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Quite recently, the algorithmic community has focused on solving multiple shortest-path query problems beyond simple vertex-to-vertex queries, especially in the context of road networks. Unfortunately, this research cannot be generalized…

数据结构与算法 · 计算机科学 2015-07-13 Alexandros Efentakis , Dieter Pfoser

We consider the parameterized version of the maximum internal spanning tree problem, which, given an $n$-vertex graph and a parameter $k$, asks for a spanning tree with at least $k$ internal vertices. Fomin et al. [J. Comput. System Sci.,…

数据结构与算法 · 计算机科学 2014-12-30 Wenjun Li , Jianxin Wang , Jianer Chen , Yixin Cao

In this paper we propose an efficient solution for the problem of generating k-labeling forest VNS. This problem is an extension of the Minimum Spanning Tree Problem Labelling problem with important applications in telecommunications…

离散数学 · 计算机科学 2015-03-05 Sergio Consoli , Nenad Mladenovìc , Josè A. Moreno-Pèrez

Vehicular Ad Hoc Networks (VANETs) are a cornerstone of intelligent transportation systems, facilitating real-time communication between vehicles and infrastructure. However, the dynamic nature of VANETs introduces significant challenges in…

网络与互联网体系结构 · 计算机科学 2025-03-18 Zhang Zhiou , Guo Weian , Zhang Qin , Lin Haibin , Li Dongyang

Neural Information Retrieval (NIR) has significantly improved upon heuristic-based Information Retrieval (IR) systems. Yet, failures remain frequent, the models used often being unable to retrieve documents relevant to the user's query. We…

Graphs are fundamental data structures and have been employed for centuries to model real-world systems and phenomena. Random walk with restart (RWR) provides a good proximity score between two nodes in a graph, and it has been successfully…

数据库 · 计算机科学 2012-02-01 Yasuhiro Fujiwara , Makoto Nakatsuji , Makoto Onizuka , Masaru Kitsuregawa

Querying the shortest path between two vertexes is a fundamental operation in a variety of applications, which has been extensively studied over static road networks. However, in reality, the travel costs of road segments evolve over time,…

数据库 · 计算机科学 2023-03-08 Zengyang Gong , Yuxiang Zeng , Lei Chen

This paper investigates the optimal signal detection problem with a particular interest in large-scale multiple-input multiple-output (MIMO) systems. The problem is NP-hard and can be solved optimally by searching the shortest path on the…

机器学习 · 计算机科学 2022-03-22 Le He , Ke He , Lisheng Fan , Xianfu Lei , Arumugam Nallanathan , George K. Karagiannidis

For any fixed measure $H$ that maps graphs to real numbers, the MinH problem is defined as follows: given a graph $G$, an integer $k$, and a target $\tau$, is there a set $S$ of $k$ vertices that can be deleted, so that $H(G - S)$ is at…

数据结构与算法 · 计算机科学 2019-10-01 Serge Gaspers , Joshua Lau

Hierarchical classification is supervised multi-class classification problem over the set of class labels organized according to a hierarchy. In this report, we study the work by Ramaswamy et. al. on hierarchical classification over…

机器学习 · 计算机科学 2018-02-21 Dheeraj Mekala , Vivek Gupta , Purushottam Kar , Harish Karnick

Packet classification according to multi-field ruleset is a key component for many network applications. Emerging software defined networking and cloud computing need to update the rulesets frequently for flexible policy configuration.…

网络与互联网体系结构 · 计算机科学 2019-09-17 Tong Shen , Gaogang Xie , Xin Wang , Zhenyu Li , Xinyi Zhang , Penghao Zhang , Dafang Zhang

Wavelet trees are widely used in the representation of sequences, permutations, text collections, binary relations, discrete points, and other succinct data structures. We show, however, that this still falls short of exploiting all of the…

数据结构与算法 · 计算机科学 2010-11-23 Travis Gagie , Gonzalo Navarro , Simon J. Puglisi

We present a general method for converting any family of unsatisfiable CNF formulas that is hard for one of the simplest proof systems, tree resolution, into formulas that require large rank in any proof system that manipulates polynomials…

计算复杂性 · 计算机科学 2009-12-04 Paul Beame , Trinh Huynh , Toniann Pitassi

Priority queues are fundamental data structures with widespread applications in various domains, including graph algorithms and network simulations. Their performance critically impacts the overall efficiency of these algorithms.…

数据结构与算法 · 计算机科学 2023-11-27 Kiarash Parvizi

Hypertree decompositions of hypergraphs are a generalization of tree decompositions of graphs. The corresponding hypertree-width is a measure for the cyclicity and therefore tractability of the encoded computation problem. Many NP-hard…

数据结构与算法 · 计算机科学 2008-10-12 Georg Gottlob , Marko Samer

The rise of machine learning methods on heavily resource constrained devices requires not only the choice of a suitable model architecture for the target platform, but also the optimization of the chosen model with regard to execution time…

机器学习 · 计算机科学 2024-06-19 Lena Schmid , Daniel Biebert , Christian Hakert , Kuan-Hsun Chen , Michel Lang , Markus Pauly , Jian-Jia Chen

Multi-hop question answering is a knowledge-intensive complex problem. Large Language Models (LLMs) use their Chain of Thoughts (CoT) capability to reason complex problems step by step, and retrieval-augmentation can effectively alleviate…

计算与语言 · 计算机科学 2024-04-24 Li Jiapeng , Liu Runze , Li Yabo , Zhou Tong , Li Mingling , Chen Xiang

Although advancements in deep learning have significantly enhanced the recommendation accuracy of deep recommendation models, these methods still suffer from low recommendation efficiency. Recently proposed tree-based deep recommendation…

信息检索 · 计算机科学 2026-01-29 Ze Liu , Jin Zhang , Chao Feng , Defu Lian , Jie Wang , Enhong Chen

Given a graph $G=(V,E)$ with non-negative real edge lengths and an integer parameter $k$, the Min-Max k-Tree Cover problem seeks to find a set of at most $k$ subtrees of $G$, such that the union of the trees is the vertex set $V$. The…

数据结构与算法 · 计算机科学 2019-12-13 Syamantak Das , Lavina Jain , Nikhil Kumar

The k-forest problem is a common generalization of both the k-MST and the dense-$k$-subgraph problems. Formally, given a metric space on $n$ vertices $V$, with $m$ demand pairs $\subseteq V \times V$ and a ``target'' $k\le m$, the goal is…

数据结构与算法 · 计算机科学 2007-07-05 Anupam Gupta , MohammadTaghi Hajiaghayi , Viswanath Nagarajan , R. Ravi