Abstract: Disclosed are a manganese-doped cobaltosic tetroxide, and a preparation method and application thereof, belonging to the field of battery materials. The preparation method of the manganese-doped cobaltosic tetroxide of the disclosure dopes a manganese element into cobalt carbonate with a specific process and matched with a composite surfactant, which can obtain manganese-doped cobaltosic tetroxide particle products with uniform particle size, dispersion and fineness through high-temperature sintering, a proportion of low-valence manganese in the doped manganese is high, and a crystal form of the products obtained by sintering is complete. The preparation method is simple in operation and can realize industrial large-scale production. The manganese-doped cobaltosic tetroxide prepared by the preparation method and the application thereof are also disclosed.

Abstract: Systems and methods for generating, selecting, and implementing rule-based strategies are disclosed. An input data set representing a plurality of interactions that may be classified as malicious or non-malicious is received and at least one strategy tree including a plurality of rule-based strategies is generated. The at least one strategy trees is generated by a machine learning model configured to generate a tree structure. The rule-based strategies are ranked based on a precision-recall-stability (PRS) score generated for each of the rule-based strategies and at least a first rule-based strategy having a highest PRS score is extracted. One or more interactions are evaluated using the first rule-based strategy to determine when the one or more interactions are malicious.

Abstract: Disclosed are a manganese-doped cobaltosic tetroxide, and a preparation method and application thereof, belonging to the field of battery materials. The preparation method of the manganese-doped cobaltosic tetroxide of the disclosure dopes a manganese element into cobalt carbonate with a specific process and matched with a composite surfactant, which can obtain manganese-doped cobaltosic tetroxide particle products with uniform particle size, dispersion and fineness through high-temperature sintering, a proportion of low-valence manganese in the doped manganese is high, and a crystal form of the products obtained by sintering is complete. The preparation method is simple in operation and can realize industrial large-scale production. The manganese-doped cobaltosic tetroxide prepared by the preparation method and the application thereof are also disclosed.

Abstract: A method is provided for resharding a sharded database sharded according to a first shard key. The method includes: receiving, by a processor an instruction to reshard the sharded database; receiving, at the processor, a new shard key to be used in a resharding process to reshard the sharded database; determining, by the processor, whether a duration of unavailability of the sharded database during the resharding process is less than a predetermined amount of time; and automatically performing, by the processor, the resharding process according to the new shard key to produce a resharded database, if the duration of unavailability is less than the predetermined amount of time. The method may be performed without users noticing a significant interruption to read/write operations from/to the database.

Abstract: Disclosed is a maximum communication delay measurement method for safe braking of a smart connected vehicle; the measurement method is: first performing parameter initialization, the parameters for initialization comprising vehicle braking parameters, kinematic/kinetic parameters, and communication parameters; then generating a braking force function of the vehicle, taking the minimum distance between vehicles as the objective, and solving for the maximum allowable communication delay between vehicles on the basis of the proposed evaluation method.

Abstract: Systems and methods for generating, selecting, and implementing rule-based strategies are disclosed. An input data set representing a plurality of interactions that may be classified as malicious or non-malicious is received and at least one strategy tree including a plurality of rule-based strategies is generated. The at least one strategy trees is generated by a machine learning model configured to generate a tree structure. The rule-based strategies are ranked based on a precision-recall-stability (PRS) score generated for each of the rule-based strategies and at least a first rule-based strategy having a highest PRS score is extracted. One or more interactions are evaluated using the first rule-based strategy to determine when the one or more interactions are malicious.

Abstract: The disclosure discloses a method for preparing a high-voltage cathode material by body modification and regeneration of a waste lithium cobaltate material.

Abstract: According to aspects of the disclosure, there is provided a scalable cloud distributed database system for hosting data of multiple database tenants. In some embodiments, the database may be serverless. The serverless database may be configured to automatically and dynamically match resources to workload demands for tenants of the database. Databases described herein may include replica sets hosting multiple tenants. Tenants may be migrated from one replica set to another replica set based on usage. Usage of tenants may be throttled during migration between replica sets. Tenants with lower usage may be selected for migration between replica sets. During migration, files containing both a document and a history of updates to the document may be migrated. Databases described herein may include multiple storage tiers having different read and/or write speeds.

Abstract: A method is provided for resharding a sharded database sharded according to a first shard key. The method includes: receiving, by a processor an instruction to reshard the sharded database; receiving, at the processor, a new shard key to be used in a resharding process to reshard the sharded database; determining, by the processor, whether a duration of unavailability of the sharded database during the resharding process is less than a predetermined amount of time; and automatically performing, by the processor, the resharding process according to the new shard key to produce a resharded database, if the duration of unavailability is less than the predetermined amount of time. The method may be performed without users noticing a significant interruption to read/write operations from/to the database.

