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简介：ThedevelopmentandmaintenanceofthecontrolsystemsofthefourLargeHadronCollider(LHC)experimentswillrequireanon-negligibleamountofresourcesandeffort.InordertominimisetheoveralleffortrequiredtheJointControlsProject(JCOP)wasset-upasacollaborationbetweenCERNandthefourLHCexperimentstofindandimplementcommonsolutionsforthecontroloftheLHCexperiments.ItisoneofthefewexamplesofsuchawidecollaborationandthereforetheexistenceoftheJCOPprojectisextremelysignificant.Thispaperwillgiveabriefoverviewoftheproject,itsstructureanditshistory.Itwillgoontosummarisethevarioussub-projectsthathavebeeninitiatedundertheauspicesofJCOPtogetherwiththeircurrentstatus.ItwillhighlightthattheJCOPgeneralprincipleistopromotetheuseofindustrialsolutionswhereverpossible.However,thisdoesnotruleouttheprovisionofcustomsulutionswhennon-standarddevicesorverylargenumbersofdeviceshavetobecontrolled.ThepaperwillalsodiscussthearchitectureforeseenbyJCOPandwhereinthisarchitecturethevarioustypesofsolutionsareexpectedtobeused.Finally,althouththeselectionofcommonindustrialandcustomsolutionsisanecessaryconditionofrJCOPtosucceed,theuseofthesesolutionsinthemselveswouldnotnecessarilyleadtotheproductionofhomogeneouscontrolsystems,Therefore,thepaperwillfinishwithadescriptionoftheJCOPFramework,whichisbeingdevelopedtopromotetheuseofthesecommonsolutions,toireducethedevelopmenteffortrequiredbythevariousexperimentdevelopmentteamsandtohelptobuildandintegratecontrolsystemswhichcanbemoreeasilymaintained.

简介：ThedevelopmentandmaintenanceofthecontrolsystemsofthefourLHCexperimentswillrequireanon-negligibleamountofresourcesandeffort.TheJointControlsProject(JCOP)[1]hasbeenset-upasacollaborationbetweenCERNandthefourLHCexperimentstofindcommonsolutionsfortheLHCexperiments'controlsystems.AlthoughtheJCOPgeneralprincipleistopromotetheuseofindustrialssoluitionswhereverpossible,customsolutionsarestillrequiredwhennon-standarddevicesorverylargenumbersofdeviceshavetobecontrolled.Furthermore.toeasethedevelopmentandintegrationofbothstandardandnon-standarddevicesintothecontrolsystemanumberofsoftwareFrameworksareunderdevelopment.ThispaperwilldescribethevarioussolutionsbeingproposedbyJCOPincludingtheSupervisoryandFront-Endframeworksaswellasthevariousindustrialandcustomcomponents.Inaddition,ItwillalsodescribewherethesefitintotheforeseenJCOPcontrolsarchitecture.ThepaperwillthenhighlightinmoredetailtheFront-EndFramework.

简介：WesolvetheproblemofuplinkvideostreaminginCDMAcellularnetworksbyjointlydesigningtheratecontrolandschedulingalgorithms.Inthepricing-baseddistributedratecontrolalgorithm,thebasestationannouncesapricefortheperunitaveragerateitcansupport,andthemobiledeviceschoosetheirdesiredaveragetransmissionratesbybalancingtheirvideoqualityandcostoftransmission.Eachmobiledevicethendeterminesthespecificvideoframestotransmitbyavideosummarizationprocess.Inthetime-division-multiplexing(TDM)schedulingalgorithm,thebasestationcollectstheinformationonframestobetransmittedfromalldeviceswithinthecurrenttimewindow,sortstheminincreasingorderofdeadlines,andschedulesthetransmissionsinaTDMfashion.Thisjointalgorithmtakesadvantageofthemulti-usercontentdiversity,andmaximizesthenetworktotalutility(i.e.,minimizethenetworktotaldistortion),whilesatisfyingthedeliverydeadlineconstraints.Simulationsshowedthattheproposedalgorithmsignificantlyoutperformstheconstantrateprovisionalgorithm.

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简介：GiventhenullresultsofsearchesfornewphysicsattheLHC,weinvestigatetheone-loopeffectsSUSYQCDintheprocesse+e-→tgattheILCinMinimalSupersymmetricStandardModel（MSSM）.WefindthattherelativeSUSY-QCDcorrectionstothecrosssectionofe+e-→tgcanmaximallyreach6.5%（3.2%）attheILCwith（1/2）s=1000GeVwhenm1=313.4GeVandmg=500（1500）GeV.

简介：Asystemofjointlytransferringtimesignalswitharateof1pulsepersecond（PPS）andfrequencysignalsof10MHzviaadensewavelengthdivisionmultiplex-based（DWDM）fiberisdemonstratedinthispaper.Thenoisesofthefiberlinksaresuppressedandcompensatedforbyacontrolledfiberdelayline.Amethodofcalibratingandcharacterizingtimeisdescribed.The1PPSissynchronizedbyfeed-forwardcalibratingthefiberdelaysprecisely.Thesystemisexperimentallyexaminedviaa110kmspooledfiberinlaboratory.Thefrequencystabilitiesoftheuserendwithcompensationare1.8×10-14at1sand2.0×10-17at104saveragetime.Thecalculateduncertaintyoftimesynchronizationis13.1ps,whereasthedirectmeasurementoftheuncertaintyis12ps.Next,thefrequencyand1PPSaretransferredviaametropolitanareaopticalfibernetworkfromonecentralsitetotworemotesiteswithdistancesof14kmand110km.Thefrequencystabilitiesof14kmlinkreach3.0×10-14averagedin1sand1.4×10-17in104srespectively;andthestabilitiesof110kmlinkare8.3×10-14and1.7×10-17,respectively.Theaccuraciesofsynchronizationareestimatedtobe12.3psforthe14kmlinkand13.1psforthe110kmlink,respectively.

