Abstract: The present disclosure provides a power converter including a transformer, a first current detection circuit and a rectifier circuit. The transformer includes a primary side winding and a secondary side winding coupled to each other. The first current detection circuit is electrically connected in parallel to the secondary side winding and includes a first auxiliary winding, a first switch and a first impedance device electrically connected in series. The first auxiliary winding is coupled to the secondary side winding. The rectifier circuit includes a first bridge arm and a second bridge arm electrically connected in parallel. The first bridge arm includes a second switch and a third switch electrically connected in series, and the second bridge arm includes a fourth switch and a fifth switch electrically connected in series.

Abstract: Techniques for generating predicted driving scenarios based on relevancy data are described herein. A vehicle may detect an object and generate predicted object trajectories and probabilities associated therewith. The vehicle may determine a relevance score that indicates a level of relevance of each object trajectory with respect to the vehicle. The vehicle may use the object trajectory probabilities and relevance scores to generate predicted driving scenarios and/or probabilities associated therewith. The vehicle may use the predicted driving scenario when determining a control trajectory for the vehicle to follow. That is, the vehicle may determine cost values that represent the cost of following a specific candidate action. The vehicle may weight some or all of the cost values by a fraction of the object trajectory probability and the predicted scenario probability. Based on the weighted cost values, the vehicle can determine one or more of the candidate actions to follow.

Abstract: Techniques for controlling a vehicle based on predicted driving scenarios are described herein. A vehicle may generate candidate actions for the vehicle to follow. Further, the vehicle may receive a predicted driving scenario that includes an object trajectory probability and a predicted scenario probability. The vehicle may analyze the candidate actions by determining costs of the candidate actions based on the predicted scenario. The vehicle may scale some or all of the cost values by a ratio of the object trajectory probability and the predicted scenario probability. Based on the weighted cost values, the vehicle can determine one or more of the candidate actions to follow.

Abstract: The present application discloses a virtual column construction method based on data lake and a data query method. The present disclosure includes: first, automatically performing expression statistical analysis on a large quantity of statements to be analyzed in a data lake, so as to obtain an expression to be used; next, automatically constructing a virtual column construction request corresponding to the expression to be used, according to virtual column construction description information corresponding to the expression to be used, so that the virtual column construction request is used to request construction of a virtual column that can represent the expression to be used; then, according to the virtual column construction request, constructing a virtual column corresponding to the expression to be used, to enable the virtual column to represent the expression to be used.

Abstract: A method for controlling a welding apparatus, including the following steps: an acquisition step of acquiring an image of a groove of a weld seam to obtain a groove image; a first determination step of extracting a laser line; a processing step of at least fitting the laser line to obtain a first function; a second determination step of determining a third function; a third determination step of determining a predicted position of a welding gun when the third function converges to be a gun alignment position of the welding gun, and performing welding; and repeatedly executing the first determination step, the processing step, the second determination step and the third determination step, until the welding of all weld passes of the weld seam is completed. Further provided are a welding controller, and a welding system for executing the control method.

Abstract: A method for screening cross-species horizontal gene transfer (HGT). The method comprises steps of constructing a background database, inferring orthologous groups, constructing a gene phylogenetic tree, gene tree-based HGT inference, validation of inferred candidate HGTs based on a gene tree, and assigning HGTs to a timeline. By integrating multi-step processes such as phylogenetic analysis, sequence alignment, functional annotation, and statistical validation, the method achieves high-throughput and automated screening of HGT events in a large-scale gene data set. The method of the present invention is particularly suitable for HGT research across biological kingdoms with ultra-long time scales and ultra-long evolutionary distances, and is capable of providing an important scientific tool for understanding gene flow and functional enhancement during biological evolutionary history.

Abstract: This application provides an interactive event processing method and apparatus. The method includes: obtaining a combination key event, where the combination key event is an interactive event used to trigger a zoom function; converting the combination key event into a zoom touch event; and zooming an interface in response to the zoom touch event.

Abstract: A vehicle trajectory may be determined by sampling sequences of vehicle controls based on a set of control distributions. The control distributions may then be updated based on a set of trajectory-related costs associated with the sampled trajectories. The sampled trajectories may be used to determine a trajectory for the vehicle. The determined trajectory may be used to control the vehicle and/or the vehicle's driving behavior.

Abstract: In accordance with an embodiment, a method includes detecting a target device and a tilting operation performed on the terminal device, wherein a distance between the target device and the terminal device is less than or equal to a target distance; and sharing content with the target device in response to the target device and the tilting operation being detected.

Abstract: In a human-computer interaction method, a second electronic device receives a first picture and identification information of at least one application that are sent by a first electronic device based on a first operation. The second electronic device displays the first picture and an icon of the at least one application. The second electronic device receives a second operation performed on a first icon, where the first icon is one icon in the icon of the at least one application. In response to the second operation, content of an application window of a first application displayed by the second electronic device is the same as that of an application window of the first application opened on a first interface.

Abstract: A structured query statement similarity detection method, a device and a medium are provided. The method includes: acquiring first and second structured query statements, and constructing corresponding first and second abstract syntax trees, a correlation degree between the root node in the abstract syntax tree and the query result of the statement being higher than a correlation degree between other nodes and the query result of the statement; traversing a node in the first abstract syntax tree, matching the traversed node with a node at a same level in the second abstract syntax tree, and obtaining a matching result of the node; and determining a statement similarity between the first structured query statement and the second structured query statement based on a matching result of a root node in the first abstract syntax tree, a matching result of a child node of the root node, and their corresponding weights.

