简介:AlinearizationattackontheKeyStreamGenerator(KSG)ofthemodifiedE0algorithmproposedbyHermelin[ProceedingsofICISC'99,SpringerLNCS1787,2000,17-29]isgiveninthispaper.TheinitialvaluecanberecoveredbyalinearizationattackwithO(260.52)operationsbysolvingaSystemofLinearEquations(SLE)withatmost220.538unknowns.FrederikArmknecht[CryptologyePrintArchive,2002/191]proposedalinearizationattackontheKSGofE0algorithmwith0(270.341)operationsbysolvinganSLEwithatmost224.056unknowns,sothemodificationproposedbyHermelinreducestheabilityofE0toresistthelinearizationattackbycomparingwiththeresultsofFrederikAnnknecht.
简介:ThepreparationofPT/PEK-cfilmsisreportedaswellastheirdielectricandopticalproperties.Thec-axisorientationratioofthefilmsis68%.Dielectricconstantandlossfactorat10kHzisabout4.023F/mand0.003,respectively.Therefractiveindicesofthefilms,neandno,are1.6573and1.6278at0.63μmwavelength,respectively.Theopticalband-gapofthefilmwithathicknessof2.33μmisfoundtobe3.06eV
简介:研究表明含氟气体的性质决定了原子氟(F)的转化效率,通常在CxFy气体中x的值越大,氟(F)的转化效率也就会越高。所以C3F8(八氟丙烷)比C2F6(乙氟烷)具有更高的利用效率,更少的PFC(全氟化物)的排放。文章主要研究在以四乙氧基硅烷(TOES)为基础的离子增强化学气相沉积(PlasmaEnhancedChemicalVaporDeposition,PECVD)的清洗制程中,利用分解效率高的C3F8气体取代C2F6气体。通过实验设计(DesignOfExperiment,DOE),调整腔体压力、射频(RF)功率、气体流量等参数,最终得到最优化的新清洗配方。应用到实际的量产中,有效地降低了成本,减少了PFC的排放。
简介:Dempster-Shaferevidencetheory(DStheory)iswidelyusedinbrainmagneticresonanceimaging(MRI)segmentation,duetoitsefficientcombinationoftheevidencefromdifferentsources.Inthispaper,animprovedMRIsegmentationmethod,whichisbasedonfuzzyc-means(FCM)andDStheory,isproposed.Firstly,theaveragefusionmethodisusedtoreducetheuncertaintyandtheconflictinformationinthepictures.Then,theneighborhoodinformationandthedifferentinfluencesofspatiallocationofneighborhoodpixelsaretakenintoconsiderationtohandlethespatialinformation.Finally,thesegmentationandthesensordatafusionareachievedbyusingtheDStheory.ThesimulatedimagesandtheMRIimagesillustratethatourproposedmethodismoreeffectiveinimagesegmentation.
简介:本文叙述了660MW中间再热机组强制循环汽包炉的炉本体采用盐酸清洗、采用磷酸和多聚磷酸盐进行漂洗钝化的清洗工艺方法.其特点在于:为减缓金属腐蚀,必需严格控制清洗工艺配方.通过缓蚀剂对比小型试验探索出:在酸洗配方和水冲洗过程中,添加适量的异抗坏血酸钠还原剂可以抑制三价铁离子对金属的腐蚀,并可避免因水冲洗时间过长而产生二次锈蚀.该工艺实际应用后效果良好,金属腐蚀速率及腐蚀总量均显著小于(DL/T794-2001)所规定的标准.该工艺还探索出:在酸洗和酸洗后的冲洗水中添加异抗坏血酸钠后,能够有效抑制三价铁离子的腐蚀危害,并减少二次锈蚀的产生.
简介:小分子有铟听氧化物(ITO)的结构的器官的太阳能电池(振荡)/molybdenum三氧化物(MoO3)(5nm)/rubrene(nm)/fullerene(C70)(ynm)/2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline(BCP)(6nm)/aluminum(艾尔)(150nm)被制作。为设备的活跃的层的厚度在细节被调查。结果证明rubrene层和C70层的最佳厚度分别地是30nm和25nm。设备的降级也被调查。,结果显示开电路的电压(Voc)不变化电线走火电流密度(Jsc),用时间连续地填满因素(FF)和功率变换效率(PCE)减少。降级能在周围的扩散并且渗透到活跃材料并且在房间与C70反应被归因于氧,它能导致界面的系列电阻的增加。