简介:嵌段共聚物聚苯乙烯-b-聚氧化乙烯(PS-b-PEO)甲苯溶液在室温下陈化2个月可形成中间是PEO单晶上下表面为PS具有"三明治"结构的方形片层,并且既能形成单层方形片层,也能形成多层方形片层.采用透射电子显微镜手段观察了这种结构在不同水含量的水/甲苯混合溶剂蒸汽诱导后形成的结构形貌.结果证明在甲苯和水蒸汽中,方形片层结构均能稳定存在,不能进行结构重构;而随着混合蒸汽中水含量的增加,单晶溶解、消失,在甲苯和水的共同作用下,可通过结构重构形成新的垂直或平行于表面的柱状相结构.
简介:Inthispaper,moreefficient,low-complexityandreliableregionofinterest(ROI)imagecodecforcompressingsmoothlowtextureremotesensingimagesisproposed.WeexploretheefficiencyofthemodifiedROIcodecwithrespecttotheselectedsetofconvenientwaveletfilters,whichisanovelmethod.SuchROIcodingexperimentanalysisrepresentinglowbitratelossytohighqualitylosslessreconstructionwithtiminganalysisisusefulforimprovingremotesensinggroundtruthsur-veillanceefficiencyintermsoftimeandquality.Thesubjective[i.e.fair,fiveobserver(HVS)evaluationsusingenhanced3DpictureviewHypermemorydisplaytechnology]andtheobjectiveresultsrevealedthatforfastergroundtruthROIcodingapplications,theSymlet-4adaptationperformsbetterthanBiorthogonal4.4andBiorthogonal6.8.However,thediscreteMeyerwaveletadaptationisthebestsolutionfordelayedROIimagereconstructions.
简介:定义了向量筐函数的C-Stieltjes近似可表示算子,并研究了它的性质。另外,我们定义了向量值函数的近似C-Stieltjes积分,并证明了它的收敛定理。
简介:IntroductionTherecentdiscoveryofaclassofcarboncontainingmoleculesknownasthefulereneshasproducedaseriesofmaterialswithawideran...