Patents by Inventor Hiroaki Iwashita

Hiroaki Iwashita 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: 20210011143
    Abstract: A distance measurement system includes communication units arranged in a communication subject. The communication units form different radio wave transmission paths in accordance with a location of a communication device, and are configured such that when one of the radio wave transmission paths is blocked, communication with the communication device is enabled by another one of the radio wave transmission paths. The distance measurement system further includes a distance measurement unit that measures the distance between the communication device and the communication subject using one of the radio wave transmission paths by performing distance measurement communication that transfers a distance measurement signal between the communication units and the communication device.
    Type: Application
    Filed: February 28, 2019
    Publication date: January 14, 2021
    Applicant: KABUSHIKI KAISHA TOKAI RIKA DENKI SEISAKUSHO
    Inventors: Kazuki NAIKI, Hiroaki IWASHITA, Satoshi MORI, Kenichi KOGA, Yoshiyuki OYA, Masateru FURUTA, Masanori KOSUGI
  • Publication number: 20210004698
    Abstract: A non-transitory computer-readable recording medium stores therein a prediction program that causes a computer to execute a process including receiving input data to be predicted, generating a tree structure data based on a plurality of pieces of rule information each indicated by an association of a combination of attribute values of a plurality of attributes with a label according to a predetermined order condition for the plurality of attributes, the tree structure data being obtained by aggregating the plurality of pieces of rule information, the tree structure data including an attribute value as a branch, and determining a degree of contribution to make a determination result on a predetermined value of a predetermined attribute reach a predetermined label based on a likelihood of obtaining a value of the predetermined label as the determination result, when the attribute value of the predetermined attribute is determined to be the predetermined value.
    Type: Application
    Filed: June 17, 2020
    Publication date: January 7, 2021
    Applicant: FUJITSU LIMITED
    Inventors: Takuya Takagi, Hiroaki Iwashita, Keisuke Goto, Kotaro Ohori
  • Publication number: 20210004697
    Abstract: A non-transitory computer-readable recording medium stores therein a predicting program that causes a computer to execute: receiving input data to be subjected to prediction; and generating, from training data sets each having explanatory variables and an objective variable, a prediction result, by using a hypothesis set and respective weights of hypotheses included in the hypothesis set, the hypotheses each being formed of a combination of the explanatory variables, classifying any of the training data sets and satisfying a specific condition, the weights being learnt based on whether each of the hypotheses holds true for each of the training data sets. The generating includes determining a value of a variable included in a pseudo-Boolean function such that a probability satisfies a predetermined standard, the probability being a probability that the prediction result satisfies the specific condition, the pseudo-Boolean function including variables corresponding to the explanatory variables.
    Type: Application
    Filed: June 12, 2020
    Publication date: January 7, 2021
    Applicant: FUJITSU LIMITED
    Inventors: Hiroaki Iwashita, Takuya Takagi, Keisuke GOTO, Kotaro Ohori
  • Publication number: 20200374122
    Abstract: An authentication system includes an authentication unit that performs an authentication process between a first communication device and a second communication device when the first communication device and the second communication device communicate. The authentication unit performs the authentication process by transmitting authentication information from one of the first communication device and the second communication device to the other one, calculating the authentication information with an encryption code in each of the first communication device and the second communication device, and evaluating a calculation result. During a processing series in the authentication process, the authentication unit performs a first authentication based on part of the calculation result transmitted between the first and second communication device, and a second authentication based on another part of the calculation result transmitted between the first and second communication device.
    Type: Application
    Filed: February 28, 2019
    Publication date: November 26, 2020
    Applicant: KABUSHIKI KAISHA TOKAI RIKA DENKI SEISAKUSHO
    Inventors: Kazuki NAIKI, Hiroaki IWASHITA, Kenichi KOGA, Yoshiyuki OYA, Yoshiki OISHI
  • Patent number: 10773171
    Abstract: A non-transitory computer-readable recording medium stores therein a matching program that causes a computer to execute a process including: determining subgame perfect equilibrium of a game in extensive form corresponding to the matching, the game in extensive form having a structure in which a plurality of independent players have respective gains corresponding to respective preferences of the respective applicants, and have the ranks of priority associated with order of play, and each of the players recognizes the gains of all the players; performing matching based on results of the subgame perfect equilibrium; setting the gain of a player corresponding to a coupling-requesting applicant having a coupling request requesting matching as a group with another specific applicant, in accordance with whether the coupling request is satisfied; and determining whether to prune options in a move of the player corresponding to the coupling-requesting applicant.
