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简介：ThispaperaimsatstudyingtherelationshipbetweenuniversaltelecommunicationserviceandWestChinadevelopment.It,firstly,introducesourcountry'sdemandsforuniversaltelecommunicationservice;secondly,analysesthedemandofWestChinadevelopmentfortheuniversaltelecommunicationservice;thirdly,depictsthedevelopmentstatusoftelecommunicationindustryofthewestregion;fourthly,pointsoutthesignificanceofuniversaltelecommunicationservicetothewestarea;andlastly,bringsforwardtheconnotationofuniversaltelecommunicationserviceofwestarea.

简介：Anoveltwo-wayrotaryjoint(SandPband)isdescribed.ForSbandrotaryjoint,VSWRislessthan1.2overthefrequencyrangefrom1.2GHzto4.4GHz.ForPbandrotaryjoint,thestructureofthereentrantresonatorisusedtoreducethelengthoftherotaryjointtoaboutλ/4,andthespecialandsmallsizerequirementissatisfied.

简介：Astheevolutionofmobiletechnology,mobiledeviceshavebecomeanessentialtoolinpeople’sdailylife.Moreover,withtherapidgrowthofInternetandmobilenetworks,peoplecaneasilyaccessvariousservicesprovidedbymobileplatforms.Manyservicescanbeexecutedonthemobiledeviceswithvariousmobileapplicationslaunchedtomobileplatforms.Peoplecanchoosewhattheyliketoinstallintheirmobiledevicesandhencemaketheirlifemoreconvenient,entertaining,andproductive.However,therearetoomanymobileapplicationsforuserstochoose.Thegoalofthisresearchistoproposeamethodologywhichcanrecommendtop-Nlistsformobileapplications.Acommentcorrelationmatrixisproposed.Furthermore,arecommendationalgorithmformobileapplicationsbasedonusercommentsandkeyattributesisbuilt.Withtheproposedmethod,itoutperformsGoogleplayandisclosertouserrealfeelings.

简介：CRTCornercuttingtubeisconsideredasadefinitiverejectandwillbesenttoreclaimatalltimes.Itcausedlotsofmaterialloss.Inthispaper,anoveltechnologyusedtosaveCRTscornercuttingtubeispresentedfirstly.AsetofrepairsystemhasbeensuccessfullydevelopedtorepairCRTscornercuttingtube.Then,theprocesstechnologyforcornercuttingrepairhasbeenexcogitatedbyempiricalstudies.Finally,thecorrelativeperformancesofrepairedtubeareevaluated.Theexperimentalresultsshowthatthequalityofrepairedtubehasnodifferencewiththatofnormalproduct.Therepairyieldhasreachedabove97percent.Thisnewtechnologyhascontributedtoimprovingtheproductionyield,reducingthematerialconsumptionanddecreasingthecostofcolorCRTproduction.

简介：Ruraltelecomdevelopmentisoneofthefocalpointsnow.Thefavorableandunfavorablefactorsforruraltelecomdevelopmentwillcoexistwitheachotherinthefollowingyears.Therearealsodifferencesofdevelopmentbetweenurbantelephoneserviceandruralone.Thispaperstudiesallthesefactorsandpointsoutthepoliciesforruraltelecomdevelopment.

简介：Thisletterintroducesthedesignideas,simulationandtestresultsofanS-bandklystronwithbandwidthof11%,whichwasdevelopedbytheInstituteofElectronics,ChineseAcademyofSciences(IECAS).Onthepeakpowerlevelof800kW,theefficiencyofklystronismorethan30%;thegainismorethan41dB;theequal-drivingrelativeinstantaneousbandwidthisover11%;theaveragepowerislargerthan8kW,andthepowerfluctuationwithinbandwidthislessthan1.5dB.

简介：Thecontinuousinvestmentintomanpowerresource,istheradicalpowertoassurethesustainabledevelopmentofenterprises.Theenterprisesbothathomeandabroadattachhighimportancetothecontinuouseducationoftheiremployeesandconsolidatetrainingtoinspiretheiremployees.Inordertofaceincreasinglydrasticglobalcompetition,thetelecomenterprisesinourcountryshouldconsolidatecontinuouseducation,maketrainingplanstoadapttothelong-termdevelopmentoftheenterprisesandestablishtheeffectivemechanismofencouragementofcontinuouseducation.

简介：与开发和许多的应用程序流行对等(P2P)系统象eMule和BitTorrent那样，蠕虫可能采用这些P2P网络的特征置他们于危险地位。一些特征例如本地路由表格和申请路由机制，是有用的快速散布P2P蠕虫进网络。这篇论文试图给P2P蠕虫的全面调查。定义和P2P蠕虫的分类第一被讨论。然后，包括试验性的分析，当模特儿的繁殖，和防御途径，P2P蠕虫的研究和发展详细被探讨并且分析。

简介：这篇论文描述我们涉及在极端高温度陶艺(UHTC)上测量温度和紧张的光察觉到的节点组成的一个原型SHM系统的鉴定，发展和测试的研究活动材料直到1000掳C。商业地可得到的眼的设备能操作直到550掳C。为了提起温度，限制多达1000掳C，主要在为科学应用程序的开发中，特定的设备被识别了。一个原型SHM系统被开发了为紧张测量在蓝宝石纤维为温度测量和一个EFPI传感器采用一个FBG传感器。从thermo机械的测试的初步的调查结果显示那个以前的SHM系统能够精确地在UHTC材料上在提高的温度测量紧张。CLC数字TN253

简介：Supercontinuum(SC)generationhasattractedasignificantscientificinterestinthepastdecadesduetoitspromisingapplicationscoveringthefieldsofmetrology,spectroscopy,defense,aswellasmedicaltreatments.Todate,researchersaredevotedtoimprovingthespectralwidthandflatnessofSCgenerationbyusingspecialtyopticalfibers.Theflatnessofthespectrumisofimportancebecauseitcanimprovetheaccuracyofmeasurementinpracticalapplications.ThispapersummarizesthetheoryofSC,thestateoftheartofflatSCgenerationusingopticalfiberincludingphotoniccrystalfibers,softglassfibersaswellasgermania-dopedfibers,andsuggeststhefutureresearchdirectionofflatSClightsource.

