Data structures are reusable because they tend to be modular and context - free.

因为数据结构趋向于模块化并和环境无关,所以数据结构是可以复用的.

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Proposes the context - free grammar model for GEP.

对基因表达式编程建立了上下文无关文法模型.

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There is a very close relation between fuzzy pushdown automata and fuzzy context - free grammars.

:Fuzzy下推自动机与Fuzzy上下文无关文法有紧密的关系.

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Proves that the presentation power of GEP and the context - free grammar with one none - terminal are equivalent.

指出基因表达式编程和仅含有单个非终结符的上下文无关文法在描述能力上是等价的.

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Common phrase structure grammar ( chomsky hierarchy ), which is the most commonly used context - free grammar ( CFG ).

一般用文法grammar) 来刻画.常见的是短语结构文法 ( chomskyhierarchy ), 其中最常用的是上下文无关文法 ( CFG ).

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Meanwhile a method to construct a normalized form for a lattice - valued context - free tree grammar is presented.

同时给出了构造正规形式的等价文法的方法.

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