Abstract: The present application belongs to the technical field of monitoring of durability of concrete, and particularly relates to a method for optimizing a structure of an electrical capacitance tomography sensor and analyzing an electromagnetic field. A specific process of the method includes eight steps: parameter setting, geometric setting, material setting, mesh generation, physical field setting, solution, sensor structure optimization and calculation of electromagnetic field distribution. The method proposes a new concept for solving a forward problem of an ECT system based on COMSOL software. After modeling is completed, uniformity of a sensitive field of the ECT sensor is analyzed according to calculation results, and structural parameter values of components of the ECT sensor are adjusted to seek an optimal design scheme.

Abstract: The present invention discloses a method and an apparatus for extracting mountain landscape buildings based on high-resolution remote sensing images. The method comprises: segmenting a remote sensing image, and extracting non-vegetation areas from the remote sensing image by using NDVI; segmenting the non-vegetation areas, and extracting building areas by using NDBI; segmenting the building areas again, and calculating a normalized difference build shadow index NSBI of each patch; calculating NSBI separator of each patch in the non-vegetation areas and setting a separator threshold, and extracting landscape building areas based on the threshold. In the present invention, by introducing a near infrared band in the remote sensing image spectrum, in which there is a significant difference between shadows and non-shadows, the influence of large shadow areas in mountainous shady areas in the remote sensing image on the result of extraction is reduced.

Abstract: A tibial prosthesis and a knee prosthesis are provided. The tibial prosthesis includes a tibial plateau, a first tibial insert and a second tibial insert. The tibial plateau has a proximal end face defining a mount surface arranged with respect to a first axis. The first tibial insert is disposed on the mount surface rotatably about the first axis. The first tibial insert has a first concave surface centered on the first axis. The first concave surface is distally recessed. The second tibial insert is disposed on the tibial plateau and has a second concave surface extending along an arc-shaped trajectory line that is parallel to the mount surface. The arc-shaped trajectory line is centered on the first axis, and the second concave surface is distally recessed. The first tibial insert and the second tibial insert are arranged independently of each other, and the first tibial insert is located medially to the second tibial insert.

Abstract: The present application belongs to the technical field of monitoring of durability of concrete, and particularly relates to a method for optimizing a structure of an electrical capacitance tomography sensor and analyzing an electromagnetic field. A specific process of the method includes eight steps: parameter setting, geometric setting, material setting, mesh generation, physical field setting, solution, sensor structure optimization and calculation of electromagnetic field distribution. The method proposes a new concept for solving a forward problem of an ECT system based on COMSOL software. After modeling is completed, uniformity of a sensitive field of the ECT sensor is analyzed according to calculation results, and structural parameter values of components of the ECT sensor are adjusted to seek an optimal design scheme.

Abstract: The present disclosure relates to a unicondylar femoral prosthesis, a tibial pad and a unicondylar replacement prosthesis. The unicondylar femoral prosthesis includes an osteotomy surface configured to connect with a femur and an articular surface configured to abut a tibia. The articular surface includes a distal articular surface and a posterior condyle articular surface. The distal articular surface has a first curvature radius on a sagittal plane, the posterior condyle articular surface has a second curvature radius on the sagittal plane, and a ratio of the first curvature radius to the second curvature radius ranges from 1.4 to 2.1. The articular surface has a third curvature radius on a coronal plane, and the third curvature radius is equal to the first curvature radius.

Abstract: Disclosed is an osteotomy device, comprising an osteotomy plate (10), a fixing plate (20) and an adjusting structure (30), wherein the osteotomy plate (10) is mounted on a femur (B) via the fixing plate (20), two ends of the adjusting structure (30) are respectively connected to the fixing plate (20) and the osteotomy plate (10), and the osteotomy plate (10) slides left and right relative to the fixing plate (20) via the adjusting structure (30); and the osteotomy plate (10) has a femoral osteotomy groove (11) for performing an osteotomy from four sides and a femoral trochlear osteotomy groove (12) for performing femoral trochlear osteotomy.

Abstract: The present invention discloses a method and an apparatus for extracting mountain landscape buildings based on high-resolution remote sensing images. The method comprises: segmenting a remote sensing image, and extracting non-vegetation areas from the remote sensing image by using NDVI; segmenting the non-vegetation areas, and extracting building areas by using NDBI; segmenting the building areas again, and calculating a normalized difference build shadow index NSBI of each patch; calculating NSBI separator of each patch in the non-vegetation areas and setting a separator threshold, and extracting landscape building areas based on the threshold. In the present invention, by introducing a near infrared band in the remote sensing image spectrum, in which there is a significant difference between shadows and non-shadows, the influence of large shadow areas in mountainous shady areas in the remote sensing image on the result of extraction is reduced.

Abstract: Disclosed is an osteotomy device, comprising an osteotomy plate (10), a fixing plate (20) and an adjusting structure (30), wherein the osteotomy plate (10) is mounted on a femur (B) via the fixing plate (20), two ends of the adjusting structure (30) are respectively connected to the fixing plate (20) and the osteotomy plate (10), and the osteotomy plate (10) slides left and right relative to the fixing plate (20) via the adjusting structure (30); and the osteotomy plate (10) has a femoral osteotomy groove (11) for performing an osteotomy from four sides and a femoral trochlear osteotomy groove (12) for performing femoral trochlear osteotomy. Using the osteotomy device, a femoral trochlear osteotomy operation can be carried out after performing an osteotomy operation from four sides without replacing the osteotomy plate (10), thus effectively reducing the number of instruments and avoiding repeated disassembly and assembly.

Abstract: The subject technology generates a dataset based at least in part on a set of files. The subject technology generates, utilizing a machine learning model, a set of labels corresponding to the dataset. The subject technology filters the dataset using a set of conditions to generate at least a subset of the dataset. The subject technology generates a virtual object based at least in part on the subset of the dataset and the set of labels, where the virtual object corresponds to a selection of data from the dataset. The subject technology trains a second machine learning model using the virtual object and at least the subset of the dataset, where training the second machine learning model includes utilizing streaming file input/output (I/O), the streaming file I/O providing access to at least the subset of the dataset during training.