Abstract: A voice processing method includes: determining a historical voice frame corresponding to a target voice frame; determining a frequency-domain characteristic of the historical voice frame; invoking a network model to predict the frequency-domain characteristic of the historical voice frame, to obtain a parameter set of the target voice frame, the parameter set including a plurality of types of parameters, the network model including a plurality of neural networks (NNs), and a number of the types of the parameters in the parameter set being determined according to a number of the NNs; and reconstructing the target voice frame according to the parameter set.

Abstract: Disclosed are a data processing method and apparatus for a blockchain, and a medium. The data processing method for the blockchain is applied to a blockchain node. The method includes: obtaining a transaction request for creating a synchronizing group; based on the transaction request for creating the synchronizing group, determining one or more sequential blocks from a first block to a current block as one or more synchronizing blocks of the synchronizing group; determining a synchronizing signature of the synchronizing group based on the one or more synchronizing blocks; and recording the synchronizing signature as transaction data in the current block.

Abstract: Embodiments of the disclosure provide a speech signal encoding and decoding methods and apparatuses, an electronic device, and a computer-readable storage medium. The decoding method includes: obtaining a bitstream including a first substream, and the first substream being a bitstream obtained by encoding a low-frequency subband signal of an original speech signal by using a first encoding method; and performing signal reconstruction based on the first substream in a case that the bitstream includes no second substream, to obtain a reconstructed speech signal; or performing signal reconstruction based on the first substream and at least one second substream in a case that the bitstream includes the at least one second substream, to obtain a reconstructed speech signal, each second sub stream being obtained by encoding a high-frequency subband signal of the original speech signal, and the encoding being performed by using a second encoding method corresponding to the each second substream.

Abstract: Embodiments of this disclosure provide a speech signal processing method and apparatus, an electronic device, and a non-transitory computer-readable storage medium. A processing circuitry of the electronic device obtains speech feature parameters of a to-be-processed speech signal. The speech feature parameters include an initial spectrum of the to-be-processed speech signal. The processing circuitry predicts a first quantity of subband spectrum envelopes based on the speech feature parameters. The first set quantity is less than a quantity of initial spectrum coefficients included in the initial spectrum. Each of the subband spectrum envelopes corresponds to a second quantity of initial spectrum coefficients. The processing circuitry adjusts the initial spectrum based on the predicted subband spectrum envelopes to obtain an adjusted spectrum. The processing circuitry obtains an enhanced speech signal corresponding to the to-be-processed speech signal based on the adjusted spectrum.

Abstract: A distributed data storage system may implement determining indexing progress for a table stored in the distributed data storage system. A table may be stored in multiple table partitions. When a secondary index is created for the table, each partition may independently index the items stored within the table partition in order to identify those items in the partition that should be stored in the secondary index. During creation of the secondary index, creation progress points that indicate the progress of the indexing across the table partitions may be determined. The creation progress points may be provided via a programmatic, textual, or graphical interface to the distributed data storage system.

Abstract: A system that implements a data storage service may store data for database tables in multiple replicated partitions on respective storage nodes. In response to a request to back up a table, the service may export individual partitions of the table from the database and package them to be independently uploaded (e.g., in parallel) to a remote storage system (e.g., a key-value durable storage system). Prior to uploading the exported and packaged partitions to the remote storage system, the service may verify that the exported and packaged partitions can be subsequently restored, which may include unpackaging and/or re-inflating the exported and packaged partitions to create additional unpackaged copies of the partitions, re-importing the additional unpackaged copies of the partitions into the database (e.g., as additional replicas), and/or comparing checksums generated for the exported partitions with checksums generated for the additional unpackaged copies of the partitions.

Abstract: One or more table partitions may communicate with an index partition that may be a master of a replication group. A communications channel may exist between table partitions and the index partition. Upon splitting the index partition, communications between the table partitions and the index partition may be suspended. Upon completion of the split, communications may be reestablished between the table partitions and a partition, of the replication group of index partitions, designated to be a master following the split. Messages accumulated by the table partitions during the split may be sent to the index partition upon reestablishing communications.

Abstract: Various embodiment provide a multi-terminal cooperative working method, a terminal device, and a multi-terminal cooperative system. In those embodiments, a primary device can send networking information to a plurality of secondary devices, and the primary device has a permission to manage the cooperative network. The primary device can receive networking confirmation information sent by the plurality of secondary devices; and send configuration information to the plurality of secondary devices separately. The configuration information can be used to instruct to switch, based on a preset management permission switching mechanism when the primary device becomes abnormal or the primary device exits from the cooperative network, the permission to manage the cooperative network. The primary device can clear the secondary device from the cooperative network the secondary device becomes abnormal. In this way, robustness of the cooperative network can be improved.

Abstract: Methods for vehicle operation using behavioral rule checks include receiving first sensor data from first sensors and second sensor data from second sensors of the vehicle. The first sensor data represents operation of the vehicle in accordance with a first trajectory. The second sensor data represents at least one object. It is determined that the first trajectory violates a first behavioral rule of operation based on the first sensor data and the second sensor data. The first behavioral rule has a first priority. Multiple alternative trajectories are generated using control barrier functions. A second trajectory is identified that violates a second behavioral rule having a second priority less than the first priority. Responsive to identifying the second trajectory, a message is transmitted to a control circuit of the vehicle to operate the vehicle based on the second trajectory.

Abstract: Scalable architecture for propagating updates may be implemented for data replicated from a data set. A node may receive updates to items in a data set that have been committed to the data set. The node may determine whether the update should be applied to a replicated portion of the data set. For updates that should be applied, the node may identify another node that hosts the replicated portion of the data set and send a request to the other node to perform a conditional atomic operation to apply the update to the item in the replicated portion of the data set. The condition may compare a version identifier associated with an update and a current version identifier for the item at the other node. If the condition evaluates true, then the update to the item in the replicated portion may be performed.

