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Mostrando ítems 21-30 de 460
Tangent to a surface
(Wolfram Demonstration Project, 2011)
Linhas de curvatura em superfícies algébricas do espaço euclidiano de dimensão três
(Pós-Graduação em MatemáticaUFS, 2019)
Numerical prediction of three-dimensional time-dependent viscoelastic extrudate swell using differential and algebraic models
(PERGAMON-ELSEVIER SCIENCE LTD, 2011)
This study investigates the numerical simulation of three-dimensional time-dependent viscoelastic free surface flows using the Upper-Convected Maxwell (UCM) constitutive equation and an algebraic explicit model. This ...
Improvement of linear algebra controllers using sliding surface concepts: Applications to chemical processes
(Institute of Electrical and Electronics Engineers, 2021-08)
This work presents a novel control technique that combines concepts of Sliding Surface with a Linear Algebra methodology for controller design. The result is a controller with an improved robustness, while the chattering ...
Teorema de Riemann-Roch e aplicações
(Universidade Estadual Paulista (Unesp), 2011-02-25)
O objetivo principal deste trabalho é estudar o Teorema de Riemann-Roch, um dos resultados fundamentais na teoria de curvas algébricas, e apresentar algumas de suas aplicações. Este teorema é uma importante ferramenta para ...
Integrability and Dynamics of Quadratic Three-Dimensional Differential Systems Having an Invariant Paraboloid
(2016-07-01)
Invariant algebraic surfaces are commonly observed in differential systems arising in mathematical modeling of natural phenomena. In this paper, we study the integrability and dynamics of quadratic polynomial differential ...
Arrangements of curves and algebraic surfaces
(2008)
A variety is an integral separated scheme of finite type over C. We call it a curve (a surface) if its dimension is one (two). A projective variety is a variety which has a closed embedding into Pn for fome pisitive integer n.
Trajectory tracking of underactuated surface vessels: a linear algebra approach
(Institute of Electrical and Electronics Engineers, 2013-07)
This brief presents the design of a controller that allows an underactuated vessel to track a reference trajectory in the x−y plane. A trajectory tracking controller designed originally for robotic systems is applied for ...
Arrangements of rational sections over curves and the varieties they define
(EUROPEAN MATHEMATICAL SOC, 2011)
We introduce arrangements of rational sections over curves. They generalize line arrangements on P-2. Each arrangement of d sections defines a single curve in Pd-2 through the Kapranov's construction of (M) over bar (0,d+1). ...