Abstract: The present invention provides an attention detection method based on a cascade neural network, a computer apparatus, and a computer-readable storage medium. The method includes: obtaining video data, recognizing a plurality of image frames, and extracting a face region of the plurality of image frames; recognizing the face region by using a first convolutional neural network to judge whether a first situation of inattention occurs; and recognizing, if it is confirmed that no first situation of inattention occurs, the face region by using a second convolutional neural network to judge whether a second situation of inattention occurs, where computational complexity of the first convolutional neural network is less than computational complexity of the second convolutional neural network. The present invention further provides the computer apparatus for implementing the foregoing method and the computer-readable storage medium.

Abstract: A precise coordination control system includes a trajectory generator, a closed-loop system of a first motion stage, and a closed-loop system of a second motion stage. The precise coordination control method includes: initializing an iteration experiment count j to 1 and feedforward control signals of two motion stages to 0; performing the jth iteration experiment and running the coordination control system; updating the feedforward control signals of the two motion stages; and continuing next iteration and stopping the iteration experiment until a coordination motion error meets a precision requirement. Both of respective servo errors of two motion stages and the coordination motion error of the two motion stages can be reduced. A learning coefficient is designed by using an adaptive method to provide an increased convergence rate, high robustness to external random disturbances, and good anti-disturbance capability.

Abstract: A laser stitch welding device, comprising: a laser welding assembly (3) configured to release laser beams from a front surface onto plates (5) to be welded that are stacked; a pressing piece (2) for adjusting a spacing between the stacked plates; detecting assembly for detecting a welding parameter of the stacked plates from a back surface; and a controller (1) for adjusting in real time the pressing level of the pressing piece (2) and/or operation parameters of the laser welding assembly (3) based on the welding parameter detected by the detecting assembly. The laser stitch welding device is capable of detecting in real time welding parameters such as back surface temperature and thermal infrared image of welding seams (6) when welding the plates. A control system controls the pressing level of the pressing piece or the operation parameters of the laser welding assembly based on the welding parameters to adjust the welding in a timely manner, thus achieving adaptive and stable control of weld penetration.

Abstract: Methods, systems, and devices for wireless communication are described. A base station may determine a mapping configuration for antenna ports that includes mapping antenna ports with high spatial correlation to frequency resource and mapping antenna ports with low spatial correlation to time resources. The base station may apply a common coding mechanism to channel state information reference signals (CSI-RSs) having a timing domain and transmit the CSI-RSs using antenna ports with high frequency separation. A user equipment (UE) may receive the CSI-RS on the channel and identify a joint correlation metric based on a frequency correlation and a spatial correlation between CSI-RS and the channel. The UE may determine a channel estimate for the channel based on the joint correlation metric.

Abstract: The present disclosure provides an ultraviolet LED epitaxial production method and an ultraviolet LED, where the method includes: pre-introducing a metal source and a group-V reactant on a substrate, to form a buffer layer through decomposition at a first temperature; growing an N-doped AlwGa1-wN layer on the buffer layer at a second temperature; growing a multi-section LED structure on the N-doped AlwGa1-wN layer at a third temperature, wherein a number of sections of the multi-section LED structure is in a range of 2 to 50; and each section of the LED structure comprises an AlxGa1-xN/AlyGa1-yN multi-quantum well structure and a P-doped AlmGa1-mN layer, and the multi-section LED structure emits light of one or more wavelengths, which realizes that a single ultraviolet LED emits ultraviolet light of different wavelengths, thereby improving the luminous efficiency of the ultraviolet LED.

Abstract: A UV sterilization device for a container includes a housing, a base, a receiving room formed between the housing and the base, a transmission member symmetrically and rotatably mounted on the base and including a clamp for clamping the container, an extension rod symmetrically mounted on the base and inserting into the container to stretch out and draw back relative to the container along the axial direction of the extension member, a UV sterilization member mounted on the extension member to move with the extension member, and a driving member fixed with the base and including a motor therein. The motor is fixed with the transmission member and the extension member. The motor can drive the transmission member and the container to rotate, and drive the extension member to stretch out and draw back relative to the container along the axial direction of the extension member to further drive the UV sterilization member to disinfect the container.

Abstract: A molecular marker combination linked to quantitative traits of tea plant caffeine content, including a SNP site 1, a SNP site 2, a SNP site 3, a SNP site 4, a SNP site 5 and a SNP site 6, which are located in tea genomes Scaffold4239:309117, Scaffold115:803980, Scaffold720:596655, Scaffold3614:66549, Scaffold349:3413816 and Scaffold920:281727, respectively, and genotypes thereof are extremely significantly correlated with the caffeine content is provided. A detection method for detecting each site, and one or more molecular marker site is used to evaluate the tea plant caffeine content.

Abstract: A molecular marker combination linked to quantitative traits of tea plant (+)-catechin content, including a SNP site 1, a SNP site 2, a SNP site 3, a SNP site 4, a SNP site 5, a SNP site 6, a SNP site 7 and a SNP site 8, which are located in tea genomes Scaffold4239:309117, Scaffold3614: 66549, Scaffold349: 3413816, Scaffold1989: 2316385, Scaffold451: 940283, Scaffold3727:442660, Scaffold115:803980 and Scaffold920:281727, respectively, and genotypes thereof are extremely significantly correlated with the (+)-catechin content is provided. A detection method for detecting each site, and one or more molecular marker site is used to evaluate the tea plant (+)-catechin content.

