Abstract: The battery management system includes: a plurality of switch assemblies, each being connected between a battery and a corresponding load, and configured to connect the battery to the corresponding load or disconnect the battery from the corresponding load; a sampling circuit including sampling branches in a one-to-one correspondence with the plurality of switch assemblies, and each sampling branch being configured to acquire a voltage at a sampling detection point, where a first end of each sampling branch is connected to a corresponding switch assembly, and a connection point is the sampling detection point; a second end of each sampling branch is connected to a voltage source, and a connection point is a reference sampling point; and a third end of each sampling branch is connected to a sampling module; the voltage source, configured to supply a reference voltage to the reference sampling point; and the sampling module.

Abstract: The present application provides an electric vehicle and a battery system. The electric vehicle comprises: a frame; a first power consumption unit and a second power consumption unit, the first power consumption unit and the second power consumption unit being connected to the frame; and a battery system, comprising a first power supply unit and a second power supply unit, the first power supply unit and the second power supply unit each comprising at least one battery pack, the first power supply unit supplying power to the first power consumption unit, and the second power supply unit supplying power to the second power consumption unit, wherein the at least one battery pack can supply power to a handheld tool.

Abstract: A system and method are provided for enhanced schema discovery and query generation.

Abstract: The present disclosure discloses a battery comprising a housing, a cover, and a battery cell, wherein the housing defines an accommodating cavity, and one end of the housing is provided with an opening communicated with the accommodating cavity; the opening is circular in shape, and the housing is in a shape of a regular polygonal prism; the cover covers the opening and is connected to the housing; the battery cell is provided in the accommodating cavity, which is a cylindrical cavity. Since the housing is in the shape of a regular polygonal prism, it is beneficial for alignment and assembly, and there is no need for additional fixing brackets. Further, when adjacent batteries are combined, there is no gap therebetween, thereby achieving high space utilization and more secure fixation. Moreover, the cylindrical accommodating cavity of the battery can be uniformly stressed, thereby improving structural safety and reliability.

Abstract: A construction process for partially bonded prestressed uplift-resistant glass fiber anchor piles avoiding stress concentration includes the following steps: construction site management, determining anchor pile locations, drilling a borehole using a spiral drilling rig, lowering a pre-fabricated glass fiber rod cage into the borehole after inspection, performing grouting, making adjustments, and repeating the above operations. The construction process adopts a layout that avoids stress concentration, demonstrating its superiority in strata with developed horizontal bedding. Simultaneously, it uses glass fiber material with good corrosion resistance, meeting the requirements for uplift-resistant anchors under corrosive conditions. It employs a partially bonded prestressed design, changing the mechanical characteristic of traditional uplift-resistant anchors from becoming looser when pulled to a wedge-like characteristic of becoming tighter when pulled.

Abstract: The mower fleet management device is configured to control a plurality of mowers to work in collaboration. Each of the mowers includes an on-board communication module and an on-board positioning and navigation module. The mower fleet management device includes: a map loading module configured to acquire a map of a working land parcel; a control terminal communication module configured to wirelessly communicate with the on-board communication modules to acquire status information of the mowers; and a working region assigning module configured to assign a working region to each of the mowers according to the status information and the map. The on-board positioning and navigation module of each of the mowers guides the mower to work in the corresponding working region according to the assigned working region.

Abstract: A chemical mechanical polishing system includes a first polishing station including a first platen to support a first polishing pad, a transfer station to receive a substrate from a robot, a carrier head movable on a predetermined path from the polishing station to the transfer station, a gas flow regulator having an input for a carrier gas, a liquid flow regulator having an input for a cleaning liquid, and a fluid jet cleaner at a position along the predetermined path. The fluid jet cleaner includes an atomizer nozzle including an input port coupled to the gas flow regulator, an injection port coupled to the liquid flow regulator, and an output port positioned to spray the cleaning liquid entrained in the carrier gas onto the substrate held by the carrier head when the carrier head is located above the fluid jet cleaner.

Abstract: The present disclosure relates to a three-dimensional (3D) printing ink for Pleurotus eryngii and a preparation method for and use of the 3D printing ink and a preparation method for 3D printed food of Pleurotus eryngii. The present disclosure adopts Pleurotus eryngii freeze-dried powder which reduces a moisture content of Pleurotus eryngii. In addition, the problem that the Pleurotus eryngii with high fiber content blocks a nozzle for 3D printing can be solved by making the Pleurotus eryngii into small particle powder, and bioactive substances in the Pleurotus eryngii can be retained as much as possible. The addition of hydrocolloid can improve rheological properties of the Pleurotus eryngii freeze-dried powder, which increases viscosity of the 3D printing ink for Pleurotus eryngii, and enhances mechanical strength of the 3D printing ink, such that the ink can maintain the print shape and is not easy to collapse.