简介：ThispaperproposesanadaptivejointsourceandchannelcodingschemeforH.264videomulticastoverwirelessLANwhichtakesintoaccounttheusertopologychangesandvaryingchannelconditionsofmultipleusers,anddynamicallyallocatesavailablebandwidthbetweensourcecodingandchannelcoding,withthegoaltooptimizetheoverallsystemperformance.Inparticular,sourceresilienceanderrorcorrectionareconsideredjointlyintheschemetoachievetheoptimalperformance.Andachannelestimationalgorithmbasedontheaveragepacketlossrateandthevarianceofpacketlossrateisproposedalso.Twooverallperformancecriteriaforvideomulticastareinvestigatedandexperimentalresultsarepresentedtoshowtheimprovementobtainedbythescheme.

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简介：Thispaperintroducesajointnonlinearityandchromaticdispersionpre-compensationmethodforcoherentopticalorthogonalfrequency-divisionmultiplexingsystems.Theresearchresultsshowthatthismethodcanreducethewalk-offeffectandcanthereforeequalizethenonlinearimpairmentseffectively.Comparedwiththeonlyotherexistingnonlinearitypre-compensationmethod,thejointnonlinearityandchromaticdispersionpre-compensationmethodisnotonlysuitableforlow-dispersionopticalorthogonalfrequency-divisionmultiplexingsystem,butalsoeffectiveforhigh-dispersionopticalorthogonalfrequency-divisionmultiplexingtransmissionsystemwithhigherinputpowerbutwithoutopticaldispersioncompensation.Thesuggestedsolutiondoesnotincreasecomputationcomplexitycomparedwithonlynonlinearitypre-compensationmethod.For40Gbit/scoherentopticalorthogonalfrequency-divisionmultiplexing20×80kmstandardsingle-modefibresystem,thesuggestedmethodcanimprovethenonlinearthreshold(forQ>10dB)about2.7,1.2and1.0dB,andthemaximumQfactorabout1.2,0.4and0.3dB,for2,8and16ps/(nm·km)dispersioncoefficients.

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简介：TheHongKongObservatory(HKO)provideslow-levelturbulencealertingservicefortheHongKongInternationalAirport(HKIA)throughthewindshearandturbulencewarningsystem(WTWS).IntheWTWS,turbulenceintensitiesalongtheflightpathsoftheairportareestimatedbaseduponcorrelationequationsestablishedbetweenthesurfaceanemometerdataandtheturbulencedatafromresearchaircraftbeforetheopeningoftheairport.Theresearchaircraftdataarenotavailableonday-to-daybasis.Theremotesensingmeteorologicalinstruments,suchastheDopplerlightdetectionandranging(LIDAR)andradar,maybeusedtoprovidedirectmeasurementsofturbulenceintensitiesovertherunwaycorridors.TheperformancesofLIDAR-andradar-basedturbulenceintensitydataarestudiedinthispaperbasedonactualturbulenceintensitymeasurementsmadeon423commercialjetsforatypicalcaseofterrain-inducedturbulenceinassociationwithatyphoon.Itturnsoutthat,withthetuningoftherelativeoperatingcharacteristic(ROC)curvebetweenhitrateandfalsealarmrate,theLIDAR-basedturbulenceintensitymeasurementperformsbetterthantheanemometer-basedestimationofWTWSforturbulenceintensityatmoderatelevelorabove.Ontheotherhand,theradar-basedmeasurementdoesnotperformaswellwhencomparedwithWTWS.BycombiningLIDAR-andradar-basedmeasurements,theperformanceisslightlybetterthanWTWS,mainlyasaresultofcontributionfromLIDAR-basedmeasurement.Asaresult,theLIDAR-basedturbulenceintensitymeasurementcouldbeusedtoreplaceanemometer-basedestimatefornon-rainyweatherconditions.Furtherenhancementsofradar-basedturbulenceintensitymeasurementinrainwouldbenecessary.

简介：ZnOfilmscontainingErandGenanocrystals（nc-Ge）weresynthesizedandtheirphotoluminescence（PL）propertieswerestudied.Visibleandnear-infraredPLintensitiesarefoundtobegreatlyincreasedinnc-Ge-containingfilm.Er-related1.54μmemissionhasbeeninvestigatedunderseveralexcitationconditionsupondifferentkindsofGe,ErcodopedZnOthinfilms.1.54μmPLenhancementaccompaniedbytheappearanceofnc-Geimpliesasignificantcorrelationbetweennc-GeandPLemissionofEr3+.Theincreasedintensityof1.54μminGe:Er:ZnOfilmisconsideredtocomefromthejointeffectofthelocalpotentialdistortionaroundEr3+andthepossibleenergytransferfromnc-GetoEr3+.