| 摘要 |
The invention relates to a method of detecting transient changes in the distribution of a discrete time series, comprising the steps of: - operating in a sparse mode wherein, at sniff periods successively repeated at a first rate, at most K test phases are performed, K being an integer superior or equal to two, each test phase consisting of analyzing, by a sampling stopping time determination unit, samples of the time series captured by a sampler at sampling times according to a second rate which is higher than the first rate to provide a positive or negative result of the test phase; - if the results of K successive test phases of a sniff period are each positive, switching to operate in a dense mode wherein the sampler is operated to continuously capture samples of the time series at sampling times according to the second sampling rate; wherein a sniff period is ended as soon as the analyzing of the captured samples in a test phase of the sniff period is negative, the sampling of the time series being stopped until the next sniff period; and wherein a next test phase of a sniff period is performed only if the result of the previous test phase of the sniff period is positive, the next test phase being performed with capturing and analyzing at least as many samples as the previous test phase. |
