Patents by Inventor Takayuki Nakata

Takayuki Nakata 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).

  • Patent number: 9104641
    Abstract: An information processing device calculates a mean and a variance of a response variable for each range determined based on a partition candidate being information on partitioning a domain of an explanatory variable into a plurality of ranges based on observed data and the mean and the variance are dependent on the explanatory variable, selects a specific partition candidate among a plurality of the partition candidates using an information criterion calculated based on the observed data and the calculated mean and variance of the response variable, and calculates a smooth function representing the variance of the response variable in the domain of the explanatory variable and a smooth function representing the mean of the response variable in the domain of the explanatory variable based on the mean and the variance calculated for each range determined based on the specific partition candidate.
    Type: Grant
    Filed: December 7, 2010
    Date of Patent: August 11, 2015
    Assignee: NEC CORPORATION
    Inventors: Kenji Aoki, Takayuki Nakata
  • Patent number: 8878720
    Abstract: To detect an abnormal value in a satellite positioning system with high precision even when the observation environment changes or there is the time series correlation between data. An abnormal value index calculation unit 11 calculates an abnormal value index at each time of time-series data such as a pseudo distance between each artificial satellite and a receiver in the satellite positioning system or the like. A dynamic model forming unit 12 dynamically forms a model from the abnormal value index in a predetermined period and calculates a change point index from the time-series abnormal value index based on the dynamic model. The change point index is an index for determining whether the time-series is a one-shot outlier from a dynamic model or the dynamic model itself of input data changes when the time-series value which suddenly increases and decreases exists.
    Type: Grant
    Filed: February 25, 2011
    Date of Patent: November 4, 2014
    Assignee: NEC Corporation
    Inventors: Takeshi Ono, Kazushi Suzuki, Takayuki Kaneso, Takayuki Nakata, Kenji Aoki
  • Patent number: 8611228
    Abstract: A network management apparatus in a mobile communication network holds a communication quality index in a normal operation and periodically receives input of a communication quality measurement result from a radio base station control apparatus. When a connection failure count f with respect to a connection request count a of each radio cell is obtained as a measurement result, letting p0 be the call loss rate in the normal operation, an upper probability B of a binomial distribution representing the connection failure count becomes larger than f is obtained (step 524). The negative logarithm of the upper probability B is obtained as the score of the degree of abnormality (step 525). Anomaly of communication is detected when the score of the degree of abnormality exceeds a predetermined threshold value (steps 526 and 527). After that, maintenance control is executed in accordance with the calculated score of the degree of abnormality, thereby appropriately avoiding a fault of the communication system.
    Type: Grant
    Filed: June 2, 2006
    Date of Patent: December 17, 2013
    Assignee: NEC Corporation
    Inventors: Yasuhiko Matsunaga, Junichi Takeuchi, Takayuki Nakata
  • Patent number: 8447705
    Abstract: Disclosed is an apparatus that generates automatically a characteristic pattern in time series data by clustering a plurality of time series subsequences generated from the time series data. The apparatus includes a time series subsequence generation unit that generates a plurality of time series subsequences from the time series data, a phase alignment unit that aligns a phase of the generated time series subsequence, a clustering unit that performs clustering of a plurality of the time series subsequences, each having a phase aligned, a storage apparatus that stores the pattern obtained by the clustering, and an output apparatus that outputs the stored pattern.
    Type: Grant
    Filed: February 21, 2008
    Date of Patent: May 21, 2013
    Assignee: NEC Corporation
    Inventors: Ryohei Fujimaki, Syunsuke Hirose, Takayuki Nakata
  • Patent number: 8370108
    Abstract: A diagnostic device detects a fault and estimates its cause based on the degree of change of measured data attributes. A diagnostic object change degree pattern (CDP) generation unit calculates the degree of change of each attribute of data, including attributes of the object being diagnosed measured from the object being diagnosed to generate a diagnostic object CDP which is a combination of values of the degree of change of the respective attributes. A criterion CDP memory holds in store a criterion CDP, formed of a pattern of values of the degree of change of the attributes of data measured from the object being diagnosed, in association with event(s)-to-be-diagnosed on the fault sort basis or on the fault cause basis. A CDP diagnosis unit effects pattern matching between the diagnostic object CDP and the criterion CDP in the criterion CDP memory to diagnose the object being diagnosed.
