简介：为结构化的P2P蠕动的un-的贪婪繁殖政策采用每个节点的附近的节点表在对等(P2P)联网加快P2P蠕虫的繁殖。在描述P2P蠕虫的技术背景以后，贪婪繁殖的算法被探讨。为这条新奇繁殖政策模仿设计也被描述。然后，在传播上的贪婪繁殖政策的效果加速，在静态的P2P蠕虫的会聚的集中速度，和攻击交通被模仿并且讨论。主要试验性的结果证明贪婪繁殖是有害的并且能把严重损坏带到P2P网络。

简介：Inthispaper,anewresult,newformulasoftransferfunctionandinputimpedancefor2-Ddissipativereactancenetworkcascadesynthesisisgivenintermsofsimplifiedformulastorealizedoublyterminatedresistively1-Ddissipativereactancenetworks.Thenewresultincludesthemoregeneralcases,e.g.thebothcanbedissipativeoroneisdissipativeandtheanotherisalosslessreactancesubnetworkandsoon.Twocalculationexamplesaregiveninthepapertoillustratetheaboverealizations.Besides,consideringsomeproblemsofthedirectconnectionbetweentwosubnetworks,wealsointroduceone-waylinestodiscussthecascadesynthesisofnonreciprocal2-Ddissipativereactancenetworks.

简介：Thispaperproposesanewtechniquethatisusedtoembeddepthmapsintocorresponding2-dimensional(2D)images.Sincea2Dimageanditsdepthmapareintegratedintoonetypeofimageformat,theycanbetreatedasiftheywereone2Dimage.Thereby,itcanreducetheamountofdatain3Dimagesbyhalfandsimplifytheprocessesforsendingthemthroughnetworksbecausethesynchronizationbetweenimagesfortheleftandrighteyesbecomesunnecessary.Weembeddepthmapsinthequantizeddiscretecosinetransform(DCT)dataof2Dimages.Thekeytothistechniqueiswhetherthedepthmapscouldbeembeddedinto2Dimageswithoutperceivablydeterioratingtheirquality.Wetrytoreducetheirdeteriorationbycompressingthedepthmapdatabyusingthedifferencesfromthenextpixeltotheleft.Weassumethatthereisonlyonenon-zeropixelatmostononehorizontallineintheDCTblockbecausethedepthmapvalueschangeabruptly.Weconductanexperimenttoevaluatethequalityofthe2Dimagesembeddedwithdepthmapsandfindthatsatisfactoryqualitycouldbeachieved.

简介：6月5日,苹果公司在美国圣何塞举行苹果全球开发者大会（WWDC）2018,发布多项产品和技术.其中,推出机器学习CoreML2,速度提升30%,最高将模型大小缩减75%.苹果在去年WWDC上发布了CoreML,便于开发者为iOS创建机器学习应用.

简介：拓普达“电子产品的失效分析技术与经典案例”课程作用：电子产品在不断与失效作斗争中不断提高可靠性，失效分析是与产品失效作斗争的最有效的工具，通过对失效产品的失效分析，诊断失效产品的失效机理，以失效机理为引导，进一步分析诱发失效机理的应力.

简介：srzn2（PO4）2：在大气中的高温固相反应合成Sm3＋荧光粉。srzn2（PO4）2：Sm3＋荧光粉是通过紫外光有效激发（UV）和蓝色光，和发射峰被分配到2-6h54G5//2过渡（563nm），2-6h74G5//2（597nm和605nm）和2-6h94G5//2（644nm和653nm）。对srzn2发射强度（PO4）2：Sm3＋的Sm3＋浓度的影响，其浓度猝灭效应srzn2（PO4）2：钐也观察到。当掺杂离子（=Li，Na和K）离子的发光强度，srzn2（PO4）2：Sm3＋可以明显增强。在国际照明委员会（CIE）的srzn2色坐标（PO4）2：Sm3＋定位在橙红色的区域。结果表明，该荧光粉具有潜在的应用在白光发光二极管（LED）。

