Abstract: A tracking system for tracking an expanded state of an object is provided. The tracking system comprises at least one processor and a memory having instructions stored thereon that, when executed by the at least one processor, cause the tracking system to execute a probabilistic filter that iteratively tracks a belief on the expanded state of the object, wherein the belief is predicted using a motion model of the object and is further updated using a compound measurement model of the object. The compound measurement model includes multiple probabilistic distributions constrained to lie on a contour of the object with a predetermined relative geometrical mapping to the center of the object. Further, the tracking system tracks the expanded state of the object based on the updated belief on the expanded state.

Abstract: Embodiments of the present disclosure provide a scroll compressor. The scroll compressor includes: a fixed scroll having an end plate and a fixed scroll wrap extending from the end plate; an orbiting scroll having an orbiting scroll wrap, the orbiting scroll wrap being engaged with the fixed scroll wrap to form a plurality of compression chambers for compressing a medium; a channel formed in the end plate of the fixed scroll, the channel leading to one compression chamber of the plurality of compression chambers; and a valve provided on the end plate of the fixed scroll, and configured to open when a pressure in the one compression chamber is higher than a predetermined pressure threshold so as to allow the medium in the one compression chamber to flow out of the one compression chamber through the channel. The scroll compressor according to the embodiments of the present disclosure, for example, can improve the performance of the scroll compressor.

Abstract: Embodiments of the present disclosure provide a control method of a multimedia conference terminal and a multimedia conference server. The control method of the multimedia conference terminal includes: determining whether multimedia information of a conference site collected by the multimedia conference terminal meets a preset condition; if the multimedia information does not meet the preset condition, acquiring multimedia information of the conference site collected by the multimedia conference terminal; and if the multimedia information meets the preset condition, closing the multimedia conference terminal.

Abstract: Provided is a method for manufacturing a semiconductor wafer and a semiconductor wafer. The method includes: disposing a sacrificial layer on a first surface and a second surface of a patterned substrate, the patterned substrate comprising the first surface and the second surface having different normal directions; exposing the first surface by removing the first portion of the sacrificial layer disposed on the first surface; growing an original nitride buffer layer on the first surface and the second portion of the sacrificial layer; partially lifting off the second portion of the sacrificial layer disposed on the second surface such that at least one sub-portion of the second portion of the sacrificial layer remains on the second surface of the patterned substrate; and growing an epitaxial layer on the original nitride buffer layer, where a crystal surface of the epitaxial layer grows along a normal direction of the patterned substrate.

Abstract: A method and a system of multi-directional scene text recognition based on multi-element attention mechanism are provided. The method includes: performing normalization processing for a text row/column image I output from an external text detection module by a feature extractor, extracting a feature for the normalized image by using a deep convolutional neural network to acquire an initial feature map F0, and adding a 2-dimensional directional positional encoding P to an initial feature map F0 in order to output a multi-channel feature map F; converting the multi-channel feature map F output from a feature extractor by an encoder into a hidden representation H; and converting the hidden representation H output from the encoder into a recognized text by a decoder and using the recognized text as the output result.

Abstract: High-resolution 3D optical polarization tractography (OPT) images of the internal fiber structure of a target tissue. Manipulation of dual-angle imaging data of the fiber orientation inside a target tissue leads to the determination of 3D imaging properties of the target tissue, allowing transmission of the 3D image properties of the target tissue to an OPT processor to produce high-resolution 3D images.

Abstract: A graphics processing method and apparatus, and relates to the field of chip technologies. The method includes: obtaining a first virtual address to be accessed by the GPU, where the first virtual address belongs to a first virtual address space; and obtaining a second virtual address based on the first virtual address, where the second virtual address belongs to a second virtual address space. The second virtual address space is different from the first virtual address space, the second virtual address space and the first virtual address space are mapped to a same physical address space, a physical address to which the first virtual address is mapped corresponds to image data in a first format, and a physical address to which the second virtual address is mapped corresponds to image data in a second format.

