简介：AnewSuboptimalMaximumLikelihoodEstimation(SMLE)algorithmbasedonfull-derampmodelanditsimplementationinsatellite-borneradaraltimeterarepresented,withemphasisontheinfluenceofboththereturnfluctuationandthereceivernoiseonheightandslopeestimationprecision.Someconclusionsareobtainedandverifiedbycomputersimulation.

简介：带忍受卫星的GPS接收装置的HY-2卫星是第一颗中国雷达高度表卫星，决心精确其光线的轨道必须到达厘米水平。现在HY-2在测试阶段以便观察公开地没被释放。以便基于忍受卫星的GPS技术为HY-2学习精确轨道决心精确和过程，忍受卫星的GPS数据在这份报纸被模仿。HY-2忍受卫星的GPS天线能各收到至少七颗GPS卫星历元，它能验证GPS接收装置和天线设计。而且，处理流动被给的精确轨道决心和决心试验的精确轨道与还原剂动态的方法和运动学的几何学方法用HY-2-borneGPS数据被进行。与1和3个公里阶段数据随机错误，光线的轨道决心精确能用这二个方法完成厘米水平，运动学的轨道精确性比还原剂动态的轨道的稍微低。地球重力领域模型是严重影响高度表卫星的精确轨道决心的一个重要因素。还原剂动态的轨道决心实验与不同地球严肃领域模型一起被做，例如EIGEN2，EGM96，TEG4，和GEMT3。用很多高精确忍受卫星的GPS数据，HY-2精确轨道决心能与通常使用的地球严肃域模型一起到达厘米水平直到上面50度和订单。

简介：AbstractInfection of humans by Powassan virus (POWV) occurs rarely but is potentially life-threatening. First isolated in Ontario, Canada in 1958, the presence of POWV has been confirmed in three countries: Canada, the USA, and Russia. Although a limited number of human cases has been reported thus far, the infection rate has shown signs of increasing during the 21st century. Interestingly, POWV and a genetically close variant, deer tick virus (DTV), are the only member of the tick-borne flaviviruses known to be endemic in North America and maintain in respective tick-host cycles. In this review, we briefly summarize current knowledge involving the epidemiology and etiology, pathogenesis and immunity, molecular evolution, and protein functions of POWV, aiming to increase our understanding of the virus and unlock the potential to control this lethal pathogen. These data may also provide tools to minimize the future threat of other emerging and re-emerging viruses.

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简介：把引力与惯性分开的问题在很一般的感觉被讨论，并且结论是积极的：人能把引力与惯性分开，如果各种各样的观察技术被申请。在卫星gravimetry的加速表鈥檚位置问题被调查，并且由于在团之间的一台仪器以及差别的位置错误，中心和重力集中的另外的加速效果被探索。

简介：RPC模型最近在摄影测量学和遥感社区提起了可观的兴趣。RPC是能够完成高近似精确性的一个概括传感器模型。不幸地，RPC模型的参数的计算服从于在所有可得到的文学的参数起始。为没有起始的价值的RPC模型的参数的计算的一个算法在SPOT-5上被介绍并且测试，CBERS-2，ERS-1imageries。RPC模型对推扫帚和SAR形象合适。

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简介：挑战性的微型卫星收费载重的精确轨道决心(捣烂)卫星基于位置和在武汉大学里被开发的航行数据分析家(熊猫)软件被做，用从白天126～131的年2002的机载的GPS数据。Theorbit精确性被从GFZprocessed以后科学轨道(PSO)分析差别估计，GPS搬运人和伪范围数据剩余和变化的卫星激光(SLR)剩余。

简介：ThispaperhasanalyzedtheperturbationsofaGeoX-Sat(virtualsatellite)ingeostationaryorbit(GEO).Andcontrolmethods,strategiesandcalculationprocessesaredesignedoftheEast-West(E/W)station-keepingoftheGeoX-Sat.TheAttitudeandOrbitControlSubsystem(AOCS)providesattitudeinformationandmaintainstherequiredspacecraftattitudeduringallphasesofthemission,startingatspacecraftseparationfromthelaunchvehicleandthroughoutitsoperationallifetime.FortheGeoX-Satexercisingdesign,duetotimelimitations;onlytwomodesofoperationwereconsideredafterassumedlaunchingoperation:normalandstationkeeping.

简介：Onthebasisofconsideringdownlinkpowerfluxdensitylimit,shadowingeffectfrequencyreuseindifferentsystemsandadjoiningbeamsofsamesystem,adoptingvoiceactivityandpolarizationisolationtechniques,thecapacityofCDMAmobilesatellitecommunicationsystematdifferentdownlinkpowerfluxdensitylimitmodes,channelspreadbandwidthandmobileuser’squalityfactorofreceivingsystem(G/T)areanalysedandcalculated,andcomparedwiththeonesofTDMAandFDMA.Theconclusionsaregivenattheendofthispaper.

简介：一个新估计方法被建议，它利用unscentedtransform方法，因此，真平均数和协变性更精确地被接近。没有为EKF必要的linearization进程，新方法能被用于非线性的系统，并且它不要求噪音的Gaussian分布并且什么“s更多的，它实现和更精确的评价特征的容易使它能在卫星轨道模拟的实验表明它的好性能。数字实验证明unscentedKalman过滤器的申请比EKF更有效。

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简介：Theresultsoftwoballoonsoundingsduringthesummerandautumnof1993fromtheXiangheObservationStationarebeingutilizedinastudyofthetemporalandspatialdistributionoftheatmosphericaerosols.Theballoon,gondola,instrumentationandatmosphericconditionsduringtheobservationperiodaredescribed.Thetemporalandspatialcharacteristicsofaerosolconcentration,sizeratio,mixingratio,andsizedistributionforbothtroposphereandstrato-spherearepresentedandanalyzed.

