Results 21 to 30 of about 1,424,485 (296)

Cycle analysis of Directed Acyclic Graphs

open access: yesPhysica A: Statistical Mechanics and its Applications, 2022
In this paper, we employ the decomposition of a directed network as an undirected graph plus its associated node metadata to characterise the cyclic structure found in directed networks by finding a Minimal Cycle Basis of the undirected graph and augment its components with direction information. We show that only four classes of directed cycles exist,
Vasiliauskaite, Vaiva   +2 more
openaire   +5 more sources

Nero: A Deterministic Leaderless Consensus Algorithm for DAG-Based Cryptocurrencies

open access: yesAlgorithms, 2023
This paper presents the research undertaken with the goal of designing a consensus algorithm for cryptocurrencies with less latency than the current state-of-the-art while maintaining a level of throughput and scalability sufficient for real-world ...
Rui Morais   +2 more
doaj   +1 more source

Treemaps for Directed Acyclic Graphs [PDF]

open access: yes, 2008
Gene Ontology information related to the biological role of genes is organized in a hierarchical manner that can be represented by a directed acyclic graph (DAG). Treemaps graphically represent hierarchical information via a two-dimensional rectangular map. They efficiently display large trees in limited screen space.
Vassilis Tsiaras   +2 more
openaire   +1 more source

Directed graph iterated function systems [PDF]

open access: yes, 2011
This thesis concerns an active research area within fractal geometry. In the first part, in Chapters 2 and 3, for directed graph iterated function systems (IFSs) defined on ℝ, we prove that a class of 2-vertex directed graph IFSs have attractors that ...
Boore, Graeme C.
core   +2 more sources

A Comprehensive Review of Evolutionary Algorithms for Multiprocessor DAG Scheduling

open access: yesComputation, 2020
The multiprocessor task scheduling problem has received considerable attention over the last three decades. In this context, a wide range of studies focuses on the design of evolutionary algorithms.
Eduardo C. da Silva, Paulo H. R. Gabriel
doaj   +1 more source

Learning linear non-Gaussian graphical models with multidirected edges

open access: yesJournal of Causal Inference, 2021
In this article, we propose a new method to learn the underlying acyclic mixed graph of a linear non-Gaussian structural equation model with given observational data.
Liu Yiheng, Robeva Elina, Wang Huanqing
doaj   +1 more source

The Reduction of Directed Cyclic Graph for Task Assignment Problem

open access: yesMATEC Web of Conferences, 2018
In this paper, a directed cyclic graph (DCG) is proposed as the task graph. It is undesirable and impossible to complete the task according to the constraints if the cycle exists.
Ariffin W.N.M.
doaj   +1 more source

The Algebra of Directed Acyclic Graphs [PDF]

open access: yes, 2013
We give an algebraic presentation of directed acyclic graph structure, introducing a symmetric monoidal equational theory whose free PROP we characterise as that of finite abstract dags with input/output interfaces. Our development provides an initial-algebra semantics for dag structure.
Marcelo P. Fiore, Marco Devesas Campos
openaire   +3 more sources

Covering Pairs in Directed Acyclic Graphs [PDF]

open access: yesThe Computer Journal, 2014
The Minimum Path Cover (MinPC) problem on directed acyclic graphs (DAGs) is a classical problem in graph theory that provides a clear and simple mathematical formulation for several applications in computational biology. In this paper, we study the computational complexity of three constrained variants of MinPC motivated by the recent introduction of ...
Beerenwinkel, N   +4 more
openaire   +7 more sources

Fault diagnosis of rotating machines for rail vehicles based on local mean decomposition—energy moment—directed acyclic graph support vector machine

open access: yesAdvances in Mechanical Engineering, 2016
In order to accurately perform fault diagnosis of key rotating machines of rail vehicles, a new method for diagnosis was proposed, based on local mean decomposition—energy moment—directed acyclic graph support vector machine.
Yanping Du   +4 more
doaj   +1 more source

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