{"ID":2868691,"CreatedAt":"2026-06-01T04:54:23.091178241Z","UpdatedAt":"2026-06-01T04:54:23.091178241Z","DeletedAt":null,"paper_url":"https://arxiv.org/abs/2509.15732","arxiv_id":"2509.15732","title":"Discovering Top-k Periodic and High-Utility Patterns","abstract":"With a user-specified minimum utility threshold (minutil), periodic high-utility pattern mining (PHUPM) aims to identify high-utility patterns that occur periodically in a transaction database. A pattern is deemed periodic if its period aligns with the periodicity constraint set by the user. However, users may not be interested in all periodic high-utility patterns (PHUPs). Moreover, setting minutil in advance is also a challenging issue. To address these issues, our research introduces an algorithm called TPU for extracting the most significant top-k periodic and high-utility patterns that may or may not include negative utility values. This TPU algorithm utilizes positive and negative utility lists (PNUL) and period-estimated utility co-occurrence structure (PEUCS) to store pertinent itemset information. It incorporates the periodic real item utility (PIU), periodic co-occurrence utility descending (PCUD), and periodic real utility (PRU) threshold-raising strategies to elevate the thresholds rapidly. By using the proposed threshold-raising strategies, the runtime was reduced by approximately 5\\% on the datasets used in the experiments. Specifically, the runtime was reduced by up to 50\\% on the mushroom\\_negative and kosarak\\_negative datasets, and by up to 10\\% on the chess\\_negative dataset. Memory consumption was reduced by about 2\\%, with the largest reduction of about 30\\% observed on the mushroom\\_negative dataset. Through extensive experiments, we have demonstrated that our algorithm can accurately and effectively extract the top-k periodic high-utility patterns. This paper successfully addresses the top-k mining issue and contributes to data science.","short_abstract":"With a user-specified minimum utility threshold (minutil), periodic high-utility pattern mining (PHUPM) aims to identify high-utility patterns that occur periodically in a transaction database. A pattern is deemed periodic if its period aligns with the periodicity constraint set by the user. However, users may not be i...","url_abs":"https://arxiv.org/abs/2509.15732","url_pdf":"https://arxiv.org/pdf/2509.15732v1","authors":"[\"Qingfeng Zhou\",\"Wensheng Gan\",\"Guoting Chen\"]","published":"2025-09-19T08:02:13Z","proceeding":"cs.DB","tasks":"[\"cs.DB\"]","methods":"[]","has_code":false}