Abstract: The embodiments of the present disclosure disclose a method for uplink multiuser data transmission and a system for uplink multiuser multiple input multiple output. The method includes: sending, by an access point AP, indication information to at least two stations STAs, wherein the indication information is used for indicating that the at least two STAs perform an uplink multiuser data transmission; receiving, by the AP, uplink data sent by the at least two STAs through channels from the at least two STAs to the AP, respectively; and demodulating, by the AP, the uplink data sent by the at least two STAs using receiving beams corresponding to pre-estimated channels from the at least two STAs to the AP, respectively.

Abstract: In the method, an access point AP receives action information separately reported by N stations STAs, where N pieces of action information are used to determine a training result of a first neural network of each STA, and N is a positive integer. The AP determines the training result of the first neural network of each STA based on the N pieces of action information, and sends the training result of the first neural network of each STA to the corresponding STA. The training result of the first neural network of each STA is determined based on the action information reported by the N STAs, instead of only the action information of the STA. This can improve a prediction capability of the first neural network, help improve a capability of each STA to predict channel access behavior of another STA, and improve a system throughput and reduce a communication latency.

Abstract: An uplink multi-user multi-input multi-output establishment method includes broadcasting, by a network side device, an uplink data sending announcement; receiving buffer information sent by a terminal that needs to send data, where the buffer information includes at least a sending level and a data sending length of to-be-sent data; determining, according to the buffer information, scheduling information for establishing uplink multi-user multi-input multi-output; and sending, to a terminal that is allowed to send data and selected from the terminal that needs to send data, a clear to send frame that carries the scheduling information, so that the terminal that is allowed to send data sends the to-be-sent data according to the scheduling information. The embodiments of the present disclosure effectively implement uplink multi-user multi-input multi-output establishment, so that signaling interworking is reduced, resource overheads are reduced, and data sending efficiency is improved.

Abstract: A device for separating and recovering flat-plate catalyst powder and a method for determining a wear ratio are provided. The device includes a powder separation unit and a powder recovery unit, a powder accumulation bin is respectively connected with a shell and a catalyst powder outlet, a cyclone outlet is configured on an inner side of a recovery shell, and a primary filter and a secondary filter are configured on an inner side wall of the recovery shell.

Abstract: A data display method and an apparatus. The method includes: obtaining, from a first device, an object parameter and a service forecast quantity of a first object in a first service unit, and an available quantity of the first object; determining a first replenishment quantity for making replenishment for the first object in the first service unit according to the object parameter and the service forecast quantity; and determining a second replenishment quantity for replenishment that needs to be made for the first object in the first service unit according to the available quantity and the first replenishment quantity, and displaying the second replenishment quantity, which is used to improve an efficiency of making replenishment for the first object in the first service unit.

Abstract: This disclosure relates to analysing rock falls. A video camera captures video data, a depth measurement system captures depth data, a seismic sensor captures seismic data, and a data store stores spatial characterising data of the rock fall site. A processor detects a rock fall source location based on the video data, depth data, seismic data; determines a three-dimensional free fall estimation based on the rock fall source location; estimates three-dimensional bounce kinematics based on the three-dimensional free fall estimation and the spatial characterising data of the rock fall site; estimates a runout based on the rock fall source location, free fall and bounce kinematics; and combines the rock fall source location, the three-dimensional free fall, the three dimensional bounce kinematics and the runout to determine a rock fall trajectory.

Abstract: A radio frequency transmitter is provided. The radio frequency transmitter includes a radio frequency front-end and a control circuit. The radio frequency front-end includes a current source set, a compensation circuit, and a matching network. The compensation circuit may compensate for a difference of load impedance between N current source subsets in the current source set. Therefore, an impedance mismatch of the current source set may be alleviated, and a power loss of the current source set may be avoided. This helps improve the efficiency of the radio frequency transmitter.

