Patents Assigned to Hong Kong University of Science and Technology
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Publication number: 20120057513Abstract: The disclosed subject matter relates to energy efficiency in mobile devices associated with a wireless communications environment. Power Saving Classes (PSCs) aim to reduce the power consumption of mobile devices based on the different types of traffic. Optimizing sleep mode selection schemes so as to maximize the energy efficiency while providing a QoS guarantee can be accomplished with optimization of a theoretical framework based on the semi-Markov Decision Process along with a performance evaluation on the sleep mode operation. A novel Policy Optimization algorithm is capable of finding optimized policies for a selection of different PSCs.Type: ApplicationFiled: December 1, 2010Publication date: March 8, 2012Applicant: THE HONG KONG UNIVERSITY OF SCIENCE AND TECHNOLOGYInventors: Lei Kong, Ka Wai Wong, Danny Hin Kwok Tsang
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Publication number: 20120058472Abstract: A method for electrochemically or electrically detecting nucleic acids, utilizes electrochemically active or electrically conductive reporter materials. An electric voltage is applied and electric signals are measured to the electrodes that are suitable for detecting or quantifying the nucleic acid(s) in a sample. This technique is suitable for point-of-use applications, e.g. detecting bioanalytes in remote locations. A microchip, device, kit used adapted to be used for this method is also disclosed.Type: ApplicationFiled: June 27, 2011Publication date: March 8, 2012Applicant: The Hong Kong University of Science and TechnologyInventors: I Ming Hsing, Ming Hung Thomas Lee, Xiaoteng Luo
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Patent number: 8129111Abstract: The presently described subject matter is directed to water-soluble conjugated polyene compounds that exhibit aggregation induced emission, as well as to water dispersible, fluorescent, polymeric microparticles and/or nanoparticles comprising the water-soluble conjugated polyene compounds. Also provided are methods of making and using the compounds and particles. The described conjugated polyene compounds are useful as bioprobes for the detection biomacromolecules, as well as in the manufacture of sensors.Type: GrantFiled: May 26, 2009Date of Patent: March 6, 2012Assignee: The Hong Kong University of Science and TechnologyInventors: Benzhong Tang, Yuning Hong, Matthias Haeussler, Hui Tong, Yongqiang Dong, Zhen Li, Changmin Xing
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Patent number: 8120735Abstract: Pixels of an LCD are divided into two sub-pixels, one for a reflective mode and one for a transmittive mode. The cell gaps of both sub-pixels are the same, improving fabrication ease. A novel photoalignment technique is used together with a shadow mask in an embodiment of the invention. Double exposure of the alignment layer with different orientations produces different alignment directions, thereby achieving the different LCD modes for the sub-pixels.Type: GrantFiled: December 10, 2008Date of Patent: February 21, 2012Assignee: The Hong Kong University of Science and TechnologyInventors: Hoi Sing Kwok, Vladimir Grigorievich Chigrinov
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Publication number: 20120041722Abstract: The subject disclosure relates to generating models from images. In an aspect, multi-view semantic segmentation is provided to recognize and segment images at the pixel level into semantically meaningful areas, and which can provide labels with a specific object class. In further aspects, a partition scheme is provided that can separate objects into independent blocks using major line structures of a scene. In addition, an inverse patch-based orthographic composition and structure analysis on a block is provided that can regularize noisy and missing reconstructed 3D data to facilitate image-based modeling.Type: ApplicationFiled: February 3, 2010Publication date: February 16, 2012Applicant: THE HONG KONG UNIVERSITY OF SCIENCE AND TECHNOLOGYInventors: Long Quan, Jianxiong Xiao, Tian Fang, Peng Zhao
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Publication number: 20120020530Abstract: The subject disclosure relates to motion estimation and compensation of feature-motion decorrelation. In an aspect, coupled filtering can be employed to solve feature-motion decorrelation problems. In further aspects, a linear convolution model can be employed to model image variation caused by motion, and an image before motion and a warped image after motion can be filtered with a pair of filters having motion parameters shared with a tissue motion model. Compensation of feature-motion decorrelation in ultrasound images demonstrates various aspects of the subject disclosure.Type: ApplicationFiled: April 12, 2010Publication date: January 26, 2012Applicant: THE HONG KONG UNIVERSITY OF SCIENCE AND TECHNOLOGYInventors: Weichuan Yu, Tianzhu Liang
