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简介：一个新奇photothermal开车方法被建议。新奇photothermal微致动器(PTA)与这个方法被开发。我们与不同宽度介绍了不对称的广泛的手臂的偏转机制。当红外线的激光的一根横梁照耀时，特定的表面区域的不同的率控制的手臂，不同增加温度和photothermal扩大引起放大侧面的偏转。1000渭m长度微致动器的一个原型被使用一个excimer激光micromachining系统，并且用聚丙烯材料生产。实验被执行了检查偏转的可行性，与象激活的外部力量来源的一根激光二极管(650nm)微致动器。结果证明没有严格地考虑尺寸或照耀的轻点的地点，致动器罐头实际上产生明显的侧面的偏转。偏转地位微致动器能被从0mW把激光力量改变到10mW从0渭m遥远地控制到14.33渭m。这种新奇PTA为操作相当简单、方便。它将为micro/nano-technology并且与大排水量/使活动力量和remotecontrolling的域里的应用程序是相当有用的。

简介：把光纤维(PMOF)和选择液体水晶注射技术基于聚合物microstructured，新奇温度控制悦耳的衰减器在这篇论文理论上被设计。在我们的实验，有高效的光纤维成功地被拉的PMMAmicrostructured和进microholes的液体水晶5CB的选择注射被认识到。悦耳的衰减器与扑灭比率被制作在60dB上，它与设计同意很好。CLC数字TN715这个工作被国家基本研究程序支持中国(973程序)(2003CB314907)，为信息科技(TNList)的清华国家实验室，和国家天赋中国的科学基础。

简介：这篇文章为溪流控制转移提出一个算法有有限接收装置缓冲区(RBUF)的协议(SCTP)改进。这是众所周知的，SCTP是最重要的转移控制协议之一，但是大多数研究集中于没有RBUF限制的状况。在这研究，我们在表演上分析RBUF尺寸的影响。计算机模拟证明网络实用程序在可靠转移是低的，当RBUF尺寸比带宽延期产品小时。由学习传播顺序数字(TSN)转移进步，我们发现同伴接收装置窗户(PEER_RWND)落后于真接收装置窗户(RWND)，导致差的网络用途。与有限RBUF改进SCTP性能，虚拟接收装置窗口(VIRTUAL_RWND)被介绍。基于VIRTUAL_RWND，一个算法被建议增加送的率。计算机模拟在两个评估了建议算法的优秀表演没有失去的包的理想的连接和有失去的包的非理想的连接。

简介：Imagemorphingisapowerfultoolforvisualeffect.Inthispaper,aviewinterpolationalgorithmisproposedtosimulateavirtualwalkalongastreetfromstartpositiontoendposition.Tosimulateavirtualwalkingviewneedstocreatenewappearingsceneinthevision-vanishingpointanddisappearingscenebeyondthescopeofview.Toattainthesetwoaimsweusetwoenhancedpositionparameterstomatchpixelsofsourceimagesandtargetimages.Oneenhancedpositionparameteristheangularcoordinatesofpixels.Anotherenhancedpositionparameteristhedistancesfrompixelstothevision-vanishingpoint.Accordingtotheparametervalues,pixelsbeyondthescopeofviewcanbe'moved'outinlinearinterpolation.Resultdemonstratesthevalidityofthealgorithm.Anotheradvantageofthisalgorithmisthattheenhancedpositionparametersarebasedonreallocationsandwalkingdistances,soitisalsoanapproachtoonlinevirtualtourbysatellitemapsofvirtualglobeapplicationssuchasGoogleEarth.

简介：Inthispaper,basedonant-algorithm,weproposeaQoSmulticastroutingschemeinInternet.Wefirstdescribeant-algorithmmodelandgiveant-networkmodel,thenpresentanapproachusingant-algorithmtooptimizethemulticastrouteswithQoSconstaints.Finally,simulationshasbeenmadetoshowtheefficiencyoftheapproachintheenvironmentofOPNETsimulationsoftware,andthesimulationresultsshowthattheproposedapproachcanfindthebestoptimalmulticastrouteswhichcansatisfythedelay-boundedrequirementandavoidcongestednodesassoonaspossible.

简介：Whentheclassicalconstantfalse-alarmrate(CFAR)combinedwithfuzzyC-means(FCM)algorithmisappliedtotargetdetectioninsyntheticapertureradar(SAR)imageswithcomplexbackground,CFARrequiresblock-by-blockestimationofcluttermodelsandFCMclusteringconvergestolocaloptimum.Toaddresstheseproblems,thispaperpro-posesanewdetectionalgorithm:knowledge-basedcombinedwithimprovedgeneticalgorithm-fuzzyC-means(GA-FCM)algorithm.Firstly,thealgorithmtakestargetregion’smaximumandaverageintensity,area,lengthoflongaxisandlong-to-shortaxisratiooftheexternalellipseasfactorswhichinfluencethetargetappearingprobability.Theknowledge-baseddetectionalgorithmcanproducepreprocessresultswithouttheneedofestimationofcluttermodelsasCFARdoes.AfterwardtheGA-FCMalgorithmisimprovedtoclusterpre-processresults.IthasadvantagesofincorporatingglobaloptimizingabilityofGAandlocaloptimizingabilityofFCM,whichwillfurthereliminatefalsealarmsandgetbetterresults.TheeffectivenessoftheproposedtechniqueisexperimentallyvalidatedwithrealSARimages.

