Abstract: A method for measuring drop time of a control rod cluster integrated with a rod position measurement device is provided, wherein the method is used to measure the drop time of each control rod cluster, and includes: Si, monitoring a voltage Ua of coils in Group A to capture a rod cluster drop signal; S2, searching a point (tmax, Vmax) with a maximum drop speed or with a local maximum drop speed; S3, retroactively calculating, from tmax, an end of a time period T4 when the control rod cluster starts to drop; S4, retroactively searching, from a minimum value point of a drop reference signal DROPref, a start of the time period T4 when the drop reference signal DROPref drops from a maximum value to 33% thereof; and S5, determining, from tmax forward, a time point t6 when a drop speed of the control rod cluster is lower than 0.

Abstract: The present invention relates to the field of garbage landfill. The present invention discloses a classified landfill device and method for garbage landfills, and the problem solved by the present invention is that the device proposed in the above background absorbs metals in the garbage using a magnet, but when the surface of the magnet has absorbed a large amount of metal, the device needs to be closed to treat the metal adsorbed on the surface of the magnet. The present invention comprises a screening mechanism, crushing mechanism and discharge mechanism. According to the classified landfill device and method for garbage landfill, the second crushing knife is set at an angle to divert the falling garbage to the front and rear sides, so that the two first crushing knives and the second crushing knife cooperate to crush the garbage respectively to avoid excessive accumulation of garbage.

Abstract: This application provides a reference signal transmission method and transmission apparatus. The transmission method includes: obtaining, by a network device, reference information of a terminal device, where the reference information includes at least one of an identifier of the terminal device and scheduling information of the terminal device; determining, by the network device, a transmission parameter of a phase tracking reference signal (PTRS) of the terminal device based on the reference information, where the transmission parameter includes at least one of a sequence of the PTRS and a frequency domain position of the PTRS; and transmitting, by the network device, the PTRS with the terminal device based on the transmission parameter. According to the reference signal transmission method and transmission apparatus provided in embodiments of this application, interference to the PTRS can be randomized.

Abstract: Disclosed is a method and system for predicting a touch interaction position on a large display based on a binocular camera. The method includes: separately acquiring arm movement video frames of a user and facial and eye movement video frames of the user by a binocular camera; extracting a video clip of each tapping action from the arm movement video frames and the facial and eye movement video frames and obtaining a key frame by screening; marking the key frame of each tapping action with coordinates to indicate coordinates of a finger in a display screen; inputting the marked key frame to an efficient convolutional network for online video understanding (ECO)-Lite neural network for training to obtain a predictive network model; and inputting a video frame of a current operation to be predicted to the predictive network model and outputting a touch interaction position predicted for the current operation.

Abstract: A fluidized solidified soil based on gold tailings includes the following raw materials in parts by mass: 75 parts to 80 parts of gold tailings, 5.2 parts to 13 parts of a dispersant solution, and 9 parts to 16 parts of a solidifying material. A preparation method includes the following steps: mixing the gold tailings with the dispersant solution, and then stirring to obtain a suspension slurry of the gold tailings; and adding the solidifying material, and stirring to obtain the fluidized solidified soil. In the present disclosure, the gold tailings are used as a main material, combined with a special dispersant solution and a special solidifying material, and a fluidized solidified soil is prepared with fluidity suitable for pumping and a certain strength after hardening. The fluidized solidified soil prevents the pollution caused by gold tailings landfilling, and can be used as a filling material for various construction projects.

Abstract: A communication method, apparatus, and system. The method includes: determining a first configuration, a modulation order, and a first code rate, where the first configuration includes a mapping type, a time domain resource, and a first quantity and/or a first transmission quantity; determining a second code rate, a second quantity, and a second transmission quantity based on the first code rate, the mapping type, and the first quantity and/or the first transmission quantity; determining a valid resource of the second transport block based on the time domain resource, the second quantity, and the second transmission quantity; and sending second data to a first device based on first data, the modulation order, the second code rate, and the valid resource of the second transport block.