    Type: Grant
    Filed: February 15, 2018
    Date of Patent: September 15, 2020
    Assignees: FUJITSU LIMITED, KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION
    Inventors: Hiroaki Iwashita, Kotaro Ohori, Naoyuki Kamiyama, Akifumi Kira
  • Publication number: 20200279141
    Abstract: A non-transitory computer-readable recording medium stores therein an extraction program that causes a computer to execute a process including: generating a plurality of combinations of conditions relating to a plurality of item values included in data; calculating an index value that indicates a degree of cooccurrence between a specified response variable and each of the plurality of combinations, by using a machine learning model that estimates a response variable from the plurality of item values, the machine learning model having been trained by using the data; and extracting a specific combination from among the plurality of combinations based on any one of the condition and the index value.
    Type: Application
    Filed: February 25, 2020
    Publication date: September 3, 2020
    Applicant: FUJITSU LIMITED
    Inventors: Tatsuya Asai, Keisuke GOTO, Hiroaki Iwashita, Kotaro Ohori
  • Publication number: 20200279178
    Abstract: A non-transitory computer-readable recording medium stores therein an allocation program that causes a computer to execute a process including: performing, by using a part of data including an objective variable and one or more explanatory variables corresponding to the objective variable as training data, training of a model that predicts the objective variable from the explanatory variables of the data; classifying test data obtained by excluding the training data from the data into a group according to a classification condition regarding at least a part of the explanatory variables of the data; predicting the objective variable from the explanatory variables of the test data using the trained model for each of groups by which classification has been performed at the classifying; and calculating a predetermined resource amount to be allocated to each of the groups based on the objective variable for each of the groups predicted at the predicting.
    Type: Application
    Filed: February 20, 2020
    Publication date: September 3, 2020
    Applicant: FUJITSU LIMITED
    Inventors: Keisuke GOTO, Tatsuya Asai, Hiroaki Iwashita, Kotaro Ohori, YOSHINOBU SHIOTA
  • Publication number: 20200090064
    Abstract: A non-transitory computer-readable recording medium has stored therein a program that causes a computer to execute a process including: generating, from pieces of training data each including explanatory variables and an objective variable, a hypothesis set in which a plurality of hypotheses meeting a specific condition, each of the plurality of hypotheses being a combination of the explanatory variables, each of the pieces of training data being classified into any of the plurality of hypotheses; and performing a machine learning process to calculate a weight of each of the plurality of hypotheses included in the hypothesis set on a basis of whether each of the plurality of hypotheses includes each of the pieces of training data.
    Type: Application
    Filed: September 10, 2019
    Publication date: March 19, 2020
    Applicant: FUJITSU LIMITED
    Inventor: Hiroaki Iwashita
  • Publication number: 20200090076
    Abstract: A learning device creates a plurality of decision trees, using pieces of training data respectively including an explanatory variable and an objective variable, which are configured by a combination of the explanatory variables and respectively estimate the objective variable based on true or false of the explanatory variables. The learning device creates a linear model that is equivalent to the plurality of decision trees, and lists all terms configured by a combination of the explanatory variables without omission. The learning device outputs a prediction result by using the linear model from input data.
    Type: Application
    Filed: August 29, 2019
    Publication date: March 19, 2020
    Applicant: FUJITSU LIMITED
    Inventors: Takashi KATOH, Hiroaki Iwashita, Kotaro Ohori, Tatsuya Asai, Hikaru Yokono
  • Patent number: 10546256
    Abstract: In a security plan support method, a computer calculates an expected value of a loss that will be incurred when an intruder reaches a target with respect to each of a plurality of targets that are targets for the intruder in a route graph that depicts movement routes within the security area; specifies a security line that crosses the minimum number of edges of the route graph in the case of separating a target that has the greatest expected value of the loss from positions that is an intrusion position or positions of the intruder in the route graph; and calculates a security probability which minimizes the probability of the intruder intruding into the target side of the security line according to the route graph, the security line, and the number of the security guards.
