Abstract: The present application discloses a method for delineating exploration reserved areas of deep-sea polymetallic sulfide resources, which is suitable for delineating the exploration reserved area for further exploration by delineation and evaluation of the prospect area after prospecting and investigation of seabed sulfide. The method comprises the following: a stage of extracting prospecting indicators; a stage of evaluating metallogenic prospect areas; and, a stage of delineation of the exploration reserved areas. The present application can be applied to the evaluation and prediction of deep-sea polymetallic sulfide resources, in particular to the delineation of exploration reserved areas for deep-sea polymetallic sulfide resources.

Abstract: A method for locating a high-impedance ground fault of a smart distribution network with topology change adaptation includes: acquiring a fault traveling wave sample within a specified time window after a fault occurs, and performing continuous wavelet transform on the fault traveling wave sample to obtain traveling wave full waveform feature information; establishing a graph structure of a power distribution network, obtaining a corresponding adjacency matrix, and obtaining node position and structure encoding information in the graph structure through graph random walk and graph Laplace transform; concatenating the node position, the structure encoding information and the traveling wave full waveform feature information to obtain a node feature, and inputting the node feature and an edge feature into the graph structure to establish a graph sample data set; constructing and training a Graph Transformer model; and calling the trained Graph Transformer model to locate a fault in to-be-detected sample data.

Abstract: The invention discloses method and apparatus for operation and maintenance of a battery and an electronic device. The method includes: performing a charging/discharging process on a to-be-analyzed battery cluster, and determining key battery parameters (KBP) of a plurality of cells in the battery cluster; determining whether the battery cluster is abnormal depending on whether the KBPs of the cells in the battery cluster exceed a normal range; and performing operation and maintenance on the battery cluster in a case that the battery cluster is abnormal. The internal resistance, the capacity parameter, and the self-discharge parameter of the cells are used as the KBPs of the cells. Based on the KBPs, whether the cells are abnormal can be determined more accurately, and the cause of the abnormality can be determined. Accordingly, more accurate operation and maintenance can be subsequently realized for the battery cluster when required.

Abstract: A gesture recognition method and a related apparatus are provided, to obtain a first point cloud data set by filtering an original point cloud data set collected by a radar apparatus. The first point cloud data set includes a plurality of frames of first point cloud subsets, the first point cloud subset includes a first cluster center, the first cluster center is a cluster center of a plurality of pieces of point cloud data in the first point cloud subset, a maximum horizontal distance between any two first cluster centers meets a first preset condition, and duration of the first point cloud data set meets the first preset condition. Point cloud data whose motion track does not match gesture motion can be effectively filtered out. Gesture recognition is performed by using the first point cloud data set obtained by filtering.

Abstract: A battery-powered outdoor power equipment includes a battery, a first electric motor configured to operate at a first power level and a second power level, a runtime module having a display and a first control button, and a controller in communication with the battery, the electric motor, and the display. The controller being configured to communicate a remaining runtime of the battery to the display based on a charge level of the battery, and update the remaining runtime in response to an input to the first control button that changes the first electric motor from the first power level to the second power level.

Abstract: Provided is a method of controlling vibration in an artificial satellite vibration test by using a controller and a plurality of shakers installed on an artificial satellite and configured to vibrate at a predetermined frequency. The method includes: performing a pre-test operation in which the controller sets the artificial satellite as a system and calculates a plurality of input values using a frequency response function of the system and an inverse matrix of the frequency response function; determining, by the controller, whether errors, which are differences between target values and a plurality of output values resulting from the plurality of input values, are within a first range; and performing, by the controller depending on results of the determination, single shaker control using one of the plurality of shakers, or multiple shaker control using the plurality of shakers.

Abstract: A ballistocardiography device comprises: a support for a person, a plurality of pressure or acceleration sensors each providing an analogue signal representative of a pressure or an acceleration measured at a point on the support or on the body of the person, a multiplexer (41) configured to receive a plurality of analogue signals from sensors and to output a signal successively representative of the input signals and an operational amplifier (52) having one input (57) connected to the output of the multiplexer and provided, on its other input, with a mixed filter comprising an analogue-to-digital converter (53) converting the signal coming out of the multiplexer into digital data, a digital filter (54) acting on the digital data and a digital-to-analogue converter (55) converting the filtered digital data into an analogue signal that is fed into the other input (58) of the operational amplifier.

Abstract: Tunnel defect detecting method and system using unmanned aerial vehicle (UAV) are provided, and the UAV is equipped with a light-emitting diode (LED) module, a camera, a laser radar, an ultrasonic distance meter and an inertial measurement unit (IMU). The method includes: collecting images in a tunnel based on the LED module and the camera to obtain a training image set; training by using the training image set to obtain a defect detecting model, collecting real-time tunnel images, detecting suspected defects to the real-time tunnel images by the defect detecting model, obtaining pose information of the UAV based on the camera, the laser radar, the ultrasonic distance meter and the IMU to control the UAV to hover. The method can realize accurate pose estimation and defect detection in the tunnel with no GPS signals and highly symmetrical inside.

Abstract: Disclosed are systems and methods for a sensor synchronization system. Sensors of an autonomous vehicle (AV) are synchronized to cause sampling of a first sensor of the sensors to occur in alignment with sampling of a second sensor of the sensors. A sampling time point for the first sensor is determined based on the synchronizing the sensors, the sampling time point comprising a time when the first sensor is in alignment with the second sensor. The sampling time point is provided to the first sensor. A controller circuit of the first sensor determines an offset of the first sensor to apply to a local system time of the first sensor to cause a data acquisition of the first sensor to occur at the sampling time point. The data acquisition is performed at the first sensor using the sampling time point and the offset.

