32 results about "Standard array" patented technology

A wired and wireless communication method, and more particularly a method and apparatus for reducing a PAPR (Peak to Average Power Ratio) in an OFDM (Orthogonal Frequency Division Multiplexing) system. A transmitter of the OFDM system designates, as a coset leader, a vector capable of minimizing a PAPR in a general standard array of (n, k) linear block codes and transmits a sequence having a minimum PAPR by adding each coset leader to an n-bit codeword corresponding to k-bit information and producing U (≦2n-k) number of vectors. Then, a receiver of the OFDM system can easily recover an original transmission signal using a syndrome of a received vector if the receiver identifies information of the syndrome and the coset leader. Subsequently, the OFDM system can be designed irrespective of the number of carriers, i.e., N, and enhance the system's performance by increasing a value of U. Moreover, the OFDM system different from the conventional SLM (Selective Mapping) system does not have to transmit, to the receiver, information indicating which signal has been selected.

The present invention extends the concept of a standard array waveguide grating (AWG), which focuses each wavelength component launched via an input AWG to a Rowland circle inside a planar lightwave chip (PLC) where discrete waveguides are located, to one which focuses each wavelength component outside of the PLC chip along a straight line. An array of MEMS mirrors or other redirecting elements is positioned at the focus location for independently redirecting each of the wavelength channels back to any number of selected output AWGs formed on the same PLC chip as the input AWG.

The invention relates to an application layer DDOS (distributed denial of service) attack and defense method, which is easy to realize, is low in time complexity and high in accuracy, is transparent to users, and has no influence on the user visit. The method provided by the invention is divided to two stages of a training stage and a work stage. In the training stage, real and legal visit flow is adopted as training data to generate a standard array used for real-time detection and protection of the work stage. According to the invention, application layer DDOS equipment needs to be arranged in front of an application server in series, so that the visit flow can be filtered through a defense device before entering the server.

A wired and wireless communication method, and more particularly a method and apparatus for reducing a PAPR (Peak to Average Power Ratio) in an OFDM (Orthogonal Frequency Division Multiplexing) system. A transmitter of the OFDM system designates, as a coset leader, a vector capable of minimizing a PAPR in a general standard array of (n, k) linear block codes and transmits a sequence having a minimum PAPR by adding each coset leader to an n-bit codeword corresponding to k-bit information and producing U (≦2n-k) number of vectors. Then, a receiver of the OFDM system can easily recover an original transmission signal using a syndrome of a received vector if the receiver identifies information of the syndrome and the coset leader. Subsequently, the OFDM system can be designed irrespective of the number of carriers, i.e., N, and enhance the system's performance by increasing a value of U. Moreover, the OFDM system different from the conventional SLM (Selective Mapping) system does not have to transmit, to the receiver, information indicating which signal has been selected.

The embodiment of the invention discloses an address information analysis method, device and system and a data acquisition method. The address information analysis method comprises the steps of obtaining to-be-analyzed address information in original data; extracting features of the to-be-analyzed address information by using a natural language processing technology, selecting the extracted features, and vectorizing the selected features to obtain feature vectors; inputting the feature vectors into a preset model to obtain an initial array comprising a geographic entity and an administrative division level corresponding to the geographic entity; according to administrative division levels, carrying out sorting and duplicate removal on the geographic entities in the initial array to obtaina standard array; and encoding the standard array to obtain a geocoding result. The geographic entity and administrative division of the address information are recognized based on the model, a rule base does not need to be built, and occupied resources are few. The prediction model is optimized through a feature selection algorithm, so that the prediction accuracy and the calculation rate are improved.

The present invention extends the concept of a standard array waveguide grating (AWG), which focuses each wavelength component launched via an input AWG to a Rowland circle inside a planar lightwave chip (PLC) where discrete waveguides are located, to one which focuses each wavelength component outside of the PLC chip along a straight line. An array of MEMS mirrors or other redirecting elements is positioned at the focus location for independently redirecting each of the wavelength channels back to any number of selected output AWGs formed on the same PLC chip as the input AWG.

The present invention extends the concept of a standard array waveguide grating (AWG), which focuses each wavelength component launched via an input AWG to a Rowland circle inside a planar lightwave chip (PLC) where discrete waveguides are located, to one which focuses each wavelength component outside of the PLC chip along a straight line. An array of MEMS mirrors or other redirecting elements is positioned at the focus location for independently redirecting each of the wavelength channels back to any number of selected output AWGs formed on the same PLC chip as the input AWG.

