简介：TheperformancesofnonlinearWDMsystemswithdifferentdutycyclearecomparedbymeansofnumericalsimulation.Thenumericalresultsshowthattheopticalpulsewithdutycycleof0.5issuperiortotheconventionalNRZmodulationschene.Theconclusionisdifferentfromthatofsomereferences.Thereasonisthatintersymbolinterferenceisnotincludedinsomereferences.Infact,intersymbolinterferenceplaysanimportantroleinmonlinearWDMsystem.Althoughthelargerthedutycycleis,thestrongertheeffectofthecross-phasemodulationandself-phasemodulationonnonlinearWDMishowever,thelargerthedutycycleis,thestrongertheintersymbolinterferenceis.

简介：Anovelandsimplefibergratingsensorbasedonhigh-duty-cyclesamplefiberBragggratingisproposedanddemonstratedexperimentally.Thistypeofsensorcanmeasurestrainandtemperaturesimultaneouslywithmeritsoflowcost,highsensitivityandimmunitytoelectro-magneticinterference.Thesensorhasanaccuracyof20μεand0.8℃overastrainrangeof500～1500μεandatemperaturerangeof5～36℃underexperimentalconditions.

简介：在这份报纸，在滑动模式(SM)控制系统啁啾上的采样间隔的影响被考虑。描述的功能(DF)途径被采用在采样SM控制分析啁啾的特征。由DF计算和限制周期存在条件，一个不稳定的限制周期和二个稳定的限制周期在SM控制系统被发现。二个限制周期的频率和振幅能被图形的计算也估计。啁啾的参数的评价精确性被模拟评估。模拟的结果证明系统能收敛到一大并且从不同起始的条件的一个小限制周期。

简介：Low-duty-cyclemechanismscanreducetheenergyconsumptionsignificantlyinwirelesssensornetworks(WSNs).Sensorsstaydormantmostofthetimetosavetheirenergyandwakeupbasedontheirneeds.However,suchatechnique,whileprolongingthenetworklifetime,setsexcessivechallengesforreducingtheend-to-end(E2E)delaywithinthenetwork.Inthispaper,thecentralizedcluster-basedlocationfinding(CCLF)algorithmisproposedtoreducethehighlatencyinlow-duty-cycleWSNsbyfindingasuitablepositionforthesink.Thealgorithmismainlycomposedofthreesteps:a)theclusterconstruction,b)thefastlook-uptable(FLU-table)construction,andc)thesinklocationdecision.ThesimulationresultsshowthattheperformanceoftheCCLFalgorithmissignificantlysimilartothatoftheoptimalalgorithm.Moreover,theCCLFalgorithmrequireslessoperationtimecomparedwiththeoptimalalgorithm.