简介:研究厨余垃圾的处理与清运问题,为大、小型处理设备的数量选择、选址及垃圾收运路线的设计分别建立了最优化模型。模型中将城市道路网抽象成无向赋权图,考虑了在交通拥堵和环境影响下的运输成本、设备处理量的均衡性和对环境的影响程度,构成多目标优化问题,进而运用改进的粒子群算法确定大型设备的位置,并给出了设置小型设备的基本原则;通过分析大、小型设备在不同处理能力下总成本的差异,确定了适合城市实际情况的最优设备处理能力。垃圾收运路线设计中以运输成本与环保成本作为优化指标,建立了基于K-TSP的运输车辆清运路线模型,并运用蚁群算法进行路网优化。最后对深圳市南山区的厨余垃圾收运问题进行了仿真,仿真结果表明,上述模型和算法能有效地解决城市垃圾分类收运问题。
简介:Problemsaboutdensityareremarkableinthetheoryofdegreesofunsolvability.Owingtotheirdifficultyfewresultshavebeenobtainedtillnow.Sacks1964showedthatther.e.degreesaredense;Fejer1980showedthatnonbrachingdegreesaredenseinther.e.degrees,thisisthefirstnontrivialdefinablesubsetofthedegreesknowntobedense.
简介:<正>BasedonsymboliccomputationsystemMapleandLyapunovstabilitytheory,anactivecontrolmethodisusedtoprojectivelysynchronizetwodifferentchaoticsystems—Lorenz-Chen-Lüsystem(LCL)andRsslersystem,whichbelongtodifferentdynamicsystems.Inthispaper,weachievegeneralizedprojectivesynchronizationbetweenthetwodifferentchaoticsystemsbydirectingthescalingfactorontothedesiredvaluearbitrarily.Toillustrateourresult,numericalsimulationsareusedtoperformtheprocessofthesynchronizationandsuccessfullyputtheorbitsofdrivesystem(LCL)andorbitsoftheresponsesystem(Rsslersystem)inthesameplotforunderstandingintuitively.
简介:Firstly,theRiemannboundaryvalueproblemforakindofdegenerateellipticsystemofthefirstorderequationsinR~4isproposed.Then,withthehelpoftheone-to-onecorrespondencebetweenthetheoryofCliffordvaluedgeneralizedregularfunctionsandthatofthedegenerateellipticsystem’ssolution,theboundaryvalueproblemasstatedaboveistransformedintoaboundaryvalueproblemrelatedtothegeneralizedregularfunctionsinCliffordanalysis.Moreover,thesolutionoftheRiemannboundaryvalueproblemforthedegenerateellipticsystemisexplicitlydescribedbyusingakindofsingularintegraloperator.Finally,theconditionsfortheexistenceofsolutionsoftheobliquederivativeproblemforanotherkindofdegenerateellipticsystemofthefirstorderequationsinR~4arederived.
简介:ThecrystalstructureofDi-nitratobis(ethylcaprolactam)uranyl(Ⅱ)UO2[CH2(CH2)4CONC2H5]2(NO3)2wasestablishedbyasingle-crystalX-raydiffractionstudy.Itistriclinie,spacegroupP1,witha=7.171(2),b=8.655(3),c=10.182(5)A,α=78.27(3),β=70.63(3),γ=81.76(3)°,V=581.7(4)A3,Z=l,Dc=1.94g.cm-3.FinalRvalueis0.0218.Theresultrevealsthaturanylioniscoordinatedtosixoxygenatoms,twoofthemarefromtwocarbonylgroupsofethylcaprolactamandtheotherfourarefromtwonitrategroups.
简介:首先研究了Kleene-Stone代数的由素滤子生成的同余关系的性质,然后在此基础上给出了Kleene-Stone代数的分类,最后证明了对每个KS-n代数L(n),存在一个商代数L(n)/~嵌入于有限的KS-n代数Ω(n)中.
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