Abstract: Embodiments of this application provide a capacitor unit, an integrated capacitor, and a resonance unit. The capacitor unit includes: a conductive cavity, where an accommodation space is set longitudinally through in the conductive cavity; and a conductive core, where a first part of the conductive core and a second part of the conductive core are connected by using a via hole, the first part of the conductive core is located above or below the conductive cavity, and the second part of the conductive core is located in the accommodation space of the conductive cavity; and the conductive cavity is isolated from the conductive core by using an oxide layer or an insulation layer. The embodiments of this application can reduce impact from the outside on the capacitor unit, and therefore stability of the capacitor unit can be improved.

Abstract: A method for data retrieval is described. Interface circuitry of an information processing apparatus receives a request for data retrieval from a database. The database stores content sharing information in a social network. The request includes a first user identifier and a first link identifier. The processing circuitry determines whether the first user identifier and the first link identifier are associated in the database as a consequence of a previous sharing of a first article corresponding to the first link identifier using the first user identifier. Further, when the first user identifier and the first link identifier are determined to be associated, the processing circuitry searches for a first message identifier in the database. The first message identifier identifies a first message that includes information of the previous sharing of the first article. The processing circuitry then retrieves the first message according to the first message identifier.

Abstract: The present disclosure relates to polar phased-array transmitter and mobile terminals. One example mobile terminal includes a polar phased-array transmitter and an antenna array. The polar phased-array transmitter is configured to generate n amplitude signals and n phase signals, separately perform phase modulation and phase shifting on the n phase signals by using a local oscillator signal to obtain n phase modulation signals, and perform amplitude modulation and power amplification on the n phase modulation signals by using the amplitude signals to obtain n radio frequency signals. n is a natural number greater than 1. The antenna array is configured to obtain the n radio frequency signals from the polar phased-array transmitter, and transmit the n radio frequency signals.

Abstract: A rehabilitation robot comprises an upper limb rehabilitation device comprising a shoulder width adjusting device for adjusting a shoulder width of the rehabilitation robot, a right arm device and a left arm device, the right arm device and the left arm device are disposed at two sides of the shoulder width adjusting device, respectively; and a lower limb rehabilitation device connected to the upper limb rehabilitation device.

Abstract: A dual-mode oscillator and a multi-phase oscillator includes a mode switching circuit to switch between two operating modes and obtain oscillation signals having two different bands. The dual-mode oscillator also includes two transformer-coupled oscillators with each having a step-up transformer. The step-up transformer multiplies a drain voltage swing of a first metal oxide semiconductor (MOS) transistor and then injects a voltage signal to a gate of a second MOS transistor to obtain a larger gate voltage swing without increasing a supply voltage of the oscillator. The dual-mode oscillators are coupled through multi-phase coupled circuits to form a Mobius loop.

Abstract: A filter is provided, and the filter includes two mutually coupled slow-wave resonators. Each resonator includes a coplanar waveguide (CPW) transmission line, a tapered CPW transmission line, and a ground stub, and can generate a slow-wave feature to push a high-order harmonic wave of a baseband signal to a high frequency, so as to implement a wide stopband feature. In addition, a slow-wave effect is used to properly design a size of a filter, to reduce an entire area of the filter and reduce costs. Moreover, two resonators are coupled, to enhance passband performance of the filter, increase bandwidth, increase in-passband flatness, and reduce an insertion loss.

Abstract: A polar transmitter includes an amplitude path comprising an amplitude signal that corresponds to an amplitude of a vector sum of an in-phase input signal and a quadrature input signal; a phase path comprising a phase modulator configured to phase-modulate a phase signal that corresponds to the phase of the vector sum of the in-phase input signal and the quadrature input signal; a digital power amplifier (DPA) configured to amplify the phase-modulated (PM) input signal based on the amplitude signal; a tunable matching network coupled to an output of the DPA and configured to adjust a load impedance of the DPA; and a controller configured to adjust the matching network based on a look-up table with respect to amplitude and frequency information, where the look-up table indicates a plurality of optimal operation modes of the matching network for specific combinations of amplitude and frequency information.

