-
公开(公告)号：US20230134538A1
公开(公告)日：2023-05-04
申请号：US17513148
申请日：2021-10-28
发明人： Sui Pung Cheung , Qing Chun Li , Tin Ho Li
摘要： The invention provides a power converter apparatus for converting an alternating current (AC) power input to a direct current (DC) power output. The apparatus comprises a plurality of n single-phase power converting circuits arranged in parallel, where n is equal to or greater than 2, wherein one of said n single-phase power converting circuits comprises a single-stage AC/DC converter module having an operating AC/DC converter; and each of a remaining n−1 of said single-phase power converting circuits comprises a two-stage converter module having an AC/DC converter as an input stage and a DC/DC transformer as an output stage.
-
公开(公告)号：US11625860B1
公开(公告)日：2023-04-11
申请号：US17467664
申请日：2021-09-07
发明人： Ho Man Cheng , Yao Cheng Liang , Ka Ho Mui
摘要： Described is a method of calibrating a camera. The method comprises obtaining geographical coordinates of a selected physical point location within an image view of the camera and measuring an angle between an x-axis of a real-world coordinate system passing through said selected point location with respect to true north. The method includes using said obtained geographical coordinates, said measured angle, and projection data derived from characteristics of the camera to derive modified projection data for transforming a two-dimensional pixel coordinate system of the camera image view into a three-dimensional geographical coordinate system for point locations within the image view of the camera.
-
公开(公告)号：US20230083307A1
公开(公告)日：2023-03-16
申请号：US17467683
申请日：2021-09-07
发明人： Yao Cheng Liang , Ho Man Cheng , Ka Ho Mui
摘要： Described is a method of calibrating a camera. The method comprises defining an area observed in a field of view (FOV) of the camera as a region of interest (ROI). The method includes selecting a plurality of physical reference points in said ROI and obtaining for each reference point physical position coordinates. The method also includes obtaining from said camera FOV or camera image data pixel locations for each point of reference and pairing each pixel location with the physical position coordinates of its respective reference point. Then, a relationship is derived from the paired pixel locations and physical position coordinates to enable a selected or identified pixel location in the camera FOV or camera image data to be transformed to physical position coordinates for a corresponding physical location in said ROI.
-
4.发明授权公开(公告)号：US11435584B2
公开(公告)日：2022-09-06
申请号：US16352127
申请日：2019-03-13
发明人： Dehua Liu , Chun Yip Wong , Kin Lung Chan
摘要： Systems and methods providing optical structures providing a large field of view (FOV) for personal portable displays are described. An optical structure of embodiments comprises a catadioptric optical configuration configured to produce a magnified curved intermediate image, wherein the magnified curved intermediate image is furthered magnified with proper reflection angle and transmitted to viewer's eye. The catadioptric optical configuration may comprise two curved mirrors and a polarization prism. Optical structures comprising such catadioptric optical configurations may utilize relatively small sized image sources to produce a large FOV. Such optical structures are well suited for use in large FOV optical see through (OST) head-mounted displays (HMDs).
-
公开(公告)号：US20220256642A1
公开(公告)日：2022-08-11
申请号：US17171190
申请日：2021-02-09
发明人： Yaming Luo , Yunxiang Yao , Man Wai Kwan , Xiangyu Liu , Yiu Wing Edwin Chan , Kong Chau Tsang
摘要： Described is a method and device for detecting a discontinuous transmission state (DTX) at an uplink control information (UCI) receiver device in a wireless communication system. The method involves receiving a linear block encoded signal on an uplink (UL) at said UCI receiver device and processing the received linear block encoded signal after resource element (RE) dernapping to obtain channel estimation data. The method includes determining from said channel estimation data a DTX metric for one or more selected resource blocks (RBs) and determining if a DTX state has occurred by comparing the determined DTX metric to a calculated, selected, or predetermined threshold.
-
公开(公告)号：US11323986B2
公开(公告)日：2022-05-03
申请号：US16815144
申请日：2020-03-11
发明人： Eddy Chiu , Yun Hou , Yuyi Mao , Xiangyu Liu , Ching Hong Chris Leung , Man Wai Victor Kwan , Kong Chau Eric Tsang
摘要： Described is a method of decoding a physical sidelink control channel (PSCCH). The method comprises: for a PSCCH candidate in a resource grid, processing a received demodulation reference signal (DMRS) in a subframe of the resource grid associated with the PSCCH candidate to determine one or more potential PSCCHs for decoding, each of the one or more potential PSCCHs being identified by resource block (RB) position in the resource grid and a corresponding DMRS cyclic shift (ncs) value. This step is repeated for at least one other DMRS in the subframe to determine one or more potential PSCCHs for the at least one other DMRS. Then, a subset L of PSCCHs is selected from the potential PSCCHs. The selected subset L of PSCCHs together with their corresponding DMRS cyclic shift (ncs) values are made available for use in a decoding process for the received channel signal.
