简介：奥林巴斯2013年发布了旗下旗舰机相机新品E—M1，这也是隶属于OM-D系列的第2款产品，虽然看似主要指标没有改变，但是E—M1相对E—M5有了相当程度的完善，下面就请跟着DGBest一起来看看奥林巴斯E-M1到底有什么本事。

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简介：Tips：Too和two的发音一样，意思可不同！当老外说“Imsorry,too”时，小明以为是“I’msorry,two”，于是回答：“I’msorry,three.”

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简介：智能手机是个好东西，用得好那就是一个小型的移动终端，给咱们提供了不少方便。但是智能手机也不方便，除开一些病毒之类的闹心事儿，常常电量不足也很麻烦。有个同事就抱怨说，早上才给苹果充满电，还不到中午就只剩下75％了，要是有事儿出门，那充电器啊移动电源啊更是必不可少——那些东西都不轻呢!

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简介：ForthereliabilityandpowerconsumptionissuesofEthernetdatatransmissionbasedonthefieldprogrammablegatearray(FPGA),alow-powerconsumptiondesignmethodisproposed,whichissuitableforFPGAimplementation.Toreducethedynamicpowerconsumptionofintegratedcircuit(IC)design,theproposedmethodadoptsthedynamiccontroloftheclockfrequency.Formostofthetime,whentheportisintheidlestateorlower-ratestate,userscanreduceoreventurnoffthereadingclockfrequencyandreducetheclockflipfrequencyinordertoreducethedynamicpowerconsumption.Whenthereceivingrateishigh,thereadingclockfrequencywillbeimprovedtimelytoensurethatnodatawilllost.SimulatedandverifiedbyModelsim,theproposedmethodcandynamicallycontroltheclockfrequency,includingthedynamicswitchingofhigh-speedandlow-speedclockfliprates,orstopoftheclockflip.

简介：ThispaperputsforwardanewfaultdiagnosismodelbasedonPetrinet.Inthisnewfaultdiagnosismethod,anassociatedtreeisfirstdefinedtodescribethelogicaccordingtotheprotectionsandcircuitbreakers.AfterthataPetrinetdiagnosismodelcomesintobeingandtheprecisediagnosisofpowergridelementscanberealizedatthesametime.Thesimulationresultsgiveninthispaperillustratethatthisfaultdiagnosismethodcanmakearapiddiagnosisincomplexfaultsituationandgiveaccurateresultstopowergridfaultdiagnosis.

简介：Largesizedpowertransformersareimportantpartsofthepowersupplychain.Theseverycriticalnetworksofengineeringassetsareanessentialbaseofanation'senergyresourceinfrastructure.Thisresearchidentifiesthekeyfactorsinfluencingtransformernormaloperatingconditionsandpredictstheassetmanagementlifespan.Engineeringassetresearchhasdevelopedfewlifespanforecastingmethodscombiningreal-timemonitoringsolutionsfortransformermaintenanceandreplacement.Utilizingtherichdatasourcefromaremoteterminalunit(RTU)systemforsensor-datadrivenanalysis,thisresearchdevelopsaninnovativereal-timelifespanforecastingapproachapplyinglogisticregressionbasedontheWeibulldistribution.Themethodologyandtheimplementationprototypeareverifiedusingadataseriesfrom161kVtransformerstoevaluatetheefficiencyandaccuracyforenergysectorapplications.Theassetstakeholdersandsupplierssignificantlybenefitfromthereal-timepowertransformerlifespanevaluationformaintenanceandreplacementdecisionsupport.

简介：Thepropertiesofaseriesofphasemeasurementtechniques,includinginterferometry,theHartmann–Shackwavefrontsensor,theknife-edgetechnique,andcoherentdiffractionimaging,aresummarizedandtheirperformanceinhighpowerlaserapplicationsiscompared.Theadvantages,disadvantages,andapplicationrangesofeachtechniquearediscussed.

