Abstract: A metal powder preparation system and method are provided. The metal powder preparation system includes a medium frequency smelting furnace, a homogeneous insulated quantitative pouring furnace, a precision-controlled liquid level temperature pouring ladle, and a plurality of groups of atomization mechanisms connected in sequence. The present application improves the preparation quality of the metal powder, so that the parameters such as the powder particle size, sphericity, fluidity, oxygen content, component distribution, and particle size distribution of the metal powder can all meet the requirements of high-quality metal additive manufacturing, achieving efficient and continuous preparation of the metal powder at the same time.

Abstract: The present disclosure provides a document processing method and apparatus, and an electronic device. A specific implementation of the method comprises: receiving a triggering operation for a target document output by a target client, the target document comprising a first object and a second object, and the first object comprising a first content of a first component. In response to the triggering operation, rendering the first object by using a front-end control in the target client; and rendering the second object by using the target client, wherein the second object comprises a second content of a second component. The implementation achieves a partial same-layer rendering. Thus when the problem of mutual coverage between a native component and a webpage component is reduced, a decrease in the quality and efficiency of rendering is reduced, and the impact on some functions of the native components is also reduced.

Abstract: An electric double-rod grease gun is provided, which includes an oil storage tank, a plunger pump, and a driving device; the plunger pump includes a pump body that is provided with a first plunger chamber and a second plunger chamber, both the first plunger chamber and second plunger chamber are respectively provided with a first plunger rod and a second plunger rod; the driving device includes a driving motor, a reduction mechanism, a main transmission gear, a first secondary transmission gear, a second secondary transmission gear, a first eccentric shaft, a second eccentric shaft, a first connection rod, and a second connection rod. The first secondary transmission gear and the second secondary transmission gear are all meshed with the main transmission gear grease.

Abstract: A platform, system, and method for simulating critical rock collapse of surrounding rock in underground engineering includes: four vertically arranged reaction walls defining a square reaction space, and a base mounted at a lower end opening of the wall; and a row of horizontally arranged stress loading plates at a side of each wall close to the reaction space, and a reaction beam above this space, where the reaction beam, the stress loading plate, and the base define a loading space, and the loading space is configured for placement of a surrounding rock simulation block to be tested; the stress loading plate capable of moving horizontally in a direction of the reaction wall, and the reaction beam capable of moving in a vertical direction, so as to load the surrounding rock simulation block; and the stress loading plate and the reaction beam being driven by linear motion units for movement.

Abstract: A system and method for rock mass structure detection and dangerous rock detection including a rock mass structure automated detection device and a server. The rock mass structure automated detection device includes a three-dimensional laser scanning device and a two-dimensional image acquisition device for respectively acquiring three-dimensional laser point cloud data and a two-dimensional image of a tunnel construction region. The server communicates with the rock mass structure automated detection device and includes a block structure three-dimensional modeling module and a block structure geometric stability analysis module.

Abstract: A multimedia cloud service method, a communication cloud system and a computer readable storage medium are disclosed. The method may include, receiving, by the signaling cloud system, a media service request; controlling, according to the media service request, by the signaling cloud system, the media control entity to process the media service rule; and establishing, according to the media service rule, by the media control entity, a media data interaction path between the terminal device and the media exchange entity.

Abstract: The disclosure provides a Lorentz constraint angle estimation method and a system in a non-Gaussian environment; the method includes the following steps: constructing an N-time slot received signal model based on a non-Gaussian noise environment to obtain a reflected signal; constructing a cost model based on Lorentz norm by a difference value between an actual received signal and the reflected signal, and performing an angle estimation by combining with an atomic norm to obtain a signal sparse reconstruction model; constructing an augmented Lagrangian function by the signal sparse reconstruction model, and carrying out the iterative update on the augmented Lagrangian function to obtain a reconstructed signal; and analyzing the reconstructed signal and searching spectral peaks globally to obtain spatial spectral peak points, and completing an angle estimation of the reconstructed signal.

Abstract: A discrete element method contact model building method includes: selecting a filling body in a disaster-causing structure to obtain a change rule of cumulative loss of the filling body; performing test simulation, and determining a relation function of each group of corresponding mesoscopic mechanical parameters in each time period and mesoscopic parameters of a DEM contact model representing a change rule of macroscopical parameters of the filling body; embedding each mesoscopic parameter relation function into an existing particle contact model, performing test simulation, and updating a fracture failure criterion of the contact model according to a corresponding relation of macro-mesoscopic strength during model failure; and based on a seepage failure indoor test, building a seepage failure discrete element calculation model, and simulating the seepage failure process of a rock and soil mass by using the obtained particle contact model and the fracture criterion of the particle contact model.

Abstract: A volume measurement system and method for a closed water-filled karst cave, including a water collecting device, concentration tester and control system. The control system is connected to the water collecting device by a connecting piece. The water collecting device is a container with a top closed and bottom open. The water collecting device top is a piston. The piston is connected to a propulsion rod, and propulsion rod is controlled by control system to extend or retract, so as to realize the forward or backward movement of the piston. An openable and closeable placement table is hinged to the water collecting device's inner wall. The placement table is connected to piston, the placement table moves upward when piston is raised, and placement table moves downward when piston is lowered. The placement table is configured to accommodate a chemical substance. The concentration tester is configured to detect the solution's concentration.

