简介：Multi-functionaldendrometerisakindofforestrytoolthatcanmeasuremultiplefactorsofforest.Bycombiningsensortechnologyandcomputertechnology,adigitalmulti-functiondendrometerhasbeendeveloped,whichintegratedthefunctionsofmeasuringheight,distance,azimuth,slope,elevation,formquotientofanypartsofthestemintoonebodyatthesametest.Thedendrometercanfitthecomplexforestenvironment,solvethedifficultproblemsinaspectsofplantheight,measuredistance,centraldiameterandformquotientofbreastheight.Theaccuracycanmeettherequirementsofgeneralforestsurvey.

简介：Stochasticfrontierproductionfunctionapproachisadopted,93farmersampleshavebeencollected,pureefficiency,technicalefficiency,technicalchangeandscaleefficiencyandtheinstitutionalcontributionhavebeencalculated.Theresultsindicatedthatincreasingproductivityisthesolemeasurementtoreducepoverty,institutionandtechnicalchangearethetwokeyfactors.Therefore,stableinstitution,improvingtechnicalchangesarerequired.Atpresent,itisurgenttomaketechnicalprogre...