    Type: Grant
    Filed: March 21, 2008
    Date of Patent: February 5, 2013
    Assignee: NEC Corporation
    Inventors: Ryohei Fujimaki, Takayuki Nakata, Akinori Satou, Hidenori Tsukahara
  • Publication number: 20120331024
    Abstract: An information processing device can obtain an accurate result of regression analysis even if a mean and a variance of a response variable depends on an explanatory variable taking continuous variable. An information processing device calculates a mean of and a variance of a response variable for each range which is determined based on a partition candidate being information on partitioning a domain of an explanatory variable into a plurality of ranges based on observed data including information representing the explanatory variable and information representing the response variable being an observed value in terms of the explanatory variable and the mean and the variance are dependent on the explanatory variable. The information processing device selects a specific partition candidate among a plurality of the partition candidates by using an information criterion which is calculated based on the observed data and the calculated mean and variance of the response variable.
    Type: Application
    Filed: December 7, 2010
    Publication date: December 27, 2012
    Applicant: NEC CORPORATION
    Inventors: Kenji Aoki, Takayuki Nakata
  • Patent number: 8090523
    Abstract: Disclosed is a travel-time prediction apparatus that is capable of making a mid-term prediction of travel time accurately by combining present conditions and statistical information. The apparatus includes a travel-time transition pattern database storing travel-time transition patterns obtained by statistically processing past time-series data of each road link according to type of data. Upon accepting a travel-time transition pattern corresponding to a specified link and day type from the database, the apparatus calculates conversion parameters of a travel-time transition pattern for which an error between the travel-time transition pattern and a sequentially input travel-time time-series data will be reduced, and then makes a prediction using a prediction function obtained by converting the travel-time transition pattern by the calculated conversion parameters. The calculated predicted value and the conversion parameters are distributed as traffic information.
    Type: Grant
    Filed: October 15, 2007
    Date of Patent: January 3, 2012
    Assignees: NEC Corporation, NEC Soft, Ltd.
    Inventors: Junichi Takeuchi, Takayuki Nakata, Takashi Fujita, Yasuhiro Sugisaki
  • Publication number: 20110227786
    Abstract: To detect an abnormal value in a satellite positioning system with high precision even when the observation environment changes or there is the time series correlation between data. An abnormal value index calculation unit 11 calculates an abnormal value index at each time of time-series data such as a pseudo distance between each artificial satellite and a receiver in the satellite positioning system or the like. A dynamic model forming unit 12 dynamically forms a model from the abnormal value index in a predetermined period and calculates a change point index from the time-series abnormal value index based on the dynamic model. The change point index is an index for determining whether the time-series is a one-shot outlier from a dynamic model or the dynamic model itself of input data changes when the time-series value which suddenly increases and decreases exists.
    Type: Application
    Filed: February 25, 2011
    Publication date: September 22, 2011
    Inventors: TAKESHI ONO, Kazushi Suzuki, Takayuki Kaneso, Takayuki Nakata, Kenji Aoki
  • Patent number: 7998562
    Abstract: The present invention provides a new photocatalyst sheet in which the substrates coated with fluorocarbon resin are readily weldable mutually, and also of the high antifouling and water-repellant property by coating the outermost surface of film/fabric structure with fluorocarbon resin containing a photocatalyst and a photocatalyst sheet comprises a substrate (2), a first fluorocarbon resin layer (3) coated on said substrate (2), a second fluorocarbon resin layer (4) coated on said first fluorocarbon resin layer (3), and a third fluorocarbon resin layer (5) containing photocatalyst coated on said second fluorocarbon resin layer (4). The melting point of the first fluorocarbon resin layer (3) may be higher than the melting points of the second and the third fluorocarbon resin layers (4), (5).
    Type: Grant
    Filed: July 2, 2004
    Date of Patent: August 16, 2011
    Assignee: Taiyo Kogyo Corporation
    Inventors: Kazuhiro Abe, Hiroshi Toyoda, Takayuki Nakata, Eiichi Okamoto, Akira Fujishima, Kazuhito Hashimoto
  • Patent number: 7910513
    Abstract: The present invention provides the photocatalyst sheet and the methods of welding and manufacturing the same, by which the substrate and resin of the photocatalyst-containing layer are not decomposed by photocatalyst particles, mutual welding of sheets is easy, and the photo-redox effect of a photocatalyst can be obtained. A photocatalyst sheet (1b) comprises a substrate (2) such as fiber and coated layers (3) on both sides of the substrate (2), and the coated layer (3) constitutes the photocatalyst-containing layer in which apatite-coated photocatalyst particles (4) are dispersed and fixed with resin. Here, the coated photocatalyst particles (4) on the surface of the photocatalyst-containing layer are so fixed as to have the parts exposed from the surface of the photocatalyst-containing layer.
