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To Cluster, or Not to Cluster: An Analysis of Clusterability Methods [PDF]

Pattern Recognition, 2018
Clustering is an essential data mining tool that aims to discover inherent cluster structure in data. For most applications, applying clustering is only appropriate when cluster structure is present. As such, the study of clusterability, which evaluates whether data possesses such structure, is an integral part of cluster analysis. However, methods for
Andreas Adolfsson, Margareta Ackerman, Naomi C. Brownstein   +2 more
arxiv   +5 more sources

Clustering of CODEX clusters [PDF]

Astronomy & Astrophysics, 2021
Context. The clustering of galaxy clusters links the spatial nonuniformity of dark matter halos to the growth of the primordial spectrum of perturbations. The amplitude of the clustering signal is widely used to estimate the halo mass of astrophysical objects.
N. Padilla, Johan Comparat, Eli S. Rykoff, Eli S. Rykoff, S. Damsted, Chris A. Collins, V. Lindholm, V. Lindholm, Nicolas Clerc, C. C. Kirkpatrick, C. C. Kirkpatrick, Alexis Finoguenov, J. Ider Chitham   +12 more
openaire   +7 more sources

Clustering cluster algebras with clusters

Advances in Theoretical and Mathematical Physics, 2023
Classification of cluster variables in cluster algebras (in particular, Grassmannian cluster algebras) is an important problem, which has direct application to computations of scattering amplitudes in physics. In this paper, we apply the tableaux method to classify cluster variables in Grassmannian cluster algebras $\mathbb{C}[Gr(k,n)]$ up to $(k,n)=(3,
Cheung, Man-Wai, Dechant, Pierre-Philippe, He, Yang-Hui, Heyes, Elli, Hirst, Edward, Li, Jian-Rong   +5 more
openaire   +2 more sources

Implementation of Tunneling Junction Passivated Contact Concept in Flexible CIGS Solar Cells

Advanced Materials Interfaces, 2023
In today's state‐of‐the‐art high‐efficiency silicon solar cells need to be inserted a thin insulating layer in order to reduce the recombination losses between the carrier transport layer and Si surface, which can form a tunneling junction (TJ), thus ...
Xuan Chang, Jingwei Chen, Shuangyi Ma, Bingbing Chen, Xuning Zhang, Qing Gao, Feng Li, Jianming Wang, Dengyuan Song, Jianhui Chen   +9 more
doaj   +1 more source

Algorithms with greedy heuristic procedures for mixture probability distribution separation [PDF]

Yugoslav Journal of Operations Research, 2019
For clustering problems based on the model of mixture probability distribution separation, we propose new Variable Neighbourhood Search algorithms (VNS) and evolutionary genetic algorithms (GA) with greedy agglomerative heuristic procedures and compare ...
Kazakovtsev Lev, Stashkov Dmitry, Gudyma Mikhail, Kazakovtsev Vladimir   +3 more
doaj   +1 more source

UAV-Based Crowd Surveillance in Post COVID-19 Era

IEEE Access, 2021
Since outdoor events are gradually allowed within the current pandemic situation, a close monitoring of the crowd activity is needed to avoid undesired contact and disease transmission. In this context, unmanned aerial vehicles (UAVs) can be occasionally
Nizar Masmoudi, Wael Jaafar, Safa Cherif, Jihene Ben Abderrazak, Halim Yanikomeroglu   +4 more
doaj   +1 more source

Recent Advances in Computer-Assisted Algorithms for Cell Subtype Identification of Cytometry Data

Frontiers in Cell and Developmental Biology, 2020
The progress in the field of high-dimensional cytometry has greatly increased the number of markers that can be simultaneously analyzed producing datasets with large numbers of parameters.
Peng Liu, Silvia Liu, Yusi Fang, Xiangning Xue, Jian Zou, George Tseng, Liza Konnikova, Liza Konnikova, Liza Konnikova   +8 more
doaj   +1 more source

Justification of the choice of the method and criterion of clustering for intelligent analysis in flight control spacecraft

Космические аппараты и технологии, 2020
The article examines the methods of intelligent analysis of telemetric information of spacecraft. The current state and main shortcomings of the control process during the spacecraft flight control are briefly given.
S. V. Soloviev
doaj   +1 more source

Developing a Comprehensive Framework for Crowd Funding Factors by Using the Hexagon Technique

HighTech and Innovation Journal, 2021
In recent years, crowd funding has seriously been considered as a novel method of financing start-up businesses and innovative ideas. In its short life time so far, the method has significantly grown in different aspects such as the number of proposed ...
Ali Haji Gholam Saryazdi, Ali Rajabzadeh Ghatari, Alinaghi Mashayekhi, Alireza Hasanzadeh   +3 more
doaj   +1 more source

Cluster algebras generated by projective cluster variables [PDF]

J. Algebra, 627 (2023), 1-42, 2020
We introduce the notion of a lower bound cluster algebra generated by projective cluster variables as a polynomial ring over the initial cluster variables and the so-called projective cluster variables. We show that under an acyclicity assumption, the cluster algebra and the lower bound cluster algebra generated by projective cluster variables coincide.
arxiv   +1 more source