简介：AnovelalgorithmcalledColonyLocationAlgorithm(CLA)isproposed.Itmimicsthephenomenainbioticconmunitythatcoloniesofspeciescouldbelocatedintheplacesmostsuitabletotheirgrowth.Thefactorsworkingonthespecieslocationsuchasthenutrientofsoil,resourcecompetitionbetweenspecies,growthanddeclineprocess,andeffectonenvironmentwereconsideredinCLAviathenutrientfunction,growthanddeclinerates,environmentevaluationandfertilizationstrategy.CLAwasappliedtosolvetheclassicalassignmentproblems.ThecomputationresultsshowthatCLAcanachievetheoptimalsolutionwithhigherpossibilityandshorterrunningtime.

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简介：Thispaperdealswiththebifurcationproblemsofmultiparameterandmultibranchandtheirapproximations.Itderivesgeneralapproximationresultsofsolutionbranchesintheneighbourhoodofasingular(limit,turningormultibranch)point,andshowsthatturningandmultibranchpointsarebifurcationpoints.TheabstracttheoriesareappliedtoamixedfiniteelementapproximationofstationaryNavier-Stokesequation.

简介：Inthispaper,wepresentanalgorithmforsolvingaclassoftransportationproblemsandshowthatitisgloballyconvergent.Thepropsedalgorithmissimpletoimplementandeasytoparallelize.Thenumericalresultsindicatethattheproposedalgorithmiseffectiveforthisclassofproblems.

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简介：Sincetheseventies,worldeconomyhasbeenengagedinadjustmentprinci-pallyinthefollowingthreefields.First,theshiftofeconomicdevelopmentmodefromthatofaggregatequantitativegrowthtothatofquality-effective-ness.Second,thereformofeconomicsystemwithmoreandmorecountriesrealiz-ingmarketeconomy.Third,theeconomygettingmoreopenedaseconomicglobal-izationfurtheravdances.

简介：Thispaperisintendedtobeafirststeptowardsthecontinuousdependenceofdynamicalcontactproblemsontheinitialdataaswellastheuniquenessofasolution.Moreover,itprovidesthebasisforaproofoftheconvergenceofpopulartimeintegrationschemesastheNewmarkmethod.WestudyafrictionlessdynamicalcontactproblembetweenbothlinearlyelasticandviscoelasticbodieswhichisformulatedviatheSignorinicontactconditions.ForviscoelasticmaterialsfulfillingtheKelvin-Voigtconstitutivelaw,wefindacharacterizationoftheclassofproblemswhichsatisfyaperturbationresultinanon-trivialmixofnormsinfunctionspace.Thischaracterizationisgivenintheformofastabilityconditiononthecontactstressesatthecontactboundaries.Furthermore,wepresentperturbationresultsfortwowell-establishedapproximationsoftheclassicalSignorinicondition:TheSignoriniconditionformulatedinvelocitiesandthemodelofnormalcompliance,bothsatisfyingevenasharperversionofourstabilitycondition.

简介：Inthispaper,weakandstrongconvergencetheoremsareestablishedbyhybriditerationmethodforgeneralizedequilibriumproblemandfixedpointproblemsofafinitefamilyofasymptoticallynonexpansivemappingsinHilbertspaces.Theresultspresentedinthispaperpartlyextendandimprovethecorrespondingresultsofthepreviouspapers.

简介：基于HJ－1A／1B卫星ccD数据，建立河北省近海海域沿岸冰、初生冰、灰冰和灰白冰的解译标志。利用易康分类软件，采用多边形的面向对象分类方法，根据海冰类型和其他地物特征，对HJ－1A／1B卫星数据进行多尺度分割。选择各类型海冰样本，采用最邻近分类像元算法对海冰进行分类。统计河北省海域及秦皇岛港、曹妃句、黄骅港等重点区各类型海冰分布面积，分析海冰分类分布情况。最后，介绍了应用HJ-1A／1B卫星遥感数据提取河北近海海域海冰分类分布信息的实例。

简介：各省、自治区、直辖市人民政府，国务院各部委、各直属机构：我闻人多地少，耕地资源稀缺，当前又正处于工业化、城镇化快速发展时期，建设用地供需矛盾十分突出。切实保护耕地，大力促进节约集约用地，走出一条建设占地少、利用效率高的符合我旧国情的十地利用新路了，是关系民族生存根基和国家长远利益的人计，是全面贯彻落实科学发艉观的具体要求，是我国必须长期坚持的一条根本方针。现就有关问题通知如下：

