Patents by Inventor Yunfeng Li
Yunfeng Li 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: 20140368124Abstract: Drivers (1) for driving light circuits (2) with light emitting diodes comprise isolation circuits (11-14) with primary parts (11,13) and secondary parts (12, 14) and guiding circuits (22, 23) for guiding common mode surge signals to reference potentials. The isolation circuits (11-14) may be designed to guide first parts of the common mode surge signals (3) away from the light circuits (2) and the guiding circuits (22, 23) may be designed to guide second parts of the common mode surge signals (3) away from the light circuits (2), the second parts being smaller than the first parts. The guiding circuit (22, 23) may comprise capacitors (22) for connecting first terminals of the secondary parts (12, 14) to the reference potentials, values of the capacitors (22) being larger than values of parasitic capacitances (41) of the isolation circuits (11-14). The driver (1) does not comprise any capacitor that interconnects the primary and secondary parts (11-14).Type: ApplicationFiled: July 3, 2013Publication date: December 18, 2014Inventors: BING LAI, BERND CLAUBERG, YUNFENG LI
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Publication number: 20140128359Abstract: The invention relates to N-heterocyclic substituent-containing antibiotics, their preparation, and their use. Disclosed are sodium and potassium salts of 7-(?-((N,N?-diisopropylamidino)thio)acetylamino)-3-(((1,2,5,6-tetrahydro-2-methyl-5,6-diox o-1,2,4-triazin-3-yl)thio)methyl) cephalosporanic acid as presented by the general structure (I), their preparation, and their use. The antibiotics of the invention can be used to treat diseases caused by Gram-positive or Gram-negative bacteria such as septicaemia, gastrointestinal tract infection, and urinary tract infection. They have increased half-life in blood and lowered toxicity. They can reduce the frequency of drug use and lower medical treatment costs. They have improved stability and can be stored at ambient temperatures. The method of the invention is simple, and it produces high purity products which can meet the requirements of clinical use.Type: ApplicationFiled: November 2, 2012Publication date: May 8, 2014Applicants: GUANGZHOU PHARMACEUTICAL INDUSTRIAL RESEARCH INSTI, GUANGZHOU BAIYUNSHAN PHARMACEUTICAL CO., LTD. GUANGZHOU BAIYUNSHAN PHARMACEUTICAL FACTORYInventors: Mao Chen, Shaoxuan Zhu, Xuebin Liu, Lizhen Zheng, Liwei Lin, Shuwen Xu, Yuping Wang, Wei Yang, Yunfeng Li, Fang Ye, Xiaona Zhang
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Publication number: 20140071791Abstract: A method, an apparatus and a computer-readable medium for processing seismic data are provided. The method includes selecting well-imaged areas of a sediment-to-salt interface, and performing (1) a dual-flood RTM with prismatic waves to identify new areas of the sediment-to-salt interface, and (2) one or more RTM to identify other new areas of the sediment-to-salt interface or of a salt-to-sediment interface.Type: ApplicationFiled: September 7, 2012Publication date: March 13, 2014Applicant: CGGVERITAS SERVICES SAInventors: Yunfeng LI, Yogesh AGNIHOTRI, Timmy DY
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Publication number: 20140049613Abstract: Systems and methods for processing a pair of 2-D images are described. In one example, a stereoscopic set of images is converted into a collection of regions that represent individual 3-D objects in the pair of images. In one embodiment, the system recovers the 3-D point P for each point p that appears in both images. It estimates the 3-D orientation of the floor plane, and the image capture planes and their height from the floor. The system then identifies the collection B of points P that do not represent points on the floor and generates a projection C of B onto a plane parallel to the floor. It blurs the projection C and identifies peaks in the blurred image, then fits symmetric figures to the points in C around the identified peaks. The system projects the 3-D figures associated with the symmetric figures back onto the 2-D images.Type: ApplicationFiled: February 24, 2012Publication date: February 20, 2014Applicant: PURDUE RESEARCH FOUNDATIONInventors: Zygmunt Pizlo, Tadamasa Sawada, Yunfeng Li
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Publication number: 20140038067Abstract: In various embodiments, the present disclosure provides a layered metal-air cathode for a metal-air battery. Generally, the layered metal-air cathode comprises an active catalyst layer, a transition layer bonded to the active catalyst layer, and a backing layer bonded to the transition layer such that the transition layer is disposed between the active catalyst layer and the backing layer.Type: ApplicationFiled: July 24, 2013Publication date: February 6, 2014Applicant: The Curators of the University of MissouriInventors: Yangchuan Xing, Kan Huang, Yunfeng Li