简介：Inthisresearch,acontent-basedimageretrieval(CBIR)systemforhighresolutionsatelliteimageshasbeendevelopedbyusingtexturefeatures.Theproposedapproachusesthelocalbinarypattern(LBP)texturefeatureandablockbasedscheme.Thequeryanddatabaseimagesaredividedintoequallysizedblocks,fromwhichLBPhistogramsareextracted.TheblockhistogramsarethencomparedbyusingtheChi-squaredistance.ExperimentalresultsshowthattheLBPrepresentationprovidesapowerfultoolforhighresolutionsatelliteimages(HRSI)retrieval.

简介：Toestablishanefficientinter-satellitelink(ISL)inanLEOnetwork,theeffectofgeometriccharacteristicsofISLontheISLsandthedevicesontheLEOsatelliteshouldbeexamined.BecauseofthecontinuousmovementoftheLEOsatellite,thetime-varyingbehavioursoftheISL'sgeometriccharactersisticscontinuouslychangewiththechangesofthesatellite'spositionontheorbit.ThesedynamicgeometriccharacteristicsoftheISLsareimportantforISL'sperformanceanalyzingandthedesignofthedevicesontheLEOsatellite.ThispaperdescribesdynamicgeometriccharacteristicsofISL,analyzestheimpactoftheseregulationsonthetrackingsystemofthesatellite'santennaandthepoweradjustingsystemofthesatellite'stransmitter,withtheIridiumsystemasanexample.

简介：SVLBI(空间很长的基线干涉量度)在测地学和地球动力学有一些重要潜在的应用，为哪个最困难的任务是精确决定一颗SVLBI卫星的轨道。这个工作学习将可能能决定一颗空间VLBI卫星的轨道的几种技术。然后，根据为测地学的学习和GNSS的几何学的卫星和要求的类型和特征(GPS，伽利略)追踪空间VLBI卫星的卫星，SVLBI卫星(TEST-SVLBI)的六个Keplerian元素被决定。一个程序被设计由网络，追踪的网络ofTEST-SVLBI与被设计的车站分析不同高度的空格的范围区域。由网络追踪TEST-SVLBI的效率被学习，并且结果被介绍。

简介：Theexploitationofdifferentnon-rigorousmathematicalmodelsasopposedtothesatelliterigorousmodelsisdiscussedforgeometriccorrectionsandtopographic/thematicmapsproductionofhigh-resolutionsatelliteimagery(HRSI).Furthermore,thispaperfocusesontheeffectsofthenumberofGCPsandtheterrainelevationdifferencewithintheareacoveredbytheimagesontheobtainedgroundpointsaccuracy.Fromtheresearch,itisobviouslyfoundthatnon-rigorousorientationandtriangulationmodelscanbeusedsuccessfullyinmostcasesfor2Drectificationand3Dgroundpointsdeterminationwithoutacameramodelorthesatelliteephemerisdata.Inaddition,theaccuracyuptothesub-pixellevelinplaneandaboutonepixelinelevationcanbeachievedwithamodestnumberofGCPs.

简介：这份报纸为用BDS(BeiDou航行卫星系统)估计湿折射度地的精确论述一条新奇途径模拟仅仅，为深圳和香港GNSS的GPS，和BDS+GPS联网。模拟被把人工的噪音加到真实观察数据集执行。，而不是使用，从观点计算的d和s参数在以前的研究弄湿延期，我们采用偏爱和RMS参数，从全部的voxels的断层摄影术结果计算了，回答决心以便获得折射度的精确的更直接、全面的评估。结果显示出那：(1)湿折射度估计了独自使用BDS的tropospheric(仅仅使用的9颗卫星)的精确基本上比得上GPS的；(2)BDS+GPS(当前的操作)不能显著地改进数据为折射度断层摄影术的应用程序的空间密度；并且(3)特别地在更低的空气，折射度断层摄影术的精确的任何细微增加在中国运作的气象学的服务上为任何应用依赖者忍受大意义。

简介：Satellitecells(SCs)hasbeenshowntobethesourceofmyogenicprecursorcellsresponsibleformusclefiberrepairandregenerationduringatrophy,afterinjuryorneuromusculardisorders.RecentstudiesdemonstratedthefeasibilityofautologousSCstransplantationforrepairofmyocardialnecrosis.

简介：Satelliteconstellationdesignforspaceopticalsystemsisessentiallyamultiple-objectiveoptimizationproblem.Inthiswork,totacklethischallenge,wefirstcategorizetheperformancemetricsofthespaceopticalsystembytakingintoaccountthesystemtasks(i.e.,targetdetectionandtracking).Wethenproposeanewnon-dominatedsortinggeneticalgorithm(NSGA)tomaximizethesystemsurveillanceperformance.Paretooptimalsetsareemployedtodealwiththeconflictsduetothepresenceofmultiplecostfunctions.Simulationresultsverifythevalidityandtheimprovedperformanceoftheproposedtechniqueoverbenchmarkmethods.