简介：Inthispaper,theoperationprincipleoflaserrotaryencodersisexpoundedandtheopticalquadruplefrequencytechnologyusedinlaserrotaryencodersinex-plained,andthedesignideaofopticalsysteminΦ66mmlaserrotaryencoderismainlyintroduced,aswellasthechoiceofprincipaldevices.

简介：毫米波浪radio-over-fiber技术为在毫米波浪信号的无线通讯system.Optical产生是的下一代提供无线宽带服务表明潜力毫米波浪的光产生的一些方法的优点和缺点表明的毫米波浪radio-over-fibersystem.The的最重要的技术之一是discussed.Then光毫米波浪信号传播性能described.Finally，毫米的概述

简介：Themeasurementtheoremoffiberopticallydriveninstrumentforhigh-voltagelinecurrentispresented.ThePLLvoltage-frequency-narrowpulseprincipleanditsmicro-consumptionmechanismareproposed,followedbyanalysisonthetwomainfactorsaffectingPLLmeasurementprecision.Asoftwaredesignschemeusing80C196KBmicro-controllerisintroduced.Theexperimentresultissatisfactory.

简介：这篇论文提供复合条件质问(CCQ)和基于空格从踪迹代数学导出的踪迹信息使用要求引导的一个形式化方法的应用程序问题的一个形式化的定义。与解决CCQ的应用程序问题的形式化的进程，CCQ的申请的正式要求说明被给，一形式化，到正式要求说明的要求引导的结果的自动印射被执行，软件系统模型和应用程序代码被开发。通过住房信息上的全面质问的一个样品应用程序，可行性形式化，为CCQ的应用程序问题的自动软件开发被证明。结果关于形式化和自动软件开发为另外的问题有重要含意。

简介：Thedecisionsconcerningportfolioselectionforarmyengineeringandmanufacturingdevelopmentprojectsdeterminethebenefitofthoseprojectstothecountryconcerned.Projectsaretypicallyselectedbasedonexanteestimatesoffuturereturnvalues,whichareusuallydifficulttospecifyoronlygeneratedafterprojectlaunch.Ascenario-basedapproachispresentedheretoaddresstheproblemofselectingaprojectportfoliounderincompletescenarioinformationandinterdependencyconstraints.Inthefirststage,therelevantdominanceconceptsofscenarioanalysisarestudiedtohandletheincompleteinformation.Then,ascenario-basedprogrammingapproachisproposedtohandletheinterdependenciestoobtaintheprojects,whosereturnvaluesaremulti-criteriawithintervaldata.Finally,anillustrativeexampleofarmyengineeringandmanufacturingdevelopmentshowsthefeasibilityandadvantagesofthescenario-basedmulti-objectiveprogrammingapproach.

简介：Laser-inducedbreakdownspectroscopy(LIBS)hasbeenextensivelyappliedduetothecapabilitiesofreal-time,multi-phaseandmulti-elementanalysis.Withtheadvantages,portableLIBSisinrapiddevelopmentwithgreatpotentialoffieldmeasurements.Inthiswork,aportableLIBSwasdevelopedbya50μJlevellaserforexcitationandanobjectivelensforfocusingorimaging.Elementdetectionwassuccessfullyachievedbythissetup,andalsothemicroscopicobservationcouldbeobtainedwiththemagnificationof350×.ApreliminaryinvestigationwascarriedoutformineralrecognitionbythedevelopedportableLIBS.Theobtainedresultsindicatethattheelementdetectioncombinedwithmicroobservationwasaneffectivewayforrecognizingminerals,especiallyforsimilarmineralidentificationordiscrimination.Itissuggestedthatthemicro-joulelasercouldbealternativeforthecommercialportableLIBS,andtheon-sitemineralorrockrecognitionisapromisingfieldfortheapplication.

简介：Thispaperpresentsalargefieldphase-shiftinginterferencemicroscopeformicro-surfacetopographymeasurement.APZTisusedastheZ-directionalphaseshifter.TheinterferencemicroscopeisthecombinationoftheinfinitytubemicroscopewiththeMirautwo-beaminterferometer.Two-dimensionalprecisionmotorizedstageisalignedasthescanningsystemintheX-andY-directiontoextendthetestsurfacemeasurementrangeto12.5mm×12.5mm.Theminimumdisplacementis0.039μmandtheoverlappedproportionis0.22.Afaststitchingalgorithmisproposedbasedongridmatching.Accordingtothereflectivityofthecoreandtheferrule,theplatewiththetransmission/reflectivityratioof70/30isselectedtobalancetheinterferenceintensity.Theinstrumentisprovedtobevalidbyactualmeasurementoftheendsurfaceofanopticalfiberconnector.

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