简介：Thefluorineionsensitivefield-effecttransistor（F--ISFET）ismadebydepositingverythinLaF3filmongridoffield-effecttransistorwithsputtermethod.Theoperatingprinciple,measuringmethodandmeasuredresultsofF--ISFETaregiven.Themeasuredresultsshowthatthiskindofsensorhashighersensitivity,shorterresponsetimeandbetterlinearity.Onthebasisofexperimentalresults,thefactorofinfluencingthesteadinessandrepeatabilityofF--ISFETareconjectured.

简介：Modernnetworksystemshavemuchtroubleinsecurityvulnerabilitiessuchasbufferoverflow,bugsinMicrosoftInternet,sensornetworkroutingprotocoltoosimple,securityflawsofapplications,andoperatingsystems.Moreover,wirelessdevicessuchassmartphones,personaldigitalassistants(PDAs),andsensorshavebecomeeconomicallyfeasiblebecauseoftechnologicaladvancesinwirelesscommunicationandmanufacturingofsmallandlow-costsensors.Therearetypologiesofvulnerabilitiestobeexploitedinthesedevices.Inordertoimprovesecurities,manymechanismsareadopted,includingauthentication,cryptography,accesscontrol,andintrusiondetectionsystems(IDS).Ingeneral,intrusiondetectiontechniquescanbecategorizedintotwogroups:misusedetectionandanomalydetection.Themisusedetectionsystemsusepatternsofwell-knownattacksorweakspotsofthesystemstoidentifyintrusions.Theweaknessofmisusedetectionsystemsisunabletodetectanyfuture(unknown)intrusionuntilcorrespondingattacksignaturesareintrudedintothesignaturedatabase.Anomalydetectionmethodstrytodeterminewhetherthedeviationisfromtheestablishednormalusagepatternsornot.Thecriticalsuccessofanomalydetectionreliesonthemodelofnormalbehaviors.

简介：ThispaperstartswiththediscussionoftheprincipleofReduced-Rank(RR)Space-TimeAdaptiveProcessing(STAP).Itisfollowedbyadedicationoftheupperboundperformanceofalleigen-basedRRmethodsprovidedbyCrossSpectralMethod(CSM)undertheconditionofagivenprocessorrankandanidenticalsecondarysamplesize.AperformancecomparisonbetweentwoRRSTAPprocessorswithprefixedstructureandCSMisperformedbythemeansofsimulations.Itisshownthattheperformanceoftimepre-filteringfollowedbyjointlylocalizedSTAPstructure(i.e.3DT-SAP)isveryclosetotheupperboundandtherebyitisaneffectiveRRapproach.

简介：联合同轴的共鸣器的现象的模式的研究与理论被进行了。通过建立没有来源的传播线方程，有一个弄皱的内部售票员的同轴的共鸣器的边界条件被分析。最后，计算为Karlsruhe工学院(工具包)的共鸣器在大量折皱参数被执行相关同轴的振动陀螺仪。

简介：Greysequencegenerationcandrawoutanddevelopimpliedrulesoftheoriginaldata.Differentkindsofgenerationmethodsweresummarizedandclassifiedintotwotypes:partialgenerationandwholegeneration.Theaveragegenerationandstepwiseratiogenerationisdisussed,thepreferencegenerationisregardasaspecialcaseofproportionaldivisionbasedonanalysisgeometrictheory,proposeanideaofusingconcaveandconvexstatusofdiscretedatatodeterminethegenerationcoefficient.Basedonthestepwiseandsmoothratiogeneration,atendencyaveragegenerationisproposedandhaveacomparisonusingthedataprovidedinpaperslistedinthereferences.Thecomparisonprovesthatthenewgenerationisbetterthantheothertwogenerationsanderrorsareobviouslyreduced.

简介：ThemathematicalmodelofspaceborneSARsystemsanditscomputersimulationsaredescribed.Resultsofcomputersimulationsaboutrangemigration,rangemigrationcorrection,azimuthweightingandsignalgeneration/processingaregiven.ThissoftwarecanbeusedtosimulatethedynamicprocessesinspaceborneSARsystems,todevelopnewsignalprocessingtechniquesandtoevaluatetheperformanceofthedesignedsystem.

