%0 Journal Article
%T Eco-value level classification model of forest ecosystem based on modified projection pursuit technique<br>基于改进的投影寻踪的森林生态系统生态价位分级模型
%A WU Chengzhen
%A HONG Wei
%A HONG Tao
%A <br>吴承祯
%A 洪伟
%A 洪滔
%J 应用生态学报
%D 2006
%I 
%X To optimize the projection function and direction of projection pursuit technique,predigest its realization process,and overcome the shortcomings in long time calculation and in the difficulty of optimizing projection direction and computer programming,this paper presented a modified simplex method(MSM),and based on it,brought forward the eco-value level classification model(EVLCM) of forest ecosystem,which could integrate the multidimensional classification index into one-dimensional projection value,with high projection value denoting high ecosystem services value.Examples of forest ecosystem could be reasonably classified by the new model according to their projection value,suggesting that EVLCM driven directly by samples data of forest ecosystem was simple and feasible,applicable,and maneuverable.The calculating time and value of projection function were 34% and 143% of those with the traditional projection pursuit technique,respectively.This model could be applied extensively to classify and estimate all kinds of non-linear and multidimensional data in ecology,biology,and regional sustainable development.
%K Classification
%K Projection pursuit
%K Modified simplex method
%K Forest ecosystem
%K Eco-value level<br>分级
%K 投影寻踪
%K 改进单纯形法
%K 森林生态系统
%K 生态价位
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=42FEDDFE54F8BCD9D5FD1926ABDD7722&aid=462BE74902C8E0A2&yid=37904DC365DD7266&vid=BCA2697F357F2001&iid=38B194292C032A66&sid=FA88DCCE84EA0A56&eid=3E3EF0DB5E6F2DA9&journal_id=1001-9332&journal_name=应用生态学报&referenced_num=10&reference_num=25