31results about How to "Reduce error impact" patented technology

Provided is a system and method for scrambling based peak-to-average power ratio reduction without side information. One of a set of scrambling sequences is used at the transmitter which results in either a minimum or acceptable peak power. Rather than transmitting side information identifying which of the set of scrambling sequences was selected, the scrambling sequence is also applied to the CRC, and using syndrome detection the receiver is capable of determining which scrambling sequence was used at the transmitter and can proceed with the necessary de-scrambling.

A method of determining a wavefront of a received light beam includes: (a) receiving a light beam; (b) producing a group of light spots from the light beam; (c) qualifying a set of the light spots for use in determining a wavefront of the received light beam; and (d) determining the wavefront of the received light beam using the qualified set of light spots. Qualifying the set of light spots includes, for each light spot: calculating a first calculated location of the light spot using a first calculation algorithm; calculating a second calculated location of the light spot using a second calculation algorithm; and when a difference between the first and second calculated locations for the light spot is greater than an agreement threshold, excluding the light spot from the set of light spots and / or from being employed in determining the wavefront of the received light beam.

A method of determining a wavefront of a received light beam includes: (a) receiving a light beam; (b) producing a group of light spots from the light beam; (c) qualifying a set of the light spots for use in determining a wavefront of the received light beam; and (d) determining the wavefront of the received light beam using the qualified set of light spots. Qualifying the set of light spots includes, for each light spot: calculating a first calculated location of the light spot using a first calculation algorithm; calculating a second calculated location of the light spot using a second calculation algorithm; and when a difference between the first and second calculated locations for the light spot is greater than an agreement threshold, excluding the light spot from the set of light spots and / or from being employed in determining the wavefront of the received light beam.

One of first through fourth target state of charge levels, which are set at values that increase gradually over time, is selected on the basis of an ON / OFF state of a specific current consumer installed in the vehicle and a state of charge immediately preceding an engine stoppage. A target state of charge is set on the basis of the selected target state of charge level and an elapsed time after the lead storage battery is installed in the vehicle, whereupon the target state of charge is compared with the actual state of charge of the lead storage battery. The lead storage battery is charged in accordance with the comparative result.

A RF tag reader may use spatial averaging to compensate for the limitations of performing multi-frequency continuous-wave ranging (MFCW) in a bandwidth-limited environment. Although MFCW provides an estimate of the separation distance between a RF tag and the tag reader with errors that vary widely, the error values form a pattern based on the separation distance. That is, as the separation distance increases or decreases, the error values oscillate between maximum and minimum values centered on the correct separation distance. Accordingly, in one embodiment, the receiver uses spatial averaging to average out this oscillating error (e.g., the maximum errors are counter-balanced by the minimum errors). The more accurate, spatially-averaged MFCW estimate may then be used to resolve the cycle ambiguity in continuous-wave ranging to identify the separation distance between the RF tag and the tag reader.

Disclosed is an optical floating sub-assembly, comprising a thermally conductive non rigid substance between the heat sink carrier and external casing, to minimize mechanical stress on the optical assembly. Also disclosed is a printed circuit board as an electrical interface, comprising two modules capable of converting an electrical signal to an optical signal, transmitting the optical signal and then converting the optical signal back to an electrical signal. Also disclosed is an optical assembly, comprising a heat sink with mechanical features for optical alignment.

A vehicle speed calculator includes a vehicle speed calculation unit for calculating a vehicle speed from a traveled distance per unit time of a feature point in a captured image shot by a camera for capturing a road surface, a reference distance mark irradiation unit and an image reference distance detection unit. The reference distance mark irradiation unit irradiates a reference distance mark to the road surface in parallel with an optical axis of the camera. The reference distance mark is formed in such a manner as to have a reference distance in a longitudinal direction of a motorcycle. The image reference distance detection unit detects an image reference distance, the longitudinal length of the reference distance mark in the shot image. The vehicle speed calculation unit calculates the vehicle speed from the traveled distance using the image reference distance and the reference distance.

The invention relates to a method for extracting and judging operation data stability of ship electromechanical equipment. The method comprises the following steps: acquiring ship electromechanical equipment data, preliminarily judging data stability, calculating the minimal length of a stable inspection data segment, judging data stability point by point, correcting the stability inspection result as well as storing and outputting results. The defects that true stable data is difficult to judge simply by the statistic method and large-range judgment error occurs in the prior art are overcome.Through the judgment method, the stable operation data of the electromechanical equipment is extracted, accuracy and reliability of modeling, evaluation and even optimized decision can be improved, and important significance in analysis and research of ship data is achieved.

