Periodically correlated, or cyclostationary, time series exhibit statistical properties that vary in a regular, repeating manner. Unlike stationary processes, whose moments remain constant over time, ...

Synopsis: Is the Earth more likely or less likely to be hit by an asteroid or comet now as compared to, say, 20 million years ago? Several studies have claimed to have found periodic variations, with ...

Researchers at Kumamoto University have made a significant breakthrough in the field of control engineering by developing a highly accurate mathematical modeling technique for linear periodically time ...