David Zhang
David Zhang, Hong Kong HK
Patent application number | Description | Published |
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20090268951 | METHOD AND SYSTEM FOR PERSONAL IDENTIFICATION USING 3DPALMPRINT IMAGING - A biometric identification system ( | 10-29-2009 |
20090296994 | METHOD AND SYSTEM FOR IDENTIFYING A PERSON BASED ON THEIR TONGUE - A method for identifying a person based on their tongue is provided in which an image of a tongue of a person is compared to recorded details of tongues in a database. If a match is found, the person is identified. | 12-03-2009 |
20090310831 | PARTIAL FINGERPRINT RECOGNITION - A method for partial fingerprint recognition, the method comprising the steps of extracting features including ridge orientations, valley images, minutiae, and pores from at least two fingerprint fragments, aligning the fingerprint fragments, matching the pores and minutiae on the fingerprint fragments after applying estimated alignment transformation, calculating a final matching score based on a pore matching score and a minutiae matching score, identifying a person based on a result of the final matching score. | 12-17-2009 |
20100045788 | Method and Apparatus for Personal Identification Using Palmprint and Palm Vein - A method of personal identification includes switching between visible and near infrared light, acquiring palmprint image and palm vein image from a person under the visible and the near infrared light, extracting sub-images from the palmprint image and the palm vein image based on a region of interest, extracting multiple features from the sub-images, and matching the extracted multiple features with stored information in a database to authenticate the person. | 02-25-2010 |
20100177937 | METHOD AND SYSTEM FOR IDENTIFYING A PERSON USING THEIR FINGER-JOINT PRINT - A method for identifying a person using their finger-joint print including the outer skin around the proximal interphalangeal joint of a finger, the method comprising: capturing ( | 07-15-2010 |
David Zhang, Sydney AU
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20090199185 | Affordances Supporting Microwork on Documents - Microwork customers may create microtasks and publish them with a microwork broker. Microwork providers may discover published microtasks and complete them in exchange for specified compensation. Microtask creation, publication, discovery and workflow facilities may be integrated into document editors, productivity tools, and the like. To facilitate trust and efficiency, particularly in the context of large public microwork brokers, public reputations may be maintained for microwork participants by the microwork broker. Distinct reputations may be maintained with respect to particular microwork categories. Discovery of microtasks, access to microtasks, selection of providers, and even compensation may be based on reputation. Microwork confidentially mechanisms, such as controlled access to specified portions of a microtask, or anonymization of portions of a workpiece not salient to a particular microtask, may be employed to protect potentially sensitive information while still taking advantage of the services of public microwork providers. | 08-06-2009 |
David Zhang, Overland Park, KS US
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20090191546 | ENGINEERED TOEHOLD REACTIONS AND NETWORKS - A catalytic system and method of catalyzing reactions that uses a novel toehold exchange mechanism that allows a specified input to catalyze the release of a specified output, which in turn can serve as a catalyst for other reactions is provided. This toehold exchange catalyst system, which can be driven forward by the configurational entropy of the released molecule, provides an amplifying circuit element that is simple, fast, modular, composable, and robust. Using this toehold exchange catalyst system it has been possible to construct and characterize several circuits that amplify nucleic acid signals, including a feed-forward cascade with quadratic kinetics and a positive feedback circuit with exponential growth kinetics. | 07-30-2009 |
20110306758 | METHOD AND MATERIALS FOR THE COOPERATIVE HYBRIDIZATION OF OLIGONUCLEOTIDES - A two-stranded intermediary complex and cooperative hybridization method are provided. The complex has been designed so that target oligonucleotides of independent sequence can cooperatively and simultaneously hybridize to it. The cooperative hybridization mechanism is robust and modular, smoothly integrating with other dynamic DNA components to form cascaded reaction networks that can perform a variety of functions. | 12-15-2011 |
David Zhang, Hacienda Hts, CA US
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20080230285 | Multimodal agile robots - Examples and implementations of various robotic mechanisms, apparatus, systems and techniques including multimodal robotic devices and systems | 09-25-2008 |
David Zhang, Berkeley, CA US