Abstract: A high-hardness composite oxide dispersion-strengthened tungsten alloy and a preparation method thereof are disclosed. The high-hardness composite oxide dispersion-strengthened tungsten alloy consists essentially of a tungsten phase, and nano-scale Y2O3 and ZrO2 particles dispersed in the tungsten phase, wherein there is a Y—Zr—O ternary phase structure at a coherent/semi-coherent interface.

Abstract: A method and a system for detecting a scene text may include extracting a first feature map for a scene image input based on a convolutional neural network, and delivering the first feature map to a sequential deformation module; obtaining sampled feature maps corresponding to sampling positions by performing iterative sampling for the first feature map, obtaining a second feature map by performing a concatenation operation in deep learning according to a channel dimension for the first feature map and the sampled feature maps; obtaining a third feature map by performing a feature aggregation operation for the second feature map in the channel dimension, and delivering the third feature map to the object detection baseline network; and performing text area candidate box extraction for the third feature map and obtaining a text area prediction result as a scene text detection result through regression fitting.

Abstract: Movable air conditioner and a control method. The movable air conditioner includes a water receiving tray configured to receive condensed water generated by an evaporator of the movable air conditioner, a first water collection area, a second water collection area; a water guiding member configured to selectively guide the condensed water in the water receiving tray to the first water collection area or the second water collection area, and a controller configured to control the water guiding member to the guide condensed water in the water receiving tray to the first water collection area, and configured to control the water guiding member to guide the condensed water in the water receiving tray to the second water collection area when a water level of the first water collection area reaches a preset value.

Abstract: A semiconductor chip of a light emitting diode includes a substrate, and an N-type gallium nitride layer, a quantum well layer, and a P-type gallium nitride layer stacked on the substrate successively, an N-type electrode electrically connected to the N-type gallium nitride layer, and a P-type electrode electrically connected to the P-type gallium nitride layer. The quantum well layer includes at least one quantum barrier and at least one quantum well stacked successively in sequence, wherein the growth pressure of the quantum barrier and the growth pressure of the quantum well are different, such that the interface crystal quality between the quantum well and the quantum barrier of the quantum well layer can be greatly improved to enhance the luminous efficiency of the semiconductor chip.

Abstract: Embodiments of the present disclosure provide a scroll compressor. The scroll compressor includes: a fixed scroll having an end plate and a fixed scroll wrap extending from the end plate; an orbiting scroll having an orbiting scroll wrap, the orbiting scroll wrap being engaged with the fixed scroll wrap to form a plurality of compression chambers for compressing a medium; a channel formed in the end plate of the fixed scroll, the channel leading to one compression chamber of the plurality of compression chambers; and a valve provided on the end plate of the fixed scroll, and configured to open when a pressure in the one compression chamber is higher than a predetermined pressure threshold so as to allow the medium in the one compression chamber to flow out of the one compression chamber through the channel. The scroll compressor according to the embodiments of the present disclosure, for example, can improve the performance of the scroll compressor.

Abstract: An example method comprises receiving an initial topology of an electrical, receiving a selection of a region of interest, determining one or more external equivalents of the electrical network that are external to the region of interest, determining one or more internal equivalents of the region of interest, calculating a sensitivity matrix based on electrical impedances of at least one of the one or more internal equivalents and based on an amount of power exchanged when in operation, determining a subset of the sensitivity matrix as indicating highly sensitive buses, receiving historical data regarding power flows, predicting power flow for each highly sensitive buses, comparing the predicted power flow to at least one predetermined threshold to determine possible network congestion, and generating a report regarding network congestion and locations of possible network congestion in the region of interest based on the comparison.

Abstract: The disclosure provides a ventilation apparatus. The ventilation apparatus includes a housing, an inhalation branch, a control unit, a gas source port, an exhalation branch, and a paramagnetic oxygen sensor. The paramagnetic oxygen sensor is used for detecting the oxygen content in the inhalation branch. The gas source port is disposed on the housing. The inhalation branch, the control unit, and the exhalation branch are enclosed within the housing. The paramagnetic oxygen sensor is disposed outside the housing.

