Abstract: Embodiments of the present disclosure provide a solution for point cloud coding. A method for point cloud coding comprises: determining, for a current point in a current point cloud (PC) sample of a point cloud sequence during a conversion between the current PC sample and a bitstream of the point cloud sequence, at least one search center from a set of points in a first PC sample of the point cloud sequence based on metrics related to geometric locations of the current point and the set of points; determining at least one neighboring point of the current point based on the at least one search center; and performing the conversion based on the at least one neighboring point. Compared with the conventional solution, the proposed method can advantageously improve the accuracy of the nearest neighbor search and the attribute inter prediction.

Abstract: Implementations of the present disclosure provide a solution for reordering merge candidates. In this solution, during a conversion between a current video block of a video and a bitstream of the video, a template matching cost associated with each of a plurality of candidates of motion information for the current video block is determined. The template matching cost is determined based on a first difference between a set of neighboring samples of the current video block and a set of reference samples corresponding to the set of neighboring samples, and a second difference between a set of reconstructed samples neighboring to the set of neighboring samples and the set of reference samples. The set of reference samples is determined based on motion information indicated by a respective candidate. Then, the plurality of candidates of motion information is reordered based on the template matching cost.

Abstract: A method of visual media processing includes determining a size of a buffer to store reference samples for prediction in an intra block copy mode; and performing a conversion between a current video block of visual media data and a bitstream of the current video block, using the reference samples stored in the buffer, wherein the conversion is performed in the intra block copy mode which is based on motion information related to a reconstructed block located in same video region with the current video block without referring to a reference picture.

Abstract: A method and apparatus for performing a random access (RACH) procedure is disclosed. In one embodiment, a method performed by a wireless communication node, includes: performing a plurality of random access (RACH) procedures with a wireless communication device on a first frequency resource set and a second frequency resource set, wherein the plurality of RACH procedures each comprises: receiving a first message on a first frequency resource from the wireless communication device, wherein the first frequency resource is selected from the first frequency resource set; transmitting a second message on a second frequency resource to the wireless communication device within a pre-determined time window, wherein the second frequency resource is selected from the second frequency resource set; receiving a third message on the first frequency resource from the wireless communication device; and transmitting a fourth message on the second frequency resource to the wireless communication device.

Abstract: The present disclosure provides a permanent-magnet fault-tolerant in-wheel motor based on an active sensorless strategy and drive and design methods thereof. The present disclosure proposes the permanent-magnet fault-tolerant in-wheel motor drive system based on an active sensorless strategy by considering sensorless operation performance in advance in a motor design stage. The present disclosure adopts fractional-slot concentrated windings, and ingeniously arranges alternating poles, a multi-layer magnetic barrier, and auxiliary permanent magnets, thus improving a sensorless operation accuracy of the motor while ensuring fault tolerance of the motor. The present disclosure proposes a frequency-band-adaptive secondary harmonic suppression strategy at a control layer to suppress an influence of a secondary salient harmonic on position observation and improve dynamic response performance of a system.

Abstract: A configuration of an initial access communication, such as the random access channel (“RACH”) process, is performed for initializing communications and/or synchronizing devices. The RACH format can be modified and configured for improved communications. For example, a RACH preamble can be modified based on multiple groups or measurements with reference signals. The preamble or format can be modified with a modification to the time duration.

Abstract: Embodiments of the present disclosure provide a solution for video processing. A method for video processing is proposed. The method comprises: refining, during a conversion between a target block of a video and a bitstream of the target block, a bi-motion vector predictor (MVP) of the target block by applying a decoder side motion vector derivation process, and wherein the target block is coded with an advanced motion vector prediction (AMVP) mode; and performing the conversion based on the refined bi-MVP.

Abstract: An inspection system and method, and the system includes: a ray source; a detector assembly; and a conveying device for carrying an aviation pallet cargo. The ray source and the detector assembly are movable in a traveling direction parallel to the central axis relative to the conveying device so that the aviation pallet cargo enters an inspection region, the ray source is translatable between a plurality of scanning positions, and a translation distance of the ray source between two adjacent scanning positions is greater than a spacing between adjacent target spots of the ray source. When the ray source is located at one of the scanning positions, the ray source and the detector assembly move in the traveling direction and the ray source emits X-rays; and when the ray source and the detector assembly move a predetermined distance in the traveling direction, the ray source translates to another one of the plurality of scanning positions.

Abstract: Restrictions on motion vector difference (MVD)are disclosed. In one example method of video processing, performing a conversion between a first block of video and a bitstream representation of the first block based on a constrained signaled MVD component associated with the first block, wherein value of the signaled motion vector difference component is constrained in a predetermined range.

Abstract: Chroma deblocking harmonization for video coding are described. In an exemplary aspect, a method for video processing includes deriving, for a conversion between a video processing unit of the video and a bitstream representation of the video processing unit, at least one decision result associated with decisions in a chroma deblocking filter decision process of the video processing unit; applying a same decision result from the at least one decision result for all chroma components of the video processing unit; and performing the conversion based on the same decision result.

