The writer, with applying the theory and method of Fuzzy total evaluation, used the transformation function to transform each index parameter to be used to classify into a feature index (di) within an interval 10,11, and mean while, gave each index parameter a weight (ai), which can show the important d.
应用Fuzzy综合评判的理论和方法,对参加分类评判的各项指标参数通过映射的方法,使每一个指标参数转换成在区间[0,1]的特性指数(d_1),同时引入一个能反映每项指标参数在评判中重要程度的权值(a_1),求得一个能统一反映湖库营养程度的综合性评价指数的计算公式:e=∑a_1d_1。
The distributions of species richness and species Endemic Index and their relationships with climatic and geographic characters of Chinese Fagaceae were studied.
而海峡等生态、地理隔离因子及空间异质性等对特有性指数的增加有明显的促进作用。
