简介：Waveguideinvariantiswidelyusedinunderwatertargetpassiveranging.Inshallowwaterwithuniformsoundspeedprofile,thevalueofwaveguideinvariantisapproximatelyaconstant,whileinshallowwaterwiththermocline,itvariesinawiderange.Thewaveguideinvariantdistributionsandstriationsinthesetwoconditionsareanalyzedrespectively.Onthebasisofwavenumberdifferencebetweenreflectedmodesandrefractedmodes,awavenumber-frequencydomainfilteringtechniqueisproposedtoseparatethetwogroupsofmodes.Therequiredrelationshipbetweenarrayelementspace,totalarraylengthandtargetazimuthforeffectiveapplicationisdiscussed.Finally,thesimulationresultsindicatethatinshallowwaterwithathermocline,refractedmodescanbeeffectivelyfilteredoutusingthewavenumber-frequencydomainfilteringtechniqueandthetarget’srangeisestimatedaccurately.

简介：Parameterquantificationprincipleofthree-dimensional(3-D)fluorescentspectrumanditsrealizationtechniquearestudied.Thepotablefiberopticfluorescentmeasurerformineraloilisgiven.Threeparametersoftheexcitinglightwavelength.theeavelengthandtheintensityofthefluorescentlightexcitedbythemeasuredoilareexpressedwith3-Dcoordinatesandareprocessedsoastobesampledagainandtobecurvefitted.

简介：一根双横梁在红外线附近的分光计被开发在紧张补偿水吸收和仪器的飘移。分光计可以被用于单个、双的横梁大小，并且二个操作模式被比较。结果证明双横梁技术在单个横梁测量消除仪器的飘移，因此，系统的稳定性增加超过20%。水吸收上的双横梁系统的赔偿被胖内容的测量在牛奶验证。结果证明光谱数据比传统的单个横梁模式基于两倍横梁模式得到更好的刻度模型和更低的预言错误。CLC数字TH744.1-TN219-O433.1这个工作被中国(号码2004BA706B12)和天津(No.023800411)的自然科学关键基础的第10五个年计划支持。

简介：Intheair-waterquantumkeydistribution（QKD）,theirregularseasurfacehassomeinfluenceonthephotonpolariza-tionstate.Thewindisconsideredasthemainfactorcausingtheirregularity,sothemodelofirregularseasurfacebasedonthewindspeedisadopted.Therelationshipsofthequantumbiterrorratewiththewindspeedandtheinitialincidentanglearesimulated.Therefore,themaximumsecuretransmissiondepthofQKDisconfirmed,andthelimita-tionofthewindspeedandtheinitialincidentangleisdetermined.Thesimulationresultsshowthatwhenthewindspeedandtheinitialincidentangleincrease,theperformanceofQKDwillfalldown.Undertheintercept-resendattackcondition,themaximumsafetransmissiondepthofQKDisupto105m.Torealizesafecommunicationsinthesafedivingdepthofsubmarines（100m）,theinitialincidentangleisrequestedtobenotexceeding26~,andwiththeinitialincidentan~leincreased,thelimitationofwindspeedisdecreased.

简介：Demandresponse(DR)isgainingmoreandmoreimportanceinthearchitectureofpowersystemsinacontextofflexibleloadsandhighshareofintermittentgeneration.ChangesinelectricitymarketsregulationinseveralcountrieshaverecentlyenabledaneffectiveintegrationofDRmechanismsinpowersystems.Throughitsflexiblecomponents(pumps,tanks),drinkingwatersystemsaresuitablecandidatesforenergy-efficientDRmechanisms.However,thesesystemsareoftenmanagedindependentlyofpowersystemoperationforbotheconomicandoperationalreasons.Indeed,asufficientlevelofeconomicviabilityandwaterdemandsriskmanagementarenecessaryforwaterutilitiestointegratetheirflexibilitiestopowersystemoperation.Inthispaper,weproposedamathematicalmodelforoptimizingpumpschedulesinwatersystemswhiletradingDRblocsinaspotpowermarketduringpeaktimes.Uncertaintiesaboutwaterdemandswereconsideredinthemathematicalmodelallowingtoproposepowerreductionscoveringthepotentialriskofreal-timewaterdemandforecastinginaccuracy.NumericalresultswerediscussedonarealwatersysteminFrance,demonstratingbotheconomicandecologicalbenefits.