Results 21 to 30 of about 1,686,514 (289)

Ellipsoidal analysis of coordination polyhedra

open access: yesNature Communications, 2017
Simple polyhedra in crystalline compounds are often deformed, so methods for analysing their distortions are useful. Here, the authors demonstrate that analysis of the minimum bounding ellipsoid of a coordination polyhedron provides a general method for ...
James Cumby, J. Paul Attfield
doaj   +1 more source

RGB-D Object SLAM Using Quadrics for Indoor Environments

open access: yesSensors, 2020
Indoor service robots need to build an object-centric semantic map to understand and execute human instructions. Conventional visual simultaneous localization and mapping (SLAM) systems build a map using geometric features such as points, lines, and ...
Ziwei Liao   +3 more
doaj   +1 more source

A Fast Algorithm for Well-Spaced Points and Approximate Delaunay Graphs [PDF]

open access: yes, 2013
We present a new algorithm that produces a well-spaced superset of points conforming to a given input set in any dimension with guaranteed optimal output size. We also provide an approximate Delaunay graph on the output points.
Miller, Gary L.   +2 more
core   +4 more sources

A Novel Approach for Ellipsoidal Outer-Approximation of the Intersection Region of Ellipses in the Plane [PDF]

open access: yes, 2017
In this paper, a novel technique for tight outer-approximation of the intersection region of a finite number of ellipses in 2-dimensional (2D) space is proposed. First, the vertices of a tight polygon that contains the convex intersection of the ellipses
A Kurzhanski   +27 more
core   +2 more sources

Dual Set Membership Filter With Minimizing Nonlinear Transformation of Ellipsoid [PDF]

open access: yesIEEE Transactions on Automatic Control, 2019
In this article, we propose a dual set membership filter for nonlinear dynamic systems with additive unknown but bounded noises, and it has three distinct advantages.
Zhiguo Wang   +4 more
semanticscholar   +1 more source

Deterministic Global Attitude Estimation [PDF]

open access: yes, 2006
A deterministic attitude estimation problem for a rigid body in an attitude dependent potential field with bounded measurement errors is studied. An attitude estimation scheme that does not use generalized coordinate representations of the attitude is ...
Lee, Taeyoung   +3 more
core   +3 more sources

Recursive set membership estimation for output–error fractional models with unknown–but–bounded errors

open access: yesInternational Journal of Applied Mathematics and Computer Science, 2016
This paper presents a new formulation for set-membership parameter estimation of fractional systems. In such a context, the error between the measured data and the output model is supposed to be unknown but bounded with a priori known bounds. The bounded
Amairi Messaoud
doaj   +1 more source

Sharpening Geometric Inequalities using Computable Symmetry Measures [PDF]

open access: yes, 2014
Many classical geometric inequalities on functionals of convex bodies depend on the dimension of the ambient space. We show that this dimension dependence may often be replaced (totally or partially) by different symmetry measures of the convex body ...
Brandenberg, René, König, Stefan
core   +1 more source

Further Results on Reachable Set Bounding for Discrete-Time System with Time-Varying Delay and Bounded Disturbance Inputs

open access: yesComplexity, 2018
This paper investigates the problem of reachable set bounding for discrete-time system with time-varying delay and bounded disturbance inputs. Together with a new Lyapunov-Krasovskii functional, discrete Wirtinger-based inequality, and reciprocally ...
Wei Kang, Hao Chen, Kaibo Shi, Jun Cheng
doaj   +1 more source

Hybrid Scene Structuring for Accelerating 3D Radiative Transfer Simulations

open access: yesRemote Sensing, 2019
Three-dimensional (3D) radiative transfer models are the most accurate remote sensing models. However, presently the application of 3D models to heterogeneous Earth scenes is a computationally intensive task.
Jianbo Qi   +3 more
doaj   +1 more source

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