简介：信息产业时代的到来，中国载人飞船的成功发射，数码风暴的“狂风巨浪”，都为我们生活的祥和空间平添一份精彩！

简介：Sheneverthoughtthecountrysidescenecouldbesointeresting.'Theancientfanners'housesoftheseZhuangminoritygroupshavethreefloors-thefirstisforraisinganimalslikepigsandhens,thesecondisforpeopleandthethirdisforstoringgrainandcom.'It'saprettysmartdesignbecauseitsavesspaceandisveryenvironmentally-friendly,'says11-year-oldTangZijun,

简介：

简介：THESEoldZhuangminorityfarmers'houseshavethreestories-pigs,hensandotherfarmanimalsarekeptonthefirstfloor,familymembersliveonthesecondandgrainandcornarestoredonthethird.'It'saprettysmartdesignbecauseit

简介：

简介：Itisafactthatthefeedbackdelayactuallyarieseindigitalcontrolsystems.Itisnecessarytomodifythestructureofdigitalcontrolsystemsanddevelopnewcontrolalgorithms,whichisdoneinthispaper.Agreatnumberofdigitalcomputersimulationexperimentshaveshowntheobviousadvantageofthenewalgorithms.

简介：这篇论文为Xinjiang论述geomorphologic区域化的一个方法，与Srtm-DEM(分辨率90m)和为1990的TM图象(分辨率30m)的使用。在geomorphologic类型的解释和分类以后，现在的研究集中

简介：

简介：古人有云“物以稀为贵”。但在IT行业愈演愈烈的今天，恐怕没人能否认这一点：时代变迁，现在已经进入了物以“薄”为贵的时代。

简介：

简介：Time-to-DigitalConverter(TDC)isakeyblockusedasthephase/frequencydetectorinanAll-DigitalPhase-LockedLoop(ADPLL).Usually,itoccupiesalargeproportionofADPLL'stotalpowerconsumptionuptoabout30%to40%.Inthispaper,thedetailedpowerconsumptionofdifferentcomponentsintheTDCisanalyzed.APowerManagementBlock(PMB)ispresentedfortheTDCtoreduceitspowerconsumption.A24-bitsTDCcorewiththeproposedPMBisimplementedinHJTC0.18μmCMOStechnology.Simulationresultsshowthatupto84%powerreductionisachievedusingourproposedtechnique.

简介：

简介：为μDIGITAL500写使用体验是一件具有挑战性的工作，因为感觉没有太多可写的。这并不是因为它的表现糟糕，而是因为它实在太便捷了。只要按下电源开关，不到一秒钟后你就可以拍摄出高分辨率、效果相当不错的照片来，轻轻松松就能搞定一切。

简介：

简介：Adigitalwatermarkingtechniqueisamulti-scientificdisciplinewhichisdevelopedrapidlyinlastseveralyearsfordigitalcontentprotection,suchascopyrightprotection,authenticationprotection,sourcetracing,etc.However,inrealisticscenarios,thedigitalwatermarkingsystemfacessignificantsecureissues,forexample,theattackerswanttoremove,detect,orembedillegalwatermarksignals.Therefore,theaimofthiscontributionistoillustraterecentresultsofrobustandsecurewatermarkingtothesignalprocessingcommunity,andhighlightbothbenefitsandstillopenissues.Specifically,thispaperisintendedtointroducetheconceptofsecureandrobustdigitalwatermarkingsystem,andprovidewithproblemsandtheircountermeasures.Firstofall,theclassicwatermarkmodelandcryptosystemwillbereviewedandthen,theconceptofsecureandrobustdigitalwatermarkingsystemwillbedescribed.Next,thewatermarkattackwillbeclassifiedanddescribed.Finally,somecountermeasuresthatcanhelptoimprovesecureandrobustnessareconsidered.IndexTermsCountermeasures,digitalwatermarkingsystem,robust,security,watermarkattacks.

简介：Thereisagrowinginterestininvestigatingtheaccuracyofdigitalelevationmodel(DEM).HoweverpeopleusuallyhaveanunbalancedviewonDEMerrors.TheyemphasizeDEMsamplingerrors,butignoretheimpactofDEMresolutionandterrainroughnessontheaccuracyofterrainrepresentation.ThisresearchputsforwardtheconceptofDEMterrainrepresentationerror(Et)andtheninvestigatesthegeneration,factors,measurementandsimulationofDEMterrainrepresentationerrors.Amulti-resolutionandmulti-reliefcomparativeapproachisusedasthemajormethodologyinthisresearch.Theexperimentrevealsaquantitativerelationshipbetweentheerrorandthevariationofresolutionandterrainroughnessatagloballevel.Rootmeansquareerror(RMSEt)isregressedagainstsurfaceprofilecurvature(V)andDEMresolution(R)at10resolutionlevels.ItisfoundthattheRMSEtmaybeexpressedasRMSEt=(0.0061·V+0.0052).R-0.022·V+0.2415.ThisresultmaybeveryusefulinforecastingDEMaccuracy,aswellasindeterminingtheDEMresolutionrelatedtotheaccuracyrequirementofparticularapplication.

简介：Inthispaper,anewtechniqueisproposedforrotation,scalingandtranslation(RST)invariantimagewatermarkingbasedonlog-polarmappings(LPM)andphase-onlyfiltering(POF).ThewatermarkisembeddedintheLPMofFouriermagnitudespectrumoftheoriginalimage,andasmallportionofresultingLPMspectrumisusedtocalculatethewatermarkpositions.Thistechniqueavoidscomputinginverselog-polarmapping(ILPM)topreservethequalityofthewatermarkedimage,andavoidsexhaustivesearchtosavecomputationtimeandreducefalsedetection.Experimentalresultsdemonstratethatthedigitalwatermarkingtechniqueisinvariantandrobusttorotation,scaling,andtranslationtransformation.

简介：Thispaperistoconstructa'digitallocal,regional,region'informationframeworkbasedonthetechnologyof'SIG'anditssignificanceandapplicationtotheregionalsustainabledevelopmentevaluationsystem.First,theconceptofthe'gridcomputing'and'SIG'isinterpretedanddiscussed,thentherelationshipbetweenthe'gridcomputing'and'digitalregion'isanalyzed,andtheframeworkofthe'digitalregion'isputforward.Finally,thesignificanceandapplicationof'gridcomputing'tothe'regionsustainabledevelopmentevaluationsystem'arediscussed.

简介：

简介：