Patents by Inventor Xiumei Liu
Xiumei 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: 20210164916Abstract: A beam of light is directed from a light source at a wafer on a chuck. The beam of light is reflected off the wafer toward a 2D imaging camera. Movable focus lenses in the path of the beam of light can independently change the illumination conjugate and the collection conjugate. A structured mask in an illumination path can be used and the beam of light can be directed through apertures in the structured mask. A gray field image of a wafer in a zone without direct illumination is generated using the 2D imaging camera and locations of defects on the wafer can be determined using the gray field image.Type: ApplicationFiled: November 27, 2020Publication date: June 3, 2021Inventor: Xiumei Liu
-
Patent number: 10814260Abstract: The present invention discloses a gas-powder separation three-phase jet flow fire monitor system, including a gas-powder separation three-phase fire monitor head, a filter, a nitrogen pressurization apparatus and a dry powder tank. The dry powder tank is connected to a gas-powder mixture inlet pipe of the gas-powder separation three-phase fire monitor head through a pipeline. A nitrogen outlet pipe of the gas-powder separation three-phase fire monitor head is connected with one end of the nitrogen pressurization apparatus through the filter. The other end of the nitrogen pressurization apparatus is connected with the dry powder tank. The present invention is simple in structure and convenient to use.Type: GrantFiled: August 25, 2017Date of Patent: October 27, 2020Assignee: China University of Mining and TechnologyInventors: Beibei Li, Xiumei Liu, Jingjing Wang, Ruirui Li, Yaoda Yue, Jie He, Wei Li
-
Publication number: 20200319443Abstract: An auto-focusing system is disclosed. The system includes an illumination source. The system includes an aperture. The system includes a projection mask. The system includes a detector assembly. The system includes a relay system, the relay system being configured to optically couple illumination transmitted through the projection mask to an imaging system. The relay system also being configured to project one or more patterns from the projection mask onto a specimen and transmit an image of the projection mask from the specimen to the detector assembly. The system includes a controller including one or more processors configured to execute a set of program instructions. The program instructions being configured to cause the one or more processors to: receive one or more images of the projection mask from the detector assembly and determine quality of the one or more images of the projection mask.Type: ApplicationFiled: March 31, 2020Publication date: October 8, 2020Inventors: Xiumei Liu, Kai Cao, Richard Wallingford, Matthew Giusti, Brooke Bruguier
-
Patent number: 10663982Abstract: Disclosed in the present invention is a double-spring and high-precision hysteretic pressure control valve, including an upper valve body, a lower valve body, a double-spring pressure adjustment valve, a spring energy storage linkage mechanism, and a main valve. The double-spring pressure adjustment valve includes a rough adjustment stud, a rough adjustment spring, a fine adjustment stud, a fine adjustment spring, a spring guide sleeve, and a pressure adjustment valve spool. The spring energy storage linkage mechanism includes a guide block, a valve spool control linkage, a tension spring, and a tension spring shift lever and a tension spring sliding hook. The valve spool control linkage is connected to the guide block at one end, and connected to a main valve spool drive rod via a pin at the other end.Type: GrantFiled: January 16, 2018Date of Patent: May 26, 2020Assignee: CHINA UNIVERSITY OF MINING AND TECHNOLOGYInventors: Xiumei Liu, Ruirui Li, Beibei Li, Jie He
-
Publication number: 20200133311Abstract: Disclosed in the present invention is a double-spring and high-precision hysteretic pressure control valve, including an upper valve body, a lower valve body, a double-spring pressure adjustment valve, a spring energy storage linkage mechanism, and a main valve. The double-spring pressure adjustment valve includes a rough adjustment stud, a rough adjustment spring, a fine adjustment stud, a fine adjustment spring, a spring guide sleeve, and a pressure adjustment valve spool. The spring energy storage linkage mechanism includes a guide block, a valve spool control linkage, a tension spring, and a tension spring shift lever and a tension spring sliding hook. The valve spool control linkage is connected to the guide block at one end, and connected to a main valve spool drive rod via a pin at the other end.Type: ApplicationFiled: January 16, 2018Publication date: April 30, 2020Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGYInventors: Xiumei LIU, Ruirui LI, Beibei LI, Jie HE
-
