Patents by Inventor Dongming Liu
Dongming Liu 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).
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Publication number: 20240140787Abstract: A magnesium-based solid hydrogen storage material with liquid phase regulation function and a preparation method thereof and an application thereof in an all-solid-state battery are provided, belonging to the technical field of new energy. The magnesium-based solid hydrogen storage material with the liquid phase regulation function includes following raw materials in percentage by mass: 95% of magnesium hydride and 5% of lithium borohydride. Lithium borohydride as an ionic conductor is dispersed on a surface and matrix of magnesium hydride, which provides channels for the rapid hydrogen storage of the magnesium hydride-based materials.Type: ApplicationFiled: July 13, 2023Publication date: May 2, 2024Inventors: Yongtao LI, Zhikang QIN, Xiaoli DING, Haiwen LI, Tingzhi SI, Dongming LIU, Qingan ZHANG
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Patent number: 11969846Abstract: The present invention proposes an in-situ freezing machining method for an integrated thin-walled array structure. In the method, the area among cups is cut off first; then, the outer walls of a cup array are machined; and finally, water filling and freezing are carried out, and in-situ freezing machining of the inner walls of the cup array is carried out. Then, hoisting and turning over are carried out, and the area among cavities is cut off; then, the outer walls of a cavity array are machined; and finally, water filling and freezing are carried out, and in-situ freezing machining of the inner walls of the cavity array is carried out. The method realizes in-situ freezing clamping of workpieces, avoids error accumulation caused by repeated installation of a fixture, and can refrigerate efficiently, suppress ambient and cutting thermal interference, and ensure the stability of freezing fixture.Type: GrantFiled: November 17, 2021Date of Patent: April 30, 2024Assignee: DALIAN UNIVERSITY OF TECHNOLOGYInventors: Haibo Liu, Chengxin Wang, Yongqing Wang, Xu Li, Kuo Liu, Xiaofei Ma, Dongming Guo
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Patent number: 11965695Abstract: A closed variable-frequency heat pump drying device with a heat regenerator includes a variable-frequency compressor, a condenser, a throttling valve, an evaporator, a heat regenerator, a three-way valve, a variable-frequency fan, an air inlet temperature sensor, an air inlet humidity sensor, a drying bin, an air outlet temperature sensor, an air outlet humidity sensor and a controller. The controller regulates frequency of the variable-frequency compressor by comparing magnitudes of actual and set air inlet temperatures; a ratio of a straight-through air volume to a regenerated air volume of the three-way valve by comparing magnitudes of actual and set air inlet humidity; and frequency of the variable-frequency fan by comparing magnitudes of actual and set air humidity difference and magnitudes of actual and set air temperature difference of medium air entering and exiting the drying bin.Type: GrantFiled: March 23, 2021Date of Patent: April 23, 2024Assignee: SHUNDE POLYTECHNICInventors: Yansheng Xu, Zhijiang Wu, Da Feng, Huaxing Liu, Xiyu Li, Dongming Li
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Publication number: 20240075568Abstract: The present invention proposes an in-situ freezing machining method for an integrated thin-walled array structure. In the method, the area among cups is cut off first; then, the outer walls of a cup array are machined; and finally, water filling and freezing are carried out, and in-situ freezing machining of the inner walls of the cup array is carried out. Then, hoisting and turning over are carried out, and the area among cavities is cut off; then, the outer walls of a cavity array are machined; and finally, water filling and freezing are carried out, and in-situ freezing machining of the inner walls of the cavity array is carried out. The method realizes in-situ freezing clamping of workpieces, avoids error accumulation caused by repeated installation of a fixture, and can refrigerate efficiently, suppress ambient and cutting thermal interference, and ensure the stability of freezing fixture.Type: ApplicationFiled: November 17, 2021Publication date: March 7, 2024Inventors: Haibo LIU, Chengxin WANG, Yongqing WANG, Xu LI, Kuo LIU, Xiaofei MA, Dongming GUO