简介：Inthispaperweconsiderlaserintensitiesgreaterthan1016Wcm-2wheretheablationpressureisnegligibleincomparisonwiththeradiationpressure.Theradiationpressureiscausedbytheponderomotiveforceactingmainlyontheelectronsthatareseparatedfromtheionstocreateadoublelayer(DL).ThisDLisacceleratedintothetarget,likeapistonthatpushesthematterinsuchawaythatashockwaveiscreated.Herewediscusstwonovelideas.Firstly,thetransitiondomainbetweentherelativisticandnon-relativisticlaser-inducedshockwaves.Oursolutionisbasedonrelativistichydrodynamicsalsofortheabovetransitiondomain.Therelativisticshockwaveparameters,suchascompression,pressure,shockwaveandparticleflowvelocities,soundvelocityandrarefactionwavevelocityinthecompressedtarget,andtemperaturearecalculated.Secondly,wewouldliketousethistransitiondomainforshockwave-inducedultrafastignitionofapre-compressedtarget.Thelaserparametersforthesepurposesarecalculatedandthemainadvantagesofthisschemearedescribed.Ifthisschemeissuccessfulanewsourceofenergyinlargequantitiesmaybecomefeasible.

简介：Thispaperreviewsthedifferentchallengesthatareencounteredinthedeliveryofhighpowerlasersasdriversforfusionenergy.Wewillfocusondiode-pumpedsolid-statelasersandwewillhighlightsomeofthemainrecentachievementswhenusingytterbium,cryogeniccoolingandceramicgainmedia.Apartfromsomeexistingfusionfacilitiesandsomemilitaryapplicationsofdiode-pumpedsolid-statelasers,wewillshowthatdiode-pumpedsolid-statelasersarescalabletoinertialfusionenergy(IFE)’sfacilitylevelandthattheall-fiberlaserschemeisverypromising.

简介：Thequestforenergyefficiencyhasgrowingimportanceinhighperformancemany-coresystems.However,incurrentpractices,thepowerslacks,whicharethedifferencesobservedbetweentheinputpowerbudgetandtheactualpowerconsumedinthemany-coresystems,aretypicallyignored,thusleadingtopoorenergyefficiency.Inthispaper,weproposeaschemetoeffectivelypowertheon-chipcommunicationsbyexploitingtheavailablepowerslackthatistotallywastedincurrentmany-coresystems.Asso,thedemandforextraenergyfromexternalpowersources(e.g.,batteries)isminimized,whichhelpsimprovetheoverallenergyefficiency.Inessence,thepowerslackisstoredateachnodeandtheproposedroutingalgorithmusesadynamicprogrammingnetworktofindthegloballyoptimalpath,alongwhichthetotalenergystoredonthenodesisthemaximum.Experimentalresultshaveconfirmedthattheproposedscheme,withlowhardwareoverhead,canreducelatencyandextraenergyconsumptionby44%and48%,respectively,comparedwiththetwocompetingroutingmethods.IndexTerms?Adaptiverouting,dynamic

简介：Accuratepredictionofwindpowerissignificantforpowersystemdispatchingaswellassafeandstableoperation.BymeansofBPneuralnetwork,radialbasisfunctionneuralnetworkandsupportvectormachine,anewcombinedmethodofwindpowerpredictionbasedoncooperativegametheoryisproposed.Inthemethod,everysingleforecastingmodelisregardedasamemberofthecooperativegames,andthesumofsquareerrorofcombinationforecastingistakenastheresultofcooperation.TheresultisdividedamongthemembersaccordingtoShapleyvalues,andthenweightsofcombinationforecastingcanbeobtained.Applicationresultsinanactualwindfarmshowthattheproposedmethodcaneffectivelyimprovepredictionprecision.

简介：Amethodofdetectingdry,icyandwetroadsurfaceconditionsbasedonscanningdetectionofsinglewavelengthbackwardpowerisproposedinthisletter.Thedetectorisusedtoreceivethebackwardscatteredpowerwhichchangeswiththeincidenceangle.Therelationshipbetweenbackwardpowerandincidenceangleisusedtofindouttheeffectiveanglerangeanddistinguishmethod.Experimentandsimulationshowthatitisfeasibletoclassifythesethreeconditionswithinincidenceangleof5.3degree.

