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1.发明公开公开(公告)号：US20240314006A1
公开(公告)日：2024-09-19
申请号：US18491558
申请日：2023-10-20
Applicant: California Institute of Technology , The Regents of the University of California , Technische Universität Berlin
Inventor： Philipp Walk , Babak Hassibi , Peter Jung , Hamid Jafarkhani
IPC: H04L27/26 , H04B1/04 , H04B7/0452 , H04L7/04 , H04L27/12
CPC classification number: H04L27/2602 , H04B1/0475 , H04B7/0452 , H04L7/042 , H04L7/048 , H04L27/122
Abstract: Communication systems and methods in accordance with various embodiments of the invention utilize modulation on zeros. Carrier frequency offsets (CFO) can result in an unknown rotation of all zeros of a received signal's z-transform. Therefore, a binary MOCZ scheme (BMOCZ) can be utilized in which the modulated binary data is encoded using a cycling register code (e.g. CPC or ACPC), enabling receivers to determine cyclic shifts in the BMOCZ symbol resulting from a CFO. Receivers in accordance with several embodiments of the invention include decoders capable of decoding information bits from received discrete-time baseband signals by: estimating a timing offset for the received signal; determining a plurality of zeros of a z-transform of the received symbol; identifying zeros from the plurality of zeros that encode received bits by correcting fractional rotations resulting from the CFO; and decoding information bits based upon the received bits using a cycling register code.
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2.发明授权公开(公告)号：US11990224B2
公开(公告)日：2024-05-21
申请号：US17214442
申请日：2021-03-26
Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
Inventor： Hamid Jafarkhani , Saeed Karimi-Bidhendi , Arash Kheradvar
CPC classification number: G16H30/40 , G06F18/2148 , G06F18/2185 , G06F18/2193 , G06N3/08 , G06N7/01 , G06T7/0012 , G06T7/143 , G06V10/82 , G06T2207/10088 , G06T2207/20084 , G06T2207/30048 , G06V2201/031
Abstract: Methods, devices, and systems that are related to facilitating an automated, fast and accurate model for cardiac image segmentation, particularly for image data of children with complex congenital heart disease are disclosed. In one example aspect, a generative adversarial network is disclosed. The generative adversarial network includes a generator configured to generate synthetic imaging samples associated with a cardiovascular system, and a discriminator configured to receive the synthetic imaging samples from the generator and determine probabilities indicating likelihood of the synthetic imaging samples corresponding to real cardiovascular imaging sample. The discriminator is further configured to provide the probabilities determined by the discriminator to the generator and the discriminator to allow the parameters of the generator and the parameters of the discriminator to be adjusted iteratively until an equilibrium between the generator and the discriminator is established.
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3.发明申请公开(公告)号：US20200259534A1
公开(公告)日：2020-08-13
申请号：US16785279
申请日：2020-02-07
Applicant: California Institute of Technology , The Regents of the University of California , Technische Universität Berlin
Inventor： Philipp Walk , Babak Hassibi , Peter Jung , Hamid Jafarkhani
IPC: H04B7/0452 , H04L7/04 , H04L27/12 , H04B1/04
Abstract: Communication systems and methods in accordance with various embodiments of the invention utilize modulation on zeros. Carrier frequency offsets (CFO) can result in an unknown rotation of all zeros of a received signal's z-transform. Therefore, a binary MOCZ scheme (BMOCZ) can be utilized in which the modulated binary data is encoded using a cycling register code (e.g. CPC or ACPC), enabling receivers to determine cyclic shifts in the BMOCZ symbol resulting from a CFO. Receivers in accordance with several embodiments of the invention include decoders capable of decoding information bits from received discrete-time baseband signals by: estimating a timing offset for the received signal; determining a plurality of zeros of a z-transform of the received symbol; identifying zeros from the plurality of zeros that encode received bits by correcting fractional rotations resulting from the CFO; and decoding information bits based upon the received bits using a cycling register code.
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公开(公告)号：US09875581B2
公开(公告)日：2018-01-23
申请号：US14929806
申请日：2015-11-02
Applicant: The Regents of the University of California
Inventor： Hamid Jafarkhani , Mahdi Hajiaghayi , Elliott Groves , Arash Kheradvar
IPC: G06K9/00 , G06K9/40 , G06T19/20 , A61B5/055 , A61B5/00 , A61B8/08 , A61B8/00 , G06T7/12 , G06T7/149
CPC classification number: G06T19/20 , A61B5/0044 , A61B5/055 , A61B8/0883 , A61B8/466 , A61B8/483 , A61B8/5223 , A61B2576/02 , G06T7/12 , G06T7/149 , G06T2207/10088 , G06T2207/10132 , G06T2207/20116 , G06T2207/30048 , G06T2219/2021
Abstract: The disclosure relates to a method of automatically producing a three-dimensional (3D) segmentation of a heart chamber, the method comprising: obtaining data sets from cardiac magnetic resonance imaging (MRI) or ultrasound, generating a 3D segmentation of the heart chamber from the data sets using an active contour method, modifying the 3D segmentation by adding a plurality of intra-chamber structures; and identifying an enclosing myocardium using the 3D segmentation generated by the method.
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5.发明申请公开(公告)号：US20210312242A1
公开(公告)日：2021-10-07
申请号：US17214442
申请日：2021-03-26
Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
Inventor： Hamid Jafarkhani , Saeed Karimi-Bidhendi , Arash Kheradvar
Abstract: Methods, devices, and systems that are related to facilitating an automated, fast and accurate model for cardiac image segmentation, particularly for image data of children with complex congenital heart disease are disclosed. In one example aspect, a generative adversarial network is disclosed. The generative adversarial network includes a generator configured to generate synthetic imaging samples associated with a cardiovascular system, and a discriminator configured to receive the synthetic imaging samples from the generator and determine probabilities indicating likelihood of the synthetic imaging samples corresponding to real cardiovascular imaging sample. The discriminator is further configured to provide the probabilities determined by the discriminator to the generator and the discriminator to allow the parameters of the generator and the parameters of the discriminator to be adjusted iteratively until an equilibrium between the generator and the discriminator is established.
