简介：Intramolecularvibrationsoflargemacromoleculesresideintheterahertzrange.Inparticular,proteinvibrationsarecloselyspacedinfrequency,resultinginanearlycontinuousvibrationaldensityofstates.Thisdensityofvibrationsinterfereswiththeidentificationofspecificabsorptionlinesandtheirsubsequentassociationwithspecificfunctionalmotions.Thischallengeiscompoundedwiththeabsorptionbeingdominatedbythesolventandlocalrelaxationalmotions.Astrategyforremovingtheisotropicrelaxationallossandisolatingspecificvibrationsistousealignedsamplesandpolarization-sensitivemeasurements.Here,wedemonstrateatechniquetorapidlyattaintheanisotropicresonantabsorbanceusingterahertztimedomainspectroscopyandaspinningsample.Thetechnique,modulatedorientation-sensitiveterahertzspectroscopy(MOSTS),hasanonzerosignalonlyforanisotropicsamples,asdemonstratedbyacomparisonbetweenasiliconwaferandawiregridpolarizer.Forsucroseandoxalicacidmolecularcrystals,theMOSTSresponseisinagreementwithmodeledresultsfortheintermolecularvibrations.Further,wedemonstratethat,eveninthepresenceofalargerelaxationalbackground,MOSTSisolatesunderlyingvibrationalresonances.

简介：Arecentlyintroducednonlinearmodelundergoesevaluationsbasedontwoisotropicturbulentcases:aUniversityofWiscosion-MadisoncaseatamoderateReynoldsnumberandaJohnsHopkinsUniversitycaseatahighReynoldsnumber.Themodelusesanestimationofthesubgrid-scale(SGS)kineticenergytomodelthemagnitudeoftheSGSstresstensor,andusesthenormalizedvelocitygradienttensortomodelthestructureoftheSGSstresstensor.Testingisperformedforthefirstcasethroughacomparisonbetwee...

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简介：Theglassytransitionofthepolyethyleneterephthalate(PET)sampleswhichhavebeensubjectedtosolventinducedcrystallization(SINC)wasinvestigatedbymodulateddifferentialscanningcalorimetry(MDSC)anddensitymeasurement.Thedif-ferentialofheatcapacitysignal,dC_p/dTfromMDSC,wasusedtomonitortheSINCprocess.ItrevealsthattheT_gtemperatureshiftstohighervaluewiththeadvancementofSINC.Whenthetoluene-immersingtimewaslonger(168h),thedetectionofT_gbecomemoredifficult,becausesomesmallerpeaksemergedatthelowertemperaturesandtheseareexplainedasthemovementofsmallsegmentsintheamorphousregion.TheseobservedresultsareduetothemorphologyandstructureintroducedbytheSINCprocess.

简介：这个工作被奉献给从被另一Markov链调制的随机的序列(称为的主要序列)的实验措施产生的随机的系统。Markov链被用来为没在主要序列被代表的随机的分离事件建模。一个新奇特征是代替在实验措施序列的平常的可伸缩，作者考虑在空间和时间可伸缩，它导致新限制结果。在宽广条件下面，实验措施的一个放大序列微弱地收敛到连续时间的Markov链调制的很多座Brownian桥，这被显示出。分枝和特殊情况也被考虑。

简介：ThefinitedimensionoftheglobalattractorsforthesystemsoftheperturbedandunperturbeddissipativeHamiltonianamplitudeequationsgoverningmodulatedwaveareinvestigated,Aninterestingresultisalsoobtainedthattheupperboundofthedimensionoftheglobalattractorfortheperturbedequationisindependentofε.

简介：Wepresentamethodtogenerateafrequency-doubledmicrowavesignalbyemployingacoupling-modulatedringresonator.CriticalcouplingisachievedwhentheresonatorintrinsiclossisperfectlybalancedbytheexternalcouplingenabledbyaMach–Zehnderinterferometercoupler.Thehighsuppressionofthecarrierleadstoacleantwo-toneopticalsignalwiththefrequencyintervaltwotimeslargerthanthatoftheinputmicrowavefrequency.Thebeatingofthetwo-tonesignalataphotodiodegeneratesthefrequencyupconvertedmicrowavesignal.Atheoreticalmodelisestablishedtoanalyzethemodulationprocessandthemicrowavesignalgeneration.Experimentalresultsshowthattheelectricalharmonicsuppressionratioisaround~20dB(29dB)foraninputmicrowavesignalwith5dBm(10dBm)power.

简介：ConsiderastoragemodelfedbyaMarkovmodulatedBrownianmotion.Weprovethatthestationarydistributionofthemodelexitsandthattherunningmaximumofthestorageprocessovertheinterval[0,t]growsasymptoticallylikelogtast→∞.

简介：Theevolutioncharacteristicsofamatter-wavebrightsolitonareinvestigatedbymeansofthevariationalapproachinthepresenceofspatiallyvaryingnonlinearity.Itisfoundthattheatomdensityenvelopeofthesolitonischangedasaresultofthespatialvariationofthes-wavescatteringlength.Thestablesolitoncanexistinappropriateinitialconditions.Themovementofthesolitondependsonthesignandvalueofthecoefficientofspatiallymodulatednonlinearity.Thesetheoreticalpredictionsareconfirmedbythefullnumericalsimulationsoftheone-dimensionalGross-Pitaevskiiequation.

