Abstract: A method is provided for manufacturing flooring planks including a plastic base and an image plastic layer. The method includes a feeding step of feeding a layered raw material of a long decorative material to be rolled into oppositely rolling rollers; and a rolling step of hot rolling an embossing on the transparent plastic layer. A feeding tension of a printed plastic layer is adjusted according to a longitudinal deviation between the embossing and the pattern in the rolling step. The device includes a first feeding device, a second feeding device, the oppositely rolling rollers, a detecting device, and a tension controller disposed on the second feeding device. According to the long decorative material with the embossing in register with the pattern manufactured by the method, the embossing hot-rolled on the transparent plastic layer is in register with the pattern on the printed plastic layer.

Abstract: A synchronisation system comprises aa sensor arrangement to detect a trigger base event. An analysis module and an arithmetic unit are configured to access prior information on a time delay between the sensor arrangement's detection of the trigger base and a starting point of an acquisition time interval for acquiring imaging data. The starting point is computed of the acquisition time interval from the detected trigger base event and the prior information of the time delay. The time delay between the sensor arrangement's detection of the trigger base event and the acquisition time interval may vary between individual subjects, but for each individual subject the time delay is well reproducible and hence on a per subject basis may be calibrated for.

Abstract: A method (100) is disclosed for determining a signal indicative of a state of a subject during a diagnostic imaging or therapeutic procedure based on camera observation. The method comprises acquiring (101) camera images from a camera configured to monitor a body part of the subject during the procedure, e.g. via a reflection thereof in a reflective surface. The method comprises detecting (102) a shape or contour of the reflective surface in at least one acquired camera image to define a region of interest in the image that contains image information corresponding to the body part of interest, and segmenting (103) the region of interest in one or more camera images to select pixels that correspond to a feature of the body part of interest. The method also comprises determining (105) the signal indicative of the state of the subject from the selection. The invention further relates to a corresponding device, system and computer-program.

Abstract: A method for predicting mass of heavy vehicles based on networked operating data and machine learning includes: collecting operating data; extracting speed, engine output torque, satellite elevation, and gear position under a driving condition; determining a transmission ratio of the heavy vehicle based on the gear position; filtering the speed, engine output torque, and the satellite elevation using three of the plurality of filtering parameters; determining a filtered vehicle longitudinal acceleration under the driving condition using the filtered speed, and one of the plurality of filtering parameters; determining a filtered road gradient sine value under the driving condition using the filtered speed, satellite elevation, and one of the plurality of filtering parameters; and inputting the speed, engine output torque, vehicle longitudinal acceleration, road gradient sine value, and transmission ratio into a vehicle mass prediction model to obtain a predicted mass.

Abstract: The present invention discloses a near-field broadband uplink MIMO transmission method assisted by a dynamic metasurface antenna. The method includes: Broadband signals sent by a plurality of users distributed in a near-field region are processed with a large-size dynamic metasurface antenna as a receive antenna on a base station side, which can reduce system hardware costs and power consumption; and compared with the current hybrid beamforming based on a phase shifter and a conventional antenna, hybrid beamforming based on the dynamic metasurface antenna can effectively improve transmission performance. The present invention proposes an algorithm framework jointly designing a dynamic metasurface antenna and a baseband beamformer and including method such as matrix-weighted mean square error sum (MWMSE) minimization, alternate optimization, matrix vectorization, and MM.

Abstract: A vital sign detection system comprises a camera (10) configured to acquire image frames from an examination zone (42). A signal processor (11) derives vital sign information from the acquired image frames. An illumination controller (12) controls illumination of the examination zone, generates temporal modulations of the illumination and synchronise the camera frame rate with the modulated illumination. The vital sign detection system of the invention achieves to increase the dynamic range and hence also the signal-to-noise ratio of the vital sign signal.

Abstract: Disclosed is a transmit method based on satellite massive Multiple-Input Multiple-Output (MIMO) integrated sensing and communication, where a satellite end is equipped with a massive MIMO array to implement an integrated sensing and communication system. The satellite end sends a communication signal to multiple user terminals based on statistical properties of electromagnetic wave propagation, and detects multiple targets simultaneously, thus realizing simultaneous communication of the satellite end with the user terminals and sensing for the targets. The present disclosure fully utilizes the spectrum resources, implements a flexible switch between wireless communication and target sensing functions based on a satellite, and mitigates the effects of the beam squint on system performance, thus greatly improving communication performance and radar resolution and being applicable for construction of an integrated network of space, air, ground and sea to achieve global coverage.

