简介：本期给大家带来的是来自四川省青神县青神中学高10级（6）班的罗梦同学获得一等奖的作文，看看她是如何组句谋篇的吧。

简介：本期给大家带来的是来自四川省青神县青神中学高10级（6）班的罗梦同学的一等奖作文，看看她是如何组句谋篇的吧。

简介：本期给大家带来的是来自四川省青神县青神中学高10级（6）班的罗梦同学的一等奖作文，看看她是如何组句谋篇的吧。

简介：Theeffectsofgaincompressiononthemodulationdynamicsofanopticallyinjectedgainleversemiconductorlaserarestudied.Calculationsrevealthatthegaincompressionisnotnecessarilyadrawbackaffectingthelaserdynamics.Withapracticalinjectionstrength,ahighgainlevereffectandamoderatecompressionvalueallowustotheoreticallypredictamodulationbandwidthfourtimeshigherthanthefree-runningonewithoutagainlever,whichisofparamountimportanceforthedevelopmentofdirectlymodulatedbroadbandopticalsourcescompatiblewithshort-reachcommunicationlinks.

简介：Lowgainfeedbackreferstocertainfamiliesofstabilizingstatefeedbackgainsthatareparameterizedinascalarandgotozeroasthescalardecreasestozero.Lowgainfeedbackwasinitiallyproposedtoachievesemi-globalstabilizationoflinearsystemssubjecttoinputsaturation.Itwasthencombinedwithhighgainfeedbackindifferentwaysforsolvingvariouscontrolproblems.Theresultingfeedbacklawsarereferredtoaslow-and-highgainfeedback.Sincetheintroductionoflowgainfeedbackinthecontextofsemi-globalstabilizationoflinearsystemssubjecttoinputsaturation,therehasbeenefforttodevelopalternativemethodsforlowgaindesign,tocharacterizekeyfeaturesoflowgainfeedback,andtoexplorenewapplicationsofthelowgainandlow-and-highgainfeedback.Thispaperreviewsthedevelopmentsinlowgainandlow-and-highgainfeedbackdesigns.

简介：模式获得光谱被Fourier系列扩大方法forInAs/GaAs量点(QD)测量有在不同注射水流的QD的七栈的激光。有特殊山峰的Gainspectra在大约1210nmand1300nm的短、长的波长被观察。为有1060亩m的洞长度的QD激光，长波长的山峰获得首先慢慢地增加或甚至快速作为短波长度增加的山峰获得与注射水流减少，并且当注射水流进一步增加，最后在接近浸透的价值前快速增加。

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简介：AbstractBackground:Gestational weight gain (GWG) is associated with the risk of gestational diabetes mellitus (GDM). However, the effect of weight gain in different trimesters on the risk of GDM is unclear. This study aimed to evaluate the effect of GWG on GDM during different trimesters.Methods:A birth cohort study was conducted from 2017 to 2020 in Shenzhen, China. In total, 51,205 participants were included comprising two models (early pregnancy model and middle pregnancy model). Gestational weight (kg) was measured at each prenatal clinical visit using a standardized weight scale. Logistic regression analysis was used to assess the risk of GDM. Interaction analysis and mediation effect analysis were performed in the middle pregnancy model.Results:In the early pregnancy model, the risk of GDM was 0.858 times lower (95% confidence interval [CI]: 0.786, 0.937) with insufficient GWG (iGWG) and 1.201 times higher (95% CI: 1.097, 1.316) with excessive GWG after adjustment. In the middle pregnancy model, the risk of GDM associated with iGWG increased 1.595 times (95% CI: 1.418, 1.794) after adjustment; for excessive GWG, no significant difference was found (P = 0.223). Interaction analysis showed no interaction between GWG in early pregnancy (GWG-E) and GWG in middle pregnancy (GWG-M) (F = 1.268; P = 0.280). The mediation effect analysis indicated that GWG-M plays a partial mediating role, with an effect proportion of 14.9%.Conclusions:eGWG-E and iGWG-M are associated with an increased risk of GDM. Strict control of weight gain in early pregnancy is needed, and sufficient nutrition should be provided in middle pregnancy.

简介：考虑到控制器反馈获得和观察员增加，这添加剂是围住标准的变化，为不明确的三角洲操作符系统的基于观察员的H无穷输出反馈控制器的一个设计方法在这篇论文被建议。如此的控制器的一个足够的条件在不平等(LMI)形成的线性矩阵被介绍。一个数字例子然后被给说明这个方法的有效性，就算控制器反馈获得和观察员获得被改变，也就是说，获得的控制器保证asymptotically稳定的靠近环的系统和期望的H无穷表演。

简介：Aplasmoniccavityfilledwithactivematerialisproposedtoexplainopticalswitching.Opticalproperties,includingtransmission,responsetime,andfielddistributionofon/offstate,arenumericallyinvestigated.Wedemonstratethatsuchagain-assistedplasmonicstructurecanachieveopticalswitchinginthenan-odomainandshortentheswitchingtimetothesubpicosecondlevel.Ourresultsindicatethepotentialapplicationoftheproposedstructureinopticalcommunicationandphotonicintegratedcircuits.