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Patent Agency Ranking
公开(公告)号：US10992353B2
公开(公告)日：2021-04-27
申请号：US17013525
申请日：2020-09-04
Applicant: California Institute of Technology , The Regents of the University of California , Technische Universität Berlin
Inventor： Philipp Walk , Babak Hassibi , Peter Jung , Hamid Jafarkhani
IPC: H04B7/0452 , H04L7/04 , H04L27/12 , H04B1/04
Abstract: Communication systems and methods in accordance with various embodiments of the invention utilize modulation on zeros. Carrier frequency offsets (CFO) can result in an unknown rotation of all zeros of a received signal's z-transform. Therefore, a binary MOCZ scheme (BMOCZ) can be utilized in which the modulated binary data is encoded using a cycling register code (e.g. CPC or ACPC), enabling receivers to determine cyclic shifts in the BMOCZ symbol resulting from a CFO. Receivers in accordance with several embodiments of the invention include decoders capable of decoding information bits from received discrete-time baseband signals by: estimating a timing offset for the received signal; determining a plurality of zeros of a z-transform of the received symbol; identifying zeros from the plurality of zeros that encode received bits by correcting fractional rotations resulting from the CFO; and decoding information bits based upon the received bits using a cycling register code.
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7.发明授权公开(公告)号：US10521902B2
公开(公告)日：2019-12-31
申请号：US15294207
申请日：2016-10-14
Applicant: The Regents of the University of California
Inventor： Michael Rashidi Avendi , Hamid Jafarkhani , Arash Kheradvar
Abstract: Systems and methods are disclosed for automatically segmenting a heart chamber from medical images of a patient. The system may include one or more hardware processors configured to: obtain image data including at least a representation of the patient's heart; obtain a region of interest from the image data; organize the region of interest into an input vector; apply the input vector through a trained graph; obtain an output vector representing a refined region of interest corresponding to the heart based on the application of the input vector through the trained graph; apply a deformable model on the obtained output vector representing the refined region of interest; and identify a segment of a heart chamber from the application of the deformable model on the obtained output vector.
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公开(公告)号：US20230092437A1
公开(公告)日：2023-03-23
申请号：US17662213
申请日：2022-05-05
Applicant: California Institute of Technology , The Regents of the University of California , Technische Universität Berlin
Inventor： Philipp Walk , Babak Hassibi , Peter Jung , Hamid Jafarkhani
IPC: H04L27/26 , H04B7/0452 , H04L7/04 , H04B1/04 , H04L27/12
Abstract: Communication systems and methods in accordance with various embodiments of the invention utilize modulation on zeros. Carrier frequency offsets (CFO) can result in an unknown rotation of all zeros of a received signal's z-transform. Therefore, a binary MOCZ scheme (BMOCZ) can be utilized in which the modulated binary data is encoded using a cycling register code (e.g. CPC or ACPC), enabling receivers to determine cyclic shifts in the BMOCZ symbol resulting from a CFO. Receivers in accordance with several embodiments of the invention include decoders capable of decoding information bits from received discrete-time baseband signals by: estimating a timing offset for the received signal; determining a plurality of zeros of a z-transform of the received symbol; identifying zeros from. the plurality of zeros that encode received bits by correcting fractional rotations resulting from the CFO; and decoding information bits based upon the received bits using a cycling register code.
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9.发明申请公开(公告)号：US20230037969A1
公开(公告)日：2023-02-09
申请号：US17865950
申请日：2022-07-15
Applicant: The Regents of the University of California
Inventor： Zhiying WANG , Weiqi LI , Hamid Jafarkhani
Abstract: Processes and device configurations are provided for generating and using flexible storage codes. Methods and configurations described herein can reconstruct and recover data from a distributed network in the event of one or more failures or erasures. According to embodiments, a method includes determining the number of nodes and number of symbols of a flexible storage code, and reconstructing the information using the flexible storage code and determined numbers of nodes and symbols. The flexible storage code may be configured for a flexible number of nodes and symbols for information to use a subarray of symbols and nodes of a storage code array for information. Flexible storage codes may provide a framework for a reconstruction configuration using one or more of a flexible locally recoverable code (LRC), flexible partial maximum distance separable code (PMDSC), and flexible minimum storage regenerating code (MSRC).
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公开(公告)号：US11228323B2
公开(公告)日：2022-01-18
申请号：US16887804
申请日：2020-05-29
Applicant: The Regents of the University of California
Inventor： Zhiying Wang , Weiqi Li , Hamid Jafarkhani
Abstract: Methods and devices are provided for error correction of distributed data in distributed systems using Reed-Solomon codes. In one embodiment, processes are provided for error correction that include receiving a first correction code for data fragments stored in storage nodes, constructing a second correction code responsive to an unavailable storage node of the storage nodes, performing erasure repair of the unavailable storage node, and outputting a corrected data fragment. The first correction code is a Reed-Solomon code represented as a polynomial and the second correction code is represented as a second polynomial with an increased subpacketization size. Processes are configured to account for repair bandwidth and sub-packetization size. Code constructions and repair schemes accommodate different sizes of evaluation points and provide a flexible tradeoff between the subpacketization size repair bandwidth of codes. In addition, schemes are provided to manage a single node failure and multiple node failures.
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