Patents by Inventor Wenxi Chen

Wenxi Chen 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: 20250070066
    Abstract: In certain aspects, a memory device includes a memory structure including memory strings, a first peripheral circuit coupled to the memory structure and including a first transistor including a first gate dielectric layer, a first semiconductor layer in contact with the first transistor, a second peripheral circuit coupled to the memory structure and including a second transistor including a second gate dielectric layer, and a second semiconductor layer in contact with the second transistor. The memory strings are between the first semiconductor layer and the second semiconductor layer in a first direction. A thickness of the first gate dielectric layer is greater than a thickness of the second gate dielectric layer in the first direction.
    Type: Application
    Filed: November 11, 2024
    Publication date: February 27, 2025
    Inventors: Yanhong Wang, Wei Liu, Liang Chen, Zhiliang Xia, Wenxi Zhou, Kun Zhang, Yuancheng Yang
  • Patent number: 11500975
    Abstract: An authentication method comprising creating electrocardiogram data of users; calculating a similarity between electrocardiogram data of each user and template data created by averaging electrocardiogram data of each user; creating and training a first NNmodel for every user by using similarities between electrocardiogram data of a user and template data of the same user and similarities between electrocardiogram data of a user and template data of another user, and creating and training second NNmodels for users by using similarities between electrocardiogram data of a user and template data of the user and similarities between electrocardiogram data of the user and template data of another user; and executing a first step in which the similarities calculated using electrocardiogram data for authentication of a user to be authenticated and template data are input to the first NNmodel, and executing a second step in which the similarities are input to the second NNmodels.
    Type: Grant
    Filed: December 23, 2019
    Date of Patent: November 15, 2022
    Assignees: THE PUBLIC UNIVERSITY CORPORATION, THE UNIVERSITY OF AIZU, SIMPLEX QUANTUM INC.
    Inventors: Wenxi Chen, Ying Chen, Yuji Hamada
  • Publication number: 20200134152
    Abstract: An authentication method comprising creating electrocardiogram data of users; calculating a similarity between electrocardiogram data of each user and template data created by averaging electrocardiogram data of each user; creating and training a first NNmodel for every user by using similarities between electrocardiogram data of a user and template data of the same user and similarities between electrocardiogram data of a user and template data of another user, and creating and training second NNmodels for users by using similarities between electrocardiogram data of a user and template data of the user and similarities between electrocardiogram data of the user and template data of another user; and executing a first step in which the similarities calculated using electrocardiogram data for authentication of a user to be authenticated and template data are input to the first NNmodel, and executing a second step in which the similarities are input to the second NNmodels.
    Type: Application
    Filed: December 23, 2019
    Publication date: April 30, 2020
    Inventors: Wenxi CHEN, Ying CHEN, Yuji HAMADA
  • Patent number: 6241682
    Abstract: A pacing-pulse detecting circuit 3 detects pacing pulses from an electrocardiogram signal led from an electrocardiogram electrode 1. A mode-status judging means 21 judges a mode status, a pacing mode or a nonpacing mode, on the basis of the pacing pulse detected. The detect result is transmitted to a CPU 5. The CPU 5 causes a display device 10 to display the result. An operator sees the display and operates a key 22, and gives an instruction to start a blood pressure measurement to the CPU 5. The CPU 5 drives a pump 13 and an exhaust valve 14 to supply and discharge air to and from a cuff 11, and measures a blood pressure by use of pressure data led from a pressure sensor 15.
    Type: Grant
    Filed: August 16, 2000
    Date of Patent: June 5, 2001
    Assignee: Nihon Kohden Corporation
    Inventors: Ryoichi Ochiai, Yoshihiro Sugo, Takeshi Sohma, Rie Tanaka, Wenxi Chen
  • Patent number: 6129677
    Abstract: An apparatus for non-invasion heart monitoring includes electrocardiogram measuring means (1) for measuring electrocardiograms, pulse wave measuring means (2) for measuring pulse waves, and a CPU (30) for processing electrocardiogram signals derived from the electrocardiogram measuring means (1) and pulse wave signals derived from the pulse-wave measuring means (2). The CPU (30) detects the amplitudes of the pulse waves corresponding to the R waves of the cardiogram and the pulse wave propagation times, and computes a ratio (Nr/N) of the heart rate N and the heart rate Nr exclusive of the heart beats of wave deficits.