简介：'杭电评价科学研究院'(ID:casee2017)是以杭州电子科技大学中国科教评价研究院为账号主体的微信公众平台,关注并发布国内外评价领域相关文章。中国科教评价研究院是杭州电子科技大学于2017年成立的一所相对独立的重点评价研究机构。

简介：摘要:近几年我国经济不断发展的同时，城市风险也在不断增加、地震、疫情、暴雨、干旱等天气持续影响着环境和人们生活的质量，城市中如何在突发事件面前的迅速应变能力是考验一个城市是否“韧性”的重要标志。而社区作为社会最小的单元，与“人”生活最为密切的空间，其应变能力的高低决定

简介：法院人员管理空间究竟呈何态势、受何影响、如何操控,在不同的"田野方法"可能种出不同的"果实"。为站在更为广阔的视野和运用比较科学的方法了解分析当下法院人员管理态势,本文试图从统计学、管理学、经济学的视角出发,以沿海G省F市近年审判数据与管理体系为主要样本,通过定量、证实分析,在深刻探究法院人员管理二维现状及制约因素的基础上,初步提出多维科学管控法院人才的现实路径,希望对当下的司法改革有所启发:首先,建立符合司法规律的审判权力运行模式;其次,构建以审判为中心的法院内部组织架构;再次,建立以职业化为方向的人员分类管理体系。

简介：【摘要】G.D包装机一号轮在设备运行过程中，烟支组与护烟板时刻都在发生磨擦现象，护烟板磨损严重时，会造成烟支触头等问题，护烟板前端与轮体的中心距离为130mm，因难以测量护烟板前端与轮体中心之间的距离，所以会增加更换和安装护烟板工作的难度。所以如何缩短维修时间和减少零部件损坏成了最需要解决的问题。

简介：隋唐以来，扬州即以经济繁荣而著称，是一座历史文化名城。进入清代．经康熙、雍正、乾隆三朝百年的发展，已成为我国东南沿海的贸易中心。经济的繁荣使各地的文人名士汇集扬州，进行诗文书画交流与创作，促进了地区文化艺术事业的兴盛，出现了一批画家，“扬州八怪”是其中最具有代表的画家群体。

简介：Resolventmethodsarepresentedforgeneratingsystematicallyiterativenumericalalgorithmsforconstrainedproblemsinmechanics.Theabstractframeworkcorrespondstoageneralmixedfiniteelementsubdif-ferentialmodel,withdualandprimalevolutionversions,whichisshowntoapplytoproblemsoffluiddynamics,transportphenomenaandsolidmechanics,amongothers.Inthismanner,Uzawa’stypemethodsandpenalization-dualityschemes,aswellasmacro-hybridformulations,aregeneralizedtononnecessarilypotentialnanlinearmechanicalproblems.

简介：AboundaryproblemfortheKlein-GordonequationinthestripO≤t≤Tisconsideredwiththeboundarycondition:theinitialstateatt=Oandthefinalstateatt=T.Itisproventhattheproblemadmitsofaninfinitenumberofsolutions.Thesameresultholdsforageneric2ndorderhyperbolicequationin2-variables.Usingtheresultforthewaveoperatorin3-spacedimensionswegiveamethodtoreconstructfunctionswhoseintegralonallunitspheresinR~3isagivenfunction.

简介：Mostenvironmentalissuesandpolicydesigningareuncertainandirreversible;therefore,thetimingofenvironmentalpolicyimplementationbecomesespeciallyimportant.Thispaperestablishesarandomdynamicprogrammingmodelandanalyzestheoptimaltimingproblemsinenvironmentalpolicyunderuncertainvariables.Thismodelresultsindicatethattwovariableshaveasignificantimpactonthetimingofenvironmentalpolicyimplementationandtheyworkinoppositedirecfons:ononehand,themoreuncertaintheeconomyis,thehigherthecostofpoliciesimplementationwillbe,andconsequentlytheincentivetoimmediatelyadoptthepolicywillbestronger.Ontheotherhand,thehighertheuncertaintyoftheenvironmentis,thestrongertheirreversibilityofecologicalharmcausedbypollutantsperunitwillbe.Therefore,thegovernmentshouldimplementnewenvironmentalpoliciesasearlyaspossibleinordertogainmoreecologicalbenefits.

简介：AnegativecurvaturemethodisappliedtononlinearleastsquaresproblemswithindefiniteHessianapproximationmatrices.Withthespecialstructureofthemethod,anewswitchisproposedtoformahybridmethod.Numericalexperimentsshowthatthismethodisfeasibleandeffectiveforzero-residual,small-residualandlarge-residualproblems.