Patents by Inventor He Nan

He Nan 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: 11928009
    Abstract: Aspects of the invention include detecting an error alert from a target computer system. In response to detecting the error alert, performance data is then retrieved from the target computer system. A gated recurrent unit (GRU) neural network is used to generate a prediction of a root cause of the error alert based on the performance data. The weights of a reset gate of the GRU neural network are adjusted based on received feedback of the prediction.
    Type: Grant
    Filed: August 6, 2021
    Date of Patent: March 12, 2024
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Chun Qi Ji, Qiang Li, Jing Sun, Zong Nan Jin, He Jun
  • Publication number: 20220268746
    Abstract: A gas chromatographic (GC) column using a zwitterionic compound and methods of use thereof are disclosed herein. The volatile free acids were observed to strongly retain on these zwitterionic compounds-based columns with excellent peak symmetry. By carefully tuning the structures of these zwitterionic compounds, different selectivity toward volatile free acids was demonstrated. These stationary phases possess a wide working range with thermal stabilities at higher temperatures.
    Type: Application
    Filed: May 9, 2022
    Publication date: August 25, 2022
    Inventors: Jared L. Anderson, Kosuke Kuroda, He Nan
  • Patent number: 11353435
    Abstract: A gas chromatographic (GC) column using a zwitterionic compound and methods of use thereof are disclosed herein. The volatile free acids were observed to strongly retain on these zwitterionic compounds-based columns with excellent peak symmetry. By carefully tuning the structures of these zwitterionic compounds, different selectivity toward volatile free acids was demonstrated. These stationary phases possess a wide working range with thermal stabilities at higher temperatures.
    Type: Grant
    Filed: December 21, 2018
    Date of Patent: June 7, 2022
    Assignee: Iowa State University Research Foundation, Inc.
    Inventors: Jared L. Anderson, Kosuke Kuroda, He Nan
  • Publication number: 20190360979
    Abstract: A gas chromatographic (GC) column using a zwitterionic compound and methods of use thereof are disclosed herein. The volatile free acids were observed to strongly retain on these zwitterionic compounds-based columns with excellent peak symmetry. By carefully tuning the structures of these zwitterionic compounds, different selectivity toward volatile free acids was demonstrated. These stationary phases possess a wide working range with thermal stabilities at higher temperatures.
    Type: Application
    Filed: December 21, 2018
    Publication date: November 28, 2019
    Inventors: Jared L. Anderson, Kosuke Kuroda, He Nan
  • Patent number: 8860471
    Abstract: An isolated gate driver including a driving control circuit, an isolated transformer, an anti-circuit and a secondary processing circuit is provided. The driving control circuit is configured to generate a driving PWM signal for driving a power switch tube. The isolated transformer has a primary winding and a secondary winding. The anti-circuit is connected between the driving control circuit and the primary winding of the isolated transformer, and is configured to suppress a variation of an induced voltage in the secondary winding of the isolated transformer when a duty cycle of the driving PWM signal is sharply decreased. The secondary processing circuit is connected in parallel with the secondary winding of the isolated transformer, and is configured to perform a voltage clamping action on a gate-source voltage of the power switch tube when the duty cycle of the driving PWM signal is sharply decreased.
    Type: Grant
    Filed: September 23, 2012
    Date of Patent: October 14, 2014
    Assignees: FSP Technology Inc., FSP-Powerland Technology Inc.
    Inventors: Ming Xu, Jing-Peng Zhu, Ju-Lu Sun, Zhang-He Nan
  • Publication number: 20130076406
    Abstract: An isolated gate driver including a driving control circuit, an isolated transformer, an anti-circuit and a secondary processing circuit is provided. The driving control circuit is configured to generate a driving PWM signal for driving a power switch tube. The isolated transformer has a primary winding and a secondary winding. The anti-circuit is connected between the driving control circuit and the primary winding of the isolated transformer, and is configured to suppress a variation of an induced voltage in the secondary winding of the isolated transformer when a duty cycle of the driving PWM signal is sharply decreased. The secondary processing circuit is connected in parallel with the secondary winding of the isolated transformer, and is configured to perform a voltage clamping action on a gate-source voltage of the power switch tube when the duty cycle of the driving PWM signal is sharply decreased.
    Type: Application
    Filed: September 23, 2012
    Publication date: March 28, 2013
    Inventors: Ming Xu, Jing-Peng Zhu, Ju-Lu Sun, Zhang-He Nan
  • Publication number: 20120159202
    Abstract: A power supply apparatus suitable for a computer is provided. The provided power supply apparatus includes an isolated DC-DC converter, an auxiliary power conversion circuit and a switching circuit. The isolated DC-DC converter receives and converts an input voltage, so as to generate a first main power. The auxiliary power conversion circuit receives and converts the input voltage, so as to generate an auxiliary power. The switching circuit receives the first main power and the auxiliary power, wherein the switching circuit outputs the received auxiliary power to be served as a standby power of the power supply apparatus when the power supply apparatus is in a standby state; moreover, the switching circuit outputs the received first main power to be served as the standby power of the power supply apparatus when the power supply apparatus is in an operation state.
    Type: Application
    Filed: December 14, 2011
    Publication date: June 21, 2012
    Applicants: FSP-POWERLAND TECHNOLOGY INC., FSP TECHNOLOGY INC.
    Inventors: Ming Xu, Zhang-He Nan, Ju-Lu Sun, Wen-Chang Han
  • Patent number: D562655
    Type: Grant
    Filed: May 16, 2007
    Date of Patent: February 26, 2008
    Inventor: He-Nan Chen