8results about How to "Accurate decoding" patented technology

The application relates to the field of backscatter technology and discloses a single-receiver WiFi backscatter communication method and system, which comprises the following steps: a tag receives OFDM symbols from ambient WiFi signals, a linear phase factor corresponding to a tag-related cyclic shift value is applied to only the middle part of a data load, and the OFDM symbols of a reflection signal are reconstructed based on the middle part of the modulated data load; a receiver extracts the modulated part from the received OFDM symbols of the reflection signal, performs frequency domain inverse shift compensation on each candidate cyclic shift value, obtains a reconstructed data load based on the obtained compensated spectrum, calculates the correlation score between the power spectrum of the reconstructed data load each time and a binary template predefined based on the position of the empty subcarrier, decodes the cyclic shift value, and recovers the corresponding tag data. The application can realize a high data throughput without sacrificing OFDM compatibility.

The invention relates to a voice-based self-service wine selling device and method for self-service wine taking. The voice-based self-service wine selling device comprises a wine storage cavity, a data acquisition module, a wine amount calculation module, a two-dimensional code generation module, a locking module and a display module, a wine cover is arranged at the top of the wine storage cavity, a wine outlet module is arranged at the position, close to the bottom, of the wine storage cavity, a wine outlet is formed in the wine outlet module, a wine taking module is arranged below the wine outlet, the data acquisition module and the wine amount calculation module are arranged in the wine cover, and the data acquisition module is connected with the wine amount calculation module. The wine amount calculation module is connected with the two-dimensional code generation module, the two-dimensional code generation module is connected with the locking module, the locking module is connected with the wine taking module, and the two-dimensional code generation module is connected with the display module. By means of the device, automatic wine taking is achieved, cost calculation is automatically conducted, and a user conducts the whole process from wine taking to payment in a self-service mode.

The utility model discloses a multi-channel network power amplifier device which comprises a shell, a front cover is movably connected to the side face of the shell in a penetrating mode, a rear cover is movably connected to the other side of the shell in a penetrating mode, an input board is movably connected into the shell, and a plurality of input channels are fixedly connected to the side face of the input board. The side face of the input board is movably connected with a first data line, the upper end of the input board is movably connected with a control board, symmetrical positioning boards are fixedly connected in the shell, power amplifier modules are movably connected in the positioning boards, symmetrical ventilation holes are formed in the side face of the shell, symmetrical sliding grooves are movably connected in the shell, and the power amplifier modules are movably connected in the sliding grooves. Symmetrical fan covers are fixedly connected into the shell, and motors are fixedly connected to the side faces of the fan covers. Through the structure, efficient transmission and accurate decoding of multichannel audio signals are guaranteed, internal heat is effectively discharged, elements are prevented from being overheated, and the use stability and cruising ability of equipment are enhanced.

A first base station (106) operates as an auxiliary receiver to intercept portions of a data stream (105b) as one or more code shortened portions of the data stream, where a source device (104) is sending the data stream (105a) on the uplink to a second base station (102). The data stream sent from the source device may be addressed to a destination device (110) and may comprise code words. Upon intercepting the one or more code shortened portions of the data stream, the first base station may send the intercepted one or more code shortened portions of the data stream onward through a network (112) to the destination device. The destination device may then use data redundancy provided by the intercepted one or more code shortened portions of the data stream and the original data stream for enhanced decoding of redundant portions of the data stream.

This invention provides an automatic billet information tracking and receiving / sending control method based on a steel rolling heating furnace, relating to the field of steel production technology. The method includes the following steps: Step 1: Receiving billet coding information from the steelmaking system via a gateway communication device between steelmaking and rolling; Step 2: Determining if the coding information is correct. If it does not conform to the rules, the system returns to receive the coding information again and returns an error instruction to the steelmaking system; Step 3: Upon receiving data that conforms to the rules, the system calls the information decoding module to perform protocol decoding on the received data; Step 4: Generating a tracking sequence from the decoded data according to the data definition. This invention quickly, accurately, and in real-time decodes the billet coding data sent from the steelmaking system, achieving fully automatic billet tracking from the hot conveyor roller to the furnace. It then matches the weighing, length measurement, and temperature data with the steelmaking flow data, re-matches and returns the data to the steelmaking system, facilitating collaborative work between the steel rolling and steelmaking systems.

The application provides a non-contact eye movement tracking device, a control input system and a method, and belongs to the technical field of visual tracking. The device comprises a sensing interface array and a wearing device, the sensing interface array is attached to the wearing device, the sensing interface array comprises sensing electrodes and a transparent support layer, the sensing electrodes are attached to the transparent support layer, the sensing electrodes are covered with dielectric material, the surface of the dielectric material can maintain static electricity and generate an electric signal when the eye movement is performed. The device uses a transparent sensing interface array placed in front of the eyes, generates mutual induction with the fluctuation movement of the skin around the eyes in the form of a space electric field when the eyes move, and couples and decodes the multiple signals generated by the mutual induction, so that accurate identification of blinking and eyeball rotation is realized, and a mouse input system controlled by eye movement is formed.

The application provides an audio data processing method and device for sound wave communication and a storage medium, which comprises the following steps: obtaining initial communication text to be sent, and performing encoding processing on the initial communication text to determine the encoding data corresponding to the initial communication text; the encoding data comprises at least one of check bit data and error correction code data corresponding to the initial communication text; performing frequency conversion on the encoding data to determine the frequency data corresponding to the encoding data; performing audio generation processing on the frequency data by using a pulse code modulation mode and a sine wave function to determine the audio data corresponding to the frequency data; the audio data comprises multiple syllables, and the volume change trend of each syllable from the beginning to the end is first large and then small; the audio data is sent to a receiving end device; and the audio data is used to enable the receiving end device to decode the audio data and then perform sound wave communication. The technical scheme can improve the success rate of sound wave communication.

The application discloses a behavior analysis method, system, device and medium based on multi-modal data. The method comprises the following steps: extracting a behavior label corresponding to each frame of image in animal behavior video data, and constructing a behavior label sequence; aligning a neuron calcium activity time sequence in a standardized neuron calcium activity time sequence dataset with the behavior label sequence, and obtaining an aligned structured data table; taking the aligned neuron calcium activity time sequence as a feature of a node, and constructing a weighted graph structure; training a cascaded graph convolution network, a graph sampling aggregation network and a graph attention network according to the weighted graph structure and the aligned behavior label, and obtaining a trained graph convolution network, a trained graph sampling aggregation network and a trained graph attention network, so as to perform behavior prediction on a neuron calcium ion fluorescence signal value to be predicted, and obtain a behavior prediction result. The application can improve the behavior analysis accuracy.