中文摘要：

分析了逻辑函数的K图和降维K图，在此基础上，从逻辑函数定义出发，讨论了用K图和降维K图计算逻辑函数一阶布尔E-导数和二阶布尔E-导数的图形方法，实例表明该方法具有直观、简单等特点，并且能给出布尔E-导数的最简与／或式．

英文摘要：

The K-map and reduced-dimension K-map of a logic function were analysed, based on which, the graphic methods calculating first-order and second-order Boolean E-derivative by using K-map and reduced-dimension K-map according to the definition of logic functions are proposed. The examples show that this method has the features of intuition and simplicity, and it can also obtain the simplest AND/OR expression of Boolean E-derivative.