一种地磁匹配制导适配性特征参数选取方法

A Method of Selection Matching Suitability Characteristic Parameter Based on Rough Set Theory in Geomagnetism Matching Guidance

为了评价地磁场特征参数对适配性的影响程度,达到选取重要特征参数目的,提出了一种基于粗糙集理论的地磁匹配制导适配性特征参数选取方法。通过分析粗糙集理论的基本原理,确定了特征参数选取的试验步骤;选取了适配性评价中具有代表性的6种特征参数作为条件属性集,在选定的28块区域基于积相关算法(PROD)进行了匹配仿真试验,选取匹配概率作为决策属性集,针对粗糙集理论只使用于离散数据的特点,分别对条件属性集和决策属性集进行了离散化处理;然后根据确定的试验步骤,对选定区域进行了特征参数选取试验,得到了约简特征参数集合,通过数据分析发现:提出的特征参数选取方法在不需要任何先验信息的情况下提取了约简特征参数集合,有效地排除了冗余信息的干扰,达到了选取重要特征参数的目的。

A method of characteristic parameter selection for geomagnetic matching guidance suitability based on rough sets theory was introduced to evaluate the influence of the parameter on matching suitability and attain the most suitable selection. The process of parameter selection trial was confirmed through the fundamental analysis of rough sets theory. Six representative charac- teristic parameters were selected as a condition attributes set. The matching simulation trials were implemented in selected 28 areas using PROD and matching probability was selected as the decision-making attributes. The condition attributes and decision-making attributes sets were dispersed since the rough sets theory could only be used to process discrete data. At last, characteristic param- eters selection trials were implemented in the areas according to the procedure. The data analysis indicates that the new characteristic parameter selection method can pick-up simple parameters set without any prior information and can effectively eliminate the interference of redundant information and the most suitable parameters are selected.