The invention discloses a method and a system for measuring wind speeds and wind directions. The method includes acquiring the wind speed range and the wind direction range of a to-be-measured wind; establishing an arc-shaped one-transmission four-reception array structure formed by a transmitting array element for transmitting signals and four receiving array elements for receiving the signals, and by taking one of the receiving array elements as a standard array element, acquiring a time delay calculation expression, in which the signals transmitted by the transmitting array element reachingthe receiving array elements is relative to the signals transmitted by the transmitting array element reaching the reference array element; according to the time delay calculation expression and thewind speed range and the wind direction range of the to-be-measured wind, by a beam forming algorithm, calculating the maximum value of output power of a beam former and determining the wind speed andthe wind direction corresponding to the maximum value as the wind speed and the wind direction of the wind. The method and the system have the advantages that the wind directions and the wind speedsare determined according to the time delay, in which the signals reaching the receiving array elements is relative to the signals reaching the standard array standard, and the beam forming algorithm,so that the problem of wind information errors caused by errors of measurement based on a time difference method is avoided, and measurement accuracy and measurement speed are improved.

A method for magnetic character recognition may include preparing standard array data of peak intervals; generating a regeneration waveform out of a character string of magnetic characters printed on a surface of an information data recording medium; segmenting a character waveform of each magnetic character out of the regeneration waveform; generating array data of peak intervals out of an array pattern of a plurality of intervals between peaks that are included in the character waveform; and comparing the array data of peak intervals with the standard array data of peak intervals; wherein, based on a comparison result of comparing the array data of peak intervals with the standard array data of peak intervals, a read character is identified with a character corresponding to an array data of peak intervals that shows the highest coincidence.

A wired and wireless communication method and apparatus for reducing a PAPR Peak to Average Power Ratio in an OFDM Orthogonal Frequency Division Multiplexing system. A transmitter of the OFDM system designates, as a coset leader, a vector capable of minimizing a PAPR in a general standard array of n, k linear block codes and transmits a sequence having a minimum PAPR by adding each coset leader to an n-bit codeword corresponding to k-bit information and producing U<=2n-k number of vectors. Then, a receiver of the OFDM system can easily recover an original transmission signal using a syndrome of a received vector if the receiver identifies information of the syndrome and the coset leader.

The invention relates to a method for detecting the roasting performance of an oven, which comprises the steps of photographing the food roasted out of the oven and saves the photographs as images tobe inspected; converting the image to be inspected into RGB data to form an RGB database to be inspected; extracting the RGB data of the food image in the RGB database to form the target RGB database;judging whether the difference between the RGB data of the food image exceeds the threshold value, and then judging the roasting uniformity of the food; judging whether the difference between the RGBdata of food image and the standard array exceeds the threshold value, and judging the roasting stability of the food; if the roasting uniformity and stability of the food meet the requirements, judging the roasting performance of the oven to meet the requirements; otherwise, judging the roasting performance of the oven not to meet the requirements. The detection method of the baking performanceof the oven provides a reliable basis for the evaluation of the baking performance of the oven by directly detecting the food baked out of the oven, so that the evaluation of the baking performance ofthe oven is more direct and accurate.

The invention relates to a shale gas horizontal well bedding fracture evaluation method based on array induction logging information. Array induction electrical resistivity data of the horizontal section of a horizontal well in a work area with a longitudinal resolution being A and an investigation depth being B are collected, and fracturing section information of the horizontal section of the horizontal well in the work area is collected; the total number of sections of fracturing sections of the horizontal section of the horizontal well and the initial depth and the end depth of the ith section are collected; the array induction logging data are filtered, dynamic standard array induction electrical resistivity data are obtained, a model MARBD=MARB-MARBF is used, array induction electrical resistivity dynamic deviation data MARBD are calculated, the model is used for calculating array induction electrical resistivity dynamic deviation standard deviation sigma of the i section,and results of bedding fracture development of the horizontal section of the shale gas horizontal well are output. According to the shale gas horizontal well bedding fracture evaluation method, eightwells are applied, results show that the actual total sand adding amount of a single well is higher, and the gas production rate is higher in wells with more developed shale gas horizontal well bedding fractures based on array induction logging information evaluation.