Abstract: A multi-thread scheduling method, a server, and a computer system, are described. The method includes: determining an affinity between the first thread and the second thread based on first memory access information of the first thread in a first running phase and second memory access information of the second thread in a second running phase; determining a first node based on the first memory access information, the second memory access information, and the affinity; determining that a resource measurement value of the first node is less than a resource threshold; and selecting, from the first node, a processor configured to run the first thread and the second thread.

Abstract: A liquid leakage detection circuit including: a sampling circuit, the sampling circuit having an output end connected to an input end of an excitation source circuit and used for sending a control signal to the excitation source circuit; and the excitation source circuit , the excitation source circuit having an output end connected to a signal detection circuit and used for generating an excitation signal on the basis of the control signal and sending the excitation signal to the signal detection circuit, and the excitation signal being a periodic pulse signal. The sampling circuities further used for collecting a liquid leakage state signal of a battery pack in the signal detection circuit, wherein the liquid leakage state signal is generated in response to the excitation signal, so that liquid leakage detection for the battery pack can be achieved. A liquid leakage detection system and a battery management system is disclosed.

Abstract: An optical system includes a first lens having a first curved surface and a second curved surface, a second lens including a concave first surface and a flat second surface, a third lens including a first surface and a convex second surface, a reflective polarizer on the second curved surface of the first lens, a quarter waveplate on the flat second surface of the second lens, a display, a circular polarizer on the display and facing the convex second surface of the third lens, and at least one geometric phase lens between the third lens and the circular polarizer.

Abstract: An impact-sliding composite fretting corrosion testing machine suitable for a high-temperature lead-bismuth environment includes a test bench, a lead-bismuth pipeline, a test kettle, a melting kettle, an excitation system, and a gas circuit control system. The lead-bismuth pipeline is connected to the bottom of the test kettle and the bottom of the melting kettle respectively. A clamping component is set inside the test kettle. The excitation system includes a signal generator, the first power amplifier, the second power amplifier, the first exciter, the second exciter and an excitation fixture. The clamping component includes an upper support plate, a plate sample fixture, a pipe sample, a pipe sample fixture, a cantilever rod, a cantilever rod fixture, a lower support plate, a rotating block, and a movable pin shaft. The impact-sliding composite fretting corrosion testing machine solves the problem that the fretting corrosion behavior cannot be fully studied.

Abstract: A super-junction semiconductor device with an enlarged process window for a desirable breakdown voltage includes: a semiconductor substrate and an epitaxial layer deposited on the semiconductor substrate. The epitaxial layer includes a first semiconductor layer, and a second semiconductor layer disposed on the first semiconductor layer. A band gap of the first semiconductor layer is greater than a band gap of the second semiconductor layer. A super-junction structure is formed in the epitaxial layer, including at least one first epitaxial pillar of a first dopant type, and at least one second epitaxial pillar of a second dopant type. The first epitaxial pillar and the second epitaxial pillar are alternately arranged along a transverse direction. The epitaxial layer has a sandwich structure.

Abstract: Systems and methods are disclosed for training an electronic document extraction model, including the generation of the training data to train the model based on sampling a pool of electronic documents based on a rareness metric of the documents. Each electronic document has a document-level rareness metric generated, with the document-level rareness metric being based on one or more of a structural rareness metric or a content rareness metric of the document. The structural rareness metric measures the rareness of the document structure, which may be irrespective of the text content of the document. The content rareness metric measures the rareness of the document content, which may be irrespective of the document structure. The electronic documents are sampled based on the document-level rareness metrics to increase the number of rare documents in the training data without unduly biasing the sampling to optimize the training data for training the extraction model.

Abstract: The present disclosure pertains to the field of data sharing and particularly discloses an access control method based on outsourced computation and attribute-based searchable encryption on blockchain. The method comprises steps of generating a system public key and a master key, and generating a user attribute private key; formulating an access control policy to assist an outsourced encryption service provider in performing a partial encryption using a data ciphertext storage address and a symmetric key, and uploading a blockchain; generating a search trapdoor and sending the search trapdoor to the blockchain to verify the user attribute; and partially decrypting the ciphertext with assistance of the outsourced decryption service, followed by local decryption to obtain a data storage address and the symmetric key. The present disclosure alleviates the computational burden of local encryption and decryption for users, and leads to a significant improvement in data sharing efficiency and security.