Patents by Inventor Lifeng Liu

Lifeng 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).

  • Publication number: 20200292036
    Abstract: A good-orientation, low-drift micro-movement subassembly for angle adjustment as a precise driving screw for angle adjustment, comprising a slotted knurling handle, a turnbuckle and a central cylindrical shaft. The invention is precise for linear displacement, good orientation, low-drift, stable and reliable adjustment, which can be used for a variety of precision-oriented, small drift, precision micro-angle adjustment of the drive screw.
    Type: Application
    Filed: July 17, 2019
    Publication date: September 17, 2020
    Inventors: Jianqiang ZHU, Gengxiu Tang, Zhigang Liu, Lifeng Du, Xiangyang Pang, Chao Zhang
  • Publication number: 20200284300
    Abstract: A low-drift optical mount comprising a first plate, a second plate, at least one drive rod, at least one collet. A first collet may extend through a bore of the second plate and has an inner screw matching the external screw of a first drive rod. The first drive rod may have a contact end with the first plate and a spring pulls the first plate back toward the second plate. The collet may have at least one slot that extends through the own inner thread surface. The slot can relieve the drift performance induced by grease which fills in the thread fit clearance and further improve the position stability of optical mount.
    Type: Application
    Filed: December 31, 2019
    Publication date: September 10, 2020
    Inventors: Jianqiang ZHU, Chao ZHANG, Gengxiu TANG, Zhigang LIU, Lifeng DU
  • Patent number: 10744558
    Abstract: A magnesium alloy cast-rolling unit, including: a main body; a fluid supplier; an electric pushrod; a linkage mechanism; a horizontal platform; a screw; dovetail guide rails; and a bottom plate. The main body includes a base, a spring cylinder, a hydraulic adjustment cylinder, a connection portion, and a cast-rolling unit body. The connection portion includes an arc-shaped rail. The spring cylinder includes an actuation element. The actuation element includes a piston rod and a pressure strip. The piston rod includes an external thread at one end; and the pressure strip includes an internal thread corresponding to the external thread. The fluid supplier includes a head box, a corrugated pipe, a compression spring assembly including a gland cover, a connection pipe including a convex pipe joint and a concave pipe joint, a flat plate including a groove, a smelting furnace, and a horizontal operation platform.
    Type: Grant
    Filed: September 2, 2019
    Date of Patent: August 18, 2020
    Assignee: TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
    Inventors: Lifeng Ma, Jingfeng Zou, Rongjun Wang, Xiao Hu, Zhiquan Huang, Qingxue Huang, Guangming Liu, Yanchun Zhu
  • Patent number: 10740001
    Abstract: Embodiments of the present disclosure provide a method, an apparatus and a computer program product for managing an input/output (I/O). The method comprises, in response to receiving a first I/O request of a first type for a storage device, determining whether there exists at least one credit available to the first type of I/O requests. Each of the at least one credit indicates I/O processing capability reserved by the storage device for the first type of I/O requests. The method further comprises allocating a first credit to the first I/O request based on a result of the determining. The method further comprises performing, by using the first credit, an I/O operation requested by the first I/O request on the storage device. Moreover, the method further comprises, in response to completion of the I/O operation, recycling the first credit for use by a subsequent I/O request. Embodiments of the present disclosure can implement dynamic allocation of I/O processing capability for different types of I/Os.
    Type: Grant
    Filed: October 31, 2018
    Date of Patent: August 11, 2020
    Assignee: Dell Products L.P.
    Inventors: Lifeng Yang, Xinlei Xu, Liam Li, Ruiyong Jia, Yousheng Liu
  • Patent number: 10740245
    Abstract: Embodiments of the present disclosure provide a method, device and computer program product for cache management. The method includes: receiving from a storage device an indication for an invalid storage block in the storage device; in response to receiving the indication, looking up a cache page associated with the invalid storage block in the cache; in response to finding the cache page in the cache, determining validity of data in the cache page; and in response to the data being invalid, reclaiming the cache page.
