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1.
0 INTRODUCTIONLetE/Fdenoteafinitedimensionalfieldextension .Anelementx∈EiscalledaprimitiveelementofE/FifF(x) =EwhereF(x)isthesubfieldgeneratedby {x}∪F[1] .ItiswellknownthatifFisfinitefieldGF(pn)and (E :F) =m ,thenEisfinitefieldGF(pnm) ,andGF(pnm) /GF(pn)hasprimitiveelem…  相似文献   

2.
0 INTRODUCTIONIn 1977,F .S .DeBlasi[1] definedthemeasureofweaknoncompactnessforanonemptyboundedsubsetGofaBanachspaceEasfollow :β(G) =inf {r>0|thereexistsaweaklycompactsetCsuchthatG C+Br}whereBr ={x ∈E|‖x‖ ≤r} ,anddiscusseditspropertiesindetail .In 1981,bymeansofmeasureso…  相似文献   

3.
Fuzzy Semi-continuity of fuzzy number-valued function   总被引:2,自引:0,他引:2  
1 PRELIMINARIESInthissection ,werecallsomeknowledgeforthefuzzynumbersinRef.[1].Letu :R1 [0 ,1].uiscalledafuzzynumber ,ifuhastheproperties :(1)uisnormali.e .thereexistsx ∈R1suchthatu(x) =1;(2 )Foranyλ ∈ (0 ,1]thenuλ ={x ∈R1:u(x)≥λ}isaclosedintervaldenotedby [u- λ,u+λ];(3)u0 ={x∈R1:u(x) >0 }…  相似文献   

4.
1 REPRODUCINGKERNELSPACEANDITSREPRODUCINGKERNELForconvenience ,withoutlossofgenerality ,weletD =[0 ,1]× [0 ,1].SupposeH2 ={u(x ,y) | u x, u yarecompletelycon tinuousfunctionsinD , αu xα1 yα2 ∈L2 (D) ,α=α1+α2 ,αi=0 ,1,2 ,i=1,2 } ,foranyu ,v ∈H2 ,wedefineinnerproduct(u ,v) = D(uv+ 2 u x v x + 2 u y v…  相似文献   

5.
0 INTRODUCTIONThispaperisconcernedwithaclassofhigherorderneutraldifferenceequationoftheform Δm(xn pnxτ(n) ) qnxn-σ =0 ,n =0 ,1,2 ,…(1)whereΔistheforwarddifferenceoperatordefinedbyΔxn=xn 1-xn,misapositiveinteger ,{pn}isarealse quence ,{qn}isapositiverealsequence ,{τ(n) }is…  相似文献   

6.
0 INTRODUCTIONLetX1:n ≤X2 :n ≤…≤Xn :nbetheorderedstatis ticsofasampleofsizenfromalogisticpopulationwithpdff(x ;μ ,σ) =1σe- (x- μ) /σ{ 1+e(x- μ) /σ} 2 ,andcdfF(x ;μ ,σ) =1/{ 1+e- (x- μ) /σ} ,   -∞ <x <∞ ,-∞ <μ<∞andσ >0 .Thisdistributionissymmetricalwithlocationparameterμ( =expectationofX)andsca…  相似文献   

7.
1 SIGNORINI′SPROBLEMTheproblemunderstudyreducestominimizingquadraticfunctionalJ(u) =12 ∫Ω| u|2 dΩ- ∫ΩfudΩ (1)ontheclosedconvexsetK ={u∈W12 (Ω) :γu ≥Ψa .e .onΓ} ,(2 )whereΩisaboundeddomainwiththeLipschitzcontinu ousboundaryΓ ,f∈L2 (Ω)andΨ∈L2 (Γ)aregivenfunctionsandγu∈W1/22 (Γ)is…  相似文献   

8.
1 CENTRALIZEDKALMANFILTEREQUA TIONAsystem’sdynamicsaredescribedbythestatetransitionequation[1 ]x(k+ 1 ) =F(k)x(k) +G(k)w(k) ( 1 )wherex(k)isthestatevectorattimek ,F(k)isthesystemmodel,G(k)isthenoisemodel,andw(k)istheinputnoise .Anumberofsensorsareconsideredtotakeobser vat…  相似文献   

9.
1 SETTINGOFTHEPROBLEMANDMAINRE SULTConsiderinitialboundaryvalueproblemofsynopticflowequation ΔΨ t -γΔ2 Ψ R Ψ x ΔΨ y - Ψ ΔΨ ΔΨ x Ψ x =f,(1)Ψ(x ,y ,t) =ΔΨ(x ,y ,t) =0 ,(x ,y ,t) ∈S2 ,T,(2 )Ψ(x ,y ,t) = Ψ n =0 ,(x ,y ,t) ∈S1,T,(3)Ψ(x ,y ,0 ) =0 ,(x ,y) ∈Ω. (4)Here ,nisexteriornormalΓ1,theparametersRandγarep…  相似文献   

