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In other words, if r is the random variable that is one when h min (A) = h min (B) and zero otherwise, then r is an unbiased estimator of J(A,B). r has too high a variance to be a useful estimator for the Jaccard similarity on its own, because is always zero or one. The idea of the MinHash scheme is to reduce this variance by averaging together ...
Example sort hierarchy While many-sorted logic requires two distinct sorts to have disjoint universe sets, order-sorted logic allows one sort s 1 {\displaystyle s_{1}} to be declared a subsort of another sort s 2 {\displaystyle s_{2}} , usually by writing s 1 ⊆ s 2 {\displaystyle s_{1}\subseteq s_{2}} or similar syntax.
The sort-merge join (also known as merge join) is a join algorithm and is used in the implementation of a relational database management system. The basic problem of a join algorithm is to find, for each distinct value of the join attribute, the set of tuples in each relation which display that value.
Samplesort is a sorting algorithm that is a divide and conquer algorithm often used in parallel processing systems. [1] Conventional divide and conquer sorting algorithms partitions the array into sub-intervals or buckets. The buckets are then sorted individually and then concatenated together.
For example, the items are books, the sort key is the title, subject or author, and the order is alphabetical. A new sort key can be created from two or more sort keys by lexicographical order . The first is then called the primary sort key , the second the secondary sort key , etc.
Death rates fell among highly affected HIV subpopulations. Medical breakthroughs have reduced death rates for Americans with HIV, including groups that are disproportionately affected by the virus.
Block Sorting [44] (Sorting by Block Moves) Sparse approximation; Variations of the Steiner tree problem. Specifically, with the discretized Euclidean metric, rectilinear metric. The problem is known to be NP-hard with the (non-discretized) Euclidean metric. [3]: ND13 Three-dimensional Ising model [45]
Jennifer Garner is dressing perfectly on theme for the holidays! On Sunday, Dec. 15, the actress posted a throwback photo of her and her Family Switch costar Ed Helms sporting matching candy-cane ...