Results 51 to 60 of about 10,152,062 (308)

On the number of matchings of a tree

open access: yesEuropean Journal of Combinatorics, 2007
The author obtains explicit expressions for the average number of \(k\)-matchings and the average number of maximal matchings of size \(k\) in rooted ordered trees, labelled trees, and \(s\)-ary trees with \(n\) vertices; and he derives asymptotic expressions for the average total number of maximum matchings in rooted ordered trees, labelled trees, and
openaire   +1 more source

Fractional matching preclusion for generalized augmented cubes [PDF]

open access: yesDiscrete Mathematics & Theoretical Computer Science, 2019
The \emph{matching preclusion number} of a graph is the minimum number of edges whose deletion results in a graph that has neither perfect matchings nor almost perfect matchings.
Tianlong Ma   +3 more
doaj   +1 more source

Estimating the number of principal components via Split-Half Eigenvector Matching (SHEM)

open access: yesMethodsX, 2023
Estimating the number of principal components to retain for dimension reduction is a critical step in many applications of principal component analysis. Common methods may not be optimal, however.
Thomas E. Gladwin
doaj   +1 more source

Bridging the Loneliness Gap: Depression, Connectivity, and Isolation in Pediatric Oncology Patients and Their Peers

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Background Loneliness is associated with adverse physical and mental health outcomes and remains understudied in children and adolescents undergoing cancer therapy. Pediatric oncology patients may be at increased risk due to medical isolation and disruption of social networks.
Charlotte N. Stahlfeld   +5 more
wiley   +1 more source

Clique descriptor of affine invariant regions for robust wide baseline image matching [PDF]

open access: yes, 2010
Assuming that the image distortion between corresponding regions of a stereo pair of images with wide baseline can be approximated as an affine transformation if the regions are reasonably small, recent image matching algorithms have focused on affine ...
Tjahjadi, Tardi, Shin, Dongjoe
core   +1 more source

The eccentric harmonic index of trees

open access: yesAKCE International Journal of Graphs and Combinatorics
Topological indices play an important role in mathematical chemistry, particularly in studies of quantitative structure property and quantitative structure activity relationships.
Yueping Su, Lieying Liao, Shaoqiang Liu
doaj   +1 more source

The analysis of the co-authorship graph of Iranian researchers in mathematics by graph parameters [PDF]

open access: yesپژوهشنامه علم سنجی, 2020
Purpose: The objective of this research is to study and compare the co-authorship graphs (networks) of Iranian researchers in the main fields of mathematics by using records, extracted from WOS and Google Scholar, and graph parameters.
Farzad Shaveisi, Mostafa Amini
doaj   +1 more source

Early Body Mass Index z‐Score Change and Resolution of Severe Malnutrition in Children With Sickle Cell Anemia in a Low‐Income Setting: A Prospective Single‐Arm Extension Study

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Background Children with sickle cell anemia (SCA) in low‐income settings are at risk of severe malnutrition, but optimal nutritional management has not been established. We evaluated an intensified ready‐to‐use therapeutic food (RUTF) regimen in children with persistent severe malnutrition after initial treatment and assessed whether early ...
Safiya Gambo   +9 more
wiley   +1 more source

Impact of Radiation Therapy on Physical and Psychosocial Health of Adolescents and Young Adults: A Joint Report From the Children's Oncology Group AYA and Radiation Oncology Committees

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Rates of cancer among adolescents and young adults (AYA), age 15–39 years, are increasing. Consequently, radiation oncologists are treating more AYAs who have diagnoses spanning both pediatric and adult practices. Compared to pediatric and older adult patients, AYAs face a unique set of challenges.
Hesham Elhalawani   +7 more
wiley   +1 more source

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