Results 51 to 60 of about 7,438 (162)

Dynamic Programming as a Method of Spline Approximation in the CAD Systems of Linear Constructions

Российский технологический журнал, 2019
Under study is a problem of the line structure routing of roads, railways and other linear constructions. Designing a trace plan and longitudinal profile are considered as non-linear programming tasks.
D. A. Karpov, V. I. Struchenkov
doaj   +1 more source

A class of methods based on non-polynomial sextic spline functions for the solution of a special fifth-order boundary-value problems

Journal of Mathematical Analysis and Applications, 2006
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Khan, Muhammad Azam, Siraj-ul-Islam, , Tirmizi, Ikram A., Twizell, E.H., Ashraf, Saadat   +4 more
openaire   +1 more source

Estimating and modelling cure in population-based cancer studies within the framework of flexible parametric survival models

BMC Medical Research Methodology, 2011
Background When the mortality among a cancer patient group returns to the same level as in the general population, that is, the patients no longer experience excess mortality, the patients still alive are considered "statistically cured". Cure models can
Eloranta Sandra, Dickman Paul W, Andersson Therese ML, Lambert Paul C   +3 more
doaj   +1 more source

The use of complex structure splines in roadway design

Российский технологический журнал
Objectives. The aim of the work is to develop the theory of spline-approximation of a sequence of points on a plane for using compound splines with a complex structure.
V. I. Struchenkov, D. A. Karpov
doaj   +1 more source

About methods of random fields statistical simulation on the sphere by the aircraft magnetometry data

Вісник Київського національного університету імені Тараса Шевченка. Серія Геологія, 2018
There have been developed universal methods of statistical simulation (Monte Carlo methods) of geophysical data for generating random fields on the sphere on grids of required detail and regularity. Most of the geophysical research results are submitted
Z. Vyzhva, V. Demidov, A. Vyzhva
doaj   +1 more source

Comparison of Parametric Rate Models for Gap Times Between Recurrent Events

Mathematics
Over the past two decades, substantial efforts have been made to develop survival models for gap times between recurrent events. An emerging approach involves considering rate models derived from a non-homogeneous Poisson process, thus allowing the ...
Ivo Sousa-Ferreira, Ana Maria Abreu, Cristina Rocha   +2 more
doaj   +1 more source

Bezier curve conjugation for smooth curve joining and corner rounding

Омский научный вестник
The authors propose an analytical method for the smooth connection of two Bezier curves of arbitrary degree using a connecting curve, which is also a Bezier curve.
O. V. Krivosheev, S. V. Mavrin, A. S. Starkova   +2 more
doaj   +1 more source

Automated Diffuser Shape Optimization based on CFD Simulations and Surrogate Modeling

Journal of Applied Fluid Mechanics, 2016
An approach for the optimization of laminar flow in diffusers is presented. The goal in our optimization process is to maximize diffuser performance and, in this way, pressure recovery by optimizing the geometry.
Mostafa Dehghani, Hossein Ajam, Said Farahat   +2 more
doaj  

3D modeling of salt domes according to detailed drilling data in the Precaspian region

Georesursy
To create three-dimensional models of arcomorph structures based on detailed data of drilling without involving genetic considerations and indirect information, the potential fields method is effective, which consists of finding an approximating three ...
V. V. Lapkovsky, B. V. Lunev, M. P. Antipov, Yu. A. Volozh, Yu. A. Pisarenko, V. V. Fomina   +5 more
doaj   +1 more source

Special B-spline Tight Framelet and It's Applications [PDF]

Journal of Advances in Mathematics and Computer Science, 2018
Mutaz Mohammad, En-Bing Lin, Amer Darweesh, Fares Howari   +3 more
openaire   +1 more source