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简介：Incontrastwiththeconventionalinjectorconsistingofdcgun,chopper,subharmonicbuncherand/orfundamentalbuncher,amicrowaveguncancooperatewithanalphamagnetasamorecompacthighbrightnessinjectorforthededicatedrflinearacceleratorsdrivinginfraredfreeelectronlasers(FELs).SuchaconcepthasbeenputintopracticeintheMARKIIIFELandwillbeusedintheBeijingFreeElectronLaser(BFEL)aswell.Inthispaper,thephasespread,energyspread,energyspread,emittancegrowthandintensityvariationofasingleelectronmicrobunchinsuchanFELacceleratorsystemareinvestigatedusingSUPERFISHandPARMELA.

简介：Kidswhosmokeliketothinkthattheyareimmortal②-oratleastthatiftheystopintime,theirlungswillheal.Butareportinlastweek'sJournaloftheNationalCancerInstitutesuggestsearlysmokingmaytrigger③changesinDNA④thatputyoungsmokersathigherriskforcancereveniftheylaterquit.Researchersstudyinglungcancerpatientsroundthatthosewiththeworstgenetic⑤damagewerenotthosewhosmokedlongestbutthosewhostartedyoungest.What'smore,theearliertheystarted,themorewerethedamage.

简介：Inthispaper,thesystemandsubsystemforecastmodelsforfiringaccuracyhavebeenbuiltbymeansoftheoryofGreySystemForecast.Ithasprovidedascientificforecastingmethodformicro-errorcontrolandmacro-error-controlandimprovingthefiringaccuracy.

简介：喂壳的速度是影响射击能力的海军的枪的一个重要因素。一个活泼的喂壳的系统被设计保证喂theshell任务的快实现。基于活泼的喂壳的系统的作文，升起技术被学习。工作原则被讨论，hoist的水力的气压系统被构造。水力的压力柱体和蓄电池被分析并且计算。最后，PRO/E和亚当斯被用来模仿hoist和它的水力的系统。这类虚拟原型提供一个好方法实行，这被发现一个物理原型。

简介：ThemethodofproducingacompleteMRIimageisbasedontheanalysisoffreeinductiondecay.ItmainlystudieswhenandhowmagneticvectorrevestsitsinitialstateafterRFpulse,butneglectstheeffectoftheRFform.Inthispaperwemainlystudythis.WegivethemathematicexpressionofRFpulsewhichcantheoreticallyimproveimage（?）ality.InMRI,B1（t）isthealternateelectromagneticexcitationfield,itcanbeexpressedasfollows:

简介：Inthisstudy,SiO_xfilmsweredepositedbyadielectricbarrierdischarge(DBD)plasmagunatanatmosphericpressure.TherelationshipofthefilmstructureswithplasmapowerswasinvestigatedbyFouriertransforminfraredspectroscopy(FTIR),andscanningelectronmicroscope(SEM).Itwasshownthatanuniformandcross-linkingstructurefilmwasformedbytheDBDgun.Asanapplication,theSiO_xfilmsweredepositedonacarbonsteelsurfacefortheanti-corrosionpurpose.Theexperimentwascarriedoutina0.1MNaC1solution.Itwasfoundthataverygoodanti-corrosivepropertywasobtained,i.e.,thecorrosionratewasdecreasedc.a.15timesin5%NaClsolutioncomparedtothenon-SiO_xcoatedsteel,asdetectedbythepotentiodynamicpolarizationmeasurement.

简介：TheRFsystemforTESLArequiresacomprehensiveinterlocksystem.Usuallyinterlocksystemsareorganizedinahierarchicalway,Inordertoreacttodifferentfaultconditionsinafastandflexiblemanneranonhierarchicalorganizationseemstobethebettersolution,AttheTESLATestFacility(TTF)atDESYwewillinstallanonhierarchicalinterlocksystemthatisbasedonuserdesgnedreprogrammablegate-arrays(FPGA's)whichincorporateanembeddedmicrocontrollersystem.ThissystemcouldbeusedlaterfortheTESLAlinearcolliderreplacingastrictlyhierarchicaldesign.

简介：IMPCSRRFGroupcooperatingwithBINPhasfulfilledthefollowingprojects.PCIbasedRFsignalgenerator;PLDcenteredRFstationinterlockandsurveillanceunit;Highfrequencyanalogsignalprocessingunits;CVIandWindowsplatformbasedmonitorandoperationinterface.

