水土保持研究2017，Vol.24Issue(3)：206-213,8.
基于BP-ANN模型的农村土地生态安全评价及影响因素分析——以重庆市丰都县为例
Evaluation on Ecological Security and Analysis of Influence Factors of Rural Land Based on BP-ANN Model——A Case Study of Fengdu County in Chongqing
摘要
Abstract
Aiming at ecological sensitive characteristic of rural land and the real regional situation in Fengdu County,a comprehensive assessment model of rural land ecological security based on Back-Propagation Artificial Neural Network (BP-ANN) was set up,which contained 15 cryptic layer nodes and 3 layers.The 70％ of 200 samples which randomly selected from 317 samples in 2013 were chosen as the training samples,and the 30％ of 200 samples were regarded as examining samples.We tested the 117 test samples using this model,evaluated the rural land ecological security of Fengdu County in 2014,and analyzed its spatial distribution,finally extracted the main factors that affected the rural land ecological security with factor analysis and multiple linear regression.The results showed that:(1) the test samples with the relative error less than 5 ％ of all the 117 test samples accounted for 98.21％,which indicated that the accuracy of BP-ANN model is good;(2) the score of rural land ecological security of Fengdu County in 2014 ranged from 40.47 to 55.73,with a mean value of 49.19;the Global Morans' I index of rural land ecological security was 0.34,and the space was the autocorrelation;the rural land ecological security status of the northwest region was better than the southeast region;(3) factors influencing the rural land ecological security situation in Fengdu County can be sorted as:biomass and vegetation,soil,landscape diversity,ecological construction and development coordination degree,rainfall,water area.BP-ANN model can partly overcome the error caused by the subjective judgment in the traditional evaluation process,and the accurate evaluation results can also provide guidance to the regional land ecological protection.关键词
土地生态安全/评价/BP-ANN模型/农村土地/丰都县Key words
land ecological security/evaluation/BP-ANN model/rural land/Fengdu County分类
管理科学引用本文复制引用
杨人豪,杨庆媛,曾黎,陈伊多..基于BP-ANN模型的农村土地生态安全评价及影响因素分析——以重庆市丰都县为例[J].水土保持研究,2017,24(3):206-213,8.基金项目
“西南山区生态敏感区典型区域土地生态状况信息提取与精细评估”项目(201315106397) （201315106397）