The invention discloses a restoration correction method of an ultrasonic phased array probe array. The method comprises: through utilization of a sound-field superposition principle, in a normal excitation circumstance, calculating sound pressure distribution of multiple points of a standard array in space; taking the sound pressure distribution as a correction reference; through utilization of a self-adaptive-algorithm-based correction program, calculating correction coefficients of array elements from the first array element of a non-standard array; adjusting the excitation parameter of the corrected array through utilization of circularly changing the correction coefficient of the corrected array element; circularly completing all array element correction to obtain a correction parameter; taking the correction parameter as the initial value of each array element excitation parameter; repeating the first correction circulation to obtain a more accurate correction coefficient; taking the correction coefficient of each calculated array element as the excitation parameter of the corresponding array element; and correcting the radiated sound field of the non-standard array to achieve fast correction of array elements. The method is high in correction efficiency and allows cost of restoring and correcting an ultrasonic phased array to be reduced.

A method for magnetic character recognition may include preparing standard array data of peak intervals; generating a regeneration waveform out of a character string of magnetic characters printed on a surface of an information data recording medium; segmenting a character waveform of each magnetic character out of the regeneration waveform; generating array data of peak intervals out of an array pattern of a plurality of intervals between peaks that are included in the character waveform; and comparing the array data of peak intervals with the standard array data of peak intervals; wherein, based on a comparison result of comparing the array data of peak intervals with the standard array data of peak intervals, a read character is identified with a character corresponding to an array data of peak intervals that shows the highest coincidence.

The invention relates to a collimator and a preparation method, belongs to the technical field of optical communication, and is in particular relates to a two-dimensional array collimator based on a total reflection prism and a preparation method of the two-dimensional array collimator. Optical fiber arrays of all layers are stacked and bonded to form an optical fiber array body after the focal length of each layer of the optical fiber arrays is consistent with the focal length of each layer of the lens array, and then the uniformity index of the line degree of each layer of the lens array relative to each layer of the optical fiber array is adjusted, and each layer of the optical fiber array is independently packaged on a lens array fixing frame to form an optical fiber array front body.A one-dimensional standard array collimator is aligned with the middle layer debugging line degree and the center of an array collimator front body and then is fixed after moving the interval. The total reflection prism is packaged and fixed to the emergent end of the optical fiber array front body after being aligned with the debugging line degree and the center of the standard array collimator,so as to form a two-dimensional collimator array with extremely high interval density. The two-dimensional array collimator has the advantages that the cost of raw materials is low, and the debuggingand packaging process is easy to realize. A two-dimensional collimator array with extremely high integration level can be realized (the minimum distance is 125*250 mm<2>. ). The two-dimensional arraycollimator has the characteristics of being high in collimation parallelism, high in light spot consistency, low in insertion loss, stable in structure and the like.

The invention discloses a user-defined coordinate array noise signal real-time data analysis system and method, the system comprises an acquisition front end, a data acquisition instrument, a communication bus, an interaction terminal and a power supply, the acquisition front end is a user-defined coordinate acoustic sensor array and is used for real-time acquisition of noise signals; the data acquisition instrument is used for preprocessing the noise signals acquired by the acquisition front end, and calculating data obtained by preprocessing by using an FPGA operation module included in the data acquisition instrument to obtain a real-time imaging result of matching of an array acoustic cloud picture and an optical cloud picture; the real-time imaging result is transmitted to the interaction terminal through the communication bus and is displayed; the communication bus is used for realizing transmission communication of system data; and the interaction terminal is used for issuing an interaction instruction and displaying an acoustic imaging result. The system and the method can reduce the influence of the collected noise signal caused by the distance and the standard array form, and accelerate the matching of the acoustic cloud picture and the optical cloud picture.

The invention discloses a motion teaching method, a terminal and a computer readable storage medium. The motion teaching method comprises the steps of obtaining a user picture, extracting user motiondata of each frame of user picture and putting the extracted user motion data into arrays to be verified in sequence; every time when the storage upper limit of the arrays to be verified is reached, calculating initial similarities of all the arrays to be verified and corresponding standard arrays to obtain target similarities corresponding to all the standard arrays; according to the target similarities corresponding to all the standard arrays, obtaining a learning total score value. By means of the motion teaching method, the terminal and the computer readable storage medium, the target similarities corresponding to all the standard arrays are obtained, that is, equivalently, learning conditions of standard motions corresponding to all the standard arrays of a user are obtained, thus thelearning total score value is obtained, on one hand, the user can better know the learning conditions of the user himself / herself, and the leaning efficiency is improved; on the other hand, the economic cost and the time cost are lowered.

