简介：Wecharacterizepolynomialgrowthofcosinefunctionsintermsoftheresolventofitsgeneratorandgiveanecessaryandsufficientconditionforacosinefunctionwithaninfinitesimalgeneratorwhichispolynomiallybounded.

简介：在一份以前的报纸，一些特别multistep余弦方法被构造因为能线性地以一个稳定、明确的方法集成，它证明了很有效秒顺序的生硬问题及时。在现在的纸，为这种类型的一般方法的稳定性被给保证的条件，以及回声的彻底的研究并且为对称的过滤(它在另一份报纸，被证明了在Hamiltonian波浪方程关于invariants的保存很有益地表现)。这里被给的，是在提及的方面分析并且对待任何这种类型的方法的一个系统的方法。

简介：Inthispaperweobtainedgeneralrepresentationformulaeforstronglycontinuouscosineoperatorfunctionsviaprobabilisticapproach,whichincludeWebb’s[1]andShaw’s[2]formulaeandsomenewoneasspecialcases.Wealsogivethequantitativeestimationsforthegeneralformulae.

简介：ThispaperintroducestheconceptoflocalC-cosins-familyandinverstigateitsbasicproperties,Inparticular,acharacterizationofthecompleteinfinitesimalgeneratorofalocalC-cosinefamilyisobtained,AsanapplieationofthistheorytothesecondordersbstractCauchyproblems,acharacterizationofthelocalC-well-posednessoftheseproblemsisgivenintermsofthelocalC-cosinefamilytheory.

简介：Fabricpatterncontainsmanytypesoftheavailablepatternelements,whichnotonlycanbeusedfortheresearchers,butalsoasthematerialforthedesigner.Butexistingmethodfocusonthecompleteimageretrieval,thereforelackmethodsofretrievingpatternelements.Thisarticleproposesapatternelementsretrievalalgorithmbasedoncosinetransform.Firstly,automaticallysegmentthepatternsaccordingtosizeandlocationandfilterthesimilarprimarypatterns,then,throughcosinetransform,analyzeelementsfeaturesinDCTdomain,extractamplitudefrequencyandphasefrequency.Weemploy2-normtomeasurethesimilarity,search10similarpatternelementsinthesamplelibraryandsavetheminthedesignresourceslibrary.Experimentresultsindicatethatthisalgorithmperformswellwhileusedinpalacecostumeandcarpetpatterns,andgotmorethan75%oftheaveragerecallin100timesexperiments

简介：Watermarkingisatechniqueforlabelingdigitalpicturesbyhidingsecretinformationintoimages.Watermarkembeddingisamethodtodiscourageunauthorizedcopyingandidentifytheownerordistributorofdigitaldata.Inthispaper,anewmethodisproposed.Thewatermarkisprocessedasavisuallyrecognizablepattern-binaryimage,whichincludesmoreinformationthanthetraditionalsymbolorIDnumberandis"extracted"insteadofonly"detected"tocharacterizetheowner.Thewatermarkishiddeninthehostimagebyselectivelymodifyingthemiddle-frequencypartofthehostimageinconjunctionwiththehumanvisualsystem(HVS)andtheimagediscretecosinetransform(DCT).Theexperimentalresultsshowthatthismethodcansurviveimagecroppingandimagecompression,andgetbetterresults,thisisalsoaprospectivemethod.

简介：Anovelcharged-particlevelocityfilterforslowpositronbeamhasbeensuccessfullybuiltandtested.Itisapuremagneticsystemcomposedofthreemagneticfields,twoofthemarepuredipolemagneticfieldsgeneratedbytwosymmetricallyputcosinecoils.Thephysicalprincipleandtheperformanceofthecosinecoilsarereviewed.

简介：我们这里学习新修改双余弦的L1集中三角法为两倍余弦的L1集中加并且获得一个新必要、足够的条件三角法的系列。另外，结果由Moricz获得了[1]，[2]是我们的特别盒子。

简介：在本文中，我们定义了Ｃ－ｃｏｓｉｎｅ算子函数的Ａｂｅｌ遍历性与Ｃｅｓàｒｏ遍历性，讨论了Ｃ－ｃｏｓｉｎｅ算子函数这两种遍历性的相互关系及基本性质，得到了其强Ａｂｅｌ遍历性在Ｒ（Ｃ）稠时的完全刻划．此外，我们还讨论了Ｃ－ｃｏｓｉｎｅ算子函数的轨道遍历性，并借助于Ｋ－泛函，给出了Ｃ－ｃｏｓｉｎｅ算子函数在０点以非最优化速率收敛的一个充要条件．

简介：Inthispaperthedesignproblemofperfect-reconstructioncosine-modulatedQMFbankshasbeenformulatedasaquadratic-constrainedleast-squares(QCLS)minimizationprobleminwhichallconstrainedmatricesoftheQCLSoptimizationproblemaresymmetricandpositivedefinite.AcostfunctionwhichisaconvexfunctionofdesiredprototypefiltercoefficientsisconstructedsothatthiskindofQCLSoptimizationproblemscanbeefficientlysolved.Soaglobalminimizerofthisproblemcanbeeasilyobtained.Resultsoftwodesignexamplesarepresentedtosupportthederivationsandanalyses.

简介：Basedonsineandcosinefunctions,thecompactlysupportedorthogonalwaveletfiltercoefficientswitharbitrarylengthareconstructedforthefirsttime.When/N=2k-1andN=2k,theunifiedanalyticconstructionsoforthogonalwaveletfiltersareputforward,respectively.ThefamousDaubechiesfilterandsomeotherwell-knownwaveletfiltersaretestedbytheproposednovelmethodwhichisveryusefulforwavelettheoryresearchandmanyapplicationareassuchaspatternrecognition.

简介：ThispaperfocusesonanewrectangularwaveguidegratingSlow-WaveStructure(SWS)withcosine-shapedgroovesandstudiesthepropagationcharacteristicsofthewaveintheSWS.Byusingtheapproximatefield-matchingconditions,thedispersionequationandthecouplingimpedanceofthiscircuitareobtained.Thedispersioncurvesandcouplingimpedancesofthefundamentalwavearecalculatedandtheinfluencesofthevariousgeometricaldimensionsarediscussed.Theresultsshowthatthebandwidthofthecosine-shapedgrooveSWSismuchwiderthanthatofrectangular-shapedgrooveone.Andreducingthegroovewidthcanbroadenthefrequency-bandanddecreasethephase-velocity,whileincrementofthegroove-depthcanalsodecreasephase-velocity.Forabovecases,thecouplingimpedanceismorethan16Ω.ThepresentanalysiswillbehelpfulonfurtherstudyanddesignoftheRFsystemsusedinmillimeterwaveTravelingWaveTube(TWT).

简介：Inthispaper,weshowthatnewmodifieddoublecosinetrigonometricsumsintroducedin[1]areinappropriate,theclassofdoublesequencesJdintroducedthereisunusableforsuchsumsandconsequentlytheresultsobtainedinitarecompletelyincorrect.WehereintroduceappropriatemodifieddoublecosinetrigonometricsumsmakingtheclassJdusableconsideringaparticulardoublecosinetrigonometricseries.