Abstract: This application provides a method and an apparatus for determining a phase tracking reference signal (PTRS) pattern. The method includes: A terminal device receives first scheduled bandwidth threshold information from a network device, where a first scheduled bandwidth threshold indicated by the first scheduled bandwidth threshold information meets a first condition, and the first condition is that a ratio of a total quantity of modulation symbols in a PTRS pattern determined based on the first scheduled bandwidth threshold to a quantity of subcarriers in scheduled bandwidth is less than or equal to a first threshold; and determines a PTRS pattern on one orthogonal frequency division multiplexing (OFDM) symbol in an OFDM signal based on the scheduled bandwidth threshold. In this application, the network device configures, for the terminal device, the scheduled bandwidth threshold that meets the first condition, to ensure demodulation performance of the device.

Abstract: This application discloses a signal transmission method and apparatus, to implement signal transmission by using a multi-stream DFT-s-OFDM waveform. The method includes: precoding N streams of signals based on a first codebook before sending, to obtain N1 precoded signals, where a quantity of non-zero elements in each row of the first codebook is 1, the first codebook causes a phase difference between two of the N streams of signals, and N and N1 are integers greater than 1; and sending the N1 precoded signals. A transmitting end introduces a phase offset between two transmit antenna ports in a precoding process, so that equivalent inter-stream interference is optimal after channel equalization is performed at a receiving end, to improve demodulation performance of the receiving end.

Abstract: A modulation and coding determining method and a related device, applied to a terminal device. The method includes: receiving scheduling information sent by a network device, where the scheduling information includes a modulation and coding scheme (MCS) index and an actual scheduled bandwidth; determining a modulation mode based on the MCS index; determining a coding parameter based on the modulation mode and the actual scheduled bandwidth; and performing channel coding on a signal based on the coding parameter to obtain a coded signal. The coding parameter may be determined based on the scheduling information, and coding is performed based on the coding parameter, so as to improve spectral efficiency.

Abstract: An electric valve, comprising a housing component and a valve body component, wherein the housing component is fixedly connected to the valve body component; a control component comprises a motor, and a control component is provided in an inner cavity of the housing component. With respect to the background art, the influence of moisture on the motor can be reduced.

Abstract: This application provides a reference signal transmission method and transmission apparatus. The transmission method includes: obtaining, by a network device, reference information of a terminal device, where the reference information includes at least one of an identifier of the terminal device and scheduling information of the terminal device; determining, by the network device, a transmission parameter of a phase tracking reference signal (PTRS) of the terminal device based on the reference information, where the transmission parameter includes at least one of a sequence of the PTRS and a frequency domain position of the PTRS; and transmitting, by the network device, the PTRS with the terminal device based on the transmission parameter. According to the reference signal transmission method and transmission apparatus provided in embodiments of this application, interference to the PTRS can be randomized.

Abstract: Embodiments of this application disclose a wireless communication method and an apparatus. The method includes: determining a target MCS if a current MCS exceeds a predetermined threshold, where the target MCS is an MCS less than or equal to the predetermined threshold; mapping a PTRS to one or more symbols based on the target MCS; and sending, to a terminal device, the symbol to which the PTRS is mapped. through implementation of the embodiments of this application, when the current MCS exceeds the predetermined threshold, the target MCS that is less than or equal to the predetermined threshold may be determined, so that a density of a PTRS on a time-frequency resource can be flexibly determined based on the target MCS and an association relationship between an MCS threshold and a time domain density of a PTRS, thereby helping reduce resource overheads of the PTRS.

Abstract: In an electric valve provided by the present invention, a gear reduction mechanism comprises a first ring gear, a second ring gear as well as an upper planetary gear assembly and a lower planetary gear assembly arranged in the longitudinal direction of the electric valve; at least part of the first ring gear is located in an inner cavity of a rotor member; an input gear part of the rotor member meshes with planetary gears of the upper planetary gear assembly; and the lower planetary gear assembly is rotatably connected to a transmission rod. In this embodiment, at least part of the first ring gear is located in the inner cavity of the rotor member, thereby reducing the size of the electric valve.

