Abstract: Provided is a bridge cascade system, which includes at least one phase unit and a driving unit for the phase unit. The phase unit includes N bridge topologies cascaded on alternating current AC sides. The driving unit includes one driving power supply circuit, multiple bootstrap power supply circuits and 2N driving circuits. In the phase unit, the driving circuits are powered by the driving power supply circuit directly or through corresponding bootstrap power supply circuits. The driving circuits are configured to provide driving signals for corresponding switch transistors in the phase unit. In this way, one driving power supply is matched with multiple bootstrap power supply circuits, realizing power supply to the driving circuits corresponding to the switch transistors of all bridge topologies, which reduces the difficulty in designing the driving power supply for the bridge cascade system and reduces cost for the system.

Abstract: A flexible screen display device includes: a hollow housing having an opening; a receiving shaft fixed inside the housing; a first guiding shaft fixed inside the housing; a second guiding shaft fixed inside the housing; a flexible screen, one end of which is connected to the receiving shaft, and the other end of which sticks out of the opening via the first guiding shaft and the second guiding shaft to deploy or receive the flexible screen. The first guiding shaft is close to the receiving shaft with respect to the second guiding shaft, and the flexible screen forms a one-time guided bending section via the first guiding shaft and the second guiding shaft.

Abstract: The present disclosure provides a backlight module, a method for preparing the same, a driving method and a display device. The backlight module includes a backlight source and a light guide structure arranged on a light emitting surface of the backlight source; the backlight source includes a substrate and a plurality of light emitting units arranged on the substrate at intervals; the light guide structure includes a first medium layer and a second medium layer, the first medium layer includes a plurality of first medium structures corresponding to the plurality of light emitting units respectively, and an orthogonal projection of each light emitting unit on the substrate is located within an orthogonal projection of a corresponding first medium structure on the substrate; and the second medium layer includes a plurality of second medium structures, the plurality of second medium structures and the plurality of first medium structures are arranged alternately.

Abstract: A hyaluronic acid skin care composition includes a thiolated hyaluronic acid derivative; and a hyaluronic acid or salt of at least one molecular weight of thereof. The composition not only has multiple skin protection effects of the hyaluronic acid itself, but also has strong anti-oxidation ability, and can effectively scavenge reactive oxygen species for skin care.

Abstract: A supporting structure, including: a carrying plate configured to carry a foldable screen; a supporting assembly comprising two supporting members, each of which are rotatably connected to the carrying plate; a coupling shaft located between the two supporting member and disposed parallel to the carrying plate and rotation axes of the two supporting members; and a connecting assembly, comprising a first connecting piece and a second connecting piece, the first connecting piece rotatably connected to the first supporting member and the coupling shaft respectively, and the second connecting piece rotatably connected to the second supporting member and the coupling shaft respectively; wherein, in a case that the coupling shaft is at a first position, the supporting structure is in a storage state; and in a case that the coupling shaft is at a second position, the two supporting members are configured to support the carrying plate.

Abstract: A displaying device and a driving method thereof, wherein the displaying device includes a first display panel, a second display panel and a driving circuit; the first display panel includes a plurality of first pixel units that are able to display a color, wherein each of the first pixel units includes a plurality of sub-pixel units; and the second display panel is provided on a light exiting side of the first display panel, including a plurality of second pixel units; wherein a distribution density of the plurality of second pixel units is greater than a distribution density of the plurality of sub-pixel units.

Abstract: A photovoltaic system and a method for locating devices in a photovoltaic string. A communication host in the photovoltaic system acquires accumulated operation durations of MLPE apparatuses of the photovoltaic string, ranks the accumulated operation durations to obtain a ranking result, and determines a physical location of each device in the photovoltaic string according to the ranking result and a sequence of installing positions of the devices, where the devices are installed at the installing positions based on the sequence. It is not necessary to paste label codes on the MLPE apparatuses, or record serial numbers of the MLPE apparatuses by installation personnel. Operation processes are simplified, operation time is saved, and labor costs are reduced.