    Type: Grant
    Filed: December 10, 2004
    Date of Patent: March 22, 2011
    Assignee: Taiyo Kogyo Corporation
    Inventors: Hiroshi Toyoda, Kazuhiro Abe, Takayuki Nakata
  • Patent number: 7891285
    Abstract: In a swash plate hydraulic pump or motor structured so that a convex arc surface on the back surface of a swash plate is supported on a concave arc surface of a swash plate support via a bearing in a manner enabling the arc surface to swing in the circumferential direction that follows the arc path. A restricting pin is included for restricting movements of the bearing. The assembly structure prevents the restricting pin from coming out of the swash plate and the swash plate support. One end of the restricting pin is supported rotatably on a side surface of the swash plate. An intermediate portion of the restricting pin is engaged in an engagement hole formed in a holder of the bearing in a loosely fitting manner. Finally, the other end of the restricting pin is inserted into a support rod supported rotatably around its axis on the swash plate support to permit movement of the restricting pin in a pin axial direction.
    Type: Grant
    Filed: November 8, 2007
    Date of Patent: February 22, 2011
    Assignees: Caterpillar Inc., Caterpillar Japan Ltd.
    Inventors: Hideaki Tanemura, Takayuki Nakata
  • Publication number: 20100279596
    Abstract: Provided is a vehicle-mounted temperature control device capable of effectively discharging the exhaust air, which is generated during the driving of a temperature control unit which blows off cooled or warmed air, to the outside of a vehicle. A temperature control unit (1) which blows off the air temperature-controlled by a cooling or warming action is attached to the inside (2) of a vehicle, and an exhaust port (33) is provided at the wall (2a) of a vehicle body to discharge the exhaust air generated during the driving of the temperature control unit to the outside of the vehicle.
    Type: Application
    Filed: October 22, 2008
    Publication date: November 4, 2010
    Inventors: Yuji Emura, Hiroya Ishikawa, Keishi Matsui, Eiichi Okamoto, Takayuki Nakata, Noriaki Sakamoto, Koichiro Ochiai
  • Publication number: 20100263395
    Abstract: Provided is a vehicle-mounted temperature control device (2) capable of suppressing resource wasting or environmental contamination during an idling stop, an easily installed vehicle-mounted refrigeration unit which blows off cooled or warmed air to the inside of a vehicle, and selectively cooling or warming not only a napping cabin behind the driver's seat, but also the driver's seat. The vehicle-mounted temperature control device includes a refrigeration unit having a refrigeration cycle in which a compressor, a condenser, and an evaporator to which driving electric power is supplied by a battery 5 are annularly connected; a temperature control chamber formed from a heat-insulating wall body having a blowoff air trunk and a return air trunk and having a circulation fan and the evaporator in the refrigeration cycle housed therein; and a machine chamber in which the compressor, the condenser, and a radiation fan which cools the compressor and condenser are disposed.
    Type: Application
    Filed: October 30, 2008
    Publication date: October 21, 2010
    Inventors: Kosaku Adachi, Noriaki Sakamoto, Tatsuya Ozaki, Koichiro Ochiai, Yuji Emura, Hiroya Ishikawa, Takayuki Nakata
  • Publication number: 20100131800
    Abstract: A diagnostic device which detects a fault and estimates its cause on the basis of the degree of variation of each attribute of data containing a plurality of attributes obtained by measuring a diagnosis subject. A diagnosis subject variation degree pattern generation means (110) calculates the degree of variation of each attribute of the diagnosis subject data containing the attributes obtained by measuring the diagnosis subject and generates a diagnosis subject variation degree pattern which is a combination of the degrees of variation of the attributes. A reference variation degree pattern storage device (150) stores a reference variation degree pattern composed of the degrees of variation of the attributes in association with the type of the fault and the diagnosis event of the type of the cause.
    Type: Application
    Filed: March 21, 2008
    Publication date: May 27, 2010
    Applicant: NEC CORPORATION
    Inventors: Ryohei Fujimaki, Takayuki Nakata, Akinori Satou, Hidenori Tsukahara
  • Publication number: 20100121793
    Abstract: Disclosed is an apparatus that generates automatically a characteristic pattern in time series data by clustering a plurality of time series subsequences generated from the time series data. The apparatus includes a time series subsequence generation unit that generates a plurality of time series subsequences from the time series data, a phase alignment unit that aligns a phase of the generated time series subsequence, a clustering unit that performs clustering of a plurality of the time series subsequences, each having a phase aligned, a storage apparatus that stores the pattern obtained by the clustering, and an output apparatus that outputs the stored pattern.
