Abstract: Methods, systems, and devices for atrial fibrillation (AFib) detection are described. A method may include acquiring physiological data collected from a user via a wearable ring device, the physiological data including temperature data and motion data, and identifying that a measurement trigger condition for AFib has been satisfied based on the temperature data satisfying a temperature threshold and the motion data satisfying a motion threshold. The method may include sampling photoplethysmogram (PPG) data for the user via the wearable ring device based on identifying satisfaction of the measurement trigger condition, and classifying one or more AFib states based on the sampled PPG data. The method may further include causing a GUI of a user device to display an indication of the one or more AFib states.

Abstract: Foam composites and methods of preparation thereof are discussed. For example, the foam composite may include a polymeric material and a particulate filler, wherein the compressive strength of the foam composite is equal to or greater than 20 psi, the density is 4 pcf to 40 pcf, and wherein the thermal conductivity is equal to or less than 0.050 W/m K. the particulate filler may include fly ash, e.g., in an amount of about of 45% to about 75% by weight with respect to the total weight of the foam composite. The foam composite may be prepared from a mixture of a polyol, an isocyanate, the particulate filler, and a liquid blowing agent having a boiling point equal to or greater than 25° C. or 30° C.

Abstract: Provided is a sand setting circulating device for wave-current tank test tailings. A sand collection device is arranged at a front end of a tail gate of a tank body for performing primary collection on a bed-load sand body with a large particle size; a sand-water separating device is arranged at a tail end of the tank body for performing sand-water separation on tail water subjected to energy dissipation so as to perform secondary collection on a suspended load sand body with a small particle size, the sand-water separating device comprising a collection barrel and a sand suction device mounted in the collection barrel; a water outlet is formed in an upper part of the collection barrel, and separated clear water flows into a clear water reservoir through a water return pipe for cyclic utilization; and a computer is arranged for intelligent control.

Abstract: Provided is a tank wave-current generation system with a rear-mounted outlet. The rear-mounted outlet and a rectifying device located below a tank are arranged, the rectifying device comprises a rectifying chamber and a built-in rectifying grid, one end of the rectifying chamber is communicated with a water collection tank, and the other end of the rectifying chamber is communicated with a bottom wall of a tank unit, an outlet in the bottom wall is located at a front end of a wave pushing direction of a wave generator, a current subjected to preliminary energy dissipation in the water collection tank is rectified into a smooth fluid through the rectifying grid and then a steady current is input into the tank, so that the current pushed by a wave pushing plate arranged on the wave generator is a steady current meeting a test requirement.

Abstract: A fingerprint unlocking method and a terminal are provided. The method may be applied to a terminal having an in-screen fingerprint detection function. When the terminal is in a screen-locked state, the terminal determines whether an operation of a user meets a preset condition. If the operation of the user meets the preset condition, a fingerprint recognition identifier is displayed on a touch display screen of the terminal. A display area of the fingerprint recognition identifier is an area in which fingerprint recognition can be performed. The method resolves a problem that the user cannot perform fingerprint unlocking because the user cannot see a position of a fingerprint detector.

Abstract: Methods, systems, and devices for blood oxygen measurement are described. A method may include receiving, via a wearable device, a first photoplethysmogram (PPG) signal for a user acquired during a time interval using a first set of PPG sensors, and receiving a second PPG signal for the user acquired during the time interval using a second set of PPG sensors that are different from the first set of PPG sensors. The method may include comparing the first PPG signal and the second PPG signal, and determining one or more blood oxygen saturation metrics for the user during the time interval based on the comparison of the first PPG signal and the second PPG signal. The method may include causing a graphical user interface (GUI) to display an indication of the one or more blood oxygen saturation metrics.

Abstract: Methods, systems, and devices for heart rate detection are described. A method for measuring heart rate for a user may include receiving physiological data associated with the user, wherein the physiological data may include photoplethysmogram (PPG) data and motion data collected throughout a first time interval via a wearable device associated with the user. The method may include determining a set of candidate heart rate measurements within the first time interval based at least in part on the PPG data, selecting a first heart rate measurement from the set of candidate heart rate measurements based on the received motion data, and determining a first heart rate for the user within the first time interval based on the selected first heart rate measurement.

Abstract: Provided is a tank wave-current generation system with a rear-mounted outlet. The rear-mounted outlet and a rectifying device located below a tank are arranged, the rectifying device comprises a rectifying chamber and a built-in rectifying grid, one end of the rectifying chamber is communicated with a water collection tank, and the other end of the rectifying chamber is communicated with a bottom wall of a tank unit, an outlet in the bottom wall is located at a front end of a wave pushing direction of a wave generator, a current subjected to preliminary energy dissipation in the water collection tank is rectified into a smooth fluid through the rectifying grid and then a steady current is input into the tank, so that the current pushed by a wave pushing plate arranged on the wave generator is a steady current meeting a test requirement.

Abstract: A facial expression editing method includes obtaining a to-be-edited image, where the to-be-edited image includes a first face image of a user; obtaining, by using a camera, a first video stream including a second face image of the user; editing the first face image of the user in the to-be-edited image based on the second face image of the user in the first video stream to obtain an edited image, where a facial expression of the user in the edited image is associated with a facial expression of the user in the first video stream.