    Type: Grant
    Filed: December 14, 2015
    Date of Patent: January 28, 2020
    Assignee: FUJITSU LIMITED
    Inventor: Hiroaki Iwashita
  • Patent number: 10493953
    Abstract: A car sharing system includes a car sharing device installed in a vehicle. The car sharing device is configured to perform ID verification via an electronic key system of the vehicle in a state in which key information registered to the mobile terminal has been authenticated to allow an onboard device to be operated by the mobile terminal. The car sharing system includes a key function unit that implements a smart function to perform the ID verification through bidirectional short-range wireless communication with the electronic key system, a determination processing unit that determines whether or not a condition for permitting actuation of the smart function has been satisfied, and an actuation switching unit that validates the smart function if the condition for permitting actuation of the smart function has been satisfied.
    Type: Grant
    Filed: June 26, 2018
    Date of Patent: December 3, 2019
    Assignee: KABUSHIKI KAISHA TOKAI RIKA DENKI SEISAKUSHO
    Inventors: Masahiro Arakawa, Masahiko Oya, Masaki Oshima, Kiyotoshi Sekine, Yutaka Kubo, Hiroaki Iwashita
  • Publication number: 20190256047
    Abstract: An electronic key system determines that legitimate communication has been performed on the basis of conditions including that a measured distance from a ranging request unit to a ranging response unit measured on the basis of a ranging request signal and a ranging response signal is within a threshold range that is set on the basis of the distance from a communication area of a transmission antenna where an electronic key is determined to be located by a key location determination unit to one of either the ranging request unit or the ranging response unit that is provided in an on-board device.
    Type: Application
    Filed: October 25, 2017
    Publication date: August 22, 2019
    Applicant: KABUSHIKI KAISHA TOKAI RIKA DENKI SEISAKUSHO
    Inventors: Hiroaki IWASHITA, Yoshiyuki OYA, Kazuki NAIKI
  • Patent number: 10315623
    Abstract: A portable electronic key device starts up only when movement of the portable electronic key device is present on the basis of detection signal Sac of a motion detector. A communication monitoring unit monitors whether or not radio waves Swk periodically transmitted from a vehicle are received. When there is no movement of the portable electronic key device but the portable electronic key device has received or is receiving radio waves from the vehicle, an operation controller maintains the start-up state of the portable electronic key device.
    Type: Grant
    Filed: June 20, 2016
    Date of Patent: June 11, 2019
    Assignee: KABUSHIKI KAISHA TOKAI RIKA DENKI SEISAKUSHO
    Inventor: Hiroaki Iwashita
  • Publication number: 20190001925
    Abstract: A car sharing system includes a car sharing device installed in a vehicle. The car sharing device is configured to perform ID verification via an electronic key system of the vehicle in a state in which key information registered to the mobile terminal has been authenticated to allow an onboard device to be operated by the mobile terminal. The car sharing system includes a key function unit that implements a smart function to perform the ID verification through bidirectional short-range wireless communication with the electronic key system, a determination processing unit that determines whether or not a condition for permitting actuation of the smart function has been satisfied, and an actuation switching unit that validates the smart function if the condition for permitting actuation of the smart function has been satisfied.
    Type: Application
    Filed: June 26, 2018
    Publication date: January 3, 2019
    Applicant: KABUSHIKI KAISHA TOKAI RIKA DENKI SEISAKUSHO
    Inventors: Masahiro ARAKAWA, Masahiko OYA, Masaki OSHIMA, Kiyotoshi SEKINE, Yutaka KUBO, Hiroaki IWASHITA
  • Publication number: 20180240177
    Abstract: A non-transitory computer-readable recording medium stores therein a matching program that matches a plurality of applicants with matching priorities and a plurality of targets, the matching program causing a computer to execute a process including: setting matching type for each coupling-request applicant with first matching type or second matching type, the coupling request applicant requesting a specific applicant and the coupling-request applicant be matched with a same target, the first matching type performing matching of the coupling-request applicant collectively with the specific applicant, the second matching type performing matching of the coupling-request applicant separately from the specific applicant; and performing and repeating matching the plurality of applicants and the plurality of targets utilizing the matching priorities of the plurality of applicants and the matching type of the coupling-request applicant, until there are no coupling-request applicants with the first matching type whose
    Type: Application
    Filed: February 15, 2018
    Publication date: August 23, 2018
    Applicants: FUJITSU LIMITED, KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION
    Inventors: Hiroaki Iwashita, Kotaro Ohori, Naoyuki Kamiyama, Akifumi Kira
  • Publication number: 20180236358
    Abstract: A non-transitory computer-readable recording medium stores therein a matching program that causes a computer to execute a process including: determining subgame perfect equilibrium of a game in extensive form corresponding to the matching, the game in extensive form having a structure in which a plurality of independent players have respective gains corresponding to respective preferences of the respective applicants, and have the ranks of priority associated with order of play, and each of the players recognizes the gains of all the players; performing matching based on results of the subgame perfect equilibrium; setting the gain of a player corresponding to a coupling-requesting applicant having a coupling request requesting matching as a group with another specific applicant, in accordance with whether the coupling request is satisfied; and determining whether to prune options in a move of the player corresponding to the coupling-requesting applicant.