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20110313736 | Method and Algorithm for Modeling and Simulating A Discrete-Event Dynamic System - A method for modeling, visualizing and simulating a large-scale discrete-event dynamic system, comprising the steps of expressing an algorithm that models a plurality of activity interactions, determining a plurality of possible relationships between a plurality of system elements including transient entities, resident entities, or both, providing a hierarchical mapping of the plurality of system elements and the plurality of possible relationships among the plurality of system elements, representing a relationship diagram as a graph notation where an activity or a system element is visualized as a node and the plurality of possible relationships among the activity or the system element as an arc, allowing an explicit description of the plurality of possible relationships among the activity or the system element and a plurality of possible ways in which the activity can begin and a sequence of activities, and representing an activity interaction matrix that categorizes the plurality of activity interactions. | 12-22-2011 |
David Zhang, Bloomfield, MI US
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20130270801 | AIRBAG TEAR SEAM TAPE - A vehicle interior panel for use over an airbag includes a covering disposed over a substrate. The covering includes a decorative layer with an inner surface that faces the substrate and an opposite decorative surface. A non-visible tear seam is formed at the inner surface of the decorative layer. Tear seam tape is attached to the inner surface of the decorative layer along at least a portion of the tear seam to hold the decorative layer together at the tear seam. The tear seam tape can help prevent the tear seam from becoming visible at the decorative surface. | 10-17-2013 |
David Zhang, Shanghai CN
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20140111106 | BALLAST WITH TEMPERATURE COMPENSATION - A ballast for driving a gas discharge lamp includes an inverter configured to generate a lamp supply voltage signal, and a voltage regulator coupled to the inverter and configured to generate a regulation signal. The regulation signal is used by the inverter to maintain the lamp voltage signal at a substantially constant voltage. A thermistor circuit is coupled between the lamp supply voltage signal and the voltage regulator and configured to detect a temperature of the ballast. The lamp supply voltage signal is varied by the regulation signal in accordance with the detected temperature of the ballast. | 04-24-2014 |
David Zhang, Kunshan City CN
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20140191457 | WIRE HOLDER AND METHOD OF TERMINATING WIRE CONDUCTORS - A wire holder for managing and aligning wires to corresponding traces in a PCB. The wire holder assists in the manufacturing process of cables and connectors, and especially during the welding process by minimizing the amount of time spent by users manually adjusting the wire positions. The wire holder includes a shaft having a plurality of teeth and claws forming a plurality of comb openings that may either be open so wires can be inserted sideways or closed so wires must be inserted into the comb openings. The plurality of wires are collected into the wire holder and the wire holder is subsequently aligned with the corresponding traces on the PCB prior to the welding of the wires. The wire holder may align wires for double sided PCBs. | 07-10-2014 |
David Zhang, Edwardsville, IL US
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20140311041 | INTERMEDIATE MEMBER FOR EXTENDING THE DEPTH OF A WINDOW OR DOOR AND WINDOW OR DOOR CONSTRUCTED WITH SAME - A window or door is constructed to accept one or more intermediate pieces which may be used for adjusting the depth of the window or door. The intermediate piece includes, on one side, a first hook and an outrigger, and on the other side, a second hook and structure defining an outrigger receiving slot. The intermediate pieces lockingly and securely mate with the interior and exterior sections of the windows or doors. | 10-23-2014 |
David Zhang, Houston, TX US
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20150147756 | Sensor Device and Method for Label-Free Detecting of Nucleic Acid Sequences - A sensor device ( | 05-28-2015 |
David Zhang, San Francisco, CA US
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20150248689 | SYSTEMS AND METHODS FOR PROVIDING TRANSPORTATION DISCOUNTS - Systems and methods for providing transportation discounts are disclosed. A server receives, from a client device of a user, a request for a transportation service. In response, the server identifies that the request relates to a particular characteristic associated with modified pricing. The server then calculates an adjusted price for the transportation service based on the modified pricing associated with the particular characteristic. | 09-03-2015 |
David Zhang, Mountain View, CA US
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20160127855 | Proximity Based Content Sharing - A sharing user of a content management system can request to share a content item in his namespace. When such a request is made, the sharing user's client device broadcasts a notification that can be received by devices that are within a limited broadcast range of the sharing client device. A receiving user's client device that is within the limited broadcast range of the sharing client device receives the broadcasted notification. Based on the notification, the receiving client device obtains a token from the sharing client device that identifies the content item being shared by the sharing user. At the request of the receiving user, the receiving client device transmits the token to the content management system and requests that the content management system add the shared content item to the receiving user's namespace with the system. The receiving user can then access the item from his namespace. | 05-05-2016 |