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A focused crawler aims at discovering as many web pages and web sites relevant to a target topic as possible, while avoiding irrelevant ones. Reinforcement Learning (RL) has been a promising direction for optimizing focused crawling,…

Information Retrieval · Computer Science 2025-05-20 Andreas Kontogiannis , Dimitrios Kelesis , Vasilis Pollatos , George Giannakopoulos , Georgios Paliouras

Extracting relational triples (subject, predicate, object) from text enables the transformation of unstructured text data into structured knowledge. The named entity recognition (NER) and the relation extraction (RE) are two foundational…

Computation and Language · Computer Science 2023-08-23 Hongyin Zhu

Imbalanced data are commonly present in real-world applications. While data synthesis can effectively mitigate data scarcity for rare classes, and LLMs have revolutionized text generation, the application of LLMs to the synthesis of…

Our goal is to visualize an additional data dimension of a tree with multifaceted data through superimposition on vertical strips, which we call columns. Specifically, we extend upward drawings of unordered rooted trees where vertices have…

Computational Geometry · Computer Science 2023-09-06 Jonathan Klawitter , Johannes Zink

Very large volumes of spatial data increasingly become available and demand effective management. While there has been decades of research on spatial data management, few works consider the current state of commodity hardware, having…

Traditional algorithms for multiway join computation are based on rewriting the order of joins and combining results of intermediate subqueries. Recently, several approaches have been proposed for algorithms that are "worst-case optimal"…

Databases · Computer Science 2016-03-01 Oren Kalinsky , Yoav Etsion , Benny Kimelfeld

A rising research challenge is running costly machine learning (ML) networks locally on resource-constrained edge devices. ML networks with large convolutional layers can easily exceed available memory, increasing latency due to excessive…

Machine Learning · Computer Science 2023-07-20 Jackson Farley , Andreas Gerstlauer

While programmers know that the low-level memory representation of data structures can have significant effects on performance, compiler support to optimize the layout of those structures is an under-explored field. Prior work has optimized…

Programming Languages · Computer Science 2024-11-07 Vidush Singhal , Chaitanya Koparkar , Joseph Zullo , Artem Pelenitsyn , Michael Vollmer , Mike Rainey , Ryan Newton , Milind Kulkarni

We propose a tree-based algorithm for classification and regression problems in the context of functional data analysis, which allows to leverage representation learning and multiple splitting rules at the node level, reducing…

Machine Learning · Statistics 2020-11-03 Edoardo Belli , Simone Vantini

Matrix mechanisms are often used to provide unbiased differentially private query answers when publishing statistics or creating synthetic data. Recent work has developed matrix mechanisms, such as ResidualPlanner and Weighted Fourier…

Databases · Computer Science 2026-04-02 Guanlin He , Yingtai Xiao , Jiamu Bai , Xin Gu , Zeyu Ding , Wenpeng Yin , Daniel Kifer

Reinforcement learning (RL) has become an effective approach for fine-tuning large language models (LLMs), particularly to enhance their reasoning capabilities. However, RL fine-tuning remains highly resource-intensive, and existing work…

Machine Learning · Computer Science 2026-02-17 Yifan Sun , Jingyan Shen , Yibin Wang , Tianyu Chen , Zhendong Wang , Mingyuan Zhou , Huan Zhang

Test-Time Scaling (TTS) enhances the reasoning capabilities of large language models by allocating additional inference compute to explore the solution space. However, existing parallel TTS methods typically keep branches isolated during…

Computation and Language · Computer Science 2026-05-27 Xinglin Wang , Hao Lin , Shaoxiong Feng , Peiwen Yuan , Yiwei Li , Jiayi Shi , Yueqi Zhang , Chuyi Tan , Ji Zhang , Boyuan Pan , Yao Hu , Kan Li

Purpose: The query language GraphQL has gained significant traction in recent years. In particular, it has recently gained the attention of the semantic web and graph database communities and is now often used as a means to query knowledge…

Databases · Computer Science 2024-09-20 Nikolaos Karalis , Alexander Bigerl , Axel-Cyrille Ngonga Ngomo

This study proposes the "adaptive flip graph algorithm", which combines adaptive searches with the flip graph algorithm for finding fast and efficient methods for matrix multiplication. The adaptive flip graph algorithm addresses the…

Symbolic Computation · Computer Science 2024-03-19 Yamato Arai , Yuma Ichikawa , Koji Hukushima

Retrieval-Augmented Generation (RAG) systems commonly adopt retrieval fusion techniques such as multi-query retrieval and reciprocal rank fusion (RRF) to increase document recall, under the assumption that higher recall leads to better…

Information Retrieval · Computer Science 2026-03-03 Luigi Medrano , Arush Verma , Mukul Chhabra

We propose Range-based Ternary Search Tree (RTST), a tree-based approach for flow-table lookup in SDN network. RTST builds upon flow-tables in SDN switches to provide a fast lookup among flows. We present a parallel multi-pipeline…

Networking and Internet Architecture · Computer Science 2018-01-04 Rashid Hatamia , Hossein Bahramgiria , Ahmad Khonsari

In this paper, we present a fast implementation of the Singular Value Thresholding (SVT) algorithm for matrix completion. A rank-revealing randomized singular value decomposition (R3SVD) algorithm is used to adaptively carry out partial…

Numerical Analysis · Computer Science 2017-04-20 Yaohang Li , Wenjian Yu

The initial data for black hole collisions is constructed using a conformal-imaging approach and a new adaptive mesh refinement technique, a fully threaded tree (FTT). We developed a second-order accurate approach to the solution of the…

General Relativity and Quantum Cosmology · Physics 2009-10-31 Peter Diener , Nina Jansen , Alexei Khokhlov , Igor Novikov

We present a system called Dist-$\mu$-RA for the distributed evaluation of recursive graph queries. Dist-$\mu$-RA builds on the recursive relational algebra and extends it with evaluation plans suited for the distributed setting. The goal…

Databases · Computer Science 2025-04-01 Sarah Chlyah , Pierre Genevès , Nabil Layaïda

This document defines extensions of the RDF data model and of the SPARQL query language that capture an alternative approach to represent statement-level metadata. While this alternative approach is backwards compatible with RDF reification…

Databases · Computer Science 2021-12-17 Olaf Hartig , Bryan Thompson