Log mean divisia index method was adopted to analyze the effects of activity level , market share and energy intensity of various transportation systems on energy consumption of passenger and fright transportation 本研究的目的在于?集整理運輸部門的運輸活動量與能源消費量,并就各運輸系統(tǒng)的延入公里數(shù)及延噸公里數(shù)進行推估。