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简介：寓言的氡变换广泛地在多重变细被使用了。为了进一步改进氡的精确性和效率，转变，我们开发了高分辨率的氡变换由Abbad基于快、修改的寓言的氡变换介绍了的-f领域。一个新变量的介绍使变换操作员频率无关。因此，我们需要计算变换操作员和它的反的操作员仅仅一次，它极大地改进计算效率。而且，因为primaries和multiples在有在-f域的不同斜坡的直线上是分布式的，我们容易装选择过滤操作符压制multiples。同时，建议方法提供高分辨率的氡变换的优点，它能极大地改进attenuating的精确multiples。数字实验建议multiples很好被压制，primaries的振幅对偏移量特征是维持的井。真实数据处理结果进一步验证方法的有效性和可行性。

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简介：Inmostexitingportfolioselectionmodels,securityreturnsareassumedtohaverandomorfuzzydistributions.However,uncertaintiesexistinactualfinancialmarkets.Marketsareassociatednotonlywithinherentrisk,butalsowithbackgroundriskthatresultsfromthedifferencesamongindividualinvestors.Thispaperinvestigatedthecomplianceofstockyieldstothefuzzy-naturedhigh-ordermomentsofrandomnumbersinordertodevelopahigh-momenttrapezoidalfuzzyrandomportfolioriskmodelbasedonvariance,skewness,andkurtosis.DataobtainedfromtheShanghaiStockExchangeandShenzhenStockExchangewasusedtoassesstheinfluenceontheproposedmodelofbothbackgroundriskandthemaximumlevelofsatisfactionoftheportfolio.Theempiricalresultsdemonstratedthatthedifferencesbetweenthemaximumandminimumvariance,skewness,andkurtosisvaluesoftheportfoliowerepositivelycorrelatedwiththevarianceofthebackgroundrisk.

简介：High／Scope课程又称高瞻课程，由美国儿童心理学家韦卡特（Weikart，D．P．）等人于1962年创立的，开始是用于美国“开端计划”中“处境不利的特殊儿童摆脱贫苦”教育方案，在20世纪80年代以后在世界各地广泛运用。该课程以皮亚杰的儿童认知理论为基础，在逐渐发展的过程中不断走向成熟，它非常注重儿童社会性与情感的发展，目的在于帮助儿童在未来的学习中获得成功。

简介：Thispaperintroducesofthedevelopmentandapplica-tionofheavilyburnedmullitedbrickwithhighreractorinessunderloadlowcreep,whichismadeofandalusiefineandcoarsegrains(asaggregate),highaluminabauxiteproducedinYangquancounty,clayproducedinGuangxiprovine,industrialaluminapowderandsilliman-itepowder(asmatrixmaterial)andalittleamountofad-ditivesandbondedwithsyntheticbond.

简介：利用天然气脱硫厂的酸气、氢氧化钠、对二氯苯和助剂磷酸钠，在六甲基苯磷酰三胺溶剂中，常压下缩聚４～６小时，制备了线型结晶性高分子量聚苯硫醚（ＨＭＷＰＰＳ）。该方法具有的明显优点是：设备简单、容易操作、活性高、溶剂稳定、产品收率高、成本低、适宜于大规模工业生产。

简介：<正>OnNovember12thisyear,JinpingCascadeIHydropowerStation,seatedonthelowerreachesofYalongRiverinSichuanProvince,startedtobeconstructed.ThestationisthesecondlargehydropowerprojecttobeconstructedonYalongRiverfollowingErtanHydropower

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简介：Theusual(1+1)-dimensionalSchwartzBoussinesqequationisextendedtothe(1+1)-dimensionalspace-timesym-metricformandthegeneral(n+1)-dimensionalspace-timesymmetricform.TheseextensionsarePainlevintegrableinthesensethattheypossessthePainlevproperty.Thesinglesolitonsolutionsandtheperiodictravellingwavesolutionsforarbitrarydimensionalspace-timesymmetricformareobtainedbythePainlev-Bcklundtransformation.

