Results 31 to 40 of about 13,053,297 (285)

Contour Detection of Mammogram Masses Using ChanVese Model and B-Spline Approximation

open access: yesInternational Journal of Interactive Multimedia and Artificial Intelligence, 2017
ChanVese model segmentation has been applied for contour detection of mass region in mammogram in our previous work. Available information of the desired object contour is used, in this paper, for B-spline approximation. The mass region boundary (contour)
Youssef Benyoussef   +2 more
doaj   +1 more source

Parametrization and penalties in spline models with an application to survival analysis [PDF]

open access: yes, 2008
A simple parametrization, built from the definition of cubic splines, is shown to facilitate the implementation and interpretation of penalized spline models, whatever configuration of knots is used.
Costa, Maria J. (Maria João)   +1 more
core   +1 more source

Introduction to Timelike Uniform B-splineCurves in Minkowski-3 Space

open access: yesJournal of Mathematical Sciences and Modelling, 2018
The intention of this article is to study on timelike uniform B-spline curves in Minkowski-3 space. In our paper, we take the control points of uniform B-spline curves as a timelike point in Minkowski-3 space.
Hatice Kuşak Samancı
doaj   +1 more source

Optimization and Modeling of a Spatial CAM Mechanism for a Two-Dimensional Plunger Electro-Hydraulic Pump

open access: yesIEEE Access, 2023
Traditional cam movements in piston pumps follow a non-stopping motion law, resulting in insufficient smoothness in plunger stroke changes. Consequently, this directly impacts the theoretical flow rate of the pump.
Xinguo Qiu   +5 more
doaj   +1 more source

A quadratic trigonometric weighted spline with local support basis functions

open access: yesAlexandria Engineering Journal, 2018
A proficient freeform curve design technique is developed by constructing B-spline like local support basis functions using a quadratic trigonometric function introduced. The built basis functions fulfill the properties of the local support, partition of
Muhammad Sarfraz   +2 more
doaj   +1 more source

The human gut microbiome across the life course

open access: yesFEBS Letters, EarlyView.
Despite significant individual variation and continuous change throughout life, the human gut microbiome follows some life stage‐specific trends. This article provides a brief overview of how gut microbiome composition shifts across different phases of life. Created in BioRender. Özkurt, E. (2026) https://BioRender.com/8q4nrnc.
Alise J. Ponsero   +4 more
wiley   +1 more source

FREE DEFORMATION OF MULTIRESOLUTION B-SPLINES CURVES

open access: yesPesquimat, 2014
When a point oí the curve is dragged to another position, a local curve segment ís affected, whose size could be determined by propagating the deformation on lower resolution of the curve in multiresolution representation.
Luis A Rivera   +2 more
doaj   +1 more source

Clinical and Modifiable Factors Associated With Disability and Relapse in MOGAD: A Multicentre Cohort Study

open access: yesAnnals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Background Factors associated with relapse course and disability in myelin oligodendrocyte glycoprotein antibody‐associated disease (MOGAD) remain incompletely understood. Objectives To identify clinical and modifiable factors associated with relapse and disability in MOGAD. Methods In this ambispective multicentre cohort study using data from
Yingtao Wang   +23 more
wiley   +1 more source

B-spline curve theory: An overview and applications in real life

open access: yesNonlinear Engineering
This study commences by delving into B-spline curves, their essential properties, and their practical implementations in the real world. It also examines the role of knot vectors, control points, and de Boor’s algorithm in creating an elegant and ...
Hasan Md. Shahid   +4 more
doaj   +1 more source

Hardware–Software Embedded System for Real-Time Trajectory Planning of Multi-Axis Machine Using B-Spline Curve Interpolation Algorithm

open access: yesMachines, 2023
This paper proposes a B-spline trajectory algorithm to realize multi-axis trajectory interpolation and analyzes the operating accuracy in an embedded system.
Qitao Tan, Mohd Ariffanan Mohd Basri
doaj   +1 more source

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