Results 21 to 30 of about 352 (177)
DOA Estimation of Cylindrical Conformal Array Based on Geometric Algebra
International Journal of Antennas and Propagation, 2016 Due to the variable curvature of the conformal carrier, the pattern of each element has a different direction. The traditional method of analyzing the conformal array is to use the Euler rotation angle and its matrix representation.
Minjie Wu +3 more
doaj +1 more source
Conical spaces, modular invariance and c p,1 holography
Journal of High Energy Physics, 2021 We propose a non-unitary example of holography for the family of two-dimensional logarithmic conformal field theories with negative central charge c = c p,1 = −6p + 13 − 6p −1.
Joris Raeymaekers
doaj +1 more source
Robot Object Manipulation Using Stereoscopic Vision and Conformal Geometric Algebra
Applied Bionics and Biomechanics, 2011 This paper uses geometric algebra to formulate, in a single framework, the kinematics of a three finger robotic hand, a binocular robotic head, and the interactions between 3D objects, all of which are seen in stereo images.
Julio Zamora-Esquivel +1 more
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Multimodal Medical Image Registration Based on Feature Spheres in Geometric Algebra
IEEE Access, 2018 Multi-modal image registration in medical image analysis is very challenging as the appearance of body structures in images from different imaging devices can be very different. In this paper, we propose a new method [GA-speeded up robust features (SURF)]
Wenming Cao +4 more
doaj +1 more source
LAPLACE EQUATIONS, CONFORMAL SUPERINTEGRABILITY AND BÔCHER CONTRACTIONS
Acta Polytechnica, 2016 Quantum superintegrable systems are solvable eigenvalue problems. Their solvability is due to symmetry, but the symmetry is often ``hidden''.The symmetry generators of 2nd order superintegrable systems in 2 dimensions close under commutation to define ...
Ernest G. Kalnins +2 more
doaj +1 more source
Pose Estimation of Non-Cooperative Space Targets Based on Cross-Source Point Cloud Fusion
Remote Sensing, 2021 On-orbit space technology is used for tasks such as the relative navigation of non-cooperative targets, rendezvous and docking, on-orbit assembly, and space debris removal.
Jie Li, Yiqi Zhuang, Qi Peng, Liang Zhao
doaj +1 more source
Beyond the Non‐Hermitian Skin Effect: Scaling‐Controlled Topology from Exceptional‐Bound Bands
Advanced Science, EarlyView.ABSTRACT We establish a novel mechanism for topological transitions in non‐Hermitian systems that are controlled by the system size. Based on a new paradigm known as exceptional‐bound (EB) band engineering, its mechanism hinges on the unique critical scaling behavior near an exceptional point, totally unrelated to the well‐known non‐Hermitian skin ...
Mengjie Yang, Ching Hua Lee
wiley +1 more source
Advanced Electronic Materials, EarlyView.A fully coupled FEM–HH model shows that ideally capacitive microelectrodes can achieve lower charge‐density thresholds than Faradaic contacts under current‐controlled stimulation. The advantage stems from the dynamics of surface current density on capacitive interfaces, which redirects current beneath adherent neurons.
Aleksandar Opančar +2 more
wiley +1 more source
Revisiting the Hansen Problem: A Geometric Algebra Approach
MathematicsThe Hansen problem is a classic and well-known geometric challenge in geodesy and surveying involving the determination of two unknown points relative to two known reference locations using angular measurements.
Jorge Ventura +5 more
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Local Control of (4,5,7,8-10)-Filtration Snake Robot via CGA
Mendel, 2017 We describe the local control of a (6{8){link snake like robot endowed with omnidirectional wheels on two links (head and tail). All calculations including the position, direct kinematics, di erential kinematics and inverse kinematics are described in ...
Jaroslav Hrdina +3 more
doaj +1 more source