10.
0 INTRODUCTIONAsanaturalphenomenon ,earthquakealwayscausesgreatdamagetobuildings .Somedampersareinstalledonthestructuresothatthedampersandthestructureresisttheseismicmotiontogether ,andthisiscalledvibrationcontrol.Fordamperscanabsorbseismicenergy ,thedam …  相似文献   

11.
1 SYNOPSISTOSTATEMONITORINGANDFAULTDIAGNOSISDEVICEOFHOMO AXLECATALYSISCHIEFBLOWERGROUPThispaperfocusesonrecallingaccidentsystem .Be causeitisapartofthewholedevice ,wegiveabriefin troductiontothedevicefirst .ThesaiddeviceisshownasFig .1wherethethickframessh…  相似文献   

12.
INTRODUCTIONLetNbethesetofpositiveintegers ,andletA ,B∈Nwithgcd (A ,B) =1andBsquarefree .Thediophan tineequationA2 x4 -By2 - 1,x ,y∈N ( 1)isakindofbasicandimportantquarticDiophantineequa tions[1] .In 1997,Cohn[2 ] andSunandYuan[3] provedrespectivelythatifA =1thentheonlypossibl…  相似文献   

13.
0 INTRODUCTIONIn [1],GoetschelandVoxmandefined (G) inte graloffuzzynumbervaluedfunctionf:[c ,d]→F .InfactFisL(R)in [2 ].In [2 ]Matlokadefined (M)in tegralanddiscussedsomepropertiesaboutit ,thediscus sionin [2 ]wasbasedontheconclusionthatif {F(t) ,t∈ [a ,b]}isorderlyboundedthe…  相似文献   

14.
0 INTRODUCTIONWehaveknownthatascalingfunction φ(x) ∈L2 (R) ,whichgeneratesamultiresolutionanalysis ,willsatisfytherefinementequation[1]φ(x) =∑k∈Zhkφ(2x -k) (hereZisanintegerset.)(1)Andawaveletfunctionψ(x) ∈L2 (R)canbeobtainedfromtheformula (2 )ψ(x) =∑k∈Z(- 1) k h1-kφ(2x -k) . (2 )Ift…  相似文献   

15.
1 INTRODUCTIONOncommon midpoint (CMP)andcommon shotpoint (CSP)gathers,seismictime distancecurvein (x,t)domaincanbeapproximatedashyperbo  相似文献   

16.
1 IntroductionThequalitativebehaviorofsolutionsoftheGause typebiomathematicalmodeldxdt=φ(x) (F(x) -π(y) )dydt=ρ(y) (ψ(x) ξ(y) )(1 )wasinvestigatedinRef.[1 ],wheretheecologicalmeaningofthismodelwasdiscussed .Somespecialcasesofsystem (1 )havebeenstudiedbymanyauthors[2 5] .Our…  相似文献   

17.
1 REPRODUCINGKERNELSPACEAssumew22 [0 ,+∞ ) ={u(x) |u(x) ,u′(x)areabsolutelycontinuousrealfunctionsandu″(x) ∈L2 [0 ,+∞ ) } ,here ,thedefinitionofinnerproductisasfol lows :   (u ,v) 2 =∫∞0(u(x)v(x) + 2u′(x)v′(x) +u″(x)v″(x) )dx , u ,v∈W22 [0 ,+∞ ) (1)Settingnorm‖·‖ =(· ,·) 1/2 ,itiseasytoprovethatEq .(1)re…  相似文献   

18.
1 Themathematicalformulationofthepro blemDefinition FortwoarbitrarilygivenfinitepointsetsA ={X1,X2 ,… ,Xα} andB ={Xα 1,Xα 2 ,Xα β}inthen dimensionalEu clideanspaceRn,ifthereexistsan (n - 1 ) di mensionalhyperplaneW·X =tsuchthat i∈ [1 ,α],W·Xi≥t; j∈ [α 1 ,α β],W·Xj<t (1 )holds ,t…  相似文献   

19.
0 INTRODUCTIONFindingEnglishBaseNounPhrase (BNP)isanimportantresearchissueinnaturallanguageprocess ing .ItsresolutionwillpavethewayforhighqualityEnglishChinesemachinetranslation .And ,accurateidentificationofBNPisalsocrucialtoinformationre trievalsystem ,in…  相似文献   

20.
CentralSouthUniversity (CSU)isoneofChina′skeyuniversities ,whichisaffiliatedwiththeMin istryofEducation .“JournalofCentralSouthUniversityofTechnology (EnglishEdition)” (ISSN10 0 5 9784 ,CODENJCSTFT ,Quarterly)issupportedbyCSU .Prof.ChenGuoda ,AcademicianofChineseAca…  相似文献   

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