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Luz

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Recall is more important than precision when evaluating the expl

Luz5年前 (2021-05-10)1351
Recall is more important than precision when evaluating the explosive detection in airport security. ~@[](2)答案:TRUE…

When measuring the relevancy of the answer set, if the precision

Luz5年前 (2021-05-10)1152
When measuring the relevancy of the answer set, if the precision is high but the recall is low, it means that most of th…

While accessing a term stored in a B+ tree in an inverted file i

Luz5年前 (2021-05-10)1371
While accessing a term stored in a B+ tree in an inverted file index, range searches are expensive. ~@[](1)答案:FALSE…

外排序中,给定 1000 个段和 8 条磁带。如果使用简单的 $$k$$ 路归并,则最少要执行 5 趟(段的生成不算在内)。

Luz5年前 (2021-05-10)1725
外排序中,给定 1000 个段和 8 条磁带。如果使用简单的 $$k$$ 路归并,则最少要执行 5 趟(段的生成不算在内)。~@[](2)答案:TRUE…

Given 1000 runs and 8 tapes. If simple $$k$$-way merge is used,

Luz5年前 (2021-05-10)1143
Given 1000 runs and 8 tapes. If simple $$k$$-way merge is used, the minimum number of passes required is 5 (runs generat…

If there are less than 20 inversions in an integer array, the Qu

Luz5年前 (2021-05-10)1680
If there are less than 20 inversions in an integer array, the Quick Sort will be the best method among Quick Sort, Heap…

After the first run of Bubble Sort, it is possible that no eleme

Luz5年前 (2021-05-10)1145
After the first run of Bubble Sort, it is possible that no element is placed in its final position. ~@[](2)答案:FALSE…

To merge 55 runs using 3 tapes for a 2-way merge, the original d

Luz5年前 (2021-05-10)1501
To merge 55 runs using 3 tapes for a 2-way merge, the original distribution (34, 21) is better than (30, 25). ~@[](2)答案…

To merge 55 runs using 3 tapes for a 2-way merge, the original d

Luz5年前 (2021-05-10)1410
To merge 55 runs using 3 tapes for a 2-way merge, the original distribution (30, 25) is better than (34, 21). ~@[](2)答案…

To merge 55 runs using 3 tapes for a 2-way merge, the original d

Luz5年前 (2021-05-10)2541
To merge 55 runs using 3 tapes for a 2-way merge, the original distribution (34, 21) is better than (27, 28). ~@[](2)答案…