filter of N-order recursion N阶递归滤波器
recursion of order p p次递归式
filter of N-order non-recursion N阶非递归滤波器
Further, it is interesting to note that the order in which DB2 has returned the results exposes how the recursion is processed one level at a time, instead of using a tree-walk.
而且,令人感兴趣的是,DB2返回结果时所依照的顺序暴露了递归如何逐层地而不是采用遍历树的方法进行处理。
In order to construct a tree, the first thing you should think of is recursion.
为了构造一个树,第一件你该想的事情就是递归。
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