Abstract: Disclosed is a bubbling humidifier suitable for high-flow fuel cell test equipment, comprising an upper and lower tank, an aeration device and an anti-boiling device; wherein the upper tank and the lower tank are connected and the aeration device and the anti-boiling device are arranged inside the tank. The present disclosure adopts a bubbling humidifier suitable for a high-flow rate fuel cell test equipment, which uses circulating water to complete humidification of gas. effectively improving humidification while reducing humidifier dimensions, lowering production costs, and facilitating widespread adoption; the design of water inlet and water outlet pipelines slows down the flow of circulating water in the tank, reduces the disturbance of circulating water to gas, and improves the stability of the humidifier; the design of the anti-boiling device effectively prevents the water from rushing out of the tank when the gas flow rate is too high.

Abstract: A data communication method and a related apparatus are provided, and the data communication method includes: constructing, by an access device, a beacon frame, where the beacon frame includes a newly added field, and the newly added field represents multiple data guard interval lengths supported by the access device; and broadcasting, by the access device, the beacon frame, so that a terminal selects an available guard interval length matching a data guard interval length supported by the terminal from the beacon frame, and performs data communication with the access device by using the available guard interval length. By using the present invention, data communication between the access device and the terminal can be implemented when the access device supports multiple data guard interval lengths.

Abstract: Methods and systems for automatically adjusting a sample position in a spectrometer, such as a Fourier-transform infrared (FTIR) spectrometer, are described. The sample may be automatically positioned using an auto-focusing procedure. For example, images including an aperture marker are acquired by directing light towards the sample via an aperture. The sample position may be adjusted based on features extracted from the aperture marker images.

Abstract: A sensing method includes determining, by a first communication apparatus, first information. The first information indicates a pulse repetition interval (PRI). The sensing method also includes sending, by the first communication apparatus, the first information to a second communication apparatus. The first information is used by the second communication apparatus to send a reference signal, and a periodicity of the reference signal in time domain is less than or equal to the PRI. The sensing method further includes receiving, by the first communication apparatus, the reference signal from the second communication apparatus. The sending method additionally includes sensing, by the first communication apparatus, a to-be-sensed target based on the reference signal.

Abstract: A data transmission method includes: generating a first data packet, where a signaling field in the first data packet includes bandwidth information and space-time stream information, the bandwidth information is used to indicate first bandwidth, and the space-time stream information is used to indicate k first space-time stream quantities corresponding to k receive ends, where k?1; and sending the first data packet to the k receive ends, where a maximum value of the first bandwidth is greater than 160 MHz, and/or the k first space-time stream quantities meet a preset condition, where the preset condition includes: when k=1, a maximum value of the first space-time stream quantity indicated by the space-time stream information is greater than 8, and when k>1, a maximum value of a sum of the k first space-time stream quantities is greater than 8.

Abstract: This application discloses a method includes: determining a first frequency domain resource, where frequency baselines formed by the first frequency domain resource meet a P-level redundancy distribution. Sending a sensing signal on the first frequency domain resource. The P-level redundancy distribution meets a first condition and a second condition. The first condition includes: The frequency baselines formed by the first frequency domain resource include a frequency baseline of a first length; and the first length is k*length of a minimum frequency baseline, k is a positive integer belonging to [1, K], K is a ratio of a length of a maximum frequency baseline to the length of the minimum frequency baseline. The second condition includes: In the frequency baselines formed by the first frequency domain resource except largest (P?1) and smallest (P?1) frequency baselines, a quantity of redundancy distribution times is greater than or equal to P.

Abstract: This application provides a data processing method and apparatus, and relates to the field of data compression. The method includes: obtaining to-be-compressed data; sequentially performing n times of preset processing on the to-be-compressed data to obtain preprocessed data, where the preset processing includes: performing a differential operation on rows of a to-be-operated matrix, or performing a differential operation on columns of the to-be-operated matrix, where the to-be-operated matrix is a matrix obtained through a previous time of the preset processing, or the to-be-operated matrix is a matrix formed by the to-be-compressed data; and compressing the preprocessed data through entropy encoding, to obtain compressed data.

Abstract: A data transmission method and apparatus are disclosed, to help reduce quantization loss of data that is not uniformly distributed, thereby improving data transmission efficiency. The method includes: selecting a target data distribution model from a plurality of data distribution models based on to-be-compressed data, the plurality of data distribution models, and a first uniform quantizer; determining target compressed data based on the target data distribution model; and sending the target compressed data and first information to a receive end, where the first information includes information identifying the target data distribution model.

Abstract: The provided is a torsional guided wave-based blood viscoelasticity measurement device and method using a capillary metal tube. The device includes a housing, a capillary metal tube, a signal receiving module, and a signal excitation module, where the capillary metal tube is disposed inside the housing and configured to hold a blood sample; the signal excitation module is disposed at one end of the capillary metal tube and includes a cuboid permanent magnet and an electrode; the signal receiving module is disposed at the other end of the capillary metal tube and includes a cylindrical permanent magnet and a receiving coil; an excitation is performed on the capillary metal tube to generate a torsional guided wave; when a fluid viscosity in the tube changes, energy attenuation of the guided wave propagating along the tube differs; and the guided wave energy attenuation is defined to reflect a relative blood viscosity.

