Abstract: Provided are a method and apparatus for evaluating image relative definition, a device and a medium, relating to technologies such as computer vision, deep learning and intelligent medical. A specific implementation solution is: extracting a multi-scale feature of each image in an image set, where the multi-scale feature is used for representing definition features of objects having different sizes in an image; and scoring relative definition of each image in the image set according to the multi-scale feature by using a relative definition scoring model pre-trained, where the purpose for training the relative definition scoring model is to learn a feature related to image definition in the multi-scale feature.

Abstract: A device for rapidly loading and releasing a syringe. A limiting flange and clamping flange are on an outer side wall of an end, connected to the device, of the syringe. The clamping flange is close to a rear end of the syringe. The device includes an injection head. An outer collar, middle plate, and inner collar are sequentially inside the injection head. The outer collar includes an upper and lower part that are disposed up and down. The inner collar includes an upper part of the inner collar and a lower part of the inner collar that are disposed up and down. Elastic structures are between the upper part of the inner collar and injection head and between the lower part of the inner collar and injection head. The injector syringe can be loaded onto the device and taken out rapidly if the syringe is rotated.

Abstract: A syringe and device for rapidly loading and releasing the syringe. A limiting flange and clamping flange are on a connection end of the syringe. The clamping flange is proximate to a rear end of the connection end and includes at least two clamping portions. The device includes an injection head, pushing ring, guide sleeve, and at least two bayonet locks. The bayonet locks are on the injection head by first elastic structures flexible along a radial direction. One end of the pushing ring stretches into the guide sleeve. A second elastic structure is between the pushing ring and guide sleeve. The other end of the pushing ring faces sides of the bayonet locks. Bump components are disposed on sides of the bayonet locks, with bump slots corresponding thereto. Clamping slots for insertion of the clamping portions are on an end face of the pushing ring.

Abstract: A syringe and device for rapidly loading and releasing the syringe. A limiting flange and clamping flange are on a connection end of the syringe. The clamping flange is proximate to a rear end of the connection end and includes at least two clamping portions. The device includes an injection head, pushing ring, guide sleeve, and at least two bayonet locks. The bayonet locks are on the injection head by first elastic structures flexible along a radial direction. One end of the pushing ring stretches into the guide sleeve. A second elastic structure is between the pushing ring and guide sleeve. The other end of the pushing ring faces sides of the bayonet locks. Bump components are disposed on sides of the bayonet locks, with bump slots corresponding thereto. Clamping slots for insertion of the clamping portions are on an end face of the pushing ring.

Abstract: A device for rapidly loading and releasing a syringe. A limiting flange and clamping flange are on an outer side wall of an end, connected to the device, of the syringe. The clamping flange is close to a rear end of the syringe. The device includes an injection head. An outer collar, middle plate, and inner collar are sequentially inside the injection head. The outer collar includes an upper and lower part that are disposed up and down. The inner collar includes an upper part of the inner collar and a lower part of the inner collar that are disposed up and down. Elastic structures are between the upper part of the inner collar and injection head and between the lower part of the inner collar and injection head. The injector syringe can be loaded onto the device and taken out rapidly if the syringe is rotated.

Abstract: A hybrid Mote Carlo and deterministic particle transport method based on the transition area is provided. Firstly, the geometric complexity is analyzed based on the CAD model. Based on the geometric complexity and the physical characteristics, an area having complex geometry is divided as a Monte Carlo particle transport calculation area, an area having simple geometry is divided as a deterministic particle transport calculation area, and a transition area with a determined thickness is created between the two areas. In the particle transport calculation, the Monte Carlo particle transport calculation is performed in the Monte Carlo particle transport area and the transition area, and the deterministic calculation is performed in the deterministic area and the transition area. Basically consistent results of the transition area under the two calculations can be achieved through multiple iterations, thereby realizing seamless coupling of the two calculations.

Abstract: A depth peeling based nuclear radiation shield computational mesh generation method and a depth peeling based nuclear radiation shield computational mesh generation system are provided. The method includes: generating an outline pixel matrix of geometries with the depth peeling technique, performing conversion in an image space to obtain outline meshes of the geometries; then obtaining internal meshes of the geometries based on the outline meshes by a scanning line method, so as to fast generate the nuclear radiation shield computational meshes.