Abstract: The present disclosure provides a method and an apparatus for analyzing a video scenario, and relates to the field of image recognition technology. A specific embodiment includes: extracting a frame of picture from a to-be-analyzed video at a preset time interval, recording a position of each frame of picture in the video, and establishing an index table of the picture and the position; labeling the each extracted frame of picture through a pre-trained scenario classification model, and adding a label of the extracted frame of picture to the index table; aggregating labels in the index table, and marking a new label to the picture in the index table; and outputting a position corresponding to the new label in the index table.

Abstract: A compound is represented by the following general formula (I): (I) wherein each of Rf1 and Rf2 is, independently, F, CF3, C2F5, C3F7, or C4F9, with the proviso that if either of Rf1 and Rf2 is fluorine, then the other is not fluorine; Rf3 is F, CF3, C2F5, C3F7 or CF(CF3)2; Rf4 is F, CF3, C2F5, C3F7 or CF(CF3)2; and Rh is CH3 or C2H5.

Abstract: The present invention provides synthetic nucleic acid sequences comprising 10-30 nucleotides of the N1 and N2 gene regions and/or the 3? non-coding region of the SARS-associated coronavirus Cov-2 (SARS-CoV-2) genome, and a synthetic nucleic acid sequence comprising 10-30 nucleotides of a nucleic acid sequence that is complementary to at least one of those regions. Also provided are compositions comprising the sequences, and uses of the sequences in diagnostic kits. The present invention further provides a primer and probe set for determining the presence or absence of SARS-associated coronavirus Cov-2 in a biological sample, wherein the primer set comprises at least one of the synthetic nucleic acid sequences. Also provided are a composition comprising the primer and probe set, and use of the primer and probe set in a diagnostic kit. Finally, the present invention provides kits and methods for determining the presence or absence of SARS-associated coronavirus Cov-2 (SARS-CoV-2) in a biological sample.

Abstract: The present disclosure provides a method for identifying key point locations in an image. The method includes: obtaining an image to be detected, and obtaining a feature map and a saliency map of the image to be detected; generating a score response map of the image to be detected based on the feature map of the image to be detected; obtaining a first key point location of a key point on the score response map; obtaining a second key point location of the key point mapped on the image to be detected based on the first key point location; and correcting the second key point location based on the saliency map.

Abstract: A method for retrieving an image is provided. The method includes: extracting a global feature and a local feature of an image to be retrieved, and a global feature and a local feature of an image to be recalled by employing a preset neural network model; determining a candidate image set by matching the global feature of the image to be retrieved with the global feature of the image to be recalled and matching the local feature of the image to be retrieved with the local feature of the image to be recalled; and determining a retrieval result from the candidate image set by performing local feature verification on the image to be retrieved and a candidate image in the candidate image set. An apparatus for retrieving an image, an electronic device, and a medium are further provided.

Abstract: Various embodiments include a control valve comprising a first valve assembly between an inlet and an outlet. The first valve assembly comprises: a valve seat fixed relative to the valve body with an opening in a sidewall; a slider rotating inside the valve seat to block the opening, but stationary in an axial direction; a regulating valve plug with an opening at one end, surrounding the valve seat and movable in the axial direction to block the opening in the sidewall of the valve seat; and a first valve stem connected to the slider and to the regulating valve plug, the first valve stem having one end extending out of the valve body. A first overlap between the slider and the opening and a second overlap of the plug and the opening are changed by movement of the first valve stem.

Abstract: The present invention provides a multi-unit rotary system and method for storage, intelligent sorting and picking of express parcels. Through adoption of layered design of a rotary storage unit, different sizes of parcels are stored in a sorting manner, thereby effectively increasing the utilization rate of the storage space; besides, due to the storage design of the subunits, arrangement of storage units of the system is more flexible, and the number of rotary storage unit subunits can be set freely according to the requirements for site space and the storage capacity for express parcels; through adoption of overall unit combination design of the present invention, the mounting, the layout and the maintenance of the system are more convenient, and during the operation of the system, automatic sorting and storage of the express parcels are achieved.

Abstract: Provided are a desktop 3D display system and a display method thereof. The desktop 3D display system comprises a 2D image display module (1), a viewing angle directing module (2), a light modulating module (3) and a rotating module (5), wherein the 2D image display module is used for receiving and displaying an integral imaging source; the viewing angle guide module is arranged on the 2D image display module, and is used for guiding light emitted from the integral imaging source of the 2D image display module; the light modulation module is arranged above the viewing angle guide module for modulating the light guided by the viewing angle guide module and reconstructing a 3D image; and the rotation module is configured to enable synchronous rotation of the 2D image display module, the view angle guide module and the light modulation module, wherein, the rotation angle speed of the synchronous rotation is associated with the switching speed of the integral imaging source of the 2D image display module.

Abstract: Optical film is disclosed. The optical film includes a binder, a plurality of particles, and a plurality of interconnected voids. The volume fraction of the plurality of interconnected voids in the optical film is not less than about 20%. The weight ratio of the binder to the plurality of the particles is not less than about 1:2.

Abstract: The present invention provides a multi-unit rotary system and method for storage, intelligent sorting and picking of express parcels. Through adoption of layered design of a rotary storage unit, different sizes of parcels are stored in a sorting manner, thereby effectively increasing the utilization rate of the storage space; besides, due to the storage design of the subunits, arrangement of storage units of the system is more flexible, and the number of rotary storage unit subunits can be set freely according to the requirements for site space and the storage capacity for express parcels; through adoption of overall unit combination design of the present invention, the mounting, the layout and the maintenance of the system are more convenient, and during the operation of the system, automatic sorting and storage of the express parcels are achieved.