    Type: Application
    Filed: February 21, 2008
    Publication date: May 13, 2010
    Inventors: Ryohei Fujimaki, Syunsuke Hirose, Takayuki Nakata
  • Publication number: 20090120279
    Abstract: In a swash plate hydraulic pump or motor structured so that a convex arc surface on the back surface of a swash plate is supported on a concave arc surface of a swash plate support via a bearing in a manner enabling the arc surface to swing in the circumferential direction that follows the arc path. A restricting pin is included for restricting movements of the bearing. The assembly structure prevents the restricting pin from coming out of the swash plate and the swash plate support. One end of the restricting pin is supported rotatably on a side surface of the swash plate. An intermediate portion of the restricting pin is engaged in an engagement hole formed in a holder of the bearing in a loosely fitting manner. Finally, the other end of the restricting pin is inserted into a support rod supported rotatably around its axis on the swash plate support to permit movement of the restricting pin in a pin axial direction.
    Type: Application
    Filed: November 8, 2007
    Publication date: May 14, 2009
    Inventors: Hideaki Tanemura, Takayuki Nakata
  • Publication number: 20090052330
    Abstract: A network management apparatus in a mobile communication network holds a communication quality index in a normal operation and periodically receives input of a communication quality measurement result from a radio base station control apparatus. When a connection failure count f with respect to a connection request count a of each radio cell is obtained as a measurement result, letting p0 be the call loss rate in the normal operation, an upper probability B of a binomial distribution representing the connection failure count becomes larger than f is obtained (step 524). The negative logarithm of the upper probability B is obtained as the score of the degree of abnormality (step 525). Anomaly of communication is detected when the score of the degree of abnormality exceeds a predetermined threshold value (steps 526 and 527). After that, maintenance control is executed in accordance with the calculated score of the degree of abnormality, thereby appropriately avoiding a fault of the communication system.
    Type: Application
    Filed: June 2, 2006
    Publication date: February 26, 2009
    Applicant: NEC CORPORATION
    Inventors: Yasuhiko Matsunaga, Junichi Takeuchi, Takayuki Nakata
  • Publication number: 20080097686
    Abstract: Disclosed is a travel-time prediction apparatus that is capable of making a mid-term prediction of travel time accurately by combining present conditions and statistical information. The apparatus includes a travel-time transition pattern database storing travel-time transition patterns obtained by statistically processing past time-series data of each road link according to type of data. Upon accepting a travel-time transition pattern corresponding to a specified link and day type from the database, the apparatus calculates conversion parameters of a travel-time transition pattern for which an error between the travel-time transition pattern and a sequentially input travel-time time-series data will be reduced, and then makes a prediction using a prediction function obtained by converting the travel-time transition pattern by the calculated conversion parameters. The calculated predicted value and the conversion parameters are distributed as traffic information.
    Type: Application
    Filed: October 15, 2007
    Publication date: April 24, 2008
    Inventors: Junichi Takeuchi, Takayuki Nakata, Takashi Fujita, Yasuhiro Sugisaki
  • Publication number: 20070148424
    Abstract: The present invention provides the photocatalyst sheet and the methods of welding and manufacturing the same, by which the substrate and resin of the photocatalyst-containing layer are not decomposed by photocatalyst particles, mutual welding of sheets is easy, and the photo-redox effect of a photocatalyst can be obtained. A photocatalyst sheet (1b) comprises a substrate (2) such as fiber and coated layers (3) on both sides of the substrate (2), and the coated layer (3) constitutes the photocatalyst-containing layer in which apatite-coated photocatalyst particles (4) are dispersed and fixed with resin. Here, the coated photocatalyst particles (4) on the surface of the photocatalyst-containing layer are so fixed as to have the parts exposed from the surface of the photocatalyst-containing layer.
    Type: Application
    Filed: December 10, 2004
    Publication date: June 28, 2007
    Applicant: Taiyo Kogyo Corporation
    Inventors: Hiroshi Toyoda, Kazuhiro Abe, Takayuki Nakata
  • Publication number: 20060234024
    Abstract: The present invention provides a new photocatalyst sheet in which the substrates coated with fluorocarbon resin are readily weldable mutually, and also of the high antifouling and water-repellant property by coating the outermost surface of film/fabric structure with fluorocarbon resin containing a photocatalyst and a photocatalyst sheet comprises a substrate (2), a first fluorocarbon resin layer (3) coated on said substrate (2), a second fluorocarbon resin layer (4) coated on said first fluorocarbon resin layer (3), and a third fluorocarbon resin layer (5) containing photocatalyst coated on said second fluorocarbon resin layer (4). The melting point of the first fluorocarbon resin layer (3) may be higher than the melting points of the second and the third fluorocarbon resin layers (4), (5).
    Type: Application
    Filed: July 2, 2004
    Publication date: October 19, 2006
    Applicant: Taiyo Kogyo Corporation
    Inventors: Kazuhiro Abe, Hiroshi Toyoda, Takayuki Nakata, Eiichi Okamoto, Akira Fujishima, Kazuhito Hashimoto