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简介：本文主要介绍了RF电缆的时域反射特性。以及通过时域反射测量对电缆的特性进行分析，判定影响其反射参数的主要原因。

简介：摘要目的观察研究3种类风湿因子IgM-RF、IgG-RF、IgA-RF及抗CCP检测对诊断类风湿性关节炎的价值。方法选取在我院治疗的类风湿性关节炎患者100例（2015年6月—2016年6月期间）作为甲组，选取同期其他结缔组织疾病患者（80例）作为乙组以及正常体检者（76例）作为丙组，均进行IgM-RF、IgG-RF、IgA-RF及抗CCP的检测，对其检测结果进行观察分析。结果甲组类风湿性关节炎患者IgM-RF、IgG-RF、IgA-RF及抗CCP检测后的阳性率分别为91.00%、37.00%、86.00%、79.00%，均显著高于乙组和丙组，P＜0.05；甲组患者血清3种RF以及抗CCP的浓度均高于其他两组，P＜0.05。结论IgM-RF、IgG-RF、IgA-RF及抗CCP检测对类风湿性关节炎的诊断价值较高，值得广泛推广。

简介：全球电子商品监控（EAS）供应商和零售行业的RFID解决方案公司保点系统推出其MicroFlex解决方案,旨在帮助零售商减少过去难以防范的商品外部丢失。大多数零售商都选择进行公开展示商品让用户在购买前进行试用,通过实现与产品的全面交互来改善客户体验,同时防止盗贼窃取。

简介：Anumericaltwo-fluidsimulationofthenon-ionizedradiofrequency(rf)sheathmodel,hasbeencarriedout.Thismodelis'global'andthusapplicabletothesheath,pre-sheathandplasmaregions,Inthemodelallvariablesintheionforcebalanceequation,includingtheelectricalforce,ionpressureandneutralparticlefriction,areconsidered.Themodelissolvedthroughafinitedifferenceschemeandsheathcharacteristicsareobtained.Theeffectsoftheiontemperatureonboththecollisionlessandcollisionalsheathcharacteristicsarediscussed.Thenitisconcludedthat1)themodelisinagoodagreementwithBohmTheorem;2)theiontemperaturehassignificanteffectsontherfsheathcharacteristics.Theeffectsarefarmoresignificantonacollisionalrfsheaththanonacollisionlesssheath.

简介：这份报纸在内并且在高速度的Oxy燃料(HVOF)外面象煤气的流动一样分析涂层粒子的行为由使用quasi-one-dimensional分析和数字模拟的热水花枪。在现在的分析的HVOF枪是一个向轴的方向有2.0的设计马赫数字的对称的会聚分叉的嘴。从现在的分析，速度的分布和飞在内并且在HVOF枪外面的涂层粒子的温度被预言。在现在的方法计算的枪的出口的涂层粒子的速度和温度与以前的试验性的结果同意很好。因此，计算的现在的方法被认为为预言HVOF气体和粒子流动有用。关键词可压缩的流动-超声的喷气-热水花-HVOFCLC数字O357.4+2

简介：据参加微波技术与工艺研讨会（MTT-S）的一个专家讨论小组，RFCMOS可能还未迎来黄金时段，至少是在手机功率放大器领域，而砷化镓（GaAs）将继续在该领域处于主导地位。诺基亚的RF工程与技术经理FazalAli估计．2004年手机出货量约为6．645亿部，每部电话中有两或三个放大器，总计接近20亿个。他问这些功率放大器（PA）中有多少是CMOS，显然暗示答案是“不太多”。

简介：频率合成是手机中最基本不可缺少的一个重要环节，频率合成器是一个高性能的频率源，它可使得从大量频率中选择某一工作频率变得极其精确、迅速和方便。频率合成技术从早期的直接合成发展到锁相合成是一次技术上的飞跃，锁相频率合成技术是基于锁相环路的

简介：对脊柱骨折施行RF系统内固定术的10例进行了护理。认为加强对患者的心理护理,正确指导患者的饮食,充分做好术前准备,加强术后护理可有效地预防各种并发症的发生,术后应正确指导和协助患者进行功能锻炼,预防肌肉萎缩和关节僵直,早期下床活动。

简介：PolycrystallineZnOfilmswerepreparedonglasswaferusingZntargetsbyradiofrequency(RF)reactivesputteringtechniqueunderdifferentdepositionconditions.X-raydiffraction(XRD)andopticaltransmittancespectrumwereemployedtoanalyzethestructureandopticalcharacterofthefilms.Thestrainandstressinfilms,aswellasthepackingdensityarecalculatedintermsofrefractiveindexoffilmsmeasuredwithanellipticpolarizationanalyzer.ItisthedepositionconditionsthathavegreateffectsonthestructuralandopticalpropertiesofZnOfilms.Undertheoptimalconditions,theonlyevidentpeakinXRDspectrumwas(002)peakwiththefullwidthathalfmaximum(FWHM)of0.20°showingthegrainsizeof42.8nm.Thepackingdensity,thestressin(002)planeandtheaverageopticaltransmittanceinthevisibleregionwereabout97%,-1.06×109N/m2and92%,respectively.