Abstract: A photovoltaic system, a method for locating devices in a photovoltaic string, a MLPE apparatus, and a method for ranking MLPE apparatuses. Each MLPE apparatus sends, actively according to a predetermine rule, an initial message to the other MLPE apparatuses. The initial message includes a serial number corresponding to said MLPE apparatus and an accumulated operation duration of said MLPE apparatus. The MLPE apparatuses determine the rank of the accumulated operation duration of each MLPE apparatus according to the initial messages sent from all MLPE apparatuses. After each MLPE apparatus communicates with a communication host, the MLPE apparatuses reports the rank of the accumulated operation duration of each MLPE apparatus to the communication host. Thereby, the communication host may determine a physical location of each device in the photovoltaic string according to the ranks of the accumulated operation durations and a sequence of installing positions of the devices in the photovoltaic string.

Abstract: A two-stage converter, a method for starting the two-stage converter, an LLC converter, and an application system are provided. A controller of the LLC converter of the two-stage converter first controls a main circuit of the LLC converter to perform hiccup charging on a direct current bus of a later-stage converter at a preset interval, so that the direct current bus voltage of the later-stage converter gradually increases, until an auxiliary power supply of the later-stage converter starts to operate, to supply power to the controller of the later-stage converter. After the controller of the later-stage converter reports the detected direct current bus voltage, the controller of the LLC converter determines whether the output voltage of the LLC converter increases to a hiccup starting voltage. If so, the controller of the LLC converter controls the main circuit to operate in a hiccup voltage stabilization phase.

Abstract: A photovoltaic inverter, a photovoltaic system, and a method for controlling discharging are provided. The photovoltaic inverter includes a first DCDC converter, an inverter circuit, a first discharging circuit, and a controller. A port capacitor is connected between a positive input end and a negative input end of the first DCDC converter. The port capacitor includes an X capacitor and a first group of Y capacitors. The first discharging circuit is connected between a common terminal of the first group of Y capacitors and a direct current bus, where the common terminal of the first group of Y capacitors is grounded. The controller is configured to control, when receiving a rapid shutdown instruction, the first discharging circuit to operate. The first discharging circuit is configured to discharge electrical energy of the port capacitor.

Abstract: A computer-implemented method and system for determining a path arrangement of an infrastructure link. The method includes receiving one or more inputs each indicative of a constraint; and processing the one or more inputs and a set of data based on a path arrangement determination model. The set of data includes data representing one or more factors affecting the path arrangement. The method also includes determining, based on the processing, the path arrangement of the infrastructure link.

Abstract: The present disclosure discloses a backlight module and a display apparatus. A microprism film layer is further arranged on a light emitting side of a light guide plate, and the microprism film layer is located in a range of a preset distance by which the light guide plate extends from a side close to a light source to a side away from the light source; and the microprism film layer includes a plurality of first microprism structures, and the first microprism structures are configured to make an incident angle of light at a first interface when entering the first microprism structures greater than an emitting angle of the light at the first interface when exiting from the first microprism structures when the light in the light guide plate enters the first microprism structures from the light guide plate and then enters the light guide plate from the first microprism structures.

Abstract: A privacy film includes a first conductive layer; an emitting angle limiting spacer layer on the first conductive layer; a second conductive layer on a side of the emitting angle limiting spacer layer away from the first conductive layer; and a plurality of light diffuser particles in a space between the first conductive layer and the second conductive layer. The emitting angle limiting spacer layer includes a plurality of spacers defining a plurality of light emitting regions, The second conductive layer is spaced apart from the first conductive layer by a first distance. A maximum height of the plurality of spacers relative to a surface of the first conductive layer facing the second conductive layer is less than the first distance. The second conductive layer is spaced apart from a surface of a respective one of the plurality of spacers facing the second conductive layer by a second distance.

