Results 51 to 60 of about 159,843 (190)

Experimental validation of quantum steering ellipsoids and tests of volume monogamy relations

open access: yes, 2019
The set of all qubit states that can be steered to by measurements on a correlated qubit is predicted to form an ellipsoid---called the quantum steering ellipsoid---in the Bloch ball.
Cheng, Shuming   +10 more
core   +1 more source

Lightweight Implicit Approximation of the Minkowski Sum of an N-Dimensional Ellipsoid and Hyperrectangle

open access: yesMathematics
This work considers the Minkowski sum of an N-dimensional ellipsoid and hyperrectangle, a combination that is extremely relevant due to the usage of ellipsoid-adjacent primitives in computer graphics for work such as 3D Gaussian splatting.
Martijn Courteaux   +3 more
doaj   +1 more source

Characteristics of central visual field defect after macular hole surgery [PDF]

open access: yesInternational Journal of Ophthalmology, 2019
AIM: To investigate the characteristics of postoperative central visual field defect (cVFD) in patients with macular hole (MH). METHODS: Eighteen eyes from 18 MH patients were involved in this retrospective study which reviewed square root of loss ...
Jia-Nan Li   +3 more
doaj   +1 more source

Comparison of the ellipsoid and simplex methods

open access: yesLietuvos Matematikos Rinkinys, 1999
The ellipsoid method is presented. The least squers functional of the basic solution linear constrains is used as ellipsoid. The Klee-Minty linear programming problem is used to compare the ellipsoid and simplex methods.
Eligijus Laurinavičius   +1 more
doaj   +3 more sources

Approximate dynamics of dark matter ellipsoids

open access: yes, 2005
The collapse of non-collisional dark matter and the formation of pancake structures in the Universe are investigated approximately. Collapse is described by a system of ordinary differential equations, in the model of a uniformly rotating, three-axis ...
Bisnovatyi-Kogan, G. S., Tsupko, O. Yu.
core   +2 more sources

Spectral element simulations of flow past an ellipsoid at different Reynolds numbers

open access: yesElectronic Journal of Differential Equations, 2009
A new method is developed to simulate the fully coupled motion involving an ellipsoidal particle and the ambient fluid. This method essentially reduces a two-phase flow problem into a single-phase fluid flow problem.
Don Liu   +2 more
doaj  

Collision Avoidance Problem of Ellipsoid Motion

open access: yesMathematics, 2022
This paper studies the problem of target control and how a virtual ellipsoid can avoid the static obstacle. During the motion to the target set, the virtual ellipsoid can achieve a motion under collision avoidance by keeping the distance between the ...
Shujun Guo   +9 more
doaj   +1 more source

The easiest way to Heaviside ellipsoid

open access: yes, 2001
The formula for the electric field of a point charge moving with constant velocity is derived using the symmetry properties of Maxwell's equations - its Lorentz invariance.
Dmitriyev, Valery P.
core   +1 more source

Discussion of the effects of selecting incorrect ellipsoid parameters

open access: yesGeodesy and Cartography, 2012
GNSS positioning has become an integral part of many functions within society. Conveniently, the World Geodetic System 1984 (WGS84) ellipsoid is associated with GNSS surveying since its definition has been developed over the years based on concerted ...
George Preiss, Vilma Zubinaite
doaj   +1 more source

Non-existence of an invariant measure for a homogeneous ellipsoid rolling on the plane

open access: yes, 2013
It is known that the reduced equations for an axially symmetric homogeneous ellipsoid that rolls without slipping on the plane possess a smooth invariant measure. We show that such an invariant measure does not exist in the case when all of the semi-axes
García-Naranjo, Luis C.   +1 more
core   +1 more source

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