简介：Thecharacteristicsoflow-frequencyelectricalnoise,voltage-current(V-I)andelectricalderivationfor980nmInGaAsP/InGaAs/GaAshighpowerdoublequantumwelllasers(DQWLs)aremeasuredunderdifferentconditions.Thecorrelationofthelow-frequencyelectricalnoisewithsurfacenon-radiativecurrentofdevicesisdiscussed.Theresultsindicatethelow-frequencyelectricalnoiseof980nmDQWLswithhighpowerismainly1/fnoiseandhasgoodrelationwiththedevicesurfacecurrentatlowinjection.

简介：适应调整并且(AMC)编码提供灵活性匹配调整和编码计划(MCS)加用户的噪音比率(SINR)发信号到干扰。为了减少传播，驱动并且维持传播质量，力量控制通常与AMC被相结合。当力量控制的目标SINR被修理时，为AMC(NPGA)算法的因此非合作的力量控制游戏被建议根据MCS适应动态目标SINR变化。在NPGA，我们经由用途提出系统传播效率，在实用程序函数基于调整被构造并且与非合作的游戏理论编码效率的地方。NPGA能满足supermodular比赛的条件，这理论上被表明，并且它的答案是最佳的。模拟结果证明NPGA能与低传播力量，和NPGA的集中性能改进系统传播效率和信号质量与几何编程算法相比是更快有效性的。

简介：Traditionaldigitalprocessingapproachesarebasedonsemiconductortransistors,whichsufferfromhighpowerconsumption,aggravatingwithtechnologynodescaling.Tosolvedefinitivelythisproblem,anumberofemergingnon-volatilenanodevicesareunderintenseinvestigations.Meanwhile,novelcomputingcircuitsareinventedtodigthefullpotentialofthenanodevices.Thecombinationofnon-volatilenanodeviceswithsuitablecomputingparadigmshavemanymeritscomparedwiththecomplementarymetal-oxide-semiconductortransistor(CMOS)technologybasedstructures,suchaszerostandbypower,ultra-highdensity,non-volatility,andacceptableaccessspeed.Inthispaper,weoverviewandcomparethecomputingparadigmsbasedontheemergingnanodevicestowardsultra-lowdissipation.

简介：Thispaperfocusesontheflowcharacteristicandlocalresistanceofnon-Newtonianpowerlawfluidinacurved90°bendpipewithcircularcross-sections,whicharewidelyusedinindustrialapplications.Byemployingnumericalsimulationandtheoreticalanalysisthepropertiesoftheflowandlocalresistanceofpowerlawfluidunderdifferentworkingconditionsareobtained.ToexplorethechangeruletheexperimentiscarriedoutbychangingtheReynoldsnumber,thewallroughnessanddifferentdiameterratioofelbowpipe.ThevariationofthelocalresistancecoefficientwiththeReynoldsnumber,thediameterratioandthewallroughnessispresentedcomprehensivelyinthepaper.TheresultsshowthatthelocalresistanceforcecoefficienthardlychangeswithReynoldsnumberofthepowerlawfluid;thewallroughnesshasasignificantimpactonthelocalresistancecoefficient.Asthepipewallroughnessincreasing,thecoefficientoflocalresistanceforcewillincrease.Themainreasonoftheinfluenceoftheroughnessonthelocalresistancecoefficientistheincreaseoftheeddycurrentregioninthepowerlawfluidflow,whichincreasesthekineticenergydissipationofthemainflow.Thispaperprovidestheoreticalandnumericalmethodstounderstandthelocalresistancepropertyofnon-Newtonianpowerlawfluidinelbowpipes.

简介：Inthepresentworktheeffectofthepowerlawexponentofpower-lawfluidandnon-Darcynumberofnon-Darcyflowonstabilityofnaturalconvectioninporousmediaarestudied.Thecomputationanalysisofeffectofpowerlawexponentofpower-lawfluidandnon-Darcynumberofnon-DarcyflowintherectangularductonthetransitionRayleighnumberRa^*,whichmeanstheconvectivemodeltransitingfromstationarystatetoperiodicsolution.Theducthasfilledaporousmediumsaturatedwiththepower-lawnon-NewtonianfluidorNewtonianfluidfornon-Darcyflow,inwhichthereisuniforminternalheatgenerationperunitvolumeq.InthispapertherelationshipbetweenthetransitionRayleighnumberRa^*andthepower-lawexponentn,Ra^*andnon-DarcynumberBe,areshown.tothesetwoaspects,thetransitionroutefromsteadytochaoticcovectionisalsoobtained.