Abstract: A charging control method for a battery pack at least including two batteries connected in parallel. The method includes determining, based on a charging parameter, states of charge (SOCs) corresponding respectively to the batteries at elapsing of a preset charging time, calculating, according to the SOCs, an amount of charge transfer between the batteries after stopping charging at the elapsing of the preset charging time, judging whether a charge-receiving battery is in a critical overcharge state according to the amount of charge transfer, and, in response to the charge-receiving battery being in the critical overcharge state, stopping charging the battery pack at the elapsing of the preset charging time.

Abstract: The present disclosure relates to a method for predicting soil hydraulic properties based on an upward infiltration experiment of a cutting ring soil sample. According to the new design approach, based on an inverse process of one-dimensional water upward infiltration analytical solution of homogeneous dry soils under a boundary condition of a constant pressure, by recording the data regarding cumulative infiltration amounts and infiltration times during the upward infiltration process of the cutting ring soil sample and a time for the wetting front to reach the upper surface of the cutting ring soil sample, a saturated hydraulic conductivity of the cutting ring soil sample is measured, and the soil hydraulic properties are quickly obtained.

Abstract: The present disclosure relates to a method. The method includes receiving, via one or more processors, colorimetric data corresponding to a portion or integrality of a surface of a field component. The method also includes determining, via the one or more processors, a color value associated with the surface. Further, the method includes retrieving, via the one or more processors, trend data indicating relationships between a plurality of color values and a plurality of conditions corresponding to the field component. Further still, the method includes determining, via the one or more processors, a condition of the plurality of conditions correspond to the field component based on the trend data and the color value. Even further, the method includes generating, via the one or more processors, a condition output based on the determined condition.

Abstract: A method to assess reservoir continuity between single wells in an oilfield formation within a region with several petroleum reservoirs, including the steps: collecting water samples from each of the single wells, obtaining the geochemical composition of each of the water samples, obtaining a dataset from the geochemical compositions of the single wells, analyzing the dataset using principal component analysis to obtain principal components of the dataset, clustering the principal components to obtain clusters, identifying hydrodynamic groups from the clusters, assigning the wells to hydrodynamic groups, wherein wells within one single hydrodynamic group are considered to be hydraulically communicated.

Abstract: A contained radiation power metering system for measuring power of a radiation source of an additive manufacturing machine includes a base configured to fit within the additive manufacturing machine, a radiation sensor connected to the base and configured to receive radiation from the radiation source and output a radiation power signal, and a wireless module disposed on the base configured to receive the radiation power signal and transmit the radiation power signal from the system to a separate wireless receiver.

Abstract: An autobrake system includes a brake control unit (BCU), and a control knob in electronic communication with the BCU. The BCU is configured to receive a position signal from the control knob, the position signal corresponding a position of the control knob. The BCU is configured to select a braking deceleration based upon the position signal, wherein the braking deceleration continuously changes between a minimum braking deceleration and a maximum deceleration in response to the control knob moving between a first position and a second position for fine tuning of the braking deceleration.

Abstract: A handheld pool game clock apparatus suited for timekeeping pool/billiard games is presented. The handheld pool game clock apparatus contains a clock body, at least one display, a processing unit, at least one switch, and a control panel. The at least one display is distributed around the clock body. The processing unit and the at least one switch are connected within the clock body. The control panel is connected adjacent to the clock body. The at least one display, the control panel, and the at least one switch are electronically connected to the processing unit.

Abstract: A computer device includes memory that stores a test plan for a coordinate measuring machine to perform an object measurement. The test plan includes at least one test feature for a plurality of reference elements of the object. The computer device includes at least one processor configured to execute instructions stored in the memory. The instructions include, for each of the reference elements, obtaining at least one accuracy variable. The accuracy variable specifies an accuracy of the measurement result of a respective reference element. The instructions include ascertaining an error effect of each reference element on the quantification of the test feature based on the respective accuracy variable. The instructions include ascertaining for each of the error effects whether it meets an error criterion and, if so, classifying a reference element assigned to this error effect as a critical reference element.

Abstract: A coupling unit is disclosed for detachable coupling two pars of a spacecraft, the coupling unit connecting the two parts of the spacecraft in a connected condition and the coupling unit distancing the two parts of the spacecraft, when the coupling unit is in detached condition. The coupling unit comprises a first element and a second element engaged to each other in connected condition, with the second element comprising a gas generator for generating gas under pressure to detach the first and the second element to bring them in the detached position, thereby distancing the first element and the second element from each other, and thus also the first part and the second part connected to the respective elements.

Abstract: A method for detecting the occurrence of an event at a well comprising: recording a first set of measurements collected from the well; processing the recorded measurements to provide a first set of data; calculating a first score based on the first set of processed data; recording a second set of measurements collected from the well; processing the second set of recorded measurements to provide a second set of data; calculating a second score based on the second set of processed data; wherein the first set of processed data and the second set of processed data is the number median of absolute difference from normal; combining the first score and the second score using a weighted average; and comparing the combined scores to a predetermined rule based on a specified time frame; and allowing an operator to adjust parameters of the well operation based on the score comparison.

Abstract: A system includes a processor operatively coupled to memory. The processor performs operations that include obtaining electrical measurements of a power system. The processor determines a scaled energy value of a first set of the electrical measurements that are scaled with respect to a second set of electrical measurements. The processor determines that a potential ringdown event occurred by comparing the scaled energy value to a threshold energy value. The processor determines that the potential ringdown event is a confirmed ringdown event by comparing a scaled error value to a threshold error value. The processor generates one or more mode estimates from the confirmed ringdown event.