Abstract: A coal and gas outburst monitoring device includes the insertion and anchoring assembly, and the pump drainage and monitoring mechanism; the insertion and anchoring assembly is vertically inserted and distributed on the sidewall of surrounding rock of coal mine roadway, and the insertion and anchoring assembly can monitor the stress change data in the sidewall of surrounding rock in real time; the pump drainage and monitoring mechanism is erected within the coal mine roadway, and the pump drainage and monitoring mechanism can cooperate with the insertion and anchoring assembly to perform the gas pump drainage monitoring for the sidewall of surrounding rock of goaf, and to obtain the gas seepage monitoring data in the surface layer and the inner layer of sidewall of surrounding rock. Thus, comparing with the database mechanism, the accurate and advanced predictions for the gas outburst can be made.

Abstract: An embodiment identifies, by a post-modeling category merging engine, a plurality of valid pairs associated with a categorical predictor, the plurality of valid pairs representing potential mergers of categories associated with a categorical predictor of a predictive model. The embodiment tests, by the post-modeling category merging engine, a merge strategy for the plurality of valid pairs to determine a merger that minimizes a loss in accuracy of the predictive model. The embodiment merges, by the post-modeling category merging engine based on the testing, a valid pair in the plurality of valid pairs to form a hybrid category.

Abstract: One example discloses a driver circuit, comprising: a first transistor (QTN) coupled to a first differential input (IN) and a power supply input (VCC); a second transistor (QTP) coupled to a second differential input (IP) and the power supply input; a third transistor (QBN) coupled to a first differential output (ON); a fourth transistor (QBP) coupled to a second differential output (OP); a first resistance (RP1) coupling the first transistor (QTN) to the third transistor (QBN); a second resistance (RP2) coupling the second transistor (QTP) to the fourth transistor (QBP); and a controller coupled to the power supply input; wherein the controller is configured to detect a ramp-down of a power supply coupled to the power supply input and in response disable a set of circuit elements in the driver circuit.

Abstract: A time series anomaly detection method, system, and computer program product that processes time series data includes absorbing profiles of the time series data and anomaly types of a model as features, optimizing biased ranks to create optimized ranks through merging initial ranks with new ranks generated by real anomalies, and auto-suggesting the optimized ranks for saving a predetermined amount of data operation.

Abstract: A method and a system for automatically collecting multiple information of a tunnel during construction period are provided. A detection point and a detection line are formed by projecting a light source on the inner wall of the tunnel, and then the pixel position changes of the areas where the detection point and the detection line are located in different time periods are recorded by a measuring camera, and the detection point and the detection line are integrated and corrected with tunnel point cloud data as a reference standard to form an accurate four-dimensional model of the tunnel.

Abstract: Provided are a cooking device, a control method and apparatus thereof, and a computer-readable storage medium. The cooking device includes an air frying module and a microwave module. The method includes: obtaining a characteristic parameter of a food material and a cooking stage of the cooking device; determining a cooking parameter of the cooking device based on the characteristic parameter of the food material; and controlling the air frying module or the microwave module based on the cooking stage and the cooking parameter to accelerate cooking of the food material.

Abstract: A method for providing information includes receiving a reference notification message that a target account number is referenced, the reference notification message being sent by a first information system after receiving a request initiated by a first user for first information content by way of referencing the target account number, wherein first information content includes information content generated in the first information system, and the target account number is associated with a second information system; acquiring the first information content; acquiring, from an information library associated with the second information system, second information content related to the first information content; and providing the second information content to the first user.

Abstract: The present disclosure relates to an article sorting apparatus and an article sorting system, wherein the article sorting apparatus includes: a first receiving means and a second receiving means which are both configured to receive an article, wherein the second receiving means is arranged below the first receiving means along a vertical direction; a transfer means arranged upstream of the second receiving means for transferring a received article to the second receiving means; and a sorting member for sorting the article to the first receiving means or the transfer means. The article sorting system includes an article sorting apparatus. The first receiving means and the second receiving means are arranged longitudinally along a vertical direction, which reduces the occupied space of the article sorting apparatus and allows for more space for article storage.

Abstract: A self-maintaining and anti-scouring device for an offshore wind power pile foundation is provided. The self-maintaining and anti-scouring device comprises: a plurality of fixing parts configured to be fixedly disposed on seabed; an installation part disposed above the plurality of fixing parts and configured for installing wind power equipment; and a sand-screening part, comprising a sand-screening ring and an impeller both of which are disposed below the installation part, wherein a seawater inlet, a stirring chamber and a sand outlet are disposed on the sand-screening ring in sequence from a top to a bottom of the sand-screening ring, and a seawater outlet is disposed on a side surface of the sand-screening ring to communicate to the stirring chamber, wherein the impeller is rotatably disposed in the stirring chamber. The impeller is horizontally rotated in the sand-screening ring to separate sand and seawater in the stirring chamber through a centrifugal force.

