Results 61 to 70 of about 24,896 (183)

Safe Stabilization Using Non‐Smooth Control Lyapunov Barrier Function

International Journal of Robust and Nonlinear Control, EarlyView.
ABSTRACT This paper addresses the challenge of safe stabilization, ensuring the system state reaches the origin while avoiding unsafe state regions. Existing approaches that rely on smooth Lyapunov barrier functions often fail to guarantee a feasible controller. To overcome this limitation, we introduce the non‐smooth control Lyapunov barrier function (
Jianglin Lan, Eldert van Henten, Peter Groot Koerkamp, Congcong Sun   +3 more
wiley   +1 more source

A Cut Discontinuous Galerkin Method for Coupled Bulk-Surface Problems

, 2017
We develop a cut Discontinuous Galerkin method (cutDGM) for a diffusion-reaction equation in a bulk domain which is coupled to a corresponding equation on the boundary of the bulk domain. The bulk domain is embedded into a structured, unfitted background
Massing, Andre
core   +1 more source

A new smooth failure criterion for concrete inspired by Lubliner's condition

Structural Concrete, EarlyView.
Abstract A new failure criterion with 10 parameters is proposed, based on Lubliner's idea of joining two Drucker–Prager cones. The novelty lies in the way of introducing deviatoric shape variation: through two Podgórski's functions. This feature allows for improving plane stress cross‐section's compatibility with experimental data.
Inez Kamińska, Aleksander Szwed
wiley   +1 more source

Two-parameter nonsmooth grazing bifurcations of limit cycles: classification and open problems [PDF]

, 2005
This paper proposes a strategy for the classification of codimension-two grazing bifurcations of limit cycles in piecewise smooth systems of ordinary differential equations.
Champneys, AR, di Bernardo, M, Hogan, SJ, Homer, ME, Kowalczyk, PS, Kuznetsov, YA, Nordmark, A, Piiroinen, PT   +7 more
core   +1 more source

A Real‐Time Multi‐Scale Neural Representation for Complex Surface Reflectance

Computer Graphics Forum, EarlyView.
Abstract Recent machine learning methods have significantly advanced the state of the art in the classic problem of representing surface appearance over angle, space, and scale. The models tend, however, to be relatively heavy compared to traditional fixed‐function representations, making real‐time application challenging.
Heikki Timonen, Pauli Kemppinen, Jaakko Lehtinen   +2 more
wiley   +1 more source

Piecewise smooth systems near a co-dimension 2 discontinuity manifold: can one say what should happen?

, 2015
We consider a piecewise smooth system in the neighborhood of a co-dimension 2 discontinuity manifold $\Sigma$. Within the class of Filippov solutions, if $\Sigma$ is attractive, one should expect solution trajectories to slide on $\Sigma$.
A. Dontchev, A. F. Filippov, A. Machina, A. Polynikis, E. Plahte, J. C. Alexander, J. C. Alexander, J. Cortes, J. Llibre, J. Sotomayor, L. Dieci, L. Dieci, L. Dieci, L. Dieci, L. Dieci, L. Dieci, L. Dieci, M. di Bernardo, M. Jeffrey, N. Del Buono, N. Guglielmi, T. Seidman, T. Seidman, V. I. Utkin, V. I. Utkin, Z. Artstein   +25 more
core   +1 more source

2D Piecewise Linear Scalar Fields with Invertible Integral Lines

Computer Graphics Forum, EarlyView.
Abstract Integral lines of the gradient flow are standard features in continuously differentiable scalar fields that enjoy some useful properties: They cover the domain densely, do not split, merge, or intersect, and are therefore invertible. For widely used discretizations of scalar fields, the corresponding polygonal approximations of integral lines ...
T.L. Erxleben, M. Motejat, C. Rössl, H. Theisel   +3 more
wiley   +1 more source

Limit cycles in an $ m $-piecewise discontinuous polynomial differential system

AIMS Mathematics
<abstract><p>In this paper, I study a planar $ m $-piecewise discontinuous polynomial differential system $ \dot{x} = y, \dot{y} = -x-\varepsilon(f(x, y)+g_m(x, y)h(x)) $, which has a linear center in each zone partitioned by those switching lines, where $ f(x, y) = \sum_{i+j = 0}^na_{ij}x^iy^j $, $ h(x) = \sum_{j = 0}^lb_jx^j, a_{ij}, b_j ...
openaire   +2 more sources

Lorenz-like systems and classical dynamical equations with memory forcing: a new point of view for singling out the origin of chaos

, 2002
A novel view for the emergence of chaos in Lorenz-like systems is presented. For such purpose, the Lorenz problem is reformulated in a classical mechanical form and it turns out to be equivalent to the problem of a damped and forced one dimensional ...
A. d’Anjou, A. Mazzino, B. Saltzman, C. Raab, C.P. Unsworth, C.T. Sparrow, D. Pazó, D. Pingel, D. Vincenzi, D. Xu, E.N. Lorenz, F.C. Moon, F.C. Moon, G. Yan, H. Busch, H. Nijmeijer, I. Stewart, J.B. Gao, K. Pyragas, Lord Rayleigh, M. Clerc, R. Festa, R. Festa, S. Iplikci, S.W. Shaw, T. Matsumoto, T. Yang, W. Tucker   +27 more
core   +1 more source

Fast Injective Mesh Parameterization via Beltrami Coefficient Prolongation

Computer Graphics Forum, EarlyView.
Abstract We present a highly efficient and robust method for free boundary injective parameterization of disk‐like triangle meshes with low isometric distortion. Harmonic function–based approaches, grounded in a strong mathematical framework, are widely employed.
G. Fargion, O. Weber
wiley   +1 more source