Patents by Inventor Yoshimasa Nakamura

Yoshimasa Nakamura has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20190211426
    Abstract: A spheroidal graphite cast iron having an excellent impact strength at low temperature and a method for producing the same are provided. The present disclosure relates to the spheroidal graphite cast iron comprising: C: 3.5 mass % to 4.2 mass %; Si: 2.0 mass % to 2.8 mass %; Mn: 0.2 mass % to 0.4 mass %; Cu: 0.1 mass % to 0.7 mass %; Mg: 0.02 mass % to 0.06 mass %; Cr: 0.01 mass % to 0.15 mass %; and the balance: Fe and inevitable impurities, wherein Mn+Cr+Cu is 0.431 mass % to 1.090 mass %, a graphite nodule count is 230/mm2 or less, and a pearlite fraction is 30% to 85%.
    Type: Application
    Filed: December 27, 2018
    Publication date: July 11, 2019
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, AISIN TAKAOKA CO., LTD.
    Inventors: Takumi Hijii, Yoshimasa Ureshino, Hitoshi Sakuma, Gou Nakamura, Zhong-zhi Zhang
  • Patent number: 10323293
    Abstract: A high-carbon hot rolled steel sheet with excellent hardenability and small in-plane anisotropy, and a method for manufacturing the steel sheet are provided. The steel sheet has a chemical composition including, by mass %, C: 0.20 to 0.48%, Si: not more than 0.1%, Mn: not more than 0.5%, P: not more than 0.03%, S: not more than 0.01%, sol. Al: not more than 0.10%, N: not more than 0.005% and B: 0.0005 to 0.0050%, the balance including Fe and inevitable impurities. The steel sheet includes a microstructure containing ferrite and cementite. The cementite has an average grain size of not more than 1.0 ?m. The steel sheet has an in-plane anisotropy of r value, ?r, of not more than 0.1 in absolute value.
    Type: Grant
    Filed: December 25, 2012
    Date of Patent: June 18, 2019
    Assignee: JFE Steel Corporation
    Inventors: Yuka Miyamoto, Takashi Kobayashi, Nobuyuki Nakamura, Yoshimasa Funakawa
  • Patent number: 10301698
    Abstract: A hot-rolled steel sheet for a generator rim contains a structure containing a ferrite phase with an areal ratio of 95% or more in which precipitates containing Ti and V whose average grain diameter is less than 10 nm are precipitated in crystal grains of the ferrite phase. The ferrite phase has an average crystal grain diameter within the range of 2 ?m or more and less than 10 ?m. The hot-rolled steel sheet for a generator rim has strength with a yield strength YS in a rolling direction of 700 MPa or more and electromagnetic properties with a magnetic flux density B50 of 1.5 T or more and a magnetic flux density B100 of 1.6 T or more.
    Type: Grant
    Filed: January 30, 2013
    Date of Patent: May 28, 2019
    Assignee: JFE Steel Corporation
    Inventors: Nobuyuki Nakamura, Katsumi Nakajima, Yoshimasa Funakawa, Kazutaka Okimoto, Takahiko Ogura
  • Patent number: 8306361
    Abstract: A singular value decomposition method according to the present invention is a method for performing a singular value decomposition on an arbitrary matrix A using a computer, the method including the steps of: performing an upper bidiagonalization on the matrix A so as to obtain an upper bidiagonal matrix B of the matrix A; obtaining at least one singular value ? of the matrix B as singular values of the matrix A; and obtaining a singular vector of the matrix A for the ?. The step of obtaining a singular vector of the matrix A includes a step of performing a Twisted decomposition on a matrix BTB??2I (where I is a unit matrix) by using a Miura inverse transformation, an sdLVvs transformation, an rdLVvs transformation and a Miura transformation so as to diagonalize a matrix BTB.
    Type: Grant
    Filed: June 1, 2005
    Date of Patent: November 6, 2012
    Assignee: Japan Science and Technology Agency
    Inventors: Yoshimasa Nakamura, Masashi Iwasaki, Shinya Sakano
  • Patent number: 8255447
    Abstract: The present invention provides an eigenvalue decomposition apparatus that can perform processing in parallel at high speed and high accuracy.
