中国国内一次能源供应多样性计算与分析

利用香农-威纳多样性指数(Shannon-Weiner index),计算和分析了中国国内一次能源供应多样性的变化情况.结果表明在1949~2005年,中国国内一次能源供应多样性从最开始的单一品种逐步向多品种趋势发展.在1951年时香农指数最小为0.154 5,此时能源供应品种只有3种,均衡度最小为0.096,煤炭供应占据能源供应的97%,石油和水电的供应共占能源供应的3%,这是中国国内一次能源供应品种最少的时候,能源的供应几乎只有煤炭一个品种.这种多样性趋势的变化在2001年时达到了最高点,此时香农指数最大为0.866 9,能源供应品种达到了5种,均衡度最大为0.538 7,各种一次能源供应...

Calculation and Analysis of Diversity of Domestic Primary Energy Supply

The change in the diversity of China's primary energy supply was calculated and analyzed using the Shannon-Weiner index.The results showed that,from 1949 to 2005,the primary energy supply tended towards varied resources from the initial single one.In 1951,there were only 3 kinds of supplying resources and the minimum Shannon-Weiner index was 0.1545 with the minimum evenness 0.096,where the coal came up to 97% of the total supply and the rest including petroleum and hydropower was so poor that was just about 3%.In that period China's primary energy supply was at the lowest level.In 2001,the diversity of energy supplies came up to its peak,i.e.,the maximum Shannon-Weiner index was 0.8669 with the maximum evenness 0.5387,including 5 kinds of supplying resources available.The differences between the percentages of those primary energy supplies became lowest in that year.