Patents by Inventor Qingfeng Yu
Qingfeng Yu 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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Patent number: 11850618Abstract: A nozzle assembly, an ejecting device and an ejecting method are provided. The nozzle assembly includes an electrode and an insulating body portion. A first fluid channel is arranged in the insulating body portion, an opening is formed on the inner surface. A second fluid channel is arranged between the inner surface of the insulating body portion and the side surface of the electrode. An ejecting outlet is formed on the outer end surface. The second fluid channel is communicated with the first fluid channel at the opening. At least part of the second fluid channel is located between the first fluid channel and the electrode. In the first direction, the opening is located between the first end surface and the second end surface of the electrode.Type: GrantFiled: November 24, 2020Date of Patent: December 26, 2023Assignee: YANTAI JEREH PETROLEUM EQUIPMENT & TECHNOLOGIES CO., LTD.Inventors: Yushuai Ge, Fengwen Liu, Shiqi Li, Mingming Yu, Qingfeng Yu
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Publication number: 20220339646Abstract: An electrostatic spray device, including: a housing, a tubular member, a nozzle and an airflow providing member. In a first direction from a second end portion to a first end portion of the housing, a second opening of the tubular member is located at a side of a first opening of the housing away from the second end portion. The nozzle is at least partially located in a second accommodating space defined by the tubular member. The nozzle is configured to spray mist towards the second opening through a spray opening, and the mist leaves the electrostatic spray device from the second opening in a charged state. The airflow providing member is configured to provide airflow towards the first opening and the second opening.Type: ApplicationFiled: April 19, 2021Publication date: October 27, 2022Applicant: YANTAI JEREH PRETROLEUM EQUIPMENT & TECHNOLOGIES CO., LTD.Inventors: Mingming YU, Yushuai GE, Fengwen LIU, Qingfeng YU
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Publication number: 20220314248Abstract: A nozzle assembly, an ejecting device and an ejecting method are provided. The nozzle assembly includes an electrode and an insulating body portion. A first fluid channel is arranged in the insulating body portion, an opening is formed on the inner surface. A second fluid channel is arranged between the inner surface of the insulating body portion and the side surface of the electrode. An ejecting outlet is formed on the outer end surface. The second fluid channel is communicated with the first fluid channel at the opening. At least part of the second fluid channel is located between the first fluid channel and the electrode. In the first direction, the opening is located between the first end surface and the second end surface of the electrode.Type: ApplicationFiled: November 24, 2020Publication date: October 6, 2022Applicant: JEREH C-CREATE TECHNOLOGY CO., LTD.Inventors: Yushuai GE, Fengwen LIU, Shiqi LI, Mingming YU, Qingfeng YU
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Patent number: 9626577Abstract: A system that selects image frames from a video feed for recognition of objects (such as physical objects, text characters, or the like) within the image frames. The individual frames are selected using robust historical metrics that compare individual metrics of the particular image (such as focus, motion, intensity, etc.) to similar metrics of previous image frames in the video feed. The system will select the image frame for object recognition if the image frame is relatively high quality, that is the image frame is suitable for a later object recognition processing.Type: GrantFiled: September 15, 2014Date of Patent: April 18, 2017Assignee: AMAZON TECHNOLOGIES, INC.Inventors: Qingfeng Yu, Yue Liu
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Patent number: 9617808Abstract: The continuous oil pipe clamp mechanism includes a saddle-shaped clamp block and a clamp block seat. The saddle-shaped clamp block is buckled on the clamp block seat. The saddle-shaped clamp block includes a saddle-shaped clamp portion and a bottom, wherein the bottom has a clamp groove, and tongue platforms are arranged at two ends of the clamp groove. The clamp block seat includes a fit portion fitted to the saddle-shaped clamp block, wherein the fit portion is provided with a sunk groove matched with the clamp groove and pairs of bosses. Grooves matched with the tongue platforms are formed between the pairs of bosses. The clamp groove is buckled in the sunk groove, and the tongue platforms are arranged in the grooves and are limited by stop pins. The mechanism facilitates replacement of the clamp block, enabling an injection head to be stable in continuous work and convenient to maintain.Type: GrantFiled: November 29, 2012Date of Patent: April 11, 2017Assignees: YANTAI JEREH OILFIELD SERVICES GROUP Co., Ltd., YANTAI JEREH PETROLEUM EQUIP. AND TECH. Co., Ltd.Inventors: Dong Liu, Qingfeng Yu, Jilei Fang