Publication number: 20190344107Abstract: The present invention discloses a gas-powder separation three-phase jet flow fire monitor system, including a gas-powder separation three-phase fire monitor head, a filter, a nitrogen pressurization apparatus and a dry powder tank. The dry powder tank is connected to a powder feeding pipe of the gas-powder separation three-phase fire monitor head through a pipeline. A nitrogen outlet pipe of the gas-powder separation three-phase fire monitor head is connected with one end of the nitrogen pressurization apparatus through the filter. The other end of the nitrogen pressurization apparatus is connected with the dry powder tank. The present invention is simple in structure and convenient to use. A cyclone separation apparatus of a dry powder pipeline of the fire monitor may separate nitrogen from conveyed ultrafine dry powder to enable the ultrafine dry powder to be fully mixed with a water-based fire extinguishing agent, thereby reducing an atomization degree of jet flow and enlarging a range of the fire monitor.Type: ApplicationFiled: August 25, 2017Publication date: November 14, 2019Applicant: China University of Mining and TechnologyInventors: Beibei LI, Xiumei LIU, Jingjing WANG, Ruirui LI, Yaoda YUE, Jie HE, Wei LI
-
Patent number: 10407700Abstract: A surfactant-improved simultaneous saccharification and co-fermentation method for lignocelluloses in which a pretreated lignocellulose substrate is directly subjected to surfactant-improved simultaneous saccharification and co-fermentation without any detoxification by adding a surfactant, and the surfactant may be selectively added before or after pre-enzymatic hydrolysis, having economic, effective and feasible application prospects in reducing the loss of glucose, simplifying the production process, reducing equipment investment, reducing water consumption, improving ethanol production and reducing the total cost of the ethanol production process.Type: GrantFiled: December 29, 2014Date of Patent: September 10, 2019Assignee: DALIAN INSTITUTE OF CHEMICAL PHYSICS, CHINESE ACADEMY OF SCIENCESInventors: Zongchao Zhang, Xiumei Liu, Liaoyuan Mao
-
Patent number: 10139011Abstract: A self-heat-dissipation pressure-reducing valve includes: a heat-dissipation valve core, an upper valve deck, a guiding valve deck, a valve body, a heat-dissipation valve seat, an air guide hood, and a turbine-type heat dissipation device. The heat-dissipation valve core is formed by a valve core composed of a heat pipe, and valve core heat-dissipation fins. The heat-dissipation valve seat includes a valve seat pocket, a valve seat shell, heat pipes, and valve seat heat-dissipation fins. An outer circumferential surface of the valve seat pocket is wound with multiple heat pipes fixed to the valve seat heat-dissipation fins. The turbine-type heat dissipation device includes a fan shell provided at a medium inlet, and a turbine. The turbine is lashed by a medium to turn the fan shell, and wind is guided in one direction through the external air guide hood to implement heat dissipation.Type: GrantFiled: November 4, 2016Date of Patent: November 27, 2018Assignee: China University of Mining and TechnologyInventors: Xiumei Liu, Beibei Li, Huawen Xu, Jie He, Bingyang Wang, Mingli Jiao, Fuhua Sun, Haibing Wang, Xiaochen Liu, Zhenzhen Dai, Zihao Xie
-
Patent number: 10066243Abstract: A surfactant-improved ethanol fermentation method comprises adding a nonionic surfactant as a protection agent of yeast cell into a fermentation culture medium, therefore greatly improving survival rate of yeast cells in very high gravity ethanol fermentation liquid and endpoint ethanol concentration. The present invention not only improves the cyclic utilization efficiency of the yeast cells, but also achieves the synchronous recycling of the surfactant and a pH adjusting agent. The process of adding the surfactant during VHG fermentation is simple, which can reduce the consumption of water and energy, effectively reduce the fuel ethanol production cost, and improve the fermentation efficiency.Type: GrantFiled: April 14, 2014Date of Patent: September 4, 2018Assignee: DALIAN INSTITUTE OF CHEMICAL PHYSICS, CHINESE ACADEMY OF SCIENCESInventors: Zongchao Zhang, Xiumei Liu
-
Publication number: 20180238472Abstract: A self-heat-dissipation pressure-reducing valve includes: a heat-dissipation valve core, an upper valve deck, a guiding valve deck, a valve body, a heat-dissipation valve seat, an air guide hood, and a turbine-type heat dissipation device. The heat-dissipation valve core is formed by a valve core composed of a heat pipe, and valve core heat-dissipation fins. The heat-dissipation valve seat includes a valve seat pocket, a valve seat shell, heat pipes, and valve seat heat-dissipation fins. An outer circumferential surface of the valve seat pocket is wound with multiple heat pipes fixed to the valve seat heat-dissipation fins. The turbine-type heat dissipation device includes a fan shell provided at a medium inlet, and a turbine. The turbine is lashed by a medium to turn the fan shell, and wind is guided in one direction through the external air guide hood to implement heat dissipation.Type: ApplicationFiled: November 4, 2016Publication date: August 23, 2018Inventors: Xiumei LIU, Beibei LI, Huawen XU, Jie HE, Bingyang WANG, Mingli JIAO, Fuhua SUN, Haibing WANG, Xiaochen LIU, Zhenzhen DAI, Zihao XIE
