METHOD, APPARATUS AND COMPUTER PROGRAM FOR MEASURING AND ANALYSIS OF BLOOD PRESSURE USING PHOTOPLETHYSMOGRAPHY

    公开(公告)号:US20200375550A1

    公开(公告)日:2020-12-03

    申请号:US16885665

    申请日:2020-05-28

    Inventor: Young Suk SHIN

    Abstract: A method for measuring and analyzing blood pressure using PPG includes receiving, by a computer, a PPG signal from a finger of a subject, dividing, by the computer, a normalization pulse wave signal derived from the received PPG signal into one or more predetermined windows, extracting, by the computer, a maximum lower amplitude value from one of the respective divided windows, extracting, by the computer, a target feature pattern from the extracted maximum lower amplitude value, deriving, by the computer, a first target unique vector and a second target unique vector with respect to the target feature pattern, using a linear discriminant analysis (LDA) algorithm to display the first target unique vector and the second target unique vector of the target feature pattern on 2-dimensional (2D) graph, and providing, by the computer, a blood pressure state of the subject, using the 2D graph.

    METHOD AND APPARATUS FOR LOCATION ESTIMATION OF TERMINAL IN WIRELESS COMMUNICATION SYSTEM

    公开(公告)号:US20200209345A1

    公开(公告)日:2020-07-02

    申请号:US16665312

    申请日:2019-10-28

    Inventor: Suk Seung Hwang

    Abstract: Provided are a method and apparatus for location estimation of terminals in a wireless communication system. A method of operating a positioning apparatus may include (a) calculating distances between a terminal and first, second, and third base stations, (b) creating first, second, and third circles centered at locations of the first, second, and third base stations with radii corresponding to the distances, (c) calculating intersection distances between two intersections formed by the second circle, which is the smallest circle, and one of the first circle and the third circle and the other two intersections formed by the first circle and the third circle, and (d) determining one of the intersections corresponding to the shortest distance among the intersection distances as the terminal's location.

    Microwave reforming apparatus for gas reforming

    公开(公告)号:US10442689B2

    公开(公告)日:2019-10-15

    申请号:US15821568

    申请日:2017-11-22

    Inventor: Young-Nam Chun

    Abstract: The present disclosure relates to a microwave reforming apparatus for gas reforming, and provides a new technology of converting carbon dioxide which is a main greenhouse gas generated during combustion, pyrolysis/gasification, and operation of fossil fuels, methane, and dispersions thereof into high-quality fuels. A microwave reforming apparatus according to the present disclosure uses a carbon receptor and thus can solve the conventional problem of price of catalyst and also enables compactification of a device, rapid startup and response time in several seconds, and application of various kinds of product gases including polymer hydrocarbon. Also, the microwave reforming apparatus according to the present disclosure uses its own internal reaction heat at the time of reforming and thus can maintain the optimum operating conditions for a wide range of flow rate and gas properties. Therefore, it is possible to solve the conventional problem with the time required for normal operation and the efficiency of a reforming apparatus.

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