Results 31 to 40 of about 352,001 (275)

Weibull Regression and Machine Learning Survival Models: Methodology, Comparison, and Application to Biomedical Data Related to Cardiac Surgery

open access: yesBiology, 2023
In this article, we propose a comparative study between two models that can be used by researchers for the analysis of survival data: (i) the Weibull regression model and (ii) the random survival forest (RSF) model.
Thalytta Cavalcante   +4 more
doaj   +1 more source

Binary trees, coproducts, and integrable systems [PDF]

open access: yes, 2010
We provide a unified framework for the treatment of special integrable systems which we propose to call "generalized mean field systems". Thereby previous results on integrable classical and quantum systems are generalized.
Arnol'd V I   +12 more
core   +3 more sources

XML Compression via DAGs [PDF]

open access: yes, 2013
Unranked trees can be represented using their minimal dag (directed acyclic graph). For XML this achieves high compression ratios due to their repetitive mark up. Unranked trees are often represented through first child/next sibling (fcns) encoded binary
Bousquet-Melou, Mireille   +3 more
core   +1 more source

On Succinct Representations of Binary Trees [PDF]

open access: yesMathematics in Computer Science, 2017
Journal version of part of COCOON 2012 ...
Pooya Davoodi   +2 more
openaire   +3 more sources

Representing and retrieving regions using binary partition trees [PDF]

open access: yes, 1999
This paper discusses the interest of Binary Partition Trees for image and region representation in the context of indexing and similarity based retrieval.
Casas Pla, Josep Ramon   +2 more
core   +1 more source

Combining Binary Search Trees [PDF]

open access: yes, 2013
12 pages, 2 figures, ICALP ...
Erik D. Demaine   +3 more
openaire   +6 more sources

Right-cancellability of a family of operations on binary trees [PDF]

open access: yesDiscrete Mathematics & Theoretical Computer Science, 1998
We prove some new results on a family of operations on binary trees, some of which are similar to addition, multiplication and exponentiation for natural numbers. The main result is that each operation in the family is right-cancellable.
Philippe Duchon
doaj   +1 more source

Counting smaller trees in the Tamari order [PDF]

open access: yesDiscrete Mathematics & Theoretical Computer Science, 2013
We introduce new combinatorial objects, the interval-posets, that encode intervals of the Tamari lattice. We then find a combinatorial interpretation of the bilinear form that appears in the functional equation of Tamari intervals described by Chapoton ...
Grégory Chatel, Viviane Pons
doaj   +1 more source

Two bijections on Tamari Intervals [PDF]

open access: yesDiscrete Mathematics & Theoretical Computer Science, 2014
We use a recently introduced combinatorial object, the $\textit{interval-poset}$, to describe two bijections on intervals of the Tamari lattice. Both bijections give a combinatorial proof of some previously known results.
Frédéric Chapoton   +2 more
doaj   +1 more source

Toric ideals of homogeneous phylogenetic models

open access: yes, 2004
We consider the phylogenetic tree model in which every node of the tree is observed and binary and the transitions are given by the same matrix on each edge of the tree.
Eriksson, Nicholas
core   +2 more sources

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