The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Chaos theory has extensive applications in many fields, and the research on this technique has important theory and practice value, which especially more and more demonstrates its superiority in the weak signal detection. In this paper, application methods of chaos in weak signal detection are instructed. The restraint nonlinear programming method combined optimization algorithm with chaos detection...
Traditional linear analysis methods are difficult to assess dynamics structure of logging signals and to reveal the intrinsic characteristics of the reservoir layer. In this paper, the analysis methods of non-stationary signals and the extraction methods of chaotic properties were given. The run-length method is adopted to verify non-stationary characteristics of real logging data, in the same time,...
Generally, the detecting signal methods based on the chaos theory always cope with the signal whose phase angle is zero. On this basis, this paper expands the method of chaos theory to the situation that the phase angle does not equal zero. According to initial phase angle of different detected signal, different driving force value automatically is set up. Output states of the system are detected...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.