Abstract: A dual-mode oscillator and a multi-phase oscillator includes a mode switching circuit to switch between two operating modes and obtain oscillation signals having two different bands. The dual-mode oscillator also includes two transformer-coupled oscillators with each having a step-up transformer. The step-up transformer multiplies a drain voltage swing of a first metal oxide semiconductor (MOS) transistor and then injects a voltage signal to a gate of a second MOS transistor to obtain a larger gate voltage swing without increasing a supply voltage of the oscillator. The dual-mode oscillators are coupled through multi-phase coupled circuits to form a Mobius loop.

Abstract: The present disclosure relates to polar phased-array transmitter and mobile terminals. One example mobile terminal includes a polar phased-array transmitter and an antenna array. The polar phased-array transmitter is configured to generate n amplitude signals and n phase signals, separately perform phase modulation and phase shifting on the n phase signals by using a local oscillator signal to obtain n phase modulation signals, and perform amplitude modulation and power amplification on the n phase modulation signals by using the amplitude signals to obtain n radio frequency signals. n is a natural number greater than 1. The antenna array is configured to obtain the n radio frequency signals from the polar phased-array transmitter, and transmit the n radio frequency signals.

Abstract: A dual-mode oscillator and a multi-phase oscillator includes a mode switching circuit to switch between two operating modes and obtain oscillation signals having two different bands. The dual-mode oscillator also includes two transformer-coupled oscillators and a step-up transformer in the transformer-coupled oscillators where the step-up transformer multiplies a drain voltage swing of a first MOS transistor and then injects a voltage signal to a gate of a second MOS transistor to obtain a larger gate voltage swing without increasing a supply voltage of the oscillator. The dual-mode oscillators are connected through multi-phase coupled circuits to form a Mobius loop.

Abstract: The present invention relates to the field of communications technologies and discloses a phase shifter and a feed network. The phase shifter includes at least one phase shift component. The phase shift component includes a substrate, a microstrip coupling structure disposed on a first plane of the substrate, a microstrip transmission line connected to and coplanar with the microstrip coupling structure, and a microstrip/coplanar-waveguide coupling structure, where the microstrip/coplanar-waveguide coupling structure includes a microstrip connected to and coplanar with the microstrip transmission line, and a coplanar waveguide disposed opposite to the microstrip on the substrate and coupled with the microstrip. A phase shifter using a microstrip/coplanar-waveguide coupling structure has a small volume and costs low, thereby facilitating feed network design.

Abstract: The present disclosure relates to a polar phased-array transmitter and a mobile terminal. One example mobile terminal includes a baseband chip, the polar phased-array transmitter, and an antenna array. The baseband chip is configured to generate a quadrature digital baseband signal. The polar phased-array transmitter is configured to perform quadrature-to-polar conversion on the quadrature digital baseband signal to generate n amplitude signals and n phase signals, separately perform phase modulation and phase shifting on the n phase signals by using a local oscillator signal to obtain n phase modulation signals, and perform amplitude modulation and power amplification on the n phase modulation signals by using the amplitude signals to obtain n radio frequency signals. n is a natural number greater than 1. The antenna array is configured to obtain the n radio frequency signals from the polar phased-array transmitter, and transmit the n radio frequency signals.

Abstract: Embodiments of this application provide a capacitor unit, an integrated capacitor, and a resonance unit. The capacitor unit includes: a conductive cavity, where an accommodation space is set longitudinally through in the conductive cavity; and a conductive core, where a first part of the conductive core and a second part of the conductive core are connected by using a via hole, the first part of the conductive core is located above or below the conductive cavity, and the second part of the conductive core is located in the accommodation space of the conductive cavity; and the conductive cavity is isolated from the conductive core by using an oxide layer or an insulation layer. The embodiments of this application can reduce impact from the outside on the capacitor unit, and therefore stability of the capacitor unit can be improved.