Abstract: An example method includes: A first communication apparatus and a second communication apparatus determine N target frequencies. The first communication apparatus sends a sensing signal to the second communication apparatus on the N target frequencies. The second communication apparatus performs angle measurement based on the sensing signal. The N target frequencies belong to a candidate frequency set that includes M candidate frequencies, 1<N<M, and a least common multiple of processed angle measurement ranges corresponding to the N target frequencies is greater than a preset angle measurement range, or the least common multiple of the processed angle measurement ranges corresponding to the N target frequencies is greater than or equal to a least common multiple of processed angle measurement ranges corresponding to any N candidate frequencies in the candidate frequency set.

Abstract: The present invention discloses a travel plan route generation method and system. The method includes: obtaining a cycling start point and a cycling end point inputted by a user, and determining a point of interest (POI) selectable region between the cycling start point and the cycling end point; obtaining POI category labels inputted by the user, and counting the number n of the POI category labels inputted by the user; finding out all POIs belonging to the corresponding categories of the n POI category labels in the POI selectable region, and taking these POIs as alternative POIs; planning several recommended cycling routes for the user to select according to the sequence of the n POI category labels inputted by the user, and calculating the estimated cycling time of each recommended cycling route; and generating a corresponding travel plan route according to the recommended cycling route selected by the user.

Abstract: A data transmission method includes: generating a first data packet, where a signaling field in the first data packet includes bandwidth information and space-time stream information, the bandwidth information is used to indicate first bandwidth, and the space-time stream information is used to indicate k first space-time stream quantities corresponding to k receive ends, where k?1; and sending the first data packet to the k receive ends, where a maximum value of the first bandwidth is greater than 160 MHz, and/or the k first space-time stream quantities meet a preset condition, where the preset condition includes: when k=1, a maximum value of the first space-time stream quantity indicated by the space-time stream information is greater than 8, and when k>1, a maximum value of a sum of the k first space-time stream quantities is greater than 8.

Abstract: An absolute transmission accessory for a spectrometer. One example spectrometer system includes a base plate, a light source configured to transmit light, and an interferometer mounted to the base plate. The interferometer receives the light from the light source and output modulated light. The spectrometer system includes a first optical element configured to receive the modulated light and direct the modulated light, and a second optical element configured to receive the modulated light and focus the modulated light to a sample compartment. The spectrometer system includes a detector compartment including one or more detectors, the detector compartment configured to receive light from the sample compartment. The spectrometer system includes a sample holder coupled to the base plate. The modulated light is directed to the sample holder, and light exiting the sample holder is directed through the sample compartment and to the detector compartment via the second optical element.

Abstract: A ranging method receives, by a first communication apparatus from a second communication apparatus, a first ranging signal and information corresponding to a second ranging signal, wherein the information indicates a time domain sequence or a frequency domain sequence of the second ranging signal, the time domain sequence or the frequency domain sequence is determined based on channel state information obtained by the first communication apparatus through measurement, and the first ranging signal is a signal formed after the second ranging signal sent by the second communication apparatus passes through a channel. Ranging is performed based on the first ranging signal and the time domain sequence or the frequency domain sequence of the second ranging signal.

Abstract: Embodiments of this application provide a user data management method and a related device, to improve user data security. The method includes: A data request device sends a first request to a blockchain platform, where the first request indicates that the data request device needs to access a data storage device. The data request device receives first permission information sent by the blockchain platform, where the first permission information indicates whether the data request device has permission to access the data storage device, and the permission is related to signature information of the data request device, an access type, and an operator public key; and sends a second request to the data storage device if the first permission information indicates that the data request device has the permission to access the data storage device, where the second request includes an access address and an operator private key signature.

Abstract: This application provides a data compression and transmission method, an apparatus, a device, and a storage medium. The method includes: A first communication apparatus performs weighted encoding on first data based on a dictionary matrix, to obtain second data, where the second data expresses the first data based on k basis vectors in the dictionary matrix; and sends the second data to a second communication apparatus on a first transmission resource, to compress physical layer data while a low data loss is ensured. Further, k is a weighting parameter that is determined based on the first transmission resource and that is of the first data, and the weighting parameter k used for performing weighted encoding on the first data is determined based on the first transmission resource.

Abstract: This application discloses a parameter determining method and apparatus. The method includes: after receiving first information, a terminal apparatus in a satellite communication system may determine a second parameter based on the first information and a first parameter, where the first information may indicate an association relationship between the first parameter and the second parameter; the first parameter is a parameter related to coverage of a first satellite, and the second parameter is a parameter related to coverage of a second satellite; and the first satellite is a satellite that provides a service for the terminal apparatus, and the second satellite is a satellite that is to provide a service for the terminal apparatus.

Abstract: Embodiments of this application provide a data packet transmission method, a communication apparatus, and a communication system. The method includes: A first apparatus determines data packet transmission path information based on data service information, where the transmission path information includes information about a second apparatus. The first apparatus may determine the second apparatus based on the transmission path information, and send a data packet processed by the first apparatus to the second apparatus. Alternatively, the first apparatus determines the second apparatus based on transmission path information in an obtained data packet, and sends a data packet processed by the first apparatus to the second apparatus.