76
0 IntroductionLiftingschemeasintroducedbyW .Sweldens[1] in 1996 ,isanewwayofconstructingwavelettransformthatnotnecessarilybasedontranslatesanddilatesofonefunction .LiftingallowstheconstructionofwaveletsentirelyinthespatialdomainwithoutmakinguseoftheFouriertr… 相似文献
10.
Motion Tracking with Fast Adaptive Background Subtraction 总被引:3,自引:0,他引:3
Xiao De |gui Yu S heng |sheng Zhou Jing |li School of Computer Science Technol ogy Huazhong University of Science Technology Wuhan Hubei China 《武汉大学学报:自然科学英文版》2003,8(1):35-40
0 IntroductionInanintelligentvideosurveillanceandmonitoringsystem ,oneofthemostcomplexandimportanttasksisrealtimeextractingandtrackingmotionobjects .Ingeneral,thereexisttwomethodsforextractionnamedasforegroundextractionandbackgroundsubtraction ,respectiv… 相似文献
11.
Yao Duan |zheng Xiong Gui |guang School of Physics Techno logy Wuhan University Wuhan Hu bei China 《武汉大学学报:自然科学英文版》2003,8(1):51-53
0 IntroductionThird harmonicgeneration (THG )imaginghasbeendemonstratedrecentyearsinbiologicaltissues[1,2 ] .OnedistinctadvantageofTHGimagingcomparingwithfluorescenceimagingisthatitcanproceedwithouttheneedtolabelthebiologicaltissueswithappropriateprobes .And… 相似文献
12.
废水生物处理工艺简易优化方法 总被引:1,自引:1,他引:0
Inthepast 30years ,USAChemicalAbstractcited 1 6paperswhichconcernoptimizationofbio logicaltreatmentprocessonlyinconventionalwastewater[1,2 ] .Buttherearethousandsofkindsofhaz ardousorganicwastewaterintheworld .Evenifsomecompaniescanoffertheoptimizationprocess ,… 相似文献
13.
Li Xi Liu Yi Deng Feng |jiao Qu Song |sheng . College of Chemistry Molecular Sciences Wuhan University Wuhan Hubei China . College of Life Sciences Wuhan University Wuhan Hubei China . State Key Lab of Advanced Technology for Materials Synthesis Processi ng Wuhan University of Technology Wuhan Hubei China 《武汉大学学报:自然科学英文版》2003,8(1)
0 IntroductionSeleniumpresentsanutritionconundrumthroughitsdualstatusasanessentialandhighlytoxicnutrient.Fromearlyinthiscentury ,seleniumhasbeenknowntocausetoxicityinanimalsproducingconditions ,suchasblindstaggersandalkalidisease[1] .In 195 7,SchwardzandFoltz… 相似文献
14.
Li Jia |chun Li Z hi |tang School of Computer Science Techno logy Huazhong University of Science Te chnology Wuhan Hubei China 《武汉大学学报:自然科学英文版》2003,8(1):46-50
0 IntroductionTheexplosivedevelopmentofInternethasmadeitssecurityaninternationalfocus.Intrusiondetectionhasbecomeanimportantfieldofresearchbecauseofinexistenceofcompletely securesystem .Today ,manyIDSsuserule basedexpertsystemtodetectintrusion ,theyencode… 相似文献
15.
Cao Xiao |yu Cai Nai |cai Wang Y u |ling Xie Ling |ling College of Chemistry Molecular Sciences Wuhan University Wuhan Hubei China 《武汉大学学报:自然科学英文版》2003,8(1)
0 IntroductionThemethodofmineralizingorganictoxicantsinthewastewaterbygenerating·OHradicalshasbecomefocusofchemicaltheoriesandtechnicalresearchesintheenvironmentprotection[1] .Because·OHradicalisastrongoxidizerwithstandardpotentialof2 .80V ,withit,thestable… 相似文献
16.
IntroductionTheannualincreaseofnonwovenfabricsproductionisabout2 0 %[1] ,whichisthehighestinthefieldoffabricproducts.Themostpopularfibersofnonwovenfabricsarepolyethylenetereph thalate (PET) ,polypropylene (PP) ,polyvinylalcohol (PVA )andNylon .BecausePETandPPbelon… 相似文献
17.
Wang Yan L i Chu |lin Lu Jia |hua .Department of Mathematics Huazhong University of Science Technology Wu han Hubei China . College of Mathematics Statistics Wuhan University Wuhan Hubei China 《武汉大学学报:自然科学英文版》2003,8(1):9-14
0 IntroductionInthispaper,wedonotaddressproblemssuchashowfirmsmanagetoimplicitlyorexplicitlycoordinatetheirresearchef fortsandhowtheresearchinformationissharedbytheparticipatingfirms (seeRef.[1,2 ]) .Instead ,wewanttoinvestigatehowfirmsdeterminetheirresearch… 相似文献
18.
ThebandgapofSi-baseSi1-xGexalloycanchangealongwithcontentxandstrain ,thepeakwavelengthofphotodetectorsfabricatedbyusingthismaterialscanbemodulatedaccord inglyfrom 0 .8μmto 1 .6 μm .Si-baseSiGeinfrareddetectorsarecompatiblewiththeSiverylarge -scaleintegrated (VLS… 相似文献
19.
Weconsiderthemodelinnondimensionalformasfollowing ,whichisconcernedin [1] x =x(1-x) - p(x) y+b∫+∞0 f(s) y(t-s)ds y =y(δ- βyx)x(0 ) >0 ,y(0 ) >0 Weapplyanovelmethodforprovingtheglobalstability .LetX→ f(X) ∈RnbeaC1functionforXinanopensetD Rn.Considerthedifferentialequation X =f(X) (1.1… 相似文献
20.
Wu Da |wei Peng Li |li Lu Ning Peng You |gui .Wuhan University Honor Advanced Material Company Wuhan Hubei China .School of Physics Technology Wuhan University Wuh an Hubei China 《武汉大学学报:自然科学英文版》2003,8(1)
0 IntroductionC3N4 isanewlydevelopedsuperhardcoatingmaterial.Itwaspredictedbytheorytohaveahardnessthatcanbecomparabletoorevenexceedingthatofdiamond[1 4 ] ,whichcausestheattentionofmanyscientists.Fujimoto[5] depositedC3N4 coatingsonWCsubstratesbyIonAssistedDyna… 相似文献