简介：Energyplaysanimportantroleintheeconomiclife.Withtherapiddevelopmentofeconomy,theconstraintofenergyonthesustainabledevelopmentofeconomyisbecomingmoreandmoreobvious.ThispaperjuststudiesthefactorsinfluencingenergyefficiencyofChinaandtherelationshipbetweenenergyefficiencyandChina'seconomicgrowth.ByusingtimeseriesmultivariablelinearregressionmethodswithChina'srelevantdatafrom1953to2006,thispaperconstructstheregressionmodeltoanalyzethefactorsthatwouldimpactenergyefficiency.Afterthat,aregressionmodelofChina'srealoutputtocapital,laborandenergyefficiencyisconductedtoestimatethemarginalcontributionofeveryfactortotherealoutputtoprovethefundamentalinfluenceofenergyefficiencytotheeconomicgrowth.Intheend,somepoliciesandrecommendationsarealsoputforwardinordertoimprovetheenergyefficiencyofChina.

简介：NowadaysthefasteconomicdevelopmenthasbroughtaboutseriousconflictsbetweenthelimitedlandresourcesandtheincreasinglanddemandinChuzhouCity.Thechangesoflandusestructurealsorestricteconomicdevelopmentandsocietyprogressinthisarea.Becausedifferentcitieshavedifferentfunctionallocalization,thecityareaandeachcounty(city)haveformedcharacteristiclandutilizationstructure.Itisofgreatsignificancetomakerationaluseoflandresourcesandensurethesustainableuseoflandresourcesbyanalyzingthevariationoflandusestructureinthecityareaandeachcounty(city)inChuzhouCity.BasedonthedataoflandusemodificationofChuzhouCityfrom1996to2005andadoptingthequantitativeanalysisoflandscapeecology,thispaperstudiesquantitativelythetemporaldivisionofregionallandusestructureanditsdynamicchanges.Theresultsindicatethat:(1)thismethodcanrevealthelawofthevariation;(2)thevariationoflandusestructureinChuzhouCity:increasingdiversification,evennessandheterogeneity;(3)theintensityofchangeinlandusefrom1996to2005inthecityappearedinthesequence:grassland>trafficland>gardenland>virginland>forestland>industrialandresidentialland>cultivatedland>otheragriculturalland>waterfacilityland;(4)therewereremarkabledifferencesbetweenthecityareaandeachcounty(city)intherelativechangeandthelandusestructurechangefrom1996to2005.ThispaperanalyzesthevariationoflandusestructureinChuzhouCity,andfinallyproposesrelatedcountermeasuresandsuggestions.