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Publication number: 20120002567Abstract: Systems, methods, and apparatus are described that that increase throughput of a WiFi network. A first method is provided wherein access points monitor and keep track of their states on each resource block (frequency channel and antenna pattern) associated therewith and dynamically select the resource blocks that increase network throughput based on the instantaneous states of the access points. A second method is provided comprising employing Q-learning to determine one or more modifications of operating parameters of a network node based on observed throughput of the network and implementing the one or more modifications at the node. A third method is also provided which combines the first and second methods so as to increase network throughput at both the physical layer and the MAC layer.Type: ApplicationFiled: June 30, 2011Publication date: January 5, 2012Applicant: THE HONG KONG UNIVERSITY OF SCIENCE AND TECHNOLOGYInventors: Jiatong SUN, Vincent Kin Nang LAU
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Patent number: 8088676Abstract: Crystallization-inducing metal elements are introduced onto an amorphous silicon thin film. A first, low-temperature, heat-treatment induces nucleation of metal-induced crystallization (MIC), resulting in the formation of small polycrystalline silicon “islands”. A metal-gettering layer is formed on the resulting partially crystallized thin film. A second, low-temperature, heat-treatment completes the MIC process, whilst gettering metal elements from the partially crystallized thin film. The process results in the desired polycrystalline silicon thin film.Type: GrantFiled: April 27, 2006Date of Patent: January 3, 2012Assignee: The Hong Kong University of Science and TechnologyInventors: Man Wong, Hoi-Sing Kwok, Zhiguo Meng, Dongli Zhang, Xuejie Shi
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Publication number: 20110305189Abstract: Systems, methods, and computer-readable media for exploiting buffers in cognitive multi-relay systems for communicating delay sensitive application are presented herein. A secondary receiver device can select a first proximate relay station based on an assessment of communication links that extend from the first proximate relay station to the secondary receiver, and a secondary transmitter device that selects a second proximate relay station based on an evaluation of communication links that extend from the secondary transmitter and the second proximate relay station, wherein the first proximate relay station is employed by the secondary receiver device to communicate with the secondary transmitter device and the second proximate relay station is utilized by the secondary transmitter to communicate with the secondary receiver.Type: ApplicationFiled: May 25, 2011Publication date: December 15, 2011Applicant: THE HONG KONG UNIVERSITY OF SCIENCE AND TECHNOLOGYInventors: Yan Chen, Vincent Kin Nang Lau, Shunqing Zhang, Peiliang Qiu
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Publication number: 20110307656Abstract: Lookup techniques are described, which can achieve improvements in energy efficiency, speed, and cost, of IP address lookup, for example, in devices and systems employing ternary content addressable memory (TCAM). The disclosed subject matter describes dividing a route table into several sub-tries with disjoint range boundaries. In addition, the disclosed subject matter describes storing sub-tries of a route table between a TCAM and a faster and less costly memory. The disclosed details enable various refinements and modifications according to system design and tradeoff considerations.Type: ApplicationFiled: June 14, 2011Publication date: December 15, 2011Applicant: THE HONG KONG UNIVERSITY OF SCIENCE AND TECHNOLOGYInventors: Mounir Hamdi, Dong Lin
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Publication number: 20110298549Abstract: A tunable multiphase ring oscillator includes a plurality of stages connected in series in a ring structure, where each stage generating a stage output from a stage input. Each stage of the tunable multiphase ring oscillator includes a plurality of trans-conductance cells, each generating an output from at least one portion of the stage input. Each stage further includes at least one phase shifting module for imparting at least one phase shift to the at least one portion of the stage input, an oscillator unit for generating the stage output from a combination of the plurality of outputs, and means for varying at least one of the plurality outputs so as to adjust a phase of the stage output.Type: ApplicationFiled: June 8, 2010Publication date: December 8, 2011Applicant: The Hong Kong University of Science and TechnologyInventors: Howard Cam Luong, Sujiang Rong
