简介:ControlDeviceforSlits¥ZhengJianhua;GaoXiangandLuXueqiuTherearetwokindsofslitsinthebeamtransportlinesofHIRFL.Oneisawidthchange...
简介:AcalibratingdevicefortheRogowskicoilisdeveloped,whichcanbeusedtocal-ibratetheRogowskicoilhavingapartialresponsetimewithintensofnanoseconds.Itskeycomponentisastepcurrentgenerator,whichcangeneratetheoutputwitharisetimeoflessthan2nsandadurationoflargerthan300ns.Thestepcurrentgeneratoriscomposedbyapulseformingline(PFL)andapulsetransmissionline(PTL).ATEM(transverseelectromagneticmode)coaxialmeasurementunitisusedasPTL,andthecoiltobecalibratedandthereferencedstandardRogowskicoilcanbefixedintheunit.TheeffectofthedimensionsoftheTEMunitisdiscussedtheoreticallyaswellasexperimentally.
简介:Device-to-device(D2D)通讯是为改进细胞的网络的一种新兴的技术,它在认识到事情(IoT)的因特网起一个重要作用。光谱效率,精力效率和网络的产量能被合作在一个自我组织的方法在多重D2D用户之中提高。以便没有减少的通讯质量,限制D2D用户和负担的干扰离开D2D用户的精力消费,一个干扰有限多用户合作计划被建议让多重D2D用户在这份报纸解决精力问题和干扰问题。多重D2D用户使用非直角的系列由自我组织的方法形成簇。多重D2D用户被划分成不同合作单位。在不同合作单位之中没有干扰以便以合作单位限制每个D2D用户的干扰。当连接能力不能满足用户率的要求时,它将生产一个中断事件。以便评估通讯质量,D2D连接的暴行概率被考虑连接延期阀值,数据率和干扰导出。除精力可获得性和每个D2D用户的signal-to-noise比率(SNR)以外,当选择中继D2D用户以便提高接待用户的D2D的signal-to-interference-plus-noise比率(SINR)时,在D2D用户之间的距离被考虑。联合导出的暴行概率,在平均连接延期阀值之中的关系,精力的效率和能力的效率被学习。模拟结果证明多重D2D用户合作计划不能仅仅帮助卸载精力消费并且限制D2D用户的干扰,而且提高精力的效率和能力的效率的干扰有限。
简介:Themathematicalmodelofsemiconductordevicesisdescribedbytheinitialboundaryvalueproblemofasystemofthreenonlinearpartialdifferentialequations.Oneequationinellipticformisfortheelectrostaticpotential;twoequationsofconvection-dominateddiffusiontypearefortheelectronandholeconcentrations.Finitevolumeelementprocedureareputforwardfortheelectrostaticpotential,whileupwindvolumeelementschemesforthetwoconcentrationequations.ErrorestimatesinL2normforournumericalschemesarederived.
简介:MeasurementofMoistureInsidetheHermeticPackageofSemiconductorDevice①XIEXuqiang(YanshanUniversity,Qinhuangdao066004,CHN)YUTieya...
简介:Anewtechnologythatsimulatestumorshasbeenshowntoperformaswellasresearchanimalsintestingchemotherapydrugs,representingapotentialtoolforscreeningdrugsbeforetreatingapatient.Along-termgoalistoincorporatebiopsiedcancercellsfrompatientsandtesttheeffectivenessofdifferentdrugsonthepatient-derivedcells.
简介:Criticalcardiogenicshockremainsaproblemwithstaggeringmortality,withthebesthopeofsurvivaldependingontimelyandaggressiveintervention.Thisoftenrequirestheuseofextracorporealmechanicalsupportinadditiontovasoactivemedicationstomanagepatientsthroughtheirinitialinsult.Thedecisiontousesuchsupportmustbemadeearlyintheclinicalpresentation,andisbestdoneinamultidisciplinaryfashion.Inthisarticle,wereviewtheliteratureandprovideanalgorithmforthetreatmentofcardiogenicshock.
