The confounding design and the balanced incomplete block design were introduced from the fundamentals of special design , which may be applied to the experiment with fewer homogeneous experimental units and more treatments 根據特種設計的基本原理,介紹了用混雜設計、平衡不完全區組設計以實施基因型同質試驗單元較少而處理數較多的試驗。
A directed balanced incomplete block design ( dbibd ) with order v , block size k and index a , denoted by db ( k , ? ; v ) , is a pair ( x , a ) , where x is a set of v points and a is a collection of transitively ordered k - tuples ( called blocks ) of x , such that each ordered pair of distinct points of x occurs exactly in a blocks 一個階為v ,指標為及區組大小為k的有向平衡不完全區組設計, db ( k , ; v ) ,是指一個序偶( x , a ) ,其中x是一個v元點集, a是x的一族可遷有序k元子集(叫做區組) ,使得x中任意兩個相異點組成的有序對恰出現在個區組中。