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Publication number: 20110293012Abstract: Provided is sub-block motion estimation that includes a full search with a reduced search area around a motion vector predictor. Also provided are a single (or unified) motion vector predictor and a function similar to a rate-distortion cost function. Also provided is a scanning order that can reduce or substantially eliminated redundant data loading and/or that can achieve different data re-use ratio. Further, provided herein is a reconfigurable multi-resolution motion vector re-use hardware architecture based on a single motion vector predictor and a function similar to a rate-distortion cost function. Further, through utilization of the disclosed aspects, only a small number of past motion vectors are propagated and the disclosed aspects can be reconfigured for video with different spatial resolution.Type: ApplicationFiled: May 27, 2011Publication date: December 1, 2011Applicant: THE HONG KONG UNIVERSITY OF SCIENCE AND TECHNOLOGYInventors: Oscar Chi Lim AU, Xing WEN, Jiang XU
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Publication number: 20110291019Abstract: The invention provides a CMOS CT detector design with high linearity, quantum-limited noise, good scalability, high fill factor with a single CMOS chip utilizing synchronous partial quantization. The CMOS CT detector includes a pixel array, digital column buses, analog column buses, column processing circuits, a shift register, a control signal generation circuit, and a reference generation circuit, and implements a synchronous partial quantization scheme with reset, integration and analog readout phases. Each pixel of the pixel array further includes a photodiode; an integration capacitor; an OPAMP; a reset switch; a comparator; a 1-bit dynamic random-access-memory (DRAM) cell; a circuit block for enabling subtraction of a substantially fixed amount of charge from the integrated photocharge if the integrated photovoltage increases beyond the reference voltage; an integration node; an analog buffer; and a switch coupled between the output of the DRAM cell and the digital column bus.Type: ApplicationFiled: May 25, 2011Publication date: December 1, 2011Applicant: The Hong Kong University of Science and TechnologyInventors: Jie Yuan, Bing Liu
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Publication number: 20110291807Abstract: The present invention provides an ultra-low power embedded CMOS temperature sensor based on serially connected subthreshold MOS operation particularly well suited for passive RFID food monitoring applications. Employing serially connected subthreshold MOS as sensing element enables reduced minimum supply voltage for further power reduction, which is very important in passive RFID applications. The temperature sensor may be part of a passive RFID tag and incorporates a temperature sensor core, proportional-to-absolute-temperature (PTAT) and complimentary-to-absolute-temperature (CTAT) delay generators, and a time-to-digital differential readout circuit. In one embodiment, the sensor is embedded inside a passive UHF RFID tag fabricated with a conventional 0.18 ?m 1P6M CMOS process. With the sensor core working under 0.5 V and digital interfacing under 1 V, the sensor dissipates a measured total power of 119 nW at 33 samples/s and achieves an inaccuracy of +1/?0.8° C. from ?10° C. to 30° C. after calibration.Type: ApplicationFiled: May 27, 2011Publication date: December 1, 2011Applicant: The Hong Kong University of Science and TechnologyInventors: Man Kay Law, Amine Bermak, Howard Cam Luong
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Publication number: 20110285928Abstract: The invention relates to liquid crystal display cells with fast response and continuous gray scale. The liquid crystal cell is based on a field-sequential color system (“FSC”) and comprises a chiral smectic liquid crystal whose helix pitch is less than thickness of liquid crystal layer placed between two polarizers, as well as a source of voltage applied to electrodes of the cell, wherein the amplitude of the applied voltage is less than the critical voltage amplitude of the helix unwinding. The liquid crystal has one steady state corresponding to twisted helix without applied voltage.Type: ApplicationFiled: May 18, 2011Publication date: November 24, 2011Applicant: The Hong Kong University of Science and TechnologyInventors: Vladimir Grigorievich Chigrinov, Evgeny Pavlovich Pozhidaev, Anatoli Alexandrovich Murauski, Hoi Sing Kwok