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Publication number: 20230315713Abstract: Embodiments in the present description provide an operation request processing method and apparatus, and a device, and a readable storage medium, and a system. In the present embodiment, after obtaining an operation request for a data table, a read-write node can return a request processing completion message to a requester in time without waiting for all read-only nodes; a locking operation is performed on the data table, a log of locking the data table is written into a redo log file; and after status information of the log of locking is written into a status record, a monitoring processing process can achieve log playback monitoring of all the read-only nodes by using the status record and the log of locking. Thus, an asynchronous processing mechanism is achieved, and the stability and efficiency of operation request execution are improved.Type: ApplicationFiled: August 11, 2021Publication date: October 5, 2023Inventors: Dongming LIU, Feifei LI, Xiaojian FAN, Songlu CAI, Guangzhou ZHANG, Zhongxing ZHANG
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Publication number: 20230311268Abstract: The present disclosure includes methods of lapping that include energizing one or more elements that are located proximal to a first magnetoresistive element in a transducer region and generate heat and cause the first magnetoresistive element to selectively expand in the lapping direction relative to one or more other magnetoresistive elements. The present disclosure also includes methods of lapping that use one or more thermal sensors located proximal to the first magnetoresistive element to help control lapping in the lapping direction. The present disclosure includes related lapping systems and sliders.Type: ApplicationFiled: May 19, 2023Publication date: October 5, 2023Inventors: Edwin Rejda, Andrew Habermas, Jeff O'Konski, Andrew Sherve, Michael Thomas Johnson, Dongming Liu
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Patent number: 11691242Abstract: The present disclosure includes methods of lapping that include energizing one or more elements that are located proximal to a first magnetoresistive element in a transducer region and generate heat and cause the first magnetoresistive element to selectively expand in the lapping direction relative to one or more other magnetoresistive elements. The present disclosure also includes methods of lapping that use one or more thermal sensors located proximal to the first magnetoresistive element to help control lapping in the lapping direction. The present disclosure includes related lapping systems and sliders.Type: GrantFiled: April 14, 2022Date of Patent: July 4, 2023Assignee: Seagate Technology LLCInventors: Edwin Rejda, Andrew Habermas, Jeff O'Konski, Andrew Sherve, Michael Thomas Johnson, Dongming Liu
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Publication number: 20220234166Abstract: The present disclosure includes methods of lapping that include energizing one or more elements that are located proximal to a first magnetoresistive element in a transducer region and generate heat and cause the first magnetoresistive element to selectively expand in the lapping direction relative to one or more other magnetoresistive elements. The present disclosure also includes methods of lapping that use one or more thermal sensors located proximal to the first magnetoresistive element to help control lapping in the lapping direction. The present disclosure includes related lapping systems and sliders.Type: ApplicationFiled: April 14, 2022Publication date: July 28, 2022Inventors: Edwin Rejda, Andrew Habermas, Jeff O'Konski, Andrew Sherve, Michael Thomas Johnson, Dongming Liu
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Patent number: 11389924Abstract: The present disclosure includes methods of lapping that include energizing one or more elements that are located proximal to a first magnetoresistive element in a transducer region and generate heat and cause the first magnetoresistive element to selectively expand in the lapping direction relative to one or more other magnetoresistive elements. The present disclosure also includes methods of lapping that use one or more thermal sensors located proximal to the first magnetoresistive element to help control lapping in the lapping direction. The present disclosure includes related lapping systems and sliders.Type: GrantFiled: June 7, 2019Date of Patent: July 19, 2022Assignee: Seagate Technology LLCInventors: Edwin Rejda, Andrew Habermas, Jeff O'Konski, Andrew Sherve, Michael Thomas Johnson, Dongming Liu