Abstract: Methods, systems, and devices for heart rate detection are described. A method may include receiving physiological data associated with the user, where the physiological data may include motion data and temperature data collected throughout a time interval via a wearable device associated with the user. The method may include determining a condition quality metric associated with the time interval based on the received motion data and temperature data. The condition quality metric may indicate a relative quality of the physiological data collected throughout the time interval for determination of heart rate measurements. The method may include sampling photoplethysmogram (PPG) data for the user via the wearable device based on the condition quality metric satisfying a threshold metric value and a timer satisfying a first threshold time duration. The method may include determining a heart rate measurement for the user based at least in part on the sampled PPG data.

Abstract: An on-machine monitoring system for the failure state of the rotating tool and a detection method thereof are provided. The monitoring system includes a detector, a data processing controller, a tool data server, and a Hall current sensor. A tool diameter and a tool length are determined according to image sequences of a tool. A wear state and a breakage state of the tool are determined according to the tool diameter and the tool length. A spindle current signal is acquired by the Hall current sensor. And an edge chipping state and a breaking state of the tool are determined according to the spindle current signal.

Abstract: The present disclosure provides a genomics-assisted prediction method for apple fruit quality traits and disease resistance and use thereof, and belongs to the technical field of plant genetics, genomics and breeding. The method is achieved by molecular markers. There are a total of 319 molecular markers, including 318 single-nucleotide polymorphism (SNP) markers and 1 InDel marker; and the molecular markers are associated with 16 traits of the Malus genus, including fruit ripening date, fruit shape, fruit cover color degree, fruit weight, soluble solid content, fruit juice pH value, malate content, chlorogenate content, procyanidin B2 content, flesh firmness at harvest, flesh crispness at harvest, flesh firmness retainability, flesh crispness retainability, fruit ring rot disease resistance, Glomerella leaf blotch resistance, and spur tree architecture.

Abstract: An ultrasound-assisted simulated digestion method of a milk protein active peptide and an application thereof in health foods, pertaining to the technical field of intensive processing of dairy products and preparation of health foods. The method firstly employs ultrasonic pretreatment of casein and ?-lactoglobulin, followed by enzymatic hydrolysis with a protease to prepare casein and ?-lactoglobulin polypeptide, and traces the activity of the polypeptide by simulating gastrointestinal digestion, and then simulates absorption by intestinal epithelial cells with Caco-2 cells, to characterize a highly active milk protein polypeptide digested by the gastrointestinal tract and absorbed by the Caco-2 cells simulating absorption by the inner wall of the small intestine. The method has identified five such highly active milk protein polypeptides.

Abstract: This application discloses a communication method and a communications apparatus. The method includes: determining, by a first device, a phase tracking reference signal PTRS pattern, where the PTRS pattern includes one or more PTRS chunks, and each PTRS chunk includes one or more PTRS samples; and mapping, by the first device, a PTRS to one or more symbols, and sending the one or more symbols to a second device.

Abstract: A method and system for building a thermal model of a power lithium-ion battery based on an electrochemical mechanism. The method includes: discretizing a second order partial differential heat conduction equation of a power lithium-ion battery according to a finite differential method, thereby building a thermal model of the power lithium-ion battery; carrying out a dynamic working condition test by using a cylindrical power lithium-ion battery selected as an object, thereby acquiring experimental data such as a temperature, a current, a voltage, and a temperature of a surface of the battery; identifying an electrochemical parameter of the power lithium-ion battery according to an optimal parameter algorithm by using test data acquired in a dynamic working condition, thereby building a thermal model of the power lithium-ion battery; and verifying accuracy of the thermal model of the power lithium-ion battery by using test data acquired in another dynamic working condition.

Abstract: A PTRS processing method includes: receiving, by a terminal, first indication information and second indication information from a network device, where the first indication information is used to indicate a time-domain location at which a PTRS is to be sent by the terminal, and the second indication information is used to indicate an offset of an initial time-domain location to which the PTRS is mapped by the terminal; mapping, by the terminal, the PTRS to one or more DFT-s-OFDM symbols based on the first indication information and the second indication information; and sending, by the terminal, the one or more DFT-s-OFDM symbols. In this way, the PTRS mapped to the DFT-s-OFDM symbol is offset at a DFT-s-OFDM symbol level.

Abstract: Systems and methods for determining an offset of a position of a focal point of an X-ray tube is provided. The methods may include obtaining at least one parameter associated with an X-ray tube during a scan of a subject. The methods may further include determining a target offset of a position of a focal point based on the at least one parameter and a target relationship between a plurality of reference parameters associated with the X-ray tube and a plurality of reference offsets of reference positions of the focal point. The methods may further include causing, based on the target offset, a correction on the position of the focal point of the X-ray tube.

Abstract: Embodiments of the present disclosure provides methods and systems for preparing a cathode component. The method may include obtaining a three-dimensional (3D) model of the cathode component; obtaining a predetermined parameter, wherein the predetermined parameter includes at least one of a scanning direction of laser, an energy distribution of laser, an output power of laser, or a scanning speed of laser; and controlling a 3D printer to perform, based on the 3D model and the predetermined parameter, a laser scanning on a raw material to obtain the cathode component.