Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: ProUM: Projection-based Utility Mining on Sequence Data   Utility is an important concept in economics. A variety of applications
consider utility in real-life situations, which has lead to the emergence of
utility-oriented mining (also called utility mining) in the recent decade.
Utility mining has attracted a great amount of attention, but most of the
existing studies have been developed to deal with itemset-based data.
Time-ordered sequence data is more commonly seen in real-world situations,
which is different from itemset-based data. Since they are time-consuming and
require large amount of memory usage, current utility mining algorithms still
have limitations when dealing with sequence data. In addition, the mining
efficiency of utility mining on sequence data still needs to be improved,
especially for long sequences or when there is a low minimum utility threshold.
In this paper, we propose an efficient Projection-based Utility Mining (ProUM)
approach to discover high-utility sequential patterns from sequence data. The
utility-array structure is designed to store the necessary information of the
sequence-order and utility. ProUM can significantly improve the mining
efficiency by utilizing the projection technique in generating utility-array,
and it effectively reduces the memory consumption. Furthermore, a new upper
bound named sequence extension utility is proposed and several pruning
strategies are further applied to improve the efficiency of ProUM. By taking
utility theory into account, the derived high-utility sequential patterns have
more insightful and interesting information than other kinds of patterns.
Experimental results showed that the proposed ProUM algorithm significantly
outperformed the state-of-the-art algorithms in terms of execution time, memory
usage, and scalability.

12
The categories of this paper are: nucl-th
3
The categories of this paper are: physics
34
The categories of this paper are: chem-ph
11
The categories of this paper are: hep-lat
24
The categories of this paper are: dg-ga
4
The categories of this paper are: cond-mat
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The categories of this paper are: funct-an
2
The categories of this paper are: math
21
The categories of this paper are: adap-org
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The categories of this paper are: hep-ex
23
The categories of this paper are: solv-int
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The categories of this paper are: nucl-ex
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The categories of this paper are: supr-con
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The categories of this paper are: quant-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: alg-geom