Abstract: Provided are a battery cell, a battery, an electrical device, and a manufacturing method and device for a battery cell, which belong to the field of battery technologies. The battery cell includes a case, an electrode assembly, an end cover, and a current collecting member. The case has an opening. The electrode assembly is accommodated in the case. The end cover covers the opening and is sealed and connected to the case. The current collecting member is accommodated in the case and located at a side of the electrode assembly facing the end cover. The current collecting member is configured to connect the case and the electrode assembly to electrically connect the electrode assembly to the case. The battery cell with such structure realizes an electrical connection between the electrode assembly and the case through the current collecting member. During assembling of the battery cell.

Abstract: The present invention relates to the technical field of mine fire prevention and extinguishing, in particular to a liquid nitrogen direct injection and low-temperature foaming intelligent filling system based on mine fire area characteristics and an application method, comprising a liquid nitrogen storage tank, a liquid nitrogen direct injection system and a low-temperature foaming system, wherein the liquid nitrogen storage tank communicates with a liquid nitrogen pressurizing device through a main pipeline; a temperature control unit is arranged on the main pipeline; and the liquid nitrogen pressurizing device is connected with the liquid nitrogen direct injection system and the low-temperature foaming system, respectively, liquid nitrogen is directly injected into a foam liquid, to prepare a low-temperature foam type fire preventing and extinguishing material by means of forced convection, membrane boiling, explosion boiling and nucleate boiling between the liquid nitrogen and water.

Abstract: A battery cell, a method and system for manufacturing the battery cell, a battery, and a power consuming device are disclosed. The battery cell includes: a shell including an electrode draw-out portion; and an electrode assembly accommodated in the shell. The end of the electrode assembly facing toward the electrode draw-out portion is provided with a first tab, the first tab is wound around a winding axis of the electrode assembly and includes a plurality of turns of tab layers, and at least some of the plurality of turns of tab layers are welded to form a first welded portion. Some of the plurality of turns of tab layers are welded to the electrode draw-out portion to form a second welded portion; and among the tab layers connected to the first welded portion, at least one turn of tab layer is not welded to the electrode draw-out portion.

Abstract: A domestic waste incineration fly ash treatment system is provided, suitable for clean and efficient treatment of municipal solid waste incineration fly ash, and includes a three-stage water washing subsystem, a filtrate post-treatment subsystem, an MVR evaporation salt production subsystem, a pressure filtration subsystem, and a filter cake post-treatment subsystem.

Abstract: The present disclosure provides methods, reagents, compositions, systems and kits for high-throughput drug screening by using barcode molecules. In some embodiments, the method uses one step RT-PCR to simplify the experimental procedure and avoid RNA contamination in the experimental process.

Abstract: A battery cell, a battery, an electrical device, and a device and method for manufacturing a battery cell are described. The battery cell includes a shell, an electrode assembly, and a current collecting member, where the electrode assembly is accommodated in the shell, and the electrode assembly is provided with a tab; the current collecting member includes a first connecting part and a second connecting part which are connected, the first connecting part is used to be welded to the tab, and the second connecting part is used to be welded to the shell; and the first connecting part and the second connecting part are made of different materials, the first connecting part and the tab are made of the same material, and the second connecting part and the shell are made of the same material.

Abstract: High-performance optical-metasurface-based components configured to at frequencies of UV light and, in particular, in deep UV range and performing multiple optical-wavefront-shaping functions (among which there are high-numerical-aperture lensing, accelerating beam generation, and hologram projection). As a representative material for such components, hafnium oxide demands creation and establishment of a novel process of manufacture that is nevertheless based on general principles of Damascene lithography, to be compatible with existing technology and yet sufficient for producing high-aspect-ratio features that currently-used materials and processes simply do not deliver. The described invention opens a way towards low-form-factor, multifunctional ultraviolet nanophotonic platforms based on flat optical components and enabling diverse applications including lithography, imaging, spectroscopy, and quantum information processing.

Abstract: This application discloses a battery cell, a battery, an electrical device, and a method and equipment for manufacturing a battery cell. The battery cell includes a housing, an end cap, and an electrode terminal. An opening is made on the housing. The end cap covers the opening and is seamed to the housing. The electrode terminal is disposed on the end cap. A reinforcing portion is disposed on the end cap. A projection of the electrode terminal on the end cap does not overlap the reinforcing portion. The technical solution provided herein can solve a battery safety problem caused by an increased internal pressure during the use of the battery, and improve the lifespan of the battery.

Abstract: A chiral light-field optical imaging camera incorporating an array of photonic spin-multiplexed bifocal metalenses. Combined with a novel deep learning-based neural network reconstruction algorithm, the system provides distinct aberration-free photographic capabilities, including the ability to achieve a polarization controllable extremely large depth-of-field optical imaging across a range of distances within a range covering at least five orders of magnitude in absence of moving a part of the camera and based on a single exposure of an optical detector while maintaining high spatial lateral resolution.

Abstract: Provided include methods, compositions and kits for single cell target sequencing, including but not limited to, high-throughput detection of nucleic acid sequences of single cell T cell receptor, high-throughput detection of expressed viral sequences in host cells, detection of cancer druggable mutations (e.g., lung cancer druggable mutations) in single cells, and simultaneous detection of targeted regions and whole transcriptome in single cells.

Abstract: We provide a method to efficiently analyze coding RNA and non-coding RNA at single cell level in the present disclosure. A tag sequence is first added to the 3? of RNA molecules in a single cell, and the tag sequence is subsequently used to capture said RNA and prime reverse transcription of the RNA to cDNA. The resulting cDNA can be amplified and analyzed. The tag sequence can be combined with a cell barcode sequence to decode the identity of single cells, so that a plurality of single cells can be analyzed in parallel.

