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Text indexing is a fundamental and well-studied problem. Classic solutions either replace the original text with a compressed representation, e.g., the FM-index and its variants, or keep it uncompressed but attach some redundancy - an index…

Data Structures and Algorithms · Computer Science 2026-02-05 Lorraine A. K. Ayad , Gabriele Fici , Ragnar Groot Koerkamp , Grigorios Loukides , Rob Patro , Giulio Ermanno Pibiri , Solon P. Pissis

Retrieval-augmented generation (RAG) systems expose numerous design choices spanning query rewriting, chunking, retrieval depth, reranking, and context compression. In practice, these choices are often configured through heuristics,…

Artificial Intelligence · Computer Science 2026-05-29 Zhen Chen , Yibing Liu , Weihao Xie , Yu Liang , Peilin Chen , Shiqi Wang

Regular expressions are a fundamental concept in computer science and widely used in various applications. In this paper we focused on deterministic regular expressions (DREs). Considering that researchers didn't have large datasets as…

Databases · Computer Science 2018-06-01 Yeting Li , Xinyu Chu , Xiaoying Mou , Chunmei Dong , Haiming Chen

Industrial standards and normative documents exhibit intricate hierarchical structures, domain-specific lexicons, and extensive cross-referential dependencies, which making it challenging to process them directly by Large Language Models…

Information Retrieval · Computer Science 2026-04-14 Aiman Al Masoud , Marco Arazzi , Simone Germani , Antonino Nocera

Retrieval-Augmented Generation (RAG) has recently emerged as a method to extend beyond the pre-trained knowledge of Large Language Models by augmenting the original prompt with relevant passages or documents retrieved by an Information…

Regular expression (RE) matching is a very common functionality that scans a text to find occurrences of patterns specified by an RE; it includes the simpler function of RE recognition. Here we address RE parsing, which subsumes matching by…

Distributed, Parallel, and Cluster Computing · Computer Science 2025-03-11 Angelo Borsotti , Luca Breveglieri , Stefano Crespi Reghizzi , Angelo Morzenti

Using natural language to query visual information is a fundamental need in real-world applications. Text-Image Retrieval (TIR) retrieves a target image from a gallery based on an image-level description, while Referring Expression…

Computer Vision and Pattern Recognition · Computer Science 2025-08-22 Xiangzhao Hao , Kuan Zhu , Hongyu Guo , Haiyun Guo , Ning Jiang , Quan Lu , Ming Tang , Jinqiao Wang

Existing support for regular expressions in automated test generation or verification tools is lacking. Common aspects of regular expression engines found in mainstream programming languages, such as backreferences or greedy matching, are…

Programming Languages · Computer Science 2020-03-16 Blake Loring , Duncan Mitchell , Johannes Kinder

Backreferences and lookaheads are vital features to make classical regular expressions (REGEX) practical. Although these features have been widely used, understanding of the unrestricted combination of them has been limited. Practically,…

Formal Languages and Automata Theory · Computer Science 2024-04-29 Yuya Uezato

While the ``deep reasoning'' paradigm has spurred significant advances in verifiable domains like mathematics, its application to open-ended, creative generation remains a critical challenge. The two dominant methods for instilling…

Artificial Intelligence · Computer Science 2025-09-09 Haozhe Wang , Haoran Que , Qixin Xu , Minghao Liu , Wangchunshu Zhou , Jiazhan Feng , Wanjun Zhong , Wei Ye , Tong Yang , Wenhao Huang , Ge Zhang , Fangzhen Lin

Matching regexes (regular expressions) is a common problem in many areas of computer science, with requirements on high speed and robust performance. Regexes with backreferences allow one to express certain patterns (even beyond regular)…

Logic in Computer Science · Computer Science 2026-04-16 Vojtěch Havlena , Lukáš Holík , Ondřej Lengál , Jan Vašák , Sabína Gulčíková

This paper describes a new approach, called Terminological Bucket Indexing (TBI), for efficient indexing and retrieval of both nested and super terms using a single method. We propose a hybrid data structure for facilitating faster indexing…

Data Structures and Algorithms · Computer Science 2019-05-24 Md Faisal Mahbub Chowdhury , Robert Farrell

We introduce SIRI, Scaling Iterative Reinforcement Learning with Interleaved Compression, a simple yet effective RL approach for Large Reasoning Models (LRMs) that enables more efficient and accurate reasoning. Existing studies have…

Machine Learning · Computer Science 2025-09-30 Haoming Wen , Yushi Bai , Juanzi Li , Jie Tang

Unified information extraction (UIE) aims to extract diverse structured information from unstructured text. While large language models (LLMs) have shown promise for UIE, they require significant computational resources and often struggle…

Computation and Language · Computer Science 2025-01-22 Xincheng Liao , Junwen Duan , Yixi Huang , Jianxin Wang

We introduce the Overall Performance Index (OPI), an intrinsic metric to evaluate retrieval-augmented generation (RAG) mechanisms for applications involving deep-logic queries. OPI is computed as the harmonic mean of two key metrics: the…

Artificial Intelligence · Computer Science 2024-10-07 Junyi Hu , You Zhou , Jie Wang

Bitmap indexes are commonly used in databases and search engines. By exploiting bit-level parallelism, they can significantly accelerate queries. However, they can use much memory, and thus we might prefer compressed bitmap indexes.…

Databases · Computer Science 2016-04-12 Samy Chambi , Daniel Lemire , Owen Kaser , Robert Godin

We present a distributed full-text index for big data applications in a distributed environment. Our index can answer different types of pattern matching queries (existential, counting and enumeration). We perform experiments on inputs up…

Data Structures and Algorithms · Computer Science 2016-12-07 Johannes Fischer , Florian Kurpicz , Peter Sanders

Recent advances in query optimization have shifted from traditional rule-based and cost-based techniques towards machine learning-driven approaches. Among these, reinforcement learning (RL) has attracted significant attention due to its…

Databases · Computer Science 2026-04-17 Seokwon Lee , Jaeyoung Sim , Sihyun Kim , Yuhsing Li , Yiwen Zhu , Kwanghyun Park

Integrating multiple (sub-)systems is essential to create advanced Information Systems (ISs). Difficulties mainly arise when integrating dynamic environments across the IS lifecycle. A traditional approach is a registry that provides the…

Software Engineering · Computer Science 2025-07-29 Robin D. Pesl , Jerin G. Mathew , Massimo Mecella , Marco Aiello

Rules could be an information extraction (IE) default option, compared to ML and LLMs in terms of sustainability, transferability, interpretability, and development burden. We suggest a sustainable and combined use of rules and ML as an IE…

Computation and Language · Computer Science 2025-06-17 Guillaume Bazin , Xavier Tannier , Fanny Adda , Ariel Cohen , Akram Redjdal , Emmanuelle Kempf