Abstract: This disclosure discloses a coarse registration method based on an RANSAC principle and salient structures and a point cloud-model fine registration method considering multiple types of information for large-scale measured point sets generated from large components of ship hull segments. Fast and efficient coarse registration and fine registration methods are given. Point cloud registration based on deep learning methods can fully consider a wide range of information such as process constraints, inherent information of measured point clouds, and local semantic information of the point clouds, greatly improving intelligence and rationality of registration processes, at the same time, improving engineering guidance of registration results, achieving rapid error evaluation of processed components, and providing a basis for formulation of assembly parameters.

Abstract: A system for testing fatigue performance of material in low-temperature liquid hydrogen environment, which relates to the technical field of mechanical property test platforms, includes a jacket cover. A hydrogen sensor is provided at the top of and within the jacket cover; a rack, a liquid hydrogen tank and a liquid nitrogen tank are provided in the jacket cover; a loading mechanism and a liquid hydrogen containing mechanism are provided on the rack, the loading mechanism is connected to the rack, and the bottom of the loading mechanism extends into the liquid hydrogen containing mechanism; the liquid hydrogen tank and the liquid nitrogen tank both communicate with the liquid hydrogen containing mechanism; and the loading mechanism is configured for providing tension or pressure to a sample. The liquid hydrogen containing mechanism is provided with a cooling channel located around a sealing gasket, the cooling channel communicates with a thermostat.

Abstract: A multi-process parameter optimization method for low-pressure casting of aluminum alloy wheel hubs is disclosed, relating to the technical field of low-pressure casting of automobile wheel hubs. The method includes: building a three-dimensional model of an aluminum alloy wheel hub; setting initial production process parameters; numerically simulating a low-pressure casting process; analyzing temperature distribution in key points of a mold; adjusting the production process parameters based on temperature distribution; repeating the above steps to further optimize the production process parameters and obtain an optimal combination of process parameters; collecting and analyzing actual production data and building a model; and optimizing the process parameters by using a dynamic multi-objective particle swarm.

Abstract: Provided is a method for evaluating the stability of the cooling effect of a cooling system for low-pressure casting of an aluminum alloy wheel hub, relating to the technical field of low-pressure casting of automobile wheel hubs. The method includes: selecting a mold object; arranging a thermocouple, and acquiring temperature data; changing an initial temperature at a temperature measuring point of the thermocouple, and further acquiring real-time temperature data; extracting characteristic temperature data, and performing linear regression between an initial temperature value and a characteristic temperature value; and performing temperature data fluctuation analysis, and quantitatively measuring the stability of the cooling effect of the cooling system by using a maximum value and a minimum value of deviation of discrete points from a fitting curve as indexes.

Abstract: The present disclosure discloses a method for switching an execution environment and a related device thereof, to effectively prevent a hacker from maliciously accessing a TEE through ATF. The method in the present disclosure includes: After writing a first virtual address into a return address register of the TEE, the ATF determines whether the first virtual address is within a valid address range, and switches to the TEE based on the first virtual address only when determining that the first virtual address is within the valid address range.

Abstract: The present disclosure provides an intelligent temperature control method for a casting system, including: obtaining feature regions of a casting mold and arranging thermocouples in the feature regions of the mold based on structural characteristics of castings; building a random forest model and performing recursive feature elimination based on temperature measurement results of the thermocouples and casting quality inspection results, to determine a correlation between temperature measurement data of each thermocouple and casting quality, thereby optimizing a quantity of the thermocouples and screening the thermocouples; and analyzing temperature data of screened thermocouple temperature measurement points, cooling process parameters, and corresponding casting quality, constructing a relation among the cooling process parameters, an initial temperature of each thermocouple in the mold, and the casting quality through a gradient boosting decision tree model, and controlling the temperature of the casting sys

