Method for exploring target curve from known data sequence, system and medium
A technology with known data and target curves, applied in the signal detection field of signal analysis, can solve problems such as the inability to test a single index value, the inability to give hypothesis test results, and the lack of distribution probability density, etc., achieving high accuracy and simple steps Clear and objective effect
Active Publication Date: 2020-05-22
NAT UNIV OF DEFENSE TECH
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Problems solved by technology
The disadvantage is that for a single data sequence to be tested, the above method can only give the value of a single evaluation index, and cannot give objective hypothesis test results
The main reason is the lack of the distribution probability density of the index value under each condition of "with target curve" or "without target curve"; and lack of reference system, only a single index value cannot be tested
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[0027] The following will be figure 1 The target curve shown is sinusoidal, the data sequence is known s 0 Taking the azimuth modulation curve of the local field potential (LFP) signal measured in the primary visual cortex of the animal as an example, the method, system and medium for detecting the target curve from the known data sequence of the present invention are further described in detail. Among them, the function expression of the sine curve is:
[0028] ( y=a*sin(θ)+b*cos(θ)+c )
[0029] It should be noted that the working principle of the present invention is to s 0 The method of multiple scrambling obtains enough scrambled copies that satisfy the condition of "no target curve". The original data sequence after scrambling has exactly the same data sampling points as the original data sequence, but the order of the sampling points is random. , so the data arrangement of each scrambled copy does not conform to the waveform of the target curve, and these scrambl...
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The invention discloses a method for exploring a target curve from a known data sequence, a system and a medium. The method comprises the following steps: scrambling a known data sequence s0 for manytimes to obtain enough scrambled copies meeting the condition of 'not containing a target curve', wherein the scrambled copy of the original data sequence and the original data sequence have completely same data sampling points, but the arrangement sequence of the sampling points is random, therefore, the data arrangement of each scrambled copy does not accord with the target curve waveform, and all the scrambled copies meet the condition that no target curve is contained; calculating and counting fitting index values of the copies to obtain the estimation of the curve fitting index value distribution probability density function under the condition that the data sequence does not contain the target curve can be obtained, so that the target curve can be explored in the obtained known datasequence. The method has the advantages of good objectivity, high accuracy, simple and convenient operation method, simple and clear steps and easiness in implementation.
Description
technical field [0001] The invention relates to a signal detection technology for signal analysis, in particular to a method, system and medium for detecting a target curve from a known data sequence, which can realize the detection of a target curve in the obtained known data sequence. Background technique [0002] In the field of signal analysis, sometimes it is necessary to check whether the measured data sequence contains the target waveform of interest, that is, to judge whether each data point of the data sequence is arranged according to a waveform of interest. In the situation discussed in this manual, if the measured data sequence contains the target waveform, the data sequence can be expressed as the target curve plus background noise; if there is no target waveform, the data sequence is only background noise. Evaluating whether there is a target curve in a data series can be carried out by evaluating the degree of agreement between the original data series and the...
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IPC IPC(8): G06K9/00G06K9/62
CPCG06F2218/12G06F18/2415
Inventor 李明胡德文
Owner NAT UNIV OF DEFENSE TECH