简介:Forthelargenumberofnonlineardegradationdevicesexistinginaproject,theexistingmethodshavenotsystematicallystudiedtheeffectsofrandomeffectontheremaininglifetime(RL),theaccuracyandefficiencyoftheparametersestimationarenothigh,andthecurrentdegradationstateofthetargetdeviceisnotaccuratelyestimated.Inthispaper,anonlinearWienerdegradationmodelwithrandomeffectisproposedandthecorrespondingprobabilitydensityfunction(PDF)ofthefirsthittingtime(FHT)isdeduced.Aparameterestimationmethodbasedonmodifiedexpectationmaximum(EM)algorithmisproposedtoobtaintheestimatedvalueoffixedcoefficientandthepriorivalueofrandomcoefficientinthemodel.Theposteriorvalueoftherandomcoefficientandthecurrentdegradationstateoftargetdeviceareupdatedsynchronouslybythestatespacemodel(SSM)andtheKalmanfilteralgorithm.ThePDFofRLwithrandomeffectisdeduced.AsimulationexampleisanalyzedtoverifythattheproposedmethodhastheobviousadvantageovertheexistingmethodsinparameterestimationerrorandRLpredictionaccuracy.
简介:Thispaperisconcernedwithwatersavingforwater-loopcoolingtowersysteminpowerplants.Anewlydevelopedwatersavingdeviceofswirlingflowispresented.Thekeypointisthatthenewwatersavingdevicemakesthesteamswirlupalongthedevicewallratherthanengenderlaminarflowinacorrugatedplate.Thecorrugatedplatedevicecansaveapproximately10percentofthetotallostwater.Incontrasttothescalemodelofcorrugatedplatewatersavingdevice,experimentalanalyseshavedemonstr...
简介:根据我们的经验,经历割礼的病人主要关于疼痛和阴茎外观被担心。我们进行了未来的使随机化的试用估计一台新可处理的割礼缝术设备(DCSD)的好处。942个病人的一个总数同等地被划分成三个组(常规割礼,商戒指和可处理的缝术设备组)。在DCSD组的病人是有化合物5%lidocaine乳脂的anesthetized,其它与2%lidocaine阴茎块。操作时间,intra起作用的血损失,切口愈合时间,intra起作用、手术后的疼痛,阴茎外观和全面满足度被测量。操作时间和intra起作用的血损失与传统的组相比在商戒指和缝术设备组是显著地更低的(P<;0.001)。Intra起作用的疼痛与另外的二个组相比是在缝术设备组的更少(P<;0.001);而手术后的疼痛在与另外的二个组相比的传统的组是更高的(P<;0.001)。设备(80.57%)和商戒指(73.57%)组织的在缝术的病人是与常规割礼组相比对阴茎外观满意的更多(20.06%,P<;0.05)。在缝术设备组的病人也比传统的组快显著地愈合了(P<;0.01)。全面满足率在缝术设备组(78.66%)更好与相比常规(47.13%)并且商戒指(50.00%)组(P<;0.05)。DCSD和lidocaine乳脂的联合导致了更短的操作和切口愈合时间,减少了intra起作用、手术后的疼痛并且改进了对化妆外观的耐心的满足。
简介:Theultrafastfiberlaserhasattractedagreatdealofresearchinterestduetoitslowcost,highefficiency,andsimplemaintenance.Opticalpassivedevicesarevitalpartsofafiberlaser.Inordertoobtainafiberlaserwithhighquality,opticalpassivedeviceswithhighperformancearerequired.Here,wedemonstrateahighlyintegratedopticaldevicewiththecombinationofasaturableabsorber(SA),coupler,isolator,wavelengthdivisionmultiplexer,anderbium-dopedfiber.Thebuilt-inSAhasamodulationdepthof7%andcanwithstandhighpumppowerduetotheuniquestructureoftheproposeddevice.Theproposeddeviceisappliedtoanultracompactfiberlaser,whichgreatlysimplifiesthelaserstructureandreducesthesizeoftheproposedlaser.Thecentralwavelength,pulseduration,repetitionrate,andsignal-to-noiseratiooftheoutputsolitonare1560nm,1.06ps,25.8MHz,and50dB,respectively.Theproposeddevicehasgreatpotentialforapplicationinhigh-powerandhigh-frequencyfiberlasers.Theproposedultracompactfiberlaserhasimportantapplicationsinopticalcommunication,opticalsensing,opticalfrequencycombs,andmicromachining.
简介:InthesouthernpartofChina,duetotherichrainfallsandfavourablytopographicallandscape,thereisabundanthydraulicenergyresourcescontainedinthecountlesssmallstreamsandriversinthemountainousandsemi-mountainousareas.Besidesthesmallhydropowergenerationwhichtransfersthepotentialenergytotheelectricalpower,thereisothertechnologyavailabletoutilisethepotentialenergydirectlyforthewaterliftingintheirrigationanddecentraliseddo-mesticwatersupplyinthevillagelevel.Thispaperintroducesthebasicprincipleofthehydraulicramop-erationanddescribestheapplicableopportunitiesforthehydraulicram.