Zobrazeno 1 - 10 of 17 pro vyhledávání: '"Masafumi Yamakawa"'
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Akademický článek
Sufficient condition for locally unidentifiable edge weights from any single-state trajectory in networked linear systems
Autor: Masafumi Yamakawa, Toru Asai, Ryo Ariizumi, Shun-ichi Azuma
Publikováno v: SICE Journal of Control, Measurement, and System Integration, Vol 17, Iss 1, Pp 80-86 (2024)
In this study, we analyse the local identifiability of parameters in linear systems whose state matrix is given by a graph Laplacian. Graph Laplacian is a matrix given by a graph and the weights of its edges, where the weights represent the parameter
Externí odkaz: https://doaj.org/article/91bc1496f85444d588204384dd7a5176
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2
Parameter Dependent Model Based on Linkages for State, Parameter and Input Estimation Method
Autor: Ryo Ariizumi, Shun-ichi Azuma, Masafumi Yamakawa, Toru Asai
Publikováno v: SICE
Web of Science
In this paper, we propose a modeling method that is suitable for the estimation of the state, parameter and input. The estimation method requires a model of a target system with parameters to be estimated. We propose a linkage modeling method to mode
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5f6137dfee0baaf19832017b726491f5
https://doi.org/10.23919/sice48898.2020.9240441
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6
Relation Between Residual Stress and Welding Strength in Laser Welding of Thermoplastic Resin Plates
Autor: Takashi Nakamura, Masafumi Yamakawa, Shinya Hayakawa, Tatsuya Hasegawa
Publikováno v: TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C. 74:3036-3041
Thermal and residual stresses induced in transparent thermoplastic resin during laser welding process are analyzed by photoelastic method in order to discuss the relationship between residual stress and welding strength. Photoelastic fringes indicati
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2d680ad95946f722cea0c039cf981479
https://doi.org/10.1299/kikaic.74.3036
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7
Study on Laser Welding of Transparent Thermoplastic Resin Plates
Autor: Masafumi Yamakawa, Takashi Nakamura, Shinya Hayakawa, Tatsuya Hasegawa
Publikováno v: TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C. 74:2079-2083
Characteristics of a new laser welding method for transparent thermoplastic resin plates are studied. The absorptivity on the surface is enhanced by pretreatment of sandblasting. It is found that the absorptivity due to roughness increases up to 36%
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6d473134b9dde0afb453614e4c73ac0d
https://doi.org/10.1299/kikaic.74.2079
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8
Sand drain works for a large‐scale man‐made Island
Autor: Masafumi Yamakawa, Tatsuhiko Tsuruoka
Publikováno v: Marine Georesources & Geotechnology. 14:251-262
Many ground improvement techniques have been developed for the safe support of structures constructed on weak ground. The sand drain method is an easy‐to‐design, highly economical method of ground improvement using the principle of accelerated co
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ee0d392815417af8e7e278478d91c96b
https://doi.org/10.1080/10641199609388315
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