学科分类
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8 个结果
  • 简介:有时候人们会在某段时间里,仿佛有衰神附体一般,总感觉在某些方面非常的不顺,可有时候你的气场会突然发生大逆转,衰神将瞬间逃之夭夭。现在就来看看最近你在哪方面会转运?让自己掌握住成功的先机。

  • 标签: 个人 家庭生活 星座 性格
  • 简介:Satelliteconstellationdesignforspaceopticalsystemsisessentiallyamultiple-objectiveoptimizationproblem.Inthiswork,totacklethischallenge,wefirstcategorizetheperformancemetricsofthespaceopticalsystembytakingintoaccountthesystemtasks(i.e.,targetdetectionandtracking).Wethenproposeanewnon-dominatedsortinggeneticalgorithm(NSGA)tomaximizethesystemsurveillanceperformance.Paretooptimalsetsareemployedtodealwiththeconflictsduetothepresenceofmultiplecostfunctions.Simulationresultsverifythevalidityandtheimprovedperformanceoftheproposedtechniqueoverbenchmarkmethods.

  • 标签: 空间光学系统 性能指标 星座设计 卫星 非支配排序遗传算法 多目标优化问题
  • 简介:Inthedesignproblemoflowearthorbit(LEO)reconnaissancesatelliteconstellation,optimizationofcoverageperformanceisthedesigngoalinmostcurrentmethods.However,intheusingprocess,theuseronlyconcernswiththedetectioncapabilitiesratherthancoverageperformance.Toestablishtherelationshipbetweenthesetwoaspects,thereconnaissanceprocessesofnormalstochastictargetsareconsideredandthemathematicmodelsofdetectionprocessesarebuilt.Theindicatorsofcoverageperformanceareusedtoevaluatethedetectionprobabilityandexpectationofdetectiontimedelay,whichareimportantfactorsinreconnaissanceconstellationestimationviewedfrommilitaryintelligencediscipline.TheconclusionsconfirmedbythefinalsimulationwillbeusefulinLEOreconnaissanceconstellationdesign,optimizationandevaluation.

  • 标签: low earth ORBIT (LEO) RECONNAISSANCE satellite
  • 简介:希捷科技公司日前推出专为企业2级近线存储设计的全新企业级存储解决方案Constellation^TM系列硬盘。该系列包括一款2.5英寸Constellation硬盘和一款3.5英寸ConstellationES硬盘,

  • 标签: 企业级硬盘 希捷 明星 存储解决方案 存储设计 ES