    Type: Grant
    Filed: January 31, 2007
    Date of Patent: August 28, 2012
    Assignee: Kyoto University
    Inventors: Yoshimasa Nakamura, Hiroaki Tsuboi, Taro Konda, Masashi Iwasaki, Masami Takata
  • Patent number: 8160368
    Abstract: The image feature extraction method of the present invention includes: the step of performing k2 dividing process at least once on a given image so as to convert the given image into a multi-divided image, where the k2 dividing process comprises the steps of: a) creating matrix T based on image matrix X; b) computing singular values of the matrix T; c) determining whether or not minj|?j??j?1|>?; d) if the result of the determination in the step c) is “No”, returning to the step c) subsequent to computing the singular values of the enlarged matrix T?; e) if the result of the determination in the step c) is “Yes”, obtaining U which satisfies T=USVT; f) obtaining matrix T1=UTT; and g) creating image matrix X1 based on matrix T1.
    Type: Grant
    Filed: February 2, 2007
    Date of Patent: April 17, 2012
    Assignees: Japan Science and Technology Agency, The Doshisha
    Inventors: Yoshimasa Nakamura, Masashi Iwasaki, Masahiko Obata, Koichi Kondo, Shohei Sasada
  • Publication number: 20100185716
    Abstract: The present invention provides an eigenvalue decomposition apparatus that can perform processing in parallel at high speed and high accuracy.
    Type: Application
    Filed: January 31, 2007
    Publication date: July 22, 2010
    Inventors: Yoshimasa Nakamura, Hiroaki Tsuboi, Taro Konda, Masashi Iwasaki, Masami Takata
  • Publication number: 20090324064
    Abstract: The image feature extraction method of the present invention includes: the step of performing k2 dividing process at least once on a given image so as to convert the given image into a multi-divided image, where the k2 dividing process comprises the steps of: a) creating matrix T based on image matrix X; b) computing singular values of the matrix T; c) determining whether or not minj|?j??j?1|>?; d) if the result of the determination in the step c) is “No”, returning to the step c) subsequent to computing the singular values of the enlarged matrix T?; e) if the result of the determination in the step c) is “Yes”, obtaining U which satisfies T=USVT; f) obtaining matrix T1=UTT; and g) creating image matrix X1 based on matrix T1.
    Type: Application
    Filed: February 2, 2007
    Publication date: December 31, 2009
    Applicants: JAPAN SCIENCE AND TECHNOLOGY AGENCY, THE DOSHISHA
    Inventors: Yoshimasa Nakamura, Masashi Iwasaki, Masahiko Obata, Koichi Kondo, Shohei Sasada
  • Publication number: 20090216821
    Abstract: The present invention provides a singular value decomposition apparatus that can perform processing in parallel at high speed and high accuracy.
    Type: Application
    Filed: September 21, 2006
    Publication date: August 27, 2009
    Applicant: KYOTO UNIVERSITY
    Inventors: Yoshimasa Nakamura, Taro Konda, Masashi Iwasaki, Shinya Sakano, Masami Takata
  • Publication number: 20090028455
    Abstract: A singular value decomposition method according to the present invention is a method for performing a singular value decomposition on an arbitrary matrix A using a computer, the method including the steps of: performing an upper bidiagonalization on the matrix A so as to obtain an upper bidiagonal matrix B of the matrix A; obtaining at least one singular value ? of the matrix B as singular values of the matrix A; and obtaining a singular vector of the matrix A for the ?. The step of obtaining a singular vector of the matrix A includes a step of performing a Twisted decomposition on a matrix BTB??2I (where I is a unit matrix) by using a Miura inverse transformation, an sdLVvs transformation, an rdLVvs transformation and a Miura transformation so as to diagonalize a matrix BTB.
