简介：Byadoptingtheevaluationindexsystemofconservationprioritywhichincludedthreatenedcoefficient,geneticcoefficient,utilizationcoefficient,protectionstatuscoefficientandliststatuscoefficient,theendangeredplantsinNortheastChinawerequantitativelyanalyzedandsyntheticallyevaluated,andthevalueofconservationpriorityandconservationprioritygradesoftheendangeredplantsweredetermined.Theresultsshowedthattherewere60speciesofendangeredplantsbelongingto42generaand25familiesinNortheastChina,thevalueofconservationpriorityrangedfrom0.8538-0.3184.Theendangeredplantsweredividedinto3gradesaccordingtotheirvaluesofconservationpriority,17speciesbelongingto15generaand11familieswereinthefirstgradeprotection,18speciesbelongingto14generaand11familieswereinthesecondgradeprotection,25speciesbelongingto17generaand13familieswereinthethirdgradeprotection.Thequantitativelyevaluationindexsystemofconservationpriorityinthispaperrepresentedthedegreeofconservationpriorityoftheendangeredplantscomprehensively,objectivelyandaccurately.

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简介：ConstantineM.Dafermoshasdoneextensiveresearchattheinterfaceofpartialdifferentialequationsandcontinuumphysics.Heisaworldleaderinnonlinearhyperbolicconservationlaws,whereheintroducedseveralfundamentalmethodsinthesubjectincludingthemethodsofrelativeentropy,generalizedcharacteristics,andwave-fronttracking,aswellastheentropyratecriterionfortheselectionofadmissiblewavefans.Hehasalsomadefundamentalcontributionsonthemathematicaltheoryoftheequationsofthermomechanicsasitpertainsinmodelingandanalysisofmaterialswithmemory,thermoelasticity,andthermoviscoelasticity.Hisworkisdistinctlycharacterizedbyanunderstandingofthefundamentalissuesofcontinuumphysicsandtheirroleindevelopingnewtechniquesofmathematicalanalysis.

简介：AccordingtotheunificationprincipleofsystemstructureandsystemfunctionoftheWaterResourceConservationForests,sevenfactorswereselectedfromstandspatialstructure,treesstructureandhealthyofwoods,themultifunctionmanagementoptimizationmodeltargetwasconfirmedbyusingnonlinearitymulti-objectiveprogrammingapproach,andthetargetfunction-standspatialstructurehomogeneityindexwasdefinedtoestablishspatialoptimizationmodelswithrestrainingconditionssetupindiversityofstandstructureandspatialstructure.ThespatialstructureofavailabletypicalstandinthewetlandareainsouthernDontingLakewasoptimizedbymeansofselectivecuttingandreinforcementplanting.Theresultsshowedthatthespatialstructurewasimprovedobviouslyandtreesdiversityandstandhealthwerenotweakened.It’ssuggestedthattheestablishedoptimizationmodelcaneffectivelyguidemultifunctionmanagement,standstructureoptimizationandthesteadinessofecologicalecosystemanditisconvenientandoperableinpractice,andit’sveryimportanttoprotectandrecoverecosystemofWaterResourceConservationForests.