    Type: Grant
    Filed: October 29, 2018
    Date of Patent: August 11, 2020
    Assignee: EMC IP Holding Company LLC
    Inventors: Ruiyong Jia, Xinlei Xu, Lifeng Yang, Liam Xiongcheng Li, Yousheng Liu
  • Publication number: 20200248868
    Abstract: A grease pumping device includes a pump body, a driving mechanism, a plunger pair, a reversing valve and a lever mechanism. A switching action between each valve position of a valve core of the reversing valve is driven by the lever mechanism. An output rotating shaft drives a toggle member rotating therewith, and when the output rotating shaft rotates reciprocally in forward and reverse directions, the toggle member toggles the lever mechanism in the forward and reverse directions, such that the lever mechanism swings reciprocally. At least one of the lever mechanism and the toggle member is an elastic structure, when the output rotating shaft rotates, the toggle member contacts the lever mechanism and drives the valve core to operate, when the valve core is switched to a corresponding valve position, the toggle member and the lever mechanism slide relatively by elastic deformation of the elastic structure.
    Type: Application
    Filed: April 24, 2020
    Publication date: August 6, 2020
    Applicant: ZHENGZHOU AUTOL TECHNOLOGY CO., LTD.
    Inventors: Daping ZHAO, Xingong LIU, Zhang LIU, Lifeng MA
  • Publication number: 20200241777
    Abstract: Embodiments of the present disclosure relate to a method, device and computer readable medium for managing storage. The method comprises: in response to obtaining, at a first storage processor, an access request for a storage unit, determining whether the storage unit is currently accessible, the storage unit including at least one storage area. The method further comprises: in response to the storage unit being currently inaccessible, determining whether the first storage processor has an access right to the storage unit. In addition, the method further comprises: in response to the first storage processor having no access right, requesting a second storage processor for the access right, the second storage processor being associated with a mirror storage unit of the storage unit, and the first and second storage processors having exclusive write access rights.
    Type: Application
    Filed: February 10, 2020
    Publication date: July 30, 2020
    Inventors: Yousheng Liu, Jian Gao, Xinlei Xu, Lifeng Yang, Changyu Feng
  • Publication number: 20200244065
    Abstract: Disclosed is a surge control circuit, including: an absorption circuit including an absorption element and a bypass switch which are connected in series, a switch group connected in parallel to both ends of the absorption circuit and a first control circuit electrically connected to the switch group and bypass switch respectively. Normally, the first control circuit controls the switch group and the bypass switch to turn on simultaneously, makes the current flow through the switch group; when detecting the current is greater than or equal to the first preset current value, or the current increase rate is greater than or equal to the preset current rate of change, the first control circuit controls the switch group to turn off, makes the current flow through the absorption circuit; when detecting the current is less than the second preset current value, the first control circuit controls the bypass switch to turn off.
    Type: Application
    Filed: October 1, 2019
    Publication date: July 30, 2020
    Inventors: JianPing YING, Wuying LI, Lifeng QIAO, Teng LIU
  • Patent number: 10719240
    Abstract: A method and device for managing a storage system. In one embodiment of the present invention, there is proposed a method for managing a storage system. In the method, in response to receiving a write request with respect to the data storage system, acquiring a destination address associated with the write request, the destination address being an address in the storage device; a source address associated with data to be written to the destination address is acquired, where the source address is an address in the storage device. The buffer device is searching for the source address on the basis of an association relationship between a page included in the buffer device and an address in the storage device. Information associated with the destination address is updated on the basis of a result of the search.
    Type: Grant
    Filed: December 19, 2017
    Date of Patent: July 21, 2020
    Assignee: EMC IP Holding Company LLC
    Inventors: Liam Xiongcheng Li, Xinlei Xu, Jian Gao, Lifeng Yang, Yousheng Liu
  • Publication number: 20200227049
    Abstract: A method, apparatus, and device for waking up a voice interaction device, and a storage medium are provided. The method includes: acquiring a voice signal; extracting a first voiceprint characteristic of the voice signal; comparing the first voiceprint characteristic with a pre-stored reference voiceprint characteristic to obtain a similarity between the first voiceprint characteristic and the pre-stored reference voiceprint characteristic; comparing the similarity with a preset threshold; and determining that the first voiceprint characteristic is consistent with the reference voiceprint characteristic in response to the similarity larger than the preset threshold; and determining a wake-up word included in content of the voice signal by using a wake-up word recognition model and waking up the voice interaction device. In the embodiments, the ratio for falsely waking up a voice interactive device is reduced.