    Type: Grant
    Filed: August 10, 1998
    Date of Patent: October 10, 2000
    Assignee: Nihon Kohden Corporation
    Inventors: Takeshi Sohma, Yoshihiro Sugo, Rie Tanaka, Wenxi Chen, Hiromitsu Kasuya, Kohei Ono
  • Patent number: 6122543
    Abstract: A pacing-pulse detecting circuit 3 detects pacing pulses from an electrocardiogram signal led from an electrocardiogram electrode 1. A mode-status judging means 21 judges a mode status, a pacing mode or a nonpacing mode, on the basis of the pacing pulse detected. The detect result is transmitted to a CPU 5. The CPU 5 causes a display device 10 to display the result. An operator sees the display and operates a key 22, and gives an instruction to start a blood pressure measurement to the CPU 5. The CPU 5 drives a pump 13 and an exhaust valve 14 to supply and discharge air to and from a cuff 11, and measures a blood pressure by use of pressure data led from a pressure sensor 15.
    Type: Grant
    Filed: February 17, 2000
    Date of Patent: September 19, 2000
    Assignee: Nihon Kohden Corporation
    Inventors: Ryoichi Ochiai, Yoshihiro Sugo, Takeshi Sohma, Rie Tanaka, Wenxi Chen
  • Patent number: 6049731
    Abstract: A pacing-pulse detecting circuit 3 detects pacing pulses from an electrocardiogram signal led from an electrocardiogram electrode 1. A mode-status judging means 21 judges a mode status, a pacing mode or a nonpacing mode, on the basis of the pacing pulse detected. The detect result is transmitted to a CPU 5. The CPU causes a display device 10 to display the result. An operator sees the display and operates a key 22, and gives an instruction to start a blood pressure measurement to the CPU 5. The CPU 5 drives a pump 13 and an exhaust valve 14 to supply and discharge air to and from a cuff 11, and measures a blood pressure by use of pressure data led from a pressure sensor 15.
    Type: Grant
    Filed: August 20, 1998
    Date of Patent: April 11, 2000
    Assignee: Nihon Kohden Corporation
    Inventors: Ryoichi Ochiai, Yoshihiro Sugo, Takeshi Sohma, Rie Tanaka, Wenxi Chen
  • Patent number: 6011989
    Abstract: An electrocardiogram signal derived from electrocardiogram measuring means 1 and a pulse signal derived from pulse-wave measuring means 2 are applied to a CPU 30. The CPU 30 processes the cardiogram signal to detect a QRS wave signal, and processes the pulse signal to detect the amplitude of the pulse signal. The CPU 30 judges whether or not the QRS wave is caused by a ventricular premature contraction. If two QRS waves, not caused by ventricular premature contraction, occurs successively, and the CPU 30 judges if A0.times.k>A1. The CPU 30 judges that a supraventricular extrasystole is occurred. Here, A0 is an amplitude of the first QSR wave; A1 is an amplitude of the second QSR wave; and k is a preset value, 0<k<1.
    Type: Grant
    Filed: August 5, 1998
    Date of Patent: January 4, 2000
    Assignee: Nihon Kohden Corporation
    Inventors: Yoshihiro Sugo, Takeshi Sohma, Rie Tanaka, Wenxi Chen, Shigeru Aso, Ryoichi Ochiai
  • Patent number: 5755669
    Abstract: After an initial blood pressure measurement using a cuff 2 has been made, not only a pulse wave propagation time Tt is counted consecutively, but also a pulse wave propagation time change .DELTA.T is calculated every time the pulse wave propagation time Tt is counted and compared with a pulse wave propagation change threshold .DELTA.Ts. When the pulse wave propagation time change .DELTA.T exceeds the pulse wave propagation time change threshold .DELTA.Ts, not only a blood pressure value BPt is measured with the cuff 2, but also a pulse wave propagation time Tt.sub.1 is counted. If there are at least two sets of data, each set of data consisting of a blood pressure value BPt and a pulse wave propagation time Tt.sub.1, coefficients .alpha., .beta. specific to a subject are calculated from such two sets of data by a least-squares method. Then, the pulse wave propagation time change threshold .DELTA.Ts is calculated from the coefficient .alpha., and the current pulse wave propagation time change threshold .DELTA.
    Type: Grant
    Filed: April 30, 1997
    Date of Patent: May 26, 1998
    Assignee: Nihon Kohden Corporation
    Inventors: Kohei Ono, Hiromitsu Kasuya, Yoshihiro Sugo, Takeshi Sohma, Wenxi Chen