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简介：在与喉咙直径的一张超声的嘴相结合的一个低动力的弧气体加热器的流动不到1mm相当复杂、困难在量的详细描述。单原子的气体氩和氦的加热弧的超声的喷气推进器的实验被执行了，他们的表演测量了。流动特征在数字模拟的帮助下被分析。结果证明粘滞效果是引起理想、真实的性能之间的大差别的最重要的因素。出口流动的大外部节是慢吞吞的。这在氦是特别显著的，在嘴的70%出口区域可能在亚声的流动的地方。磨擦力量能比网推进的大得多，在氦更高若干次到达，导致很低的效率。引起理想、真实的流动之间的差别的另外的因素包括：在喉咙区域，延长到嘴扩大节的电的弧，到入口气体并且从热血浆的热转移，和在真空房间的环境压力的复杂流动。当处理如此的复杂状况时，超声的嘴流动的平常的概念必须极大地被修改，这被认出当处理如此的复杂状况时。在这份报纸介绍的一般概念能在指导这台设备的设计和操作是有用的。

简介：ThePowerSystemDepartment(PSD)isthelargestpro-fessionalresearchanddevelopmentorganizationoncomprehensivepowersystemplanning,engineeringandoperationoftheElectricPowerResearchInstitute(EPRI)oftheMinistryofEnergy.TheactiveRD&EofPSDarecomposedofthefollowingfivemajorareas.Powersystemanalysis,softwaredevelopment&application,automaticdevices,DCtransmission,generation&transmissioncommission,modernlaboratoriesforRD&Eandelectricalappara-

简介：微笑，也许是人类最简单却最有力量的一种表情。微笑是盛开在脸上的花朵，是一个人能够献给其他人的一份礼物。当你的嘴角浮现一个优美的弧度时，你是否会感觉到世界增添了一丝光明？你的心中是否会荡漾起层层温馨的涟漪？一个淡淡的微笑，会给人一种微风掠过的清爽；一个会心的微笑，会让人心中开出一朵美丽而温暖的花朵。一个人经常友好地对别人微笑，

简介：看看这些种子都长成了什么样鲜花。

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简介：Knowledgeispower。（知识就是力量。）这句话是英国的哲学家、思想家、作家弗朗西斯·培根（FrancisBacon）说的。意为知识能充实提高、完善自己.有关知识的谚语很多。如：

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简介：这篇论文尽最大努力涉及停电的机制从自我组织的criticality的观点的系统。由使用放大窗口变化(SWV)和重新可伸缩的范围统计(R/S)的二个评价算法，这篇论文尽最大努力学习停电数据系统在1988-1997期间。停电数据of1994-1997与自相关与一致很好的分析表演的结果。而且，停电概率对停电尺寸的功能展出幂定律分发，这被发现。

简介：Withthedevelopmentofcleanenergy,switchinganddistributionissuesinaphotovoltaicsystemaregettingmuchattentioninrecentyears.ThispaperdesignsaDCtoACinverterandpowerswitchinganddistributionsystembetweenasolarpowersystemandthemunicipalsystembyusingtheDarlingtonamplifierstructurewiththephotosensitiveresistorandaccompanyingrelays,anddetailsthesystemcircuits.Theproposedsystemcanachieveastableoutputof110VAC,aswellasself-generatingdrivingvoltageandswitchingbetweenthemunicipalelectricalsystemandthesolarpowersystem.Themathematicanalysisandactuallytestresultsdemonstratethattheproposedmethodisaneasy,inexpensive,andlowcostwaytobuildasolarpowerswitchinganddistributionsystem.

简介：Basedonananalysisofthemisunderstandingsandproblemsconcerningwindpowerdevelopment,thispapersummarizestheexperiencesofthecoordinateddevelopmentofwindpowerandpowergridsinforeigncountries,andproposesprinciplesandstrategiesforthecoordinateddevelopmentofwindpowerandpowergrids,andrelatedmeasuresandsuggestionsforlargescaledevelopmentofwindpowerinChina.