不同造林密度杉木速生丰产林经济效益主成分分析及政策优化

根据现代技术经济分析原理，拟定一个轮伐期，对杉木生长进行模拟，对其效益采用动态多指标描述，并运用主成分分析处理，提取主要指标，用主分量指数模型评判，从而建立了系统、合理的速生产林经济效益评价程序。结果表明：这种处理有明显的实际意义，其主分量指数不借助于定性知识就有很强的排序功能，描述性更为客观，从而为不同方案，不同时空条件下速生丰产经济评价提供了可行性依据。

PRINCIPAL COMPONENT ANALYSIS AND POLICY OPTIMIZATION FOR THE ECONOMIC EFFECT OF DIFFERENT DENSITY FAST GROWTH AND HIGH PRODUCTION CHINESE FIR FOREST

This essay indicated the informality of traditional economic evaluation for the fast growth and high porduction Chinese fir forest.According to the principle of modern technical economic analysis,the chinese fir growth progress was simucated in a single cutting cycie,its gain was described with dynamical multi indices and processed with prinicipal component analysis.Then the principal components were selected and evaluated with principal component index model.On this basis,a systematical and reasonable evaluating program was constructed for fast growth and high production Chinese fir forest.The result indicated that this kind of process was advantageous in utilization.In case that there was no qualitative information,the ordinating function of the principal component indices were still perfect.The describility of this kind of process was more physical than the traditional one.So reliable accordance could be supplied for the economic evaluation of fast growth and high production Chinese fir forest under the condition of different program and different time.