Abstract: This specification relates to file format-based transparent encryption tailored for big data. In some aspects, a method includes receiving, by one or more computing devices, a write request including a table with one or more columns to be stored in a storage device, wherein each column includes a number of pages; generating a column key for each column and a page key for each page including sensitive information; encrypting (i) each page including sensitive information with a corresponding page key and (ii) each column with a corresponding column key; generating wrapped keys for the column keys and page keys and storing the wrapped keys into a key file; storing the encrypted columns into a data file of the storage device and storing the wrapped keys in a separate key file; and storing a reference to the key file in a file footer of the data file.

Abstract: A driving circuit includes a driver, a negative voltage generating circuit and a negative voltage control circuit. The driver receives a first control signal and generates a first driving signal. The negative voltage generating circuit includes a first terminal, a second terminal, a first resistor, a first capacitor and a second resistor. A first switching signal is output from the second terminal to control the operation of one part of a plurality of main switches. The negative voltage control circuit includes a diode and an auxiliary switch. When the first control signal is transitioned from a high level state to a low level state, the first switching signal is transitioned from a positive voltage to a negative voltage. Following the dead time, the first switching signal is transitioned from the negative voltage to a zero voltage.

Abstract: An interaction method and a terminal device. The terminal device receives a first location signal through a screen. An interface displayed on the screen includes an operation area and a display area, the operation area includes a first target area, and a page displayed in the display area includes a first target function. The terminal device determines, based on the first location signal, that a location of a touch point is in the first target area, and then the terminal device provides a first feedback used to introduce the first target function.

Abstract: A method for preparing concrete based on GGBS, silicon-aluminum compounds and CO2 waste gas includes: putting a certain quantity of GGBS, silicon-aluminum compounds and water into a ball milling tank; introducing CO2 waste gas into the tank, and stopping the introduction when gas pressure in the tank reaches a standard; and starting the ball milling tank, and repeating the gas charging and ball milling for multiple times until a median size reaches the standard and CO2 is completely reacted and adsorbed by the GGBS, and finally preparing concrete from a GGBS mixture meeting requirements. According to the method, by adding the silicon-aluminum compounds into the GGBS, and under a mechanical action of the ball milling machine, the GGBS is promoted to react with and adsorb CO2.

Abstract: Technologies directed to ambient temperature and relative humidity sensing using ultrasound signals are described. One device can emit an ultrasound signal using a speaker and measure the ultrasound signal using a microphone. The device can determine, using the ultrasound signal, a signal component corresponding to a direct propagation path (DPP) between the speaker and the microphone. The device determines, using the signal component, a first sound propagation property representing a speed of the ultrasound signal along the DPP. The device determines, using the signal component across different frequency bands, second sound propagation properties, each representing a sound attenuation of the ultrasound signal along the DPP in the respective frequency band. The device determines an ambient temperature value and a relative humidity value using a regression model based on the first sound propagation property and the second sound propagation properties.

Abstract: A vehicle control system a plurality of neural networks that are used to calculate a plurality of wheel slip estimates for a plurality of wheels based on wheel speed measurements for each wheel and outputs from other sensors of the vehicle, such as an IMU or GNSS receiver. Separate neural networks estimate wheel slip for each wheel. Wheel slip estimates may be used to select wheel speed measurements that are used to update a Kalman filter. The Kalman filter further updates its state according GNSS measurements that are not rejected according to a rejection algorithm that includes shape matching with respect to a trajectory estimated by the Kalman filter.

Abstract: The present disclosure discloses a lakehouse metadata change determination method, an electronic device, and a computer-readable medium. The method includes: for a metadata storage system, after receiving a metadata processing request sent by a data engine and used for requesting to perform update processing on a target object, executing object update processing logic corresponding to the metadata processing request, and after it is determined that the object update processing logic is completed, generating an update description message corresponding to the target object according to a comparison result between the target object before updating and the target object after updating, so that the update description message indicates that the update processing on the target object has been performed, and the update description message can be subsequently sent to a message receiving object.

Abstract: A light string includes a wire portion and a plurality of lamp interfaces sequentially and electrically connected in series with the wire portion, the light string further includes light-emitting portions pluggably connected with the lamp interfaces. The light-emitting portion comprises a light-emitting element, a lampshade located outside the light-emitting element, and a plug-in connector connected with the lampshade, wherein the plug-in connector is provided with a first conductive member and a second conductive member, the first conductive member and the second conductive member being capable of electrically connecting the light-emitting element with the wire portion when the plug-in connector is inserted into the lamp interface. By adopting a plug-in connection method between the light-emitting portion and the lamp interface, the present disclosure facilitates replacement for users, greatly reduces the use cost, and avoids waste of the light string.

Abstract: The present application discloses an access limiting method for a metadata server, an apparatus and a device, wherein the method is applied to a data lake metadata server, receives a metadata access request sent by a client, wherein the request is used for obtaining metadata stored by a storage server for describing target data, and the target data is data in a target table. The metadata service interface used by the data lake metadata server is determined according to the metadata access request. When the metadata service interface satisfies the preset condition, determining the number of applied tokens corresponding to the metadata access request according to the number of table partitions and the number of partition levels of the obtained target table.