简介：1．引言P2P对等网络是非中心化网络，信息的交换不需要通过创建的中心站点，而直接在对等设备（如个人计算机）间动态地进行信息交换和服务，是一种高效直接的传输方式。P2P打破了传统的C／S模式，各节点对等并可互相提供服务。P2P对等应用在互联网中已经非常普及，并且成为网络资源的巨大消耗者。随着移动数据业务与可承载数据业务终端的普及，以及移动通信网络的快速发展，移动终端与网络结合得越来越紧密，在移动环境中如何实现P2P应用已经引起广泛关注。

简介：Anovelpre-ionizationschemeofhelicaltransverse-pulsedpre-ionizationinalongitudinaldischargeCO2laserispresented.Thelasertubeismadeofglasswithinnerdiameterof7.5mmanddischargelengthof50cm.Thelaserperformancecharacteristicsasfunctionsofparameters,suchaspressure,chargingcapacitanceandappliedvoltage,areinvestigated.Comparedwiththesamelaserstructurewithoutpre-ionization,themaximumpulseenergyimprovesby23%,theoptimumelectro-opticalefficiencyincreasesby31%,andthespecificoutputenergyreaches26J/(L·atm).

简介：与Wavel，WiMAXFomm？标准比较，Wave2RadioConformanceTest标准在移动wiMAX？的系统特性上有些新的规格，因此需要一些新的测试能力。而测试Wave2Profiles功能，对于成功建置移动WiMAX的服务至关重要，随着移动WiMAX技术在全球的快速普及，量测仪器具备该测试功能已刻不容缓。

简介：Inthispaper,quartzcrystalmicrobalance(QCM)gassensorscoatedwithpolyehtyleneimine(PEI)wasutilizedforcarbondioxide(CO2)detection.Thesensingmechanismisbasedontheavailabilityofreversibleacid-basereactionsbetweenCO2moleculesandPEIatroomtemperature.TheexperimentalresultsrevealedthatthePEI/starchsensorexhibitedmuchhighersensitivitythanthatofpurePEI,andshowedapproximatelinearityoveraconcentrationregionrangingfrom500ppmto8000ppm.Theinfluenceofhumidityhadalsobeeninvestigated.Furthermore,theresponseandrecoverytimedeceasedastheoperationtemperaturesincreased.Finally,sensitivitylossafterconservationforseveraldaysandreversibilityofthesensorshadbeendiscussed.

简介：Internet应用的迅速推广，使他陷人了自身难以克服的困境。这是因为Internet是一个“网间网”，他是由许许多多IP自治域系统通过互联构成的复合网络系统。传输带宽的增加、交换速度的提高以及流量工程的引入，并没有从根本上改变传递信息过程中的多跳、存储转发和点到点传输的工作模式，因而阻塞现象的发生在所难免。

简介：基于夫妇波浪方程和有限差别的时间域(FDTD)算法，2-Dphotonic水晶couplers的强壮的夫妇特征被计算。理论分析和数字模仿的结果显示在2-Dphotonic水晶coupler的精力不能完全在二波导之间被转移。与弱联合理论的结果相比，我们的结果是更精确的。CLC数字TN252文件代码A由福建省(2001J008)的青春科技革新条款基础支持了

简介：Thestudyofcycliccodesoverringshasgeneratedalotofpublicinterest.Inthispaper,westudycycliccodesandtheirdualcodesovertheringZP2oflengthpe,andfindasetofgeneratorsforthesecodes.Theranksandminimalgeneratorsetsofthesecodesarestudiedaswell,whichplayanimportantroleindecodinganddeterminingthedistancedistributionofcodes.

简介：:Twonovelpoly[(3-alkyhhiophene-2,5-diyl)-(benzylidenequinomethane-2,5-diyl)s]derivatives,poly[(3-butylthiophene-2,5-diyl)-(p-N,N-dimethylamino)benzylidenequinomethane-2,5-diyl)](PBTDMABQ)andpoly[-(3-octylthiophene2,5-diyl)-(p-N,N-dimethylamino)benzylidenequinomethane-2,5-diyl)](POTDMABQ),weresynthesized.Thebandgapsofthetwopolymersarecalculatedas1.75eVforPBTDMABQand1.69eVforPOTDMABQ,respectively.Thehomogenousfilmsofthetwopolymerswerepreparedandtheirthird-ordernonlinearopticalpropertieswerestudiedbythebackwarddegeneratefour-wavemixingat532nm.Byusingtherelativemeasurementtechnique,thethird-ordernonlinearopticalsusceptibilitiesofPBTDMABQandPOTDMABQarecalculatedas5.62×10^-9and1.22×10^-8ESU,respectively.Itisfoundthatsubstitutedalkygroupshavestrongeffectsonthebandgapandnonlinearopticalpropertiesofthetwopolymers.Therelativelybigthird-ordernonlinearopticalsusceptibilitiesandsmallbandgapofPOTDMABQresultedmainlyfromthelongeralkylwithstrongelectron-donatingabilitycanenhancethedelocationdegreeofconjugatedπelectronics.