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Patent number: 9576210Abstract: A system to select video frames for optical character recognition (OCR) based on feature metrics associated with blur and sharpness. A device captures a video frame including text characters. An edge detection filter is applied to the frame to determine gradient features in perpendicular directions. An “edge map” is created from the gradient features, and points along edges in the edge map are identified. Edge transition widths are determined at each of the edge points based in local intensity minimum and maximum on opposite sides of the respective edge point in the frame. Sharper edges have smaller edge transition widths than blurry images. Statistics are determined from the edge transition widths, and the statistics are processed by a trained classifier to determine if the frame is or is not sufficiently sharp for text processing.Type: GrantFiled: September 29, 2014Date of Patent: February 21, 2017Assignee: AMAZON TECHNOLOGIES, INC.Inventors: Yue Liu, Qingfeng Yu, Xing Liu, Pradeep Natarajan
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Patent number: 9493997Abstract: A floating clamping device for an injection head of a continuous oil pipe, including a drive sprocket, a transmission chain, a supporting plate, a pushing plate, clamping oil cylinders and a clamping assembly. At least two clamping oil cylinders are installed on the supporting plate fixedly. The pushing plate is fixed on the supporting plate through a pin shaft. The clamping assembly includes a saddle-shaped clamping block, a clamping block seat and rollers which are mounted on the clamping block seat. The clamping assembly is mounted on the transmission chain. A piston rod of the clamping oil cylinder is pressed on one face of the pushing plate, while the other face of the pushing plate is pressed on the rollers. The pushing plate has a simple structure and is convenient for maintenance; the clamping device has a compact structure and a reduced volume.Type: GrantFiled: March 21, 2011Date of Patent: November 15, 2016Assignee: YANTAI JEREH OIL-FIELD SERVICES GROUP CO., LTDInventors: Dong Liu, Qingfeng Yu, Jilei Fang
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Patent number: 9418316Abstract: A process for training and optimizing a system to select video frames for optical character recognition (OCR) based on feature metrics associated with blur and sharpness. A set of image frames are subjectively labelled based on a comparison of each frame before and after binarization to determine to what degree text is recognizable in the binary image. A plurality of different sharpness feature metrics are generated based on the original frame. A classifier is then trained using the feature metrics and the subjective labels. The feature metrics are then tested for accuracy and/or correlation with subjective labelling data. The set of feature metrics may be refined based on which metrics produce the best results.Type: GrantFiled: September 29, 2014Date of Patent: August 16, 2016Assignee: AMAZON TECHNOLOGIES, INC.Inventors: Yue Liu, Qingfeng Yu, Xing Liu, Pradeep Natarajan
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Patent number: 9367736Abstract: A multi-orientation text detection method and associated system is disclosed that utilizes orientation-variant glyph features to determine a text line in an image regardless of an orientation of the text line. Glyph features are determined for each glyph in an image with respect to a neighboring glyph. The glyph features are provided to a learned classifier that outputs a glyph pair score for each neighboring glyph pair. Each glyph pair score indicates a likelihood that the corresponding pair of neighboring glyphs form part of a same text line. The glyph pair scores are used to identify candidate text lines, which are then ranked to select a final set of text lines in the image.Type: GrantFiled: September 1, 2015Date of Patent: June 14, 2016Assignee: Amazon Technologies, Inc.Inventors: Thibaud Senechal, Quan Wang, Daniel Makoto Willenson, Shuang Wu, Yue Liu, Shiv Naga Prasad Vitaladevuni, David Paul Ramos, Qingfeng Yu
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Publication number: 20150204148Abstract: The continuous oil pipe clamp mechanism includes a saddle-shaped clamp block and a clamp block seat. The saddle-shaped clamp block is buckled on the clamp block seat. The saddle-shaped clamp block includes a saddle-shaped clamp portion and a bottom, wherein the bottom has a clamp groove, and tongue platforms are arranged at two ends of the clamp groove. The clamp block seat includes a fit portion fitted to the saddle-shaped clamp block, wherein the fit portion is provided with a sunk groove matched with the clamp groove and pairs of bosses. Groves matched with the tongue platforms are formed between the pairs of bosses. The clamp groove is buckled in the sunk groove, and the tongue platforms are arranged in the grooves and are limited by stop pins. The mechanism facilitates replacement of the clamp block, enabling an injection head to be stable in continuous work and convenient to maintain.Type: ApplicationFiled: November 29, 2012Publication date: July 23, 2015Inventors: Dong Liu, Qingfeng Yu, Jilei Fang
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Publication number: 20140000868Abstract: A floating clamping device for an injection head of a continuous oil pipe, including a drive sprocket, a transmission chain, a supporting plate, a pushing plate, clamping oil cylinders and a clamping assembly. At least two clamping oil cylinders are installed on the supporting plate fixedly. The pushing plate is fixed on the supporting plate through a pin shaft. The clamping assembly includes a saddle-shaped clamping block, a clamping block seat and rollers which are mounted on the clamping block seat. The clamping assembly is mounted on the transmission chain. A piston rod of the clamping oil cylinder is pressed on one face of the pushing plate, while the other face of the pushing plate is pressed on the rollers. The pushing plate has a simple structure and is convenient for maintenance; the clamping device has a compact structure and a reduced volume.Type: ApplicationFiled: March 21, 2011Publication date: January 2, 2014Applicant: YANTAI JEREH OIL-FIELD SERVICES GROUP CO., LTDInventors: Dong Liu, Qingfeng Yu, Jilei Fang
