简介:昨日,听梁玉嵘的《十爱》,张雨林出品的CD碟片中的一首歌曲打动了我,那就是“顺流逆流”。这是一首老歌,吟唱至今,仍然那样动听,就算是对粤语一知半解的我也愿哼上几句。是缠绵的南腔,婉转的旋律,是深情的向望,无尽的遐思,让红尘中人有了一份人生的感悟,也有了一份淡淡的寄托。
简介:Inthispaper,anewadaptiveoptimalguidancelawwithimpactangleandseeker’sfield-of-view(FOV)angleconstraintsisproposed.Tothisend,thegeneralizedoptimalguidancelawisderivedfirst.Achangeableimpactangleweighting(IAW)coefficientisintroducedandusedtomodifytheguidancelawtomakeitadaptiveforallguidanceconstraints.Afterintegratingtheclosed-formsolutionoftheguidancecommandwithlinearizedengagementkinematics,theanalyticpredictivemodelsofimpactangleandFOVanglearebuilt,andtheavailablerangeofIAWcorrespondingtoconstraintsiscertain.Next,acalculationschemeispresentedtoacquirethereal-timevalueofIAWduringtheentireguidanceprocess.Whenapplyingtheproposedguidancelaw,theIAWwillkeepsmalltoavoidatrajectoryclimbinguptolimitFOVangleataninitialtimebutwillincreasewiththeclosingtargettoimproveimpactpositionandangleaccuracy,therebyensuringthattheguidancelawcanjuggleordersofguidanceaccuracyandconstraintscontrol.
简介:这研究调查堵塞的multitone的频率偏移量怎么影响调音的快跳跃频率的二进制频率移动(FFH/BFSK)自我使添加剂白人Gaussian噪音(AWGN)正常化(SNZ)在\O下面的接收装置。FFH/BFSKSNZ接收装置的平均bit-error-rate(BER)表情和有频率的通讯系统multitone抵消为理解模拟更好结果的缘故堵塞的FFH/BFSK传播光谱(SS)的普通BER表情。当堵塞力量是中等的时,有在堵塞的最糟的casemultitone(MTJ)和AWGN下面的差异的FFH/BFSKSNZ接收装置的BER性能受不了multitone堵塞的模拟结果表演是频率偏移量,它被几模拟验证,不同频率偏移量在堵塞的multitone设置了。因此,在堵塞的multitone下面的FFH/BFSKSNZ接收装置能在堵塞的multitone的频率偏移量的帮助下被作斗争。
简介:UnlikethepreviousresearchworksanalyzingthestabilityoftheT-S(Takagi?Sugeno)fuzzymodel,anextensiononthestabilityconditionofT-Sfuzzysystemswithadifferentstrategyisprovided.Inthestrategyanewvariable,whichisrelativetothegradeoffuzzymembershipfunction,isintroducedtothestabilityanalysisandanewstabilityconclusionisdeduced.Thedefinitionofstabilityconditioninthispaperisdifferentfrompreviousworks,thoughtheyaresimilarinform.Withtheproposedmethod,thesimulationinflightcontrollawshowsabettereffectiveness.
简介:RFLDMOSs}/率管具有高输出功率、高增益、高线性、良好的热稳定性等优点,广泛应用于移动通信基站、数字广播电视发射以及射频通信领域、微波雷达系统。阻抗匹配是LDMOS~率管应用电路设计的关键任务,LDMOS功率管匹配电路的主要任务是实现功率管的最大功率传输。文中选择中国电子科技集团公司第58研究所研制的S波段10wLDMOS功率管,利用微波仿真工具ADS设计外匹配电路。经过精心调试后,s波段LDMOSs}/率管输入回波损耗、增益、输出功率、效率、谐波等技术指标达到设计要求。完成匹配电路设计的S波段LDMOS功率管在3.1~3.4GHz频率范围内,输出功率大于13.8W,功率增益大于12.4dB,效率大于37.9%。
简介:Anultra-highspeed1:2demultiplexerforopticalfibercommunicationsystemsisdesignedutilizingtheIHP0.25μmSiGeBiCMOStechnology.Thelatchofthedemultiplexercorecircuitisresearched.Basedonthecurrentmeasurementcondition,ahigh-gainandwide-bandwidthclockbufferisdesignedtodrivelargeload.Transmissionlinetheoryforultra-highspeedcircuitsisusedtodesignmatchingnetworktosolvethematchingproblemamongtheinput,outputandinternalsignals.Thetransientanalysisshowsthatthisdemultiplexercandemultiplexone100Gb/sinputintotwo50Gb/soutputs.Thechipareaofitis0.7mm×0.47mm,theinputandoutputdataarebothat400mVP-PPCMLstandardvoltagelevel,andthepowerconsumptionoftheICis900mWatthepowersupplyof-4V.