Formula grammar tree 公式语法树
This paper implements a mathematical formula recognition tool by establishing a math expression grammar in broad sense and analytical program.
通过建立广义数学表达式的文法规则以及分析程序，实现了基于专家系统的公式识别器。
Context free grammar extended by constrained formula and an improved LR parser are adopted to formalize and recognize the special strings.
提出从组成形式和上下文语境两个方面来自动识别汉语文本中的各种特殊符号串。
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