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    6.
    发明专利
    未知

    公开(公告)号：DE3034559C2

    公开(公告)日：1989-09-28

    申请号：DE3034559

    申请日：1980-09-12

    Applicant: THE PRESIDENT OF TOKYO INSTITUTE OF TECHNOLOGY, TOKIO/TOKYO, JP

    Inventor： YAMAGUCHI, SHOICHIRO ,  KOBAYASHI, FUJIO, TOKIO/TOKYO, JP

    IPC: G06T11/00

    Abstract: A method of reconstructing a computed tomographic image comprising projecting X-rays through material to be tested at a plurality of spaced positions, and measuring the X-ray density values of the X-rays projected through the material along the distribution of projected X-rays. The spaced positions at which the X-ray density values are measured are selected such that the tomographic plane of the material to be reconstructed is represented by a pseudo-tomographic plane comprised of an array of n rows of m columns of picture elements, each having a single piece of X-ray density information, and such that each X-ray beam passes through the lower left corner of a corresponding picture element. The X-ray absorption coefficient for each picture element is calculated from the measured values of X-ray density, and the computed tomographic image is reconstructed by positioning picture elements having the computed X-ray absorption coefficients in an array corresponding to the array in the pseudo-tomographic plane.

    9.
    发明专利
    未知

    公开(公告)号：DE2211731C3

    公开(公告)日：1974-12-12

    申请号：DE2211731

    申请日：1972-03-10

    Applicant: PRESIDENT OF TOKYO INSTITUTE OF TECHNOLOGY, TOKIO

    Inventor： TAKAI, HIROYUKI, PROF., KAWASAKI ,  HASEGAWA, KENSUKE, YOKOHAMA ,  NAKANO, MICHIO, TOKIO

    IPC: H02P8/00 ,  H02P8/18 ,  H02P7/00

    Abstract: An electrical rotary machine comprising a stator and a rotor may be used as a step motor when the outputs of a digital phase modulator comprising a clock pulse generator and pulse number reducing circuits each comprising a chain of flip-flops connected in series are applied to the stator and the rotor windings through an inverter respectively to generate the rotating magnetic fields. In response to a number of rotation command pulses to be inserted in a clock pulse train from the clock pulse generator and to a manner by which the command pulses are inserted into the clock pulse train, a number of steps and the direction of rotation of the rotor can be controlled. The angle of rotation of the rotor in response to one command pulse may be varied by varying a number of series-connected flip-flops in the pulse number reducing circuit.

    10.
    发明专利
    未知

    公开(公告)号：DE2211745C3

    公开(公告)日：1974-06-20

    申请号：DE2211745

    申请日：1972-03-10

    Applicant: PRESIDENT OF TOKYO INSTITUTE OF TECHNOLOGY, TOKIO

    Inventor： OZAKI, ATSUMU, PROF., TOKIO ,  MIZOROKI, TSUTOMU, YOKOHAMA, KANAGAWA ,  MARUYA, KEN-ICHI, TOKIO

    IPC: C07C2/04 ,  C07C15/02 ,  C07C3/02

    Abstract: 1379476 3-Phenyl-1-butene TOKYO INSTITUTE OF TECHNOLOGY PRESIDENT OF 8 March 1972 [28 July 1971] 10691/72 Heading C5E 3-Phenyl-1-butene is prepared by reacting styrene and ethylene in the presence of a catalyst comprising a mixture of (i) boron trifluoride, chloride or bromide, and (ii) a # aryl Ni (II) halide of formula where R = aryl group linked to Ni by a # bond, # = ethyl or phenyl group, X = Cl, Br or I; the P and X atoms being linked to the Ni atom by co-ordinate bonds. R is preferably 2-tolyl, 1-naphthyl or mesityl. The boron compound is preferably boron trifluoride ethyl etherate.

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