简介：Thewavelettransformhasremarkableadvantagesandwideapplicationsindenoisingbecauseofitscharacteristicofgoodtime-frequency.Basedontheanalysisoftraditionalwaveletdenoisingmethods,whicharebasedonFouriertransform,animprovedmethodisproposed.ItovercomestheshortcomingsofthetraditionalFourierdenoisingmethod.Inthispaper,thedenoisingproceduresareintroducedrespectivelybasedonthewavelettransformandthemethodofconnectingthewaveletthresholdwiththewaveletbasisisadopted.ThroughMatlabsimulationandconcretedata,itarrivesattheconclusionthatthemethodofsignaldenoisingbasedonthewavelettransformisobviouslymoreeffectiveandbetterthanthetraditionalmethodbasedonFouriertransform.

简介：Anovelellipsoidalhelicalantennaisproposedandstudiedinthisletter.Asaspecialin-stance,thehemisphericalhelicalantennasareanalyzedfirstly,whichindicatesthatthecharacteristicsofatwo-armunitarebetterthanthatofasingle-armunit.Basedonthis,theellipsoidalhelicalantenna,formedbychangingtheaxialdirection’sdimensionofthetwo-armhemisphericalhelicalantenna,isanalyzedbythemomentmethodwithcurvedbasicandtestingfunction.TheeffectstoVSWR(VoltageStandingWaveRatio),gain,polarizationandpatternsbytheaxialdirection’sdimensionsareinves-tigated.Thestudyresultsprovidedependablegisttothechoiceofantennaformataccordingtothepracticalrequirements.

简介：Whenthereturnscomefromtwoormoreunresolvedtargets(thesignalsarenotresolvedinthefrequencyortimedomains)inamonopulseradarsystem,thedirection-of-arrival(DOA)estimateindicatedbythemonopulseratioisnotthetrueinformationofthetrackedtarget.Thenthetrackingsystemsisinfluenced.Anapproachhasbeenproposedtodetectwhetherthereturnscomefromasingletargetortwounresolvedtargets.Theaboveapproachisextendedfromtwotothreeunresolvedtargets.Thesimulationindicatesthatthedetectionprobabilityunderthethreeunresolvedtargetsisnotsuretoexceedthedetectionprobabilityunderthetwounresolvedtargets.

简介：ZnTe/ZnTe∶Culayerisusedasacomplexbackcontact.TheparametersofCdTesolarcellswithandwithoutthecomplexbackcontactsarecompared.Theeffectsofun-dopedlayerthickness,dopedconcentrationandpost-depositionannealingtemperatureofthecomplexlayeronsolarcellsperformanceareinvestigated.TheresultsshowthatZnTe/ZnTe∶CulayercanimprovebackcontactsandlargelyincreasetheconversionefficiencyofCdTesolarcells.Un-dopedlayerandpost-depositionannealingofhightemperaturecanincreaseopenvoltage.Usingthecomplexbackcontact,asmallCdTecellwithfillfactorof73.14%andconversionefficiencyof12.93%isobtained.

简介：ThelowresistancePTCceramicthermistormaterialwithexcellenteleectricalpropertiesaresuccessfullyfabricatedbyrawmaterialsatindustrialrangemadeinourcountryonthestudyofitscompositionexpressionandfabricationprocessbyusingtheadditionofNb,La,Y,Ta,microstructureregulatorBNandASTLphase.Thecompositionanditsfabricationmethodarestudied.TherelationofelectricalpropertiesofthePTCceramicmaterialtoitscompositionexpressionanditsrelatedelectricalpropertiesarediscussed.

简介：Differenceexpansion(DE)isoneofthefamousschemesinthefieldofreversibledatahiding.Withthehighefficiencyandsimplicity,DEalsohasreceivedmoreattentionovertheyears.DEhasagoodinformationcapacity,butduetoitsmajorlocationmap,thepurepayloadisratherlow.Thereforemanyscholarsdidrelevantimprovementswhichletnpixelsasaunitinsteadoftheoriginaltwopixelsasaunitandcanadaptivelyadjustthenumberofembeddingsecretinformationaccordingtothesmoothnessdegreeoftheblock,whichachievestheresultofimprovingtheinformationpayloadortheimagequality.Inthispaper,thestudyofDE-basedreversibledatahidingschemesiscomprehensivelydiscussed.TheperformanceofDEbasedschemesisevaluatedandcomparedintermsofembeddingcapacityandstego-imagequality.