The invention discloses an efficient test method for a constant false alarm rate detection software unit, and the method comprises the following steps: 1, analyzing the constant false alarm rate detection software unit, determining a large array input and output variable, and performing simulating to generate large array input data; 2, creating a universal driving function, and assigning values tothe large array input data to obtain assigned large array input variables; 3, performing simulation test on the assigned large array input variable to obtain a standard array; 4, judging whether thestandard array reaches a test threshold value or not: if so, finishing the test; 5, if not, repeating the steps 3-5 until the test is completed. According to the invention, the problem of low efficiency of traditional constant false alarm detection software unit testing is solved; the driving function is parameterized and modularized, expansibility and universality are enhanced, the expected valueand the actual value of the big data output array are compared automatically, the defects that a traditional testing tool inputs big array data manually and compares the big array data manually are overcome, and software testing efficiency is improved.

The invention discloses a porous expanded connection device for expanded connection of multiple heat exchange pipes. The porous expanded connection device comprises an expanded connection unit comprising multiple expansion heads, and a power device for driving the expanded connection unit to expand the heat exchange pipes. The porous mode can be interpreted as one row of holes at a time, multiple rows of holes at a time, one standard array unit at a time, multiple standard array units at a time, a single pipe plate surface at a time or two pipe plate surfaces at a time. When the porous expanded connection device is used, the expansion heads in the expanded connection unit are pushed into the heat exchange pipes by the power device, and the expanded connection work is carried out by the expansion heads, so that the heat exchange pipes are subjected to expanded connection at the same time. Therefore, the production efficiency is improved, the expanded connection quality is stabilized and the expanded points cannot be locally loosened.

The invention discloses a highway ETC performance rapid detection vehicle system. ETC radio frequency physical information of an equidistant standard array antenna and wheel speed and vehicle speed information of a detection vehicle are acquired through an ETC performance detection module and a wheel speed encoder; and a mapping relationship between the ETC radio frequency acquisition informationand the acquisition point position is constructed to perform data processing to obtain a field intensity distribution condition of a lane pavement, and then a longitudinal deflection angle, a depression angle and an installation height of ETC antenna installation are obtained. According to the invention, the ETC performance of a toll station and a portal system can be rapidly and automatically detected, analyzed and evaluated without parking or road closure in a normal traffic environment, and a technical basis and a solution are provided for stable operation and scientific management and maintenance of ETC.

The invention discloses a method and a system for measuring wind speeds and wind directions. The method includes acquiring the wind speed range and the wind direction range of a to-be-measured wind; establishing an arc-shaped one-transmission four-reception array structure formed by a transmitting array element for transmitting signals and four receiving array elements for receiving the signals, and by taking one of the receiving array elements as a standard array element, acquiring a time delay calculation expression, in which the signals transmitted by the transmitting array element reachingthe receiving array elements is relative to the signals transmitted by the transmitting array element reaching the reference array element; according to the time delay calculation expression and thewind speed range and the wind direction range of the to-be-measured wind, by a beam forming algorithm, calculating the maximum value of output power of a beam former and determining the wind speed andthe wind direction corresponding to the maximum value as the wind speed and the wind direction of the wind. The method and the system have the advantages that the wind directions and the wind speedsare determined according to the time delay, in which the signals reaching the receiving array elements is relative to the signals reaching the standard array standard, and the beam forming algorithm,so that the problem of wind information errors caused by errors of measurement based on a time difference method is avoided, and measurement accuracy and measurement speed are improved.

The invention provides a formation detection method and device for a motion matrix of a large-scale activity, and the method comprises the steps: obtaining a target video of a target motion matrix in a target environment; generating a jitter factor corresponding to a target video frame based on the target video frame in the target video and the diagonal gray projection standard array; and under the condition that the jitter factor is lower than a target jitter threshold, generating a target image of the target motion matrix based on the target video frame. According to the formation detection method of the motion square matrix of the large-scale activity, the jitter factor is generated based on the target video frames in the target video and the diagonal gray projection standard array, and the target video frames are screened based on the jitter factor so as to retain the target video frames with relatively low jitter amplitude, and the formation detection accuracy of the motion square matrix of the large-scale activity is improved. And the target video frame with relatively low jitter amplitude is processed to generate the target image of the target motion square matrix, so that the imaging definition is effectively improved, and the detection result can be improved.