The invention provides a site aggregation method and device in an electronic map, computer equipment and a medium. The method comprises the following steps: acquiring a same station list; clustering the stations in the same station list according to the geographic positions of the stations in the same station list; selecting one station from each class clustered by the same station list as a secondary aggregation station in the class; obtaining a similar station list; clustering the stations in the similar station list according to the geographic positions of the stations in the similar station list; and selecting one station from each class clustered by the similar station list to serve as a first-level aggregation station in the class. According to the embodiment of the invention, densestacking of stations with close distances and same or similar names on the electronic map is avoided, the station search convenience is improved, and station line data errors are reduced.

The present invention provides methods for generating self-inverting turbo code interleavers having high separation and high dispersion characteristics. Methods are provided for deterministically generating self-inverting turbo code interleavers from a specification for an existing non-self-inverting interleaver. Methods are also provided for randomly generating self-inverting turbo code interleavers. The present invention also provides methods and apparatus for encoding digital data and communicating the digital data using self-inverting turbo code interleavers / de-interleavers.

An apparatus and method for canceling interference in an OFDM system using multiple antennas, wherein an error of a symbol received from another receiving antenna is estimated based on an error estimation of a symbol received from another receiving antenna. Before transmission, symbols to be transmitted through a plurality of transmit antennas are shifted by a predetermined number of bits without overlapping. Thus, the influence of an error in a symbol received from a receive antenna on an erroneous estimate of a symbol received from another receive antenna is reduced.

The invention provides a context-aware embedded crowd counting method, a context-aware embedded crowd counting system, a medium and electronic equipment, wherein the context-aware embedded network ismainly used for extracting low-level spatial features of an image, segmenting the image into super-pixels, fusing a result of segmenting the image into the super-pixels and an extraction result of thelow-level spatial features, and extracting global association of the features to finally generate a density map. According to the super-pixel network adopted by the invention, the pixels are groupedby utilizing the similarity of the characteristics among the pixels, and a small number of super-pixels are used for replacing a large number of pixels to represent the characteristics of the picture,so that the complexity is greatly reduced. The context-aware embedded network adopted by the method can extract global association between any two point features on the feature map, so the feature expression capability is enhanced; when complex and diverse scenes are processed, the complex crowd distribution condition in the crowded scene can be well processed, some errors are avoided, and the error influence is reduced, so that the total number of crowds can be better counted.

The invention discloses a reader system. The reader system comprises a processor, a data adapter, a power supply end power supply carrier module, a bus, a plurality of reader-writers and a plurality of lamp boxes. The processor is used for controlling the working state of the reader-writer through the bus. The data adapter is electrically connected with the bus and the processor respectively and is used for enabling the processor and the bus to carry out asynchronous communication. The power supply end power supply carrier module is used for filtering a transmission signal on the bus so as toextract a carrier signal. The bus comprises a power line and a CAN bus, the power line is used for transmitting a power signal, and the CAN bus is used for transmitting a carrier signal. The lamp boxis used for indicating the working state of the reader-writer. The invention further discloses a reader setting method. By means of the reader system and the reader setting method, multiple readers can be connected at the same time, and the working states of the readers can be rapidly displayed.

The invention provides a multi-level supervision crowd counting method and device, a medium and electronic equipment, and the method comprises the following steps: enabling an image to be sequentiallyinputted into all subordinate feature extraction modules of a feature extraction module 1 through the feature extraction module 1, so as to obtain an output feature map corresponding to each featureextraction module i; fusing the output feature map corresponding to each feature extraction module i and the output feature map corresponding to each subordinate feature extraction module of the feature extraction module i; respectively carrying out density map estimation on each fusion result so as to respectively obtain a sub-density map corresponding to each fusion result; performing joint calculation on the sub-density maps to obtain a final density map; and obtaining the total number of people according to the final density map. The multi-level supervised network adopted by the inventioncan fuse a plurality of density maps to generate a more accurate final density map, so that some errors are avoided, the error influence is reduced, and the total number of people can be better counted.

The invention relates to a differential privacy aggregation-based graph neural network construction method and system, and the method comprises the steps: firstly obtaining a graph data set G from a crowdsourcing platform, and initializing a graph neural network model which at least comprises two layers of network structures; inputting the graph data set G into the graph neural network model, performing differential privacy aggregation processing on each node data of the graph data set G in the first-layer network structure, and outputting the data to the second-layer network structure; taking the output of the first-layer network structure as the input of a second-layer network structure, performing aggregation and classification prediction, and calculating a loss function by using a classification prediction result and a true value; and according to the value of the loss function, carrying out iterative training and model parameter updating or ending training, and outputting a current model parameter. In the model construction process, disturbance information is added to aggregated information by using the idea of differential privacy aggregation so as to achieveprotection of user privacy information in a data set.

In a data transmitter having a data encoder, an encoder mode is detected. Thereafter, an excluded codeword output by the encoder operating in the encoder mode is identified. Next, a selected bit in the excluded codeword caused to have a predetermined value to produce a non-excluded codeword. Finally, the excluded codeword is substituted with the non-excluded codeword, wherein the non-excluded codeword is selected to mitigate effects of a decoding error in a receiver associated with the excluded codeword.

