scholarly journals Transverse Approach to Geometric Algebra Models for Manipulating Quadratic Surfaces

2019 ◽  
pp. 523-534
Author(s):  
Stéphane Breuils ◽  
Vincent Nozick ◽  
Laurent Fuchs ◽  
Akihiro Sugimoto
Keyword(s):  
Geometric Algebra ◽  
Quadratic Surfaces

Interactive Segmentation of Scanned Mechanical Models Based on Quadratic Surfaces Fitting

2019 ◽  
Vol 31 (7) ◽  
pp. 1210
Author(s):  
Zhongqi Wu ◽  
Jianwei Guo ◽  
Jun Xiao ◽  
Xiangyong Zeng ◽  
Ying Wang ◽  
...  
Keyword(s):  
Interactive Segmentation ◽  
Mechanical Models ◽  
Quadratic Surfaces

scholarly journals Geometric Algebra Framework Applied to Symmetrical Balanced Three-Phase Systems for Sinusoidal and Non-Sinusoidal Voltage Supply

Mathematics ◽  
2021 ◽  
Vol 9 (11) ◽  
pp. 1259
Author(s):  
Francisco G. Montoya ◽  
Raúl Baños ◽  
Alfredo Alcayde ◽  
Francisco Manuel Arrabal-Campos ◽  
Javier Roldán Roldán Pérez
Keyword(s):  
Geometric Algebra ◽  
Dimensional Euclidean Space ◽  
Active Components ◽  
Electrical Circuits ◽  
Current Harmonics ◽  
Operation Conditions ◽  
Multiple Phase ◽  
Three Phase ◽  
Phase Systems ◽  
Definition Of

This paper presents a new framework based on geometric algebra (GA) to solve and analyse three-phase balanced electrical circuits under sinusoidal and non-sinusoidal conditions. The proposed approach is an exploratory application of the geometric algebra power theory (GAPoT) to multiple-phase systems. A definition of geometric apparent power for three-phase systems, that complies with the energy conservation principle, is also introduced. Power calculations are performed in a multi-dimensional Euclidean space where cross effects between voltage and current harmonics are taken into consideration. By using the proposed framework, the current can be easily geometrically decomposed into active- and non-active components for current compensation purposes. The paper includes detailed examples in which electrical circuits are solved and the results are analysed. This work is a first step towards a more advanced polyphase proposal that can be applied to systems under real operation conditions, where unbalance and asymmetry is considered.

scholarly journals Invariants of Space Line Element Structure Based on Projective Geometric Algebra

IEEE Access ◽  
2020 ◽  
Vol 8 ◽  
pp. 62610-62618 ◽  
Author(s):  
Zhang Youzheng ◽  
Mui Yanping
Keyword(s):  
Geometric Algebra ◽  
Line Element ◽  
Space Line

scholarly journals GAPPCO: An Easy to Configure Geometric Algebra Coprocessor Based on GAPP Programs

2017 ◽  
Vol 27 (3) ◽  
pp. 2115-2132 ◽  
Author(s):  
D. Hildenbrand ◽  
S. Franchini ◽  
A. Gentile ◽  
G. Vassallo ◽  
S. Vitabile
Keyword(s):  
Geometric Algebra

scholarly journals On Restriction Estimates for Discrete Quadratic Surfaces

2018 ◽  
Vol 2019 (23) ◽  
pp. 7139-7159 ◽  
Author(s):  
Kevin Henriot ◽  
Kevin Hughes
Keyword(s):  
Quadratic Form ◽  
Integer Matrix ◽  
Discrete Surfaces ◽  
Indefinite Quadratic Form ◽  
Indefinite Quadratic ◽  
Quadratic Surfaces

Abstract We obtain truncated restriction estimates of an unexpected form for discrete surfaces $$\begin{align*}S_N = \{\, ( n_1 , \dots , n_d , R( n_1 , \dots, n_d ) ) \,,\, n_i \in [-N,N] \cap {\mathbb{Z}} \,\},\end{align*}$$ where $R$ is an indefinite quadratic form with integer matrix.

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