简介：Amongthecomponentsonamany-corechip,network-on-chip(NoC)hasalreadycontributedalargeportiontooverallpowerconsumption.OptimizingNoCperformanceunderagivenpowerbudgetisfurthercomplicatedtokeepthenetworkconnectivityandminimizethedetourdistances.Inthispaper,aNoCpowerbudgetingmethodfromthecommunicationperspectiveisproposed,whichintelligentlypowersoffrouters/linksandsetsupalternativepathstorestrictthepowerandthermalenvelop.Theeffectofperformanceoptimizaionoftheproposedpowerbudgetingmothodismeasuredbasedonlatencyandinthegivenpowerbudget,22%latencycanbereducedaveragelycomparedwithsomecompetingmethodswhenrunningrealbenchmarks.

简介：弗雷德里克·肖邦（FryderykFranciszekchopin1810—1849）是波兰最伟大的作曲家、钢琴家，有“钢琴诗人”的称号，在19世纪欧洲音乐史上占据着重要的地位。肖邦不仅是这一世纪上半叶进步浪漫主义音乐的典型代表而且是后来欧洲各民族乐派的先驱。肖邦的作品多以钢琴曲为主，体裁多样、感情真挚，题材和波兰人民的生活、历史紧紧相连。结构灵活自如、曲调热情奔放。其中夜曲是他创作中最富于浪漫气质的体裁，但是在他流亡巴黎后创作的夜曲在内容上就更有较浓厚的浪漫主义感伤情调，也更有个性。最具代表性的作品就是《降E大调夜曲》，曲子用的是一般的旋律，丰富多彩的和声和变幻的节奏来表达肖邦那种浪漫主义情怀。

简介：目的探讨叉头框转录因子M1（FOXM1）、Slug及上皮间质转化的相关蛋白E-钙黏蛋白（E-cadherin）、波形蛋白（vimentin）在基底细胞样乳腺癌（BLBC）、非基底细胞样乳腺癌（non-BLBC）及癌旁乳腺组织中的表达及其临床意义。方法采用免疫组织化学MaxVision法对2005年1月至2014年5月在本院治疗的95例BLBC及其癌旁乳腺组织和100例non-BLBC中FOXM1、Slug、E-cadherin及vimentin的表达进行检测。计数资料的分析运用χ2检验,相关性分析采用Spearman相关性分析。结果在95例BLBC中,FOXM1、Slug和vimentin蛋白的阳性表达率分别为76.84%（73/95）、67.36%（64/95）及52.63%（50/95）,显著高于其在non-BLBC[57.00%（57/100）、47.00%（47/100）、31.00%（31/100）]及癌旁乳腺组织[25.26%（24/95）、26.31%（25/95）、9.47%（9/95）]中的表达（χ^2=51.673、32.146、41.337,P均=0.000）。BLBC中E-cadherin的阳性表达率为27.37%（26/95）,显著低于其在non-BLBC[51.00%（51/100）]及癌旁乳腺组织[75.79%（72/95）]中的表达（χ^2=44.590,P=0.000）。FOXM1、Slug、E-cadherin及vimentin的表达均与BLBC的淋巴结转移及临床分期有关,差异具有统计学意义（χ^2=4.348、4.669、18.387、21.287,P均〈0.050;χ^2=7.752、5.366、4.230、7.167,P均〈0.050）。BLBC中,FOXM1、Slug与vimentin的表达呈正相关（r=0.279,P=0.006;r=0.284,P=0.005）,与Ecadherin表达呈负相关（r=-0.503,P=0.000;r=-0.378,P=0.000）,FOXM1与Slug的表达呈正相关（r=0.310,P=0.002）。E-cadherin与vimentin的表达呈负相关（r=-0.363,P=0.000）。结论FOXM1及Slug通过抑制E-cadherin表达、促进vimentin表达从而促进了BLBC的局部侵袭和远处转移,可以作为BLBC预后评价的指标。