    Type: Application
    Filed: June 1, 2005
    Publication date: January 29, 2009
    Applicant: JAPAN SCIENCE AND TECHNOLOGY AGENCY
    Inventors: Yoshimasa Nakamura, Masashi Iwasaki, Shinya Sakano
  • Patent number: 6253218
    Abstract: When the user directs to change the view point within a virtual 3-D coordinate space having thereon displayed reduced images as a list of data by successively inputting a view point moving in an arbitrary direction, a trace of the movement of the view point is displayed within the screen. Thus, it has become possible to visualize individual data files in the database and the relationship among each item of the data. Consequently, the user can readily manage the data and retrieve the information he needs.
    Type: Grant
    Filed: December 23, 1997
    Date of Patent: June 26, 2001
    Inventors: Atsushi Aoki, Satoshi Suzuki, Yasuhiro Aitani, Atsushi Ono, Yasuji Obuchi, Yoshimasa Nakamura
  • Patent number: 5875270
    Abstract: The image display device of the present invention includes a clear code detecting section for detecting a clear code that is input in an arbitrary position beforehand in a compressed image file when carrying out decompression, a status information extracting section for extracting status information of the clear code, an information storing section for storing the clear code and the status information of the clear code, a stored information searching section for searching a clear code nearest to a partial decompression start position from the status information upon receiving a request for partial decompression, and a partial decompression starting section which determines the partial decompression start position in the compressed image file, and subsequently starts decompression from the partial decompression start position.
    Type: Grant
    Filed: May 23, 1997
    Date of Patent: February 23, 1999
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Yoshimasa Nakamura
  • Patent number: 4986948
    Abstract: A molding process of fiber reinforced plastics which includes:placing fiber reinforcements on a half of a mold which has positive pinch-off edges:positioning the mold halves near to each other to grasp the fibers between the pinch-off edges;injecting a resin into a mold cavity through a resin injection opening provided in the mold; andclosing the mold. This process permits the use of low viscosity resins without the escape of the resin from the mold during the impregnation of fiber reinforcements in the mold cavity, so that the process can readily produce in practical manners fiber reinforced plastics with high fiber contents as much as about 50-80% by weight that have not been achieved by the conventional resin injection and mat or preform matched die molding processes.
    Type: Grant
    Filed: April 24, 1989
    Date of Patent: January 22, 1991
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Kiyoshi Komiya, Yoshimasa Nakamura
  • Patent number: 4831111
    Abstract: A cross-linked resin produced by the reaction of a bis(2-oxazoline) compound with a dicarboxylic acid anhydride, and optionally also with at least one selected from the group consisting of a dicarboxylic acid, a hydroxy-carboxylic acid, a diol and water, in the presence of at least one catalyst selected from the group consisting of an organic phosphorous acid ester, an organic phosphonous acid ester and an inorganic salt at an elevated temperature. The cross-linked resin has a high mechanical strength and a high resistance to organic solvents.The resin composition comprising the cross-linked resin and reinforcements and/or fillers combined therewith has outstanding heat-resistance and mechanical properties.
    Type: Grant
    Filed: May 18, 1988
    Date of Patent: May 16, 1989
    Assignee: Takeda Chemical Industries, Inc.
    Inventors: Yasuo Sano, Yasuhiro Morisue, Kiyoshi Komiya, Yoshimasa Nakamura
  • Patent number: 4764587
    Abstract: A cross-linked resin produced by the reaction of a bis(2-oxazoline) compound with a dicarboxylic acid anhydride, and optionally also with at least one selected from the group consisting of a dicarboxylic acid, a hydroxy-carboxylic acid, a diol and water, in the presence of at least one catalyst selected from the group consisting of an organic phosphorous acid ester, an organic phosphonous acid ester and an inorganic salt at an elevated temperature. The cross-linked resin has a high mechanical strength and a high resistance to organic solvents.The resin composition comprising the cross-linked resin and reinforcements materials and/or fillers combined therewith has outstanding heat-resistance and mechanical properties.
    Type: Grant
    Filed: October 29, 1985
    Date of Patent: August 16, 1988
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Yasuo Sano, Yasuhiro Morisue, Kiyoshi Komiya, Yoshimasa Nakamura