简介：Aggregatesignaturesareausefulprimitivewhichallowsaggregatingmanysignaturesondifferentmessagescomputedbydifferentusersintoasingleandconstant-lengthsignatureandadaptstoMobileAdhocNETwork(MANETs)verymuch.JuminSong,etal.presentedanID-basedaggregatesignature,appliedittoMANETsandproposedasecureroutingscheme.Inthiswork,weanalyzeJuminSong,etal.’saggregatesignatureschemeandfindsomelimitationsonitsbatchverification.Inaddition,inthiswork,weapplyCraigGentry,etal.’sID-basedaggregatesignaturetoon-demandroutingpro-tocoltopresentasecureroutingscheme.Ourschemenotonlyprovidessoundauthenticationandasecureroutingprotocolinadhocnetworks,butalsomeetsthenatureofMANETs.

简介：第四代(4G)无线通讯系统被部署了或不久在许多国家被部署。与无线移动设备和服务的爆炸，然而，仍然有一些挑战，不能甚至被4G提供，例如光谱危机和内部房间的干扰。电信操作符转弯了承诺自己分享可得到的资源，包括硬件和软件资源。因此与相互的基础结构，‘integration’应该被加亮，特别在第五代(5G)被期望到的无线系统超过2020被部署。在文章的作者建议了潜在的细胞的体系结构，并且讨论了内部操作员的收音机接口为5G的基于的同步(肋骨)无线通讯系统。内部操作员的肋骨和典型情形的一个计划，与相应干扰的分析一起被给。分享的参数，内部操作员的肋骨的发信号的协作和为肋骨的信号(RS)设计也是的听的引用的分析执行了。

简介：Unmannedaerialvehicles(UAVs)mayplayanimportantroleindatacollectionandoffloadinginvastareasdeployingwirelesssensornetworks,andtheUAV’sactionstrategyhasavitalinfluenceonachievingapplicabilityandcomputationalcomplexity.Dynamicprogramming(DP)hasagoodapplicationinthepathplanningofUAV,butthereareproblemsintheapplicabilityofspecialterrainenvironmentandthecomplexityofthealgorithm.BasedontheanalysisofDP,thispaperproposesahierarchicaldirectionalDP(DDP)algorithmbasedondirectiondeterminationandhierarchicalmodel.WecompareourmethodswithQ-learningandDPalgorithmbyexperiments,andtheresultsshowthatourmethodcanimprovetheterrainapplicability,meanwhilegreatlyreducethecomputationalcomplexity.

简介：Theobjectiveofsteganographyistohidemessagesecurelyincoverobjectsforsecretcommunication.Howtodesignasecuresteganographicalgorithmisstillmajorchallengeinthisre-searchfield.Inthisletter,developingsecuresteganographyisformulatedassolvingaconstrainedIP(IntegerProgramming)problem,whichtakestherelativeentropyofcoverandstegodistributionsastheobjectivefunction.Furthermore,anovelmethodisintroducedbasedonBPSO(BinaryParticleSwarmOptimization)forachievingtheoptimalsolutionofthisprogrammingproblem.Experimentalresultsshowthattheproposedmethodcanachieveexcellentperformanceonpreservingneighboringco-occurrencefeaturesforJPEGsteganography.

简介：Thispaperconiesupwithanewideathattriestooptimizetheperformanceofimagesegmentationalgorithmsbasedontheirobjectiveevaluationknowledge.Aprototypeexpertsystemisdesignedandimplementedaccordingtothisidea.Kxperimentalresultsindicatethatthissystemisfeasibleandpractical.Thisideaalsooffersanefficientapproachforalgorithmoptimizationofimageprocessingandanalysis.

