Abstract: Embodiments of the present application provide a method, an apparatus, a computer device for convolution operation and a computer readable storage medium. The method includes: obtaining input data of a network layer in a convolutional neural work; extracting each time a plurality of data points from the input data according to a preset step size; mapping the plurality of data points extracted each time to the same position at different depth levels of three-dimensional data to obtain rearranged data; and performing convolution operation on the rearranged data with a convolution kernel of a preset size to obtain a convolution result. Through the present solution, the operation efficiency of the convolutional neural network can be improved.

Abstract: The disclosure discloses a visual multi-object tracking based on multi-Bernoulli filter with YOLOv3 detection, belonging to the fields of machine vision and intelligent information processing. The disclosure introduces a YOLOv3 detection technology under a multiple Bernoulli filtering framework. Objects are described by using anti-interference convolution features, and detection results and tracking results are interactively fused to realize accurate estimation of video multi-object states with unknown and time-varying number. In a tracking process, matched detection boxes are combined with object tracks and object templates to determine new objects and re-recognize occluded objects in real time. Meanwhile, under the consideration of identity information of detected objects and estimated objects, identity recognition and track tracking of the objects are realized, so that the tracking accuracy of the occluded objects can be effectively improved, and track fragments are reduced.

Abstract: Disclosed herein are methods, systems, and apparatus, including computer programs encoded on computer storage media, for managing blockchain-based centralized ledger systems. One of the methods includes transmitting a timestamp request for a to-be-timestamped block of a blockchain at a time point to a trust time server by a ledger server in a blockchain-based centralized ledger system that stores data in the blockchain, the trust time server being associated with a trust time authority and independent from the blockchain-based centralized ledger system, the blockchain including a plurality of blocks storing transaction data, and disregarding the timestamp request in response to determining that a predetermined time period has lapsed after the time point and that there has been no reply to the timestamp request from the trust time server.

Abstract: The invention provides an array substrate and touch display device. The array substrate comprises: a plurality of sub-pixel units arranged in array, a plurality of touch sensing lines and DC power lines; a touch sensing line being provided for each column of sub-pixel units, and a DC power line being provided for each row of sub-pixel units, each sub-pixel unit comprising a photosensitive TFT, and the photosensitive TFT having a floating gate, a source electrically connected to the corresponding DC power line, and a drain electrically connected to the corresponding touch sensing line. The photosensitive TFT absorbs infrared radiation emitted by biological being when touched by biological being, thereby achieving conduction to transmit the voltage on DC power line to touch sensing line to complete touch sensing. The touch function is integrated into sub-pixel unit. No additional touch panel is required, which can reduce production cost and prevent erroneous operation.

Abstract: A system for a vehicle including a traction battery, electrical loads, and a controller configured to, during a charge operation, activate the loads such that charge current output by a charger is consumed by the loads and charge current input to the battery approaches zero to update a state of charge (SOC) value of the battery, and deactivate the loads upon completion of the update such that charge current input to the battery increases.

Abstract: Disclosed herein are methods, systems, and apparatus, including computer programs encoded on computer storage media, for managing blockchain-based centralized ledger systems. One of the methods includes transmitting individual timestamp requests for to-be-timestamped blocks in a blockchain to a trust time server independent from a blockchain-based centralized ledger system that stores data in the blockchain, the blockchain including a plurality of blocks storing transaction data, receiving respective timestamps and associated signatures for the to-be-timestamped blocks from the trust time server, and storing information of the respective timestamps and associated signatures for the to-be-timestamped blocks in respective timestamped blocks in the blockchain, any adjacent two of the timestamped blocks in the blockchain being anchored with each other.

Abstract: A load balancer system having multiple load balancer machines working in parallel. At any given time, one of the load balancer machines is assigned to act as the current distributor that distributes web client communications and/or requests to the other load balancer machines in the load balancer system. However, these web client communications and/or requests are directed to a distributor module on all of the active, parallel load balancer machines in the system (for example, by the expedient of a common virtual IP address for layer 3/4 communications) in case the currently active distributor fails and one of the other active load balancer machines suddenly needs to take on the distributor role. In this way, web client communications are not lost when the current distributor machine fails.

Abstract: A formulation technology for low pressure two component polyurethane foam-funning compositions containing gaseous hydrohaloolefin blowing agents is described with improved storage stability and extended shelf-life. The “B”-side component of the formulations contain a gaseous hydrohaloolefin blowing agent and a polyol pre-mix, the polyol pre-mix comprising liquid blowing agent, polyol, and a catalyst containing at least one catalytic metal compound.

Abstract: The present disclosure relates to an electronic apparatus, a method and a computer-readable storage medium for a wireless communication system. The electronic apparatus for a wireless communication system according to the present disclosure comprises: a processing circuit, configured to generate resource allocation information according to interference conditions encountered by user equipment (UE), wherein a current altitude of the UE is higher than an altitude threshold, and sending the resource allocation information to base station equipment of other cells apart from neighboring cells of a current serving cell of the UE, so as to configure information sending resources for the base station equipment of the other cells. The electronic device, method and computer-readable storage medium of the present disclosure are capable of reducing information interference generated in a wireless communication system of an unmanned aerial vehicle device.

Abstract: Disclosed herein are methods, systems, and apparatus, including computer programs encoded on computer storage media, for managing blockchain-based centralized ledger systems. One of the methods includes: transmitting a timestamp request for a to-be-timestamped block in a blockchain to a trust time server by a ledger server in a centralized ledger system that stores data in the blockchain, the trust time server being associated with a trust time authority and independent from the centralized ledger system, the blockchain including a plurality of blocks storing transaction data, receiving a timestamp and associated signature for the to-be-timestamped block from the trust time server by the ledger server, and storing information of the timestamp and the associated signature for the to-be-timestamped block in the blockchain by the ledger server.