A method for extracting and comparing spectral features of remote sensing images. After the de-correlation between multispectral image spectra is completed by principal component transformation, each cluster center vector of the image is determined, and each vector element of the image is divided into each cluster according to the "proximity principle". Go to the class represented by the class center, and then perform merging and splitting operations on the clustering results, so that the clustering results tend to be balanced, and the final result of feature extraction is obtained. Finally, after the feature extraction of the two images is completed, compare them according to the four features The standard scalarizes the comparison between vector arrays, so that the similarity and difference between images can be qualitatively and quantitatively reflected. The present invention adopts the improved iterative self-organizing data analysis technology ISODATA, which can greatly reduce the amount of calculation and the required parameters while ensuring the effect of the original algorithm, especially when there are many remote sensing image bands, and make the control of the parameters easier. And the feature extraction results can be used for image database retrieval.

The invention relates to a method for estimating array amplitude and phase errors based on a sparse reconstruction algorithm, which includes: obtaining space-time data received by an antenna array; first constructing a standard array flow pattern dictionary matrix, and then initializing the additive amplitude and phase error to obtain The dictionary matrix of amplitude and phase errors; use the sparse formula to iteratively calculate the amplitude and phase errors and clutter spectrum, and then use the least squares to correct the dictionary matrix with amplitude and phase errors, and then perform cyclic iteration estimation to achieve two adjacent clutter spectrum estimation errors Stop when the desired condition is met. The array amplitude and phase error estimation method based on the sparse reconstruction algorithm of the present invention double estimates the amplitude and phase error of the array based on the multiplicative and additive amplitude and phase error representation method, and continuously updates the amplitude and phase error in the sparse iteration process, so that the The estimated value of the clutter spectrum is more accurate, and the calculation amount of the array amplitude and phase error estimation method of the present invention is greatly reduced.

The invention discloses a data error detection method and system, wherein the method comprises the following execution steps of obtaining a first data block group corresponding to a classification information request according to a received classification information request; obtaining the array length of a data label corresponding to each data block in the first data block group; comparing the array length of the data label corresponding to each data block in the first data block group with the prestored standard array length; abandoning data blocks with the array length not matched with thestandard data length in the first data block group to obtain a second data block group; analyzing the second block group to obtain first classification information corresponding to each data block inthe second data block; comparing the first classification information corresponding to each data block in the second data block group with the second classification information corresponding to the classification information request; abandoning data blocks with the first classification information not matched with the second classification information in the second data block to obtain a third data block group. The method and the system can effectively abandon the data with the errors; the network data transmission efficiency is improved.

The invention discloses an article grading method, an article grading device and an article automatic grading system. The article grading method comprises the steps that 1, a picture containing a to-be-classified article is obtained, and effective pixel points are extracted from the picture; 2, in all or partial channels of RGB channels, the number of pixels occupied in the effective pixel pointsare counted correspondingly when values of each channel component are different, and the ratio of the number of the effective pixel points of all values to the total number of effective pixel points is calculated correspondingly; 3, all ratios are constructed as a color distribution array according to the arrangement order of standard arrays; and 4, the correlation coefficients of the color distribution array and the different standard arrays are calculated correspondingly, one standard array is associated with one grade, each grade is associated with at least one standard array, and the gradeassociated with the standard array participating in the correlation coefficient with the largest calculation value is taken as the grade of the to-be-classified article. The method is little in operation amount, high in parallelism, simple and convenient, and capable of quickly and accurately obtaining the grade of the to-be-classified article.

The invention discloses a data error detection method and system, wherein the execution steps of the method are: according to the received classification information request, obtain the first data block group corresponding to the classification information request; obtain each data block group in the first data block group The array length of the data tag corresponding to the block; the array length of the data tag corresponding to each data block in the first data block group is compared with the pre-stored standard array length, and the array length in the first data block group and the standard data are discarded The data blocks whose lengths do not match are obtained to obtain the second data block group; the second data block group is parsed to obtain the first classification information corresponding to each data block in the second data block group; each data block in the second data block group is Comparing the corresponding first classification information with the second classification information corresponding to the classification information request; discarding data blocks in the second data block group whose first classification information does not match the second classification information, to obtain a third data block group. The above method and system can effectively discard data with errors and improve the efficiency of network data transmission.