Patents by Inventor Mikio Yoda

Mikio Yoda 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: 5943662
    Abstract: A method and a system for causing a neural circuit model to learn typical past control results of a process and using the neural circuit model for supporting an operation of the process. The neural circuit model is caused to learn by using, as input signals, a typical pattern of values of input variables at different points in time and, as a teacher signal, its corresponding values of the control variable. An unlearned pattern of input variables is inputted to the thus-learned neuron circuit model, whereby a corresponding value of the control variable is determined. Preferably, plural patterns at given time intervals can be simultaneously used as patterns to be learned.
    Type: Grant
    Filed: March 31, 1994
    Date of Patent: August 24, 1999
    Assignee: Hitachi, Ltd.
    Inventors: Kenji Baba, Ichiro Enbutsu, Shoji Watanabe, Hayao Yahagi, Fumio Maruhashi, Harumi Matsuzaki, Hiroshi Matsumoto, Shunsuke Nogita, Mikio Yoda, Naoki Hara
  • Patent number: 5845052
    Abstract: A method for causing a neural circuit model to learn typical past control results of a process and using the neural circuit model for supporting an operation of the process. The neural circuit model is caused to learn by using, as input signals, a typical pattern of values of input variables at different points in time and, as a teacher signal, its corresponding values of the control variable. An unlearned pattern of input variables is inputted to the thus-learned neuron circuit model, whereby a corresponding value of the control variable is determined. Preferably, plural patterns at given time intervals can be simultaneously used as patterns to be learned.
    Type: Grant
    Filed: January 2, 1996
    Date of Patent: December 1, 1998
    Assignee: Hitachi, Ltd.
    Inventors: Kenji Baba, Ichiro Enbutsu, Shoji Watanabe, Hayao Yahagi, Fumio Maruhashi, Harumi Matsuzaki, Hiroshi Matsumoto, Shunsuke Nogita, Mikio Yoda, Naoki Hara
  • Patent number: 5774633
    Abstract: A method and a system for causing a neural circuit model to learn typical past control results of a process and using the neural circuit model for supporting an operation of the process. The neural circuit model is caused to learn by using, as input signals, a typical pattern of values of input variables at different points in time and, as a teacher signal, its corresponding values of the control variable. An unlearned pattern of input variables is inputted to the thus-learned neuron circuit model, whereby a corresponding value of the control variable is determined. Preferably, plural patterns at given time intervals can be simultaneously used as patterns to be learned.
    Type: Grant
    Filed: December 23, 1991
    Date of Patent: June 30, 1998
    Assignee: Hitachi, Ltd.
    Inventors: Kenji Baba, Ichiro Enbutsu, Shoji Watanabe, Hayao Yahagi, Fumio Maruhashi, Harumi Matsuzaki, Hiroshi Matsumoto, Shunsuke Nogita, Mikio Yoda, Naoki Hara
  • Patent number: 5708195
    Abstract: A pipeline breakage sensing system includes a plurality of pressure sensors installed on pipelines to measure pressure of a fluid. Each of these pressure sensors presumes a breakage location in cooperation with other neighboring sensors on the basis of a pressure change of the fluid and transmits information relating to the presumed breakage location. The pipeline breakage sensing system further includes a pressure sensor for detecting the occurrence of a seismic earthquake event, in addition to a managing center for sensing a breakage location on the basis of information transmitted from respective pressure sensors and by calculating a time correlated comparison between the superimposed pressure readings from neighboring pressure sensors used to detect the occurrence of such a fluid pressure change.
    Type: Grant
    Filed: July 3, 1996
    Date of Patent: January 13, 1998
    Assignee: Hitachi, Ltd.
    Inventors: Hiromitsu Kurisu, Teruji Sekozawa, Shigeyuki Shimauchi, Mikio Yoda
  • Patent number: 5682466
    Abstract: An information processing apparatus, which is easy to design and has functions of high speed processing, learning, and so on, includes a plurality of memories for storing sets of previously known input data (called response pattern data) and correct output data corresponding thereto; a comparator for providing input data supplied in actual operations to the plurality of sets and comparing the input data with the response pattern data in each set; an evaluation unit for evaluating the distance (degree of similarity) between the input data and the response pattern data; and a generator for generating final outputs by composing the evaluation result for each set and the output data in that set, for example, using a method which calculates weighted average values based on the evaluated distances.
    Type: Grant
    Filed: September 8, 1993
    Date of Patent: October 28, 1997
    Assignee: Hitachi, Ltd.
    Inventors: Akira Maeda, Motohisa Funabashi, Hiromasa Yamaoka, Nobuyuki Fujikura, Mikio Yoda, Mitsuo Yanagi
  • Patent number: 5638492
    Abstract: An information processing apparatus is capable of achieving high-level functions such as high-speed processing and learning without requiring a complex algorithm based on, for example, knowledge processing. A plurality of sets of known input data and correct output data corresponding thereto are beforehand stored. The stored input data is called response pattern data. Data actually inputted in the system operation is supplied to the plural sets of data. For each set of data, the input data is compared with the response pattern data to evaluate a distance (degree of similarity) therebetween. Results of evaluations for the respective sets of data are combined with the associated output data, for example, according to weighted average values on the basis of the evaluated distance, thereby generating final outputs.