简介：这份报纸在使隧道褪色的伪静电干扰rayleigh上为合作传播基于空间调整论述一个新奇增长中继协议，也就是空间的调整增长中继(SMIR)，它使用空间调整的概念进增长中继。在建议协议，信息位被印射进带单位的二个信息：1)在星座图的一个星座点并且2)空间领域，即进一个特别合作用户数字的地点。为SMIR协议的框架错误率(FER)的分析表示被导出。模拟结果证实介绍数学分析并且证明那个SMIR协议分别地为3-bit/symbol和5-bit/symbol传播在常规协议上在信号获得2和3dB到噪音比率(SNR)。而且，在这个协议下面，系统能完成高得多的产量，它意味着我们的建议协议在性能带重要获得。

简介：Inordertoovercomethedisadvantagesoflowaccuracyrate,highcomplexityandpoorrobustnesstoimagenoiseinmanytraditionalalgorithmsofcloudimagedetection,thispaperproposedanovelalgorithmonthebasisofMarkovRandomField(MRF)modeling.Thispaperfirstdefinedalgorithmmodelandderivedthecorefactorsaffectingtheperformanceofthealgorithm,andthen,thesolvingofthisalgorithmwasobtainedbytheuseofBeliefPropagation(BP)algorithmandIteratedConditionalModes(ICM)algorithm.Finally,experimentsindicatethatthisalgorithmforthecloudimagedetectionhashigheraverageaccuracyratewhichisabout98.76%andtheaverageresultcanalsoreach96.92%fordifferenttypeofimagenoise.

简介：为了解决粒子退化现象并且同时避免，取样贫穷，这份报纸为一般大小写基于好采样算法建议了一个改进粒子过滤器，与好采样(PF-FR)作为粒子过滤器打电话。由介绍比较距离的过程并且基于优化联合计划产生新粒子，因此，PF-FR过滤器以粒子系统的有效性和差异两个都比通用采样重要性采样粒子过滤器(PF先生)更好表现在nonlinear/non-Gaussian的状态的显然改善的评价精确性当模特儿。模拟显示建议PF-FR算法能维持粒子的差异并且因此与粒子的更少的数字完成一样的评价精确性。因而，PF-FR过滤器是在非线性的州的评价的应用的一种竞争选择。

简介：AimingtosolvethemisclassificationproblemsofunsupervisedpolarimetricWishartclassificationalgorithmbasedonFreemandecomposition,anunsupervisedPolarimetricSyntheticApertureRadar(SAR)Interferomery(PolInSAR)classificationalgorithmbasedonoptimalcoherencesetparametersisstudiedandproposed.ThisalgorithmusestheresultofFreemandecompositiontodividetheimageintothreebasiccategoriesincludingsurfacescattering,volumescattering,anddouble-bounce.Then,thePolInSARoptimalcoherencesetparametersareusedtofinelydivideeachofthethreebasiccategoriesinto9categories,andthewholeimageisdividedinto27categories.BecauseboththeFreemandecompositionresultandoptimalcoherencesetparametersindicatespecificscatteringcharacteristics,thewholeimageismergedinto16categoriesbasedonphysicalmeaning.Atlast,theWishartclusterisemployedtoobtainthefinalclassificationresult.Topreservethepurityofscatteringcharacteristics,pixelswithsimilarscatteringcharacteristicsarerestrictedtobeclassifiedwithotherpixels.Thefinalclassificationresultseffectivelyresolvethemisclassificationproblem,notonlythebuildingscanbeeffectivelydistinguishedfromvegetationinurbanareas,butalsotheroadiswelldistinguishedfromgrass.Inthispaper,theE-SARPolInSARdataofGermanAerospaceCenter(DLR),areusedtoverifytheeffectivenessofthealgorithm.

简介：Anadaptiveinterferencecancleralgorithmbasedonfourth-ordercumulantisproposedtoovercomethefaultofconventionalautocorrelation-basedLeastMeanSquare(LMS)algorithmwhichcannotsuppressthecorrelatedGaussiannoises.Therecursiveformulationoftheproposedalgorithmisgiventoreduceitscomputationalcomplexity.Thesimulationresultsarepresentedtodemonstratetheeffectivenessofthisnovelapproach.

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简介：Operationalsoftwaresystemsoftenexperiencean'aging'phenomenon,characterizedbyprogressiveperformancedegradationandasuddenhang/crashfailure.Softwarerejuvenationisaproactivefault-tolerancestrategyaimedtopreventunexpectedoutagesduetoaging.Anewrejuvenationstrategybasedonmeasurementandtime,andconstructsaSRNmodeltoevaluatethisstrategy.Numericalresultsshowthatthisstrategyoutweighseitherthepurelymeasurementbasedorthepurelytime-basedstrategyandcaneffectivelyimprovesystemperformance.

简介：Recentprogressesmadebyauthorsonmonochromaticandtunableterahertz(THz)generationbasedonnonlinearopticsarereviewed,includingTHzparametricoscillation(TPO)anddifferencefrequencygeneration(DFG).Fromthetechnicalpointofview,wedevelopextra-andintra-cavitysurface-emittedTPO,aswellasDFGwithQPM-GaAscrystal.Fromthepointofviewofmechanism,Cherenkovphase-matchingiscomprehensivelyinvestigatedinbothbulkcrystalandplanarwaveguide.AnovelschemeforcascadingenhancedCherenkovDFGinwaveguideisproposed.Fromthepointofviewofmaterial,organiccrystal4-N,N-dimethylamino-4’-N’-methyl-stibazoliumtosylate(DAST)isutilizedasthenonlinearmedium.