Abstract: The application discloses a system and method for centrifugal intrusion of molten metal into porous media and then solidification positioning, including: test cups, used for placing test medium and molten metal intrusion; a rotor block, used for mounting the test cups, where one end of each test cup for placing the test medium is far away from the rotor block; a constant temperature oil bath preheating device, used for preheating the test cups and the rotor block; a centrifugal device, internally provided with the rotor block, used for performing a centrifugal operation on the test cups, where the test cups and the rotor block are installed inside the centrifugal device after being preheated; and an infrared heating and compression refrigerating device, arranged inside the centrifugal device, used for controlling a temperature of the test cups.

Abstract: Provided are a map data processing method and apparatus, and a storage medium, which relate to the field of data processing technology and, in particular, to artificial intelligence technology, for example, computer vision, map technology, and intelligent transportation. A specific implementation solution includes: processing landform coverage data according to a type of surface species coverage and a data processing rule associated with the type of surface species coverage to obtain a surface species coverage effect map; and generating a landform map according to the surface species coverage effect map and a reference map.

Abstract: Disclosed are a hydraulic fracturing and cutting cooperative device suitable for a hard rock and a use method thereof, belonging to the technical field of high-efficiency and rapid excavation of hard rock roadway (tunnel). The hydraulic fracturing and cutting cooperative device suitable for a hard rock provided by the disclosure includes a drill pipe, a pneumatic drilling system, a hydraulic fracturing system, a collaborative control system and a cutting head.

Abstract: A high-remanence neodymium-iron-boron magnet, and a preparation method and the use thereof are provided. The neodymium-iron-boron magnet has crystal grains with an R-T-B type compound as a main structure, and a grain boundary phase. By means of adjusting the proportional relation of elements such as B, Cu, Ga, RE and Ti, the neodymium-iron-boron magnet can achieve a relatively high main phase grain volume ratio and effectively restrain the proportion of a B-rich phase in the grain boundary phase, such that the magnet has relatively high Br, and also has both good Hcj and squareness performance.

Abstract: A high-coercivity Nd—Fe—B sintered magnet and a preparation method and use thereof are provided. The sintered magnet contains the following components in percentage by a mass: 100%: 26-37 wt % of R, R being at least one rare earth element including Nd; 0.07-0.23 wt % of Mn; 0.8-1 wt % of B; 0.5-4 wt % of M, M comprising Cu and/or Al, and at least one selected from Co, Ti, Ni, Zr and Ga; and the remaining being Fe. A Mn-containing auxiliary alloy powder is mixed with a Mn-free neodymium-iron-boron main alloy powder to prepare the Nd—Fe—B sintered magnet. The Mn-containing auxiliary alloy powder, also contains at least one of metals Cu and Al. Mn can replace a part of Fe in the main phase, so that the amount of solid solution of beneficial elements in grain boundaries in the main phase is reduced, and the coercivity is improved.

Abstract: Distributed security key management for protecting roaming data via a trusted platform module is performed by systems that include first and second processors, and first and second respective hardware security modules. The first security module encrypts a security key using a public key from the second security module, and the encrypted security key is provided to the second security module. A virtual machine (VM) executed by the first processor has a first virtual security module instance having state data that includes a storage key encrypting VM virtual disk data and that is encrypted with the security key. When a transfer condition is determined, the VM is transferred and executed by the second processor, using a second virtual security module instance, based on decrypting the security key by the second security module using a private key and decrypting the state data for the second virtual security module using the security key.

Abstract: Disclosed are a hydraulic fracturing and cutting cooperative device suitable for a hard rock and a use method thereof, belonging to the technical field of high-efficiency and rapid excavation of hard rock roadway (tunnel). The hydraulic fracturing and cutting cooperative device suitable for a hard rock provided by the disclosure includes a drill pipe, a pneumatic drilling system, a hydraulic fracturing system, a collaborative control system and a cutting head.

Abstract: A method for generating segmented images of a region of interest of a subject using magnetic resonance fingerprinting (MRF) includes receiving MRF data and a plurality of quantitative parameter maps generated using the MRF data, deriving a first set of image features based on the plurality of quantitative parameter maps and the MRF data, performing unsupervised clustering on each image feature in the first set of image features to generate a first set of clusters, determining a loss for each image feature and the associated cluster for the image feature, selecting a second set of image features based on the determined loss for each image feature, performing unsupervised clustering on the second set of image features to produce a second set of clusters, generating a non-background cluster with low probability voxels, and generating a segmented image based on the second set of clusters and the non-background cluster.

Abstract: A method for generating magnetic resonance (MR) images using a magnetic resonance imaging (MRI) system includes determining an optimized set of sequence parameters for a pulse sequence using an optimization framework comprising a systematic error index (SEI) configured to characterize errors, performing, using the MRI system, the pulse sequence comprising the optimized set of sequence parameters to acquire data from a subject, and generating at least one image of the subject using the acquired data.

Abstract: A method for reconstructing images using a self-calibrated subspace reconstruction includes receiving data acquired from a subject using a magnetic resonance imaging (MRI) system, generating aliasing-free low resolution images from at least a portion of the received data using temporally local low-rank matrix completion, estimating a temporally global subspace using the aliasing-free low resolution images, and generating aliasing-free high resolution images from the received data using temporally global subspace reconstruction that utilizes the estimated temporally global subspace. In some embodiments, a customized outlier detection algorithm can then be used to detect measurement errors in the aliasing-free high resolution images and to correct the aliasing-free high resolution images. Aliasing-free T1, T2, and ADC maps may be generated after comparing the corrected aliasing free high resolution images with a dictionary.

