Abstract: In a method, a base mesh includes a subset of a plurality of vertices of a mesh. A position prediction of a current vertex of the base mesh is determined. A motion field prediction of the current vertex of the base mesh is determined. A position prediction residue for the position prediction of the current vertex is determined based on a first quantization step value. A motion field prediction residue for the motion field prediction of the current vertex is determined based on a second quantization step value, where the second quantization step value is dependent on the first quantization step value. A position of the current vertex of the base mesh is reconstructed based on the position prediction and the position prediction residue. A motion field of the current vertex of the base mesh is reconstructed based on the motion field prediction and the motion field prediction residue.

Abstract: In a method, a position prediction of a current vertex of a base mesh associated with a mesh in a current mesh frame is determined. An attribute prediction of the current vertex is determined. The base mesh includes a subset of a plurality of vertices of the mesh. A position prediction residue for the position prediction of the current vertex is quantized to generate a quantized position prediction residue. An attribute prediction residue for the attribute prediction of the current vertex is quantized to generate a quantized attribute prediction residue. The quantized position prediction residue for the position prediction of the current vertex is entropy coded in a bitstream. The quantized attribute prediction residue for the attribute prediction of the current vertex is entropy coded in the bitstream.

Abstract: An apparatus to determine a cardiac motion feature and a method thereof. The method includes: acquiring wireless signals reflected by multiple body parts via a wireless sensing device; filtering the acquired wireless signals using a single-band filter or a multi-band filter, to obtain filtered time domain signals; calculating signal quality evaluation values for evaluating signal quality of the filtered time domain signals; selecting candidate signals from the filtered time domain signals according to the signal quality evaluation values; and determining a cardiac motion feature based on the candidate signals. The method is easy to implement and easy to operate, which can not only guarantee accuracy of the obtained cardiac motion feature, but also has a strong anti-noise capability and high privacy protectiveness.

Abstract: A method performed includes encoding a first vertex, a second vertex, and a third vertex of a first face of a polygon mesh; determining a set of adaptive weights that comprise a first weight, a second weight, and a third weight; and performing parallelogram prediction to predict a fourth vertex in a second face of the polygon mesh by applying the first weight to the first vertex, the second weight to the second vertex, and the third weigh to the third vertex, in which the first weight is less than 0.8 and greater than 0, in which the second weight is greater than ?0.8 and less than 0, and in which the third weight is less than 0.9 and greater than 0.

Abstract: In a method of mesh decoding, a bitstream that includes prediction information of a plurality of vertices in a mesh frame is received. A prediction value of a current vertex of the plurality of vertices is determined based on (i) a value of the current vertex received in the bitstream and (ii) each distance between the current vertex and one or more neighboring vertices of the current vertex in the mesh frame. The current vertex is reconstructed based on the prediction value of the current vertex.

Abstract: A method and apparatus comprising computer code configured to cause a processor or processors to obtain, from a bitstream, a mesh representing an encoded volumetric data of at least one three-dimensional (3D) visual content, partition a plurality of vertices of the mesh into a plurality of groups, and decode the encoded volumetric data by predicting the vertices in each group of the plurality of groups.

Abstract: A method and apparatus including computer code configured to cause a processor or processors to receive a bitstream including a mesh representing an encoded volumetric data of at least one three-dimensional (3D) visual content, the mesh including a group of frames including a current frame and a reference frame, obtain, from the received bitstream, a high-level syntax indicating a motion field for the mesh, and the motion field includes a difference between a first vertex position in the current frame and a second vertex position in the reference frame, and decode the mesh based at least on the high-level syntax.

Abstract: In a method, a base mesh is generated from a down-sampled input mesh in a current frame, where the base mesh includes a plurality of vertices. A prediction mode to be applied to the base mesh is determined. The prediction mode is an inter prediction mode or an intra prediction mode. Based on the prediction mode being determined as the intra prediction mode, duplicate vertices among the plurality of vertices in the base mesh are merged to generate a subset of the plurality of vertices. At least the subset of the plurality of vertices is encoded based on the determined intra prediction mode to generate prediction information of at least the subset of the plurality of vertices.

Abstract: This invention discloses a method for preparing hexamethylenediamine, comprising the following steps: (1) under ammoniation reaction conditions, optionally in the presence of a solvent, subjecting hexanediol and ammonia to an ammoniation reaction to obtain an ammoniation reaction product; (2) separating and obtaining from the ammoniation reaction product a stream containing hexamethyleneimine and water, dehydrating the stream containing hexamethyleneimine and water to obtain a dehydrated stream containing hexamethyleneimine, and returning at least part of the dehydrated stream containing hexamethyleneimine as a circulating stream to the step (1), wherein a water content in the dehydrated stream containing hexamethyleneimine is less than 3 wt %, preferably less than 1.5 wt %. The invention can not only improve the yield of hexamethylenediamine but can also prolong the service life of the catalyst.

Abstract: A distributed ultrasonic monitoring system for an internal fracture process of an ultra-large three-dimensional geological model includes a high-power ultrasonic phase control apparatus, ultrasonic transmitting and receiving integrated sensors, and measurement and control and three-dimensional ultrasonic imaging software. A geometric asymmetric monitoring layout mode is adopted to form a three-dimensional monitoring grid.

Abstract: A method and apparatus comprising computer code configured to cause a processor or processors to obtain a coded bitstream comprising a mesh sequence of a plurality of meshes of the 3D visual content and a displacement of a local coordinate system (LCS) or a global coordinate system (GCS) of at least one mesh of the plurality of meshes, the LCS or GCS being at a vertex of the at least one mesh, determine a projection coefficient of the displacement of the LCS or GCS, the projection coefficient indicating a unit tangent vector of the LCS or GCS in a normal direction to the vertex and is based on normalizing a tangent basis vector of the LCS or GCS, and decode the mesh sequence based on the projection coefficient of the displacement.