    Type: Grant
    Filed: August 17, 1994
    Date of Patent: June 10, 1997
    Assignee: Hitachi, Ltd.
    Inventors: Akira Maeda, Motohisa Funabashi, Hiromasa Yamaoka, Nobuyuki Fujikura, Mikio Yoda, Mitsuo Yanagi, Toshihide Ichimori
  • Patent number: 5581459
    Abstract: When amounts of operation control variables and/or operation state evaluation variables of a plant are calculated through a multilayered neural network based on data indicating a plant state, and the calculated results are indicated to an operator, a plant operation support system has functions to analyze an internal causality between neurons in the neural network, and display quantitative guidance by association in the neural network and also the analyzed result of the internal causality between the neurons as an association reason.
    Type: Grant
    Filed: September 26, 1991
    Date of Patent: December 3, 1996
    Assignee: Hitachi, Ltd.
    Inventors: Ichiro Enbutsu, Kenji Baba, Shoji Watanabe, Hayao Yahagi, Naoki Hara, Mikio Yoda
  • Patent number: 5505843
    Abstract: In a water supply plant which cleans water taken in from such sources of intake water as lakes and marshes, dams, rivers and so on and delivers the water as city water, obstructions to water treatment is predicted and methods for preventing the obstruction are decided, by measuring kinds and quantity of plankton and comparing the measured data with rules representing relations among kinds and quality of plankton, obstructions to water treatment and counteractions to such obstructions stored in a rule base in advance.
    Type: Grant
    Filed: June 21, 1994
    Date of Patent: April 9, 1996
    Assignee: Hitachi, Ltd.
    Inventors: Misako Obuchi, Shoji Watanabe, Mikio Yoda, Naoki Hara, Bunchi Kimura, Hayao Yahagi
  • Patent number: 5465320
    Abstract: In order to speed up and simplify automated learning of rules by a neural network making use of fuzzy logic, data from a system is analyzed by a teaching data creation means which groups the data into clusters and then selects a representative data item from each group for subsequent analysis. The selected data items are passed to a rule extraction means which investigates relationships between the data items, to derive rules, but eliminates rules which have only an insignificant effect on the system. The results are candidate rules which are stored in a first rule base. The candidate rules are then compared with rules in a second rule base to check for duplication and/or contradiction. Only those rules which are not duplicated and not contradictory are stored in the second rule base. Hence, when fuzzy inference is used to control the system on the basis of rules in the second rule base, only valid rules which provide a significant effect on the system are used.
    Type: Grant
    Filed: July 2, 1992
    Date of Patent: November 7, 1995
    Assignee: Hitachi, Ltd.
    Inventors: Ichiro Enbutsu, Kenzi Baba, Naoki Hara, Mikio Yoda, Shoji Watanabe, Hayao Yahagi
  • Patent number: 5454073
    Abstract: A drawing management device for managing the drawing of an entire facility, such as a water supply facility, as digital information. This device includes a unit for storing drawings with priorities obtained by separating the entire facility drawing into sub-facility drawings located at plural levels, a selective display designating unit for displaying a desired sub-facility drawing obtained by selecting the number of levels considering the priority from the storing unit, and a display unit for displaying the desired sub-facility drawing in response to the signal from the selective display designating unit. By suitably selecting a desired level considering the priority, only a necessary and sufficient facility drawing can be displayed swiftly.
    Type: Grant
    Filed: November 29, 1991
    Date of Patent: September 26, 1995
    Assignee: Hitachi, Ltd.
    Inventors: Manabu Fukushima, Mikio Yoda, Kazuo Tsutsui
  • Patent number: 5324431
    Abstract: Suspended substances, such as active sludge, in a liquor is treated in an apparatus for treating the liquor by predicting a suspension state on the basis of an amount of existing suspended substances in the liquor.
    Type: Grant
    Filed: August 24, 1990
    Date of Patent: June 28, 1994
    Assignee: Hitachi, Ltd.
    Inventors: Shoji Watanabe, Kenji Baba, Ichiro Enbutsu, Hayao Yahagi, Harumi Matsuzaki, Mikio Yoda, Naoki Hara, Yoshikatsu Asada
  • Patent number: 5265222
    Abstract: A symbolization apparatus which includes a membership function memory unit for storing a membership function used in fuzzy logic processing. In the symbolization apparatus a process condition change pattern is converted into an ambiguous symbol in order to build up a system capable of effecting an inference and decision approximate to a skilled operator against an object process. A process condition value memory is disclosed for holding a measurement of the process condition value and a process operation amount, a control history memory unit for storing operations and values converted into symbolic expressions, control units and a knowledge base for storing the information relating to the casual relations between the process control values and the process conditions. The process control system and a control support system comprise the function of condition identification approximate to that of a skilled operator by the use of the symbolization apparatus.
    Type: Grant
    Filed: November 23, 1990
    Date of Patent: November 23, 1993
    Assignee: Hitachi, Ltd.