    Type: Application
    Filed: February 15, 2018
    Publication date: August 23, 2018
    Applicants: FUJITSU LIMITED, KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION
    Inventors: Hiroaki IWASHITA, Kotaro OHORI, Naoyuki KAMIYAMA, Akifumi KIRA
  • Publication number: 20180170313
    Abstract: A portable electronic key device starts up only when movement of the portable electronic key device is present on the basis of detection signal Sac of a motion detector. A communication monitoring unit monitors whether or not radio waves Swk periodically transmitted from a vehicle are received. When there is no movement of the portable electronic key device but the portable electronic key device has received or is receiving radio waves from the vehicle, an operation controller maintains the start-up state of the portable electronic key device.
    Type: Application
    Filed: June 20, 2016
    Publication date: June 21, 2018
    Applicant: KABUSHIKI KAISHA TOKAI RIKA DENKI SEISAKUSHO
    Inventor: Hiroaki IWASHITA
  • Patent number: 9994193
    Abstract: This electronic key system includes: an electronic key which is enabled to engage in radio communication with a vehicle on condition that a vibration is detected by a vibration detection part; and the vehicle which has an on-board control part for starting an engine on condition that the radio communication with the electronic key is established, and a push switch installed in the vehicle is operated. The on-board control part causes the vehicle to be vibrated by the engine on condition that the push switch is operated.
    Type: Grant
    Filed: June 1, 2016
    Date of Patent: June 12, 2018
    Assignee: KABUSHIKI KAISHA TOKAI RIKA DENKI SEISAKUSHO
    Inventors: Hiroaki Iwashita, Kohei Kishimoto
  • Publication number: 20180111585
    Abstract: This electronic key system 1 includes: an electronic key which is enabled to engage in radio communication with a vehicle on condition that a vibration is detected by a vibration detection part; and the vehicle which has an on-board control part for starting an engine on condition that the radio communication with the electronic key is established, and a push switch installed in the vehicle is operated. The on-board control part causes the vehicle to be vibrated by the engine on condition that the push switch is operated.
    Type: Application
    Filed: June 1, 2016
    Publication date: April 26, 2018
    Applicant: KABUSHIKI KAISHA TOKAI RIKA DENKI SEISAKUSHO
    Inventors: Hiroaki IWASHITA, Kohei KISHIMOTO
  • Publication number: 20180101798
    Abstract: A non-transitory computer readable recording medium stores therein a risk evaluation program that causes a computer to execute a process including: calculating a recognized risk for each of a plurality of areas based on a security plan for the plurality of areas, the recognized risk being that an intruder is recognized by security resources at each of a plurality of calculation timings; and outputting the recognized risk with respect to each of the plurality of areas at each of the plurality of calculation timings, wherein the calculating for each of the plurality of calculation timings includes calculating the recognized risk with respect to each of the plurality of areas based on the recognized risk with respect to each of the plurality of areas at a previous timing, moving ability of the intruder, and the security plan.
    Type: Application
    Filed: October 5, 2017
    Publication date: April 12, 2018
    Applicants: FUJITSU LIMITED, KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION
    Inventors: Hiroaki IWASHITA, Kotaro Ohori, Naoyuki Kamiyama, Akifumi Kira