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Patent number: 8572233Abstract: A method and system for site path evaluation using web session clustering is provided. The method identifies properties of a plurality of web site traversal paths. Data is acquired from a plurality of sessions corresponding to at least a portion of the plurality of web page traversal paths. Portions of the web site traversal paths are grouped into a unified web page category. The plurality of sessions is clustered into a plurality of web session clusters according to a similarity measure. One of the plurality of web session clusters most closely exhibiting at least one predefined metric is selected for analysis of the propertied of a web page traversal path contained therein. A system includes a plurality of web pages, a monitoring program and a computational process configured to receive data and identify properties of the plurality of traversal paths.Type: GrantFiled: July 15, 2004Date of Patent: October 29, 2013Assignee: Hewlett-Packard Development Company, L.P.Inventors: Qingfeng Yu, Choudur K. Lakshminarayan, Alan Benson
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Patent number: 8396737Abstract: Systems, methods, media, and other embodiments associated with predicting website user satisfaction based on current actions analyzed in light of combined quantitative and qualitative data are described. One example system embodiment includes logic for acquiring both quantitative website usage data and qualitative website satisfaction data. The example system also includes logic for creating a satisfaction categorization data from the quantitative website usage data and the qualitative website satisfaction data.Type: GrantFiled: February 21, 2006Date of Patent: March 12, 2013Assignee: Hewlett-Packard Development Company, L.P.Inventors: Choudur K. Lakshminarayan, Alan E. Benson, Qingfeng Yu
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Publication number: 20070198321Abstract: Systems, methods, media, and other embodiments associated with predicting website user satisfaction based on current actions analyzed in light of combined quantitative and qualitative data are described. One example system embodiment includes logic for acquiring both quantitative website usage data and qualitative website satisfaction data. The example system also includes logic for creating a satisfaction categorization data from the quantitative website usage data and the qualitative website satisfaction data.Type: ApplicationFiled: February 21, 2006Publication date: August 23, 2007Inventors: Choudur Lakshminarayan, Alan Benson, Qingfeng Yu
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Publication number: 20060015504Abstract: A method and system for site path evaluation using web session clustering is provided. The method identifies properties of a plurality of web site traversal paths. Data is acquired from a plurality of sessions corresponding to at least a portion of the plurality of web page traversal paths. Portions of the web site traversal paths are grouped into a unified web page category. The plurality of sessions is clustered into a plurality of web session clusters according to a similarity measure. One of the plurality of web session clusters most closely exhibiting at least one predefined metric is selected for analysis of the propertied of a web page traversal path contained therein. A system includes a plurality of web pages, a monitoring program and a computational process configured to receive data and identify properties of the plurality of traversal paths.Type: ApplicationFiled: July 15, 2004Publication date: January 19, 2006Inventors: Qingfeng Yu, Choudur Lakshminarayan, Alan Benson
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Publication number: 20050114382Abstract: One exemplary method comprises a method for grouping a plurality of data elements of a dataset. The method includes clustering the dataset into a plurality of clusters with each of the plurality of clusters including at least one of the plurality of data elements. The method further includes iteratively classifying the plurality of clusters into a plurality of classes of like data elements.Type: ApplicationFiled: June 18, 2004Publication date: May 26, 2005Inventors: Choudur Lakshminarayan, Pramond Singh, Qingfeng Yu
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Patent number: D924336Type: GrantFiled: December 29, 2020Date of Patent: July 6, 2021Inventor: Qingfeng Yu
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Patent number: D924980Type: GrantFiled: December 29, 2020Date of Patent: July 13, 2021Inventor: Qingfeng Yu
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Patent number: D944332Type: GrantFiled: February 3, 2021Date of Patent: February 22, 2022Inventor: Qingfeng Yu
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Patent number: D948630Type: GrantFiled: January 29, 2021Date of Patent: April 12, 2022Inventor: Qingfeng Yu