Results 11 to 20 of about 1,206,915 (318)

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, M-W, Dechant, P-P, He, Y-H, Heyes, E, Hirst, E, Li, J-R   +5 more
openaire   +4 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

To cluster, or not to cluster: An analysis of clusterability methods [PDF]

Pattern Recognition, 2019
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
openaire   +2 more sources

A hybrid clustering method based on the several diverse basic clustering and meta-clustering aggregation technique [PDF]

, 2022
In hybrid clustering, several basic clustering is first generated and then for the clustering aggregation, a function is used in order to create a final clustering that is similar to all the basic clustering as much as possible.
Saeidlou, Salman, Lu, Bei, Zhou, Bing
core   +1 more source

Clustering of Cities Based on Their Smart Performances: A Comparative Approach of Fuzzy C-Means, K-Means, and K-Medoids

IEEE Access, 2023
Smart City is recognized as a potential approach to address serious urban issues such as traffic, pollution, energy use, and waste management. Therefore, it is vital to evaluate how smart cities are in order to put these methods into practice.
Omer N. Kenger, Zulal Diri Kenger, Eren Ozceylan, Beata Mrugalska   +3 more
doaj   +1 more source

Persistence in cluster-cluster aggregation [PDF]

Physical Review E, 2002
Persistence is considered in diffusion--limited cluster--cluster aggregation, in one dimension and when the diffusion coefficient of a cluster depends on its size $s$ as $D(s) \sim s^γ$. The empty and filled site persistences are defined as the probabilities, that a site has been either empty or covered by a cluster all the time whereas the cluster ...
Hellén, E.K.O., Alava, M.J.
openaire   +4 more sources

K-MEANS AND AGGLOMERATIVE HIERARCHICAL CLUSTERING ANALYSIS OF ESG SCORES, YEARLY VARIATIONS, AND STOCK RETURNS: INSIGHTS FROM THE ENERGY SECTOR IN EUROPE AND THE UNITED STATES [PDF]

Revista de Studii Financiare, 2023
This study employs k-means clustering and agglomerative hierarchical clustering techniques to visually examine the potential relationship between Environmental Social and Governance (ESG) scores, their year-over-year variations, and annual stock returns ...
Ștefan Rusu, Marcel Ioan Boloș, Marius Leordeanu   +2 more
doaj   +1 more source

Clustering Cycles into Cycles of Clusters [PDF]

Journal of Graph Algorithms and Applications, 2005
Summary: We study simple families of clustered graphs that are highly unconnected. We start by studying 3-cluster cycles, which are clustered graphs such that the underlying graph is a simple cycle and there are three clusters all at the same level. We show that in this case, testing the c-planarity can be done efficiently and give an efficient drawing
Pier Francesco Cortese, Giuseppe Di Battista, Maurizio Patrignani, Maurizio Pizzonia   +3 more
openaire   +3 more sources

A GNSS/5G Integrated Three-Dimensional Positioning Scheme Based on D2D Communication

Remote Sensing, 2022
The fifth generation (5G) communication has the potential to achieve ubiquitous positioning when integrated with a global navigation satellite system (GNSS).
Wei Zhang, Yuanxi Yang, Anmin Zeng, Yangyin Xu   +3 more
doaj   +1 more source

On the predictibility of A-minor motifs from their local contexts

RNA Biology, 2022
This study investigates the importance of the structural context in the formation of a type I/II A-minor motif. This very frequent structural motif has been shown to be important in the spatial folding of RNA molecules.
Coline Gianfrotta, Vladimir Reinharz, Olivier Lespinet, Dominique Barth, Alain Denise   +4 more
doaj   +1 more source