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David Zhang
David Zhang, Hong Kong HK
| Patent application number | Description | Published |
|---|---|---|
| 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
| Patent application number | Description | Published |
|---|---|---|
| 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
| Patent application number | Description | Published |
|---|---|---|
| 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
| Patent application number | Description | Published |
|---|---|---|
| 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
| Patent application number | Description | Published |
|---|---|---|
| 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 |