Abstract: The disclosure provides an electric vehicle. The electric vehicle includes: a vehicle body provided with a power input port and a power supply device. The power supply device includes a charger and a detachable battery pack. The charger includes a power interface for obtaining external power, a charging portion provided with a docking interface, an output part, and a control unit. The output part includes a first power output interface connected with the power input port to supply power to the electric vehicle. When the power interface is connected with the external power, the control unit controls the charging portion to charge the battery pack.

Abstract: Disclosed are a vending method of an intelligent vending station, an intelligent vending station, an electronic device, and a storage medium. The method comprises the following steps of: determining a target item and a target vending device according to a purchase instruction from a user; determining a target cabinet accommodating the target item and determining a target conveying device; controlling the target conveying device to acquire the target item from the target cabinet and to convey the acquired target item to a receiving area of the target vending device.

Abstract: A method for re-recognizing an object image is provided based on multi-feature information capture and correlation analysis weights of an input feature map by using a convolutional layer with a spatial attention mechanism and a channel attention mechanism, causing channel and spatial information to effectively combined, which not only focus on an important feature and suppress an unnecessary feature, but also improve a representation of a feature. A multi-head attention mechanism is used to process a feature after an image is divided into blocks to capture abundant feature information and determine a correlation between features to improve performance and efficiency of object image retrieval. The convolutional layer with the channel attention mechanism and the spatial attention mechanism is combined with a transformer having the multi-head attention mechanism to focus on globally important features and capture fine-grained features, thereby improving performance of re-recognition.

Abstract: This application provides a power supply system. The power supply system includes first switch module, an UPS, and a plurality of power consumption branches. An input end of the first switch module is connected to a plurality of power supply apparatuses. An output end of the first switch module is connected to an input end of the UPS. The first switch module is switched between the plurality of power supply apparatuses to supply power to the UPS. An output end of the UPS is connected to each power consumption branch. The UPS is configured to receive electric energy and input a first voltage to each power consumption branch. Each power consumption branch includes a first transformer module and at least one power consumption load. The first transformer module is configured to convert the first voltage into a second voltage, and then provide the second voltage to the power consumption load.

Abstract: A battery carrier apparatus includes a carrier housing, a plurality of compartments, at least one wheel, a control circuit and a status monitoring circuit. The carrier housing is configured to hold multiple battery modules. The plurality of compartments are disposed within the carrier housing. Each compartment is configured for detachably installing a respective battery module. The compartments provide secure housing for the battery modules. At least one wheel is disposed on the carrier housing. The wheel facilitates movement of the carrier housing allowing for transportation of the carrier housing. The control circuit is responsible for managing an operation of the battery modules installed in the compartments. The status monitoring circuit is coupled to the control circuit. The status monitoring circuit detects a status of the installed battery modules and communicates the status to the control circuit for determining a control behavior to manage the battery modules accordingly.

Abstract: A power distribution circuit. The power distribution circuit includes an alternating current input end, a direct current input end, an alternating current load input end, a direct current load input end, a switch circuit, a DC/AC converter, a DC/DC converter, and a control unit. The power distribution circuit may convert an alternating current input by a mains system into a stable direct current and a stable alternating current, to provide stable electrical signals for an alternating current load and a direct current load.

Abstract: Embodiments of this application provide a power supply circuit, including a first power conversion module, a plurality of battery banks, a first bus, and a second bus. A first wiring terminal of the first power conversion module is connected to the battery bank, a second wiring terminal of the first power conversion module is connected to the first bus and the second bus, and the first power conversion module is configured to: perform direct current to direct current (DC/DC) conversion on a current output by a corresponding battery bank, and output currents to the first bus and the second bus. In this application, a quantity of battery banks are set to be less than a quantity of inverters in a UPS system, so that costs are reduced.

Abstract: The disclosure provides an electric vehicle. The electric vehicle includes: a vehicle body provided with a power input port and a power supply device. The power supply device includes a charger and a detachable battery pack. The charger includes a power interface for obtaining external power, a charging portion provided with a docking interface, an output part, and a control unit. The output part includes a first power output interface connected with the power input port to supply power to the electric vehicle. When the power interface is connected with the external power, the control unit controls the charging portion to charge the battery pack.

Abstract: Data usage by networking and data processing services is measured using a timeslot system. The timeslots have multiple states for collecting, collecting with processing, and expired timeslots. Data from upstream components is reported to local manager clusters and placed into timeslots corresponding to a timestamp of the data. Data can be reported from local managers to an entitlement service and/or a cloud service portal. Timing inconsistencies due to latency or processing time can be resolved by accounting for a timestamp difference using a timestamp difference value between the timeslot time and the reporting time. Data can be deduplicated, cleaned, and/or compacted. Data can be also be version controlled, with timeslots maintaining a version number. Complete and accurate tracking of data usage and associated costs is improved by reporting and collecting usage data using state-based timeslots.

Abstract: A preparation method of a molecularly imprinted polymer (MIP) for separation and concentration of 4-methylsterane compounds is provided. A template molecule, a functional monomer, a porogen, an initiator and a cross-linking agent are mixed and subjected to polymerization to prepare a polymer with the template molecule, which is then treated to remove the template molecule, so as to give the desired MIP. The template molecule is ?-sitosterol or deoxycholic acid. The obtained molecularly imprinted polymer has multiple stable hole structures and binding sites inside, and has memory and recognition functions for the 4-methylsterane compounds, exhibiting excellent specific adsorption performance. The MIP can contribute to the accurate identification of correlation between depositional environment and maturity of crude oils or source rocks. A molecularly imprinted polymer prepared by such method, a chromatographic column and an application thereof are also provided.