Abstract: Disclosed herein are lipid nanoparticles having a specific composition, compositions including such lipid nanoparticles, and methods of treatment using such lipid nanoparticles and compositions.

Abstract: Disclosed herein are methods, systems, and apparatus, including computer programs encoded on computer storage media, for managing blockchain-based centralized ledger systems. One of the methods includes: transmitting a timestamp request for a to-be-timestamped block in a blockchain to a trust time server by a ledger server in a centralized ledger system that stores data in the blockchain, the trust time server being associated with a trust time authority and independent from the centralized ledger system, the blockchain including a plurality of blocks storing transaction data, receiving a timestamp and associated signature for the to-be-timestamped block from the trust time server by the ledger server, and storing information of the timestamp and the associated signature for the to-be-timestamped block in the blockchain by the ledger server.

Abstract: An agitator for vibrating a drill string includes an agitator housing, a rotor and an agitation mass. The drill string has a central axis. The rotor is coupled to the agitator housing and being rotatable about an agitator axis. The agitation mass is coupled to the rotor and is rotatable about the agitator axis. During rotation, a center of mass of the agitation mass is spaced apart from the agitator axis to cause deflection of the agitator axis relative to the central axis to produce vibration in the drill string.

Abstract: Implementations of this specification provide service identifier-based data indexing. An example method performed by a data indexing apparatus of a centralized database service provider that stores data by using a blockchain-type ledger includes obtaining a service identifier and a service label of a data record, the service identifier uniquely identifying a service attribute of the data record, and the service label representing a type of the data record; determining location information of the data record in the blockchain-type ledger, the location information including a block height of a data block that includes the data record, and a positional offset of the data record in the data block that includes the data record; establishing a mapping relationship among the service identifier, the service label, and the location information; and writing the mapping relationship into an index for which a primary key is the service identifier.

Abstract: This disclosure relates to blockchain-type storage of receipt data. In one aspect, a method includes obtaining a to-be-stored data record including a first service attribute. Execution information of the to-be-stored data record is determined. A previous data record is obtained from a blockchain-type ledger. The previous data record includes a second service attribute that is the same as the first service attribute. Each data block in the blockchain-type ledger includes a block header and a block body. A hash value of the previous data record is determined. A receipt record is generated. The receipt record includes the hash value of the previous data record and the execution information of the to-be-stored data record. The to-be-stored data record and the receipt record are written into a same block body in the blockchain-type ledger.

Abstract: The invention provides an array substrate and touch display device. The array substrate comprises: a plurality of sub-pixel units arranged in array, a plurality of touch sensing lines and DC power lines; a touch sensing line being provided for each column of sub-pixel units, and a DC power line being provided for each row of sub-pixel units, each sub-pixel unit comprising a photosensitive TFT, and the photosensitive TFT having a floating gate, a source electrically connected to the corresponding DC power line, and a drain electrically connected to the corresponding touch sensing line. The photosensitive TFT absorbs infrared radiation emitted by biological being when touched by biological being, thereby achieving conduction to transmit the voltage on DC power line to touch sensing line to complete touch sensing. The touch function is integrated into sub-pixel unit. No additional touch panel is required, which can reduce production cost and prevent erroneous operation.

Abstract: This disclosure relates to blockchain-type data storage. In one aspect, a method includes receiving, by a database server, multiple second data records. Each second data record includes a first data record having a user identifier and a digital signature of the first data record. Hash values of the second data records are determined. In response to a blockchain-type block generation condition being satisfied, the database server determines two or more second data records to be written in a data block. An Nth data block that includes a hash value and a block height is generated. N is a sequence number of the Nth data block in a sequence of data blocks. When N>1, generating the Nth data block includes determining the hash value for the Nth data block based on the hash values of the two or more second data records and a hash value of a (N?1)th data block.

Abstract: A computer-implemented method includes: receiving, by a server storing one or more blockchain ledgers, an authorization request from a client, in which the authorization request includes a service end identifier and a user identifier; generating, based on the authorization request, a database authorization instruction corresponding to the authorization request and a ledger identifier corresponding to the authorization request; authorizing a service end corresponding to the service end identifier as a user in a blockchain ledger corresponding to the ledger identifier; configuring a permission value of the user in the blockchain ledger, in which the permission value determines a degree to which the service end can operate the blockchain ledger; and sending authorization information including the user identifier and the ledger identifier to the service end.

Abstract: A computer-implemented method for performing authentication includes: determining, by a database server storing data in a blockchain ledger, a target ledger segment on which time service authentication is to be performed; generating a Merkle tree corresponding to the target ledger segment; determining a root hash of the Merkle tree, the root hash of the Merkle tree being based on a block hash of each data block in a set of one or more data blocks; executing a predetermined time capture process in a trusted execution environment to obtain a trusted time from an interface provided by a trusted time service organization; generating a digital signature for the trusted time and the root hash in the trusted execution environment; and generating a time service certificate including the trusted time, the root hash, and the digital signature.

Abstract: A load balancer system having multiple load balancer machines working in parallel. At any given time, one of the load balancer machines is assigned to act as the current distributor that distributes web client communications and/or requests to the other load balancer machines in the load balancer system. However, these web client communications and/or requests are directed to a distributor module on all of the active, parallel load balancer machines in the system (for example, by the expedient of a common virtual IP address for layer 3/4 communications) in case the currently active distributor fails and one of the other active load balancer machines suddenly needs to take on the distributor role. In this way, web client communications are not lost when the current distributor machine fails.