    Type: Application
    Filed: October 15, 2019
    Publication date: July 16, 2020
    Applicant: Baidu Online Network Technology (Beijing) Co., Ltd.
    Inventors: Yong Liu, Ji Zhou, Xiangdong Xue, Peng Wang, Lifeng Zhao
  • Publication number: 20200227069
    Abstract: A method, device and apparatus for recognizing a voice signal, and a storage medium are provided. The method includes: collecting a voice signal; extracting the voiceprint feature of the voice signal; comparing the voiceprint feature with a pre-stored reference voiceprint feature; and recognizing a content of the voice signal with a voice recognition model, in response to a consistence of the voiceprint feature with the pre-stored reference voiceprint feature. Embodiments of the present application can improve the accuracy of recognizing voice signals.
    Type: Application
    Filed: October 15, 2019
    Publication date: July 16, 2020
    Applicant: Baidu Online Network Technology (Beijing) Co., Ltd.
    Inventors: Yong Liu, Ji Zhou, Xiangdong Xue, Peng Wang, Lifeng Zhao
  • Publication number: 20200219692
    Abstract: Disclosed is a circuit breaker apparatus, including a first switching assembly, a first controller, a second switching assembly and a second controller. The first switching assembly is connected in series between a positive pole of a power supply and a load. The first switching assembly includes multiple first switching units in series. The first controller is electrically connected to a first pre-set reference potential of the first switching assembly. The first controller is electromagnetically coupled with each first switching unit through a first transformer unit. The second switching assembly is connected in series between a negative pole of the power supply and the load. The second switching assembly includes multiple second switching units in series. The second controller is electrically connected to a second pre-set reference potential of the second switching assembly. The second controller is electromagnetically coupled with each second switching unit through a second transformer unit.
    Type: Application
    Filed: April 9, 2019
    Publication date: July 9, 2020
    Inventors: Teng LIU, Lifeng QIAO, Dehui ZHANG, JianPing YING
  • Patent number: 10705768
    Abstract: Embodiments of the present invention provide a method and a system for managing a storage system. Specifically, in one embodiment of the present invention there is provided a method for managing a storage system, the method comprising: in response to receiving a write request for writing target data to the storage system, writing the target data to an intermediate address range in an intermediate storage area of the storage system; parsing, based on an address mapping of the storage system, a target address range associated with the write request so as to obtain an actual address range; and moving the target data from the intermediate address range to the actual address range. In one embodiment of the present invention there is further provided a corresponding system and apparatus.
    Type: Grant
    Filed: June 22, 2017
    Date of Patent: July 7, 2020
    Assignee: EMC IP Holding Company LLC
    Inventors: Ruiyong Jia, Jian Gao, Lifeng Yang, Xinlei Xu, Yousheng Liu
  • Patent number: 10689287
    Abstract: A method for preparing a doped optical fibre preform includes formulating, a rare earth material or a functional metal material and a co-doping agent into a doping solution, mixing a high-purity quartz powder with the doping solution, drying same at a temperature of 100° C.-150° C. for 12-48 hours, crushing and screening the same to obtain a doped quartz powder; depositing the doped quartz powder onto the surface of a target rod to form a doped core layer; replacing the doped quartz powder with the high-purity quartz powder, and depositing the high-purity quartz powder onto the surface of the doped core layer to form a quartz outer cladding; and removing the target rod, and gradually collapsing the entirety formed from the doped core layer and the quartz outer cladding at a high temperature to obtain the doped optical fibre preform.
    Type: Grant
    Filed: October 21, 2016
    Date of Patent: June 23, 2020
    Assignee: FIBERHOME TELECOMMUNICATION TECHNOLOGIES CO., LTD
    Inventors: Cheng Du, Wenyong Luo, Lei Yan, Tao Zhang, Chao Chen, Yili Ke, Ming Kong, Jie Zhang, Zhijian Liu, Lifeng Liu
  • Publication number: 20200196384
    Abstract: Embodiments of this application provide a base station to which a communication processing method using a relay is applied. A control plane protocol layer includes an RRC layer and a PDCP layer that are respectively peering to those of a terminal; and the control plane protocol layer further includes an adaptation layer, an RLC layer, a MAC layer, and a PHY layer that are respectively peering to those of the relay. Via the base station including the control plane protocol layer, information about the RRC layer and the PDCP layer of the terminal does not need to be parsed in the relay, thereby reducing complexity of implementing the relay.