Abstract: A Fresnel projection screen includes: a Fresnel layer; a first micro-structure layer disposed at a light incident side of the Fresnel layer, the first micro-structure layer including a plurality of micro-structures that are configured to diffusely reflect a portion of light incident thereon and refract another portion of the light; a second micro-structure layer disposed on a surface of the first micro-structure layer, the second micro-structure layer including a plurality of second micro-structures that are configured to diffusely reflect a portion of light incident thereon and refract another portion of the light; and a reflective layer disposed on a side of the Fresnel layer away from the first micro-structure layer.

Abstract: A method for producing a structured glass disk is provided that includes the steps of: providing a glass disk having a thickness of at most 400 ?m; directing and focusing a laser beam onto the glass disk such that the laser beam produces an elongated focus within the glass disk with an intensity sufficient to produce damage within the glass disk along the elongated focus; moving the laser beam and the glass disk relative to one another to insert damage zones along a ring-shaped path so that a workpiece is defined in the glass disk with the ring-shaped path encompassing the workpiece and with the workpiece remaining connected to the glass disc; exposing the glass disk to an etchant so that the etchant intrudes into the damage zones; and chemically toughening the glass disk with the workpiece.

Abstract: A bandwidth extension (BWE) method includes: determining parameters of a low-frequency spectrum of a narrowband signal; inputting the parameters of the low-frequency spectrum into a neural network model, and obtaining a correlation parameter based on an output of the neural network model; obtaining a target high-frequency amplitude spectrum based on the correlation parameter and a low-frequency amplitude spectrum; obtaining a high-frequency spectrum based on a low-frequency phase spectrum and the target high-frequency amplitude spectrum of the narrowband signal; and obtaining a broadband signal after BWE based on the low-frequency spectrum and the high-frequency spectrum.

Abstract: The present disclosure relates to bendable elements. The bendable elements can be used in display covers for electronic devices such as smart phones. The elements have reduced delayed elastic deformation or creep when released from the influence of persistent mechanical stresses, e.g. unfolded from a folded position. The present disclosure also relates to covers for color filters, filter printed electronics, sensors for touch control panels, fingerprint sensors, mobile electronic devices, bendable/foldable displays that include the bendable elements as substrates, or other applications where a combination of high chemical stability, temperature stability, low gas permeability, flexibility, high strength, low thickness and premium cosmetic appearance is necessary. Besides consumer and industrial electronics the present disclosure could also be used for protection applications in industrial production or metrology.

Abstract: Disclosed in the present invention are an emodin succinyl ester compound, a preparation method therefor and a use thereof, the emodin succinyl ester compound having the structure as represented by formula I (R being a C1-5 alkyl group). The method provided in the present invention has a simple method course, and may effectively save time in synthesis and reduce costs, being simple to operate, being easy to implement, and being suitable for industrial production. Experiments show that the emodin succinyl ester compound of the present invention may better promote the healing of diabetic wounds than emodin, and may be used for preparing a drug for promoting the healing of diabetic wounds.

Abstract: This application provides a method for secure multi-terminal cooperative working, applied to a network on which a plurality of terminal devices perform cooperative playing and/or cooperative recording, where the plurality of terminal devices include a first terminal device. The method includes: determining, by the first terminal device, a security mechanism; obtaining, by the first terminal device, cooperative working information, where the cooperative working information is information played and/or recorded by the plurality of terminal devices; and performing, by the first terminal device, security processing on the cooperative working information based on the security mechanism.

Abstract: A Fresnel projection screen includes: a Fresnel layer; a first micro-structure layer disposed at a light incident side of the Fresnel layer, the first micro-structure layer including a plurality of micro-structures that are configured to diffusely reflect a portion of light incident thereon and refract another portion of the light; and a reflective layer disposed on a side of the Fresnel layer away from the first micro-structure layer.

Abstract: A method, an apparatus, a device, and a storage medium for displaying an equipment in a virtual environment battle. The method includes displaying a first battle interface of the virtual environment battle including a main equipment slot, an auxiliary equipment slot, and an expansion control interface in a first partial region of the first battle interface, the main equipment slot for displaying a main equipment of the virtual character, and the auxiliary equipment slot for displaying a first auxiliary equipment of the virtual character; receiving a first trigger signal on the expansion control interface, and displaying a second battle interface of the virtual environment battle including the main equipment slot, the auxiliary equipment slot, and an expansion equipment slot in a second partial region of the second battle interface, the expansion equipment slot for displaying a second auxiliary equipment owned by the virtual character other than the first auxiliary equipment.

Abstract: A method for controlling a DC-DC conversion system having power conversion modules, input sensors, an output sensor and a controller, in which each of the power conversion modules has one or more conversion units. The output sensor detects an output signal of the DC-DC conversion system. The input sensors detect input voltage signals located at series-connected first sides of one or more conversion units respectively. The controller receives the output signal and the input voltage signals. The controller generates a first control signal according to the output signal and an output reference signal. The controller generates second control signals according to the input voltage signals and input reference voltage signals. The controller outputs a modulation signal corresponding to a corresponding one of the second control signals according to the first control signal and the corresponding second control signal, to control switches of a corresponding conversion unit.

Abstract: An element of an inorganic brittle material having two opposed sides and a circumferential edge includes at least three sections. The at least three sections include a first section and two second sections, the second sections adjoining the first section so that the first section is arranged between the second sections. The first section includes an arrangement of openings forming passages from one side to an opposed side of the element so that the first section has a higher flexibility than the second sections.