Abstract: The disclosure belongs to the field of preparation of radioisotopes for medical uses and relates to a method for extracting lead-212 and bismuth-212 from a thorium-232 decay chain, including: passing a solution containing thorium-232 decay chain substance through an anion exchange resin column, the solution containing thorium-232 decay chain substance containing halogen ions, and a concentration of hydrogen ions in the solution containing thorium-232 decay chain substance being more than 0.01 mol/L, lead-212 and bismuth-212 being adsorbed by the anion exchange resin column and other nuclides passing through the anion exchange resin column without being adsorbed; and introducing eluting agents to desorb lead-212 and bismuth-212 from the anion exchange resin column, so as to obtain lead-212 and bismuth-212 by separation and extraction. The disclosure can simultaneously extract lead-212 and bismuth-212 with a high extraction speed and high purity, and is not easy to cause organic pollution of products.

Abstract: A tool for replacing a bushing and seal of an inlet ball valve disc pivot and a method thereof, relating to the technical field of installation and maintenance of hydropower station equipment. The tool for replacing the bushing and seal of the inlet ball valve disc pivot comprises a support frame, a driving ring, a support shaft, a first support assembly and a second support assembly; the support frame includes a first ring, a second ring provided in parallel, and a plurality of connecting rods connected between the first ring and the second ring; the first ring is used for connecting to the ball valve body; the driving ring is provided between the first ring and the second ring in an adjustable position; the driving ring is used for detachable connection with the bushing; the support shaft is used for coaxial connection with the pivot.

Abstract: A lidar and a lidar adjustment method are provided. The lidar includes at least one transceiver component. The at least one transceiver component includes an emitting assembly, a beam splitting assembly, and a receiving assembly. The emitting assembly is configured to emit an outgoing light signal. The outgoing light signal is emitted, through the beam splitting assembly, towards a detection region and reflected by a target object to form a reflected light signal. The receiving assembly is configured to receive the reflected light signal after being deflected by the beam splitting assembly.

Abstract: A block generation method and apparatus for blockchain networks. The method includes that when a first blockchain node is a leader, the first blockchain node packs a leader-elected transaction in a transaction pool into a first block, where the leader-elected transaction records a leader proof of the first blockchain node. The leader proof records a voting state in which each of the plurality of second blockchain nodes votes on the first blockchain node, and the voting state indicates whether a vote is a positive vote or a negative vote. The first blockchain node sends the first block to the plurality of second blockchain nodes, so that the first blockchain node and/or the second blockchain nodes perform fork processing based on the leader proof.

Abstract: A program running method and a device are described for improving efficiency of running an application. The method includes obtaining a dynamic image of an application, where the dynamic image includes a trampoline function pointer segment, the trampoline function pointer segment includes at least one trampoline function pointer, the at least one trampoline function pointer corresponds to at least one interface, and the at least one interface includes an interface of a kernel or an interface of a common code library The method also includes calling the interface of the kernel or the interface of the common code library based on the trampoline function pointer segment, to run the application.

Abstract: A construction method and use of a Thy1-SNCA;Clu gene knockout mouse model are provided. The construction method includes: subjecting a Thy1-SNCA mouse to crossing with a Clu-KO mouse to obtain an F1 generation, and then conducting identification to obtain a Thy1-SNCA;Clu?/+ mouse; and subjecting the Thy1-SNCA;Clu?/+ mouse to backcrossing with the Clu-KO mouse to obtain an F2 generation, and then conducting identification to obtain a mouse with a target genotype, recorded as a Thy1-SNCA;Clu?/? mouse. The Thy1-SNCA;Clu?/? mouse can effectively shorten a time point for the onset of Parkinson's disease (PD)-like movement disorders, thereby shortening an experimental period. The mouse can provide more model mouse options for PD research.