The invention discloses a pre-coding device in cooperative communication based on a historical track, and the device comprises a return stroke interface, a pre-coder, and a historical track recorder. The device corrects a current wrong construction value through employing the historical track of the pre-coder, thereby reducing the impact caused by non-ideal return strokes in a cooperative system, and reducing the interference among channels and the interference among users. The experiment result indicates that the method can reduce a half of the interference among channels and the interference among users at most. The device can correct a wrong pre-coder through the historical track, and improves the accuracy of the pre-coder, thereby reducing the impact on pre-coding errors from incomplete channel state information (CSI), and reducing the interference among channels and the interference among users in a cooperative communication system, wherein the interference is caused by the above impact.

The invention discloses a pre-coding device in cooperative communication based on a historical track, and the device comprises a return stroke interface, a pre-coder, and a historical track recorder. The device corrects a current wrong construction value through employing the historical track of the pre-coder, thereby reducing the impact caused by non-ideal return strokes in a cooperative system, and reducing the interference among channels and the interference among users. The experiment result indicates that the method can reduce a half of the interference among channels and the interference among users at most. The device can correct a wrong pre-coder through the historical track, and improves the accuracy of the pre-coder, thereby reducing the impact on pre-coding errors from incomplete channel state information (CSI), and reducing the interference among channels and the interference among users in a cooperative communication system, wherein the interference is caused by the above impact.

The invention relates to a method (54) for operating a brushed commutator motor (12) of an adjusting drive (8) in a motor vehicle, particularly a window lifter (2), having a rotor (24) and having a stator (22). An angular position (Alfa) of the rotor (24) with respect to the stator (22) is determined. The angular position (Alfa) is used to determine a ripple (60) within the torque (M), which ripple can be expected on the basis of the commutation. The motor current (I) is adapted such that the amplitude of the ripple (60) that can be expected remains below a determined limit value. The invention additionally relates to an adjusting drive (8) of a motor vehicle.

The invention discloses a data extraction method and device. The method includes: analyzing the acquired data extraction task of the source system, and generating a data extraction list corresponding to the data extraction task according to the data partition granularity; Extract the data capacity in the list, and determine the data extraction method for the source system; if the first preset data extraction method is used for data extraction, extract the data of each of the data partitions, and generate the first data file , saving the first data file to the target system; if the second preset data extraction method is used for data extraction, perform data extraction on the source system, and save the extracted data file to the target system. The invention realizes data table partition extraction, improves data extraction efficiency and reduces data extraction errors.

The invention discloses a posterior probability algorithm based on a weighted decision tree. According to the method, based on a conventional decision tree algorithm, a weight influence factor is added when a decision tree is split, and the influence of signal-to-noise ratio classification is improved, so the final information entropy of nodes with high signal-to-noise ratio is enhanced, the overall probability distribution relation is effectively changed by the changed information entropy, and the influence of untrusted classification is reduced. According to the invention, the error influence caused by abnormal data can be effectively reduced; the dual polarization phenomenon caused by unbalanced data sample distribution is reduced; the influence of credibility is brought in, so the reliability of the model is improved; and an over-fitting phenomenon caused by data exception is reduced.

The invention discloses a bracelet vibration reminding doorbell for hearing-disabled people. The bracelet vibration reminding doorbell comprises a doorbell, switches, a doorbell-end single chip microcomputer, a transmitting module, a transfer device, and a receiving terminal. The doorbell switch, the doorbell-end single chip microcomputer and the transmitting module are connected in sequence. The receiving terminal includes a receiving module, a receiving-end single chip microcomputer, a vibration motor, and a receiving bracelet. The receiving module, the receiving-end single chip microcomputer and the vibration motor are connected in sequence. The receiving module, a digital lock, the receiving-end single chip microcomputer and the vibration motor are arranged inside the receiving bracelet. The bracelet vibration reminding doorbell further comprises the transfer device which is composed of a transfer receiving module, a transfer transmitting module, a transfer power supply, and a transfer single chip microcomputer. The transfer receiving module, the transfer single chip microcomputer and the transfer transmitting module are connected in series. The bracelet vibration reminding doorbell is made of commonly-used materials, and is low in cost, highly integrated and easy to carry. Moreover, as the elderly is reminded in a comfortable and effective way, convenience is brought to the elderly in daily life, and the family members no longer fear for the elderly.

A method operates a brushed commutator motor of an adjusting drive in a motor vehicle, particularly a window lifter, having a rotor and having a stator. An angular position of the rotor with respect to the stator is determined. The angular position is used to determine a ripple within the torque, which ripple can be expected on the basis of the commutation. The motor current is adapted such that the amplitude of the ripple that can be expected remains below a determined limit value.