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Showing 1-25 of 7,342 resultsfor "Index Terms":Positive Group
"Index Terms":Positive Group
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An Algorithm to Compute Averages on Matrix Lie Groups
Averaging is a common way to alleviate errors and random fluctuations in measurements and to smooth out data. Averaging also provides a way to merge structured data in a smooth manner. The present paper describes an algorithm to compute averages on matrix Lie groups. In particular, we discuss the case of averaging over the special orthogonal group of matrices, the unitary group of matrices and the...Show More
Approximation schemes for functions of positive-definite matrix values
In recent years, there has been an enormous interest in developing methods for the approximation of manifold-valued functions. In this paper, we focus on the manifold of symmetric positive-definite (SPD) matrices. We investigate the use of SPD-matrix means to adapt linear positive approximation methods to SPD-matrix-valued functions. Specifically, we adapt corner-cutting subdivision schemes and Be...Show More
A power divider with positive and negative group delay characteristics
2016 URSI Asia-Pacific Radio Science Conference (URSI AP-RASC)
Year: 2016 | Conference Paper |
Cited by: Papers (4)
In this paper, a power divider is suggested for predefined positive and negative group delay characteristics. The positive group delay (PGD) is obtained in between transmission paths 2 and 1, whereas the negative group delay (NGD) is in between transmission paths 3 and 1. The PGD and NGD are controlled by characteristic impedance of horizontal transmission line Z1 and shunt resistor R. Perfect inp...Show More
This paper presents a design of arbitrarily terminated coupler with tunable negative group delay (NGD) response and power division ratio. The proposed coupler provides tunable NGD through port 3 and 1 whereas positive group delay (PGD) through port 2 and 1. The analytical analysis shows that the power division ratio and NGD are controlled by a junction resistance of parasitic compensated PIN diode...Show More
Analysis of key points on effective collaborative learning groups
2011 International Conference on Computer Science and Service System (CSSS)
Year: 2011 | Conference Paper |
Cited by: Papers (1)
The purpose of this research is to examine the analysis of key points on collaborative learning groups. The key points include positive interdependence, group accountability performing, and face-to-face promotive interaction and teamwork skills. The positive interdependence is made up of goal interdependence, task interdependence, resource interdependence, role interdependence and reward interdepe...Show More
This amendment standard specifies mechanisms to enable multicast group management for MIH services. The specification defines management primitives and messages that enable a user to join, leave or update group membership and security mechanisms to protect multicast communication.Show More
Effectiveness Evaluation of Ideological and Political Education of College Students Combining Particle Swarm Optimization Model
2020 12th International Conference on Measuring Technology and Mechatronics Automation (ICMTMA)
Year: 2020 | Conference Paper |
Ideological and political education is a complex and dynamic system. The use of systematic scientific methods is conducive to seizing the process and development of ideological and political education as a whole dynamically. In this paper, the particle swarm optimization model is combined to establish a model for the group consciousness behavior of college students. In addition, positive and negat...Show More
A Riemannian geometry with complete geodesics for the set of positive semidefinite matrices of fixed rank
IMA Journal of Numerical Analysis
Cited by: Papers (11)
We present a homogeneous space geometry for the manifold of symmetric positive semidefinite matrices of fixed rank. The total space is a connected part of the general linear group endowed with its natural right-invariant metric and the metric on the homogeneous space is chosen such that the quotient space is the image of a Riemannian submersion from the total space. As a result, we obtain complete...Show More
Hypoglycemic and Hypolipidemic Activity of Total Saponins in Cinnamon
2010 4th International Conference on Bioinformatics and Biomedical Engineering
Year: 2010 | Conference Paper |
Hypoglycemic and Hypolipidemic activity of saponins in cinnamon on diabetic mice was studied. Methods: The diabetic mice were established by alloxan. Then the living diabetic mice were divided into six groups. Among them, three groups were treated with cinnamon total saponins 100, 200, 400mg/kg.bw by ig adminstration, and one group was given Xiaoke Pill 300mg/kg.bw by ig adminstration as positive ...Show More
This paper presents a design of transmission-type arbitrary terminated negative group delay (NGD) circuit with constant signal attenuation (SA). In the proposed circuit, the specified NGD and SA response can be designed by handling the characteristic impedance of transmission lines. Analytical analysis disseminates that the input and output ports of the proposed NGD circuit can perfectly match at ...Show More
Lie Group-Based Detector for Signal Detection
2024 IEEE INC-USNC-URSI Radio Science Meeting (Joint with AP-S Symposium)
Year: 2024 | Conference Paper |
This article assumes geometric characteristics of covariance matrices and applies certain group structures treating the entire covariance matrix as a Lie group. The feature relationship between signals and noise is established by leveraging the geometric features of Lie groups. Initially, all signal covariance matrices are considered as a manifold, and this manifold is transformed into a Lie group...Show More
Iwasawa Decomposition and Computational Riemannian Geometry
2010 20th International Conference on Pattern Recognition
Year: 2010 | Conference Paper |
Cited by: Papers (3)
We investigate several topics related to manifold-techniques for signal processing. On the most general level we consider manifolds with a Riemannian Geometry. These manifolds are characterized by their inner products on the tangent spaces. We describe the connection between the symmetric positive-definite matrices defining these inner products and the Cartan and the Iwasawa decomposition of the g...Show More
Working jointly in the equivalent categories of MV-algebras and lattice-ordered abelian groups with strong order unit (for short, unital ℓ-groups), we prove that isomorphism is a sufficient condition for a separating subalgebra A of a finitely presented algebra F to coincide with F. The separation and isomorphism conditions do not individually imply A = F. Various related problems, like the separa...Show More
