Results 141 to 150 of about 36,511 (307)
Cubic spline population density functions and subcentre delimitation. The case of Barcelona [PDF]
The presence of subcentres cannot be captured by an exponential function. Cubic spline functions seem more appropriate to depict the polycentricity pattern of modern urban systems.
Anna Galindo +2 more
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Med Research, EarlyView.This study examined the relative contributions of modifiable risk factors to cardiovascular diseases in adults with hypertension. More favorable risk factor profiles were consistently associated with lower risks across all outcomes. Beyond blood pressure, nicotine exposure showed comparatively larger population attributable fractions.
Shengtao Wei +10 more
wiley +1 more source
, 1986 This article describes and presents examples of some techniques for the representation and interactive design of surfaces based on a parametric surface representation that uses v-spline curves.
G. Nielson
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Mathematical Methods in the Applied Sciences, EarlyView.A highly accurate numerical method is given for the solution of boundary value problem of generalized Bagley‐Torvik (BgT) equation with Caputo derivative of order 0<β<2$$ 0<\beta <2 $$ by using the collocation‐shooting method (C‐SM). The collocation solution is constructed in the space Sm+1(1)$$ {S}_{m+1}^{(1)} $$ as piecewise polynomials of degree at ...
Suzan Cival Buranay +2 more
wiley +1 more source
Magnetic Resonance in Medicine, EarlyView.ABSTRACT Purpose Magnetic resonance spectroscopy techniques are widely used to non‐invasively study brain metabolism. Despite advances in magnetic resonance spectroscopic imaging (MRSI), there is a notable absence of research on comparing fast non‐Cartesian MRSI with single‐voxel spectroscopy (SVS), limiting our understanding of its performance and ...
Young Woo Park +3 more
wiley +1 more source
Data Fitting with Cubic A-Splines
, 1994 We present algorithms for constructing iso-contours from image data or tting scattered point data C 1, C 2 or C 3 piecewise smooth chains of single sheeted real cubic algebraic curve segments called cubic A-splines (short for cubic algebraic splines ...
Chandrajit L. Bajaj, Guoliang Xu
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A Simple, Dynamic Geometric Phantom for MRI and CT Reconstruction Pipelines: Beyond Shepp–Logan
Magnetic Resonance in Medicine, EarlyView.ABSTRACT A customizable, dynamic geometric phantom was developed to bridge the gap between simplistic static phantoms and highly realistic, complex 4D solutions. The phantom enables initial testing, helps detect implementation errors, and supports quantitative evaluation of new dynamic acquisition and reconstruction methods.
Tamás Hakkel +4 more
wiley +1 more source
Modeling Biocemented Sands: Hypoplastic Model for MICP‐Based Ground Improvement
International Journal for Numerical and Analytical Methods in Geomechanics, EarlyView.ABSTRACT Bio‐cementation offers a sustainable and low‐carbon alternative to conventional ground improvement methods, aligning with the growing demand for green geotechnical solutions. To enable reliable numerical simulation of bio‐cemented soil behavior in engineering applications, advanced constitutive models are required to account for the effects of
Merita Tafili +3 more
wiley +1 more source
Oikos, EarlyView.Understanding how different drivers of global change interact to shape ecological processes remains a major challenge in ecology. Climate change is reshuffling the interactions that structure communities, with major implications for biological invasions.
Mariana C. Chiuffo +4 more
wiley +1 more source
Approximation of random processes by cubic splines
, 2008 Approximation of some classes of random processes by cubic splines with given accuracy and reliability is considered. Estimations of deviation of approximating spline from original process are obtained.
Kamenschykova, O.
core +2 more sources