This paper presents the limitations of existing theories meant to explain parasitic gaps in relation with weak crossover effect and Across the Board gaps.
本文分析比较了寄生语缺与弱跨越、并列语缺的相关研究，发现表征式理论有很大的局限性，不符合最简方案的精神。
It proves a schema theorem for genetic algorithms in which representation schema is based on graph grammar. The effect of crossover and mutation on schemata is described.
证明了一个基于图文法表示机制的遗传算法模式定理，描述了交叉和突变对模式作用的效果。
The most important requirment for analysis and interpretation of the crossover design is that there is no carry-over effect from the first treatment to the second.
应用交叉设计进行治疗试验的关键在于，第二期治疗时，先用药物的残余效应已不存在。
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