简介：本文主要针对新疆油田公司采油厂使用的《A2数据采集系统》的开发情况及在生产中的重要指导作用，阐述了通过数据源点采集，建立集信息采集、传输、存储、处理、分析、发布、管理和应用于一体，规范、统一、安全、高效的现代化生产管理信息应用体系。

简介：ZnS:有到3.2nm的从1.9nm的粒子尺寸的Mn2+nanocrystals(NC)经由化学降水方法被综合与不同[S2]/[Zn2+]比率。为Mn排放的尺寸依赖者腐烂展出双指数的行为。并且在毫秒时间领域，二一生值能两个都与尺寸被弄短增加，它被归因于提高了在主机和Mn2+杂质之间的相互作用。一个分子的结构模型被建议解释二个一生部件的趋势，它被相关到S空缺的数字(对)在Mn2+附近的缺点。

简介：设备特性：术高品质自动焊接装置，可代替烙铁焊接：

简介：Areviewontheprogressofpowerful2μmsilicafibersourcesinpastdecadesispresented.Wereviewthestate-of-the-artrecordsandrepresentativeachievementsof2μmhigh-average-powercontinuouswave,pulsedfiberlasersandamplifiers,andpowerfulsuperfluorescentsources.Challengeswhichlimitthefurtherpowerscalingof2μmsilicafibersourcesarediscussed,includingpumpingbrightnesslimitation,thermalproblem,andnonlineareffects.Potentialandpromisingroadmapstogobeyondtheselimitations,liketandempumpingandbeamcombining,arediscussed.Prospectsofpowerful2μmsilicafibersourcesarealsopresentedintheendofpaper.

简介：Globalpositioningsystem(GPS)forvehicleapplicationsintheurbanareaischallengedbylowsignalintensity.ThecarrierloopbasedonfastFouriertransform(FFT)canobtainahighsignaltonoiseratio(SNR)gainbyincreasingtheobservationtime.However,thisleadstoamajorproblemthattheaccelerationcannotbeignored.TheperformanceoftheFFT-basedloopwilldeclinewiththeaccelerationincreasing.ThispaperdiscussestheeffectofthedynamiconFFTfirst.ThenahighperformancecarriertrackingloopforweakGPSL5signalsisproposed.Itcombinesdiscretechirp-Fouriertransform(DCFT)andthephasefittingmethodtoestimateDopplerfrequencyandDopplerratesimultaneously.First,asequenceofintegrationresultsisusedtoperformDCFTtoestimatecoarseDopplerfrequencyandDopplerrate.Second,thephaseofthesequenceiscalculatedandusedtoperformlinearfitting.Bythephasefittingmethod,thefineDopplerfrequencyandDopplerratecanbeestimated.ThecomputationcostissmallbecausetheintegrationresultsareusedandthephasefittingmethodneedsonlycoarseestimatesofDopplerfrequencyandDopplerrate.ComparedwithFFTandDCFT,theprecisionofthephasefittingmethodisnotlimitedbytheresolution.Thustheproposedloopcangethighprecisionandlowcarriertonoiseratio(C/N0)trackingthreshold.Simulationresultsshowthisloophasagreatimprovementthanconventionalloopsforurbanweak-signalapplications.

简介：TheopticalabsorbanceinnearUVwavelengthregioninSnO2nanoclustersinanexternalelectricfieldisdeterminedatroomtemperature.Theabsorbancespectraasapplicedfieldandtheabsorbancevariationswiththeappliedfieldareobtained.Therelationbetweenabsorbancechangeandappliedfieldisnon-linear.andissaturatedathighfieldregion.