Abstract: The present invention relates to a device (200), system (500) and method for determining a vital sign (150) of a subject (1) by using high dynamic range techniques to overcome the problems arising from a non-homogenous illumination of the subject (1). A camera (100) is preferably alternately switched between a mode of a high exposure time and a low exposure time to continuously record electromagnetic radiation (10) transmitted through or reflected from a skin area (4, 6) including one or more skin pixels of the subject (1). A plurality of detection signals (110), each representing a time signal derived from the electromagnetic radiation (10) are then further processed by various method steps, such as selecting high-quality skin-pixels from the different exposure states for signal extraction, interpolating and combining different exposure signals for vital signs extraction to increase the number of skin pixels for a more accurate vital sign extraction.

Abstract: The present invention discloses a large-scale MIMO satellite mobile communication method and system. A satellite or gateway station uses spatial angle information of user terminals to group the users to be served in the coverage area to form space division user groups, wherein the user terminals in the same group use the same time-frequency resources to communicate with the satellite, while the user terminals in different groups use different time-frequency resources to communicate with the satellite. For the user terminals in the same space division user group, the satellite or gateway station uses statistical channel information of each user terminal to calculate a downlink precoding vector and an uplink receiving processing vector corresponding to each user terminal, and then uses the obtained vectors to perform downlink precoding transmission and uplink received signal processing.

Abstract: In a method for processing a document image, a document image to be processed is acquired. Text nodes of multiple granularities, visual nodes of multiple granularities, respective node information of the text nodes, and respective node information of the visual nodes in the document image are obtained. A multi-granularity and multi-modality document graph is construct based on the text nodes of multiple granularities, the visual nodes of multiple granularities, the respective node information of the text nodes and the respective node information of the visual nodes. Multi-granularity semantic feature information of the document image is determined based on the multi-granularity and multi-modality document graph, the respective node information of the text nodes and the respective node information of the visual nodes.

Abstract: A large-scale MIMO (Multiple-Input Multiple-Output) wireless transmission method for millimeter wave/Terahertz networks is provided. In order to reduce the interruption of propagation in the millimeter wave/Terahertz band, a plurality of cells are combined into a wireless transmission network, the base station in each cell is equipped with a large-scale antenna array, and a unitary transformation matrix is used to achieve large-scale beam coverage for user terminals in the entire network. Moreover, in order to reduce the influence of the multipath and Doppler effects on transmission performance, received signals are synchronized for time and frequency in each receiving beam of a user terminal. The method allocates power for signal transmission according to the statistic information of synchronized equivalent channels, and gives an optimal power allocation matrix by iterative solution based on the CCCP (concave-convex procedure) and the deterministic equivalent method.

Abstract: A large-scale MIMO (Multiple-Input Multiple-Output) wireless transmission method for millimeter wave/Terahertz networks is provided. In order to reduce the interruption of propagation in the millimeter wave/Terahertz band, a plurality of cells are combined into a wireless transmission network, the base station in each cell is equipped with a large-scale antenna array, and a unitary transformation matrix is used to achieve large-scale beam coverage for user terminals in the entire network. Moreover, in order to reduce the influence of the multipath and Doppler effects on transmission performance, received signals are synchronized for time and frequency in each receiving beam of a user terminal. The method allocates power for signal transmission according to the statistic information of synchronized equivalent channels, and gives an optimal power allocation matrix by iterative solution based on the CCCP (concave-convex procedure) and the deterministic equivalent method.

Abstract: The invention discloses a beam domain optical wireless communication method and system. A base station is equipped with an array of optical transceiver ports or transmitter/receiver ports and a lens, each optical transceiver port forms a beam with centralized energy through the lens, and the base station generates beams in different directions by using the optical transceiver port array and the lens, thereby realizing multi-beam coverage or large-scale beam coverage in a communication region. The base station transmits/receives signals of multiple or a large number of user terminals by using channel state information of each user terminal, and different optical transceiver ports transmit/receive signals in different directions, thereby realizing simultaneous communication and bidirectional communication between the base station and different user terminals.