    Type: Application
    Filed: February 26, 2020
    Publication date: June 18, 2020
    Inventors: Jing LIU, Lifeng HAN, Rui WANG
  • Patent number: 10677865
    Abstract: The present disclosure relates to a magnetic resonance imaging device and shimming methods on the magnetic resonance imaging device. The magnetic resonance imaging device includes a main magnet, gradient coils, a vacuum enclosure, and a shimming conduit. The vacuum enclosure is configured to house at least part of the shimming conduit. The vacuum enclosure and at least part of the shimming conduit defines a hermetically sealed space configured to house the gradient coils. The shimming conduit has at least one opening configured to allow for access to an interior of the shimming conduit. The interior of the shimming conduit is hermetically insulated from the hermetically sealed space.
    Type: Grant
    Filed: June 26, 2018
    Date of Patent: June 9, 2020
    Assignee: SHANGHAI UNITED IMAGING HEALTHCARE CO., LTD.
    Inventors: Xingen Yu, Yong Liu, Shuguang Liu, Jiwen Yang, Tao Wang, Baogang Peng, Man Fan, Lifeng Wang
  • Publication number: 20200174683
    Abstract: A method and a system for delivering a message in a storage system. In one embodiment of the present invention, there is provided a method for delivering a message in a storage system comprising a first controller, a second controller, a first communication area and a second communication area. The method comprises: in response to receiving a message that is to be delivered from the first controller to the second controller, writing the message to the first communication area that is readable and writable to the first controller and readable to the second controller; and writing an address identifier to the second communication area, the address identifier being used for indicating an address at which the second controller reads the message from the first communication area, the second communication area being readable to the first controller and readable and writable to the second controller.
    Type: Application
    Filed: January 31, 2020
    Publication date: June 4, 2020
    Inventors: Yousheng Liu, Jamin Jianbin Kang, Xinlei Xu, Ruiyong Jia, Jian Gao, Lifeng Yang
  • Patent number: 10664392
    Abstract: The present invention discloses a method and device for managing a storage system. Specifically, in one embodiment of the present invention there is proposes a method for managing a storage system, the method comprising: dividing a stripe included in a storage array in the storage system into a group of blocks; in response to receiving an allocation request for a storage space in the storage system, determining a space size associated with the allocation request; and building a repository based on one or more blocks selected from the group which match the space size, the repository being defined using an address mapping including addresses of the one or more blocks in the storage system. In one embodiment of the present invention there is proposed a device for managing a storage system.
    Type: Grant
    Filed: December 20, 2017
    Date of Patent: May 26, 2020
    Assignee: EMC IP Holding Company LLC
    Inventors: Xinlei Xu, Jian Gao, Lifeng Yang, Yousheng Liu, Changyu Feng
  • Publication number: 20200158980
    Abstract: Disclosed are a split lens assembly and a camera module. The split lens assembly comprises a first lens module and a second lens module. The first lens module is assembled to the second lens module. The first lens module and the second lens module are calibrated and assembled. A spacing that facilitates calibration is located between the first lens module and the second lens module.
    Type: Application
    Filed: March 23, 2018
    Publication date: May 21, 2020
    Applicant: Ningbo Sunny Opotech Co., Ltd.
    Inventors: Mingzhu Wang, Chunmei LIU, Shoujie WANG, Nan GUO, Lifeng YAO, Liang DING
  • Publication number: 20200133867
    Abstract: Techniques provide cache service in a storage system. Such techniques involve a storage cell pool, a cache and an underlying storage system. The storage cell pool includes multiple storage cells, a storage cell among the multiple storage cells being mapped to a physical address in the underlying storage system via an address mapping of the storage system. Specifically, an access request for target data at a virtual address in the storage cell pool is received, and the type of the access request is determined. The access request is served with the cache on the basis of the determined type, where the cache is used to cache data according to a format of a storage cell in the storage cell pool. The cache directly stores data in various storage cells in the pool that is visible to users, so that response speed for the access request may be increased.
    Type: Application
    Filed: September 17, 2019
    Publication date: April 30, 2020
    Inventors: Ruiyong Jia, Xinlei Xu, Lifeng Yang, Yousheng Liu, Changyu Feng