Abstract: A device operates to perform acoustic echo cancellation. The device includes a speaker to output a far-end signal at the device, a microphone to receive at least a near-end signal and the far-end signal from the speaker to produce a microphone output, and an AI accelerator operative to perform neural network operations according to a first neural network model and a second neural network model to output an echo-suppressed signal. The device further includes a digital signal processing (DSP) unit. The DSP unit is operative to perform adaptive filtering to remove at least a portion of the far-end signal from the microphone output to generate a filtered near-end signal, and perform Fast Fourier Transform (FFT) and inverse FFT (IFFT) to generate input to the first neural network model and the second neural network model, respectively.

Abstract: This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for switching a secondary cell to a primary cell. A user equipment (UE) monitors a first radio condition of the UE for beams of a primary cell and a second radio condition for beams of one or more secondary cells configured for the UE in carrier aggregation. The UE transmits a request to configure a candidate beam of at least one candidate secondary cell as a new primary cell in response to the first radio condition not satisfying a first threshold and the second radio condition for the at least one candidate secondary cell satisfying a second threshold. A base station determines to reconfigure at least one secondary cell as the new primary cell. The base station and the UE perform a handover of the UE to the new primary cell.

Abstract: In a file sharing system, a key manager unit realizes a correspondence between the first user identifier and the first public key in response to a registration request of the first user, generates a first key material for encrypting the first file into a first encrypted file, and generates a first credential according to the first user identifier, the first file identifier, the first public key and the first key material after receiving an access-right claim request to the first file from the first user. A file storage unit stores the first encrypted file and the first credential. The first user uses the first user identifier, the first file identifier and the first private key to retrieve the first key material out of the first credential, and uses the first key material to decrypt the first encrypted file into the first file.

Abstract: A method for predicting clinical severity of a neurological disorder includes steps of: a) identifying, according to a magnetic resonance imaging (MRI) image of a brain, brain image regions each of which contains a respective portion of diffusion index values of a diffusion index, which results from image processing performed on the MRI image; b) for one of the brain image regions, calculating a characteristic parameter based on the respective portion of the diffusion index values; and c) calculating a severity score that represents the clinical severity of the neurological disorder of the brain based on the characteristic parameter of the one of the brain image regions via a prediction model associated with the neurological disorder.

Abstract: A first user device has first public and private keys and a file encryption key for encrypting the specified file into an encrypted file. A second user device has second public and private keys. A server is in communication with the first and second user devices. The first user device generates temporary public and private keys, performs a first key establishment with the second public key, first private key and temporary private key to generate a shared secret, and uses the shared secret to encrypt the file encryption key into an encrypted key.

Abstract: A digital key service device includes a casing, an input device, a data storage unit and a controlling unit. The input device is disposed near the casing or mounted on the casing, and configured to receive a user operation input. The data storage unit is disposed in the casing, and configured to store digital data and a digital key. The controlling unit is disposed in the casing, and configured to use the digital key to perform a digital key service or output the digital data to a host when authentication is complete. The authentication includes an operation verification procedure for verifying the user operation input. The authentication is complete when the controlling unit determines that the user operation input conforms to a preset timing-based input set.

Abstract: A link table recovery method for a flash memory having a plurality of blocks is provided. The method includes: selecting one block from the blocks; selecting a last page containing data of the selected block; checking the last page to determine whether the last page has errors; moving the correct data in the selected block to one of the spare blocks when the last page of the selected block detects errors; and updating a link table of the flash memory.

Abstract: A workpiece supporting device of a circular sawing machine includes a base frame for rotatably supporting a worktable and having an arcuate surface region which defines an angularly extending guiding route. A platform is disposed on and is movable along the guiding route, and has an upper mounting surface that cooperates with the worktable to support a workpiece. A tightening mechanism is displaceable between unmovable and movable positions, where the platform is brought into tight and loose engagements with the arcuate surface region. An actuator is coupled with the tightening mechanism is operable to displace the tightening mechanism. The platform is movable along the guiding route when the tightening mechanism is in the movable position such that the worktable is turnable within a relatively large angular range.

Abstract: A link table recovery method for a flash memory having a plurality of blocks is provided. The method includes: selecting one block from the blocks; selecting a last page containing data of the selected block; checking the last page to determine whether the last page has errors; moving the correct data in the selected block to one of the spare blocks when the last page of the selected block detects errors; and updating a link table of the flash memory.

Abstract: A digital content application system comprises a first user means, a second user means and a digital content application platform. The first user means comprises a storage unit and an information management unit. The storage unit stores personal secure information and an electronic file. The electronic file comprises an encrypted digital content and an encrypted symmetric key. The information management unit decrypts the encrypted symmetric key by using the personal secure information so as to generate a symmetric key, and decrypts the encrypted digital content by using the symmetric key for generating a digital content. In conjunction with the decryption of the digital content, the information management unit determines the integrity of the digital content based on two hash values. The digital content application platform receives the digital content from the second user means and transmitting the electronic file to the first user means.