-
Publication number: 20170321231Abstract: A surfactant-improved simultaneous saccharification and co-fermentation method for lignocelluloses in which a pretreated lignocellulose substrate is directly subjected to surfactant-improved simultaneous saccharification and co-fermentation without any detoxification by adding a surfactant, and the surfactant may be selectively added before or after pre-enzymatic hydrolysis, having economic, effective and feasible application prospects in reducing the loss of glucose, simplifying the production process, reducing equipment investment, reducing water consumption, improving ethanol production and reducing the total cost of the ethanol production process.Type: ApplicationFiled: December 29, 2014Publication date: November 9, 2017Inventors: Zongchao ZHANG, Xiumei LIU, Liaoyuan MAO
-
Patent number: 9615439Abstract: A system for forming a laser-sustained plasma includes a gas containment element, an illumination source configured to generate pump illumination, and a collector element. The gas containment element is configured to contain a volume of a gas mixture. The collector element is configured to focus the pump illumination from the pumping source into the volume of the gas mixture contained within the gas containment element in order to generate a plasma within the volume of the gas mixture that emits broadband radiation. The gas mixture filters one or more selected wavelengths of radiation emitted by the plasma.Type: GrantFiled: January 6, 2016Date of Patent: April 4, 2017Assignee: KLA-Tencor CorporationInventors: Ilya Bezel, Anatoly Shchemelinin, Kenneth P. Gross, Richard Solarz, Lauren Wilson, Rahul Yadav, Joshua Wittenberg, Anant Chimmalgi, Xiumei Liu, Brooke Bruguier
-
Publication number: 20160205758Abstract: A system for forming a laser-sustained plasma includes a gas containment element, an illumination source configured to generate pump illumination, and a collector element. The gas containment element is configured to contain a volume of a gas mixture. The collector element is configured to focus the pump illumination from the pumping source into the volume of the gas mixture contained within the gas containment element in order to generate a plasma within the volume of the gas mixture that emits broadband radiation. The gas mixture filters one or more selected wavelengths of radiation emitted by the plasma.Type: ApplicationFiled: January 6, 2016Publication date: July 14, 2016Inventors: Ilya Bezel, Anatoly Shchemelinin, Kenneth P. Gross, Richard Solarz, Lauren Wilson, Rahul Yadav, Joshua Wittenberg, Anant Chimmalgi, Xiumei Liu, Brooke Bruguier
-
Publication number: 20160194668Abstract: A surfactant-improved ethanol fermentation method comprises adding a nonionic surfactant as a protection agent of yeast cell into a fermentation culture medium, therefore greatly improving survival rate of yeast cells in very high gravity ethanol fermentation liquid and endpoint ethanol concentration. The present invention not only improves the cyclic utilization efficiency of the yeast cells, but also achieves the synchronous recycling of the surfactant and a pH adjusting agent. The process of adding the surfactant during VHG fermentation is simple, which can reduce the consumption of water and energy, effectively reduce the fuel ethanol production cost, and improve the fermentation efficiency.Type: ApplicationFiled: April 14, 2014Publication date: July 7, 2016Inventors: Zongchao ZHANG, Xiumei LIU
-
Patent number: 8355140Abstract: Systems configured to generate output corresponding to defects on a specimen and systems configured to generate phase information about defects on a specimen are provided. One system includes an optical subsystem that is configured to create interference between a test beam and a reference beam. The test beam and the reference beam are reflected from the specimen. The system also includes a detector that is configured to generate output representative of the interference between the test and reference beams. The interference increases contrast between the output corresponding to the defects and output corresponding to non-defective portions of the specimen.Type: GrantFiled: April 5, 2011Date of Patent: January 15, 2013Assignee: KLA-Tencor Technologies Corp.Inventors: Shiow-Hwei Hwang, Tao-Yi Fu, Xiumei Liu
-