Abstract: A method for industrial production of a butadiene-isoprene copolymer rubber having a trans-1,4-structure (TBIR) and an apparatus for implementing the method. The production method includes: pumping a predetermined amount of a butadiene and an isoprene into a polymerization reactor, and performing bulk polymerization in the presence of a catalyst to obtain TBIR; performing extrusion, devolatilization, granulation and drying on the produced TBIR, and then packaging the produced TBIR; and separating unreacted monomers by a recovery and separation device followed by separately refining the unreacted monomers, and then returning the unreacted monomers to a batching device or a storage tank. The production apparatus has a recovery and refining unit, a polymerization unit, a post-treatment unit and a utility unit. By the production apparatus and the production method industrial production of TBIR by bulk polymerization is realized.

Abstract: An example method comprises receiving an initial topology of an electrical, receiving a selection of a region of interest, determining one or more external equivalents of the electrical network that are external to the region of interest, determining one or more internal equivalents of the region of interest, calculating a sensitivity matrix based on electrical impedances of at least one of the one or more internal equivalents and based on an amount of power exchanged when in operation, determining a subset of the sensitivity matrix as indicating highly sensitive buses, receiving historical data regarding power flows, predicting power flow for each highly sensitive buses, comparing the predicted power flow to at least one predetermined threshold to determine possible network congestion, and generating a report regarding network congestion and locations of possible network congestion in the region of interest based on the comparison.

Abstract: Provided is a method for manufacturing a semiconductor wafer and a semiconductor wafer. The method includes: disposing a sacrificial layer on a first surface and a second surface of a patterned substrate, the patterned substrate comprising the first surface and the second surface having different normal directions; exposing the first surface by removing the first portion of the sacrificial layer disposed on the first surface; growing an original nitride buffer layer on the first surface and the second portion of the sacrificial layer; partially lifting off the second portion of the sacrificial layer disposed on the second surface such that at least one sub-portion of the second portion of the sacrificial layer remains on the second surface of the patterned substrate; and growing an epitaxial layer on the original nitride buffer layer, where a crystal surface of the epitaxial layer grows along a normal direction of the patterned substrate.

Abstract: The present disclosure provides a ventilator that includes a first gas path, comprising a first pressurized gas source adaptor and a first flow adjustment device connected in sequence; a second gas path, comprising a second pressurized gas source adaptor and a second flow adjustment device connected in sequence; a third gas path, comprising a third pressurized gas source adaptor; a first inhalation branch for delivering inhalation gas to a patient; a second inhalation branch for delivering inhalation gas to the patient, including a gas compression device; a switching device, including a first mixing mode connecting the first gas path and the second gas path to the first inhalation branch, and a second mixing mode connecting the first gas path and the third gas path to the second inhalation branch; and an exhalation branch for managing exhaled air of the patient.

Abstract: Embodiments of the present disclosure provide a control method of a multimedia conference terminal and a multimedia conference server. The control method of the multimedia conference terminal includes: determining whether multimedia information of a conference site collected by the multimedia conference terminal meets a preset condition; if the multimedia information does not meet the preset condition, acquiring multimedia information of the conference site collected by the multimedia conference terminal; and if the multimedia information meets the preset condition, closing the multimedia conference terminal.

Abstract: According to at least some embodiments of the present disclosure, a method of manufacturing semiconductor wafers comprises: selectively growing a nitride buffer layer on a first surface of a patterned substrate, the patterned substrate including at least the first surface and a second surface; and growing an epitaxial layer on the nitride buffer layer, wherein a crystal surface of the epitaxial layer grows along a normal direction of the patterned substrate. The epitaxial layer does not include multiple crystal surfaces having different crystal growth directions that cause a stress at a junction interface where the crystal surfaces having the different crystal growth directions meet.