Hitachi, Ltd.

Hitachi Chemical Company, Ltd.

Saburo Yasukawa

Keisuke Nakashima

Yasuro Hori

Tatsuki Inuzuka

Masahiro Watanabe

Masahiko Amano

Yasuyuki Kozima

Masaharu Tadauchi

Minoru Kanoi

Toshifumi Yoshikawa

Motoo Yamaguchi

Toshio Shimizu

Tsutomu Tsukui

Norihira Uozumi

Ryota Doi

Takeo Yamagata

Yasuyuki Tsutsumi

Yuzuru Imamura

Shuzou Iwaasa

Shinji Tanifuji

Seiichiro Ono

In a control system for a power transmission and distribution system, a plurality of distributed power supplying and receiving units each including a control unit are provided and connected along a power distribution line. The power supplying and receiving unit function to generate active and reactive powers of fundamental and higher harmonic waves to supply and receive the same to and from the power distribution line. A first central control unit controls the power distribution line and is designed to store information relating to the configuration of the power distribution line, to collect information with regard to instant open and close conditions of respective disconnecting switches connected for sectioning the power distribution line, and with regard to current electrical quantities on the power distribution line. Individual control command signals specific to the respective power supplying and receiving units are produced based on the stored and collected information and the respective power supplying and receiving units are controlled so that a desired target condition of the power distribution line is achieved autonomously within the power distribution line through an optimum cooperation control of the units.

Control system for power transmission and distribution system

An image processing system which can learn user's preference to satisfy him to the full, and also comprises means for inquiring a user about his satisfication degree to enhance it. The image processing system comprises means for learning user's preference such as his manner of setting and pressing a button, a destination, a condition set for copying, and means for changing a control parameter on the basis of the learning result.

Image processing system suitable for use for a facsimile

A multi-color document reading apparatus used in a facsimile apparatus for reading a document disposed at a predetermined position containing pictures of multiple colors on a line-by-line basis while discriminately identifying the colors includes an image sensor for sensing optical images in a predetermined area including at least one line of the document disposed at the predetermined position, light sources for selectively illuminating at least the predetermined area in one of first and second energized states differing from each other in respect to the spectral characteristics thereof, a switch circuit for selectively energizing the light sources for illuminating the document in one of the first and second states, a distortion correcting circuit including memories for storing first and second shading waveforms derived from data sensed by the image sensor for optical images of a standard sheet of a specific color disposed at the predetermined position and illuminated by the light source in the first and second energized states, respectively, and a color separating circuit for identifying data of different colors of the multi-color pictures included in one line of the document for generating color-separated signals representing the different colors.

Multi-color document reading apparatus for facsimile and multi-color

A liquid fuel cell having a circulation system for a fuel mixture comprising fuel and water, which comprises a first tank containing water or a water-rich fuel mixture comprising water and fuel, a second tank containing fuel or a fuel-rich mixture comprising water and fuel, a first detector for detecting the liquid level of the fuel mixture in the circulation system, a second detector for detecting a fuel concentration of the fuel mixture in the circulation system, or an output from the fuel cell, or a load current of the fuel cell, a valve means for controlling flow of the water or the water-rich mixture in the first tank to the circulation system in accordance with the output from the first detector, and a valve means for controlling flow of the fuel or the fuel-rich mixture in the second tank to the circulation system in accordance with the output from the second detector, can be stably and efficiently operated for a prolonged time in spite of different consumption rates of fuel and water even if the load current or operating temperature of the fuel cell or the temperature or humidity of the atmosphere is changed.

Liquid fuel cell

A fuel cell comprises unit cells stacked through separators therebetween; each unit cell comprising a fuel electrode plate, an oxidizing agent electrode plate and a matrix between electrode plate and the oxidizing agent plate, U-shaped gas flow passages for the fuel electrode and for the oxidizing agent electrode are provided in a counter-current relation to each other with gas inlets and gas outlets for the fuel electrode and the gas inlets and the gas outlets for the oxidizing agent electrodes being provided at the opposite sides of the fuel cell, respectively, and communicated respectively with manifolds at the same opposite sides of the fuel cell. The fuel cell is simple in structure, highly reliable in fabrication, operation and maintenance, and high in gas utilization efficiency.

Fuel cell

Growing community of inventors

Katsuta, Japan

Saburo Yasukawa