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- Kyushu UniversityJP4 papers
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- Okayama University of ScienceJP1 paper
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cs.LG2020
Estimation of the number of clusters on d-dimensional sphere
Kazuhisa Fujita
Spherical data is distributed on the sphere. The data appears in various fields such as meteorology, biology, and natural language processing. However, a method for analysis of sph…
cs.LG2020★ 7 cited
Approximate spectral clustering using both reference vectors and topology of the network generated by growing neural gas
Kazuhisa Fujita
Spectral clustering (SC) is one of the most popular clustering methods and often outperforms traditional clustering methods. SC uses the eigenvectors of a Laplacian matrix calculat…
quant-ph2020
On the open Dicke-type model generated by an infinite-component vector spin
Ryota Kyokawa, Hajime Moriya, Hiroshi Tamura
We consider an open Dicke model comprising a single infinite-component vector spin and a single-mode harmonic oscillator which are connected by Jaynes--Cummings-type interaction be…