Abstract: A method, apparatus and system providing an open system architecture, referred to as X-centric architecture, that offers, supports or enables anything-as-a-service (XaaS) and can be centric to a variety of roles to support various operation scenarios. A service supported by the X-centric architecture is referred to as an XaaS service. Embodiments of the X-centric architecture involve a modular design which is extensible and adaptable. Embodiments provide or facilitate a new service module to be added dynamically to offer, support or enable XaaS services without the need to modify or redesign the system architecture.

Abstract: This application provides a photoelectric amplification circuit and a signal processing method. The photoelectric amplification circuit includes a first photodiode and a second photodiode that are connected in parallel. A Doherty circuit structure is used, so that power supply efficiency of the photodiode in a back-off state can be improved. In addition, an impedance modulation unit is used, to implement dynamic load conversion from a back-off point to a maximum output point. This helps maintain high output efficiency of the first photodiode and the second photodiode in an interval between the maximum power point and the back-off point.

Abstract: Methods, systems, and devices for validity mapping techniques are described. A memory device may use a change log to update a mapping that indicates whether data stored at respective physical addresses is valid. For example, the memory device may receive a command associated with data having a corresponding set of addresses (whether logical block addresses or physical addresses). The memory device may set an entry of the change log based on whether the set of addresses are consecutive. For example, the memory device may identify whether the set of addresses are consecutive and may set a flag in the entry of the change log to indicate whether the addresses are consecutive. Then, the memory device may update one or more entries of the mapping corresponding to the entry of the change log to indicate whether the addresses corresponding to the one or more entries of the mapping store valid data.

Abstract: Provided are a session message display method, an electronic device and a storage medium. The session message display method includes the following, a first session message input by a first user for at least one second user is received on a session page, and the first session message is sent to an instant messaging application client of each second user of the at least one second user; a message display content is generated in the message entry of a session list page of the first user according to at least one of a reading action or a reply action of the at least one second user on the first session message; where the message display content includes the first session message and message state information of the first session message, and the message entry is associated with the at least one second user.

Abstract: A method for shape-performance control by ultrasonic rolling combined with selective laser melting is provided, which includes following steps: S1, establishing a three-dimensional model of a component to be processed, and setting printing process parameters; S2, after nitrogen gas is filled into a forming cavity to reduce an oxygen content to a preset value, lowering a forming substrate and raising a powder substrate, laying powder from the powder substrate onto the forming substrate by a scraper, recovering excess powder, and after the laying is completed, melting the powder by a laser galvanometer to form a solid layer, and cycling for several times; S3, performing ultrasonic rolling on a surface of the solid layer; S4, cycling steps S2 and S3 until the component is formed, and ending the cycling; and S5, performing ultrasonic rolling on a surface of a formed component to obtain a solid component.

Abstract: A method includes obtaining, by a processing device, input data derived from a set of sensors of an autonomous vehicle (AV), generating, by the processing device using a set of lane detection classifier heads, at least one heatmap based on a fused bird's eye view (BEV) feature generated from the input data, obtaining, by the processing device, a set of polylines using the at least one heatmap, wherein each polyline of the set of polylines corresponds to a respective track of a first set of tracks for a first frame, and generating, by the processing device, a second set of tracks for a second frame after the first frame by using a statistical filter based on a set of extrapolated tracks for the second frame and a set of track measurements for the second frame, wherein each track measurement of the set of track measurements corresponds to a respective updated polyline obtained for the second frame.

Abstract: A system, method, and computer program product are configured to extract key value pair (KVP) data from one or more documents; obtain a content index for the one or more documents; and enhance the content index with the KVP data to provide a KVP content index.

Abstract: Provided are an encoding method and apparatus for an RAID6 disk array, a decoding method and apparatus for an RAID6 disk array, and a medium. The encoding method comprises: dividing all disks in a RAID6 disk array into two groups to obtain a first disk group and a second disk group; pairing all stripes of the RAID6 disk array to obtain several stripe pairs; and calculating two parity codes of each strip in the several stripe pairs according to a first rule and a second rule.

Abstract: Disclosed are a computer-implemented method, a system and a computer program product for model exploration. Model feature importance of each model of a plurality of models can be obtained, the plurality of models can be grouped into a plurality of model clusters based on the model feature importance of each model, and the model feature importance can be presented by box-plot or confidence interval.