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简介：Therelationshipbetweengainandcarrierdensityisanalysed.Inthequantumwell(QW)lasers,initially,thegainincreasesrapidlywiththecarrierdensityandthenstartstosaturate.ItcanbeseenthatQWlasershaveahigherdifferentialgainbecauseofthestep-likestatedensity,andthatthegainsaturatesathighercarrierdensitiesbecauseoftheconstantstatedensityofthelowestsubband.Itisshownthatsimpleogarithmicgain-carrierdensityismoreaccuratethanthetraditionallinearizedformforaQWlaser.

简介：TheStokesspectruminthestimulatedRamanscattering(SRS)isverycomplicated.Inthisarticle,weusebothGaussianandLorentzapproximationtoinvestigatethegainpropertiesofmulti-pumpingbroadbandRamanamplifier,andpresentsomeschemesforflatteningthegain.Alltheresultsshowthattheflatnessofthegainspectrumiscloselyrelatedtothepumpingfrequencygrid.ByresearchingthegainpropertiesofRamanamplifiersofsuchITU-TfibersasG.652,G.653,G.655andlargeeffectiveareanon-zerodispersionflatteningfiber,wefindthattheRamangainisassociatedwiththefibertypeanditstransmissioncharacteristics,especiallyitdecreaseswiththeincreaseoftheeffectivecorearea.

简介：Arraycalibrationisimportantinengineeringpractice.Inthispaper,fastcalibrationmethodsforaULA'sgainandphaseerrorsbothinfarandnearfieldsareproposed.Inthefarfield,usingasinglesoundsourcewithoutexactorientation,thismethodhorizontallyrotatesthearrayexactlyonce,performseigenvaluedecompositionforthecovariancematrixofreceiveddata,thencomputesthegainandphaseerroraccordingtotheformulas.Inthenearfield,usingthesamesinglesoundsource,itisnecessarytorotatethearrayhorizontallyatmostthreetimes,buildequationsaccordingtogeometricrelations,thensolvethem.Usingtheformulaproposedinthispaper,sphericalwavesaremodifiedintoplanewaves.Theneigenvaluesdecompositionisperformed.Thesetwocalibrationmethodswereshowntobevalidbysimulationandarefast,accurateandeasytouse.Finally,ananalysisoffactorsinfluencingestimationprecisionisgiven.

简介：在一个磅对称的系统控制平衡获得和损失是一项相当挑战性的任务。利用Floquet理论，我们在控制磅对称的光coupler的获得和损失探索周期的调整的建设性的角色。系统的获得和损失能被使用周期的调整操作，这被发现。进一步，如此的一个原来的non-Hermitian系统能甚至被调制进高周波的Floquet方法导出的一个有效Hermitian系统。与另外的磅对称控制计划相比，因此，我们的协议能调制未破损的磅对称的范围到一个更宽的参数区域。我们的结果为控制一个现实主义的系统的获得和损失提供一条有希望的途径。

简介：Thefidelityofteleportationofcontinuousquantumvariablescanbeimprovedbytuningthelocaldisplace-mentgain.WeinvestigatetheoptimizationofthefidelityfortheteleportationofSchrodingercatstates,andofcoherentstates.Itisfoundthatthegaincorrespondingtothemaximumfidelityisnotequaltooneforthetwoinputstatesinthecaseofthesmallsqueezingdegreeoftheentanglementresource,whileunitydisplacementgainisthebestchoiceforteleportingarbitraryquantumstatesinthecaseoflargesqueezing.

简介：Financialcrisis-thedrivetointegrationofregionaleconomiesTwosalientfeaturesareillustratedintoday'sglobaleconomypattern,whichis,economicglobalizationandtheintegrationofregionaleconomies.Theintegrationofregionaleconomiesstimulatestheglobalization,whileontheotherhandintegratingcountriesthataregeographicallycloseaimstofightagainstthenegativeimpactfromglobalization,includingthefinancialcrisis.

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简介：Anewadaptivecontrolschemeisproposedformultivariablemodelreferenceadaptivecontrol(MRAC)systemsbasedonthenonlinearbacksteppingapproachwithvectorform.Theassumptiononaprioriknowledgeofthehighfrequencygainmatrixinexistingresultsisrelaxedandthenewrequiredconditionforthehighfrequencygainmatrixcanbeeasilycheckedforcertainplantssothattheproposedmethodiswidelyapplicable.Thiscontrolschemeguaranteestheglobalstabilityoftheclosed-loopsystemsandthetrackingerrorcanbearbitrarysmall.Thesimulationresultforanapplicationexampleshowsthevalidityoftheproposednonlinearadaptivescheme.

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