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Publication number: 20130231369Abstract: Provided are N-[(4-hydroxypiperidin-4-yl)methyl]pyridin-2(1H)-one derivatives represented by formula I, stereoisomers, pharmaceutically acceptable salts or solvates thereof. The above compounds have the dual activities of 5-hydroxytryptamine 1A receptor ligand and selective serotonin reuptake inhibitor. The preparation methods of the above compounds, the uses of these compounds for the prevention or treatment of nervous system diseases related to 5-hydroxytryptamine system dysfunction and the pharmaceutical compositions containing these compounds are also provided.Type: ApplicationFiled: April 8, 2011Publication date: September 5, 2013Applicant: Institute of Pharmacology and Toxicology Academy of Military Medical Sciences P.L.A. ChinaInventors: Yunfeng Li, Rifang Yang, Youzhi Zhang, Yongzhen Li, Zengliang Jin, Peng Li, Li Yuan, Liuhong Yun, Nan Zhao, Cheng Zhang, Xiaodan Xu, Rusheng Zhao, Hongxia Chen, Rui Xue, Juanjuan Qin, Zhenzhen Wang, Jiazhi Yao
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Publication number: 20130203754Abstract: Disclosed are 2-arylimidazo[1,2-a]pyridine-3-acetamide derivatives represented by formula I, their tautomer, racemate or optical isomer, their pharmaceutically acceptable salt, or their solvates, wherein R1, R2, R3 and R4 are defined as in the specification.Type: ApplicationFiled: June 9, 2011Publication date: August 8, 2013Applicant: Institute of Pharmacology and Toxicology Academy of Military Medical Sciences P.L.A. ChinaInventors: Rifang Yang, Yunfeng Li, Yongzhen Li, Nan Zhao, Liuhong Yun, Juanjuan Qin, Zhongyao Feng, Youzhi Zhang
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Patent number: 8406567Abstract: A system processes 2D images of 2D or 3D objects, creating a model of the object that is consistent with the image and as veridical as the perception of the 2D image by humans. Vertices of the object that are hidden in the image are recovered by using planarity and symmetry constraints. The 3D shape is recovered by maximizing 3D compactness of the recovered object and minimizing its surface area. In some embodiments, these two criteria are weighted by using the geometric mean.Type: GrantFiled: October 19, 2009Date of Patent: March 26, 2013Assignee: Purdue Research FoundationInventors: Zygmunt Pizlo, Tadamasa Sawada, Yunfeng Li
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Publication number: 20130071011Abstract: The present disclosure describes a system and method for transforming a two-dimensional image of an object into a three-dimensional representation, or model, that recreates the three-dimensional contour of the object. In one example, three pairs of symmetric points establish an initial relationship between the original image and a virtual image, then additional pairs of symmetric points in the original image are reconstructed. In each pair, a visible point and an occluded point are mapped into 3-space with a single free variable characterizing the mapping for all pairs. A value for the free variable is then selected to maximize compactness of the model, where compactness is defined as a function of the model's volume and its surface area. “Noise” correction derives from enforcing symmetry and selecting best-fitting polyhedra for the model. Alternative embodiments extend this to additional polyhedra, add image segmentation, use perspective, and generalize to asymmetric polyhedra and non-polyhedral objects.Type: ApplicationFiled: July 6, 2012Publication date: March 21, 2013Applicant: PURDUE RESEARCH FOUNDATIONInventors: Zygmunt Pizlo, Yunfeng Li, Robert M. Steinman
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Patent number: 8318772Abstract: The present invention relates to a new amine compound or a pharmaceutically acceptable salt thereof, wherein the definitions of X, R1, R2 and n are given in the description, to a pharmaceutical composition containing the compound as active ingredient, and to use of the amine compound or its pharmaceutically acceptable salt for the manufacture of an anti-depressent drug.Type: GrantFiled: June 23, 2009Date of Patent: November 27, 2012Assignee: Institute of Pharmacology and Toxicology Academy of Military Medical Sciences P.L.A. ChinaInventors: Bohua Zhong, Youzhi Zhang, Yanping Zhang, Rui Xue, Xinhua He, Yunfeng Li, Hongxia Chen, Nan Zhao, Meiying Li
