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110 results about "Standard sequence" patented technology

Time sequence approximate match-based big data abnormal state detection method and device

The invention relates to a time sequence approximate match-based big data abnormal state detection method and system. The method comprises the following steps: partitioning a to-be-detected time sequence into multiple sets according to a data range of the to-be-detected time sequence and a preset partitioning coefficient, and expressing the to-be-detected time sequence through a one-dimensional to-be-detected sequence consisting of numbers of sets where data points are located; expressing a standard time sequence by a one-dimensional standard sequence in the same way; performing Harsh calculation on the one-dimensional to-be-detected sequence and the one-dimensional standard sequence; calculating Jaccard coefficients of the one-dimensional to-be-detected sequence and the one-dimensional standard sequence, and judging that the time sequence with the Jaccard coefficient less than a preset threshold value is a sequence in an abnormal state. According to the time sequence approximate match-based big data abnormal state detection method, by combination of set-based time sequence partitioning and Harsh calculation, the calculation amount of the Jaccard coefficients is reduced; furthermore, the sequence can be further partitioned from coarse to fine, so that the whole calculation speed is guaranteed, and the abnormal state detection precision is also guaranteed.
Owner:工创集团有限公司

Method for generating Fourier coefficient-based symbolic category set of multivariate time sequence

InactiveCN108595528AGuaranteed Distance Lower Bound CriterionAvoid omissionsComplex mathematical operationsDimensionality reductionAlgorithm
The invention discloses a method for generating a Fourier coefficient-based symbolic category set of a multivariate time sequence. The method comprises the steps of: acquiring multivariate time sequence data; pre-processing the multivariate time sequence data to obtain a standard sequence of which a mean value of gaussian distribution is 0 and a variance is 1; performing piecewise processing on the multivariate time sequence through a PAA (Piecewise Aggregate Approximation) algorithm to obtain piecewise information of each sequence; performing DFT (Discrete Fourier Transform) on piecewise dataof the each sequence to obtain a trend characteristic in a sequence piece represented by a Fourier coefficient; performing symbolic representation on the sequence pieces of the multivariate time sequence through an SAX (Symbolic Aggregate Approximation) method, and enabling a symbol and the Fourier coefficient corresponding to the each sequence piece to form a complete symbolic category set of the sequence piece. The method of the invention has the beneficial effects that: dimensionality reduction can be performed on high-dimensional mass multivariate time sequence data, and advantages of theSAX can be maintained; and dimensionality reduction is performed through a frequency-domain filtering method, thus invariance of an Euclidean distance can be maintained.
Owner:CHONGQING UNIV

Burst signal frequency deviation correction method applied to satellite phones

ActiveCN104378317AAvoid dependenceSolve the technical problem that the frequency offset estimation will be inaccurateBaseband system detailsPhase differenceLocal sequence
The invention discloses a burst signal frequency deviation correction method applied to satellite phones. The method comprises the steps that signals are received, and data caching is carried out on the signals; local standard sequences are generated, and shaping filtering is carried out on the local standard sequences; sliding correlation is carried out on the cached signals and local sequences obtained after shaping filtering, and the initial positions of burst signals are found according to correlation peaks; according to the obtained initial positions of the burst signals, a complete set of burst signals are taken out of a cache, and phase difference calculation of corresponding points of the burst signals and the local standard sequences is carried out; the phase difference slope is worked out according to N corresponding points received continuously, phase jump removal and glitch removal are carried out on an obtained slope curve, linear processing is carried out on a slope curve obtained after phase jump removal and glitch removal, and then a frequency deviation estimated value is obtained. The method eliminates dependence on channel estimation in the prior art and is accurate in frequency deviation estimation.
Owner:CHENGDUSCEON TECH

Method for detecting cyclic prefix length in time division duplex system

The invention discloses a method for detecting the cycle prefix length in a time division duplex system, which comprises the steps of: broadcasting synchronization information by a system through a base station, wherein the synchronization information comprises a master synchronization signal and an auxiliary synchronization signal, and at least one orthogonal frequency division multiplexing (OFDM) symbol is arranged between the master synchronization signal and the auxiliary synchronization signal; capturing synchronization information of the system by a terminal unit to detect the master synchronization signal and determine the position of the master synchronization signal; obtaining two auxiliary synchronization signal sequences from the synchronization information of the system by the terminal unit based on the determined master synchronization signal position and respectively in accordance with conditions of short cycle prefix and long cycle prefix; and carrying out correlation of the obtained two auxiliary synchronization signal sequences respectively with an auxiliary synchronization signal standard sequence determined in advance and judging the length of the cycle prefix based on relevant result, both by the terminal unit. By adopting the technical proposal, the method for detecting the cycle prefix length in the time division duplex system can acquire better detecting property.
Owner:DATANG MOBILE COMM EQUIP CO LTD

Method for determining content of additive in lithium ion battery electrolyte

The invention discloses a method for determining the content of an additive in lithium ion battery electrolyte, and the method comprises the following steps of firstly, manufacturing and obtaining a plurality of standard sequence batteries; secondly, charging each standard sequence battery at constant current, and measuring voltage and capacity; thirdly, drawing a capacity differential curve of each standard sequence battery to obtain a reaction peak position and integrating to obtain reaction peak height and peak area data; fourthly, drawing a scatter diagram of the standard sequence battery,and fitting to obtain a quantitative relation between the quality of the additive and the reaction peak area or peak height data; fifthly, as for the electrolyte to be measured having the additive tobe measured, manufacturing electrolyte battery to be measured; and sixthly, drawing a capacity differential curve of the electrolyte battery to be measured to obtain the reaction peak position, integrating to obtain reaction the peak height and peak area data, and calculating the quality of the additive with the content to be measured. The method for determining the content of the additive in lithium ion battery electrolyte can accurately and reliably measure the content of the additive in the lithium ion battery electrolyte.
Owner:TIANJIN LISHEN BATTERY +1

Method of analysis of primary structural change of nucleic acid

The object of the present invention is to offer a method for analyzing primary structure change of nucleic acid which has quantifiability, which has a high degree of sensitivity and reproducibility, and which can be conducted rapidly and at low cost. The method of analysis of primary structural change of nucleic acid of the present invention includes a process for obtaining a reference nucleic acid having a standard sequence and a target sequence, each sequence being bound by a first ligand that differs depending on type of the sequence to which it binds, and being bound by a second ligand; a process for specifically binding first ligands to receptors supported on a carrier, thereby immobilizing standard sequences and target sequences on the carrier; a process for specifically binding labeled receptors to the second ligands in said nucleic acids which have been immobilized; a process for detecting labels to detect standard sequences and target sequences; a process for obtaining the ratio of standard sequences in the reference nucleic acid and subject nucleic acid, calculating a coefficient which corrects detection values of target sequences, and conducting correction; and a process for confirming an increase / decrease in the quantity of target sequences in the subject nucleic acid relative to target sequences in the reference nucleic acid.
Owner:OLYMPUS CORP
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