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Patent number: 11034824Abstract: The invention relates to a polymer composition comprising a polymer (a) and a nanoparticle filler (b), wherein the polymer composition comprises a volume percentage (vol. %) of the nanoparticle filler (b), which is Dvol vol. %, and has a center-to-center average distance, in nanometer (nm), in two dimensions (2D) and with a free radius, from one nanoparticle to its nearest nanoparticle neighbour, which is R1st nm, and wherein the polymer composition shows a dependency between said center-to-center average distance to nearest neighbour, R1st, and said volume percentage, Dvol vol. %, which is R1st=E/(Dvol+0.3)+F, wherein Dvol1?Dvol?Dvol2, E1?E?E2, F1?F?F2, and Dvol1 is 0.010 and Dvol2 is 4.4, E1 is 100 and E2 is 280, and F1 is 50 and F2 is 140; an electrical device, e.g. a power cable; and a process for producing an electrical device.Type: GrantFiled: March 2, 2017Date of Patent: June 15, 2021Assignee: BOREALIS AGInventors: Love Pallon, Amir Masoud Pourrahimi, Dongming Liu, Richard Olsson, Mikael Hedenqvist, Stanislaw Gubanski, Ulf Gedde
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Publication number: 20200291209Abstract: The invention relates to a polymer composition comprising a polymer (a)and a nanoparticle filler (b), wherein the polymer composition comprises a weight percentage (wt. %) of the nanoparticle filler (b) which is A, wherein A is 0.05 wt. %,or more, and wherein the polymer composition has a first nanoparticle aggregate ratio which is B, wherein B is 0.50, or less, wherein a first aggregate size is defined as a cluster of nanoparticles with a cluster size larger than d1, wherein d is 1.0 ?m; an electrical device, e.g. a power cable; and a process for producing an electrical device.Type: ApplicationFiled: March 2, 2017Publication date: September 17, 2020Inventors: Love PALLON, Amir Masoud POURRAHIMI, Dongming LIU, Richard OLSSON, Mikael HEDENQVIST, Stanislaw GUBANSKI, Ulf GEDDE
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Publication number: 20200291208Abstract: The invention relates to a polymer composition comprising a polymer (a) and a nanoparticle filler (b), wherein the polymer composition comprises a volume percentage (vol. %) of the nanoparticle filler (b), which is Dvol vol. %, and has a center-to-center average distance, in nanometer (nm), in two dimensions (2D) and with a free radius, from one nanoparticle to its nearest nanoparticle neighbour, which is R1st nm, and wherein the polymer composition shows a dependency between said center-to-center average distance to nearest neighbour, R1st, and said volume percentage, Dvol vol. %, which is R1st=E/(Dvol+0.3)+F, wherein Dvol1?Dvol?Dvol2, E1?E?E2, F1?F?F2, and Dvol1 is 0.010 and Dvol2 is 4.4, E1 is 100 and E2 is 280, and F1 is 50 and F2 is 140; an electrical device, e.g. a power cable; and a process for producing an electrical device.Type: ApplicationFiled: March 2, 2017Publication date: September 17, 2020Inventors: Love PALLON, Amir Masoud POURRAHIMI, Dongming LIU, Richard OLSSON, Mikael HEDENQVIST, Stanislaw GUBANSKI, Ulf GEDDE
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Publication number: 20190381629Abstract: The present disclosure includes methods of lapping that include energizing one or more elements that are located proximal to a first magnetoresistive element in a transducer region and generate heat and cause the first magnetoresistive element to selectively expand in the lapping direction relative to one or more other magnetoresistive elements. The present disclosure also includes methods of lapping that use one or more thermal sensors located proximal to the first magnetoresistive element to help control lapping in the lapping direction. The present disclosure includes related lapping systems and sliders.Type: ApplicationFiled: June 7, 2019Publication date: December 19, 2019Inventors: Edwin Rejda, Andrew Habermas, Jeff O'Konski, Andrew Sherve, Michael Thomas Johnson, Dongming Liu
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Patent number: 9928873Abstract: An apparatus comprises a slider configured for writing data to and reading data from a magnetic recording medium and for heat-assisted magnetic recording. The slider comprises a heater configured to receive an AC signal and to cause oscillation in a spacing between the slider and the medium, and a contact sensor situated on the slider and configured to produce a DC response signal. A detector is coupled to the slider and configured to measure an amplitude of a spike in the DC response signal, calculate a ratio between the spike amplitude and an amplitude of the DC response signal, and detect contact between the slider and the medium in response to the ratio exceeding a predetermined threshold.Type: GrantFiled: June 30, 2017Date of Patent: March 27, 2018Assignee: SEAGATE TECHNOLOGY LLCInventors: Dongming Liu, Huazhou Lou, Eric John McCalla, James Robert Oscarson, Shawn S. Silewski
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Patent number: 9792940Abstract: Using a high sample rate dPES, together with pulsed heater and lock-in technique, to improve dPES SNR for contact detection between the head and media surface. Steps of powering a transducing head actuator with pulsed input signal at a select data track offset from a previously-written to data track of the storage medium, where the pulsed input signal has select amplitude and duty cycle to simulate a response signal, and further locking in an amplitude with respect to the heater frequency, can lead to a determination of level of heater power for initiating contact between the transducing head and the storage medium.Type: GrantFiled: March 15, 2013Date of Patent: October 17, 2017Assignee: Seagate Technology LLCInventors: Lin Zhou, Juil Lee, Dongming Liu, Huazhou Lou