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Patent number: 8224065Abstract: The present disclosure describes a system and method for transforming a two-dimensional image of an object into a three-dimensional representation, or model, that recreates the three-dimensional contour of the object. In one example, three pairs of symmetric points establish an initial relationship between the original image and a virtual image, then additional pairs of symmetric points in the original image are reconstructed. In each pair, a visible point and an occluded point are mapped into 3-space with a single free variable characterizing the mapping for all pairs. A value for the free variable is then selected to maximize compactness of the model, where compactness is defined as a function of the model's volume and its surface area. “Noise” correction derives from enforcing symmetry and selecting best-fitting polyhedra for the model. Alternative embodiments extend this to additional polyhedra, add image segmentation, use perspective, and generalize to asymmetric polyhedra and non-polyhedral objects.Type: GrantFiled: January 9, 2008Date of Patent: July 17, 2012Assignee: Purdue Research FoundationInventors: Zygmunt Pizlo, Yunfeng Li, Robert M. Steinman
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Publication number: 20110178127Abstract: The present invention relates to a new amine compound or a pharmaceutically acceptable salt thereof, wherein the definitions of X, R1, R2 and n are given in the description, to a pharmaceutical composition containing the compound as active ingredient, and to use of the amine compound or its pharmaceutically acceptable salt for the manufacture of an anti-depressent drug.Type: ApplicationFiled: June 23, 2009Publication date: July 21, 2011Applicant: Institute of Pharmacology and Toxicology Academy of Military Medical Sciences P.L.A. ChinaInventors: Bohua Zhong, Youzhi Zhang, Yangping Zhang, Rui Xue, Xinhua He, Yunfeng Li, Hongxia Chen, Nan Zhao, Melying Li
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Publication number: 20110165511Abstract: A method for producing an electrostatic image developing toner by: a) adding a free radical polymerizable monomer to an aqueous medium comprising dispersed wax particles containing a colorant, b) polymerizing the free radical polymerizable monomer to yield a resin particle comprising the wax and colorant, and c) agglutinating and fusing the resin particle in the aqueous medium to yield a toner. The resultant toner exhibits uniform particle size, high roll viscosity resistance, and high durability.Type: ApplicationFiled: July 8, 2010Publication date: July 7, 2011Inventors: Shunquan ZHU, Yunfeng LI
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Publication number: 20110162051Abstract: A computer readable storage medium has computer-executable instructions for causing a computer system to perform a method. The method includes receiving authentication information from an electronic device; identifying the electronic device based on device information for the electronic device; locating an entry associated with a combination of the authentication information and the electronic device, the entry including a count of the number of times the authentication information failed authentication during a specified time interval; and locking out the combination if the count reaches a threshold value, thus blocking the authentication information from accessing a target.Type: ApplicationFiled: January 20, 2010Publication date: June 30, 2011Inventors: Yunfeng LI, Ke CHEN, Cheng ZHENG
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Publication number: 20110118462Abstract: The invention relates to N-heterocyclic substituent-containing antibiotics, their preparation, and their use. Disclosed are sodium and potassium salts of 7-(?-((N,N?-diisopropylamidino)thio)acetylamino)-3-(((1,2,5,6-tetrahydro-2-methyl-5,6-dioxo-1,2,4-triazin-3-yl)thio)methyl) cephalosporanic acid as presented by the general structure (I), their preparation, and their use. The antibiotics of the invention can be used to treat diseases caused by Gram-positive or Gram-negative bacteria such as septicaemia, gastrointestinal tract infection, and urinary tract infection. They have increased half-life in blood and lowered toxicity. They can reduce the frequency of drug use and lower medical treatment costs. They have improved stability and can be stored at ambient temperatures. The method of the invention is simple, and it produces high purity products which can meet the requirements of clinical use.Type: ApplicationFiled: November 18, 2009Publication date: May 19, 2011Applicants: GUANGZHOU BAIYUNSHAN PHARMACEUTICAL CO., LTD. GUANGZHOU BAIYUNSHAN PHARMACEUTICAL FACTORY, GUANGZHOU PHARMACEUTICAL INDUSTRIAL RESEARCH INSTIInventors: Mao CHEN, Shaoxuan Zhu, Xuebin Liu, Lizhen Zheng, Liwei Lin, Shuwen Xu, Yuping Wang, Wei Yang, Yunfeng Li, Fang Ye, Xiaona Zhang