Inferring Emotions from Image Social Networks Using Group-Based Factor Graph Model
2018 IEEE International Conference on Multimedia and Expo (ICME)
Year: 2018 | Conference Paper |
Cited by: Papers (6)
Inferring emotions from image social networks is a hot research topic nowadays. For image social networks (Flickr, Instagram), there is an interesting phenomenon that people would like to establish or attend virtual groups and share images with different topics and emotions in different groups. Previous researches on inferring emotions usually focus on image content and user personalization, thus ...Show More
Learning Mathematics Among University Engineering Students During The Pandemic: A Didactic Experience
Alejandro Manuel Ecos Espino;Zoraida Rocio Manrique Chávez;Joffré Huamán Nuñez;Silvia López Ibáñez
2021 IEEE World Conference on Engineering Education (EDUNINE)
Year: 2021 | Conference Paper |
Cited by: Papers (1)
The study evaluates engineering students' didactic experience and group learning appreciation of mathematics in 28 virtual groups using a teamwork and scientific debate strategy. The results show that the didactic experience supports the development of collaborative work and participation in decision-making. Besides, it establishes that collaboration is essential in problem-solving strategies and ...Show More
Analysis of virtual work groups and their relationship with the learning of mathematics in university students
Alejandro Ecos Espino;Joffré Huamán Núñez;Zoraida Manrique Chávez;Silvia López Ibañez
2020 IEEE International Symposium on Accreditation of Engineering and Computing Education (ICACIT)
Year: 2020 | Conference Paper |
The objective of the study was to evaluate a didactic strategy based on teamwork and scientific debate in virtual groups, in the collaborative learning of mathematics in engineering students. The individual and group learning and the appreciation of the experience by the students arranged in 12 working groups were analyzed, within the context of health emergency. The results show that the didactic...Show More
Nonorthogonal Joint Diagonalization by Combining Givens and Hyperbolic Rotations
A new algorithm for computing the nonorthogonal joint diagonalization of a set of matrices is proposed for independent component analysis and blind source separation applications. This algorithm is an extension of the Jacobi-like algorithm first proposed in the joint approximate diagonalization of eigenmatrices (JADE) method for orthogonal joint diagonalization. The improvement consists mainly in ...Show More
Adaptive Group Testing Models for Infection Detection of COVID-19
2020 IEEE International Smart Cities Conference (ISC2)
Year: 2020 | Conference Paper |
Cited by: Papers (2)
Two adaptive group testing models are studied based on zero-error criterion in this paper. Firstly, for the single-stage group testing model, the analytical expression of optimal number of grouping members without integer constraints is given. Secondly, the optimal number of grouping members with integer constraints are given by numerical calculation. Finally, a grouping coefficient-based multista...Show More
An Electronic Circuit Principle and Test Platform for Negative Group Delay and Superluminal Propagation
2022 International Conference on Computer Network, Electronic and Automation (ICCNEA)
Year: 2022 | Conference Paper |
Group velocity superluminal phenomenon, also known as negative group delay or negative group velocity phenomenon, refers to a group of envelope signals at the output end of the medium before the input, on the time axis, is the envelope on leaving the medium before entering the medium, but this does not violate causality. Based on the waveguide theory of negative group delay, this paper uses the tr...Show More
A compact Lie group $G$ and a faithful complex representation $V$ determine the Sato–Tate measure $\mu _{G,V}$ on ${\BBC}$, defined as the direct image of Haar measure with respect to the character map $g\mapsto {\rm tr}(g\mid V)$. We give a necessary and sufficient condition for a Sato–Tate measure to be an isolated point in the set of all Sato–Tate measures, endowed with the topology defined by ...Show More
In representation theory, the existence of a ℤ+-grading on a related finite dimensional algebra often plays an important role. For example, such a grading arises from the Koszul structure of the finite dimensional algebra representing the principal block of the BGG category 풪 associated to a complex semisimple Lie algebra. But Koszul gradings in positive characteristic have proved elusive. For exa...Show More
New results on quadratic stabilization of switched linear systems with polytopic uncertainties
In this paper, the quadratic stabilization of switched linear systems with polytopic uncertainties is considered. Compared with the existing result, a more general switching control method is proposed to guarantee the quadratic stabilization. This switching control method is based on the partition of the vertex matrix set of each subsystem. By this method, the matrix inequalities needed to be solv...Show More
Indoor Group Identification and Localization Using Privacy-Preserving Edge Computing Distributed Camera Network
Chaitra Hegde;Yashar Kiarashi;Amy D. Rodriguez;Allan I. Levey;Matthew Doiron;Hyeokhyen Kwon;Gari D. Clifford
Social interaction behaviors change as a result of both physical and psychiatric problems, and it is important to identify subtle changes in group activity engagements for monitoring the mental health of patients in clinics. This work proposes a system to identify when and where group formations occur in an approximately 1700 $ \text{m}^{2}$ therapeutic built environment using a distributed edge-c...Show More
Study of "Water of Life" on Repair of Human Umbilical Cord Mesenchymal Stem Cells
Siyuan Wu;Xinwei Wang;Xirui Chen;Le Yang;Yingshu Huang;Linze Wu
2019 10th International Conference on Information Technology in Medicine and Education (ITME)
Year: 2019 | Conference Paper |
H-MSC cell is a human pluripotent tissue cell. Through real-time dynamic observation of "water of life" prepared through "coded impulse treatment technology" in H-MSC cell growth and proliferation, apoptosis and drug killing experiments, it finds that the H-MSC cells cultured through the "water of life" culturing system have significant difference from the control group in terms of cell viability,...Show More
This amendment standard specifies mechanisms to enable multicast group management for MIH services. The specification defines management primitives and messages that enable a user to join, leave or update group membership and security mechanisms to protect multicast communication.Show More
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