Abstract: The present invention discloses a large-scale MIMO satellite mobile communication method and system. A satellite or gateway station uses spatial angle information of user terminals to group the users to be served in the coverage area to form space division user groups, wherein the user terminals in the same group use the same time-frequency resources to communicate with the satellite, while the user terminals in different groups use different time-frequency resources to communicate with the satellite. For the user terminals in the same space division user group, the satellite or gateway station uses statistical channel information of each user terminal to calculate a downlink precoding vector and an uplink receiving processing vector corresponding to each user terminal, and then uses the obtained vectors to perform downlink precoding transmission and uplink received signal processing.

Abstract: The invention discloses a beam domain optical wireless communication method and system. A base station is equipped with an array of optical transceiver ports or transmitter/receiver ports and a lens, each optical transceiver port forms a beam with centralized energy through the lens, and the base station generates beams in different directions by using the optical transceiver port array and the lens, thereby realizing multi-beam coverage or large-scale beam coverage in a communication region. The base station transmits/receives signals of multiple or a large number of user terminals by using channel state information of each user terminal, and different optical transceiver ports transmit/receive signals in different directions, thereby realizing simultaneous communication and bidirectional communication between the base station and different user terminals.

Abstract: The present invention relates to a device, system and method for image segmentation of an image of a scene including a subject. To improve the segmentation, the device comprises a receiver (210) configured to receive electromagnetic radiation reflected from a scene including a subject, a polarization unit (220) configured to apply a first polarization on the received electromagnetic radiation to generate first polarized radiation and to apply a second polarization, which is different from the first polarization, on the received electromagnetic radiation to generate second polarized radiation, a sensor unit (230) configured to generate a first image from the first polarized radiation and a second image from the second polarized radiation, and a segmentation unit (250) configured to identify areas of different materials in the scene from a combination of the first and second images.

Abstract: The present invention relates to a device, system and method for skin detection. To enable a reliable, accurate and fast detection the proposed device comprises an input interface (30) for obtaining image data of a scene, said image data comprising a time sequence of image frames, an extraction unit (31) for extracting a photoplethysmography (PPG) signal from a region of interest of said image data, a transformation unit (32) for transforming said PPG signal into a spectral signal, a sorting unit (33) for sorting said spectral signal to obtain a sorted spectral signal representing a descriptor, and a classifier (34) for classifying said region of interest as skin region of a living being or as non-skin region based on the descriptor.

Abstract: A method, a device, a client apparatus, and an electronic device for presenting webpages are disclosed. The method comprises: receiving webpage data; obtaining, based on page presentation-related interface information in the webpage data, corresponding interface elements of a local application; and at least partially using the interface elements of the local application to present a webpage of the webpage data. User experience can be improved according to some embodiments of the present disclosure.

Abstract: Signal transmitting/receiving electronic devices or terminals in the present disclosure are configured to conduct per-beam signal synchronization in massive MIMO communication with a signal receiving/transmitting device or base station. During the massive MIMO communication, the devices or terminals are configured to transmit/receive signals via a set of beams to or from the signal receiving/transmitting device or base station. For beam domain signal of each individual beam of the plurality beams, the devices or terminals are configured to determine target time adjustments based on time shifts of the beam domain signals induced by multipath effect and target frequency adjustments based on frequency offsets of the beam domain signals induced by the Doppler effect; adjust time independent variables of the beam domain signals by the time adjustments; and adjust frequency independent variables of the beam domain signals by the frequency adjustments.

Abstract: According to an aspect, there is provided an apparatus for determining a pulse signal from a video sequence, the apparatus comprising a processing unit configured to obtain a video sequence, the video sequence comprising a plurality of image frames; form a plurality of video sub-sequences, each video sub-sequence comprising a frame segment from each image frame in a subset of the image frames, wherein each image frame is divided into a plurality of frame segments; for a first video sub-sequence formed from frame segments from a first subset of image frames, comparing a representative value for the first video sub-sequence to representative values for video sub-sequences formed from frame segments from a second subset of image frames; concatenate the first video sub-sequence to a second video sub-sequence formed from frame segments from the second subset of image frames based on the comparison of representative values; and determine a pulse signal from the concatenated video sub-sequences.