Abstract: A lidar and a lidar adjustment method are provided. The lidar includes at least one transceiver component. The at least one transceiver component includes an emitting assembly, a beam splitting assembly, and a receiving assembly. The emitting assembly is configured to emit an outgoing light signal. The outgoing light signal is emitted, through the beam splitting assembly, towards a detection region and reflected by a target object to form a reflected light signal. The receiving assembly is configured to receive the reflected light signal after being deflected by the beam splitting assembly.

Abstract: An apparatus and methods for determining features in an image of a Hematoxylin and Eosin (H&E) stained tissue sample. An apparatus can be configured to apply a machine learning model to the H&E stained tissue sample image to determine features in the image.

Abstract: The system includes a track lining apparatus and two tamping apparatuses arranged in parallel, wherein the track lining apparatus includes two track lining hydro-cylinders, and the track lining hydro-cylinder communicates with a hydraulic control system through an oil inlet pipeline and an oil return pipeline; pressure sensors configured to detect pressures of the pipelines are provided on the oil inlet pipeline and the oil return pipeline; the tamping apparatus includes two pairs of tamping components arranged on both sides, where the tamping component includes a pair of packer arms and two pairs of packers; a dynamic force sensor is provided at a joint between the packer arm and the packer, and the dynamic force sensor can detect a transient dynamic downward insertion force generated when the packer is inserted into the ballast bed.

Abstract: The invention discloses a point cloud feature recognition and annotation algorithm based on improved PointNet ++. The algorithm includes a supervoxel growth method suitable for deep learning networks and a deep learning network suitable for dense scanning data. This method improves PointNet ++ and constructs a deep learning network suitable for large-scale point cloud recognition. While processing point clouds in each region, it considers the relationship between point clouds in each area, it solves the technical problem that the traditional PointNet series network cannot handle large-scale point clouds. A super-voxel growth method for voxelized point cloud calibration is proposed, which is suitable for determining the characteristic parameters in voxels with a strong resolution, easy calculation, and strong robustness, and realizes fast, efficient, and meaningful voxelized point cloud calibration.

Abstract: A method of providing fieldbus connectivity includes, by a network device for an industrial automation system: obtaining fieldbus connectivity requirements specifying a required fieldbus protocol type using which the network device is to communicate; loading, from a library, a fieldbus connectivity service, wherein the fieldbus connectivity service comprises fieldbus stack software and a fieldbus stack hardware configuration for implementing a protocol stack which conforms to the required fieldbus protocol type; using the fieldbus stack hardware configuration to carry out partial reconfiguration of a flexible fieldbus communications interface, wherein the flexible fieldbus communications interface comprises a portion which remains unaltered during the partial reconfiguration; binding the fieldbus stack software to a portion of the flexible fieldbus communications interface that was partially reconfigured using the fieldbus stack hardware configuration; and using the protocol stack which conforms to the requir

Abstract: A LiDAR includes a substrate, an installing base, an emission lens barrel, a receiving lens barrel, and a scanner. The substrate includes an emitter arranged on a surface of the substrate emitting a detection beam and a receiver arranged on the same surface for receiving an echo beam. The installing base includes a first optical channel and a second optical channel, isolated from each other. The first and second optical channels are configured to penetrate through a first end and a second end of the installing base. The detection beam and echo beam pass through the first and second channels, respectively. The first end is configured to fixedly connect to the substrate. The emission lens barrel is connected to the second end. The receiving lens barrel is connected to the second end. The scanner is configured to adjust directions of the detection beam and the echo beam.

Abstract: The present invention provides compounds of Formula (I) or (II), pharmaceutical compositions thereof, and methods of using compounds of Formula (I) or (II) to prevent and/or treat immune-related disorders.

Abstract: A method of manufacturing a master for use in a wafer-scale replication process is disclosed. The method comprises at least one step of forming a layer of photoresist on a substrate and exposing the layer of photoresist to a radiation pattern to form at least one patterned layer. The method also comprises a step of developing the at least one patterned layer to provide one or more structures defining the master. In an embodiment, the at least one step of forming the layer of photoresist comprises a process of dry film lamination.