2012年美国大学生数学建模竞赛MCM_A题_树与树叶_一等奖论文

2012美赛论文翻译

Leaf-Mass & Leaves Classification

February 14, 2012

Abstract

In this paper, we present a statistical model to estimate the leaf mass and

classify various leaf shapes based on the data obtained through tree harvest and leaf removal of 21 urban trees. We first explain the diversification of leaf shapes and describe the relationship between leaf shapes and tree profile in order to define the correlation between tree profile and leaf shapes. In order to estimate leaf mass, we apply the regression analysis with four observed independent variables, which allows us to estimate the leaf-mass of a whole-tree. In order to classify leaves, we use hierarchical clustering method according to the dry leaf-mass by Ward's Method. In this method we use the standard Euclidean distance as our principle of classification. Finally we obtain a regression model with vary high coefficient of determination and a good way to classify leaves.

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