基于空间多标准分析的海水养殖空间布局优化标准研究

Establishing Standards for Spatial Layout Optimization of Mariculture in China based on Spatial Multi-Criteria Analysis(SMCA)

摘要:

基于空间多标准分析方法,从最优产量、最优结构、最优用海比例、最优优化次序四个方面,构建海水养殖业空间布局优化标准指标体系,该指标体系包括4个一层指标、10个二层指标和36个三层指标。根据最优化理论,为三层指标制定最小合格标准、最大合格标准和最优标准,并推算出标准化得分的计算公式。各指标得分经加权得到目标区域海水养殖业空间布局优化的综合得分,并采用等差赋值法对综合评分进行分级,将海水养殖空间布局优化合理程度划分为不合理、过渡阶段、合理三大类,将优化水平划分为极度差、非常差、差、较差、濒临差、勉强好、较好、好、良好、非常好十小类。计算二层指标得分与最优二层指标得分的比值,根据该比值判定海水养殖空间布局优化成效。

Abstract:

Based on spatial multi-criteria analysis(SMCA), the index system of spatial layout optimization of Mariculture is established according to four aspects which are the optimal production, the optimal structure, the optimal proportion of sea and the optimal using order, including 36 indexes which is divided into three layers. In addition, according to the optimization theory, the minimum standards, the maximum qualified standards and the optimal standards for the three-layer indices are constructed and the calculation formulas for the standardized scores are given. Then the composite scores of mariculture spatial layout optimization, obtained by weighted score for each indicator ,are divided into three stages, unreasonable, transition and reasonable stage, and ten different degrees from the worst to the best degree on the method of equivalence assignment. At last, the efficiency of the spatial layout is determined by the ratio of the second-layer score to its optimal score.