简介：在这份报纸，photonic水晶温度传感器的一个模型基于在直photonic水晶波导的水晶microcavity被建议。在在不同温度下面的传感器中的光的传播特征被使用有限差别的时间域(FDTD)模仿方法。热扩大和硅的热眼的效果被考虑。结果证明microcavity的反响的波长作为升起的温度线性地增加。与温度一起的波长移动是6.6下午/愠敲猠畴楤吗？？

简介：Inthispaper,anewpseudocolormethodtodisplaysoundholospectrogramisproposedandstudied.Onthepictureofsuchafour-dimensionalspectrogram,thehorizontalaxisreferstotime,theverticalaxistofrequency,thecolortophase,andthebrightnesstomagnitude.Anexampleofdisplayisgivenbyemployingtherealizedsystem.

简介：Amethod,whichcanpredictthevalencebandoffsetsatstrainedlayerheterojunctionsunderdifferentstrainsituationsonlybycalculatingbandstructuresanddeformationparametersofthebulkmaterials,issuggested.Theapplicabilityofthismethodisverifiedbycalculationofthevalencebandoffsetsatstrainedlayerheterojuntions,suchasInP/InAs,InP/GaP,GaAs/InAs,GaP/GaAsandAlAs/InAswithvariousstrainconditions.

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：Tomeetthechallengeofimplementingrapidlyadvanced,time-consumingmedicalimageprocessingalgorithms,itisnecessarytodevelopamedicalimageprocessingtechnologytoprocessa2Dor3Dmedicalimagedynamicallyontheweb.Butinapremiersystem,onlystaticimageprocessingcanbeprovidedwiththelimitationofwebtechnology.ThedevelopmentofJavaandCORBA(commonobjectrequestbrokerarchitecture)overcomestheshortcomingofthewebstaticapplicationandmakesthedynamicprocessingofmedicalimagesonthewebavailable.Todevelopanopensolutionofdistributedcomputing,weintegratetheJava,andwebwiththeCORBAandpresentaweb-basedmedicalimagedynamicprocessingmethed,whichadoptsJavatechnologyasthelanguagetoprogramapplicationandcomponentsofthewebandutiliestheCORBAarchitecturetocopewithheterogeneouspropertyofacomplexdistributedsystem.Themethodalsoprovidesaplatform-independent,transparentprocessingarchitecturetoimplementtheadvancedimageroutinesandenableuserstoaccesslargedatasetandresourcesaccordingtotherequirementsofmedicalapplications.TheexperimentinthispapershowsthatthemedicalimagedynamicprocessingmethodimplementedonthewebbyusingJavaandtheCORBAisfeasible.

简介：ThisletterstudiesonthedetectionoftexturefeaturesinSyntheticApertureRadar(SAR)images.ThroughanalyzingthefeaturedetectionmethodproposedbyLopes,animprovedtexturedetectionmethodisproposed,whichcannotonlydetecttheedgeandlinesbutalsoavoidstretchingedgeandsuppressinglinesoftheformeralgorithm.ExperimentalresultswithbothsimulatedandrealSARimagesverifytheadvantageandpracticabilityoftheimprovedmethod.

简介：Aimingattheproblemthatthereisn'tanystandardizedcalibrationmethodfortheperformanceindexofsurfaceplasmonresonance(SPR)sensor,thecalibrationmethodforkeyperformanceindicesofSPRsensorissummarizedandproposedbasedonthecomparisonofrelativemethodsanddefinitionofeachindex.Experimentaldataofsucrosesolutionswithvariousconcentrationsareobtainedbytheself-buildingSPRinstrument,andthenthecalibrationmethodisusedtodeterminetheperformanceindices,suchasnoise,drift,sensitivity,resolution,linearity,dynamicrangeandreproducibility.Experimentalresultsshowthatthedefinitionofindicesisreasonable,andthecalibrationmethodiscorrect,whichhasgreatsignificanceforperformanceevaluationofSPRsensor.

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