例句與造句

1. By computing the cost of the cheapest subtree with size constraints of the partial tree ( this is an upper bound on the cost of the final optimal tree ) and lower bounds on the cost of subtrees of varying sizes that are rooted at nodes of the partial tree , the algorithms can identify and prune nodes that cannot possibly belong to the optimal constrainted subtree
   建樹階段設(shè)置大小限制的修剪算法是通過計算出不完整樹的最小代價得到優(yōu)化樹的代價上限，根據(jù)此上限以及計算出的節(jié)點(diǎn)的實際代價來修剪節(jié)點(diǎn)的。在預(yù)測模型中應(yīng)用了在建樹階段加入大小限制條件的修剪算法。
2. It's difficult to find partial tree in a sentence. 用partial tree造句挺難的