Publication number: 20110181891Abstract: Systems configured to generate output corresponding to defects on a specimen and systems configured to generate phase information about defects on a specimen are provided. One system includes an optical subsystem that is configured to create interference between a test beam and a reference beam. The test beam and the reference beam are reflected from the specimen. The system also includes a detector that is configured to generate output representative of the interference between the test and reference beams. The interference increases contrast between the output corresponding to the defects and output corresponding to non-defective portions of the specimen.Type: ApplicationFiled: April 5, 2011Publication date: July 28, 2011Applicant: KLA-TENCOR TECHNOLOGIES CORPORATIONInventors: Shiow-Hwei Hwang, Tao-Yi Fu, Xiumei Liu
-
Patent number: 7952718Abstract: Mechanically robust minimal form factor OCT probes suitable for medical applications such as needle biopsy, intraluminal and intravascular imaging are achieved in part by employing compound lenses with some or all of the optical elements, including an optical fiber, to be thermally fused in tandem. To achieve a desired working distance without increasing a diameter of the optics assembly, a spacer can be disposed between the optical fiber and focusing optics. The compound lens configuration can achieve higher transverse resolution compared to a single lens at a desired working distance without increasing the probe diameter. In exemplary needle biopsy embodiments, the optical assembly is encapsulated in a glass housing or metal-like housing with a glass window, which is then selectively passed through a hollow needle. Esophageal imaging embodiments are combined with a balloon catheter. Circumferential and three-dimensional spiral scanning can be achieved in each embodiment.Type: GrantFiled: May 2, 2008Date of Patent: May 31, 2011Assignee: University of WashingtonInventors: Xingde Li, Xiumei Liu, Joo Ha Hwang
-
Patent number: 7924434Abstract: Systems configured to generate output corresponding to defects on a specimen and systems configured to generate phase information about defects on a specimen are provided. One system includes an optical subsystem that is configured to create interference between a test beam and a reference beam. The test beam and the reference beam are reflected from the specimen. The system also includes a detector that is configured to generate output representative of the interference between the test and reference beams. The interference increases contrast between the output corresponding to the defects and output corresponding to non-defective portions of the specimen.Type: GrantFiled: August 2, 2006Date of Patent: April 12, 2011Assignee: KLA-Tencor Technologies Corp.Inventors: Shiow-Hwei Hwang, Tao-Yi Fu, Xiumei Liu
-
Publication number: 20090323076Abstract: Mechanically robust minimal form factor OCT probes suitable for medical applications such as needle biopsy, intraluminal and intravascular imaging are achieved in part by employing compound lenses with some or all of the optical elements, including an optical fiber, to be thermally fused in tandem. To achieve a desired working distance without increasing a diameter of the optics assembly, a spacer can be disposed between the optical fiber and focusing optics. The compound lens configuration can achieve higher transverse resolution compared to a single lens at a desired working distance without increasing the probe diameter. In exemplary needle biopsy embodiments, the optical assembly is encapsulated in a glass housing or metal-like housing with a glass window, which is then selectively passed through a hollow needle. Esophageal imaging embodiments are combined with a balloon catheter. Circumferential and three-dimensional spiral scanning can be achieved in each embodiment.Type: ApplicationFiled: May 2, 2008Publication date: December 31, 2009Applicant: University of WashingtonInventors: Xingde Li, Xiumei Liu, Joo Ha Hwang
-
Patent number: 7616986Abstract: An optical fiber scanner is used for multiphoton excitation imaging, optical coherence tomography, or for confocal imaging in which transverse scans are carried out at a plurality of successively different depths within tissue. The optical fiber scanner is implemented as a scanning endoscope using a cantilevered optical fiber that is driven into resonance or near resonance by an actuator. The actuator is energized with drive signals that cause the optical fiber to scan in a desired pattern at successively different depths as the depth of the focal point is changed. Various techniques can be employed for depth focus tracking at a rate that is much slower than the transverse scanning carried out by the vibrating optical fiber. The optical fiber scanner can be used for confocal imaging, multiphoton fluorescence imaging, nonlinear harmonic generation imaging, or in an OCT system that includes a phase or frequency modulator and delay line.Type: GrantFiled: June 28, 2004Date of Patent: November 10, 2009Assignee: University of WashingtonInventors: Eric Seibel, Xingde Li, Xiumei Liu