Abstract: A length adjuster on a wearable device includes an arc-shaped shell and a length fine-adjustment mechanism. A first connection rack, a second connection rack, a gear, a button and a return spring of a gear shaft are provided in the arc-shaped shell. The first connection rack, the second connection rack and the gear are meshed with one another. The gear shaft is connected to a clockwork spring mechanism. The gear shaft and the length fine-adjustment mechanism are in a clutch connection. A unidirectional rotation-prevention structure is provided in the length fine-adjustment mechanism, and the unidirectional rotation-prevention structure allows the length fine-adjustment mechanism to drive the gear shaft to rotate in a rotation direction for enabling a clockwork spring to be stretched, and prevents the gear shaft from rotating in the direction opposite to the rotation direction. The length adjuster is provided with a release mechanism.

Abstract: This document describes a multiple hypothesis-based data fusion tracker. Each hypothesis aligns to a different pseudo measurement type. The fusion tracker automatically determines, using a predefined error covariance associated with the radar, which pseudo measurement type has a greater chance of being accurate for a current situation. The fusion tracker may rely on either one of two combined radar and vision calculations, or the fusion tracker may ignore the vision-based pseudo measurements and instead, rely on radar pseudo measurements alone. By selecting between three different bounding boxes, a vision angle based box, a vision lateral position based box, or a radar only based box, the fusion tracker can balance accuracy and speed when drawing, repositioning, or resizing bounding boxes, even under congested traffic or other high volume situations.

Abstract: Described herein are CD73 inhibitors and pharmaceutical compositions comprising said compounds. The subject compounds and compositions are useful for the treatment of cancer, infections, and neurodegenerative diseases.

Abstract: A method for controlling a cooking apparatus includes counting a number of times that an operation temperature of the cooking apparatus exceeds a set temperature within a previous set duration, updating a control parameter corresponding to a current set duration based on the number of times, and controlling a heating device of the cooking apparatus to heat within the current set duration based on the updated control parameter.

Abstract: Provided are an antibody targeting NKG2A, a preparation method therefor and use thereof. Specifically, provided is a new mouse or humanized monoclonal antibody targeting NKG2A, and a method for preparing the monoclonal antibody. The monoclonal antibody can bind to an NKG2A antigen with high specificity, and has high affinity and significant activities such as anti-tumor activity.

Abstract: Methods and systems are described that enable radar detection prioritization based on downstream feedback. As a vehicle is traveling in a travel corridor, radar detections are received by a processor and feedback related to a downstream function is received from another processor that is executing the downstream function. For the radar detections that are determined to be within the travel corridor, respective priorities are assigned based on locations of the radar detections and the feedback related to the downstream function. The radar detections with the assigned priorities are then stored in a detection buffer along with indications of their respective assigned priorities. In this way, the detection buffer may be optimized for the downstream function by filtering out certain detections and prioritizing others. Consequently, computational loads on the downstream function are reduced while ensuring that important detections are received by the downstream function early.

Abstract: In one embodiment, a method receives a set of frames from a video at a first classifier. The first classifier classifies the set of frames with classification scores that indicate a confidence that a frame contains end credit content using the first classifier using a first model that classifies content from the set of frames. A second classifier then refines the classification scores from neighboring frames in the set of frames using a second classifier using a second model that classifies classification scores from the first classifier. A boundary point is selected between a frame in the set of frames considered not including end credit content and a frame in the set of frames including end credit content based on the refined classification scores.

Abstract: The present disclosure discloses a process for producing microcrystalline alpha-alumina by microwave calcination, which relates to the production process of calcined alumina. The product of the present disclosure has stable quality. The yield of the process of the present disclosure is higher than that of the traditional kiln production method. The energy consumption during the preparation of alpha-alumina is greatly reduced, and the zero emission of harmful gases is realized.

Abstract: This document describes target curvature estimation considering vehicle dynamics constraints. Some vehicle dynamics models use several kinematic states to predict the paths of targets identified by an object-tracking system. Rather than rely on predetermined industry measurements as the kinematic inputs to a model, an example system instead estimates some of these states using near real-time data output from a tracking filter. This can include estimating position and velocity states, as well as curvature and centripetal acceleration states. The example system is particularly suited at accurately predicting the curvature and centripetal acceleration states, which greatly improves the accuracy of the object-tracking system, and further improves safety in avoiding a target collision.

Abstract: A method for preparing an aerogel comprising nano attapulgite and phenolic aldehyde and a method for preparing abrasion-resistant vehicle tire. 80-100 weight distributions of rubber, 3-8 weight distributions of SiO2.nH2O, 3-6 weight distributions of an anti-aging agent, 3-4 weight distributions of a heat stabilizer, 3-5 weight distributions of a compatibilizing agent, and 3-12 weight distributions of the aerogel comprising the nano attapulgite and the phenolic aldehyde is selected as a raw material of the abrasion-resistant rubber material to prepare rubber composite material for the abrasion-resistant vehicle tire.

Abstract: A running deck assembly and a treadmill are provided. The running deck assembly includes: a front running deck; a rear running deck, wherein a front end face of the rear running deck abuts a rear end face of the front running deck; a flexible layer, laid on an upper surface of the front running deck and an upper surface of the rear running deck; and an annular running belt, rotatably mounted around the front running deck and the rear running deck with a clearance.

Abstract: Method for constructing a continuous design space for generating a physical property model in a faulted subsurface medium. The matching relationship of the fault traces on the two sides of each fault is used in a systematic way to determine the location of the fault traces in the design space. The location of any other point in the design space may then be determined by interpolation of the locations of fault traces. The fault traces are thus used as control points for the mapping. The method involves: (a) identifying the control points and determining their location in both physical and design space and (b) using selected control points, mapping any point from physical space to design space, preferably using the moving least squares method.