Abstract: The present disclosure provides a cemented filling material with bionic structure, a preparation method and an application thereof, and belongs to the field of structural modification methods of cemented filling materials and research and development of civil materials with ultra-high energy absorption characteristics. The cemented filling material with bionic structure includes a bionic honeycomb skeleton and cemented filling slurry, where the cemented filling slurry is poured in the bionic honeycomb skeleton.

Abstract: A method for determining an undersampling error for a magnetic resonance fingerprinting (MRF) pulse sequence includes retrieving a plurality of sets of spatial response functions. Each set of spatial response functions is associated with a tissue type in a reference image and is based on a tissue mask of the reference image for each tissue type. A signal evolution for each tissue type may be generated based on, for example, the MRF pulse sequence, An undersampled image may be generated for each tissue type using the set of spatial response functions and the signal evolutions for the tissue type. At least one quantitative parameter may be determined by comparing an undersampled image series created from the undersampled images to an MRF dictionary. An undersampling error for the MRF pulse sequence may be generated by comparing a quantitative map (or maps) for the quantitative parameter (or parameters) and the reference image.

Abstract: Disclosed are a grouting material for modifying mudstone, a preparation method and an application thereof, belonging to the technical field of material science and geotechnical engineering. The grouting material for modifying mudstone includes the following raw materials: cement, water, superfine micronized powder, water reducer, silane, fiber, diatomite, urea-formaldehyde resin and waterborne polyurethane. The preparation method of the grouting material for modifying mudstone includes steps of: (1) weighing the raw materials in parts by weight, mixing water of 40% of a total amount of water with water reducer, superfine micronized powder, fiber and diatomite, stirring to obtain a material A; (2) adding silane, urea-formaldehyde resin, waterborne polyurethane and residual water into the material A, obtaining a material B after continuous stirring; and (3) adding cement into the material B, and uniformly stirring to obtain the grouting material for modifying mudstone.

Abstract: Systems and methods for automated lesion detection are provided. Quantitative maps of tissue properties may be generated from magnetic resonance fingerprinting (MRF) data and may be used with a z-score determination and a trained lesion detection classifier for automated epilepsy lesion detection. In some configurations, lesion detection may be performed at an individual-level with MRF data associated with a subject that includes a detectable lesion.

Abstract: A method for multi-dimensional, relaxation-diffusion magnetic resonance fingerprinting (MRF) includes performing, using a magnetic resonance imaging (MRI) system, a pulse sequence that integrates free-waveform b-tensor diffusion encoding into a magnet resonance fingerprinting pulse sequence to perform a multi-dimensional, relaxation-diffusion encoding while acquiring MRF signal evolutions, processing, using a processor, the acquired MRF signal evolutions to determine at least one relaxation parameter and at least one diffusivity parameter, and generating, using the processor, a report including at least one of the at least one relaxation parameter and the at least diffusivity parameter.

Abstract: A neodymium-iron-boron (NdFeB) magnet is represented by a chemical formula R1-R2-Fe-M-B, and has a composite structure of a high-coercivity region and a high-remanence region. In the formula R1 is a rare earth element comprising at least Nd, R2 is a heavy rare earth element comprising at least Dy and/or Tb, and M is a transition metal element comprising at least Co. The neodymium-iron-boron magnet can greatly improve resistance to high-temperature demagnetization and inhibit reduction of magnetic flux of a magnet by adopting a small amount of Dy/Tb. The magnet can be used in an embedded high-speed motor. The preparing method for the magnet improves the material utilization and the production efficiency, and is feasible for a large-scale production.

Abstract: Distributed security key management for protecting roaming data via a trusted platform module is performed by systems that include first and second processors, and first and second respective hardware security modules. The first security module encrypts a security key using a public key from the second security module, and the encrypted security key is provided to the second security module. A virtual machine (VM) executed by the first processor has a first virtual security module instance having state data that includes a storage key encrypting VM virtual disk data and that is encrypted with the security key. When a transfer condition is determined, the VM is transferred and executed by the second processor, using a second virtual security module instance, based on decrypting the security key by the second security module using a private key and decrypting the state data for the second virtual security module using the security key.

Abstract: Provided are a map data processing method and apparatus, and a storage medium, which relate to the field of data processing technology and, in particular, to artificial intelligence technology, for example, computer vision, map technology, and intelligent transportation. A specific implementation solution includes: processing landform coverage data according to a type of surface species coverage and a data processing rule associated with the type of surface species coverage to obtain a surface species coverage effect map; and generating a landform map according to the surface species coverage effect map and a reference map.

Abstract: Automated processing and radiomic analysis of magnetic resonance imaging (“MRI”), such as multi-contrast MR images, and magnetic resonance fingerprinting (“MRF”) data, such as quantitative parameter maps, are integrated into a single workflow.

Abstract: Radiomic analysis of multiparametric magnetic resonance imaging (“MRI”) and magnetic resonance fingerprinting (“MRF”) data enhances delineation and mapping of tumor regions. Radiomic features are extracted from MRI and MRF tumor images. Distinct tumor regions, including but not limited to necrotic core, enhancing tumor, and peritumoral white matter, are segmented and mapped. Whole tumor as well as tumor region characteristics are evaluated. Tumors can also be differentiated and classified by pathology, grading, staging, and so on.