标题: 关于一个定义的解释，请求帮忙！ [打印本页] 作者: skysophie 时间: 2010-9-18 15:05 标题: 关于一个定义的解释，请求帮忙！ Definitions.-An arrangement of v objects (called treatments) in b sets- W; n) T; A7 p f* l+ {; ]
(called blocks) will be called a pairwise balanced design of index unity and type ) k$ I2 t7 k3 `* m/ |6 o! a(v; ki, k2, .. ., ki) if each block contains either k1, k2, .. ., or km treatments which1 ]( ] E7 H/ s% P
are all distinct (k, < v, k, $ kj), and every pair of distinct treatments occurs exactly, V% o3 }4 T B' c
in one block of the design. If the number of blocks containing k, treatments is ) ~/ E, r. T9 h: fb,, then clearly b = A bi, v(v-1) = i biki(k -1)。。。+ B3 D3 F t& L8 |2 Q, G& d
& F: g) W _+ b% w谁能帮我解释一下，可以举个简单的例子。。谢谢！~ J- P% U; }+ k& q, ~作者: 角凳 时间: 2010-10-12 23:26
是告诉我们这是哪个领域的么？？
