数学公式具有含义丰富的二维结构,而视障者无法识别数学公式的特殊结构,数学公式的阅读和理解给视障者的学习带来了诸多困难.为实现数学信息无障碍,制定了一套数学公式基本读法规则MathAL.该规则利用指示符确定数学公式中操作符的作用范围,提出原子公式概念,减少指示符冗余.经验证,通过该规则的学习,数学公式歧义性降低到了8.5\%,数学公式的发音长度缩短了15.6\%,更加符合人们阅读数学公式的习惯.

Mathematical formula with two-dimensional structure has a variety  of meanings. But the visually-impaired couldn't see and recognize the special  structure of the mathematical formula. So reading and understanding of the  mathematical formula has brought many difficulties for the visually-impaired  learning. For the mathematical information accessibility, we develop a set  of mathematical formula pronunciation rules. The rules determine the scope of  the operator in the mathematical expressions by the indicators. In addition,   the definition of the Atomic Formulas has reduced the redundancy of the indicators.  By learning the MathAL rules, it is proved that mathematical formula ambiguity has dropped to 8.5\% and the length of the pronunciation has shortened by 15.6\%.  The pronunciation is more in line with the reading habit of mathematical formula.