简介：Wavelength-dependentACStarkshiftsandmagicwavelengthsoftheterahertzclocktransitionsbetweenthemetastabletripletstates6s5d3D1and6s5d3D2areinvestigatedwithconsideringtheopticallatticetrappingofbariumatomswiththelinearlypolarizedlaser.Thetrapdepthsandtheslopesoflightshiftdifferencewithdistinctmagicwavelengthsoftheopticallatticesarealsodiscussedindetail.Severalpotentiallysuitableworkingpointsfortheopticallatticetrappinglaserarerecommendedandselectedfromthesemagicwavelengths.

简介：Inordertorealizethemodulardesignofthemicrogrid,thispaperproposedanewmodulartopologyfortheAC-DCmixedmicrogrid.Inthattopology,theACmicrogridunitandtheDCmicrogridunitwerepackagedtogetherbytheback-to-backconverter.Thebattery-supercapacitorhybridenergystoragesystemwasconnectedtotheDCbusofback-to-backconverter.Bythereasonabledesignonthebattery-supercapacitorhybridsystem,theenergystoragesystemcouldsupplytherapidpowerandenergysupportforthemicrogridspontaneously.Themathematicalmodelandthecontrolalgorithmofthatmicrogridtopologywerestudied.Bythesimulationanalysis,itcanbeconcludedthatAC-DCmixedmodularmicrogridtopologycouldoperatesteadilyonboththegrid-connectedmodeandtheisolatedmode.Furthermore,wecanconcludebythesimulationthatthedesignedmodularmicrogridcouldoperateuninterruptedwhenthemicrogridtopologyswitchedfromthegrid-connectedmodetotheisolatedmode.Theseamlessswitchingbecamethenaturalpropertyforthemodularmicrogrid.Asaresult,themodularmicrogridtopologycanbeconsideredasausualpower/loadmoduletorealizethefriendlypowerinteractionwiththepowergrid.

简介：AC橄榄油是100％产自希腊AC岛的原生橄榄油。AC原生橄榄油的口味浓重，辣味、果味、苦味明显，色泽透亮，根据国际橄榄油理事会（100C）的标准，只有生化指标和感官指标都符合要求的才能称之为原生橄榄油。。

简介：OnNovember13,thesubject'ResearchandDevelopmentofHardwareCompletedfor1000-kVACUltra-HighVoltageTransmissionProject:PartLineHardware'arrangedbyJiangsuElectricPowerCompanypassedtheacceptanceofanexpertgrouporganizedbytheStateGridCorporation.

简介：摘要：AC/DC功率变换器是关键设备，将交流电转换为直流电，应用广泛。然而，目前存在输入电流谐波、效率和稳定性等问题。本研究旨在通过分析研究AC/DC功率变换器，深入了解其原理和特点，并探索优化设计方法，提高效率和稳定性。通过实验和模拟评估其性能，并讨论其在电力系统中的应用前景。这项研究将为AC/DC功率变换器的研究和应用提供参考，推动其在各领域的广泛应用，并为未来研究提供指导。

简介：根据802.11ac的技术规范,对802.11ac标准与前一代WLAN标准802.11n的主要技术指标进行了对比分析,介绍了802.11ac的主要技术提升和技术特点,研究了相关的测试项目与测试方法,对全面开展802.11ac产品测试有参考价值。

简介：PropertiesfortensorproductsofsemigroupsareconsideredandthesolutionsoftheequationAC-CB=Qarediscussed.Resultsobtainedinthispaperconsiderablygeneralizethoseobtainedin[9].

简介：Acomparativestudyoftheneedle-to-liquidplasmainthecontinuousmodewithDCandACexcitationsisdetailedinthispaper.Allplasmasstudiedhereareshowntobeglowdischarges.Thisstudyisbasedonmeasurementsofseveralkeyparameters,includingelectricalenergy,opticalemissionintensitiesofactivespecies,rotationalandvibrationaltemperatures,andtemperaturesoftheneedleandliquidelectrodes.ACplasmascanproduce1.2～5timeshigherexcitedstateactivespeciesthanDCplasmasunderthesamedissipatedpower.ACexcitedliquidplasmashavethehighestenergyutilizationefficiencyamongthethreesystems(ACexcitedplasmas,DCexcitedplasmaswithwateranodeandDCexcitedplasmaswithwatercathode);mostoftheenergyisusedtoproduceusefulspeciesratherthantoheattheelectrodesandplasmas.

