46 results about "Total correlation" patented technology

The invention provides an AP (access point) selecting method based on a clustering idea. The invention relates to the AP (access point) selecting method based on the clustering idea. The invention provides the AP (access point) selecting method based on the clustering idea to solve the problems that by using a unified standard to perform screening, errors are easily caused in a step of judging a cluster head during positioning, and the positioning variance is relatively large. The method comprises the following steps: 1, acquiring regular rectangular fingerprint maps of m*n reference points; 2, solving correlation of each reference point in the fingerprint maps; 3, obtaining a total correlation matrix Phi i,j between i,j and four adjacent points; 4, obtaining an invalid position distribution map corresponding to each AP in the fingerprint maps; 5, recording APs with weak resolution ratios and same serial numbers in each cluster; and 6, eliminating the APs with weak resolution ratios and same serial numbers from each cluster of the fingerprint maps, and transmitting the AP series numbers in the fingerprint maps after the elimination to users. The AP selecting method provided by the invention is applied to the field of AP selection based on the clustering idea.

Methods and systems are provided for the deconvolution of the NMR spectrum of a mixture into individual components and spin systems by combining covariance total correlation spectroscopy (TOCSY) spectra with covariance NMR. The method may include obtaining a 2D TOCSY spectra of a chemical mixture and then performing a series of analytical steps to identify the individual components of the mixture.

A plurality of divided exposure images (first to fourth images) are obtained by dividing a normal exposure time. By an image matching method, a motion detection circuit calculates a plurality of cumulative total correlation values between different divided exposure images, and searches the plurality of cumulative total correlation values for the smallest cumulative total correlation value, thereby calculating a motion vector between the different divided exposure images. In addition, based on the level of the smallest cumulative total correlation value, the level of reliability B[i] indicating the accuracy of the motion vector is calculated. An image combining circuit uses the level of reliability B[i] as a mixture proportion. The image combining circuit positions the divided exposure images based on the motion vector, and combines the divided exposure images together one on top of another in mixture proportions (B[i]), so as to form one still image that suffers less from camera shake.

Following transmission of a watermarked audio signal over an acoustic path causing echoes, reverberation and / or noise, watermark detection correlation result peak values are concentrated within a limited temporal range around main correlation result peaks, which limited temporal range is much smaller than the total correlation length. The watermark detection is based on the following: given np correlation result peak values v=(v1, v2, . . . , vnp) in an average or expected probability distribution for correlation result values for unmarked content, the probability is calculated that within windows covering the limited temporal range there are np or more values from a correlation result value set greater than or equal to these peaks v.

System for building a geological model of oil or other mineral deposit. The system determines functionals represented by the sum of coefficients of correlation for a set of well log curves. A technical result is the improvement of the accuracy of evaluating parameters that are used to build geological model of the location of oil or other deposits. The system makes it possible, given set of markers, chosen as initial solution and to calculate their depths at each well to ensure the best total correlation. For any marker in the set, functional is determined, represented by the sum of correlation coefficients for the set of well log methods for pairs of wells located within specified distance from one another. Partial derivatives are evaluated for this functional, and the vector thus obtained is smoothed and used to search for a larger value of the functional within certain segment along this vector.

The invention discloses a weak password detection method suitable for being executed in a server.The method includes the steps that a user name and a to-be-detected password input by a user are acquired; the correlation length pair and the total correlation length of the to-be-detected password are calculated; a first ratio of the correlation length pair and the total length of the to-be-detected password is calculated, and a second ratio of the total correlation length and the total length of the to-be-detected password is calculated; if the first ratio is not smaller than a first threshold value, or the second ratio is not smaller than a second threshold value, it is confirmed that the to-be-detected password is a weak password.The invention further discloses a weak password detection device and the server.

The invention relates to a power load decomposition method and system. The method comprises the following steps: obtaining active power amplitude and reactive power amplitude of each electrical device at a preset sampling point within a set time length; obtaining an actual active power value and an actual reactive power value of the preset sampling point in the preset time length; according to the active power amplitude, determining a fitting active power value of an electrical device, and according to the reactive power amplitude, determining a fitting reactive power value of the electrical device; according to the actual active power value and the fitting active power value, determining an active power correlation coefficient, and according to the actual reactive power value and the fitting reactive power value, determining a reactive power correlation coefficient; according to the active power correlation coefficient and the reactive power correlation coefficient, determining a total correlation coefficient; and obtaining a power load decomposition coefficient and a power load decomposition result when the active power correlation coefficient, the reactive power correlation coefficient and the total correlation coefficient satisfy preset decomposition conditions. By use of the scheme provided by the invention, the accuracy of power load decomposition can be improved.

The invention discloses a track association method based on target motion information and attribute information, comprising the following steps: step 1: multi-sensor collects motion information and attribute information of multiple targets; step 2 calculates track association degree based on target motion information Step 3 calculates the track correlation degree based on the target attribute information; Step 4 weights and fuses the track correlation degree in step 2 and step 3; The invention uses the track association degree based on the target attribute information as the weight to correct the track association degree based on the target motion information, and measures the conflict between the target attribute information, so as to avoid the false association and missing association of the track, and improve the target track. The correlation accuracy makes it possible to carry out correct track correlation even when there are many multi-target, interference, and cross and bifurcated tracks.

The invention discloses a smart antenna array simulation method, comprising: setting a correlation matrix for the smart antenna array; wherein, the elements in the i-th row and the j-th column identify the degree of correlation between the i-th antenna and the j-th antenna; Perform Kronecker product operation on the correlation matrix of the smart antenna array and the antenna correlation matrix of the UE to obtain the total correlation matrix; perform Cholesky decomposition on the total correlation matrix to obtain the upper triangular matrix; according to the upper triangular matrix and the multipath fading coefficient of the smart antenna array Obtain the multipath fading coefficient on each antenna in the smart antenna array, after multiplying the multipath fading coefficient on each antenna by the power coefficient, obtain the impulse response sequence of the channel between the antennas; The impulse response is convolved with the signal to be sent as the received signal. The invention also discloses a system for realizing the above method. The invention achieves the perfect combination of complexity and simulation approximation.