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Patent number: 9548072Abstract: An apparatus comprises a heat-assisted magnetic recording (HAMR) head, a sensor, and a controller. The HAMR head is configured to interact with a magnetic storage medium. The sensor is configured to produce a signal indicating the occurrence of head-medium contact. The controller is configured to receive the signal and concurrently determine from the signal if the occurrence of head-medium contact is caused by a first contact detection parameter, a second contact detection parameter, or both the first and second contact detection parameters.Type: GrantFiled: February 11, 2015Date of Patent: January 17, 2017Assignee: SEAGATE TECHNOLOGY LLCInventors: Huazhou Lou, Jason Riddering, Shawn S. Silewski, Dongming Liu, Lin Zhou
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Publication number: 20160232931Abstract: An apparatus comprises a heat-assisted magnetic recording (HAMR) head, a sensor, and a controller. The HAMR head is configured to interact with a magnetic storage medium. The sensor is configured to produce a signal indicating the occurrence of head-medium contact. The controller is configured to receive the signal and concurrently determine from the signal if the occurrence of head-medium contact is caused by a first contact detection parameter, a second contact detection parameter, or both the first and second contact detection parameters.Type: ApplicationFiled: February 11, 2015Publication date: August 11, 2016Inventors: Huazhou Lou, Jason Riddering, Shawn S. Silewski, Dongming Liu, Lin Zhou
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Patent number: 9390741Abstract: A head transducer, configured to interact with a magnetic recording medium, includes a first sensor having a temperature coefficient of resistance (TCR) and configured to produce a first sensor signal, and a second sensor having a TCR and configured to produce a second sensor signal. One of the first and second sensors is situated at or near a close point of the head transducer in relation to the magnetic recording medium, and the other of the first and second sensors spaced away from the close point. Circuitry is configured to combine the first and second sensor signals and produce a combined sensor signal indicative of one or both of a change in head-medium spacing and head-medium contact. Each of the sensors may have a TCR with the same sign (positive or negative) or each sensor may have a TCR with a different sign.Type: GrantFiled: May 22, 2015Date of Patent: July 12, 2016Assignee: SAEGATE TECHNOLOGY LLCInventors: Michael Thomas Johnson, Dongming Liu, Huazhou Lou, Declan Macken, Timothy William Stoebe, James Gary Wessel, Xuan Zheng
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Patent number: 9202495Abstract: A method and apparatus are provided for positioning a transducer relative to a track of a data storage medium and inducing lateral modulation of transducer the relative to the track. An element of the transducer is actuated toward the storage medium during the lateral modulation, and atomic interaction is detected between the element and the storage medium because of a change in a response to the lateral modulation of the transducer due to the atomic interaction.Type: GrantFiled: May 1, 2007Date of Patent: December 1, 2015Assignee: SEAGATE TECHNOLOGY LLCInventors: Dongming Liu, Lin Zhou, Lance E. Stover
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Patent number: 9135938Abstract: A method of detecting a contact between a transducing head and a storage medium is provided. The method applies an input signal, having a select power level and known frequency, to an actuator for actuating the head. An output signal is obtained in response to the input signal. At least one signal component is extracted from the output signal at the same or a harmonic of the same known frequency as the input signal applied to the actuator. Whether the at least one extracted signal component indicates a contact between the head and the medium is determined. The power level of the applied wave pattern is increased incrementally until the extracted signal component indicates a contact between the head and the storage medium.Type: GrantFiled: May 20, 2014Date of Patent: September 15, 2015Assignee: SEAGATE TECHNOLOGY LLCInventors: Dongming Liu, Lin Zhou, Adam Karl Himes, Lee Clifford Knippenberg, Michael Thomas Johnson