Abstract: An inspection system and method, the system includes: a ray source rotatable between at least two scanning positions around a rotation axis, a rotation angle of the ray source between two adjacent scanning positions being greater than an angle of adjacent target spots of the ray source relative to the rotation axis; a detector assembly; and a conveying device for carrying an object. The ray source and the detector assembly are movable in a traveling direction relative to the conveying device so that the object enters an inspection region. When the ray source is at one of the scanning positions, the ray source and the detector assembly move in the traveling direction and the ray source emits X-rays; and when the ray source and the detector assembly move a predetermined distance in the traveling direction, the ray source rotates around the rotation axis to another one of the scanning positions.

Abstract: Provided is a method for large-scale preparation of a purified preparation of a recombinant lentiviral vector at the GMP grade. The method comprises: (a) providing raw material feed liquid to be purified that comprises recombinant viral vectors; (b) carrying out a microfiltration treatment on the feed liquid to obtain a microfiltered filtrate comprising the recombinant viral vectors; (c) optionally concentrating the filtrate to obtain a concentrated filtrate; (d) purifying the filtrate obtained in the previous step by means of chromatography to obtain a crude pure product comprising the recombinant viral vectors; and (e) subjecting the crude pure product obtained in the previous step to liquid exchange and elaborate purification to obtain the purified recombinant viral vectors.

Abstract: Embodiments of the present disclosure provide a solution for video processing. A method for video processing is proposed. The method comprises: applying, during a conversion between a target block of a video and a bitstream of the target block, a process of at least one of: a decoder side motion vector refinement (DMVR) or a DMVR variant to the target block that is coded with a target mode; and performing the conversion based on the process of at least one of: the DMVR or the DMVR variant.

Abstract: Embodiments of the present disclosure provide a solution for point cloud coding. A method for point cloud coding comprises: determining, for a current point in a current point cloud (PC) sample of a point cloud sequence during a conversion between the current PC sample and a bitstream of the point cloud sequence, at least one neighboring point from a set of points in a reference PC sample of the current PC sample, the set of points being in a group of level of details (LODs) of the reference PC sample; and performing the conversion based on the at least one neighboring point. Compared with the conventional solution, the proposed method can advantageously improve the accuracy of the nearest neighbor search.

Abstract: Techniques for video processing, including video coding, video decoding and video transcoding are described. One example method includes performing a conversion between a video picture that includes one or more tiles and one or more rectangular slices and a bitstream of the video according to a rule. The rule specifies that, for iteratively determining information about the one or more rectangular slices, a variable indicating a tile index is updated only for slices having indices that are smaller than a value equal to a number of slices in the video picture minus 1.

Abstract: A video processing method includes performing a conversion between a video block of a video and a coded representation of the video. The coded representation conforms to a format rule. The format rule specifies that applicability of a transform skip mode to the video block is determined by a coding condition of the video block. The format rule also specifies that a syntax element indicative of applicability of the transform skip mode is omitted from the coded representation. The transform skip mode includes skipping applying a forward transform to at least some coefficients prior to encoding into the coded representation, or during decoding, skipping applying an inverse transform to at least some coefficients prior to decoding from the coded representation.

Abstract: A video coder may determine a motion vector of a non-adjacent block of a current picture of the video data. The non-adjacent block is non-adjacent to a current block of the current picture. Furthermore, the video coder determines, based on the motion vector of the non-adjacent block, a motion vector predictor (MVP) for the current block. The video coder may determine a motion vector of the current block. The video coder may also determine a predictive block based on the motion vector of the current block.

Abstract: A method of video processing is described. The method includes: determining, based on a coding mode of a current video block of a video, whether a position dependent intra prediction combination (PDPC) method is used for coding the current video block based on a first rule, and performing a conversion between the current video block and a coded representation of the video according to the determining, wherein the PDPC method combines neighboring samples with a prediction signal of the current video block to generate a refined prediction signal of the current video block.

Abstract: Magnetic field has been considered as a safe and promising method for remote control of medical robots in body. Systems that implement electromagnetic coils can provide wide control bandwidth and on-off capability. However, scaling-up the working space of such systems for clinical use and increasing energy efficiency to reduce heat generation have always been a challenging task. The design, modeling and control methods for a magnetic actuation system with multiple mobile electromagnetic coils with decoupled movements are introduced. The high flexibility of such configuration and the proposed real-time control strategy enables the system to enlarge the working space by tracking the locomotion of the robot, deal with the irregularly shaped obstructions inside the working area, work with medical imaging systems for localization of the medical robots, generate various kind of magnetic field for actuation and conduct real-time optimization on coils' positions to enhance energy efficiency.

Abstract: Methods and systems for image registration using an intelligent artificial agent are disclosed. In an intelligent artificial agent based registration method, a current state observation of an artificial agent is determined based on the medical images to be registered and current transformation parameters. Action-values are calculated for a plurality of actions available to the artificial agent based on the current state observation using a machine learning based model, such as a trained deep neural network (DNN). The actions correspond to predetermined adjustments of the transformation parameters. An action having a highest action-value is selected from the plurality of actions and the transformation parameters are adjusted by the predetermined adjustment corresponding to the selected action. The determining, calculating, and selecting steps are repeated for a plurality of iterations, and the medical images are registered using final transformation parameters resulting from the plurality of iterations.