简介：当常规时近地的声学的雷射摄影术不技术是健全的地由调制信号导致了的appliedto，modulating频率不能被重建的结果揭示。解决这个问题，一不，为调制健全来源的分析方法论被建议。第一，Hilbert变换被介绍使解调信号，然后modulating部件被重建由不技术。数字模拟和实验结果证明精确重建分析能被建议方法获得。

简介：Inopticalscanningholography,onepupilproducesasphericalwaveandanotherproducesaplanewave.Theyinterferewitheachotherandresultinafringepatternforscanningathree-dimensionalobject.Theresolutionofthehologramreconstructionisaffectedbythepointspreadfunction(PSF)oftheopticalsystem.Inthispaper,wemodulatethePSFbyaspiralphaseplate,whichsignificantlyenhancesthelateralanddepthresolution.Weexplainthetheoryforsuchresolutionenhancementandshowsimulationresultstoverifytheefficacyoftheapproach.

简介：AbstractImportance:Irradiation treatment for pediatric patients with neuroblastoma represents a major challenge due to the pediatric dose limits for critical structures and the necessity of sufficient dose coverage of the clinical target volume for local control.Objective:To investigate dosimetric differences between tomotherapy (TOMO) and volumetric-modulated arc therapy (VMAT) as retroperitoneal radiotherapy for children with neuroblastoma.Methods:Eight patients who received retroperitoneal radiotherapy for neuroblastoma were selected for comparison of TOMO and VMAT treatment plans. The Dmin, Dmax, Dmean, D95, D2, and D98 of planning target volume (PTV), conformity index (CI), heterogeneity index (HI), and organs at risk (OARs) parameters were compared. Delivery machine unit (MU) and image-guide radiotherapy solution results were also compared.Results:All patients received a cumulative dose of 19.5 Gy to the PTV. VMAT showed higher CI (0.93 ± 0.02), compared with TOMO (0.87 ± 0.03, P < 0.001). Notably, the average PTV HI was significantly better using TOMO (1.05 ± 0.01) than VMAT (1.08 ± 0.02, P = 0.003). Compared with VMAT, the Dmin, D95, and D98 all exhibited increases in TOMO; Dmax variation was less than 1% in TOMO. The D0.1cc for the spinal cord and D2cc for the small intestine were better in TOMO in terms of OARs. However, TOMO had more MUs and required a longer delivery time.Interpretation:Both planning techniques are capable of producing high-quality treatment plans. TOMO is superior for PTV coverage, but inferior for CI. TOMO requires extra treatment time; its cost is greater than the cost of VMAT.

简介：Weobserveanonlinearresponseofadual-wavelengthNd:YAGlaserwhensubjectedtolow-frequencyperiodicmodulationsofcavitylosses.Themodulationfrequencyisfarfromtherelaxationoscillationfrequency.Theharmonicresonancesofthetwolaserwavelengthsassociatedwithantiphaseintensityoscillationsaredemonstratedandresonancesuptothefourthorderwereobserved.Forrelativelyweakmodulation,theintensityoscillationfrequencyofthelaserisequaltothemodulationfrequency.Harmonicresonancesoccurunderastrongermodulation.Wefindthatmoreharmoniccomponentsappearwhenthemodulationfrequencyisincreased.Furthermore,withenhancingthemodulation,thedominantfrequencyoftheintensityoscillationsofbothwavelengthsisshiftedtowardthehigher-orderharmonicfrequency.更多还原

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简介：Inthispaperthedesignproblemofperfect-reconstructioncosine-modulatedQMFbankshasbeenformulatedasaquadratic-constrainedleast-squares(QCLS)minimizationprobleminwhichallconstrainedmatricesoftheQCLSoptimizationproblemaresymmetricandpositivedefinite.AcostfunctionwhichisaconvexfunctionofdesiredprototypefiltercoefficientsisconstructedsothatthiskindofQCLSoptimizationproblemscanbeefficientlysolved.Soaglobalminimizerofthisproblemcanbeeasilyobtained.Resultsoftwodesignexamplesarepresentedtosupportthederivationsandanalyses.

简介：Cerenkovwakeamplificationcanbeusedasanacceleratingscheme,inwhichatriggerbunchofelectronspropagatinginsideacylindricalwaveguidefilledwithanactivemediumgeneratesaninitialwakefield.Duetothemultiplereflectionsinsidethewaveguide,thewakemaybeamplifiedsignificantlymorestronglythanwhenpropagatinginaboundlessmedium.Sufficientlyfarawayfromthetriggerbunchthewake,whichtravelswiththesamephasevelocityasthebunch,reachessaturationanditcanaccelerateasecondbunchofelectronstrailingbehind.ForaCO2gasmixtureournumericalandanalyticalcalculationsindicatethatashortsaturationlengthandahighgradientcanbeachievedwithalargewaveguideradiusfilledwithahighdensityofexcitedatomsandatriggerbunchthattravelsatavelocityslightlyabovetheCerenkovvelocity.Toobtainastablelevelofsaturatedwakethatwillbesuitableforparticleacceleration,itiscrucialtosatisfythesingle-moderesonancecondition,whichrequireshighaccuracyinthewaveguideradiusandtheratiobetweentheelectronphasevelocityandtheCerenkovvelocity.Forsingle-modepropagationourmodelindicatesthatitisfeasibletoobtaingradientsashighasGVm-1inawaveguidelengthofcm.

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简介：在吝啬地的三地点的BoseHubbard模型以内，偶极的bosonic气体与的通道动力学一周期性地，散布的s波浪的调整被调查。系统经历通道(CDT)的协调破坏转移在下邻居偶极子偶极子相互作用，所在地的相互作用和散布的调制s波浪之中源于相关效果的复杂、富有的协调通道(CT)。特别地，为产生CT(CDT)散布的调制s波浪的区域是最宽(最狭窄)什么时候所在地的相互作用和下邻居偶极子偶极子相互作用一些相关与通道精力和系统的相互作用精力有关仔细珍视，它是。为出现CDT的相关的值能理论上从通道精力和系统的相互作用精力被获得。