Abstract: A battery cell includes an electrode assembly, a housing, and an end cap. The electrode assembly includes a tab. The housing has an opening and includes a limit part, and is configured to accommodate the electrode assembly. The end cap includes a cap body and a convex part. The cap body is configured to cover the opening. In a thickness direction of the end cap, the cap body is located at one side of the limit part away from the electrode assembly. The limit part is configured to limit the cap body from moving relatively to the housing towards the electrode assembly. The convex part protrudes from an inner surface of the cap body towards the electrode assembly. The convex part is configured to go beyond the limit part away from the cap body, so that the convex part is pressed against the tab.

Abstract: An apparatus for light delivery to magneto-optical trap (MOT) system utilizes only planar optical diffraction devices including a planar-integrated-circuit PIC and a metasurface MS. When MOT is based on the use of a diffraction grating, a grating chip is additionally employed to launch and manipulate light for laser cooling. Bridging the gap between the sub-micrometer-scale guided mode on the PIC and the centimeter-scale beam needed for laser cooling, a magnification of the mode area by about 1010 is demonstrated using an on-chip extreme-mode-converter to launch a Gaussian mode into free space from a PIC-waveguide and a beam-shaping, polarization-dependent MS to form a diverging laser beam with a flat-top spatial profile, which efficiently illuminates the grating chip without loss of light.

Abstract: An index update method, including: receiving an index update request, where the index update request is used to instruct to create or delete a target index that is associated with a field in a logic table of a tenant; updating metadata information of the logic table in a database in response to the index update request; notifying a coordination service, where the coordination service is used to notify a second data access node to perform a local synchronization update; and after all second data access nodes finish local synchronization updates, performing a data asynchronization update. After the metadata information is updated in the database, an index is updated in two steps. In a first step, a local synchronization update is performed. In a second step, after all data access nodes finish local synchronization updates, a data asynchronization update is performed.

Abstract: An index update method, including: receiving an index update request, where the index update request is used to instruct to create or delete a target index that is associated with a field in a logic table of a tenant; updating metadata information of the logic table in a database in response to the index update request; notifying a coordination service, where the coordination service is used to notify a second data access node to perform a local synchronization update; and after all second data access nodes finish local synchronization updates, performing a data asynchronization update. After the metadata information is updated in the database, an index is updated in two steps. In a first step, a local synchronization update is performed. In a second step, after all data access nodes finish local synchronization updates, a data asynchronization update is performed.

Abstract: High-performance optical-metasurface-based platform configured with the use of Tantalum Pentoxide to operate with extremely low levels of loss at frequencies of UV light and, in particular, in mid- and near-UV ranges and performing multiple optical-wavefront-shaping functions (among which there are high-numerical-aperture lensing, accelerating beam generation, and hologram projection). Process of fabrication of such metasurface producing near-zero levels of optical loss and employing the otherwise standard etching methodologies. Embodiments facilitate the development of low-form-factor, multifunctional ultraviolet nanophotonic platforms based on flat optical components and enabling diverse applications including lithography, imaging, spectroscopy, and quantum information processing.

Abstract: High-performance optical-metasurface-based components configured to at frequencies of UV light and, in particular, in deep UV range and performing multiple optical-wavefront-shaping functions (among which there are high-numerical-aperture lensing, accelerating beam generation, and hologram projection). As a representative material for such components, hafnium oxide demands creation and establishment of a novel process of manufacture that is nevertheless based on general principles of Damascene lithography, to be compatible with existing technology and yet sufficient for producing high-aspect-ratio features that currently-used materials and processes simply do not deliver. The described invention opens a way towards low-form-factor, multifunctional ultraviolet nanophotonic platforms based on flat optical components and enabling diverse applications including lithography, imaging, spectroscopy, and quantum information processing.

Abstract: An index update method, including: receiving an index update request, where the index update request is used to instruct to create or delete a target index that is associated with a field in a logic table of a tenant; updating metadata information of the logic table in a database in response to the index update request; notifying a coordination service, where the coordination service is used to notify a second data access node to perform a local synchronization update; and after all second data access nodes finish local synchronization updates, performing a data asynchronization update. After the metadata information is updated in the database, an index is updated in two steps. In a first step, a local synchronization update is performed. In a second step, after all data access nodes finish local synchronization updates, a data asynchronization update is performed.

Abstract: A metasurface optical pulse shaper includes a metasurface with superpixels disposed on an entry side of the metasurface and a wire grid polarizer disposed on an exit surface of the metasurface for controlling a phase, amplitude, or polarization of an optical pulse, wherein the metasurface in combination with dispersers provide for optical shaping of the optical pulse. A process for optically changing a pulse shape includes dispersing a primary optical pulse; separating spatially, by frequency, primary frequency waves; changing, by superpixels, a relative phase of the primary frequency waves and producing phase waves that are separated spatially by frequency and phase; and producing a plurality of shaped frequency waves such that, from an individual phase wave, a shaped frequency wave is produced that separated spatially by frequency and phase, such that a superposition of shaped frequency waves produce a shaped optical pulse that has pulse shape that is different than the primary optical pulse.

Abstract: A query optimization method performed by a data access node includes: receiving a query request that is used to query tenant data; searching for a cached optimal query plan for the query request; if the optimal query plan is found, using the optimal query plan as a target query plan; or if no optimal query plan is found, generating a target query plan corresponding to the query request; and submitting the target query plan to a database, where the target query plan is used by the database to query the tenant data. Logical access (query request) is converted into a query plan (physical data access) by the data access node rather than a database node. In addition, the optimal query plan is used for query, so as to reduce a query cost as much as possible, and improve query performance.