简介：Toprotecttheecologicalbalanceandtheenvironmentforourexistence,ChinahasorganizedtheprojectstoRescueSevenKindsofAnimals,thepanda,ibis,Yangtzecrocodile,Hainandeer,David’sdeer,bignosedantelop,andwildhorsewhichareinimminentdanger.Pandaprotectionproject.From1992totheyear2000,14pandareserveswillbeestablished,covering4,242sqkm,including2,479sqkmforthehabitationofpandas.Theconstructionandmanagementofthe.13existingpandareserveswillbeimproved,covering5,380sqkin.And17newreservecorridorswillbesetupand32stationswillbebuiltin32

简介：IntroductionShort-to-imminentprecursorsstillarethemainbasisforearthquakepredictioninthepresenttime.Strongquakes,especiallythosewithnoforeshocks,canbeforecastedtosomeextentbasedonabundantshoat-to-imminentprecursorsandcombiningwiththemid-to-longtermvar...

简介：Accordingtostudiesofmorethan20earthquakeswithMS≥5.0inNorthChina,sevenfeaturesoftheshort-termandimminentearthquakeprecursorshavebeensummarizedinthispaper.Atthesametime,takingtheshort-termandimminentearthquakestageasthephysicalprocessofasource’smediumsofteningandfaultcreep,wecalculatedtemporalvariationofmeanstress,maximumshearstress,bodystrain,andporepressureinsomecertainpoints(supposedstations)inthesourceareaanditsadjacentareabyusingananisotropicandnonlinearsourcemodelandafiniteelementmethod.Accordingtoananalysisofthesetheoreticalcurves,weconcludethattheshort-termandimminentearthquakeprecursorshavesuchcharacteristicsascomplexshapes,exponentialgrowthoftheprecursornumberwithtune,andprecursors’migrationfromtheoutsideareatothesourcearea,whichtoacertainextentrevealthecauseofthecharacteristicsoftheshort-termandimminentearthquakeprecursorfield.