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简介：TheperformancesofhighpowerEr/Ybcodopedfiberlinearcavitylasersareinvestigatednumerically.ThenumericalanalysisisbasedontheiterativesolutionofrateequationsforpopulationdensityoftheEr/Ybions.Thebehaviorsofco-pumpandcounter-pumpmethodsarecontrasted.Dependenceofoutputpoweroninputpumppower,outputreflectivity,operatingwavelengthandactivefiberlengthissimulated,respectively.HighconversionefficiencyEr/Yblaseroutputisobtainedinsimulationsandexperiments.

简介：Coherentdiffractionimaging(CDI)andptychographytechniquesbypassthedifficultyofhavinghigh-qualityopticsinX-raymicroscopybyusinganumericalreconstructionoftheimagethatisobtainedbyinvertingthediffractedintensityrecordedbyacharge-coupleddevicearray.However,thereconstructionoftheimagefromtheintensitydataobtainedfromaweaklydiffractingspecimenisknowntobedifficultbecauseoftheobviousreductioninsignal-to-noiseratio(SNR).Inthiscase,thespecimenonlyslightlymodifiestheprobediffractionpattern,resultingindifficultyintheidentificationofthedetailedstructureofthespecimenfromthereconstructedimagebecauseofthepoorcontrastandsharpnessoftheimage.Toaddressthissituation,amodificationintheimageretrievalalgorithmsusedintheiterativereconstructionoftheimageissuggested.Thismodificationshoulddoublethepresenceofhighspatialfrequenciesinthediffractionpatterntoenhancethecontrastandedgedetectioninexistingimagingtechniques.

简介：Inthispaper,ahybridadaptivecompensationcontrolschemeisproposedtocompensatethefrictionoccurrenceandothernonlineardisturbancefactorsthatexistinthehigh-precisionservosystem.Anadaptivecompensationcontrollerwithadual-observerstructureisdesigned,whiletheLuGredynamicfrictionmodelwithnon-uniformparametricuncertaintiescharacterizesthefrictiontorque.Consideringtheinfluenceoftheperiodicdisturbancetorqueandparametricuncertainties,fuzzysystemsandarobusttermareemployed.Inthisway,thewholesystemcanbetreatedasasimplelinearmodelafterbeingcompensated,thentheproportional-derivative(PD)controllawisappliedtoenhancingthecontrolperformance.OnthebasisofLyapunovstabilitytheory,theglobalstabilityandtheasymptoticconvergenceofthetrackingerrorareproved.Numericalsimulationsdemonstratethattheproposedschemehaspotentialstorestraintheimpactofdisturbanceandimprovingthetrackingperfor

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简介：AfterhavingevaluatedvariousH.323productsforthesetwoyears,KEKandJapaneseHENPcommunitystartedtomovefromISDN(H.320)-basedvideoconferencingenvironmentintoIP(H.323)-basedone.PrimaryreasonforthemoveistocutdowntheeverincreasingISDNcommunicationcost.AtthesametimetheH.323canofferusmorepowerfulcollaborativeenvironment.InordertomakeKEKtobeacenterfortheH.323-basedcollaborativeenvironmentinJapan,PictureTel'sLIVEGATEWAYasaH.320/H.323gateway,whichisessentialforthesmoothtransition,CiscoIP/VA3510asaH.323/MCU,andCisco2610asagatekeeperwereinstalledatKEKinMarch2001,Andthetransitionstarted.Inthispaper,we'lldescribethecollaborativeenvironmentwhichouruserscanhave,togetherwithitsoperationalresults.

简介：Thefatiguebehaviorofahighstrengthsteel300Minthegigacycleregimewasinvestigated.Fullyreversedtension-compressionfatiguetestsatambienttemperaturewereperformedusinganultrasonicfatiguesystemoperatingat20kHz.Thestaircasetestmethodwasemployedtoobtainaccuratevaluesofthemeanfatiguestrengthcorrespondingtofixednumbersofcyclesupto10~9.Theseresultswerecomparedtothecurvewhichisestimatedbythedatatestedinthemid-longliferegimeonconventionalservohydraulictestmachineat20Hz.Resultsindicatethatthefatiguestrengthdeterminedfromultrasonicfatiguetestingislightlyhigherthanconventionaltestingintherangeof10~6-10~7cycles.Itisobviousthatnucleationsoffracturestendtooccurbelowthesurface,iffractureshappenaftermorethan10~7cycles.AllthefracturedspecimensfailsfrominternalSiO_2inclusionsorsmallercarbidesandcarbideclusters.

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