简介:监督分类法在遥感影像分类中应用广泛,结合已有地质资料和实测地质剖面信息,将研究区岩性分为苏维依组泥岩和粗砂岩,库姆格列木群泥岩、砾岩和含砾粗砂岩,巴什基奇克组粗砂岩和砾岩,巴西改组细砂岩等8个类型,运用ENVI提供的常用监督分类方法——最大似然法,对研究区的遥感影像进行岩性分类研究。并利用混淆矩阵分别对不同影像的分类结果进行精度评价,结果表明ZY-3影像的分类总体精度达到了78.65%,Kappa系数为0.7606,能够较好地进行岩性信息提取,具有较高的可靠性,可在地质调查工作中推广,能够有效地减少面积性地质测量工作,特别适用于岩石裸露程度较高的艰苦工作区。
简介:Asacontagiousbacterialinfectionthataffectstheconjunctivalcoveringoftheeye,thecorneaandtheeyelids,trachomaiscontrolledbyanendorsedintegratedstrategyconsistingofsurgeryfortrichiasis,antibiotictherapy,facialcleanlinessandenvironmentalimprovement,namely,theSAFEstrategydevelopedbyWorldHealthOrganization.Developedbasedonevidencefrompreviousfieldtrialsandconstantlymodifiedinpractice,SAFEstrategyhasgreatlyboostedtheprogressintrachomacontrol.Regardlessofthefactthattherearestillmanypendingquestions,nationalprogramcoordinatorsareconvincedthattrachomacontrolinitiativebasedonSAFEstrategywouldbeeffective.
简介:Theimpactanglecontroloverguidance(IACG)lawagainststationarytargetsisproposedbyusingfeedbacklinearizationcontrol(FLC)andfinitetimecontrol(FTC).First,thispapertransformsthekinematicsequationofguidancesystemsintothefeedbackablelinearizationmodel,inwhichtheguidancelawisobtainedwithoutconsideringtheimpactangleviaFLC.Forthepurposeofthelineofsight(LOS)angleanditsrateconvergingtothedesiredvalues,thesecond-orderLOSangleisconsideredasadouble-integralsystem.Then,thispaperutilizesFTCtodesignacontrollerwhichcanguaranteethestatesofthedouble-integralsystemconvergingtothedesiredvalues.NumericalsimulationillustratestheperformanceoftheIACG,incontrasttotheexistingguidancelaw.
简介:EllipticPDE-constrainedoptimalcontrolproblemswithL^1-controlcost(L^1-EOCP)areconsidered.TosolveL^1-EOCP,theprimal-dualactiveset(PDAS)method,whichisaspecialsemismoothNewton(SSN)method,usedtobeapriority.However,ingeneralsolvingNewtonequationsisexpensive.Motivatedbythesuccessofalternatingdirectionmethodofmultipliers(ADMM),weconsiderextendingtheADMMtoL^1-EOCP.TodiscretizeL^1-EOCP,thepiecewiselinearfiniteelement(FE)isconsidered.However,differentfromthefinitedimensionalL^1-norm,thediscretizedL^1-normdoesnothaveadecoupledform.Toovercomethisdifficulty,aneffectiveapproachisutilizingnodalquadratureformulastoapproximatelydiscretizetheL^1-normandL^2-norm.Itisprovedthattheseapproximationstepswillnotchangetheorderoferrorestimates.Tosolvethediscretizedproblem,aninexactheterogeneousADMM(ihADMM)isproposed.DifferentfromtheclassicalADMM,theihADMMadoptstwodifferentweightedinnerproductstodefinetheaugmentedLagrangianfunctionintwosubproblems,respectively.Benefitingfromsuchdifferentweightedtechniques,twosubproblemsofihADMMcanbeefficientlyimplemented.Furthermore,theoreticalresultsontheglobalconvergenceaswellastheiterationcomplexityresultso(1/k)forihADMMaregiven.Inordertoobtainmoreaccuratesolution,atwo-phasestrategyisalsopresented,inwhichtheprimal-dualactiveset(PDAS)methodisusedasapostprocessoroftheihADMM.Numericalresultsnotonlyconfirmerrorestimates,butalsoshowthattheihADMMandthetwo-phasestrategyarehighlyefficient.
简介:摘要在法医医学鉴定过程中经常会遇到基因丢失的情况,导致亲子代在基因鉴定过程中出现不符合遗传规律的情况,在一定程度上增加了被错误排除的风险。由于等位基因的缺失在一定程度上和模板的DNA多态性、碱基的插入或缺失有关,因此正确识别和分析等位基因对鉴定结果会产生直接的影响。基于此,本文作者结合自身实践就TH01基因座丢失的相关问题进行相关阐述。
简介:目的通过观察电针干预对卵白蛋白(OVA)诱导的迟发型超敏反应(DTH)模型小鼠中Th1/Th2细胞及其转化因子表达的影响,揭示电针干预改善迟发型过敏反应的作用机理。方法将32只小鼠随机分为对照组(Control)、模型组(OVA-DTH)、电针治疗组(DTH+EA)、假电针治疗组(DTH+Sham),每组8只。电针治疗组予电针“足三里”穴,连续刺激7d;假电针组在“足三里”穴下5mm处的非穴位施行电针,时间同前。分离脾脏单个核细胞,MTT比色法检测细胞增殖情况,流式细胞学检测CD4~+IFN-γ~+T细胞和CD4~+IL-4~+T细胞数量,实时定量PCR和蛋白质印迹法分别检测T-bet及GATA-3mRNA和蛋白的表达。结果电针“足三里”减少T-bet(IFN-γ转录因子)蛋白表达,降低CD4~+IFN-γ~+T细胞比例,抑制Th细胞向Th1分化。结论电针干预通过抑制Th1分化,重建Th1/Th2平衡,改善Th1介导的过敏性皮肤炎症。电针足三里可作为过敏性炎症和Th1介导的炎症反应有效疗法。
简介:摘要本文章简要讨论了在数学中有关圆的不遗漏、不重复的一些问题。通过典型例题与思维方法相结合,强调了师生不要忽视这种问题。