    Inventors: Takushi Nishiya, Motohisa Funabashi, Hiromitsu Kurisu, Mikio Yoda, Kazuo Kera
  • Patent number: 5175797
    Abstract: A method and apparatus of a learning type decision support system are provided for improved acquisition of a priori knowledge from the system object and expression of non-linear structures in the object. The system is comprised of a learning module and an executing module for outputting advice and process manipulate command values to system users by receiving input data comprising on-line data and file data.
    Type: Grant
    Filed: August 31, 1990
    Date of Patent: December 29, 1992
    Assignee: Hitachi, Ltd.
    Inventors: Motohisa Funabashi, Takushi Nishiya, Masahiro Oba, Mikio Yoda, Kazuo Kera, Kiyomi Mori
  • Patent number: 4888703
    Abstract: A fish is bred in a transparent basin, into which water to be tested is supplied. A light source and a television camera are arranged in such a manner that images of the fish are taken by the camera as a silhouette. From the thus obtained fish images, the frequency distribution of the gravity centers of the fish images in the direction of the depth of water are obtained. The abnormality of the behavior of the fish is detected by comparison of the obtained frequency distribution with a reference distribution provided in advance.
    Type: Grant
    Filed: September 4, 1987
    Date of Patent: December 19, 1989
    Assignees: Hitachi Engineering Co., Ltd., Hitachi, Ltd.
    Inventors: Kenji Baba, Hayao Yahagi, Shoji Watanabe, Naoki Hara, Mikio Yoda, Shunji Mori, Takashi Iida, Takashi Katori, Masahiko Ishida
  • Patent number: 4783269
    Abstract: An injection control system of a flocculating agent comprises: a flocculating pool into which the inflow liquid flocculating agent is injected and which forms flocs of suspended matters in the liquid; flocculating agent injecting means for injecting the flocculating agent into the flocculating pool; floc image pickup means for photographing a state of the flocs in the flocculating pool and for converting luminance data of the flocs into an electric signal; image recognizing means for recognizing the shape of floc by binarizing the image signal derived from the floc image pickup means on the basis of a luminance level of each pixel; flocculation state deciding means for calculating a characteristic amount of a diameter distribution of the flocs on the basis of the floc shapes recognized by the image recognizing means; and injection amount control means for controlling an amount of the flocculating agent which is injected from the flocculating agent injecting means on the basis of the characteristic amount.
    Type: Grant
    Filed: April 10, 1987
    Date of Patent: November 8, 1988
    Assignee: Hitachi, Ltd.
    Inventors: Kenji Baba, Shoji Watanabe, Naoki Hara, Mikio Yoda, Shunji Mori, Shunsuke Nogita, Yuzi Yamasawa, Toshimitu Akiyama
  • Patent number: 4769776
    Abstract: The image of microorganisms contained in a sludge of an aeration tank is picked up by an image pickup device having the function of magnifying and picking up microorganism images. Binarizing processing is then made to obtain a binarized image from the resulting gray image, and the binarized image is subjected to thinning processing. The number of pixels of the image left after often the thinning processing is counted to measure the amount of filamentous microorganisms. In this manner, the amount of the filamentous microorganisms can be measured accurately irrespective of their thickness.
    Type: Grant
    Filed: August 26, 1986
    Date of Patent: September 6, 1988
    Assignee: Hitachi, Ltd.
    Inventors: Masakatsu Hiraoka, Kazushi Tsumura, Kenji Baba, Shoji Watanabe, Mikio Yoda, Naoki Hara
  • Patent number: 4654139
    Abstract: The fluidizing speed of water inside a flocculation basin of a water treatment process plant is adjusted in accordance with the state of flocculation inside the flocculation basin. The state of flocculation is determined by taking a plurality of pictures within a predetermined period by an ITV disposed inside the basin, recognizing a sufficiently large number of flocs from the pictures thus taken, calculating the particle diameters of the flocs and determining the particle diameter distribution from the result of calculation. The judgement signal is used as a signal for adjusting the water fluidizing speed.
    Type: Grant
    Filed: June 7, 1985
    Date of Patent: March 31, 1987
    Assignee: Hitachi, Ltd.
    Inventors: Kenji Baba, Shoji Watanabe, Shunsuke Nogita, Mikio Yoda, Akihiro Tanaka, Shunji Mori
  • Patent number: RE42414
    Abstract: A drawing management device for managing the drawing of an entire facility, such as a water supply facility, as digital information. This device includes a unit for storing drawings with priorities obtained by separating the entire facility drawing into sub-facility drawings located at plural levels, a selective display designating unit for displaying a desired sub-facility drawing obtained by selecting the number of levels considering the priority from the storing unit, and a display unit for displaying the desired sub-facility drawing in response to the signal from the selective display designating unit. By suitably selecting a desired level considering the priority, only a necessary and sufficient facility drawing can be displayed swiftly.
    Type: Grant
    Filed: September 25, 1997
    Date of Patent: May 31, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Manabu Fukushima, Mikio Yoda, Kazuo Tsutsui