Abstract: Aspects of the disclosure includes methods and apparatuses for video decoding and video encoding and a method of processing visual media data. The apparatus for video decoding includes processing circuitry configured to receive coded information indicating that a current base mesh of a current frame is coded with an inter mode and indicating at least one reference frame that is used to code the current base mesh of the current frame. The processing circuitry is configured to determine the at least one reference frame that is indicated by the received coded information and reconstruct, using the inter mode, the current base mesh of the current frame based on a respective reference base mesh of each of the at least one reference frame.

Abstract: A method and apparatus comprising computer code for mesh coding configured to cause a processor or processors to receive a dynamic input mesh representing a volumetric data of at least one three-dimensional (3D) visual content; determine, for a mesh at a first level of sub-division, a plurality of first vertices, wherein the plurality of first vertices are determined using a mid-point sub-division scheme and a plurality of previous vertices of a mesh at a previous level of sub-division, wherein the mesh at the first level and the mesh at the previous level are generated from the dynamic input mesh; determine a valence of a first vertex among the plurality of first vertices to be a first value based on whether a selected two vertices of the mesh at the first level; and generate a compressed bitstream for the dynamic input mesh based on the valence of the first vertex.

Abstract: In certain embodiments, this disclosure provides novel methods of increasing the viable cell density of an N?1 large-scale bioreactor cell culture, comprising culturing a host cell expressing a recombinant poly peptide of interest in a non-perfusion-based culture system, and wherein the viable cell density is increased to at least 5×106 cells/mL. In certain embodiments, the disclosure provides novel methods for large-scale production of a recombinant polypeptide of interest, comprising: (1) culturing a host cell expressing a recombinant polypeptide of interest in an N?1 stage in a non-perfusion-based culture system, wherein the viable cell density is increased to at least 5×106 cells/mL; and (2) culturing N fed-batch production cells in an enriched media with high-seed density at least 1.5×106 cells/mL, wherein the N fed-batch production cells are inoculated from the N-1 stage in a non-perfusion-based culture system.

Abstract: A method and apparatus comprising computer code configured to cause a processor or processors to determine more than one vertices in an input mesh, and group the more than one vertices in more than one group of vertices. The grouping of a respective vertex in a respective group may be based on a topological distance of the respective vertex. In embodiments, the processor or processors may also determine a set of filter coefficients for the more than one group of vertices; and signal the more than one group of vertices and the set of filter coefficients.

Abstract: A method of decoding a dynamic mesh sequence, the method includes: receiving a coded bitstream comprising the dynamic mesh sequence in a first frame and a second frame that occurs later than the first frame; reconstructing the dynamic mesh in the first frame; determining whether a duplicate vertex removal mode is enabled in which a motion vector of a vertex in the dynamic mesh second that is a duplicate of a vertex in the dynamic mesh sequence in the first frame; based on determining that the duplicate vertex removal mode is enabled, decoding a motion vector for each vertex in the second frame that is not a duplicate of a vertex in the reconstructed first frame; and reconstruct the dynamic mesh sequence in the second frame using the reconstructed dynamic mesh in the first frame and each decoded motion vector.

Abstract: Processing circuitry receive first UV coordinates associated with first vertices of a first patch and second UV coordinates associated with second vertices of a second patch. The first patch and the second patch are partitions from a three dimensional (3D) mesh, the 3D mesh represents a surface of an object with polygons and is partitioned into patches. The first patch includes the first vertices that are mapped to first two dimensional (2D) vertices of a first 2D patch in a 2D map according to the first UV coordinates, the second patch includes the second vertices that are mapped to second 2D vertices of a second 2D patch in the 2D map according to the second UV coordinates. The processing circuitry can apply various overlapping checking techniques on the first 2D patch and the second 2D patch.

Abstract: A method and apparatus comprising computer code configured to cause a processor or processors to obtain, from a bitstream, a mesh representing an encoded volumetric data of at least one three-dimensional (3D) visual content, and decode the encoded volumetric data based on displacement vectors of vertices of the mesh, and the displacement vectors are based on a square root of three subdivision in which faces of the mesh are iteratively subdivided in a manner in which a number of subdivided faces resulting from subdividing the mesh in an iteration is less than four times a number of faces from before subdividing the mesh in the iteration.

Abstract: In some examples, an apparatus for mesh coding includes processing circuitry. The processing circuitry receives a bitstream carrying encoded information of a mesh that is partitioned into patches. The bitstream includes a first portion and a second portion, the first portion includes patch information, the second portion includes patch boundary information that indicates at least a first edge of a first patch and a second edge of a second patch are a pair of edge mates. The processing circuitry decodes the first portion to obtain the patch information, and decodes the second portion to obtain the patch boundary information. The processing circuitry generates a reconstructed mesh based on the patch information and the patch boundary information, the first edge and the second edge are mapped into a same edge in the reconstructed mesh to connect the first patch with the second patch.

Abstract: Method, apparatus, and system for video encoding are provided. The process may include receiving volumetric data of at least one three-dimensional (3D) content. The process may also include determining a first collection of one or more duplicate vertices in a first frame of the volumetric data using a mapping function and then determining a second collection one or more non-skippable duplicate vertices among the first collection. In some embodiments, the one or more duplicate vertices comprises vertex indices of vertices in the first frame may have same mapping as respective vertices in a reference frame. In some embodiments, the second collection may include indices of the one or more non-skippable duplicate vertices with respect to positions of the respective vertices in the first collection. The process may include signaling the second collection and a number of vertices in the second collection.