Abstract: A system and method for determining consensus within a distributed database are provided. According to one aspect, a protocol is provided that reduces or eliminates heartbeat communication between nodes of a replica set. Nodes may communicate liveness information using existing database commands and metadata associated with the database commands. According to another aspect, improved systems and methods are provided for detection of node failures and election of a new primary node.

Abstract: The disclosure discloses a method for preparing a high-voltage cathode material by body modification and regeneration of a waste lithium cobaltate material.

Abstract: A system and method for determining consensus within a distributed database are provided. According to one aspect, a protocol is provided that reduces or eliminates heartbeat communication between nodes of a replica set. Nodes may communicate liveness information using existing database commands and metadata associated with the database commands. According to another aspect, improved systems and methods are provided for detection of node failures and election of a new primary node.

Abstract: A system and method for determining consensus within a distributed database are provided. According to one aspect, a protocol is provided that reduces or eliminates heartbeat communication between nodes of a replica set. Nodes may communicate liveness information using existing database commands and metadata associated with the database commands. According to another aspect, improved systems and methods are provided for detection of node failures and election of a new primary node.

Abstract: A device for averaging a sensed current includes a sampling circuit that samples at least two sampling points of each cycle of a front-end alternating current (AC) sensed signal. The two sampling points is substantially symmetrical with respect to a midpoint of each respective cycle of the front-end AC sensed signal. The device also includes a timing circuit that controls a timing of the sampling circuit to sample the front-end AC sensed signal on the at least two sampling points based on a timing signal generated by the timing circuit. The device further includes an averaging circuit that averages the two sampling points for a given cycle of the front-end AC sensed signal to produce an average sensed current.

Abstract: A system and method for determining consensus within a distributed database are provided. According to one aspect, a protocol is provided that reduces or eliminates heartbeat communication between nodes of a replica set. Nodes may communicate liveness information using existing database commands and metadata associated with the database commands. According to another aspect, improved systems and methods are provided for detection of node failures and election of a new primary node.

Abstract: A device for averaging a sensed current includes a sampling circuit that samples at least two sampling points of each cycle of a front-end alternating current (AC) sensed signal. The two sampling points is substantially symmetrical with respect to a midpoint of each respective cycle of the front-end AC sensed signal. The device also includes a timing circuit that controls a timing of the sampling circuit to sample the front-end AC sensed signal on the at least two sampling points based on a timing signal generated by the timing circuit. The device further includes an averaging circuit that averages the two sampling points for a given cycle of the front-end AC sensed signal to produce an average sensed current.

Abstract: A facility is connected to an electricity utility and is responsive to Demand Response Events. A plurality of devices is each individually connected to the electricity grid via an addressable switch connected to a secure network that is enabled to be individually switched off by a server. An occupant of a room in control of the plurality of devices provides via a Human Machine Interface on a tablet a preferred order of switching off the plurality of devices in case of a Demand Response Event. A configuration file based at least partially on the preferred order and on a severity of the Demand Response Events determines which devices which of the plurality devices will be switched off. The server accesses the configuration file and switches off the devices included in the configuration file.

Abstract: A system and method for determining consensus within a distributed database are provided. According to one aspect, a protocol is provided that reduces or eliminates heartbeat communication between nodes of a replica set. Nodes may communicate liveness information using existing database commands and metadata associated with the database commands. According to another aspect, improved systems and methods are provided for detection of node failures and election of a new primary node.

Abstract: A system and method for determining consensus within a distributed database are provided. According to one aspect, a protocol is provided that reduces or eliminates heartbeat communication between nodes of a replica set. Nodes may communicate liveness information using existing database commands and metadata associated with the database commands. According to another aspect, improved systems and methods are provided for detection of node failures and election of a new primary node.

Abstract: A system for managing software application licenses includes a physical machine (10) including computer system hardware. A hypervisor operates on the physical machine. A plurality of application virtual machines (11a, 11b) are instantiated on the hypervisor. Each of the plurality of application virtual machines executes at least one licensed software application (12a, 12b) and a local license manager (13a, 13b) for managing a license file of the licensed software application. A master license manager (15) executes on the physical machine. The master license manager is configured to receive the license files (16) of the licensed software application from the local license managers of each of the plurality of application virtual machines.