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Patent number: 7400468Abstract: A hard disk drive with a circuit that provides a control signal to a voice coil motor to move a head across a disk. The disk drive includes a circuit that provides a control signal to the voice coil motor to move the head. The circuit also has a state predictor and an inversion filter that compute a vibration estimate used to detect a vibration in the drive. When a threshold vibration is detected a vibration estimate is combined with the control signal to compensate for the vibration. The circuit detects the vibration without the need for an accelerometer or other sensor.Type: GrantFiled: November 22, 2006Date of Patent: July 15, 2008Assignee: Samsung Electronics Co., Ltd.Inventors: Chang-Ik Kang, Yunfeng Li, Bong-Jin Lee
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Publication number: 20080166065Abstract: The present disclosure describes a system and method for transforming a two-dimensional image of an object into a three-dimensional representation, or model, that recreates the three-dimensional contour of the object. In one example, three pairs of symmetric points establish an initial relationship between the original image and a virtual image, then additional pairs of symmetric points in the original image are reconstructed. In each pair, a visible point and an occluded point are mapped into 3-space with a single free variable characterizing the mapping for all pairs. A value for the free variable is then selected to maximize compactness of the model, where compactness is defined as a function of the model's volume and its surface area. “Noise” correction derives from enforcing symmetry and selecting best-fitting polyhedra for the model. Alternative embodiments extend this to additional polyhedra, add image segmentation, use perspective, and generalize to asymmetric polyhedra and non-polyhedral objects.Type: ApplicationFiled: January 9, 2008Publication date: July 10, 2008Inventors: Zygmunt Pizlo, Yunfeng Li, Robert M. Steinman
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Patent number: 7382570Abstract: Methods of controlling seeking of a transducer that is adjacent to a rotatable disk in a disk drive are disclosed. The methods may include accelerating the transducer radially across the rotatable disk from an initial track on the rotatable disk toward a destination track on the rotatable disk, estimating a deceleration switching position/velocity point, estimating a maximum deceleration position/velocity point following the deceleration switching position/velocity point, and estimating a deceleration current required to decelerate the transducer from a non-zero velocity at the maximum deceleration position/velocity point to zero velocity at the destination track. The estimated deceleration current is compared to a maximum available deceleration current, and responsive to a determination that the current required to decelerate the transducer from the maximum deceleration point to the destination track exceeds the maximum available deceleration current, the estimated deceleration switching point is adjusted.Type: GrantFiled: June 9, 2006Date of Patent: June 3, 2008Assignee: Maxtor CorporationInventors: Yunfeng Li, Yu Sun
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Publication number: 20080117540Abstract: A hard disk drive with a circuit that provides a control signal to a voice coil motor to move a head across a disk. The disk drive includes a circuit that provides a control signal to the voice coil motor to move the head. The circuit also has a state predictor and an inversion filter that compute a vibration estimate used to detect a vibration in the drive. When a threshold vibration is detected a vibration estimate is combined with the control signal to compensate for the vibration. The circuit detects the vibration without the need for an accelerometer or other sensor.Type: ApplicationFiled: November 22, 2006Publication date: May 22, 2008Applicant: Samsung Electronics Co., Ltd.Inventors: Chang-Ik Kang, Yunfeng Li, Bong-Jin Lee
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Patent number: 7375911Abstract: A hard disk drive is disclosed comprising at least one disk rotatable about an axis, an actuator assembly moveable relative to the disk, a transducer positioned on the actuator assembly, an actuator signal line, a piezoelectric actuator element disposed on the actuator assembly and electrically interconnected to the actuator signal line, a processor, a sensor signal line and a piezoelectric sensor element for sensing a vibration. The piezoelectric sensor element is collocated with the piezoelectric actuator element and electrically interconnected to the processor by the sensor signal line. The piezoelectric actuator element is operable to move the at least one transducer relative to a surface of the disk. The piezoelectric sensor element is electrically isolated from the piezoelectric actuator element. A method for detecting a vibration in a hard disk drive actuator assembly is also disclosed.Type: GrantFiled: November 24, 2004Date of Patent: May 20, 2008Assignee: Maxtor CorporationInventors: Yunfeng Li, Wei Guo, Lin Guo, Yu Sun