Abstract: Provided are an interacting method and apparatus, an electronic device, and a storage medium. The method includes: in response to a triggering instruction in a first direction for first content on a page, displaying (110) the triggered first content and a triggered first triggering control; triggering (120) a first interacting operation on the first content based on a position of the first triggering control in a corresponding region of the first content. The interacting operation is simplified and the interacting efficiency is improved.

Abstract: An automatic detergent feeding device includes a liquid storage box, the liquid storage box is provided with a liquid outlet channel, the inside of the liquid outlet channel is provided with an opening and closing valve assembly for opening/closing the liquid outlet channel and an anti-backflow valve assembly for preventing an external liquid from flowing backwards into the liquid storage box, and the anti-backflow valve assembly is arranged at the upstream, corresponding to a liquid outlet direction, of the opening and closing valve assembly. The automatic detergent feeding device is provided with the anti-backflow valve assembly to prevent the external liquid from flowing backwards into the liquid storage box. Therefore, in case of failure of an extraction unit, the anti-backflow valve assembly will close the liquid outlet channel of the liquid storage box to prevent the external liquid from flowing backwards into the liquid storage box to cause water overflow.

Abstract: Fully automatic true triaxial tunnel and underground project model test system, including a triaxial loading device for loading model test piece, automatic data collection and analysis device, power system and control system; triaxial loading device includes test bench, vertical loading system, horizontal front and back, and left and right loading systems, and the vertical, horizontal front and back, and left and right loading systems apply three-way pressure to model test body; test bench functions for supporting, fixing, and providing counter-force; automatic data collection and analysis device includes micro optical fiber sensor embedded in model test piece, optical fiber monitoring system, micro pressure box and strain brick, and can collect multi-field information.

Abstract: Disclosed are inhibitors of mevalonate pathway as an efficient vaccine adjuvant and use thereof. In particular, the inhibitor is an acetoacetyl-CoA transferase inhibitor, a HMG-CoA synthase inhibitor, a HMG-CoA reductase inhibitor, a mevalonate kinase inhibitor, a phosphomevalonate kinase inhibitor, a mevalonate-5-pyrophosphate decarboxylase inhibitor, an isopentenyl pyrophosphate isomerase inhibitor, a farnesyl pyrophosphate synthase inhibitor, a geranylgeranyl pyrophosphate synthase inhibitor or a geranylgeranyl transferase (I, II) inhibitor. Also disclosed is an immunogenic composition comprising inhibitors of mevalonate pathway as an adjutant.

Abstract: A platform, system, and method for simulating critical rock collapse of surrounding rock in underground engineering includes: four vertically arranged reaction walls defining a square reaction space, and a base mounted at a lower end opening of the wall; and a row of horizontally arranged stress loading plates at a side of each wall close to the reaction space, and a reaction beam above this space, where the reaction beam, the stress loading plate, and the base define a loading space, and the loading space is configured for placement of a surrounding rock simulation block to be tested; the stress loading plate capable of moving horizontally in a direction of the reaction wall, and the reaction beam capable of moving in a vertical direction, so as to load the surrounding rock simulation block; and the stress loading plate and the reaction beam being driven by linear motion units for movement.

Abstract: A traffic accident processing method and apparatus, a device, a storage medium and a program product provided by the present disclosure include: receiving traffic accident information reported by a vehicle, where the traffic accident information is acquired when the vehicle determines that a traffic accident occurs according to sensor information; transmitting the traffic accident information to an accident processing terminal, where the accident processing terminal is configured to determine accident processing information according to the traffic accident information; and receiving the accident processing information transmitted by the accident processing terminal, and synchronizing the accident processing information with the vehicle and an insurance processing terminal.

Abstract: A method of adjusting a driving strategy for a driverless vehicle is provided, which relates to a field of artificial intelligence, in particular to autonomous driving, cloud computing, NLP, computer vision and other fields, and may be applied to an interaction scene between a driverless vehicle and a pedestrian. A specific implementation solution includes: detecting an emotion of at least one pedestrian in response to the at least one pedestrian being detected within a preset range in front of the driverless vehicle; and adjusting a current driving strategy for the driverless vehicle based on a specified emotion in response to detecting that the at least one pedestrian includes a target pedestrian exhibiting the specified emotion.

Abstract: A discrete element method contact model building method includes: selecting a filling body in a disaster-causing structure to obtain a change rule of cumulative loss of the filling body ; performing test simulation, and determining a relation function of each group of corresponding mesoscopic mechanical parameters in each time period and mesoscopic parameters of a DEM contact model representing a change rule of macroscopical parameters of the filling body; embedding each mesoscopic parameter relation function into an existing particle contact model, performing test simulation, and updating a fracture failure criterion of the contact model according to a corresponding relation of macro-mesoscopic strength during model failure; and based on a seepage failure indoor test, building a seepage failure discrete element calculation model, and simulating the seepage failure process of a rock and soil mass by using the obtained particle contact model and the fracture criterion of the particle contact model.