Results 21 to 30 of about 163,062 (337)

Computations for symbolic substitutions [PDF]

open access: yes, 2017
We provide a survey of results from symbolic dynamics and algebraic topology relating to Grout, a new user-friendly program developed to calculate combinatorial properties and topological invariants of a large class of symbolic substitutions. We study their subshifts (and related spaces) with an emphasis on examples of computations.
Balchin, Scott, Rust, Dan
openaire   +3 more sources

Constrained Consistency Modeling for Attributed Network Embedding

open access: yesIEEE Access, 2019
Network embedding has emerged as a fundamental approach to network analysis tasks. Its main purpose is to learn a suitable mapping function to convert nodes in networks into a low-dimensional representations.
Xuan Zang   +3 more
doaj   +1 more source

The OCS-SVM: An Objective-Cost-Sensitive SVM With Sample-Based Misclassification Cost Invariance

open access: yesIEEE Access, 2019
Studies on the traditional support vector machine (SVM) implicitly assume that the costs of different types of mistakes are the same and minimize the error rate.
Shuang Yu   +3 more
doaj   +1 more source

The unpolarized and polarized single-mass three-loop heavy flavor operator matrix elements A gg,Q and ∆A gg,Q

open access: yesJournal of High Energy Physics, 2022
We calculate the gluonic massive operator matrix elements in the unpolarized and polarized cases, A gg,Q (x, μ 2) and ∆A gg,Q (x, μ 2), at three-loop order for a single mass.
J. Ablinger   +7 more
doaj   +1 more source

A Novel Histogram Region Merging Based Multithreshold Segmentation Algorithm for MR Brain Images

open access: yesInternational Journal of Biomedical Imaging, 2017
Multithreshold segmentation algorithm is time-consuming, and the time complexity will increase exponentially with the increase of thresholds. In order to reduce the time complexity, a novel multithreshold segmentation algorithm is proposed in this paper.
Siyan Liu   +3 more
doaj   +1 more source

Efficient Heuristics for Structure Learning of k-Dependence Bayesian Classifier

open access: yesEntropy, 2018
The rapid growth in data makes the quest for highly scalable learners a popular one. To achieve the trade-off between structure complexity and classification accuracy, the k-dependence Bayesian classifier (KDB) allows to represent different number of ...
Yang Liu, Limin Wang, Minghui Sun
doaj   +1 more source

The Summation Package Sigma: Underlying Principles and a Rhombus Tiling Application [PDF]

open access: yesDiscrete Mathematics & Theoretical Computer Science, 2004
We give an overview of how a huge class of multisum identities can be proven and discovered with the summation package Sigma implemented in the computer algebra system Mathematica. General principles of symbolic summation are discussed. We illustrate the
Carsten Schneider
doaj   +1 more source

Stack- and Queue-like Dynamics in Recurrent Neural Networks [PDF]

open access: yes, 2005
What dynamics do simple recurrent networks (SRNs) develop to represent stack-like and queue-like memories? SRNs have been widely used as models in cognitive science.
Bennell, Julia A., Song, Xiang
core   +2 more sources

Symbolic WCET Computation [PDF]

open access: yesACM Transactions on Embedded Computing Systems, 2017
Parametric Worst-case execution time (WCET) analysis of a sequential program produces a formula that represents the worst-case execution time of the program, where parameters of the formula are user-defined parameters of the program (as loop bounds, values of inputs, or internal variables, etc).
Ballabriga, Clément   +2 more
openaire   +1 more source

Symbolic Computation of Variational Symmetries in Optimal Control [PDF]

open access: yes, 2006
We use a computer algebra system to compute, in an efficient way, optimal control variational symmetries up to a gauge term. The symmetries are then used to obtain families of Noether's first integrals, possibly in the presence of nonconservative ...
Amílcar Teixeira   +5 more
core   +6 more sources

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