简介：介绍了一种计算机科学与技术专业《计算机导论》课程新的教学方法，该方法的核心思想是使具有不同个体特性的学生时刻在成就感中享受计算机的魅力，从而达到该课程的教学目的．该方法也可应用到其它课程教学过程中。

简介：不间断电源（UPS）是能够提供持续、稳定、不间断的电源供应的重要外部设备，为验证其在市电中断时行为正确性，本文设计实现了AC相位关断器。通过控制市电在任一相位断电，可以方便的检验UPS的续电能力。

简介：无论在年轻球员的引进,还是在自由球员的引进,以及对待退役球员等方面,AC米兰俱乐部的做法都是当今国际足坛最先进的,也是最合理的,更是最实惠的。对于球员的买卖,最能折射出AC米兰的智慧,他们的经营头脑和经营理念已经形成了一种套路,促使他们走入了一种良性的循环。

简介：艾默生网络能源在2005年面向全球推出了一款2900W的全数字化AC／DC模块。其工作电压范围为80-300V，额定效率达到92％以上，模块采用先进的电磁兼容设计，同时满足CE、NEBS、YD/T983等国内外标准要求。

简介：相比AC米兰的循序渐进，国际米兰更加强调激情和热情。国际米兰的盈利模式主要是通过自身的魅力和全情投入管理成本来直接获得，而AC米兰的盈利模式则主要是通过骄人的战绩和忠诚的品牌度间接获得的。但是，“博弈”的输赢最终要取决于双方每一个细节处的较量。

简介：AdesignofthemainAC/DCconvertersystemforITERisdescribedandthecon-figurationofthemainAC/DCconvertersispresented.Toreducethereactivepowerabsorbedfromtheconverterunits,themainAC/DCconvertersaredesignedtobeseries-connectedandworkinasequentialmode.Thestructureoftheregulatoroftheconvertersystemisdescribed.AsimulationmodelwasbuiltupforthePSCAD/EMTDCcode,andthedesignwasvalidatedaccordingly.Harmonicanalysisandreactivepowercalculationoftheconvertersunitsarepresented.Theresultsrevealtheadvantageofsequentialcontrolinreducingreactivepowerandharmonics.

简介：

简介：根据HVS的特性和DCT系数的特点，提出了一种基于双AC系数的自适应水印嵌入方案。仿真实验表明：该算法具有良好的不可见性，并且在抵抗剪切操作以及噪声、滤波和JPEG压缩等常见的信号处理方面表现出较强的鲁棒性。

简介：ThispaperisdevotedtopredictAClossofcableinconduitconductor(CICC)whichisofimportanceinthedesignofconductors.Theconsiderationfortheconductor'sdesignandmainparametersforthemagnetsareintroduced.InordertoattainagoodaccuracyinthecalculationofAClosses,thefielddistributionwithinsuperconductingoutsertshouldbeconsidered.CalculationoftheAClosses,includinghysteresislossesandcouplinglosses,isconducted.Anemphasisisputonthehysteresislossduringtherampupofthecurrenttotheoperationalcurrent(15.3kA)andthecouplinglossoftheconductorinapower-downconditionforinsert.Theresultsareobtainedtobe74.9kJand950Jfor40Thybridmagnets,respectively.Basedonthecalculation,abriefanalysisoflosseseffectontheconductordesignandtheoperationofmagnetisgivenforthepurposethatthecapacityofthecryogenertorcanbeevaluatedandthestabilityregimecanbeimprovedinourfutureworkonthehybridmagnets.

简介：ThesemiconductingpropertiesofanodicfilmformedonPbin4.5mol.dm-3H2SO4solu-tion（30℃）at0.9V（vs.Hg/Hg2SO4）for2hwerestudiedusingACimpedancemethod.ThephasecompositionofthefilmisPbSO4andPbO.PbSO4.Thesemiconductingpropertiesareduetothelatter.TheMott-Schottkyplotsshowthatthesaidfilmisann-typesemiconductorwithflat-bandpotentialof-0.9V（vs.Hg/Hg2SO4）anddonordensityof1×1016cm-3.Thesurfacedensitymeasuredat410—2500Hzis（2—5）×1012cm-2eV-1.

简介：交流阻抗是一个新方法由电气化学的参数的变化在水和和水泥浆糊的变硬的过程期间学习毛孔结构和水和度的变化。采用的交流阻抗方法，我们与苍蝇灰和炉渣学习了水和和水泥浆糊的变硬的过程，并且在阻抗参数上分析了不同水和年龄，水文件夹比率和矿物质混合的影响。而且，我们由测试方法和X光检查衍射的常规孔把结果与那些作比较方法。结果证明那交流阻抗能在水泥和具体研究作为一种新技术被拿。

简介：Thispaperpresentsanoveltransformermagneticbiasingcontrolmethodforhigh-powerhigh-performanceACpowersupplies.Seriousconsequencesduetomagneticbiasingandseveralmethodstoovercomemagneticbiasingarefirstdiscussed.Thecausesofthetransformermagneticbiasingarethenanalyzedindetail.Theproposedmethodisbasedonahigh-passfilterinsertedintheforwardpathandthefeedforwardcontrol.Withouttestingmagneticbiasingoftransformer,thismethodcaneliminatemagneticbiasingoftransformercompletelyinreal-timewaveformfeedbackcontrolsystemsthoughtheaeroerroroftheHalleffectsensorsvarieswithtimeandtemperature.Themethodhasalreadybeenemployedina90KVAACpowersupply.Itisshownthatitoffersimprovedperformanceoverexistingones.Inthismethod,nosensorsareusedsuchthatthezeroerroroftheHalleffectsensorshasnotanyinfluenceonthesystem.Itissimpletodesignandimplement.Furthermore,themethodissuitableforvariouspowerapplications.