Zobrazeno 1 - 10 of 110 pro vyhledávání: '"Katsumi Ishikawa"'
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Akademický článek
Energy-Management Method to Reduce the Capacity of Lithium-Ion Batteries in Hybrid-Voltage-Source Three-Level Inverter for DC-Electrified Railway Vehicles
Autor: Tadashi Mizobuchi, Keiichiro Kondo, Yosuke Dairaku, Takeshi Shinomiya, Katsumi Ishikawa
Publikováno v: IEEE Open Journal of Industry Applications, Vol 3, Pp 41-55 (2022)
The hybrid-voltage-source three-level inverter is a traction circuit system aimed at realizing energy savings with lithium-ion batteries for direct-current-electrified railway vehicles. However, this system has the limitation of being unable to freel
Externí odkaz: https://doaj.org/article/033e9296601343f081f41d1b4109df88
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4
Alternating knots with Alexander polynomials having unexpected zeros
Autor: Katsumi Ishikawa, Masaaki Suzuki, Mikami Hirasawa
Publikováno v: Topology and its Applications. 253:48-56
We give concrete counterexamples to a conjecture due to J. Hoste. Namely, we present alternating knots whose Alexander polynomials have zeros with real parts less than −1. Our knots are pretzel knots having alternating Montesinos diagrams.
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b02bbc4da66b3b05bc16a7e6986b078e
https://doi.org/10.1016/j.topol.2018.11.027
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6
Energy Management of Battery on Hybrid Voltage Source Three Level Inverter for Energy Saving Railway Vehicles
Autor: Takeshi Shinomiya, Tadashi Mizobuchi, Katsumi Ishikawa, Yosuke Dairaku, Keiichiro Kondo
Publikováno v: 2020 23rd International Conference on Electrical Machines and Systems (ICEMS).
Hybrid voltage source three level inverter has been studied which is combined with Li-ion battery (LiB) and DC line voltage for further energy saving of electric railway systems. In order to generate the energy saving effect of this system, it is nec
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::bb635196b177c5472b31208928028572
https://doi.org/10.23919/icems50442.2020.9290863
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9
Power Flow Control of a Hybrid Voltage Source Three Level Inverter for Energy Saving of Railway Vehicle Traction System
Autor: Tadashi Mizobuchi, Yosuke Dairaku, Katsumi Ishikawa, Keiichiro Kondo, Takeshi Shinomiya, Kouhei Aiso
Publikováno v: IECON
In this paper, an energy management strategy and a power flow control method are proposed through a 0.75 kW experimental set up with a motor drive system, with consideration of the actual switching. According to the experimental results, the state of
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::685dd34c1b3312b52a4f158f9977aa0a
https://doi.org/10.1109/iecon.2019.8927082
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10
Minimal coloring numbers on minimal diagrams of torus links
Autor: Katsumi Ishikawa, Eri Matsudo, Kazuhiro Ichihara
We determine the minimal number of colors for non-trivial $\mathbb{Z}$-colorings on the standard minimal diagrams of $\mathbb{Z}$-colorable torus links. Also included are complete classifications of such $\mathbb{Z}$-colorings and of such $\mathbb{Z}
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4b54bca9c7b054d09ab3a4021ca0c3e1
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