Abstract: A power supply system includes a bypass branch, at least two energy storage branches, and a controller. An input of the bypass branch is configured to connect to a power supply, and an output of the bypass branch is configured to supply power to a load. An output of each energy storage branch is configured to connect the load to the output of the bypass branch. Each energy storage branch includes an energy storage unit and a bidirectional inverter unit, and the bidirectional inverter unit is configured to, when the energy storage branch operates in a charging mode, convert an alternating current provided by the bypass branch into a direct current and output the direct current to the energy storage unit. The bidirectional inverter unit is also configured to, when the energy storage branch operates in a discharging mode, convert a direct current provided by the energy storage unit into an alternating current.

Abstract: This application provides an uninterruptible power supply. An input end of the uninterruptible power supply is connected to a power supply by using a first on-off control module. A controller of the uninterruptible power supply is configured to: after receiving a first control signal sent by the first on-off control module, control a current in a circuit connecting the uninterruptible power supply and the first on-off control module to be zero. An output end of the uninterruptible power supply is connected to a load by using a second on-off control module. A controller of the uninterruptible power supply is configured to: after receiving a second control signal sent by the second on-off control module, control the uninterruptible power supply to be turned off.

Abstract: This application discloses a non-current equalization UPS apparatus, a current distribution method, and a parallel UPS system. The current distribution method may be applied to any UPS apparatus in a parallel UPS system. A current proportion of a first current output by the any UPS apparatus in a total output current of the parallel UPS system is positively related to a capacity proportion of an available battery capacity of a battery string correspondingly connected to the any UPS apparatus in a total available battery capacity of the parallel UPS system. Therefore, a system backup time of the parallel UPS system can be prolonged, and resource utilization of a battery string with a large available battery capacity can be improved.

Abstract: An example method of configuring an entitlement service that manages entitlement of software in a virtualized computing system includes: receiving, at a plug-in of the entitlement service, software component data that specifies a component type and offerings of the component type, the offerings associated with feature sets, the entitlement service executing on a cloud platform in the virtualized computing system; storing, by the plug-in, the software component data in a database; and notifying, by the plug-in, the entitlement service to support entitlement of components of the software having the component type.

Abstract: An inverter system includes an inverter bridge, an inductor and a controller. The inverter bridge includes first, second, third and fourth power switches. The inductor is connected between the inverter bridge and a power grid. The controller is configured to control both the second power switch and the third power switch to be turned on or both the first power switch and the fourth power switch to be turned on within a first time period of each power frequency cycle. The first time period is from a moment when a current of the power grid becomes zero to a moment when a voltage of the power grid becomes zero. The current of the power grid is in inverse phase with the voltage of the power grid in the first time period, so that reactive power is stored in the inductor.

Abstract: An axle assembly and a method of assembly. An outboard wheel is mounted to an outboard mounting arrangement of a wheel hub. An inboard wheel and a brake drum are mounted to an inboard mounting arrangement of the wheel hub such that a brake drum mounting arrangement of the brake drum is axially positioned between the inboard wheel and the inboard mounting arrangement.

Abstract: This application provides an uninterruptible power supply (UPS), an uninterruptible power supply control method, a related apparatus, and a system. In one example, the UPS determines a target value of a SOC of a battery of the UPS; and controls, based on the determined target value, a rectifier circuit and a direct current-to-direct current circuit in the UPS to charge the battery to make the SOC of the battery equal to the target value, or controls, based on the determined target value, an inverter circuit and a direct current-to-direct current circuit in the UPS to discharge the battery to make the SOC of the battery equal to the target value.

Abstract: The present invention provides a laminated sheet, a cylindrical filter element, and a filtration kit that are used to perform water filtration. Specifically, the laminated sheet used to perform water filtration includes: a pre-filtration layer, the pre-filtration layer including a first fiber having a diameter within a range of 1-5 ?m and a second fiber having a diameter within a range of 200-900 nm, and the pre-filtration layer having a pore diameter within a range of 0.2-1 ?m; and a fine filtration layer, the fine filtration layer having a pore diameter within a range of 0.02-0.5 ?m, wherein the pore diameter of the pre-filtration layer is greater than the pore diameter of the fine filtration layer. The laminated sheet used to perform water filtration and the cylindrical filter element and the filtration kit including the same according to the technical solution of the present invention have an extremely small pressure difference, high filtration efficiency, and a long service life.

Abstract: A system includes a housing, a terminal part, an input end, an output end and a switching device. The terminal part is arranged on the housing and is matched with a battery pack. The input end is electrically connected with the terminal part. The output end is configured to output energy to an outside. The switching device includes a first switching structure and a second switching structure arranged in the housing and electrically connected with the output end. The first/second switching structure may be switched between a first state and a second state to output a first voltage or a second voltage.

Abstract: An axle assembly having a brake drum and inboard and outboard wheels. The brake drum the inboard wheel may cooperate to inhibit movement of the inboard wheel in an inboard direction. An outboard wheel clamp and an outboard split ring may cooperate to inhibit movement of the outboard wheel in an outboard direction.