-
7.发明授权公开(公告)号：US11206167B1
公开(公告)日：2021-12-21
申请号：US16894955
申请日：2020-06-08
发明人： Haiming Zhang , Eddy Chiu , Man-Wai Kwan , Ho Yin Chan , Chunhua Sun , Kong Chau Tsang
摘要： A method of performing carrier frequency offset (CFO) estimation and/or time offset (TO) estimation at a radio equipment in a mobile communications system. The method allows, for each of a plurality of synchronization signal (SS) blocks (SSBs) in a SS Burst detected at said radio equipment, determining a CFO estimation and/or a TO estimation based on network information signal prediction. The method includes selecting at least some of said detected SSBs in said SSB Burst and combining the CFO estimations and/or the TO estimations to obtain improved CFO compensation and/or TO compensation for signal processing at said radio equipment.
-
公开(公告)号：US20210366279A1
公开(公告)日：2021-11-25
申请号：US16882589
申请日：2020-05-25
发明人： Dongzhe Su , Hang Chen , Siu Ping Chan , Ka Ho Mui
IPC分类号： G08G1/0967 , H04W4/44 , H04L29/08 , G08G1/01
摘要： A method for improving road safety of a vehicle in a system having a plurality of communicatively connected roadside units (RSUs) placed within a defined geographical area, each RSU configured to receive data from a plurality of sources located within its respective coverage area forming part of said defined geographical area and to at least transmit the received data and/or data derived from the received data to one or more data processing units located within its coverage area. The method has the steps of: receiving data defining an event E1 occurring within the coverage area of an event RSU; determining a type of the event E1; and based on the type of event E1, communicating data defining the event E1 or data related to the event E1 from the event RSU to one or more selected RSUs from remaining RSUs.
-
9.发明申请公开(公告)号：US20210307000A1
公开(公告)日：2021-09-30
申请号：US16827883
申请日：2020-03-24
发明人： Yaming Luo , Man Wai Kwan , Xiangyu Liu , Kanghao Jia , Kong Chau Tsang
摘要： Described is a method and device for processing a signal received at an uplink control information (UCI) receiver in a wireless communication system. The method comprises processing a signal received on an uplink (UL) at said UCI receiver to transform said received signal into a likelihood calculation of possible transmitted codewords (θ1 . . . θi . . . θN). The likelihood calculation of possible transmitted codewords (θ1 . . . θi . . . θN) may comprise a multi-dimensional discrete Fourier transform (DFT) (θ1 . . . θi . . . θN) of said received signal. The multi-dimensional may be formed as a Hadamard Transform. The method includes determining a maximum magnitude θmax value from said likelihood calculation of possible transmitted codewords (θ1 . . . θi . . . θN) and then comparing said θmax value to a selected, calculated or predetermined scaled threshold c.τ where τ is a threshold and c is a scaling factor for the threshold τ. The comparison is such that, where θmax>c.τ, it is determined that the signal received on the UL at said UCI receiver comprises a linear block encoded signal. In some cases, the scaling factor c may be omitted.
-
公开(公告)号：US20210287132A1
公开(公告)日：2021-09-16
申请号：US16818702
申请日：2020-03-13
发明人： Chi Kong WU , Ka Wing HO
IPC分类号： G06N20/00 , G06F16/23 , G06N3/00 , H04L12/58 , G06F40/205
摘要： The present disclosure describes methods, devices, and non-transitory computer readable storage medium for managing lifecycle of a knowledge base (KB) in chatbot systems. The method includes receiving an update request and updating a current-version KB as a new current-version KB. The method also includes receiving a first test request from a knowledge point (KP) operator and determining whether the new current-version KB passes a first test; and in response to the determination that the new current-version KB passes the first test, submitting the new current-version KB as a new submit-version KB. The method further includes receiving a second test request from a KP manager and determining whether the new submit-version KB passes a second test; and in response to the determination that the new submit-version KB passes the second test, storing an original production-version KB as a pervious-version KB and submitting the new submit-version KB as a new production-version KB.
-
-
-
-
-
-
-
-
-
搜索结果
442 条记录 (耗时 0.048 秒)