Abstract: This application discloses a random access method and a corresponding apparatus. The method includes: A terminal device determines, based on a measurement result of a SS/PBCH block, a random access opportunity and a random access preamble that are associated with the synchronization signal/physical broadcast channel block. The terminal device sends a random access signal based on the random access opportunity and the random access preamble. There is a correspondence between the random access opportunity and/or the random access preamble and at least one of the following: a data subcarrier spacing ?fData, or a ratio ?fData/?fRA of a random access subcarrier spacing ?fRA to the data subcarrier spacing ?fData. At least one of the random access subcarrier spacing ?fRA and the data subcarrier spacing ?fData is greater than 120 kHz. This application provides a design of a random access signal based on a large subcarrier spacing, to improve communication performance.

Abstract: This application provides a physical downlink control channel transmission method and a related apparatus. The transmission method includes: A network device sends a resource configuration, where the resource configuration indicates a time domain resource used by the network device for PDCCH sending. The network device sends a PDCCH of a first terminal device on a first time domain resource in the time domain resource used by the network device for PDCCH sending, and sends a PDCCH of a second terminal device on a second time domain resource in the time domain resource used by the network device for PDCCH sending. In this way, a terminal device needs to monitor a PDCCH only on a portion of the time domain resource used for PDCCH sending, and an increase in complexity of PDCCH monitoring of the terminal device can also be avoided.

Abstract: An inverter apparatus is disclosed in this application, which includes a plurality of protection units and a plurality of inverter units. For any protection unit, when a voltage at an input terminal of the protection unit is greater than a voltage at an output terminal of the protection unit, a path between the input terminal and the output terminal of the protection unit is in a forward conducted state; when the voltage at the output terminal of the protection unit is greater than the voltage at the input terminal voltage of the protection unit, the path between the input terminal and the output terminal of the protection unit is in a reverse cut-off state; and when a control terminal of the protection unit receives a first trigger signal, the path between the input terminal and the output terminal of the protection unit is in a reverse conducted state.

Abstract: This application discloses a method, including: determining, by a network device, at least one modulation and coding scheme (MCS) threshold; sending, by the network device to a terminal device, the at least one MCS threshold; wherein the at least one MCS threshold and a maximum MCS threshold are associated with a first MCS table corresponding to a highest modulation scheme supported by the terminal device; wherein the highest modulation scheme supported by the terminal device is 64 QAM, and the maximum MCS threshold is 29; or the highest modulation scheme supported by the terminal device is 256 QAM, and the maximum MCS threshold is 28.

Abstract: An activation assembly is configured to be assembled with a substrate and a keycap. The activation assembly includes a flexible guiding component and an elastic component. The flexible guiding component includes a covering portion, a first contact portion, and a second contact portion. The covering portion has a plurality of openings. The covering portion is configured to be mounted on the substrate. The first contact portion and the second contact portion are respectively located at two opposite sides of the covering portion. The elastic component includes a coupling portion and a plurality of support portions. The coupling portion is connected to the covering portion. The support portions are connected to the coupling portion and are respectively located in the openings.

Abstract: The present disclosure relates to signal transmission methods and apparatuses. In one example method, a transmitting end groups multiple modulation symbols into multiple groups of modulation symbols, and adds one or more preset symbols to each group of modulation symbols to obtain extended symbols. Then, the transmitting end performs second-level precoding on at least one group of extended symbols corresponding to each group of antenna ports to obtain a symbol corresponding to each antenna port in each group of antenna ports. In the second-level precoding, a dimension of a precoding matrix for each group of precoding antenna ports is related to a quantity of groups and a quantity of antenna ports included in the group of antenna ports. Finally, the transmitting end sends the symbol corresponding to each antenna port.

Abstract: This application provides a diversity communication method and apparatus, to provide a diversity transmission solution. A first device maps a plurality of modulation symbols corresponding to one transport block to a plurality of antenna ports, where a plurality of consecutive modulation symbols are mapped to one antenna port in each mapping. Then, the first device maps the modulation symbols on each antenna port to a frequency domain resource corresponding to the antenna port, and frequency domain resources corresponding to different antenna ports do not overlap.