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Patent number: 8055788Abstract: An efficient person search method utilizing human communications characteristics such as close social network, user-dependent hot list, and high skewness in access popularity. This method makes use of hot lists in the routing process and clusters people of the same community together in the search graph, thereof creating a “small-world” effect to minimize the hop counts routing would have to go through in a Peer-to-Peer environment.Type: GrantFiled: November 21, 2006Date of Patent: November 8, 2011Assignee: Hong Kong University of Science and TechnologyInventors: Gary Shueng Han Chan, Vanessa Meng I Lei, Patrick Chun Sing Fan, Marvin Yuk Kit Kwok, Reeve Kit Wah Lau, Ivan Ka Wai Lee
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Patent number: 8044432Abstract: Methods and devices for fabricating AlGaN/GaN normally-off high electron mobility transistors (HEMTs). A fluorine-based (electronegative ions-based) plasma treatment or low-energy ion implantation is used to modify the drain-side surface field distribution without the use of a field plate electrode. The off-state breakdown voltage can be improved and current collapse can be completely suppressed in LDD-HEMTs with no significant degradation in gains and cutoff frequencies.Type: GrantFiled: November 29, 2006Date of Patent: October 25, 2011Assignee: The Hong Kong University of Science and TechnologyInventors: Jing Chen, Kei May Lau
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Publication number: 20110254847Abstract: Systems, methods, and apparatus for sampling images using minimum mean square error subpixel-based down-sampling are presented herein. A partition component can be configured to divide a first array of pixels into two-dimensional (2-D) blocks of pixels. A sampling component can be configured to receive a query from a device including information associated with a display of the device; diagonally down-sample subpixels of a block of the 2-D blocks and generate a second array of pixels based on the down-sampled subpixels and the query. The sampling component can communicate at least a portion of the second array to the device based on the query. The information associated with the display can include a dimension associated with the display. Further, sampling component can be associated with a web browser; and the query can include an internet based query.Type: ApplicationFiled: June 9, 2011Publication date: October 20, 2011Applicant: THE HONG KONG UNIVERSITY OF SCIENCE AND TECHNOLOGYInventors: Oscar Chi Lim Au, Lu Fang
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Patent number: 8038728Abstract: A method is described for treating fabrics, yarns and individual fibers to improve the mechanical properties thereof, for example their wrinkle-resistance, by treating the fabric, yarn, and fibers in a solution containing polymer nanoparticles. The nanoparticles include two sizes of particles and an appropriate selection of the nanoparticles to control the degree and mode of cross-linking in the fabric with corresponding control of the mechanical properties. The nanoparticles can be provided with an electrical charge that can be opposite in sign to any charge carried by the fabric in order to enhance the formation of a polymer film on the fabric.Type: GrantFiled: February 8, 2008Date of Patent: October 18, 2011Assignee: The Hong Kong University of Science and TechnologyInventors: Bing Xu, Ping Gao, Cheng Yang
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Patent number: RE42853Abstract: It is known to represent a square block of an image which has a maximum horizontal or vertical extension N as N vectors each representing one column or row, and encode it using an N×N discrete cosine transform matrix. We introduce a technique which transforms an input vector, or array, representing a portion of an arbitrarily-shaped object block in which the maximum horizontal or vertical extension is at most N, by adding to it additional padding elements, to produce a vector or array which can be encoded using an N×N discrete cosine transform. The padding maximises the number of transformed elements which are zero. We propose encoding arbitrarily-shaped objects based on this padding technique.Type: GrantFiled: November 20, 2006Date of Patent: October 18, 2011Assignee: The Hong Kong University of Science and TechnologyInventors: Guobin Shen, Bing Zeng, Ming Liou