Abstract: The present teaching relates to request management and data recovery in a data system. In one example, a failure in connection with first data is detected at a first node in a data system. Information associated with a most recent transaction related to the first node is obtained from the persistent storage. Each of other nodes in the data system is requested to transmit one or more transaction requests previously sent to the first node after the most recent transaction. The one or more transaction requests are received from at least one of the other nodes. A sequence of one or more transactions associated with the one or more transaction requests is determined. The one or more transactions are executed according to the sequence in order to recover the first data at the first node.

Abstract: A computer-implemented method and a related system for determining seismic hazard related data. The method includes processing geological/seismological data associated with an area of unknown hazard using a simulation model, and determining simulated ground motion intensity data associated with the area of unknown hazard. The simulation model is determined based on geological/seismological data associated with an area of known hazard and ground motion intensity data associated with the area of known hazard. Alternatively, or additionally, the method includes processing simulated ground motion intensity data associated with the area of unknown hazard with another simulation model.

Abstract: A computer-implemented method and system for determining a path arrangement of an infrastructure link. The method includes receiving one or more inputs each indicative of a constraint; and processing the one or more inputs and a set of data based on a path arrangement determination model. The set of data includes data representing one or more factors affecting the path arrangement. The method also includes determining, based on the processing, the path arrangement of the infrastructure link.

Abstract: Embodiments of the present disclosure disclose a method, an apparatus, a server, and a storage medium for recalling for a search. The method for recalling for a search includes: acquiring a search term inputted by a user; calculating a semantic vector of the search term using a pre-trained neural network model; and recalling, according to a pre-established index, target documents related to the semantic vector of the search term from candidate documents, the index being established based on the semantic vectors of the candidate documents, and the semantic vectors of the candidate documents being calculated using the pre-trained neural network model. The embodiments of the present disclosure may solve a problem in the existing method for recalling that the recalling accuracy is affected by failing to generalize semantics, to improve the accuracy of recalling for a search.

Abstract: A fast processing method of massive time-series data based on aggregated edges and time-series aggregated edges implements fast and real-time processing based on an association of a graph data structure under a massive data pattern. In terms of incremental flow calculation based on time windows, the present disclosure proposes an innovative data structure of “aggregated edge” and “time-series aggregated edge”, which is suitable for data modeling of real-time dynamic graph. The present disclosure introduces a time-series graph query language, which adds descriptive semantics of time series information, and not only supports basic queries based on vertices, edges, and attributes, but also can implement users' graph queries for index calculation results in a time window. The graph query includes graph matching and graph filtering. The present disclosure is especially suitable for fields such as marketing and real-time risk control based on massive data mining and has good timeliness control and high scalability.

Abstract: An atomizing core is configured to be electrically connected to a battery of an electronic atomizing device, the electronic atomizing device defines an air suction channel, the electronic atomizing device includes a mouthpiece at an end of the air suction channel. The atomizing core includes a base and a heater. The base is configured to store liquid and has an atomizing surface located in the air suction channel, wherein the atomizing surface is arranged to face away from the battery and towards the mouthpiece. The heater is arranged on the atomizing surface and configured to atomize the liquid.

Abstract: Disclosed are a display module, a display device and a viewing-angle switching method. The display module includes a backlight module, a display panel, a lower polarizer sheet, a viewing-angle switching element and a transparent cover plate; the viewing-angle switching element and the transparent cover plate are arranged between the display panel and the lower polarizer sheet, and the transparent cover plate is arranged on a side of the viewing-angle switching element that is close to the lower polarizer sheet; the backlight module is configured to supply light that meets a preset condition, the viewing-angle switching element is configured to switch viewing-angle modes of the display module; the viewing-angle modes include; a first viewing-angle mode and a second viewing-angle mode; and a viewing-angle range of the first viewing-angle mode is smaller than a viewing angle range of the second viewing-angle mode.